High frequency fatigue pipe clamping tool
By designing a high-frequency fatigue pipe clamping fixture, and using clamping components and locking assemblies to stably clamp the pipe at high temperatures, the problem of hydraulic clamping equipment being unusable at high temperatures was solved, and the clamping uniformity of high-temperature fatigue testing was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANGYANNAKE CHENGDU TESTING & CERTIFICATION CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-06-26
AI Technical Summary
Existing hydraulic clamping equipment is not suitable for high-temperature environments and cannot meet the requirements for pipe fatigue testing under high-temperature conditions.
A high-frequency fatigue pipe clamping fixture was designed, which uses clamping components and locking components. The clamping components clamp the pipe synchronously in the circumferential direction, and the pressure-fixing components and locking components stabilize the pipe at high temperature, ensuring uniform clamping.
It achieves stable clamping of pipes in high-temperature environments, improves the uniformity of stress on pipes, and meets the requirements of high-temperature fatigue testing.
Smart Images
Figure CN224416567U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pipe clamping devices, and in particular to a high-frequency fatigue pipe clamping fixture. Background Technology
[0002] After the pipe is manufactured, it needs to be clamped on a servo fatigue testing machine to perform high-frequency fatigue testing.
[0003] On existing servo fatigue testing machines, pipes are typically clamped directly by hydraulic clamping devices (e.g., hydraulic vises, hydraulic jaws).
[0004] However, some pipe fatigue tests require testing in a high-temperature environment, and hydraulic clamping equipment is not suitable for high-temperature conditions and is limited by the temperature of the fatigue testing environment. Utility Model Content
[0005] In view of the above problems, this utility model provides a high-frequency fatigue pipe clamping fixture, the purpose of which is to meet the clamping requirements of pipes at different temperatures.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A high-frequency fatigue pipe clamping fixture is provided, comprising: a clamping body having a through hole for the pipe to pass through; a plurality of clamping components arranged in a circumferential array around the through hole at fixed intervals; wherein one end of each clamping component is fixedly mounted on the clamping body, and the other end of the clamping component extends a fixed length along the axial direction of the through hole; a clamping surface parallel to the central axis of the through hole and disposed on the clamping component for contacting the pipe; a driving surface inclined at a fixed angle to the central axis of the through hole and disposed on the clamping component; a pressing component detachably mounted on a servo fatigue testing machine; a locking assembly for pressing the pressing component onto the servo fatigue testing machine along the axial direction of the through hole; and a pressure contact surface disposed within the pressing component, capable of pressing the driving surface to press the clamping surface to clamp the pipe.
[0008] Furthermore, six clamping components are provided on a clamping body.
[0009] Furthermore, at least two positioning holes are provided on the clamping body, and two positioning pins are correspondingly provided on the worktable of the servo fatigue testing machine.
[0010] Furthermore, the pressure contact surface is cone-shaped and formed within the pressure-fixing component.
[0011] Furthermore, the locking assembly includes: a threaded hole, which is formed on the worktable of the servo fatigue testing machine; a screw, which passes through the clamping component and is installed in the threaded hole via a threaded connection, and the nut of the screw is used to press against the clamping component.
[0012] Furthermore, the locking assembly includes: a mounting hole formed on the worktable of the servo fatigue testing machine; a slide rod disposed within the mounting hole parallel to the central axis of the through hole; a slider disposed on the slide rod and slidably disposed within the mounting hole; a cover plate detachably mounted on the worktable of the servo fatigue testing machine by screws for sealing the mounting hole; a spring sleeved on the slide rod, one end abutting against the slider and the other end abutting against the cover plate; and a pressure block disposed on one side of the slide rod for pressing against the clamping component.
[0013] Furthermore, the locking assembly also includes a limiting pin, which is disposed on the clamping component and can be inserted into the clamping block.
[0014] The beneficial effects of this utility model are as follows: In this utility model, the clamping component clamps the pipe, which can meet the clamping requirements of the pipe at different temperatures and can conduct fatigue tests on the pipe under high temperature test conditions; by setting several clamping components in the circumferential direction of the pipe, the several clamping components can clamp the pipe simultaneously, which can effectively improve the uniformity of the force on the pipe. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the clamping fixture provided in Embodiment 1 of this application.
[0016] Figure 2 This is a top view of the clamping component installed on the clamping body according to Embodiment 1 of this application.
[0017] Figure 3 This is a top view of the clamping component provided in Embodiment 2 of this application.
