Pressure pulse testing machine

Abstract

The utility model relates to the technical field of automobile part processing, and provides a pressure pulse testing machine. The pressure pulse testing machine is used for testing the pressure of a pipeline and comprises a supporting piece, a driving assembly and a pressure applying assembly. Wherein the driving assembly is connected to the supporting piece, one end of the pressure applying assembly is connected to the driving assembly, the other end of the pressure applying assembly extends to the pipeline, and the pressure applying assembly is driven by the driving assembly to move in the length direction of the pipeline. When a pressure test is carried out on the pipeline, the pressure applying assembly can be driven by the driving assembly to move along the length direction of the pipeline, so that pressure can be applied to the pipeline in multiple directions, and the accuracy of a pressure pulse experiment result is improved.

Description

Technical Field

[0001] This application relates to the field of automotive parts processing technology, and in particular to a pressure pulse testing machine. Background Technology

[0002] During the manufacturing process of automotive piping, pressure pulse tests are required to inspect the quality of the piping and determine its fatigue life during long-term use.

[0003] Current automotive piping pressure pulse testing machines cannot apply pressure to automotive piping from multiple angles. This may result in inaccurate test data, affecting the normal use of automotive piping in the future. Utility Model Content

[0004] This application provides a pressure pulse testing machine to solve the problem that existing pulse testing machines cannot apply pressure to automotive pipelines from multiple directions.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a pressure pulse testing machine for performing pressure tests on pipelines, comprising: a support member; a drive assembly connected to the support member; and a pressure application assembly, one end of which is connected to the drive assembly and the other end of which extends into the pipeline, wherein the pressure application assembly is driven by the drive assembly to move along the length of the pipeline.

[0007] As an optional implementation, the drive assembly includes: a drive rod movably connected to the support member and rotating about the axis of the drive rod; a drive motor connected to the drive rod and driving the drive rod to rotate; wherein, the pressure application assembly is connected to the drive rod and moves along the axial direction of the drive rod.

[0008] As an optional implementation, the pressure application assembly includes: a power rod, the top of which is connected to a drive rod and extends and retracts along the length of the power rod; and a pressure sensor disposed on the side of the power rod facing the pipeline.

[0009] As an optional implementation, the pressure application assembly further includes: a transmission component, sleeved on the drive rod and threadedly connected to the drive rod; wherein the top end of the power rod is connected to the transmission component.

[0010] As an optional implementation, the pressure application assembly further includes a stabilizing member connected to the upper part of the pressure application assembly and sliding along the support member.

[0011] As an optional implementation, the pressure application assembly further includes: a pressure plate connected to the bottom end of the power rod, and a pressure sensor disposed on the side surface of the pressure plate facing away from the power rod.

[0012] As an optional implementation, it also includes: a pressure display, which is electrically connected to the pressure sensor; and / or a control panel, which is electrically connected to the drive assembly and the power rod.

[0013] As an optional implementation, it also includes: a pipe fixing device for fixing the pipe.

[0014] As an optional implementation, the pipeline fixing device includes: a fixing seat with an arc-shaped groove extending through both ends of the fixing seat, and the pipeline is placed in the arc-shaped groove; and a clamping assembly connected to the upper surface of the fixing seat and located at both ends of the fixing seat, the clamping assembly being used to clamp the pipeline.

[0015] As an optional implementation, the clamping assembly includes: a guide rod connected to the upper surface of the fixed base; a clamping plate slidably connected to the guide rod; and an elastic element sleeved on the guide rod and located between the top end of the guide rod and the clamping plate.

[0016] The pressure pulse testing machine provided in this application includes a support, a drive assembly, and a pressure application assembly. The drive assembly is connected to the support, one end of the pressure application assembly is connected to the drive assembly, and the other end of the pressure application assembly extends into a pipeline. The pressure application assembly is driven by the drive assembly to move along the length of the pipeline.

[0017] With this configuration, when pressure testing the pipeline, the pressure application component can move along the length of the pipeline under the drive of the drive component. This allows for multi-directional pressure application to the pipeline, improving the accuracy of pressure pulse test results. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a pressure pulse testing machine provided in an embodiment of this application;

[0020] Figure 2 This is a connection diagram between the driving component and the pressure application component provided in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the pipe fixing device provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 101-Support component; 1011-Support top plate; 1012-Support vertical plate; 102-Front cover plate; 1021-Connecting vertical plate; 1022-Connecting horizontal plate; 103-Base plate; 104-Support leg; 105-Support base; 106-Connecting block; 107-Fixing block;

