CN202483186U - Box beam, cantilever crane, supporting leg and engineering machine - Google Patents
Box beam, cantilever crane, supporting leg and engineering machine Download PDFInfo
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- CN202483186U CN202483186U CN2012201102297U CN201220110229U CN202483186U CN 202483186 U CN202483186 U CN 202483186U CN 2012201102297 U CN2012201102297 U CN 2012201102297U CN 201220110229 U CN201220110229 U CN 201220110229U CN 202483186 U CN202483186 U CN 202483186U
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- 239000002131 composite material Substances 0.000 claims abstract description 151
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 24
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 description 24
- 238000003466 welding Methods 0.000 description 9
- 238000004026 adhesive bonding Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a box beam. A box-shaped structure is enclosed by a plurality of sheet materials, wherein at least the sheet material at the pulled side of the box beam is a composite material plate. The box beam disclosed by the utility model sufficiently utilizes the mechanical property of the section of the box beam under a cantilever crane, and the composite material plate is adopted at least at the pulled side of the box beam; compared with the prior art that the composite material plate is stuck on the outer surface of a steel plate, the essential distinguish is that the steel plate of the previous box beam is saved and the pulled acting force of the box beam is completely borne by the composite material plate and the characteristic that the pulled strength of the composite material plate is sufficiently expressed, so that the whole strength of the box beam is improved; and the steel plate at the pulled side of the box beam is replaced by the composite material plate so that the bearing performance and the stressing performance of the box beam are improved and the weight of the box beam is extremely reduced. The utility model further provides the cantilever crane, a supporting leg and an engineering machine comprising the cantilever crane and/or the supporting leg.
Description
Technical field
The utility model relates to engineering machinery field, the jib, the supporting leg that more specifically, relate to a kind of box-girder, adopt this box-girder to process, and the engineering machinery that comprises above-mentioned jib and/or supporting leg.
Background technology
The jib of concrete mixer belongs to box girder structure, needs level to overhang during operation, and box-girder will bear huge moment of flexure under this cantilever working condition, wherein bears huge pulling force on the neutral line of box-girder.Therefore, need to adopt and bear tensile stress, to guarantee the strength and stiffness of jib than heavy-gauge sheeting.So the sheet material of existing jib is generally thicker, not only increases jib weight, reduced the flexibility of jib action, go back waste material, increased manufacture difficulty.In addition, the jib own wt has further constituted jib load, and general arrangement that will certainly the restricted arm frame system than the heavy-gauge sheeting jib structure increases design difficulty; If the jib gross weight is excessive even can influence the global design that concrete mixer etc. has jib machinery, seriously restricted the development of overlength jib technology.In addition; The supporting leg that is used for engineering machinery such as concrete pump, crane also adopts box girder structure; Need complete machine be supported in working order, thereby box-girder needs to bear bigger moment of flexure, wherein bears huge pulling force under the neutral line of box-girder.
In the prior art, general four block plates that adopt of above-mentioned box-girder are welded.As shown in Figure 1, be the cross section structure sketch map of a kind of box-girder of providing in the correlation technique, this box-girder can be used in the jib of concrete mixer, and this box-girder comprises that four block plates surround box structure.For load-carrying properties and the stress performance that improves box-girder, fixedly install composite panel at the top board of box-girder, the external surface of base plate, utilize the high-intensity performance of this composite panel to improve the load-carrying properties and the stress performance of jib; On the other hand, under the situation that guarantees jib load-carrying properties and stress performance, can reduce the thickness of sheet material, thereby lower the weight of whole jib.In technique scheme; External surface at steel plate is provided with composite material; Composite material is only as the auxiliary structure that strengthens; The high-intensity performance of composite panel is not fully exerted, and the weight of steel plate still occupies bigger proportion in whole jib load, and still there is bigger room for improvement in the light-weight design of jib.
The utility model content
First purpose of the utility model is to propose a kind of box-girder, and this box-girder has been given full play to the high-intensity performance of composite material, has improved the intensity of box-girder, has alleviated the weight of box-girder significantly.Second purpose of the utility model is to propose a kind of jib, a kind of supporting leg, adopts above-mentioned box-girder to process.The utility model has also proposed a kind of engineering machinery of using above-mentioned jib and/or supporting leg.
