Exhaust system flexible mounting bracket

Abstract

The application discloses a flexible fixing support of an exhaust system, which comprises a fixed end and a concave web, and a flexible fixing support body is arranged between the fixed end and the concave web, wherein the flexible fixing support body is composed of a plurality of elastic supporting units; each elastic supporting unit comprises a deformation part and a connecting end, and the two ends of the deformation part are provided with the connecting ends; the deformation part is in a U shape, the two ends of the U shape are the connecting ends, and the inner side of the deformation part is a deformation space; the flexible fixing support body compensates for the axial or radial offset between the concave web and the fixed end by means of the deformation part; the design of the flexible fixing support of the exhaust system solves the problem that the exhaust pipeline is subjected to a great impact force of thermal expansion on the fixing support, so that the fixing support not only has a fixing function of bearing the weight of the pipeline, but also can absorb the offset amount generated by the thermal expansion of the exhaust pipeline; the application not only improves design and production efficiency and reduces the use of expansion joints, but also has low production cost, is convenient to construct and install, and saves a large amount of time, manpower and material resources.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust pipe brackets, and in particular to a flexible fixing bracket for an exhaust system. Background Art

[0002] Ship exhaust systems are a crucial component of ship propulsion. The high temperatures and large diameters of exhaust ducts create significant axial and radial thermal expansion in the design of fixed brackets for main and auxiliary engine exhaust systems. Due to limited engine room space, expansion joints cannot be placed near exhaust pipe elbows or on straight sections. Therefore, fixed brackets in these locations must absorb the expansion of both vertical and horizontal sections while also supporting the weight of the ducts themselves to ensure exhaust system stability. Currently available fixed brackets fail to meet these requirements, significantly increasing design complexity.

[0003] In the prior art, for example (application number CN202020916466.7) a ship exhaust pipe vibration reduction device belongs to the technical field of exhaust pipe vibration reduction equipment. The utility model includes a base plate, two second support plates, a first sliding plate, a fixing mechanism and a buffer mechanism. The upper side of the base plate is vertically fixed with a first support plate, two second support plates, two second support plates are vertically fixed on the upper side of the base plate, the two second support plates are parallel to each other and are respectively located on both sides of the width direction of the base plate, the first sliding plate is horizontally slidably arranged between the two second support plates, the fixing mechanism is arranged on the side of the first sliding plate away from the first support plate, the fixing mechanism can fix the side wall of the exhaust pipe, the buffer mechanism is arranged on the base plate, the buffer mechanism can limit the sliding range of the first sliding plate, and absorb the vibration energy of the exhaust pipe. Although this device can compensate for the movement of the exhaust pipe in the direction of movement of the first slide plate, it is limited to compensation in this direction and cannot achieve compensation or vibration reduction effects in other directions, resulting in poor use effect.

[0004] Therefore, the design of a flexible fixed bracket for the exhaust system is crucial. It can be used in special exhaust areas. It can not only meet the fixing function of the fixed bracket, but also include the effect of absorbing axial and radial thermal expansion of the expansion joint, which reduces the design difficulty, reduces the use of expansion joints, and saves shipbuilding costs.

[0005] In view of the above, it is necessary to propose a flexible fixing bracket for an exhaust system to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the above technical problems and provide a flexible fixing bracket for an exhaust system.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a flexible fixing bracket for an exhaust system, comprising a fixed end and a concave web, wherein the fixed end is fixedly connected to the hull, the concave web is used to connect to the exhaust pipe, and a flexible fixing frame body is provided between the fixed end and the concave web, the flexible fixing frame being composed of a plurality of elastic support units;

[0008] The elastic support unit includes a deformable portion and a connecting end. The connecting ends are provided at both ends of the deformable portion, and the connecting ends on both sides are fixedly connected to the fixed end and the concave web respectively. The deformable portion is U-shaped, and the two ends of the U are connecting ends. The inner side of the deformable portion is a deformation space. The flexible fixing frame uses the deformable portion to compensate for the axial or radial offset between the concave web and the fixed end.

