A calibration device for quality testing of flow valves

CN224636189UActive Publication Date: 2026-08-14SUZHOU ZHONGDIAN KEQI MEASUREMENT & TESTING TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-02
Publication Date
2026-08-14

AI Technical Summary

Technical Problem

[0004]针对流量阀的重量整体较重,进而在搬运安装过程中,无法保证流量阀的安装端与安装管道之间始终保持对齐,从而在安装过程中需要不断对流量阀的位置进行调整,从而降低了流量阀的检定效率的问题,本实用新型提出一种流量阀质量检测用检定装置,以克服现有相关技术所存在的上述技术问题

Benefits of technology

[0020]1、本实用新型通过转动升降组件,使其在转动过程中升降端进行上下移动,以使升降组件带动升降端安装的支撑组件进行上下移动,进而能够使支撑组件带动顶端放置的流量阀进行上下移动,从而使流量阀的一端中心与进水组件的一端中心相对应,然后拉动限位组件,使其移动至流量阀的一端,然后对限位组件进行转动,使其一侧转动至流量阀的一侧,然后松开限位组件,使其自身进行复位过程中带动一侧与流量阀的一侧相贴合,且能够推动流量阀向靠近进水组件的一端进行移动,以使流量阀的一端与进水组件的一端紧密贴合,从而便于对流量阀与进水组件之间进行安装,从而提高了流量阀的检定效率。

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Abstract

This utility model discloses a calibration device for flow valve quality testing, relating to the field of flow valve quality testing technology. The utility model includes a water tank. By rotating a lifting assembly, the lifting end moves up and down during rotation, causing the lifting assembly to move a support assembly mounted on the lifting end up and down. This, in turn, causes the support assembly to move the flow valve placed at the top up and down. Then, a limiting assembly is pulled, moving it to one end of the flow valve. The limiting assembly is then rotated, causing one side to rotate to the side of the flow valve. Releasing the limiting assembly allows it to reset, causing one side to come into contact with the side of the flow valve and pushing the flow valve towards the end closer to the inlet assembly. This ensures a tight fit between the flow valve and the inlet assembly, facilitating installation and improving the calibration efficiency of the flow valve.
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Description

Technical Field

[0001] This utility model belongs to the field of flow valve quality testing technology, and specifically relates to a calibration device for flow valve quality testing. Background Technology

[0002] The calibration device integrates a high-precision standard flow meter. When fluid flows through the flow valve under test, the standard flow meter measures the actual flow rate. By comparing this actual value with the set or indicated value of the flow valve, the indication error of the flow valve can be accurately calculated, thereby determining whether the flow valve's accuracy is up to standard.

[0003] In existing technologies, the flow valve is typically moved by hand between two sets of installation pipes, and then bolts are used to seal both ends of the flow valve to the two sets of installation pipes so that the liquid inside the installation pipes can pass through the flow valve for testing. However, the flow valve is relatively heavy, and it is impossible to ensure that the installation end of the flow valve remains aligned with the installation pipe during the handling and installation process. Therefore, the position of the flow valve needs to be constantly adjusted during the installation process, which reduces the testing efficiency of the flow valve. Utility Model Content

[0004] The overall weight of flow valves is relatively heavy, making it difficult to ensure that the installation end of the flow valve remains aligned with the installation pipeline during transportation and installation. This necessitates continuous adjustment of the flow valve's position during installation, thus reducing the efficiency of flow valve calibration. To address this issue, this utility model proposes a calibration device for flow valve quality testing, thereby overcoming the aforementioned technical problems in existing related technologies.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a calibration device for quality testing of flow valves, comprising a water tank:

[0007] The water tank is equipped with an inlet assembly, an outlet assembly, a lifting assembly, a support assembly, and a limit assembly.

[0008] The water inlet assembly is internally connected to the interior of the water tank so that the water inlet assembly can draw water from the water tank for the water source to enter the flow valve.

