A bellows stretching tool

Abstract

The utility model discloses a corrugated pipe stretching frock belongs to corrugated pipe processing test equipment technical field. A corrugated pipe stretching frock, including base and symmetrical installation on base's electric guide rail, be provided with crossbeam between two groups electric guide rail, and the both ends of crossbeam are fixedly connected with the output of corresponding electric guide rail, when electric guide rail works, crossbeam moves up and down along electric guide rail operation path, still include setting up in the clamping part of base top and crossbeam bottom surface for the limit corrugated pipe end portion, the utility model discloses through the setting of L -shaped pole and clamping rod, the vertical section of L -shaped pole is pasted with corrugated pipe inner wall through arc rubber pad, and the anti -skid pad on clamping rod is pasted with corrugated pipe outer wall from outside, forms the firm clamping effect of inside and outside clamping, effectively prevents the sliding or falling of corrugated pipe in the stretching process, guarantees the stability and accuracy of stretching test.

Description

Technical Field

[0001] This utility model relates to the technical field of corrugated pipe processing and testing equipment, and in particular to a corrugated pipe tensile tooling. Background Technology

[0002] A bellows is a tubular elastic sensing element with a ring-shaped corrugated structure, widely used in petroleum, chemical, aerospace and other fields. During the production of bellows, tensile performance testing is required to ensure product quality meets requirements. Tensile testing typically involves using specialized tensile fixtures to clamp both ends of the bellows, then applying tension through tensile equipment to detect the bellows' tensile strength, elongation, and other performance parameters.

[0003] The existing clamping structure of bellows stretching fixtures has limitations. The clamping part usually uses a flat clamping block to fix the two ends of the bellows. However, since the ends of the bellows are mostly arc-shaped or cylindrical, the contact area between the flat clamping block and the bellows is significantly reduced, resulting in insufficient clamping stability and easy slippage during the stretching process, which affects the accuracy of the test results. In addition, traditional clamping blocks are mostly made of metal materials and the clamping surface is relatively smooth, which is difficult to effectively adapt to the annular corrugated structure of the bellows. Therefore, we urgently need a bellows stretching fixture to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problems of unstable clamping and poor adaptability of corrugated pipes in the prior art, and to propose a corrugated pipe stretching fixture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A bellows stretching fixture includes a base and electric guide rails symmetrically mounted on the base. A crossbeam is provided between the two sets of electric guide rails, and the two ends of the crossbeam are fixedly connected to the output ends of the corresponding electric guide rails. When the electric guide rails are working, the crossbeam moves up and down along the running path of the electric guide rails. The fixture also includes a clamping part for limiting the end of the bellows, which is provided on the top of the base and the bottom of the crossbeam. The clamping part is mainly composed of an L-shaped rod that abuts against the inner wall of the bellows and a clamping rod that abuts against the outer wall of the bellows. When the L-shaped rod and the clamping rod abut against the inner and outer walls of the bellows, a clamping area is formed.

[0006] In order to accommodate the diameter of the corrugated pipe, the clamping part preferably includes a mounting seat installed on the base and the crossbeam, and the two sets of mounting seats are arranged vertically and collinearly. The mounting seat has at least three sets of threaded holes equidistantly spaced in an annular shape to accommodate the diameter of the corrugated pipe. When the connection of the L-shaped rod is threaded into the threaded hole, a stable area is formed.

[0007] In order to clamp the outer diameter of the bellows, the L-shaped rod is further provided with an arc-shaped groove for placing the end of the bellows on its transverse surface. The clamping rod is located in the arc-shaped groove. The L-shaped rod is provided with a threaded hole II, and a screw is internally threaded into the threaded hole II. The end of the screw is rotatably connected to the corresponding side of the clamping rod. When the screw rotates, the clamping rod moves linearly along the path of the arc-shaped groove.

[0008] To improve the anti-slip performance of the inner wall of the corrugated pipe, preferably, an arc-shaped rubber pad is fixedly installed on the vertical surface of the L-shaped rod, and anti-slip protrusions are evenly arranged along the arc surface of the arc-shaped rubber pad.

[0009] To improve the anti-slip performance on the outer wall of the corrugated pipe, preferably, the clamping rod is arc-shaped, and an anti-slip pad is fixedly installed on the side of the clamping rod facing the corrugated pipe.

[0010] Preferably, a handle is fixedly installed at the end of the screw away from the clamping rod.

[0011] Compared with the prior art, the present invention provides a bellows stretching fixture, which has the following advantages: 1. This corrugated pipe stretching fixture, through the setting of L-shaped rod and clamping rod, the vertical section of the L-shaped rod is in contact with the inner wall of the corrugated pipe through the arc-shaped rubber pad, and the anti-slip pad on the clamping rod is in contact with the outer wall of the corrugated pipe from the outside, forming a stable clamping effect of internal and external clamping, effectively preventing the corrugated pipe from sliding or falling off during the stretching process, and ensuring the stability and accuracy of the tensile test.