[0024] 200 - Drive assembly; 210 - Drive rod; 220 - Drive motor;

[0025] 300 - Pressure application component; 310 - Power rod; 320 - Pressure sensor; 330 - Transmission component; 340 - Stabilizer; 350 - Pressure plate;

[0026] 400 - Pressure Indicator;

[0027] 500 - Control Panel;

[0028] 600-Pipe fixing device; 610-Fixing seat; 611-Arc-shaped groove; 620-Clamping assembly; 621-Guide rod; 6211-Limiting part; 622-Clamping plate; 623-Elastic element. Detailed Implementation

[0029] The automotive piping pressure pulse test, also known as the automotive piping pressure fatigue test, is a test method used to evaluate the durability and reliability of automotive piping under repeated pressure changes. This test simulates the pressure fluctuations that piping may encounter during actual use to determine its fatigue life in long-term use.

[0030] After the automotive piping is fabricated, its pressure resistance must be tested through a pressure pulse test to ensure normal use in the future.

[0031] In existing pressure pulse testing machines, the relative position between the pressure application component and the pipeline remains constant. During testing, pressure can only be applied to fixed parts of the pipeline. This may lead to inaccurate test data, affecting the normal operation of subsequent automotive piping systems.

[0032] In view of this, this application provides a pressure pulse testing machine for performing pressure tests on pipelines. The pressure pulse testing machine includes a support member, a driving component, and a pressure applying component. The driving component is connected to the support member, one end of the pressure applying component is connected to the driving component, and the other end of the pressure applying component extends into the pipeline. The pressure applying component is driven by the driving component to move along the length of the pipeline.

[0033] With this configuration, when the pipeline is pressure tested, the pressure application component can move along the length of the pipeline under the drive of the drive component, thereby achieving multi-directional pressure application to the pipeline and improving the accuracy of the pressure pulse test results.

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] Figure 1 This is a schematic diagram of the structure of a pressure pulse testing machine provided in an embodiment of this application. Figure 2 This is a diagram showing the connection relationship between the driving component and the pressure application component provided in an embodiment of this application.

[0036] Reference Figure 1 and Figure 2 As shown, this application provides a pressure pulse testing machine for performing pressure tests on pipelines. The pressure pulse testing machine includes a support member 101, a drive assembly 200, and a pressure application assembly 300. The drive assembly 200 is connected to the support member 101, one end of the pressure application assembly 300 is connected to the drive assembly 200, and the other end of the pressure application assembly 300 extends into the pipeline. The pressure application assembly 300 is driven by the drive assembly 200 to move along the length of the pipeline.

[0037] Thus, the support member 101 provides support for the drive assembly 200 and the pressure application assembly 300. One end of the pressure application assembly 300 is connected to the drive assembly 200 and can move along the length of the pipeline as the drive assembly 200 moves. Therefore, the relative position between the pressure application assembly 300 and the pipeline can be adjusted, enabling multi-directional pressure testing and improving the accuracy of the pressure pulse testing machine.

[0038] It is understood that the driving method of the drive component 200 can be various, such as cylinder drive, hydraulic cylinder drive or motor drive, as long as it can drive the pressure application component 300 to move along the length of the pipeline. No specific limitation is made here.

[0039] In one implementation, the drive assembly 200 may include a drive rod 210 and a drive motor 220. The drive motor 220 is connected to the drive rod 210 and can drive the drive rod 210 to rotate. Specifically, the output end of the drive motor 220 is connected to the drive rod 210, thereby enabling the drive rod 210 to rotate.

[0040] The drive rod 210 is movably connected to the support member 101 and can rotate around its own axis. The pressure application assembly 300 is connected to the drive rod 210. Driven by the drive rod 210, the pressure application assembly 300 can move along the axial direction of the drive rod 210, thereby enabling adjustment of the relative position between the pressure application assembly 300 and the pipeline, and realizing multi-directional pressure testing.

[0041] For example, the drive rod 210 can be a threaded rod. A connecting block 106 and a fixing block 107 are provided on the top wall of the support member 101. The drive motor 220 can be fixed to the support member 101 via the connecting block 106. The end of the drive rod 210 away from the drive motor 220 is rotatably connected to the fixing block 107.

[0042] In some embodiments, the support member 101 can be configured as an inverted L-shaped upright plate. The support member 101 includes a support top plate 1011 and a support upright plate 1012 connected to each other, with the support top plate 1011 disposed perpendicular to the support upright plate 1012. The support top plate 1011 is used to connect and support the drive assembly 200 and the pressure application assembly 300. Specifically, the connecting block 106 and the fixing block 107 are respectively disposed at both ends of the support top plate 1011 along its length.