[0009] The deformation space is provided with honeycomb-shaped expansion parts arranged in two-dimensional directions.

[0010] Furthermore, the flexible fixing frame is an elastic support unit symmetrically arranged on the XOZ plane, the U-shaped openings of the elastic support units on both sides are arranged oppositely, and the elastic support unit on either side has two layers, which are divided into an elastic inner ring and an elastic outer ring.

[0011] Furthermore, a double layer of symmetrically arranged elastic support units are also provided in the YOZ plane orthogonal to the XOZ plane, and the elastic support units on all sides are symmetrically arranged along the axis OO' where the XOZ and YOZ intersect.

[0012] Furthermore, the expansion part includes a number of transverse expansion bars and longitudinal expansion bars arranged in parallel directions, and the transverse expansion bars and longitudinal expansion bars are both sinusoidal, so that the transverse expansion bars and longitudinal expansion bars are staggered with each other to form a square honeycomb structure, and the ends of the transverse expansion bars and longitudinal expansion bars are fixedly connected to the inner wall of the deformation space.

[0013] Furthermore, the intersection points of the transverse expansion strips and the longitudinal expansion strips are hingedly connected with the intersection points as the center.

[0014] Furthermore, an expansion axis is provided at the intersection of the expansion parts on the XOZ plane and the YOZ plane along the O-O' axis. The expansion axis includes a connecting unit and a connecting ligament. The connecting unit is stacked with a plurality of sheets along the O-O' axis, and two adjacent connecting units are connected by a connecting ligament. The connecting unit is in the shape of a horizontal sheet, and its four sides are connected to the expansion part arranged circumferentially.

[0015] Furthermore, the connecting unit is in the shape of a ring, the connecting ligament is an elliptical ligament unit, two ligament units are arranged alternately between two adjacent connecting units, the midpoints of the long axes of the two ligament units are arranged in an X-shape, and the long axis ends of the ligament units are fixedly connected to the connecting units on both sides.

[0016] Furthermore, the sinusoidal curves of the transverse expansion strips and the longitudinal expansion strips are arranged with the crests and troughs corresponding to each other.

[0017] Furthermore, the elastic support unit is formed by bending a plate spring.

[0018] Compared with existing technologies, the present invention offers the following advantages: the design of this flexible exhaust system bracket mitigates the significant impact of thermal expansion on the exhaust pipe, enabling the bracket to not only support the pipe's weight but also absorb the deflection caused by thermal expansion. This invention not only improves design and production efficiency, reducing the need for expansion joints, but also offers lower production costs, facilitates construction and installation, and saves significant time, manpower, and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the exhaust pipe installation using a flexible fixing bracket of an exhaust system in this application;

[0020] Figure 2 Axonometric drawing of the auxetic expansion section within the flexible fixing bracket of the exhaust system;

[0021] Figure 3 Schematic diagram of the structure of the expansion part;

[0022] Figure 4 The structure of the elastic support unit and the traction part in two directions is a schematic diagram;

[0023] Figure 5 for Figure 4 Schematic diagram of the structure of the middle longitudinal section;

[0024] Figure 6 Schematic diagram of the structure of the auxetic shaft;

[0025] Figure 7 A schematic diagram of a unit structure in an auxetic shaft;

[0026] In the figure: 1. Fixed end; 2. Concave web; 3. Flexible fixed frame; 4. Elastic support unit; 5. Deformation space; 6. Expansion part; 7. Horizontal expansion strip; 8. Longitudinal expansion strip; 9. Expansion axis; 10. Connecting unit; 11. Connecting ligament. DETAILED DESCRIPTION

[0027] The technical solutions of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0028] Example 1:

[0029] A flexible fixing bracket for an exhaust system, such as Figure 1 As shown, it includes a fixed end 1 and a concave web 2. The fixed end 1 is fixedly connected to the hull, and the concave web 2 is used to connect to the exhaust pipe. The fixed end 1 can be a fixed frame welded with C-shaped steel as shown in the figure, which is used to be fixedly connected to the hull. The concave web 2 at the other end is used to support and fix the exhaust pipe. Figure 1 The figure a shows a hoisting installation structure. It can be understood that the concave web 2 is fixedly connected to the exhaust pipe at this time. It can be a full weld connection or a structure such as a pipe clamp can be used to fix the exhaust pipe thereto. Figure 1 The support installation structure is shown in b.

