Multi-stage stress reliever

Abstract

This invention provides a multi-segment stress relief device, relating to the field of railway engineering technology, comprising a first support, a second support, and a pitch-changing structure. The first end of the first support and the first end of the second support are respectively fixedly connected to two rail sections. The pitch-changing structure is disposed between the second ends of the first and second supports, and includes at least a plurality of uniformly spaced stiffening plates. When the two rail sections are stretched to the sides or compressed towards the center, forming a large gap change, the multiple stiffening plates disperse the large gap change into multiple smaller interval changes, thereby dispersing track stress. This invention solves the problems of stress concentration and maintenance difficulties associated with existing technologies that rely on a single expansion joint for stress relief. This invention, based on changes in tension and compression, transforms the expansion and contraction of a large expansion joint into the expansion and contraction of multiple small expansion joints, thereby effectively dispersing track stress and improving the stability and safety of seamless railway tracks.

Description

Technical Field

[0001] This invention relates to the field of railway engineering technology, and more specifically, to a multi-stage stress relief device. Background Technology

[0002] In railway track engineering, seamless tracks are widely used due to their advantages such as high smoothness and low maintenance costs. However, in actual operation, seamless tracks experience temperature stress on the rails due to changes in ambient temperature. This temperature stress increases significantly, especially when there is a large difference between the locked rail temperature and the actual rail temperature. This can lead to damage to the rail strength and track stability, and may even cause rail bulging, runaway, or rail breakage accidents.

[0003] In existing technologies, traditional stress relief methods often absorb these changes through a single expansion joint, but this approach suffers from problems such as stress concentration and maintenance difficulties.

[0004] Therefore, it is important to develop a new type of stress release device that can more effectively disperse stress. Summary of the Invention

[0005] The main objective of this invention is to provide a multi-segment stress venting device to at least solve the problems of stress concentration and maintenance difficulties that exist in the prior art when stress is vented through a single expansion joint.

[0006] To achieve the above objectives, the present invention provides a multi-segment stress relief device, which is disposed between two sections of rails spaced apart end to end. The multi-segment stress relief device includes a first support, a second support, and a pitch-changing structure. The first end of the first support and the first end of the second support are respectively fixedly connected to the two sections of rails. The pitch-changing structure is disposed between the second end of the first support and the second end of the second support, and the pitch-changing structure includes at least a plurality of stiffening plates evenly spaced apart. When the two sections of rails are stretched to the sides or squeezed to the middle to form a large gap change, the plurality of stiffening plates disperse the large gap change into a plurality of smaller interval changes to disperse the track stress.

[0007] Furthermore, both the first end of the first bracket and the first end of the second bracket are provided with connection holes, and are fixedly connected to the two sections of rails through fishplates.

[0008] Furthermore, the variable pitch structure includes a sliding shaft and multiple stiffeners; the two ends of the sliding shaft are respectively inserted into the second ends of the first support and the second ends of the second support; the two ends of the sliding shaft are respectively provided with a first sliding groove and a second sliding groove symmetrically arranged along the center of the sliding shaft; the second ends of the first support and the second ends of the second support are respectively movably engaged with the first sliding groove and the second sliding groove; multiple third sliding grooves are also provided between the first sliding groove and the second sliding groove, symmetrically distributed along the center of the sliding shaft; multiple stiffeners are movably engaged with the multiple third sliding grooves one-to-one; when the two rail sections are stretched to the sides or squeezed to the middle, the first support and the second support drive the sliding shaft to rotate through the first sliding groove and the second sliding groove, and the rotation of the sliding shaft drives the multiple stiffeners to move on the multiple third sliding grooves, so that the interval between the multiple stiffeners expands or shrinks to evenly distribute the track stress.

[0009] Furthermore, a first pin and a second pin that match the first sliding groove and the second sliding groove are respectively provided in the second end of the first support and the second end of the second support, and a third pin that matches the third sliding groove is provided on each stiffener.

[0010] Furthermore, the first sliding groove, the second sliding groove, and the third sliding groove are all streamlined structures that extend outward from the center of the sliding shaft.

[0011] Furthermore, a support bracket is also provided below the center of the sliding shaft.

[0012] Furthermore, two fixed support rods are provided between the second end of the first support and the second end of the second support, and the two fixed support rods pass through both sides of the lower part of multiple stiffening plates respectively.

[0013] This invention relates to a multi-segment stress relief device. The multi-segment stress relief device is positioned between two sections of rails spaced apart end-to-end. It includes a first support, a second support, and a pitch-changing structure. The first end of the first support and the first end of the second support are fixedly connected to the two rail sections, respectively. The pitch-changing structure is positioned between the second ends of the first and second supports and includes at least a plurality of evenly spaced stiffening plates. When the two rail sections are stretched to the sides or compressed towards the center, creating a large gap, the stiffening plates disperse this large gap change into multiple smaller intervals, thus dispersing the track stress. This invention solves the problems of stress concentration and maintenance difficulties inherent in existing technologies that rely on a single expansion joint for stress relief.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. This invention transforms the expansion and contraction of a large expansion joint into the expansion and contraction of multiple small expansion joints based on the changes in tensile and compressive forces, thereby effectively dispersing track stress and improving the stability and safety of seamless railway tracks.