In order to realize first purpose of the utility model, the utility model provides a kind of box-girder, surrounds box structure by multi-sheets, and the sheet material of the tension side of said at least box-girder is composite panel.In the technical scheme that the utility model proposes; At least the sheet material of the tension side of box-girder adopts composite panel; With in the prior art with composite panel stick on the steel plate external surface have essence difference; So just save the steel plate of original box-girder, born the active force that drawn of box-girder fully by composite panel, given full play to the high-intensity performance of composite panel; Adopt composite panel to substitute the steel plate of box-girder tension side, in the load-carrying properties and stress performance that improve box-girder, can greatly alleviate the weight of box-girder.
In technique scheme, preferably, said box-girder is surrounded by top board, base plate and two side plates, and said top board and/or said base plate are flat composite panel, and other are steel plate.In actual application; Top board and/or base plate are that bearing in the box-girder receives the maximum position of pulling force, so, with the top board and/or the base plate employing composite panel of box-girder; Can bring into play the high characteristics of composite panel tensile strength to greatest extent, thereby improve the bulk strength of box-girder.
In technique scheme, preferably, the end of two said side plates is equipped with first junction plate, and said composite panel is fixedly connected through adhesive means and/or mechanical connection manner with said first junction plate.Force analysis according to box-girder; The thinner thickness of two side plates in the box-girder in design process, side plate does not have enough installing spaces to be fixedly connected with composite panel, has therefore adopted in side end first junction plate is set; Composite panel is fixedly connected with first junction plate; This has just increased the contact area of side plate and composite panel, can realize being fixedly connected of composite panel and biside plate easily, securely, and the said fixing ways of connecting can be gluing connection; Also can be mechanical connection manner, can also be gluing and compound mode mechanical connection.
In technique scheme, preferably, the end of two said side plates to the inside and/or the outside extend to form said first junction plate.First junction plate be by side plate to the inside and/or the outside extend and to form; First junction plate and side plate are steel plate; Can avoid on side plate welding steel to simplify the mounting structure of box-girder like this, and avoid the means that are welded to connect in the box-girder with form of structure as first junction plate.Certainly, also can be in the utility model in the inboard of side plate and/or outside welding steel with as first junction plate.
In technique scheme, preferably, said composite panel is that bolt is connected with the mechanical connection manner of said first junction plate.Bolt is passed the composite panel and first junction plate, composite panel and two side plates are fixed up; Can also between the composite panel and first junction plate, scribble glue-line, further improve fixed connection performance between the two.Adopt the bolt connected mode, bolted good stability can guarantee the bonding strength between the composite panel and first junction plate, and this connected mode installing/dismounting is easy to operate, is convenient to the regular maintenance of box-girder.
In technique scheme, preferably, the opposite side that is positioned at said first junction plate at said composite panel also is provided with pressing plate, and said composite panel is clipped in said pressing plate and also is connected through bolt with said first junction plate is middle.In this technical scheme; Pressing plate, be steel plate from outward extending first junction plate of side plate, composite panel is clipped in the middle of the pressing plate and first junction plate, when the box-girder bearing load; Be always the face way of contact between the three; With in the middle of composite panel tightly is fixed on, the some contact that can avoid first junction plate and/or composite panel distortion to occur and form at the bolt link position, thus improved the connective stability and the reliability of composite panel and side plate; On the other hand; The opposite side that is positioned at first junction plate at composite panel also is provided with pressing plate; Increased the contact area of first junction plate and composite panel, and kept, when composite panel bears pulling force through pressing plate; Can avoid the link position between the composite material and first junction plate phenomenons such as ftractureing, pull to occur, thereby further improve the load-carrying properties and the stress performance of composite panel.