[0018] Figure 4 This is a schematic diagram of the overall structure of the clamping fixture provided in Embodiment 2 of this application.
[0019] The components include: 1. Clamping body; 2. Clamping component; 21. Clamping surface; 22. Driving surface; 3. Pressing component; 31. Pressing contact surface; 32. Positioning hole; 41. Mounting hole; 42. Slide rod; 43. Slider; 44. Cover plate; 45. Spring; 46. Pressure block; 47. Limiting pin; and 5. Tube. Detailed Implementation
[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0021] Example 1
[0022] Reference Figure 1 and Figure 3 As shown in the embodiment of this application, a high-frequency fatigue pipe clamping fixture is disclosed, comprising: a clamping body 1, with a through hole for the pipe 5 to pass through; a plurality of clamping components 2, spaced at fixed intervals, arranged in a circumferential array around the through hole; wherein, one end of the clamping component 2 is fixedly mounted on the clamping body 1, and the other end of the clamping component 2 extends a fixed length along the axial direction of the through hole; a clamping surface 21, parallel to the central axis of the through hole, is disposed on the clamping component 2 for contacting the pipe 5; a driving surface 22, inclined at a fixed angle to the central axis of the through hole, is disposed on the clamping component 2; a pressing component 3, detachably mounted on a servo fatigue testing machine; a locking assembly for pressing the pressing component 3 onto the servo fatigue testing machine along the axial direction of the through hole; and a pressing contact surface 31, disposed within the pressing component 3, capable of pressing the driving surface 22 to press the clamping surface 21 to clamp the pipe 5.
[0023] In practical use, one end of the pipe 5 is passed through the through hole, and the driving surface 22 of the clamping component 2 is attached to the pressing contact surface 31 of the clamping component 3. Finally, the locking assembly applies pressure to the clamping component 3 along the axial direction of the through hole, and the pressing contact surface 31 of the clamping component 3 simultaneously squeezes the driving surface 22, thereby providing the clamping component 2 with a tendency to move toward the pipe 5 until the clamping surface 21 of the clamping component 2 clamps the outer wall surface of the pipe 5.
[0024] Reference Figure 2 As shown, six clamping components 2 are provided on a clamping body 1. The pipe 5 is clamped synchronously by the six clamping components 2, thereby improving the uniformity of the force on the pipe 5 in the circumferential direction.
[0025] It is worth mentioning that both the clamping body 1 and the clamping component 2 can be made of brass, while the pressure-fixing component 3 is made of cast iron, ensuring that the pressure-fixing component 3 can squeeze the clamping component 2 to clamp the pipe 5.
[0026] Preferably, at least two positioning holes 32 are provided on the clamping body 1, and two positioning pins are correspondingly provided on the worktable of the servo fatigue testing machine; by inserting the positioning pins into the positioning holes 32, the positioning of the clamping body 1 is completed.
[0027] Specifically, the pressure contact surface 31 is cone-shaped and is provided inside the clamping component 3. By providing the cone-shaped pressure contact surface 31, the pressure contact surface 31 can simultaneously press against the six clamping components 2, thereby driving the six clamping components 2 to simultaneously squeeze and clamp the pipe 5, further improving the uniformity of the force on the pipe 5.
[0028] In this embodiment, the locking assembly includes: a threaded hole, which is formed on the worktable of the servo fatigue testing machine; and a screw, which passes through the clamping component 3 and is installed in the threaded hole via a threaded connection, wherein the nut of the screw is used to press against the clamping component 3.
[0029] In practical use, the user can move the nut of the screw along the axial direction of the through hole by turning the screw, and apply pressure to the clamping component 3 along the axial direction of the through hole, thereby driving the clamping component 2 to clamp the outer wall surface of the pipe 5.
[0030] In this utility model, the clamping component 2 clamps the pipe 5, which can meet the clamping requirements of the pipe 5 at different temperatures and can conduct fatigue tests on the pipe 5 under high temperature test conditions. By setting several clamping components 2 in the circumferential direction of the pipe 5, several clamping components 2 can clamp the pipe 5 simultaneously, which can effectively improve the uniformity of the force on the pipe 5.