[0016] 2. This invention has a simple structure, is easy to install, and can achieve efficient and stable stress relief. Its simple structure not only reduces manufacturing costs but also improves the reliability and ease of maintenance of the equipment.

[0017] 3. This invention can be used in the expansion joint regulator of seamless line expansion joints to reduce costs and maintenance complexity. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of a multi-stage stress venting device;

[0020] Figure 2 This is an exploded view of a multi-stage stress relief device;

[0021] Figure 3 This is a schematic diagram of the sliding shaft.

[0022] The above figures include the following reference numerals:

[0023] 10. First support; 20. Second support; 30. Variable pitch structure; 31. Sliding shaft; 311. First sliding groove; 312. Second sliding groove; 313. Third sliding groove; 32. Rib plate; 40. Support bracket; 50. Fixed support rod. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figure 1As shown, this invention provides a multi-segment stress venting device. The multi-segment stress venting device is installed between two sections of rails spaced apart end-to-end. The device includes a first support 10, a second support 20, and a variable-pitch structure 30. The first end of the first support 10 and the first end of the second support 20 are fixedly connected to the two rail sections, respectively. The variable-pitch structure 30 is located between the second ends of the first support 10 and the second ends of the second support 20, and includes at least a plurality of evenly spaced stiffening plates 32. When the two rail sections are stretched to the sides or compressed towards the center, forming a large gap change, the multiple stiffening plates 32 disperse the large gap change into multiple smaller interval changes, thereby dispersing track stress. This invention solves the problems of stress concentration and maintenance difficulties associated with stress venting using a single expansion joint in existing technologies. This invention, based on changes in tension and compression, transforms the expansion and contraction of a large expansion joint into the expansion and contraction of multiple small expansion joints, thereby effectively dispersing track stress and improving the stability and safety of seamless railway lines. This invention has a simple structure, is easy to install, and can achieve efficient and stable stress venting. Its simple structure not only reduces manufacturing costs but also improves the reliability and ease of maintenance of the equipment.

[0026] As an optimized solution of the present invention, such as Figure 1 and Figure 2 As shown, both the first end of the first bracket 10 and the first end of the second bracket 20 are provided with connecting holes, and are fixedly connected to the two sections of steel rails through fishplates. Preferably, there are two connecting holes.

[0027] As an optimized solution of the present invention, such as Figure 2 and Figure 3 As shown, the variable pitch structure 30 includes a sliding shaft 31 and multiple stiffeners 32. The two ends of the sliding shaft 31 are respectively inserted into the second ends of the first support 10 and the second support 20. The two ends of the sliding shaft 31 are respectively provided with a first sliding groove 311 and a second sliding groove 312 symmetrically distributed along the center of the sliding shaft 31. The second ends of the first support 10 and the second support 20 are respectively movably engaged with the first sliding groove 311 and the second sliding groove 312. Multiple third sliding grooves 313 are also provided between the first sliding groove 311 and the second sliding groove 312, symmetrically distributed along the center of the sliding shaft 31. Multiple stiffeners 32 are movably engaged with the multiple third sliding grooves 313. When the two rail sections are stretched to the sides or squeezed towards the center, the first support 10 and the second support 20 drive the sliding shaft 31 to rotate through the first sliding groove 311 and the second sliding groove 312. The rotation of the sliding shaft 31 causes the multiple stiffeners 32 to move on the multiple third sliding grooves 313, thereby expanding or shrinking the interval between the multiple stiffeners 32 to evenly distribute the track stress. Preferably, the second end of the first bracket 10 and the second end of the second bracket 20 are both provided with mounting holes that match the diameter of the sliding shaft 31.

[0028] As an optimized solution of the present invention, such as Figure 2 and Figure 3 As shown, the second end of the first bracket 10 and the second end of the second bracket 20 are respectively provided with a first pin and a second pin that match the first sliding groove 311 and the second sliding groove 312, and each stiffener 32 is provided with a third pin that matches the third sliding groove 313. Preferably, as shown... Figure 2 As shown, the pins can be inserted into the pin holes opened on the first bracket 10, the second bracket 20 and each stiffener 32, or they can be manufactured as a single piece.

[0029] As an optimized solution of the present invention, such as Figure 2 and Figure 3 As shown, the first sliding groove 311, the second sliding groove 312, and the third sliding groove 313 are all streamlined structures extending outward from the center of the sliding shaft 31. Preferably, as... Figure 3 As shown, the first sliding groove 311 and the second sliding groove 312 have a longer extension length than the third sliding groove 313 to accommodate pressure or tension under various conditions.

[0030] As an optimized solution of the present invention, such as Figure 2 As shown, a support 40 is also provided below the middle of the sliding shaft 31. Preferably, the support 40 is used to support the sliding shaft 31 to ensure its stability during operation.

