CN117227958B - A flexible fixing bracket for exhaust system - Google Patents
A flexible fixing bracket for exhaust systemInfo
- Publication number
- CN117227958B CN117227958B CN202311234274.2A CN202311234274A CN117227958B CN 117227958 B CN117227958 B CN 117227958B CN 202311234274 A CN202311234274 A CN 202311234274A CN 117227958 B CN117227958 B CN 117227958B
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- units
- auxetic
- strips
- flexible fixing
- fixing bracket
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Abstract
本发明公开了一种排气系统柔性固定支架，包括固定端和凹形腹板，固定端与凹形腹板之间设有柔性固定架体，柔性固定架由多个弹性支撑单元构成；弹性支撑单元包括形变部和连接端，形变部的两端设置连接端；形变部呈U形，U形的两端为连接端，形变部内侧为形变空间，柔性固定架利用形变部补偿凹形腹板与固定端之间发生的轴向或径向偏移；该排气系统柔性固定支架的设计，解决了排气管道因受热膨胀对固定支架的巨大冲击力，使固定支架不仅具有承载管道重量的固定作用，还能吸收排气管道因受热膨胀产生的偏移量。该发明不仅提高了设计和生产效率，减少膨胀节的使用，而且生产成本较低，施工和安装方便，节约了大量时间和人力物力。
The present invention discloses a flexible fixing bracket for an exhaust system, comprising a fixed end and a concave web, with a flexible fixing bracket body disposed between the fixed end and the concave web. The flexible fixing bracket is composed of multiple elastic support units. The elastic support unit includes a deformable portion and a connecting end, with the connecting ends disposed at both ends of the deformable portion. The deformable portion is U-shaped, with both ends of the U-shape serving as connecting ends, and the inner side of the deformable portion serves as a deformation space. The flexible fixing bracket utilizes the deformable portion to compensate for axial or radial offsets between the concave web and the fixed end. The design of the flexible fixing bracket for an exhaust system addresses the significant impact of thermal expansion on the exhaust pipe, enabling the fixing bracket to not only bear the weight of the pipe but also absorb offsets caused by thermal expansion. This invention not only improves design and production efficiency and reduces the use of expansion joints, but also offers low production costs, facilitates construction and installation, and saves significant time, manpower, and material resources.
Description
Technical Field
The invention relates to the technical field of exhaust pipe supports, in particular to a flexible fixing support of an exhaust system.
Background
The exhaust system of the ship is an important component of the power of the ship, and in the design of the fixed bracket of the exhaust system of the main/auxiliary machine of the ship, the thermal expansion amount of the pipeline in the axial direction and the radial direction is large because the temperature and the diameter of the exhaust pipeline are high. Due to the limitation of cabin space, when expansion joints cannot be placed near the exhaust pipe elbow or on the straight pipe section, the fixed support at the position needs to absorb the expansion amount of the vertical pipe section and the horizontal pipe section and bear the own weight of the pipeline so as to ensure the stability of the exhaust system. The form of the fixing support in the current market does not meet the conditions, and the design difficulty is greatly increased.
In the prior art, for example, (application number CN 202020916466.7) is a ship exhaust pipe vibration damper, which belongs to the technical field of exhaust pipe vibration damper equipment. The exhaust pipe vibration absorber comprises a bottom plate, two second supporting plates, a first sliding plate, a fixing mechanism and a buffer mechanism, wherein the first supporting plates are vertically and fixedly arranged on the upper side surface of the bottom plate, the two second supporting plates are parallel to each other and are respectively positioned on two sides of the width direction of the bottom plate, the first sliding plate is horizontally and slidingly arranged between the two second supporting plates, the fixing mechanism is arranged on one side, far away from the first supporting plates, of the first sliding plate, the fixing mechanism can fix the side wall of the exhaust pipe, the buffer mechanism is arranged on the bottom plate, and the buffer mechanism can limit the sliding range of the first sliding plate and absorb vibration energy of the exhaust pipe. Although this device can have the effect of compensating the movement amount of the exhaust duct in the movement direction of the first slide plate, it is limited to compensating in this direction, and cannot realize the effect of compensation or shock absorption in other directions, resulting in poor use effect.