[0030] In order to compensate for the radial or axial offset of the exhaust pipe, specifically, a flexible fixing frame 3 is provided between the fixed end 1 and the concave web 2, and the flexible fixing frame is composed of a plurality of elastic support units 4; Figure 2 As shown, the flexible fixed frame 3 is an elastic support unit 4 symmetrically arranged on the XOZ plane, the U-shaped openings of the elastic support units 4 on both sides are arranged opposite to each other, and the elastic support unit 4 on any side is provided with two layers. The elastic support unit 4 includes a deformation portion and a connecting end. As shown in the figure, the elastic support unit 4 is formed by bending a plate spring sheet.

[0031] The two ends of the deformation part are provided with connecting ends, and the connecting ends on both sides are fixedly connected to the fixed end 1 and the concave web 2 respectively; the deformation part is U-shaped, and the two ends of the U are connecting ends. The inner side of the deformation part is a deformation space 5. In this embodiment, Figure 1 As shown, the interior of the deformation space 5 is hollow, and four elastic support units 4 are connected between the fixed end 1 and the concave web 2. Moreover, the four elastic support units 4 are symmetrical in pairs, and the U-shaped deformation parts are relatively arranged and divided into two layers, specifically an elastic inner ring and an elastic outer ring.

[0032] The flexible fixing frame utilizes the deformation portion to compensate for the axial or radial offset between the concave web 2 and the fixed end 1; when the exhaust pipe is displaced in the X-axis direction, the flexible fixing frame can compensate for a longer stroke; similarly, when an offset occurs in the Y-axis direction, since the elastic reed is processed, a certain stroke compensation can also be achieved in the Y-axis direction; thereby, the device can have a better compensation effect on the axial and radial directions of the exhaust pipe, and in this embodiment, the flexible fixing frame is provided in the XOZ plane, so that the device can have a lower thickness, thereby being able to adapt to the situation where the exhaust pipes are installed close to each other.

[0033] Example 2:

[0034] This embodiment improves the first embodiment. In the first embodiment, due to the lack of connection or support in the deformation space 5, when Figure 1 When installing as shown in a, it is easy to fall and stretch due to the weight of the pipe; if Figure 1 When installed in method B, the pipe is also susceptible to compression due to downward pressure from the pipe's weight. Therefore, to ensure that the flexible mounting bracket maintains good support performance during both support and tension, and does not compromise its ability to compensate for axial and radial displacement of the exhaust pipe, the deformation space 5 is provided with a honeycomb-shaped extrudence portion 6 arranged in two dimensions.

[0035] like Figure 2 As shown, four elastic support units 4 are provided in the XOZ plane, and an expansion portion 6 is provided in the deformation space 5 in the middle, and the expansion portion 6 includes a number of transverse expansion bars 7 and longitudinal expansion bars 8 arranged in parallel directions. In order to make the transverse expansion bars 7 and the longitudinal expansion bars 8 have better support and tensile deformation compensation capabilities, the transverse expansion bars 7 and the longitudinal expansion bars 8 are both sinusoidal. In actual use, the transverse expansion bars 7 and the longitudinal expansion bars 8 can be made of the same elastic spring material as the elastic support unit 4. Since the setting of the expansion portion 6 increases the density of the support structure, the elastic spring of the expansion portion 6 can be made of a spring material thinner than that of the elastic support unit 4. In order to make this embodiment have better axial movement compensation capability, in actual use, the width of the transverse expansion bars 7 and the longitudinal expansion bars 8 should not be set too wide.