[0031] As an optimized solution of the present invention, such as Figure 2 As shown, two fixed support rods 50 are also provided between the second end of the first bracket 10 and the second end of the second bracket 20. The two fixed support rods 50 pass through both sides of the lower part of the plurality of stiffening plates 32. Preferably, the two fixed support rods 50 are respectively provided on both sides of the sliding shaft 31. The two fixed support rods 50 and the sliding shaft 31 are used to make the plurality of stiffening plates 32 move axially along the sliding shaft 31, playing a supporting and guiding role.

[0032] As an optimized solution of the present invention, the working principle of the present invention is described in detail below:

[0033] When the tension of the rails on both sides is transmitted to the first support 10 or the second support 20, the first pin or the second pin in the second end of the first support 10 or the second support 20 pulls the sliding shaft 31 through the first sliding groove 311 or the second sliding groove 312. Due to the guide curve of the first sliding groove 311 or the second sliding groove 312 of the sliding shaft 31, the sliding shaft 31 rotates in the forward direction. When the sliding shaft 31 rotates in the forward direction, the third sliding groove 313 also rotates, thereby driving multiple stiffening plates 32 to move on multiple third sliding grooves 313, driving multiple stiffening plates 32 to move along the axial direction of the sliding shaft 31, and the interval between multiple stiffening plates 32 widens.

[0034] When the pressure from the two rails is transmitted to the first support 10 or the second support 20, the first pin or the second pin in the second end of the first support 10 or the second support 20 pulls the sliding shaft 31 through the first sliding groove 311 or the second sliding groove 312. Due to the guide curve of the first sliding groove 311 or the second sliding groove 312 of the sliding shaft 31, the sliding shaft 31 rotates in the opposite direction. When the sliding shaft 31 rotates in the opposite direction, the third sliding groove 313 also rotates, thereby driving multiple stiffeners 32 to move on multiple third sliding grooves 313, driving multiple stiffeners 32 to move axially along the sliding shaft 31, and reducing the interval between multiple stiffeners 32.

[0035] This invention transforms the expansion and contraction of a large expansion joint into the expansion and contraction of multiple small expansion joints based on changes in tensile and compressive forces, thereby effectively dispersing track stress and improving the stability and safety of seamless railway tracks.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-stage stress relief device, characterized in that, The multi-segment stress relief device is installed between two sections of rails spaced apart at their ends, and includes: The first support (10) and the second support (20) are fixedly connected to the two sections of the rail respectively. A variable pitch structure (30) is disposed between the second end of the first support (10) and the second end of the second support (20), and the variable pitch structure (30) includes at least a plurality of stiffeners (32) evenly spaced apart. When the two sections of the rail are stretched to the sides or squeezed to the middle to form a large gap change, the multiple stiffeners (32) disperse the large gap change into multiple smaller interval changes to disperse the track stress. The variable pitch structure (30) includes: A sliding shaft (31) is provided at both ends, which are respectively inserted into the second ends of the first bracket (10) and the second bracket (20); a first sliding groove (311) and a second sliding groove (312) are respectively provided on both ends of the sliding shaft (31) symmetrically along the center of the middle of the sliding shaft (31); the second ends of the first bracket (10) and the second bracket (20) are respectively movably engaged with the first sliding groove (311) and the second sliding groove (312); a plurality of third sliding grooves (313) are also provided between the first sliding groove (311) and the second sliding groove (312) symmetrically distributed along the middle of the sliding shaft (31); Multiple stiffeners (32) are movably and snapped onto multiple third sliding grooves (313) in a one-to-one correspondence; When the two sections of the rail are stretched to the sides or squeezed to the middle, the first support (10) and the second support (20) drive the sliding shaft (31) to rotate through the first sliding groove (311) and the second sliding groove (312). The rotation of the sliding shaft (31) drives multiple stiffening plates (32) to move on multiple third sliding grooves (313) so that the interval between the multiple stiffening plates (32) expands or shrinks to evenly distribute the track stress. The first sliding groove (311), the second sliding groove (312) and the third sliding groove (313) are all streamlined structures that extend outward from the middle of the sliding shaft (31).

2. The multi-segment stress venting device according to claim 1, characterized in that, Both the first end of the first bracket (10) and the first end of the second bracket (20) are provided with connection holes and are fixedly connected to the two sections of the rails through fishplates.

3. The multi-segment stress venting device according to claim 2, characterized in that, The second end of the first bracket (10) and the second end of the second bracket (20) are respectively provided with a first pin and a second pin that match the first sliding groove (311) and the second sliding groove (312), and each of the stiffeners (32) is provided with a third pin that matches the third sliding groove (313).

4. The multi-segment stress venting device according to claim 2, characterized in that, A support (40) is also provided below the middle part of the sliding shaft (31).

5. The multi-segment stress venting device according to claim 1, characterized in that, Two fixed support rods (50) are provided between the second end of the first bracket (10) and the second end of the second bracket (20), and the two fixed support rods (50) pass through both sides of the lower part of the multiple stiffening plates (32).

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