[0009] The outlet component is connected to the inside of the inlet component so that the water source flowing into the flow valve of the inlet component can cooperate with the outlet component to enter the water tank.

[0010] The lifting assembly has its lifting end fixedly installed on one side of the support assembly, so that the lifting assembly can drive the support assembly to move up and down, so that the support assembly can adjust the height of the flow valve.

[0011] A limiting component, the outer surface of which is slidably disposed with respect to the interior of a support component, so that the limiting component moves along the interior of the support component to limit the flow valve at the top of the support component.

[0012] Furthermore, the water inlet assembly includes a connecting pipe, the top end of which is fixedly connected to the bottom end of the water tank, a water pump is fixedly connected to one end of the connecting pipe, an installation pipe is fixedly installed at the outlet end of the water pump, a support base is fixedly installed on the outer surface of the installation pipe, and the bottom end of the support base is fixedly connected to the top end of the water tank.

[0013] Furthermore, the water outlet assembly includes a slide rail, the bottom end of which is fixedly installed to the top of the water tank. A slider is slidably mounted on the outer surface of the slide rail, and a positioning frame is fixedly installed on the top of the slider. A circulation pipe is fixedly installed inside the positioning frame.

[0014] Furthermore, the lifting assembly includes a mounting frame, one side of which is fixedly installed to the inner wall of the water tank. A threaded rod is rotatably connected inside the mounting frame, a handle is fixedly connected to the top of the threaded rod, and a lifting block is threadedly connected to the threaded surface of the threaded rod.

[0015] Furthermore, the lifting assembly also includes a limiting groove, which is formed on the inner wall of the mounting frame. A limiting block is slidably arranged inside the limiting groove, and one side of the limiting block is fixedly connected to one side of the lifting block.

[0016] Furthermore, the support assembly includes a support plate, one side of which is fixedly installed with one side of the lifting block, a support frame is fixedly connected to the top of the support plate, and a V-shaped plate is fixedly connected to the top of the support frame.

[0017] Furthermore, the limiting component includes a spring groove, which is formed inside the support frame. A spring is fixedly connected inside the spring groove. One end of the spring is fixedly connected to a limiting plate. A connecting rod is fixedly connected to one side of the limiting plate. A connecting frame is fixedly installed at one end of the connecting rod. A limiting plate is rotatably connected to the outer surface of the connecting frame.

[0018] A guide rod is fixedly connected to one side of the connecting frame, and the outer surface of the guide rod is slidably set with the inside of the support frame.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model utilizes a rotating lifting assembly, causing its lifting end to move up and down during rotation. This movement drives the support assembly mounted on the lifting end to move up and down, which in turn causes the support assembly to move the flow valve placed at the top up and down. This aligns the center of one end of the flow valve with the center of one end of the inlet assembly. Then, the limiting assembly is pulled to move to one end of the flow valve. The limiting assembly is then rotated so that one side rotates to the side of the flow valve. The limiting assembly is then released, allowing it to reset and bring one side into contact with the side of the flow valve. This pushes the flow valve closer to the inlet assembly, ensuring a tight fit between the flow valve and the inlet assembly. This facilitates the installation of the flow valve and the inlet assembly, thereby improving the calibration efficiency of the flow valve.

[0021] 2. This utility model moves the internally rotating connecting frame by pulling the limiting plate, so that the connecting frame, together with the guide rod fixed on one side, moves along the direction of the support frame. This causes the connecting frame to move the connecting rod fixed on one side. Since one end of the connecting rod is fixedly connected to one side of the limiting plate, and one side of the limiting plate is fixedly connected to one side of the spring, when the connecting rod moves, it can work with the limiting plate to compress the spring. Then, the limiting plate is rotated so that one side rotates to the side of the flow valve. Then, the limiting plate is released, and the spring releases the compressive stress, causing the limiting plate to reset. This allows the limiting plate, together with the connecting rod, to bring the limiting plate into contact with one end of the flow valve, thereby restricting the position of the flow valve and improving the stability of the flow valve during installation.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of this utility model from a rear-view perspective;