[0043] The support plate 1012 is vertically arranged on the bottom plane and can provide stable support for the support member 101 and the drive assembly 200 and pressure assembly 300 connected to the support member 101, thereby avoiding shaking during the experiment.

[0044] The non-enclosed design of the support 101 allows the operator to observe the relative position of the internal pressure application component 300 and the pipeline from the front of the experimental machine, facilitating experimental operation.

[0045] Reference Figure 2 As shown, in some embodiments, the pressure application assembly 300 includes a power rod 310 and a pressure sensor 320. The top end of the power rod 310 is connected to the drive rod 210, and the power rod 310 is extendable and retractable along its length. Specifically, the power rod 310 can be a hydraulic rod, thereby adjusting the distance between the output end of the power rod 310 and the pipeline, and adapting to testing conditions with different pipe diameters. The pressure sensor 320 is disposed on the side of the power rod 310 facing the pipeline and can measure the pressure applied to the pipeline.

[0046] It is understandable that the top end of the power rod 310 is connected to the drive rod 210. This connection can occur either through an intermediate component or by the top end of the power rod 310 itself being directly connected to the drive rod 210. For example, the top end of the power rod 310 can be fitted onto the drive rod 210. No specific limitations are imposed here.

[0047] In one embodiment, the pressure application assembly 300 also includes a transmission member 330. The transmission member 330 is sleeved on the drive rod 210 and threadedly connected to the drive rod 210.

[0048] Since the top of the power rod 310 is connected to the transmission component 330, when the drive rod 210 rotates under the drive motor 220, the transmission component 330, which is threadedly connected to the drive rod 210, can move along the axial direction of the drive rod 210. Furthermore, the transmission component 330 can drive the connected power rod 310 to move. This allows for the adjustment of the position of the pressure sensor 320, enabling pressure pulse testing at different locations on the automotive piping, resulting in more accurate test results.

[0049] To reduce vertical vibration of the pressure application assembly 300 during movement and improve the accuracy of measurement results, the pressure application assembly 300 may also include a stabilizing member 340. The stabilizing member 340 is connected to the upper part of the pressure application assembly 300 and can slide along the support member 101.

[0050] In some embodiments, when the top end of the power rod 310 is connected to the drive rod 210 via the transmission member 330 (e.g.) Figure 2 As shown, the stabilizing member 340 can be disposed on the transmission member 330 and can slide along the support member 101. For example, the stabilizing member 340 can be disposed on the top of the transmission member 330 or on both sides of the transmission member 330 and slidably connected to the top wall of the support member 101.

[0051] In other embodiments, when the top end of the power rod 310 is directly sleeved on the drive rod 210, the stabilizing member 340 can be disposed on the upper part of the power rod 310 and can slide along the support member 101. For example, the stabilizing member 340 can be directly disposed on the top of the power rod 310, or it can be disposed on both sides of the power rod 310 and slidably connected to the top wall of the support member 101.

[0052] To further improve the stability of the pressure application component 300's movement, a sliding groove can be provided on the top wall of the support member 101 for the stabilizing member 340 to slide, thereby limiting the lateral swaying that may occur during the movement of the pressure application component 300. Simultaneously, it can guide the movement of the pressure application component 300 to a certain extent, thus ensuring the subsequent movement effect of the pressure application component 300 and facilitating the use of the pressure pulse testing machine.

[0053] In one implementation, the pressure application assembly 300 may further include a pressure plate 350. The pressure plate 350 is connected to the bottom end of the power rod 310, and a pressure sensor 320 is disposed on the surface of the pressure plate 350 facing away from the power rod 310. Specifically, one end of the pressure plate 350 is connected to the output end of the power rod 310, and the other end is provided with a pressure sensor 320, which can measure the force applied to the pipeline.

[0054] This setup is suitable for testing large-diameter pipelines. By having the pressure plate 350 contact the outer surface of the pipeline, the contact area between the pressure application component 300 and the pipeline is increased, resulting in more uniform stress distribution on the pipeline.

[0055] Figure 3 This is a schematic diagram of the pipe fixing device 600 provided in an embodiment of this application. (Refer to...) Figure 3 As shown, the pressure pulse testing machine also includes a pipeline fixing device 600. The pipeline fixing device 600 is located below the pressure application assembly 300 and is used to fix the pipeline. This prevents the pipeline from shifting when the power rod 310 applies pressure, thus avoiding any impact on the test results.