[0012] 2. This bellows stretching fixture, through the setting of multiple sets of threaded holes, can better adapt to bellows of different diameters by changing the position of three sets of L-shaped rods, effectively improving testing efficiency.

[0013] 3. This bellows stretching fixture, through the setting of the screw, ensures that the clamping rod moves smoothly and the clamping force is controllable. The clamping tightness can be adjusted by turning the screw with a knob, making the operation convenient and labor-saving.

[0014] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model forms a stable clamping effect with internal and external clamping, effectively preventing the corrugated pipe from sliding or falling off during the stretching process, ensuring the stability and accuracy of the tensile test, and can be adapted to corrugated pipes of different diameters, improving testing efficiency and equipment adaptability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a bellows stretching fixture proposed in this utility model. Figure 2 This is a partial structural diagram of a bellows stretching fixture proposed in this utility model. Figure 1; Figure 3 This utility model proposes a bellows stretching fixture. Figure 2 Schematic diagram of partial cross-section of the structure; Figure 4 This is a partial structural diagram of a bellows stretching fixture proposed in this utility model. Figure 2 ; Figure 5 Schematic diagram of the mounting base structure of the bellows stretching fixture proposed in this utility model Figure 3 .

[0016] In the diagram: 1. Base; 2. Electric guide rail; 3. Crossbeam; 4. L-shaped rod; 5. Clamping rod; 6. Mounting seat; 7. Threaded hole one; 8. Arc-shaped groove; 9. Threaded hole two; 10. Screw; 11. Arc-shaped rubber pad; 12. Anti-slip protrusions; 13. Anti-slip pad; 14. Handle. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Example: Reference Figures 1-5 A bellows stretching fixture includes a base 1 and electrically driven guide rails 2 symmetrically mounted on the base 1. A crossbeam 3 is provided between the two sets of electrically driven guide rails 2, and the two ends of the crossbeam 3 are respectively fixedly connected to the output ends of the corresponding electrically driven guide rails 2. When the electrically driven guide rails 2 are working, the crossbeam 3 moves up and down along the running path of the electrically driven guide rails 2. Here, the electrically driven guide rails 2 are linear guide rails driven by motors. Their power supply unit and control unit are electrically connected to an external controller and power supply equipment, so that the electrically driven guide rails 2 can drive the crossbeam 3 to move 3 through external control. Figure 1 For example, the motion trajectory of the electric guide rail 2 is to move up and down along the Y-axis; It should be noted that in order to obtain tensile data, a load cell is required to accurately measure the tensile load applied to the specimen. This load cell is mounted on the crossbeam 3.

[0020] It also includes a clamping part for limiting the end of the corrugated pipe, which is set on the top of the base 1 and the bottom of the crossbeam 3. The clamping part mainly consists of an L-shaped rod 4 that abuts against the inner wall of the corrugated pipe and a clamping rod 5 that abuts against the outer wall of the corrugated pipe. An arc-shaped rubber pad 11 is fixedly installed on the vertical surface of the L-shaped rod 4, and anti-slip protrusions 12 are evenly arranged along the arc surface on the arc-shaped rubber pad 11. The clamping rod 5 is arc-shaped, and an anti-slip pad 13 is fixedly installed on the side of the clamping rod 5 facing the corrugated pipe. When the L-shaped rod 4 and the clamping rod 5 abut against the inner and outer walls of the corrugated pipe, a clamping area is formed. Here, the arc-shaped rubber pad 11 on the L-shaped rod 4 is used to adapt to the arc surface of the inner wall of the bellows. The arc-shaped rubber pad 11 is made of nitrile rubber, which can avoid direct rigid contact between the L-shaped rod 4 and the inner wall of the bellows, and prevent scratching the inner wall. The anti-slip protrusions 12 can enhance the friction between the arc-shaped rubber pad 11 and the inner wall and improve the clamping stability. Furthermore, the anti-slip pad 13 on the clamping rod 5 is also curved to fit the outer wall of the bellows. The anti-slip pad 13 is provided with a grid-like anti-slip pattern and is made of silicone material, which can play a buffering role when clamping to avoid damaging the outer wall of the bellows. The grid-like anti-slip pattern can further increase the friction.