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention from a rear-view perspective;

[0027] Figure 4 For the present utility model Figure 3Enlarged schematic diagram of the local structure at point A;

[0028] Figure 5 This is a schematic diagram of the cross-sectional structure of the present invention from a bottom-view perspective;

[0029] Figure 6 For the present utility model Figure 5 An enlarged schematic diagram of the local structure at point B.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Water tank; 2. Water inlet assembly; 201. Connecting pipe; 202. Water pump; 203. Mounting pipe; 204. Support base; 3. Water outlet assembly; 301. Slide rail; 302. Slider; 303. Positioning frame; 304. Circulation pipe; 4. Lifting assembly; 401. Mounting frame; 402. Threaded rod; 403. Rotary handle; 404. Lifting block; 405. Limiting groove; 406. Limiting block; 5. Support assembly; 501. Support plate; 502. Support frame; 503. V-shaped plate; 6. Limiting assembly; 601. Spring groove; 602. Spring; 603. Limiting plate; 604. Connecting rod; 605. Connecting frame; 606. Limiting plate; 607. Guide rod. Detailed Implementation

[0032] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0033] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements 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 the utility model.

[0034] Please see Figures 1-6 As shown, this utility model is a calibration device for quality testing of flow valves, including a water tank 1:

[0035] The water tank 1 is equipped with an inlet component 2, an outlet component 3, a lifting component 4, a support component 5, and a limit component 6.

[0036] The water inlet assembly 2 is internally connected to the interior of the water tank 1, so that the water inlet assembly 2 can draw water out of the water tank 1 for the water source to enter the interior of the flow valve.

[0037] The water outlet component 3 is connected to the inside of the water inlet component 2, so that the water source flowing into the flow valve from the water inlet component 2 can enter the water tank 1 in conjunction with the water outlet component 3.

[0038] The lifting assembly 4 has its lifting end fixedly installed on one side of the support assembly 5, so that the lifting assembly 4 can drive the support assembly 5 to move up and down, so as to allow the support assembly 5 to adjust the height of the flow valve.

[0039] The limiting component 6 has its outer surface slidably disposed with respect to the interior of the support component 5, so that the limiting component 6 can move along the interior of the support component 5 to limit the flow valve at the top of the support component 5.

[0040] In use, the flow valve is placed on top of the support assembly 5, and then the lifting assembly 4 is rotated, causing its lifting end to move up and down during rotation. This causes the lifting assembly 4 to move the support assembly 5 mounted on its lifting end up and down, which in turn causes the support assembly 5 to move the flow valve placed on top up and down, aligning the center of one end of the flow valve with the center of one end of the inlet assembly 2. Then, the limiting assembly 6 is pulled, moving it to one end of the flow valve. The limiting assembly 6 is then rotated, causing one side to rotate to the side of the flow valve. Finally, the limiting assembly 6 is released, allowing it to reset, causing one side to come into contact with the side of the flow valve and thus pushing the flow valve. The flow valve is moved closer to the end of the inlet assembly 2 so that one end of the flow valve fits tightly with one end of the inlet assembly 2, thus facilitating the installation of the flow valve and the inlet assembly 2. Then, the above steps are reversed to move the limit assembly 6 and the support assembly 5 away from the flow valve. Then, the outlet assembly 3 is pushed so that one end fits with the other end of the flow valve during the movement. Then, the flow valve and the opposite end of the outlet assembly 3 are installed with bolts. Then, the inlet assembly 2 is activated to draw water from the water tank 1 into the flow valve and from the other end of the flow valve into the outlet assembly 3 and discharged into the water tank 1, thus forming a water circulation.