Therefore, the design of the flexible fixing bracket of the exhaust system is crucial, the flexible fixing bracket can be used for special exhaust areas, the fixing effect of the fixing bracket can be met, the effect of absorbing axial and radial thermal expansion of the expansion joint is also included, the design difficulty is reduced, the use of the expansion joint can be reduced, and the ship manufacturing cost is saved.
In view of the above, it is necessary to provide a flexible fixing bracket for an exhaust system to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problems and provides a flexible fixing bracket of an exhaust system.
In order to achieve the purpose, the flexible fixing bracket of the exhaust system comprises a fixed end and a concave web, wherein the fixed end is fixedly connected with a ship body, the concave web is used for being connected with an exhaust pipeline, a flexible fixing bracket body is arranged between the fixed end and the concave web, and the flexible fixing bracket is composed of a plurality of elastic supporting units;
The elastic supporting unit comprises a deformation part and connecting ends, wherein the connecting ends are arranged at two ends of the deformation part, and the connecting ends at two sides are respectively fixedly connected with the fixed end and the concave web;
The deformation space is internally provided with cellular auxetic parts which are arranged in two dimensions.
Further, the flexible fixing frame body is provided with elastic supporting units symmetrically arranged on an XOZ plane, U-shaped openings of the elastic supporting units on two sides are oppositely arranged, and the elastic supporting units on any side are provided with two layers which are divided into an elastic inner ring and an elastic outer ring.
Further, the elastic supporting units which are symmetrically arranged in a double layer are also arranged in a YOZ plane which is orthogonal to the XOZ plane, and the elastic supporting units around the elastic supporting units are symmetrically arranged along the axis O-O' which is intersected by the XOZ and the YOZ as the center of the axis.
Further, the auxetic portion includes a plurality of parallel direction setting's horizontal auxetic strip and vertical auxetic strip, horizontal auxetic strip all is sinusoidal with vertical auxetic strip, makes horizontal auxetic strip and the crisscross square cellular structure of constitution that sets up of vertical auxetic strip each other, the tip of horizontal auxetic strip, vertical auxetic strip all with deformation space's inner wall fixed connection.
Further, the connection points of the transverse auxetic strips and the longitudinal auxetic strips which are staggered are hinged by taking the staggered points as the center.
Further, draw expansion shaft is equipped with in the intersection department along O-O 'axis of the portion that draws on XOZ plane and YOZ plane respectively, draw expansion shaft includes connecting element and tie-in ligament, connecting element is equipped with a plurality of pieces along O-O' axis range upon range of, and two adjacent connecting element are connected through the tie-in ligament, connecting element is the slice that the level set up, and its periphery is connected with the portion that draws that the circumference set up.
Further, the connecting units are in a circular ring shape, the connecting ligaments are ligament units in an elliptic structure, two ligament units which are arranged in a staggered mode are arranged between two adjacent connecting units, the midpoints of long axes of the two ligament units are in X-shaped crossed arrangement, and long axis end parts of the ligament units are fixedly connected with the connecting units on two sides.
Further, the sinusoidal curves of the transverse auxetic strips and the longitudinal auxetic strips are respectively arranged at the positions of the wave crests and the wave troughs correspondingly.
Further, the elastic supporting unit is formed by bending a plate-type spring piece.
Compared with the prior art, the flexible fixing support for the exhaust system has the beneficial effects that the design of the flexible fixing support for the exhaust system solves the problem that the exhaust pipeline has huge impact force on the fixing support due to thermal expansion, so that the fixing support not only has the fixing function of bearing the weight of the pipeline, but also can absorb the offset of the exhaust pipeline due to thermal expansion. The invention not only improves the design and production efficiency and reduces the use of expansion joints, but also has lower production cost, convenient construction and installation and saves a great deal of time, manpower and material resources.