[0036] like Figure 2 As shown, the transverse expansion strips 7 and the longitudinal expansion strips 8 are arranged in an interlaced manner to form a quadrilateral honeycomb structure. The ends of the transverse expansion strips 7 and the longitudinal expansion strips 8 are fixedly connected to the inner wall of the deformation space 5. The sinusoidal curves of the transverse expansion strips 7 and the longitudinal expansion strips 8 are arranged at corresponding peaks and troughs. In actual use, the expansion portion 6 fills the deformation space 5, so that when performing the following operations, Figure 1When the hoisting or supporting installation is shown, the longitudinal support performance can be improved by longitudinal expansion strips 8, such as Figure 3 As shown, and since the transverse expansion strips 7 and the longitudinal expansion strips 8 are both arranged in a sinusoidal shape, they have better tensile or compression performance, so the support they provide is better. Since the transverse expansion strips 7 and the longitudinal expansion strips 8 form a quadrilateral structure, the deformation performance of the quadrilateral can also be used to enable the expansion portion 6 in this embodiment to obtain better axial offset compensation capability.

[0037] In actual use, the transverse and longitudinal flexural bars 7, 8 can be interlaced and interlocked, forming a hinged structure at the interlaced points to facilitate deformation. The interlaced connection points of the transverse and longitudinal flexural bars 7, 8 are hinged about the interlaced points. Alternatively, the interlaced points can be welded to form a fixed connection, which offers the advantage of a stronger structure. However, the interlaced points are not easily hinged. However, by utilizing the sinusoidal shape changes of the transverse and longitudinal flexural bars 7, 8, a quadrilateral shape change can still be achieved, thereby providing axial or radial offset compensation.

[0038] Example 3:

[0039] This embodiment is further improved on the basis of the second embodiment. Figure 4 As shown, a double layer of symmetrically arranged elastic support units 4 is also provided in the YOZ plane, which is orthogonal to the XOZ plane. These elastic support units 4 are symmetrically arranged around the axis O-O', where the XOZ and YOZ intersect. As shown in the figure, eight elastic support units 4 are provided around the O-O' axis, with each group of two being evenly spaced in the four directions of the O-O' axis. This ensures better support or connection performance for the entire flexible fixing frame 3, effectively improving the support and fixation of large exhaust pipes.

[0040] Since in Example 1, the four elastic support units 4 arranged in the X-axis direction can provide better displacement compensation for the exhaust pipe axial direction and have a better reset effect; but its reset ability in the Y-axis direction is weak, this embodiment also arranges elastic support units 4 in the Y-axis direction, i.e., the YOZ plane, so that the fixed bracket can obtain better reset effect in the axial or radial direction of the exhaust pipe. It can be understood that due to the increase in the number of elastic support units 4, it also has better displacement compensation and reset ability for heavy exhaust pipes.

[0041] Example 4:

[0042] Based on the third embodiment, Figure 4As shown, the deformation space 5 in the third embodiment is empty. Similar to the second embodiment, an expansion portion 6 is provided in the deformation space 5 of the third embodiment, and the structure of the expansion portion 6 is basically the same. For example, the transverse expansion strips 7 and the longitudinal expansion strips 8 are both sinusoidal, so that the transverse expansion strips 7 and the longitudinal expansion strips 8 are staggered to form a square honeycomb structure, and the ends of the transverse expansion strips 7 and the longitudinal expansion strips 8 are fixedly connected to the inner wall of the deformation space 5.

[0043] The difference is that at the O-O' axis where the two planes intersect, specifically, Figure 4 、 Figure 5 As shown, the auxetic parts 6 on the XOZ plane and the YOZ plane are respectively provided with an auxetic shaft 9 at the intersection along the O-O' axis. It can be understood that the auxetic shaft 9 is connected to the auxetic parts 6 arranged on four sides. The auxetic shaft 9 includes a connecting unit 10 and a connecting ligament 11. Figure 6 As shown, the connecting units 10 are stacked in a plurality of layers along the O-O' axis, with adjacent connecting units 10 connected by connecting ligaments 11. The connecting units 10 are horizontally arranged sheets, connected around their perimeters to the circumferentially arranged auxetic sections 6. Due to the spacing between the connecting units 10 and their connection via the connecting ligaments 11, the auxetic sections 6 have the ability to deform along the X-axis or Y-axis, thereby connecting the auxetic sections 6 in four directions and compensating for displacement between them. Furthermore, the provision of the auxetic axis 9 provides excellent torsional recovery, enabling this embodiment to support and recover the exhaust pipe's displacement when the exhaust pipe is twisted.