[0041] This invention utilizes a rotating lifting assembly 4, which causes its lifting end to move up and down during rotation. This movement drives the support assembly 5 mounted on the lifting end to move up and down, which in turn causes the support assembly 5 to move the flow valve placed at the top up and down. This aligns the center of one end of the flow valve with the center of one end of the inlet assembly 2. Then, the limiting assembly 6 is pulled to move to one end of the flow valve. The limiting assembly 6 is then rotated so that one side rotates to the side of the flow valve. The limiting assembly 6 is then released, allowing it to reset and bring one side into contact with the side of the flow valve. This pushes the flow valve closer to the end of the inlet assembly 2, ensuring a tight fit between the flow valve and the inlet assembly 2. This facilitates the installation of the flow valve and the inlet assembly 2, thereby improving the calibration efficiency of the flow valve.

[0042] In one embodiment, the water inlet assembly 2 includes a connecting pipe 201, the top end of which is fixedly connected to the bottom end of the water tank 1, a water pump 202 is fixedly connected to one end of the connecting pipe 201, an installation pipe 203 is fixedly installed at the outlet end of the water pump 202, a support 204 is fixedly installed on the outer surface of the installation pipe 203, and the bottom end of the support 204 is fixedly connected to the top end of the water tank 1.

[0043] By starting the water pump 202 and connecting the water pipe 201 connected to the water pump end, the water source inside the water tank 1 is drawn out and sprayed out from one end of the installation pipe 203 installed at the water pump 202 outlet end. One end of the flow valve is fixedly installed with one end of the installation pipe 203, so that the water source can enter the flow valve for flow rate verification. The support base 204 is set to support the installation pipe 203, thereby improving the stability of the installation pipe 203 and the flow valve during the installation process.

[0044] In one embodiment, the water outlet component 3 includes a slide rail 301, the bottom end of which is fixedly installed with the top end of the water tank 1. A slider 302 is slidably provided on the outer surface of the slide rail 301, a positioning frame 303 is fixedly installed on the top end of the slider 302, and a circulation pipe 304 is fixedly installed inside the positioning frame 303.

[0045] By pushing the positioning frame 303, the slider 302 installed at the bottom is moved along the slide rail 301, so that the positioning frame 303 drives one end of the internally installed circulation pipe 304 to move closer to the end of the flow valve installed at one end of the installation pipe 203, so that the circulation pipe 304 and the other end of the flow valve can be installed, so that the water inside the flow valve enters the interior of the circulation pipe 304, and the water inside the circulation pipe 304 is introduced into the interior of the water tank 1, so as to facilitate the circulation of the water inside the water tank 1.

[0046] In one embodiment, the lifting assembly 4 includes a mounting frame 401. One side of the mounting frame 401 is fixedly installed to the inner wall of the water tank 1. A threaded rod 402 is rotatably connected inside the mounting frame 401. A handle 403 is fixedly connected to the top of the threaded rod 402. A lifting block 404 is threadedly connected to the threaded surface of the threaded rod 402.

[0047] The lifting assembly 4 also includes a limiting groove 405, which is formed on the inner wall of the mounting frame 401. A limiting block 406 is slidably arranged inside the limiting groove 405, and one side of the limiting block 406 is fixedly connected to one side of the lifting block 404.

[0048] By rotating the handle 403, the threaded rod 402 fixed at the bottom is driven to rotate. Since the threaded surface of the threaded rod 402 is connected to the internal thread of the lifting block 404, and the outer surface of the lifting block 404 is slidably disposed with the interior of the mounting frame 401, when the threaded rod 402 rotates, it can drive the lifting block 404 to move along the interior of the mounting frame 401. When the lifting block 404 moves, it can drive the limiting block 406 fixed on one side to move along the direction of the limiting groove 405, thereby limiting the movement direction of the lifting block 404 by the limiting block 406 to improve the stability of the lifting block 404 during movement.