[0031] Example 2
[0032] Reference Figure 4 As shown, in this embodiment, the locking assembly includes: a mounting hole 41, which is formed on the worktable of the servo fatigue testing machine; a slide rod 42, which is set in the mounting hole 41 parallel to the central axis of the through hole; a slider 43, which is set on the slide rod 42 and slidably set in the mounting hole 41; a cover plate 44, which is detachably mounted on the worktable of the servo fatigue testing machine by screws and is used to cover the mounting hole 41; a spring 45, which is sleeved on the slide rod 42, with one end abutting against the slider 43 and the other end abutting against the cover plate 44; and a pressure block 46, which is set on one side of the slide rod 42 and is used to press against the clamping component 3.
[0033] Specifically, when it is necessary to clamp the pipe 5, the operator pulls the slide bar 42 to move the pressure block 46 toward the clamping component 3 and squeeze the spring 45; the operator then rotates the slide bar 42 to place the pressure block 46 above the clamping component 3. After the operator releases the pressure block 46, the spring 45 returns to its original shape and pushes the slider 43 to move, which in turn causes the clamping component 3 to squeeze the clamping component 2, thus completing the clamping of the pipe 5.
[0034] Preferably, four sliding rods 42 are arranged in a circumferential array around the pressing component 3, and the pressing component 3 is pressed by the four sliding rods 42.
[0035] In this invention, the spring 45 drives the pressure block 46 to press the clamping component 3, reducing the disassembly and assembly process of the screw, enabling quick disassembly and assembly of the clamping component 3, and improving the clamping efficiency of the pipe 5.
[0036] Specifically, the locking assembly also includes a limiting pin 47, which is disposed on the clamping component 3 and can be inserted into the clamping block 46. By inserting the limiting pin 47 into the clamping block 46, the rotation of the clamping block 46 can be restricted, ensuring that the clamping block 46 effectively presses against the clamping component 3.
[0037] Those skilled in the art will understand that although preferred embodiments of the present invention have been described, those skilled in the art, once they learn the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if these modifications and modifications of the present invention fall within the scope of the machine equivalents of the claims of the present invention, the present invention also intends to include these modifications and modifications.
Claims
1. A high-frequency fatigue pipe clamping fixture, characterized in that, include: The clamping body (1) has a through hole for the pipe (5) to pass through; Several clamping components (2) are arranged in a circumferential array around the through hole at fixed intervals; wherein, one end of the clamping component (2) is fixedly mounted on the clamping body (1), and the other end of the clamping component (2) extends a fixed length along the axial direction of the through hole. The clamping surface (21), parallel to the central axis of the through hole, is set on the clamping component (2) and is used to contact the tube (5); The driving surface (22) is inclined at a fixed angle to the central axis of the through hole and is set on the clamping component (2); The clamping component (3) is detachably mounted on the servo fatigue testing machine; Locking assembly, used to press the clamping component (3) onto the servo fatigue testing machine along the axial direction of the through hole; The pressure contact surface (31) is provided inside the clamping component (3) and can squeeze the driving surface (22) to squeeze the clamping surface (21) to clamp the pipe (5).
2. The fatigue pipe clamping fixture according to claim 1, characterized in that, Six clamping components (2) are provided on a clamping body (1).
3. The fatigue pipe clamping fixture according to claim 1, characterized in that, At least two positioning holes (32) are provided on the clamping body (1), and two positioning pins are correspondingly provided on the worktable of the servo fatigue testing machine.
4. The fatigue pipe clamping fixture according to claim 1, characterized in that, The pressure contact surface (31) is cone-shaped and is located inside the pressure-fixing component (3).
5. The fatigue pipe clamping fixture according to claim 1, characterized in that, The locking assembly includes a threaded hole, which is located on the worktable of the servo fatigue testing machine; The screw passes through the clamping component (3) and is installed in the threaded hole via a threaded connection. The screw nut is used to press against the clamping component (3).
6. The fatigue pipe clamping fixture according to claim 1, characterized in that, The locking components include: Mounting hole (41) is provided on the worktable of the servo fatigue testing machine; The slide rod (42) is set in the mounting hole (41) parallel to the central axis of the through hole; The slider (43) is mounted on the slider (42) and is slidably mounted in the mounting hole (41); The cover plate (44) is detachably mounted on the worktable of the servo fatigue testing machine by screws and is used to seal the mounting hole (41); A spring (45) is fitted onto a slide bar (42), with one end abutting against a slider (43) and the other end abutting against a cover plate (44); A pressure block (46) is provided on one side of the slide bar (42) and is used to press against the clamping component (3).
7. The fatigue pipe clamping fixture according to claim 6, characterized in that, The locking assembly also includes a limiting pin (47), which is disposed on the clamping member (3) and can be inserted into the clamping block (46).