[0044] like Figure 7 As shown, specifically, the connecting unit 10 is in a circular shape, the connecting ligament 11 is a ligament unit with an elliptical structure, and two ligament units are arranged in an alternating manner between two adjacent connecting units 10. The midpoints of the long axes of the two ligament units are arranged in an X-shape, and the long axis ends of the ligament units are fixedly connected to the connecting units 10 on both sides.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A flexible fixing bracket for an exhaust system, comprising a fixed end (1) and a concave web (2), wherein the fixed end (1) is fixedly connected to the hull, and the concave web (2) is used to connect to the exhaust pipe, characterized in that: A flexible fixing frame (3) is provided between the fixed end (1) and the concave web (2), and the flexible fixing frame is composed of a plurality of elastic support units (4); The elastic support unit (4) comprises a deformation portion and a connection end, the connection ends being provided at both ends of the deformation portion, and the connection ends on both sides being fixedly connected to the fixed end (1) and the concave web (2) respectively; the deformation portion is U-shaped, the two ends of the U-shape being connection ends, the inner side of the deformation portion being a deformation space (5), and the flexible fixed frame body utilizing the deformation portion to compensate for the axial or radial offset between the concave web (2) and the fixed end (1); The deformation space (5) is provided with honeycomb-shaped expansion parts (6) arranged in two dimensions; The flexible fixed frame (3) is an elastic support unit (4) symmetrically arranged on the XOZ plane, the U-shaped openings of the elastic support units (4) on both sides are arranged opposite to each other, and the elastic support unit (4) on either side is provided with two layers, which are divided into an elastic inner ring and an elastic outer ring; A double-layer symmetrically arranged elastic support unit (4) is also provided in the YOZ plane orthogonal to the XOZ plane, and the elastic support units (4) on all sides are symmetrically arranged along the axis O-O' where the XOZ and YOZ intersect. The expansion portion (6) includes a plurality of transverse expansion strips (7) and longitudinal expansion strips (8) arranged in parallel directions, and the transverse expansion strips (7) and longitudinal expansion strips (8) are both in the shape of a sine curve, so that the transverse expansion strips (7) and longitudinal expansion strips (8) are staggered to form a quadrilateral honeycomb structure, and the ends of the transverse expansion strips (7) and longitudinal expansion strips (8) are fixedly connected to the inner wall of the deformation space (5); The cross-connected connection points of the transverse expansion strips (7) and the longitudinal expansion strips (8) are hingedly connected with the cross-connected points as the center. The expansion parts (6) on the XOZ plane and the YOZ plane are respectively provided with expansion shafts (9) at the intersection along the O-O' axis. The expansion shafts (9) include connecting units (10) and connecting ligaments (11). The connecting units (10) are stacked along the O-O' axis. Two adjacent connecting units (10) are connected by connecting ligaments (11). The connecting units (10) are in the form of horizontally arranged sheets, and are connected to the expansion parts (6) arranged circumferentially on all sides. The connecting unit (10) is annular, the connecting ligament (11) is an elliptical ligament unit, two ligament units are arranged staggered between two adjacent connecting units (10), the long axis midpoints of the two ligament units are arranged in an X-shaped cross, and the long axis ends of the ligament units are fixedly connected to the connecting units (10) on both sides; The sinusoidal curves of the transverse expansion strips (7) and the longitudinal expansion strips (8) are both arranged with the crests and troughs corresponding to each other.

2. The flexible fixing bracket of an exhaust system according to claim 1, characterized in that: The elastic support unit (4) is formed by bending a plate spring.

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