In the another kind of box-girder that the utility model provides, said box-girder is surrounded by top board, base plate and two side plates, and said top board is that cross section is inverted U-shaped composite panel, and said base plate and two side plates are steel plate.Because box-girder is semi girder in working order down, there is a neutral line in box-girder depth of section direction, and pulling force is born on the top of neutral line, and pulling force is upwards increased by neutral line gradually; Pressure is born in the bottom of neutral line, and pressure is increased downwards by neutral line gradually.The present technique scheme can adopt composite panel with the part in compression more than the box-girder neutral line, can give full play to the tensile property of composite material, and steel plate is in pressurized zone simultaneously, can bring into play its very strong compressive property.
In technique scheme, preferably, the inboard of said composite panel dual-side is fixedly connected through adhesive means with the outside of two said side plates respectively.
In technique scheme; Preferably; The end of two said side plates is equipped with first junction plate, and the end of said composite panel dual-side is equipped with second junction plate, and said first junction plate is fixedly connected through adhesive means and/or mechanical connection manner with said second junction plate.
In technique scheme, preferably, the end of two said side plates to the inside and/or the outside extend to form said first junction plate, the end of the dual-side of said composite panel to the inside and/or the outside extend to form said second junction plate.In actual application, can also be in the end of side plate welding steel to be connected with composite panel as first junction plate.
In technique scheme, preferably, the mechanical connection manner of said first junction plate and said second junction plate is that bolt is connected.
In technique scheme, preferably, the opposite side that is positioned at said first junction plate at said second junction plate also is provided with pressing plate, and said second junction plate is clipped in said pressing plate and also is connected through bolt with said first junction plate is middle.In this technical scheme; Pressing plate, be steel plate from outward extending first junction plate of side plate, be clipped in the pressing plate and first junction plate from outward extending second junction plate of composite panel in the middle of, when the box-girder bearing load; Be always the face way of contact between the three; With in the middle of second junction plate tightly is fixed on, the some contact that can avoid composite connection board and/or side plate distortion to occur and form at the bolt link position, thus improved the connective stability and the reliability of composite panel and side plate; On the other hand; The opposite side that is positioned at first junction plate at second junction plate is provided with pressing plate; Increased the contact area of first junction plate and second junction plate, and kept, when composite panel bears pulling force through pressing plate; Can avoid the link position between second junction plate and first junction plate phenomenons such as ftractureing, pull to occur, thereby further improve the load-carrying properties and the stress performance of composite panel.
In technique scheme, preferably, said composite panel is the carbon fibre composite plate.
The utility model also provides a kind of jib, comprises the joint arm that more piece is hinged successively, and the said joint arm of at least one joint adopts above-mentioned box-girder to process.
The utility model also provides a kind of supporting leg, comprises outrigger arm and the supporting leg of being located at its end, and said outrigger arm adopts above-mentioned box-girder to process.
The utility model also provides a kind of engineering machinery, adopts above-mentioned jib and/or supporting leg.
The technical scheme that the utility model provides has following beneficial effect:
The utility model provides a kind of box-girder, made full use of the cross section mechanical property of box-girder under the cantilever situation, the tension side at box-girder adopts composite panel at least.With respect in the prior art composite panel being sticked on the difference that the steel plate external surface has essence; Saved the steel plate of original box-girder; And bear the active force that drawn of box-girder fully by composite panel; Give full play to the high characteristics of composite panel tensile strength, thereby improved the bulk strength of box-girder; Adopt composite panel to substitute the steel plate of box-girder tension side, in the load-carrying properties and stress performance that improve box-girder, can greatly alleviate the weight of box-girder.
Description of drawings
Fig. 1 is the cross section structure sketch map of a kind of box-girder in the correlation technique;
Fig. 2 is the cross section structure sketch map of a kind of box-girder among the utility model first embodiment;
Fig. 3 is the cross section structure sketch map of a kind of box-girder among the utility model second embodiment;
Fig. 4 is the cross section structure sketch map of a kind of box-girder among the utility model the 3rd embodiment;
Fig. 5 is the cross section structure sketch map of a kind of box-girder among the utility model the 4th embodiment;
Fig. 6 is the cross section structure sketch map of a kind of box-girder among the utility model the 5th embodiment;
Fig. 7 is the cross section structure sketch map of a kind of box-girder among the utility model the 6th embodiment.