Drawings
FIG. 1 is a schematic view of an exhaust system flexible fixing bracket to exhaust pipe erection structure according to the present application;
FIG. 2 is an isometric view of an auxetic portion disposed within a flexible mounting bracket of the exhaust system;
FIG. 3 is a schematic structural view of an auxetic portion;
FIG. 4 is a schematic view showing a structure in which the elastic supporting unit and the auxetic portion are provided in two directions;
FIG. 5 is a schematic view of the longitudinal section of FIG. 4;
FIG. 6 is a schematic diagram of the structure of a pull-expansion shaft;
FIG. 7 is a schematic diagram of a unit construction in a pull-expansion shaft;
the drawing comprises a fixed end, a concave web, a flexible fixing frame body, an elastic supporting unit, a deformation space, an auxetic part, a transverse auxetic strip, a longitudinal auxetic strip, a stretching shaft, a connecting unit and a connecting ligament, wherein the fixed end, the concave web, the flexible fixing frame body, the elastic supporting unit, the deformation space, the auxetic part, the transverse auxetic strip, the longitudinal auxetic strip, the stretching shaft, the connecting unit and the connecting ligament are arranged in the drawing.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments.
Embodiment one:
A flexible fixing support of an exhaust system is shown in fig. 1, and comprises a fixing end 1 and a concave web plate 2, wherein the fixing end 1 is fixedly connected with a ship body, the concave web plate 2 is used for being connected with an exhaust pipeline, the fixing end 1 can enable a fixing frame body welded by C-shaped steel to be fixedly connected with the ship body, the concave web plate 2 at the other end is used for supporting and fixing the exhaust pipeline, a hoisting installation structure is shown in fig. 1 a, it is understood that the concave web plate 2 is fixedly connected with the exhaust pipeline, full-welded connection can be achieved, and the exhaust pipeline can be fixed with the structure by adopting a pipe hoop and other structures, and a supporting installation structure is shown in fig. 1 b.
In order to compensate the radial or axial offset of the exhaust pipe, a flexible fixing frame body 3 is arranged between the fixing end 1 and the concave web 2, the flexible fixing frame is composed of a plurality of elastic supporting units 4, as shown in fig. 2, the flexible fixing frame body 3 is the elastic supporting units 4 symmetrically arranged on the XOZ plane, U-shaped openings of the elastic supporting units 4 on two sides are oppositely arranged, two layers of elastic supporting units 4 on any side are arranged, the elastic supporting units 4 comprise deformation parts and connecting ends, and as shown in the fig. 2, the elastic supporting units 4 are formed by bending plate-type spring pieces.
The deformation part is U-shaped, the two ends of the U-shape are connecting ends, the inner side of the deformation part is a deformation space 5, in the implementation, as shown in figure 1, the deformation space 5 is hollow, four elastic supporting units 4 are connected and arranged between the fixed end 1 and the concave web 2, the four elastic supporting units 4 are symmetrical in pairs, and the U-shaped deformation part is divided into an inner layer and an outer layer, namely an elastic inner ring and an elastic outer ring.
The flexible fixing frame compensates axial or radial offset between the concave web 2 and the fixed end 1 by using the deformation part, when the exhaust pipe is displaced in the X-axis direction, the flexible fixing frame can perform longer stroke compensation, and similarly, when the exhaust pipe is offset in the Y-axis direction, the flexible fixing frame is processed by adopting the elastic reed, so that certain stroke compensation can be performed in the Y-axis direction, the device has better compensation effects on the axial direction and the radial direction of the exhaust pipe, and in the embodiment, the flexible fixing and adding are arranged on the XOZ plane, so that the device has lower thickness, and is suitable for the condition that the exhaust pipes are mutually close to each other.
Embodiment two:
In the first embodiment, due to the lack of connection or support in the deformation space 5, the deformation space is easy to fall and stretch under the influence of the weight of a pipeline when being installed as shown in a mode in fig. 1, and is easy to be pressed down by the weight of the pipeline to form compression when being installed as shown in a mode b in fig. 1, so that the flexible fixing frame of the device keeps good supporting performance when being supported or stretched, and the compensation capability for axial and radial displacement of an exhaust pipe is not influenced. Specifically, cellular auxetic portions 6 arranged in two dimensions are provided in the deformation space 5.