[0049] In one embodiment, the support component 5 includes a support plate 501, one side of which is fixedly installed with one side of the lifting block 404, a support frame 502 is fixedly connected to the top of the support plate 501, and a V-shaped plate 503 is fixedly connected to the top of the support frame 502.

[0050] By placing the flow valve at the top of the V-shaped plate 503, the V-shaped plate 503 supports the flow valve. As the lifting block 404 moves up and down, it can drive the support plate 501 installed on one side to move. The support plate 501 then drives the support frame 502 fixed at the top to move. This allows the support frame 502 to work with the V-shaped plate 503 fixed at the top to move the flow valve, thus adjusting the height of the flow valve and facilitating its installation on one end of the installation pipe 203.

[0051] In one embodiment, the limiting component 6 includes a spring groove 601, which is formed inside the support frame 502. A spring 602 is fixedly connected inside the spring groove 601. One end of the spring 602 is fixedly connected to a limiting plate 603. A connecting rod 604 is fixedly connected to one side of the limiting plate 603. A connecting frame 605 is fixedly installed at one end of the connecting rod 604. A limiting plate 606 is rotatably connected to the outer surface of the connecting frame 605.

[0052] A guide rod 607 is fixedly connected to one side of the connecting frame 605, and the outer surface of the guide rod 607 is slidably disposed with the inside of the support frame 502.

[0053] Pulling the limiting plate 606 moves the internally rotating connecting frame 605, causing the connecting frame 605 to move along the direction of the support frame 502 in conjunction with the guide rod 607 fixed on one side. This causes the connecting frame 605 to move the connecting rod 604 fixed on one side. Since one end of the connecting rod 604 is fixedly connected to one side of the limiting plate 603, and one side of the limiting plate 603 is fixedly connected to one side of the spring 602, when the connecting rod 604 moves, it can compress the spring 602 in conjunction with the limiting plate 603. Then, the limiting plate 606 is rotated so that one side rotates to the side of the flow valve. Then, the limiting plate 606 is released, and the spring 602 releases the compressive stress, causing the limiting plate 603 to reset. This allows the limiting plate 603, in conjunction with the connecting rod 604, to bring the limiting plate 606 into contact with one end of the flow valve, thereby restricting the position of the flow valve and improving the stability of the flow valve during installation.

[0054] Through the above technical solution, 1. By rotating the lifting assembly 4, the lifting end moves up and down during the rotation, so that the lifting assembly 4 drives the support assembly 5 installed on the lifting end to move up and down. In turn, the support assembly 5 drives the flow valve placed at the top to move up and down, so that the center of one end of the flow valve corresponds to the center of one end of the inlet assembly 2. Then, the limiting assembly 6 is pulled to move to one end of the flow valve. Then, the limiting assembly 6 is rotated so that one side rotates to one side of the flow valve. Then, the limiting assembly 6 is released, so that during its own reset process, one side moves to fit against one side of the flow valve, and can push the flow valve to move closer to the end of the inlet assembly 2, so that one end of the flow valve fits tightly against one end of the inlet assembly 2. This facilitates the installation between the flow valve and the inlet assembly 2, thereby improving the calibration efficiency of the flow valve.

[0055] 2. By pulling the limiting plate 606, the internally rotating connecting frame 605 is moved, so that the connecting frame 605, in conjunction with the guide rod 607 fixed on one side, moves along the direction of the support frame 502. This causes the connecting frame 605 to move the connecting rod 604 fixed on one side. Since one end of the connecting rod 604 is fixedly connected to one side of the limiting plate 603, and one side of the limiting plate 603 is fixedly connected to one side of the spring 602, when the connecting rod 604 moves, it can compress the spring 602 in conjunction with the limiting plate 603. Then, the limiting plate 606 is rotated so that one side rotates to the side of the flow valve. Then, the limiting plate 606 is released, and the spring 602 releases the compressive stress, causing the limiting plate 603 to reset. This allows the limiting plate 603, in conjunction with the connecting rod 604, to bring the limiting plate 606 into contact with one end of the flow valve, thereby restricting the position of the flow valve and improving the stability of the flow valve during installation.