The specific embodiment
In order to make those skilled in the art understand the technical scheme of the utility model better, the utility model is further specified below in conjunction with accompanying drawing and embodiment.Need to prove that under the situation of not conflicting, the application's embodiment and the characteristic among the embodiment can make up each other.
A lot of details have been set forth in the following description so that make much of the utility model; But; The utility model can also adopt other to be different from other modes described here and implement, and therefore, the utility model is not limited to the restriction of following disclosed specific embodiment.
Based on prior art, in engineering machinery field, the jib of concrete mixer belongs to the box-shaped cantilever beam structure; Descend the jib level to overhang in working order; This box girder structure will bear huge moment of flexure, is being semi girder, and there is formation one neutral line in box-girder depth of section direction; Huge pulling force need be born in the top of neutral line, and pulling force is upwards increased by neutral line gradually; Pressure need be born in the bottom of neutral line, and pressure is increased downwards by neutral line gradually.
In order to realize the purpose of the utility model, according to the cross section mechanical property of box-girder under the cantilever situation, the utility model provides a kind of box-girder, surround box structure by multi-sheets, the tension side at box-girder adopts composite panel at least; This box-girder has been given full play to the high characteristics of composite panel tensile strength, thereby has improved the bulk strength of box-girder; Adopt composite panel to substitute the steel plate of box-girder tension side, in the load-carrying properties and stress performance that improve box-girder, can greatly alleviate the weight of box-girder.
Below through concrete embodiment, the structure of box-girder in the utility model is elaborated.
As shown in Figures 2 and 3, be respectively first embodiment of a kind of box-girder of the utility model proposition, the cross section structure sketch map of second embodiment.In this embodiment, composite material is a plate-like structure.
With reference to accompanying drawing, the utility model provides a kind of box-girder, and this box-girder is surrounded by top board 10, base plate 20 and left plate 30 and right plate 40, and wherein, top board 10 is flat composite panel, and base plate 20, left plate 30 and right plate 40 are steel plate.
In this specific embodiment; According to the cross section mechanical property of box-girder under the cantilever situation; Top board 10 is positioned at the topmost of neutral line, so the pulling force that top board 10 is born should be maximum, therefore; For load-carrying properties and the stress performance that improves whole box-girder, need improve the tensile property of top board 10.On this basis, the top board 10 with box-girder adopts composite panel to substitute steel plate of the prior art.This box girder structure; With in the prior art with composite panel stick on the steel plate external surface have essence difference; So just saved the steel plate of original box-girder; Bear the active force that drawn of box-girder in working order down fully by composite panel, given full play to the high-intensity performance of composite panel; And substitute steel plate by composite material, the in light weight of the weight ratio steel plate of composite material much guaranteed the box-girder load-carrying properties and accepted under the prerequisite of performance, alleviated the weight of box-girder significantly.
According to the mounting means of box-girder, also can bear pulling force by the base plate of box-girder, for example be applied in the supporting leg in the engineering machinery; Descend the base plate of supporting leg to bear pulling force in working order; At this moment, the flat composite panel of base plate 20 employings with box-girder just has above-mentioned technique effect too.
Need to prove that in actual application, when box-girder had multiple operating attitude, under a kind of operating attitude, the top board 10 of box-girder carried pulling force, under another kind of operating attitude, the base plate 20 of box-girder carries pulling force.For example, concrete mixer is when cloth, and jib can be done the rotation and the upset of multi-angle, and therefore, corresponding variation also takes place the advancing side of jib, and promptly the top board 10 of box-girder bears pulling force with base plate 20 under the different working attitude.In order to adapt to this loading characteristic, can all adopt composite panel with base plate 20 at the top board 10 of box-girder, thereby make box-girder satisfy this application demand.
On the said structure basis, can the connected mode of composite panel in the box-girder and side plate further be limited.Concrete, being equipped with first junction plate 5 in the end of left plate 30 and right plate 40, composite panel is fixedly connected through adhesive means and/or mechanical connection manner with first junction plate 5.