[0056] In one embodiment, the pipe fixing device 600 may include a fixing base 610 and a clamping assembly 620, with the clamping assembly 620 connected to the fixing base 610. The fixing base 610 is used to position the pipe, while the clamping assembly 620 cooperates with the fixing base 610 to clamp the pipe between the fixing base 610 and the clamping assembly 620, thereby ensuring the stability of the pipe throughout the testing process.

[0057] The fixing base 610 has an arc-shaped groove 611 extending along its length and penetrating both ends. The pipeline is placed within the arc-shaped groove 611. A clamping assembly 620 is connected to the upper surface of the fixing base 610 and located at both ends of the fixing base 610. The clamping assembly 620 can clamp the pipeline from both ends of the fixing base 610 to prevent pipeline movement.

[0058] Thus, pipes of different diameters can be fixed to the pipe fixing device 600 by the cooperation between the clamping components 620 and the arc-shaped grooves 611 located at both ends of the fixing base 610. Furthermore, since the clamping components 620 are only located at both ends of the fixing base 610, the area of ​​the pipe between the two ends of the fixing base 610 is exposed, allowing the pressure applying component 300 to contact any exposed part of the pipe. This further expands the range between the pressure applying component 300 and the pipe, improving the accuracy of the pressure pulse test results.

[0059] The clamping assembly 620 may include a guide rod 621, a clamping plate 622, and an elastic element 623. The guide rod 621 is connected to the upper surface of the fixed base 610. The clamping plate 622 is slidably connected to the guide rod 621 and can move up and down along the height direction of the guide rod 621. The elastic element 623 is sleeved on the guide rod 621 and located between the top end of the guide rod 621 and the clamping plate 622. Specifically, the elastic element 623 may be a spring.

[0060] This setup allows for the loading, unloading, and pressure pulse testing of pipelines of different diameters. When loading a pipeline, the operator can apply force to slide the clamping plate 622 upwards, allowing the pipeline to be stably placed within the arc-shaped groove 611. During this process, the elastic element 623 is compressed, applying a downward reaction force to the clamping plate 622. When the operator releases the clamping plate 622, under the action of the elastic element 623, the clamping plate 622 slides downwards and clamps against the outer wall of the pipeline, thus securing the pipeline.

[0061] Specifically, two guide rods 621 are arranged side by side along the width direction of the fixed base 610, and both guide rods 621 are fixedly connected to the upper surface of the fixed base 610. For example, the two guide rods 621 are located at both ends of the arc-shaped groove 611. This arrangement allows for avoidance of the arc-shaped groove 611 while also making the sliding of the clamping plate 622 smoother and the clamping force on the pipeline more balanced, resulting in a more stable testing process.

[0062] Both guide rods 621 are fitted with elastic elements 623. The top of the guide rod 621 is provided with a limiting part 6211, which can limit the clamping plate 622 and the elastic element 623.

[0063] The clamping plate 622 is provided with through holes for the two guide rods 621 to pass through, so that the clamping plate 622 can slide up and down along the two guide rods 621. The elastic element 623 is disposed between the upper surface of the clamping plate 622 and the limiting part 6211 at the top of the guide rod 621.

[0064] This design provides the clamping plate 622 with a certain degree of reset capability, thereby clamping the pipeline more snugly and ensuring the normal use of the pipeline afterwards.

[0065] Continue to refer to Figure 1 As shown, in some embodiments, the pressure pulse testing machine may further include a pressure display 400, or the pressure pulse testing machine may include a control panel 500, or the pressure pulse testing machine may include both the pressure display 400 and the control panel 500. The pressure display 400 may be electrically connected to the pressure sensor 320. The control panel 500 may be electrically connected to the drive assembly 200 and the power rod 310.

[0066] The pressure pulse testing machine also includes a front cover plate 102 connected to the fixed base 610. Specifically, the front cover plate 102 can also be configured as an L-shaped plate. The front cover plate 102 may include a connecting vertical plate 1021 and a connecting horizontal plate 1022, wherein one end of the connecting horizontal plate 1022 is connected to the outer wall of the fixed base 610 away from the supporting vertical plate 1012, and the other end of the connecting horizontal plate 1022 is connected to the connecting vertical plate 1021. Furthermore, the connecting vertical plate 1021 is vertically connected to the connecting horizontal plate 1022.

[0067] This arrangement provides installation space for the pressure display 400 and control panel 500, and facilitates experimentation by operators. For example, both the pressure display 400 and control panel 500 can be mounted on the surface of the front cover 102 away from the mounting base 610. Specifically, both the pressure display 400 and control panel 500 can be mounted on the outer wall of the connecting vertical plate 1021.

