A leak-proof check valve

Abstract

This utility model discloses a leak-proof check valve, belonging to the field of check valve technology. It includes a valve body and a valve cover. The valve body has an installation tube at its top, and an installation groove at its top. The valve cover is embedded in the installation groove, and a spring abuts against its bottom. A valve core is fixedly connected to the bottom of the spring. Multiple annularly distributed connecting grooves are formed on the inner wall of the installation groove. Connecting blocks that mate with the connecting grooves are slidably installed around the valve cover. A cavity is formed inside the valve cover, and a screw is rotatably installed within the cavity. A nut is fixedly connected to the upper end of the screw, and a slider is threaded onto the screw. A connecting rod is hinged between the slider and the connecting blocks. By using the connecting grooves, connecting blocks, screw, nut, slider, connecting rod, and limiting rod, the use of bolts is reduced, making the disassembly and assembly of the valve cover more convenient and improving the maintenance efficiency of the check valve.

Description

Technical Field

[0001] This utility model belongs to the field of check valve technology, specifically relating to a leak-proof check valve. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow of the medium. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The valve disc movement is divided into lift type and swing type. The lift type check valve is similar in structure to a gate valve, except that it lacks a valve stem to drive the valve disc. The medium flows in from the inlet end and flows out from the outlet end. When the inlet pressure is greater than the sum of the weight of the valve disc and its flow resistance, the valve is opened; conversely, when the medium flows back, the valve is closed.

[0003] The existing Chinese patent with publication number CN221880332U discloses a leak-proof check valve, including a valve body. The outer surfaces of both sides of the valve body are threaded. A first sealing gasket is fixedly installed on both sides of the valve body. A feed hole is opened on the left side of the valve body, and a discharge hole is opened on the right side of the valve body. A circular groove is opened on the top of the valve body. A second sealing gasket is fixedly installed on the top of the valve body. A valve cover is detachably installed on the top of the valve body by bolts. An upper magnet is fixedly installed on the bottom of the valve cover. A telescopic rod is fixedly installed in the middle of the bottom of the valve cover. A compression spring is fixedly installed on the bottom of the valve cover. A sealing column is fixedly installed on the bottom of the telescopic rod. A lower magnet is fixedly installed on the top of the sealing column. A rubber sleeve is fixedly installed on the outer surface of the bottom of the sealing column. A connection hole is opened at the bottom of the circular groove.

[0004] Regarding the aforementioned technologies, the inventors have discovered at least the following problems: In the prior art, valve covers are generally fixed with multiple bolts. When maintenance is required on the internal components of the check valve, the process of disassembling and assembling the valve cover is cumbersome, which affects the efficiency of maintenance. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof check valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof check valve, comprising a valve body and a valve cover, wherein an installation tube is provided on the top of the valve body, an installation groove is provided on the top of the installation tube, the valve cover is embedded in the installation groove, a spring is abutted against the bottom of the valve cover, a valve core is fixedly connected to the bottom of the spring, and a valve hole is provided inside the valve body below the installation tube.

[0007] The inner wall of the mounting groove is provided with multiple annularly distributed connecting grooves. Connecting blocks that are adapted to the connecting grooves are slidably installed around the valve cover. A cavity is provided inside the valve cover. A screw is rotatably installed in the cavity. A nut is fixedly connected to the upper end of the screw. A slider is threaded onto the screw. A connecting rod is hinged between the slider and the connecting block.

[0008] In a preferred embodiment, a sealing ring is fixedly connected to the inner wall of the valve hole.

[0009] In a preferred embodiment, a sealing sleeve is fixedly connected to the inner wall of the mounting tube, and the valve core slides within the sealing sleeve.

[0010] In a preferred embodiment, the top of the valve cover has a groove, and the nut is disposed in the groove.

[0011] In a preferred embodiment, a cover plate is magnetically connected to the opening of the groove.

[0012] In a preferred embodiment, a limiting rod arranged parallel to the screw is fixedly connected inside the cavity, and the slider is slidably sleeved on the limiting rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This leak-proof check valve, through the configuration of a connecting groove, connecting block, screw, nut, slider, connecting rod, and limit rod, allows for easy installation of the valve cover. First, the valve cover is inserted into the installation groove. Then, a tool is used to rotate the nut, causing the nut to rotate the screw. The screw then drives the slider to slide along the limit rod, allowing the slider to drive the connecting block to be inserted into the connecting groove via the connecting rod, thus fixing the valve cover. This reduces the use of bolts, making the process of disassembling and assembling the valve cover more convenient and improving the maintenance efficiency of the check valve.

[0015] This leak-proof check valve, with its grooves and cover plate, can protect the nut from impact and corrosion. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the valve cover of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0019] In the diagram: 1. Valve body; 11. Mounting pipe; 12. Mounting groove; 13. Spring; 14. Valve core; 15. Valve hole; 16. Connecting groove; 17. Sealing ring; 18. Sealing sleeve; 2. Valve cover; 21. Connecting block; 22. Screw; 23. Nut; 24. Slider; 25. Connecting rod; 26. Groove; 27. Cover plate; 28. Limiting rod. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments.

[0021] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the concept of the present invention are all within the scope of protection claimed by the present invention.