Force analysis according to box-girder; The thinner thickness of two side plates in the box-girder in design process; Side plate does not have enough installing spaces to be fixedly connected with composite panel, has therefore adopted in side end first junction plate 5 is set, and composite panel is fixedly connected with first junction plate 5; This has just increased the contact area of side plate and composite panel, can realize being fixedly connected of composite panel and biside plate securely.
Above-mentioned first junction plate 5 that is arranged on the end of left plate 30 and right plate 40, can be in the inboard of two side plates and/or outside welding steel with as first junction plate 5.The means that are welded to connect in the box-girder; First junction plate 5 can also by the end of two side plates to the inside and/or the outside extend and form; Such first junction plate 5 be by side plate to the inside and/or the outside extend and to form, first junction plate 5 is steel plate with side plate, can avoid on side plate welding steel with the form of structure as first junction plate 5 like this; Simplified the mounting structure of box-girder, and the defective of having avoided welding connecting mode to exist.
In concrete implementation procedure, the said fixing ways of connecting can be gluing connection, also can be mechanical connection manner, can also be gluing and compound mode mechanical connection.This mechanical connection manner can be bolt connecting mode.Adopt the bolt connected mode, bolted good stability can guarantee the bonding strength between the composite panel and first junction plate, and this connected mode installing/dismounting is easy to operate, is convenient to the regular maintenance of box-girder.
In a kind of specific embodiment; As shown in Figure 2; Stretching out respectively in the end of left plate of box-girder 30 and right plate 40 forms first junction plate 5, is coated with upper glue layer at the external surface of first junction plate 5, and composite panel is connected with two first junction plates 5 through adhesive means.Adopt adhesive means that composite material and first junction plate 5 are linked together, thus being fixedly connected of realization composite panel and two side plates.
In another kind of specific embodiment, as shown in Figure 3, the left plate 30 of box-girder and the end of right plate 40 stretch out respectively and form first junction plate 5, through bolt 7 composite panel are fixedly connected with two first junction plates 5.Certainly, in this embodiment, can also be coated with upper glue layer at the external surface of first junction plate 5, composite material is connected through gluing with two first junction plates 5, and through bolt 7 composite panel and two first junction plates 5 is fixed together.Adopt gluing connection and mechanical connection, composite panel is carried out double fixed with two first junction plates 5 be connected, improved the stability and the reliability that are fixedly connected.
In this embodiment, the opposite side that is positioned at first junction plate 5 at composite panel also is provided with pressing plate 8, and composite panel is clipped in pressing plate 8 and also is fixedly connected through bolt 7 with first junction plate, 5 centres.This pressing plate 8 is a steel plate.Understandable; Composite panel is clipped in the middle of the pressing plate 8 and first junction plate 5; When the box-girder bearing load, be always the face way of contact between the three, in the middle of composite panel tightly is fixed on; Can avoid first junction plate 5 and/or composite panel to occur being out of shape and contacting, thereby improve the connective stability and the reliability of composite panel and side plate at the point that the bolt link position forms; On the other hand; The opposite side that is positioned at first junction plate 5 at composite panel also is provided with pressing plate 8; Pressing plate 8 has increased the contact area of first junction plate and composite panel, and keeps through pressing plate, when composite panel bears pulling force; Can avoid the link position between the composite material and first junction plate phenomenons such as ftractureing, pull to occur, thereby further improve the load-carrying properties and the stress performance of composite panel.
In the above embodiments, composite panel is the carbon fibre composite plate.Certainly, other composite panels with good compressive property all belong within the protection domain of the utility model.
Need to prove, in the above-described embodiments,, between base plate 20 and left plate 30 and right plate 40, gusset 9 is set also, to improve the bulk strength of steel plate for load-carrying properties and the stress performance that improves whole box-girder.
Like Fig. 4 and shown in Figure 7, be respectively the cross section structure sketch map of the 3rd, the 4th, the 5th, the 6th embodiment of a kind of box-girder that the utility model proposes.In this embodiment, composite material is that cross section is inverted U-shaped.