As shown in fig. 2, four elastic supporting units 4 are disposed in the XOZ plane, and an auxetic portion 6 is disposed in the deformation space 5 in the middle, where the auxetic portion 6 includes a plurality of lateral auxetic strips 7 disposed in parallel directions and a longitudinal auxetic strip 8, and in order to make the lateral auxetic strips 7 and the longitudinal auxetic strips 8 have better supporting and stretching deformation compensation capabilities, the lateral auxetic strips 7 and the longitudinal auxetic strips 8 are sinusoidal, in practical use, the lateral auxetic strips 7 and the longitudinal auxetic strips 8 may be made of the same elastic reed material as the elastic supporting units 4, and because the elastic reeds of the auxetic portion 6 are made of a thinner spring leaf material than the elastic supporting units 4 due to the arrangement of the auxetic portion 6, and in order to make the embodiment have better axial movement compensation capabilities, in practical use, the widths of the lateral auxetic strips 7 and the longitudinal auxetic strips 8 are preferably not set to be wider.
As shown in FIG. 2, the transverse auxetic strips 7 and the longitudinal auxetic strips 8 are mutually staggered to form a square honeycomb structure, the end parts of the transverse auxetic strips 7 and the longitudinal auxetic strips 8 are fixedly connected with the inner wall of the deformation space 5, and the sinusoidal curves of the transverse auxetic strips 7 and the longitudinal auxetic strips 8 are arranged correspondingly to the wave crest and the wave trough. In actual use, since the set auxetic portion 6 fills the deformation space 5, when lifting or supporting installation is performed as shown in fig. 1, the longitudinal supporting performance can be improved by the longitudinal auxetic strip 8, as shown in fig. 3, and since the transverse auxetic strip 7 and the longitudinal auxetic strip 8 are both in sine shape, they have better stretching or compression performance, so that the supporting performance is better, and since the transverse auxetic strip 7 and the longitudinal auxetic strip 8 enclose a quadrilateral structure, the deformation performance of the quadrilateral is utilized, so that the auxetic portion 6 in this embodiment can obtain better axial offset compensation capability.
In actual use, the transverse auxetic strips 7 and the longitudinal auxetic strips 8 can be mutually staggered and spliced, and mutually hinged structures are formed at staggered splicing points, so that deformation is facilitated. The connection points of the transverse auxetic strips 7 and the longitudinal auxetic strips 8 which are staggered are hinged by taking the staggered points as the center. The fixed connection can be formed at the staggered points by electric welding, and the structure is stronger during electric welding, but the staggered points are inconvenient to realize hinging rotation, but the quadrangle shape change of the transverse auxetic strip 7 and the longitudinal auxetic strip 8 can still be realized by utilizing the sine shape change of the transverse auxetic strip 7 and the longitudinal auxetic strip 8, so that the axial or radial offset compensation function is obtained.
Embodiment III:
the embodiment is further improved on the basis of the second embodiment, as shown in fig. 4, two layers of symmetrically arranged elastic supporting units 4 are also arranged in a YOZ plane orthogonal to the XOZ plane, and the surrounding elastic supporting units 4 are arranged in a central symmetry manner along an axis O-O' intersecting the XOZ and the YOZ. As shown in the figure, eight elastic supporting units 4 are provided around the O-O 'axis, and are distributed in a group every two, and are uniformly and alternately distributed in four directions of the O-O' axis, so that the whole flexible fixing frame body 3 can obtain better supporting or connecting performance, and the supporting and fixing of the exhaust pipe with larger mass can be effectively improved.
In the first embodiment, the four elastic support units 4 arranged in the X-axis direction can provide better displacement compensation for the axial direction of the exhaust pipe and has better resetting effect, but the resetting capability in the Y-axis direction is weaker, so the elastic support units 4 are also arranged in the Y-axis direction, namely the YOZ plane, in the embodiment, so that the fixing support can obtain better resetting effect in the axial direction or the radial direction of the exhaust pipe, and it can be understood that the fixing support also has better displacement compensation and resetting capability for the exhaust pipe with heavy weight due to the increased number of the elastic support units 4.
Embodiment four:
On the basis of the third embodiment, as shown in fig. 4, the deformation space 5 in the third embodiment is empty, as in the second embodiment, an auxetic portion 6 is disposed in the deformation space 5 in the third embodiment, and the auxetic portion 6 has substantially the same structure, for example, the lateral auxetic strips 7 and the longitudinal auxetic strips 8 are all sinusoidal, so that the lateral auxetic strips 7 and the longitudinal auxetic strips 8 are mutually staggered to form a square honeycomb structure, and the ends of the lateral auxetic strips 7 and the longitudinal auxetic strips 8 are fixedly connected with the inner wall of the deformation space 5.