[0021] The clamping part also includes mounting seats 6 installed on the base 1 and the crossbeam 3, and the two sets of mounting seats 6 are arranged vertically and collinearly. At least three sets of threaded holes 7 for adapting to the diameter of the corrugated pipe are equidistantly opened on the mounting seats 6. When the connection of the L-shaped rod 4 is threaded into the threaded hole 7, a stable area is formed. An arc-shaped groove 8 for placing the end of the corrugated pipe is opened on the transverse surface of the L-shaped rod 4. The clamping rod 5 is located in the arc-shaped groove 8. A threaded hole 9 is opened on the L-shaped rod 4, and a screw 10 is threaded into the threaded hole 9. The end of the screw 10 is rotatably connected to the corresponding side of the clamping rod 5. A handle 14 is fixedly installed on the end of the screw 10 away from the clamping rod 5. When the screw 10 rotates, the clamping rod 5 moves linearly along the path of the arc-shaped groove 8. Here, when the end of the bellows is inserted into the arc-shaped groove 8, simply turning the screw 10 will cause the clamping rod 5 on the screw 10 to move along the path of the arc-shaped groove 8, thus securing the bellows. Figure 1 For example, the clamping rod 5 moves along the X-axis. It should be noted that when the screw 10 rotates clockwise, the clamping rod 5 moves toward the bellows, and when the screw 10 rotates counterclockwise, the clamping rod 5 moves away from the bellows. Furthermore, by adjusting the position of the clamping rod 5, the distance between the clamping rod 5 and the L-shaped rod 4 can be controlled to adapt to corrugated pipes of different diameters and provide a better and more stable clamping effect, effectively preventing the corrugated pipe from sliding or falling off during the stretching process, ensuring the stability and accuracy of the tensile test, and thus improving the adaptability to the corrugated pipe diameter. Furthermore, by using several threaded holes 7 on the mounting base 6, the positions of the three sets of L-shaped rods 4 can be changed to better adapt to bellows of different diameters, effectively improving testing efficiency.

[0022] In this invention, during use, according to the length specifications of the corrugated pipe, the output end of the electric guide rail 2 is moved to the corresponding position, the bottom end of the corrugated pipe is inserted into the corresponding arc-shaped groove 8, and the screw 10 is rotated so that the screw 10 drives the clamping rod 5 to move towards the outer wall of the corrugated pipe. At this time, the arc-shaped rubber pad 11 on the L-shaped rod 4 abuts against the inner wall of the corrugated pipe. When the anti-slip pad 13 on the clamping rod 5 abuts against the outer wall of the corrugated pipe, the clamping of the bottom of the corrugated pipe is completed. Repeating the above operation can complete the clamping of the top of the corrugated pipe. At this time, the upward movement of the electric guide rail 2 causes the clamping part on the crossbeam 3 to drive one end of the corrugated pipe to move upward, thereby performing a tensile test. According to the diameter specifications of the corrugated pipe, the position of the L-shaped rod 4 on the mounting base 6 can be adjusted to better fit the corrugated pipe.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bellows stretching fixture, comprising a base (1) and electric guide rails (2) symmetrically mounted on the base (1), wherein a crossbeam (3) is provided between the two sets of electric guide rails (2), and the two ends of the crossbeam (3) are respectively fixedly connected to the output ends of the corresponding electric guide rails (2), wherein when the electric guide rails (2) are working, the crossbeam (3) moves up and down along the running path of the electric guide rails (2), characterized in that, It also includes a clamping part for limiting the end of the corrugated pipe, which is set on the top of the base (1) and the bottom of the crossbeam (3). The clamping part is mainly composed of an L-shaped rod (4) that abuts against the inner wall of the corrugated pipe and a clamping rod (5) that abuts against the outer wall of the corrugated pipe. When the L-shaped rod (4) and the clamping rod (5) abut against the inner and outer walls of the corrugated pipe, a clamping area is formed.

2. The bellows stretching fixture according to claim 1, characterized in that, The clamping part also includes a mounting seat (6) installed on the base (1) and the crossbeam (3), and the two sets of mounting seats (6) are arranged vertically and collinearly. At least three sets of threaded holes (7) for adapting to the diameter of the corrugated pipe are equidistantly opened on the mounting seat (6). When the connection of the L-shaped rod (4) is threaded into the threaded hole (7), a stable area is formed.

3. The bellows stretching fixture according to claim 2, characterized in that, The L-shaped rod (4) has an arc-shaped groove (8) for placing the end of the bellows on its transverse surface. The clamping rod (5) is located in the arc-shaped groove (8). The L-shaped rod (4) has a threaded hole (9) and a screw (10) is threaded into the threaded hole (9). The end of the screw (10) is rotatably connected to the corresponding side of the clamping rod (5). When the screw (10) rotates, the clamping rod (5) moves linearly along the path of the arc-shaped groove (8).

4. The bellows stretching fixture according to claim 1, characterized in that, An arc-shaped rubber pad (11) is fixedly installed on the vertical surface of the L-shaped rod (4), and anti-slip protrusions (12) are evenly arranged along the arc surface of the arc-shaped rubber pad (11).

5. The bellows stretching fixture according to claim 1, characterized in that, The clamping rod (5) is arc-shaped, and an anti-slip pad (13) is fixedly installed on the side of the clamping rod (5) facing the corrugated pipe.

6. The bellows stretching fixture according to claim 3, characterized in that, A handle (14) is fixedly installed at the end of the screw (10) away from the clamping rod (5).

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