With reference to accompanying drawing; The utility model provides a kind of box-girder, and this box-girder is surrounded by top board 10, base plate 20 and left plate 30 and right plate 40, wherein; Top board 10 is inverted U-shaped composite panel for cross section, and base plate 20 and left plate 30 are steel plate with right plate 40.The composite panel of this inverted U structure has two sides, and is fixedly connected with two side plates respectively through these two sides.
In this technical scheme, according to the cross section mechanical property of box-girder under the cantilever situation, there is a neutral line in box-girder depth of section direction, and pulling force is born on the top of neutral line, and pulling force is upwards increased by neutral line gradually; Pressure is born in the bottom of neutral line, and pressure is increased downwards by neutral line gradually.Therefore, for load-carrying properties and the stress performance that improves whole box-girder, the above composite panel that adopts of box-girder neutral line adopts composite panel to bear pulling force.Need to prove; In actual application; About composite panel is not that strictness is limited to more than the neutral line of box-girder; Promptly the side edge length of inverted U-shaped composite panel is not limited in the above-described embodiments, as long as be inverted U-shaped composite panel for cross section with the pulling force that bears box-girder just within the protection domain at the utility model at top board 10 yet.
Part in compression more than the box-girder neutral line is adopted composite panel, can give full play to the tensile property of composite material, steel plate is in pressurized zone simultaneously, can bring into play its very strong compressive property; In addition, in the load-carrying properties and stress performance that improve box-girder, can also greatly alleviate the weight of box-girder.
In a kind of specific embodiment, as shown in Figure 4, the inboard of composite panel dual-side is fixedly connected through adhesive means with the outside of left plate 30 with right plate 40 respectively.For load-carrying properties and the stress performance that improves whole box-girder, can also between base plate 20 and left plate 30 and right plate 40, gusset 9 be set also, to improve the bulk strength of steel plate.
In another kind of specific embodiment, composite panel can also be fixedly connected with two side plates respectively through mechanical connection manner, like Fig. 5, and Fig. 6 and shown in Figure 7, concrete, this mechanical connection manner can connect for bolt.
Concrete; End at left plate 30 and right plate 40 is respectively equipped with first junction plate 5; The end that is the dual-side of inverted U-shaped composite panel at cross section is equipped with second junction plate 6; First junction plate 5 is fixedly connected through mechanical connection manner with second junction plate 6, thereby realizes being fixedly connected of composite panel and two side plates.
Above-mentioned first junction plate 5 that is arranged on the end of left plate 30 and right plate 40, can be in the inboard of two side plates and/or outside welding steel with as first junction plate 5.First junction plate 5 can also by the end of two side plates to the inside and/or the outside extend and form; Such first junction plate 5 be by side plate to the inside and/or the outside extend and to form; First junction plate 5 is steel plate with side plate; Can avoid on side plate welding steel to simplify the mounting structure of box-girder like this with form of structure as first junction plate 5, and the defective of having avoided welding connecting mode to exist.In addition, second junction plate 6 for the end of the dual-side of composite panel to the inside and/or the outside extend and form, certainly, second junction plate 6 is also processed for composite material.
In a kind of specific embodiment; As shown in Figure 5; End at left plate 30 and right plate 40 is outward extended with first junction plate 5 respectively; Two sides of composite panel are outward extended with second junction plate, 6, the first junction plates 5 respectively and are fixedly connected through bolt 7 with second junction plate 6, thereby have realized being fixedly connected of composite panel and two side plates.In this embodiment, the joint face between first junction plate 5 and second junction plate 6 can be the neutral line of box-girder, also can be at neutral line near part in tension or part in compression, and its particular location does not limit.
In a kind of specific embodiment; As shown in Figure 6; First junction plate 5 has extended internally respectively in the end of left plate 30 and right plate 40; Two sides of composite panel, second junction plate, 6, the first junction plates 5 that extended internally respectively are fixedly connected through bolt 7 with second junction plate 6, thereby have realized being fixedly connected of composite panel and two side plates.