The difference is that at the O-O ' axis where the two planes meet, specifically, as shown in fig. 4 and 5, the expansion shaft 9 is disposed at the intersection of the XOZ plane and the YOZ plane at the expansion portion 6 along the O-O ' axis, and it is understood that the periphery of the expansion shaft 9 is connected with the expansion portions 6 disposed on four sides, the expansion shaft 9 includes a connection unit 10 and a connection ligament 11, as shown in fig. 6, the connection unit 10 is laminated with a plurality of pieces along the O-O ' axis, two adjacent connection units 10 are connected by the connection ligament 11, the connection unit 10 is in a sheet shape disposed horizontally, and the periphery of the connection unit is connected with the expansion portions 6 disposed circumferentially. The connecting units 10 are connected through the connecting ligaments 11 at intervals, so that the auxetic part 6 has deformation capability of deflecting along the X axis or the Y axis, the auxetic parts 6 in four directions can be connected, the mutual displacement of the auxetic parts 6 is compensated, and further, the structure of the embodiment has better torsion recovery capability due to the arrangement of the auxetic shaft 9, so that the structure has bearing and displacement recovery capability for an exhaust pipe when facing the twisting of the exhaust pipe.
As shown in fig. 7, specifically, the connection unit 10 is in a ring shape, the connection ligament 11 is a ligament unit with an oval structure, two ligament units which are staggered are arranged between two adjacent connection units 10, the midpoints of long axes of the two ligament units are in an X-shaped cross arrangement, and long axis ends of the ligament units are fixedly connected with the connection units 10 at two sides.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311234274.2A CN117227958B (en) | 2023-09-22 | 2023-09-22 | A flexible fixing bracket for exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311234274.2A CN117227958B (en) | 2023-09-22 | 2023-09-22 | A flexible fixing bracket for exhaust system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117227958A CN117227958A (en) | 2023-12-15 |
| CN117227958B true CN117227958B (en) | 2025-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311234274.2A Active CN117227958B (en) | 2023-09-22 | 2023-09-22 | A flexible fixing bracket for exhaust system |
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| Country | Link |
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| CN (1) | CN117227958B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8652602B1 (en) * | 2007-02-28 | 2014-02-18 | William Jacob Spenner Dolla | Rotational expansion auxetic structures |
| CN110274118A (en) * | 2019-07-02 | 2019-09-24 | 南通醋酸纤维有限公司 | A kind of multiple degrees of freedom conduit bracket structure |
| CN211821278U (en) * | 2020-01-14 | 2020-10-30 | 烟台大学 | Pipeline vibration damping support based on negative Poisson ratio structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3417120B2 (en) * | 1995-01-27 | 2003-06-16 | オイレス工業株式会社 | Flexible joint for automobile exhaust pipe |
| CN201954117U (en) * | 2010-12-22 | 2011-08-31 | 中冶南方工程技术有限公司 | Novel elastic support |
| CN206099626U (en) * | 2016-10-20 | 2017-04-12 | 浙江国际海运职业技术学院 | Move away to avoid possible earthquakes base and marine generator assembly of marine generator |
| CN210289892U (en) * | 2019-05-31 | 2020-04-10 | 江苏扬子鑫福造船有限公司 | Exhaust pipe support capable of bearing and absorbing thermal expansion |
| CN211819606U (en) * | 2020-03-27 | 2020-10-30 | 江南造船(集团)有限责任公司 | Host exhaust pipe support |
| CN212423434U (en) * | 2020-05-26 | 2021-01-29 | 舟山万达船舶设计有限公司 | Shock absorption device for ship exhaust pipe |
-
2023
- 2023-09-22 CN CN202311234274.2A patent/CN117227958B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8652602B1 (en) * | 2007-02-28 | 2014-02-18 | William Jacob Spenner Dolla | Rotational expansion auxetic structures |
| CN110274118A (en) * | 2019-07-02 | 2019-09-24 | 南通醋酸纤维有限公司 | A kind of multiple degrees of freedom conduit bracket structure |
| CN211821278U (en) * | 2020-01-14 | 2020-10-30 | 烟台大学 | Pipeline vibration damping support based on negative Poisson ratio structure |
Also Published As
| Publication number | Publication date |
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| CN117227958A (en) | 2023-12-15 |
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