[0068] Understandably, there is still an observation window between the connecting vertical plate 1021 and the supporting top plate 1011, allowing operators to observe the relative positional relationship between the pressure application component 300 and the pipeline, and to make adjustments at any time.

[0069] The above settings facilitate operation of the pressure pulse testing machine. The pressure display 400 visualizes the force applied to the pressure sensor 320. The control panel 500 controls the movement of the drive assembly 200 and the power rod 310, ensuring the normal operation of the testing machine.

[0070] In one embodiment, the pressure pulse testing machine also includes a base, which comprises a base plate 103 and support legs. The support member 101 and the pipeline fixing device 600 are both placed above the base plate 103. The base plate 103 serves to support the fixing seat 610 and the support member 101, and provides a horizontal and stable testing environment for the pressure pulse experiment.

[0071] Specifically, support legs 104 are fixedly connected to the bottom corners of the base plate 103, thereby increasing the overall height of the pressure pulse testing machine and facilitating operation. Furthermore, support bases 105 are fixedly connected to the bottom ends of the support legs 104, which not only adjusts the flatness of the base plate 103 but also increases the contact area with the ground, thus improving the stability of the base.

[0072] In some embodiments, the support leg 104 can also be configured as a telescopic rod, thereby further adapting to the height requirements of various experimental scenarios.

[0073] The working principle of the pressure pulse testing machine provided in this application embodiment is as follows:

[0074] Before testing, the pipe to be tested can be fixed on the fixed base 610 by the cooperation between the arc groove 611 on the fixed base 610 and the clamping component 620.

[0075] In use, the drive motor 220 is controlled to rotate in both directions, causing the drive rod 210 to rotate accordingly. During this process, the threaded connection between the drive rod 210 and the transmission component 330 allows the transmission component 330 to move left and right along the length of the pipeline, thereby adjusting the positions of the drive rod 310 and the pressure sensor 320 to perform pressure pulse tests at different locations in the automotive pipeline. This results in more accurate test results and ensures the normal operation of subsequent pipelines.

[0076] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0077] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0078] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0079] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pressure pulse testing machine for performing pressure tests on pipelines, characterized in that, include: Support components; The drive component is connected to the support member; The pressure application component has one end connected to the drive component and the other end extending into the pipeline. The pressure application component is driven by the drive component to move along the length of the pipeline.

2. The pressure pulse testing machine according to claim 1, characterized in that, The driving component includes: A drive rod, movably connected to the support member, rotates about the axis of the drive rod; A drive motor is connected to the drive rod and drives the drive rod to rotate; The pressure-applying component is connected to the drive rod, and the pressure-applying component moves along the axial direction of the drive rod.

3. The pressure pulse tester of claim 2, wherein, The pressure application component includes: A power rod, the top of which is connected to the drive rod, and extends and retracts along the length of the power rod; A pressure sensor is located on the side of the power rod facing the pipeline.

4. The pressure pulse testing machine according to claim 3, characterized in that, The pressure application component also includes: A transmission component is sleeved on the drive rod and threadedly connected to the drive rod. The top end of the power rod is connected to the transmission component.

5. The pressure pulse testing machine according to claim 3, characterized in that, The pressure application component also includes: A stabilizing member is attached to the upper part of the pressure-applying assembly and slides along the support member.

6. The pressure pulse tester according to any one of claims 3 to 5, characterized in that The pressure application component also includes: A pressure plate is connected to the bottom end of the power rod, and the pressure sensor is disposed on the side surface of the pressure plate facing away from the power rod.

7. The pressure pulse tester of any one of claims 3-5, wherein, Also includes: A pressure display, which is electrically connected to the pressure sensor; and / or a control panel, wherein the control panel is electrically connected to the drive assembly and the power rod.

8. The pressure pulse testing machine according to any one of claims 1-3, characterized in that, Also includes: Pipe fixing device, used to fix the pipeline.

9. The pressure pulse tester of claim 8, wherein, The pipeline fixing device includes: The fixing base has an arc-shaped groove extending through both ends of the fixing base, and the pipeline is placed in the arc-shaped groove; A clamping assembly is connected to the upper surface of the fixing base and located at both ends of the fixing base. The clamping assembly is used to clamp the pipeline.

10. The pressure pulse testing machine according to claim 9, characterized in that, The clamping assembly includes: A guide rod is connected to the upper surface of the fixed base; A clamping plate is slidably connected to the guide rod; An elastic element is sleeved on the guide rod and located between the top end of the guide rod and the clamping plate.

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