In a kind of specific embodiment; As shown in Figure 7; End at left plate 30 and right plate 40 inwardly and outwards is extended with first junction plate 5 respectively respectively; Two sides of composite panel respectively inwardly be outward extended with second junction plate 6, corresponding first junction plate 5 is fixedly connected through bolt 7 with second junction plate 6, thereby has realized being fixedly connected of composite panel and two side plates.
Like Fig. 5; Among Fig. 6 and the embodiment shown in Figure 7; Can also adopt the combination connecting mode of adhesive means and mechanical connection manner; External surface at first junction plate 5 is coated with upper glue layer, and second junction plate 6 is connected through gluing with first junction plate 5, and through bolt 7 composite panel and two first junction plates 5 is fixed together.Adopt gluing connection and mechanical connection, second junction plate 6 is carried out double fixed with first junction plate 5 be connected, improved the stability and the reliability that are fixedly connected between composite panel and two side plates.
In the above-described embodiments; The opposite side that is positioned at first junction plate 5 at second junction plate 6 also is provided with pressing plate (can referring to figs. 2 and 3 the installation site of center platen); Second junction plate 6 is clipped in pressing plate and also is fixedly connected through bolt 7 with first junction plate, 5 centres, and pressing plate is a steel plate.
In this technical scheme; In the middle of being clipped in the pressing plate and first junction plate from outward extending second junction plate of composite panel; When the box-girder bearing load, be always the face way of contact between the three, in the middle of second junction plate tightly is fixed on; Can avoid composite connection board and/or side plate to occur being out of shape and contacting, thereby improve the connective stability and the reliability of composite panel and side plate at the point that the bolt link position forms; On the other hand; The opposite side that is positioned at first junction plate at second junction plate is provided with pressing plate; Increased the contact area of first junction plate and second junction plate, and kept, when composite panel bears pulling force through pressing plate; Can avoid the link position between second junction plate and first junction plate phenomenons such as ftractureing, pull to occur, thereby further improve the load-carrying properties and the stress performance of composite panel.
In the above embodiments, composite panel is the carbon fibre composite plate.Certainly, other composite panels with good compressive property all belong within the protection domain of the utility model.
In sum, a kind of box-girder that the utility model proposes has made full use of the cross section mechanical property of box-girder under the cantilever situation, and the tension side at box-girder adopts composite panel at least.With respect in the prior art composite panel being sticked on the difference that the steel plate external surface has essence; Saved the steel plate of original box-girder; And bear the active force that drawn of box-girder fully by composite panel; Give full play to the high characteristics of composite panel tensile strength, thereby improved the bulk strength of box-girder; Adopt composite panel to substitute the steel plate of box-girder tension side, in the load-carrying properties and stress performance that improve box-girder, can greatly alleviate the weight of box-girder.
The utility model also provides a kind of jib, comprises the joint arm that more piece is hinged successively, and the said joint arm of at least one joint adopts above-mentioned box-girder to process.
On the other hand, the utility model also provides a kind of supporting leg, comprises outrigger arm and the supporting leg of being located at its end, and said outrigger arm adopts above-mentioned box-girder to process.
The utility model also provides a kind of engineering machinery, adopts above-mentioned jib and/or supporting leg.For example, this project machinery is concrete mixer.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (16)
1. a box-girder surrounds box structure by multi-sheets, it is characterized in that, the sheet material of the tension side of said at least box-girder is composite panel.
2. box-girder according to claim 1 is characterized in that, said box-girder is surrounded by top board (10), base plate (20) and two side plates, and said top board (10) and/or said base plate (20) are flat composite panel, and other are steel plate.
3. box-girder according to claim 2 is characterized in that, the end of two said side plates is equipped with first junction plate (5), and said composite panel is fixedly connected through adhesive means and/or mechanical connection manner with said first junction plate (5).
4. box-girder according to claim 3 is characterized in that, the end of two said side plates to the inside and/or the outside extend to form said first junction plate (5).
5. box-girder according to claim 4 is characterized in that, said composite panel is that bolt is connected with the mechanical connection manner of said first junction plate (5).