[0056] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A calibration device for quality testing of a flow valve, comprising a water tank (1), characterized in that: The water tank (1) is equipped with an inlet assembly (2), an outlet assembly (3), a lifting assembly (4), a support assembly (5), and a limit assembly (6); The water inlet assembly (2) is connected to the interior of the water tank (1) so that the water inlet assembly (2) can draw water from the interior of the water tank (1) for the water source to enter the interior of the flow valve; The water outlet assembly (3) is connected to the inside of the water inlet assembly (2) so that the water source flowing into the flow valve from the water inlet assembly (2) can cooperate with the water outlet assembly (3) to enter the water tank (1); The lifting assembly (4) has its lifting end fixedly installed on one side of the support assembly (5) so that the lifting assembly (4) can drive the support assembly (5) to move up and down, so that the support assembly (5) can adjust the height of the flow valve. The limiting component (6) has its outer surface slidably disposed with respect to the interior of the support component (5) so that the limiting component (6) can move along the interior of the support component (5) to limit the flow valve at the top of the support component (5).

2. The calibration device for quality testing of a flow valve according to claim 1, characterized in that, The water inlet assembly (2) includes a connecting pipe (201), the top end of which is fixedly connected to the bottom end of the water tank (1), a water pump (202) is fixedly connected to one end of the connecting pipe (201), an installation pipe (203) is fixedly installed at the outlet end of the water pump (202), a support base (204) is fixedly installed on the outer surface of the installation pipe (203), and the bottom end of the support base (204) is fixedly connected to the top end of the water tank (1).

3. The calibration device for quality testing of a flow valve according to claim 1, characterized in that, The water outlet assembly (3) includes a slide rail (301), the bottom end of which is fixedly installed with the top end of the water tank (1). A slider (302) is slidably arranged on the outer surface of the slide rail (301), and a positioning frame (303) is fixedly installed on the top end of the slider (302). A circulation pipe (304) is fixedly installed inside the positioning frame (303).

4. The calibration device for quality testing of a flow valve according to claim 1, characterized in that, The lifting assembly (4) includes a mounting frame (401), one side of which is fixedly installed to the inner wall of the water tank (1). A threaded rod (402) is rotatably connected inside the mounting frame (401), and a handle (403) is fixedly connected to the top of the threaded rod (402). A lifting block (404) is threadedly connected to the threaded surface of the threaded rod (402).

5. A calibration device for quality testing of a flow valve according to claim 4, characterized in that, The lifting assembly (4) also includes a limiting groove (405), which is opened on the inner wall of the mounting frame (401). A limiting block (406) is slidably arranged inside the limiting groove (405), and one side of the limiting block (406) is fixedly connected to one side of the lifting block (404).

6. The calibration device for quality testing of a flow valve according to claim 4, characterized in that, The support assembly (5) includes a support plate (501), one side of the support plate (501) is fixedly installed with one side of the lifting block (404), a support frame (502) is fixedly connected to the top of the support plate (501), and a V-shaped plate (503) is fixedly connected to the top of the support frame (502).

7. A calibration device for quality testing of a flow valve according to claim 6, characterized in that, The limiting component (6) includes a spring groove (601), which is opened inside the support frame (502). A spring (602) is fixedly connected inside the spring groove (601). One end of the spring (602) is fixedly connected to a limiting plate (603). A connecting rod (604) is fixedly connected to one side of the limiting plate (603). A connecting frame (605) is fixedly installed at one end of the connecting rod (604). A limiting plate (606) is rotatably connected to the outer surface of the connecting frame (605). A guide rod (607) is fixedly connected to one side of the connecting frame (605), and the outer surface of the guide rod (607) is slidably disposed with the inside of the support frame (502).