6. box-girder according to claim 5; It is characterized in that; The opposite side that is positioned at said first junction plate (5) at said composite panel also is provided with pressing plate (8), and said composite panel is clipped in said pressing plate (8) and also is connected through bolt with said first junction plate (5) is middle.
7. box-girder according to claim 1 is characterized in that, said box-girder is surrounded by top board (10), base plate (20) and two side plates, and said top board (10) is inverted U-shaped composite panel for cross section, and said base plate (20) and two side plates are steel plate.
8. box-girder according to claim 7 is characterized in that, the inboard of said composite panel dual-side is fixedly connected through adhesive means with the outside of two said side plates respectively.
9. box-girder according to claim 7; It is characterized in that; The end of two said side plates is equipped with first junction plate (5); The end of said composite panel dual-side is equipped with second junction plate (6), and said first junction plate (5) is fixedly connected through adhesive means and/or mechanical connection manner with said second junction plate (6).
10. box-girder according to claim 9; It is characterized in that; The end of two said side plates to the inside and/or the outside extend to form said first junction plate (5), the end of the dual-side of said composite panel to the inside and/or the outside extend to form said second junction plate (6).
11. box-girder according to claim 10 is characterized in that, the mechanical connection manner of said first junction plate (5) and said second junction plate (6) is that bolt is connected.
12. box-girder according to claim 11; It is characterized in that; The opposite side that is positioned at said first junction plate (5) at said second junction plate (6) also is provided with pressing plate (8), and said second junction plate (6) is clipped in said pressing plate (8) and also is connected through bolt with said first junction plate (5) is middle.
13., it is characterized in that said composite panel is the carbon fibre composite plate according to each described box-girder of claim 1 to 12.
14. a jib comprises the joint arm that more piece is hinged successively, it is characterized in that, the said joint arm of at least one joint adopts to be processed like each described box-girder in the claim 1 to 13.
15. a supporting leg comprises outrigger arm and the supporting leg of being located at its end, it is characterized in that said outrigger arm adopts and processes like each described box-girder in the claim 1 to 13.
16. an engineering machinery is characterized in that, adopts jib as claimed in claim 14 and/or supporting leg as claimed in claim 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201102297U CN202483186U (en) | 2012-03-21 | 2012-03-21 | Box beam, cantilever crane, supporting leg and engineering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201102297U CN202483186U (en) | 2012-03-21 | 2012-03-21 | Box beam, cantilever crane, supporting leg and engineering machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483186U true CN202483186U (en) | 2012-10-10 |
Family
ID=46957616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201102297U Withdrawn - After Issue CN202483186U (en) | 2012-03-21 | 2012-03-21 | Box beam, cantilever crane, supporting leg and engineering machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202483186U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535857A (en) * | 2012-03-21 | 2012-07-04 | 三一重工股份有限公司 | Box beam, arm support, outrigger and engineering machine |
| CN102926540A (en) * | 2012-11-09 | 2013-02-13 | 连云港鹰游碳塑材料有限责任公司 | Pump truck arm rest made of carbon fiber composite materials |
| CN106429806A (en) * | 2016-11-16 | 2017-02-22 | 北京特种机械研究所 | Composite material lifting point mechanism for lifting |
-
2012
- 2012-03-21 CN CN2012201102297U patent/CN202483186U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535857A (en) * | 2012-03-21 | 2012-07-04 | 三一重工股份有限公司 | Box beam, arm support, outrigger and engineering machine |
| CN102535857B (en) * | 2012-03-21 | 2015-07-01 | 三一重工股份有限公司 | Box beam, arm support, outrigger and engineering machine |
| CN102926540A (en) * | 2012-11-09 | 2013-02-13 | 连云港鹰游碳塑材料有限责任公司 | Pump truck arm rest made of carbon fiber composite materials |
| CN106429806A (en) * | 2016-11-16 | 2017-02-22 | 北京特种机械研究所 | Composite material lifting point mechanism for lifting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20150701 |
|
| RGAV | Abandon patent right to avoid regrant |