[0022] Please see Figure 1-3 This utility model provides a leak-proof check valve, including a valve body 1 and a valve cover 2. The top of the valve body 1 is provided with an installation tube 11, and the top of the installation tube 11 is provided with an installation groove 12. The valve cover 2 is embedded in the installation groove 12. The bottom of the valve cover 2 abuts against a spring 13. The bottom of the spring 13 is fixedly connected to a valve core 14. The valve body 1 is provided with a valve hole 15 located below the installation tube 11. Through the arrangement of the spring 13, valve core 14 and valve hole 15, in the original state, the valve core 14 is subjected to the elastic force of the spring 13 and is always inserted into the valve hole 15. When fluid enters from the inlet of the valve body 1, the valve core 14 is subjected to the fluid pressure and will push the valve core 14 out of the valve hole 15, so that the fluid can be discharged from the outlet of the valve body 1 through the valve hole 15. When the inlet of the valve body 1 stops flowing with fluid, the spring 13 will push the valve core 14 into the valve hole 15 to block it, thereby achieving the check valve effect.

[0023] A sealing ring 17 is fixedly connected to the inner wall of the valve hole 15. The sealing ring 17 can improve the sealing performance between the valve core 14 and the valve hole 15.

[0024] The inner wall of the mounting tube 11 is fixedly connected to a sealing sleeve 18, and the valve core 14 slides inside the sealing sleeve 18. The sealing sleeve 18 can play a sealing role between the valve core 14 and the inner wall of the mounting tube 11.

[0025] Specifically, multiple annularly distributed connecting grooves 16 are provided on the inner wall of the mounting groove 12. Connecting blocks 21, which are adapted to the connecting grooves 16, are slidably installed around the valve cover 2. A cavity is provided inside the valve cover 2, and a screw 22 is rotatably installed in the cavity. A nut 23 is fixedly connected to the upper end of the screw 22. A slider 24 is threadedly connected to the screw 22. A connecting rod 25 is hinged between the slider 24 and the connecting block 21. A limiting rod 28, which is arranged parallel to the screw 22, is fixedly connected in the cavity. The slider 24 is slidably sleeved on the limiting rod 28, and the connecting grooves... 16. The connection block 21, screw 22, nut 23, slider 24, connecting rod 25, and limit rod 28 are configured such that when installing the valve cover 2, the valve cover 2 is first inserted into the mounting groove 12, and then the nut 23 is rotated using a tool, causing the nut 23 to drive the screw 22 to rotate, causing the screw 22 to drive the slider 24 to slide along the limit rod 28, so that the slider 24 drives the connecting block 21 to be inserted into the connecting groove 16 through the connecting rod 25, thus fixing the valve cover 2. This reduces the use of bolts, makes the process of disassembling and assembling the valve cover more convenient, and improves the maintenance efficiency of the check valve.

[0026] The valve cover 2 has a groove 26 on its top, and the nut 23 is placed in the groove 26. The opening of the groove 26 is magnetically connected to the cover plate 27. The groove 26 and the cover plate 27 can cover and protect the nut 23, preventing it from being hit and from being damaged by corrosion.

[0027] To facilitate the guidance and positioning during the installation of the valve cover 2, a guide slider structure can be provided between the valve cover 2 and the side wall of the connecting groove 16, so that after the valve cover 2 is inserted into the connecting groove 16, the position of the connecting block 21 corresponds exactly with that of the connecting groove 16.

[0028] To facilitate the removal of the valve cover 2 from the mounting slot 12, an easy-pull groove can be provided on one side of the valve cover 2.

[0029] The working principle and usage process of this utility model are as follows: First, when installing the valve cover 2, insert the valve cover 2 into the mounting groove 12, and then use a tool to rotate the nut 23, so that the nut 23 drives the screw 22 to rotate, so that the screw 22 drives the slider 24 to slide along the limiting rod 28, so that the slider 24 drives the connecting block 21 to be inserted into the connecting groove 16 through the connecting rod 25, thereby fixing the valve cover 2. When disassembling the valve cover 2, simply use a tool to rotate the nut 23 in the opposite direction, so that the connecting block 21 can be moved out of the connecting groove 16, thereby opening the valve cover 2. This reduces the use of bolts, makes the process of disassembling and assembling the valve cover more convenient, and improves the maintenance efficiency of the check valve.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-proof check valve, comprising a valve body (1) and a valve cover (2), characterized in that: The valve body (1) is provided with an installation tube (11) at the top, and an installation groove (12) is provided at the top of the installation tube (11). The valve cover (2) is embedded in the installation groove (12). The bottom of the valve cover (2) is abutted against a spring (13). The bottom of the spring (13) is fixedly connected to a valve core (14). The valve body (1) is provided with a valve hole (15) located below the installation tube (11) inside. The inner wall of the mounting groove (12) is provided with a plurality of annularly distributed connecting grooves (16). The valve cover (2) is slidably installed with connecting blocks (21) that are compatible with the connecting grooves (16) around its perimeter. The valve cover (2) has a cavity inside, and a screw (22) is rotatably installed in the cavity. A nut (23) is fixedly connected to the upper end of the screw (22). A slider (24) is threaded onto the screw (22). A connecting rod (25) is hinged between the slider (24) and the connecting block (21).

2. The anti-leakage check valve according to claim 1, characterized in that: A sealing ring (17) is fixedly connected to the inner wall of the valve hole (15).

3. The anti-leakage check valve according to claim 1, characterized in that: The inner wall of the mounting tube (11) is fixedly connected to a sealing sleeve (18), and the valve core (14) slides inside the sealing sleeve (18).

4. The anti-leakage check valve according to claim 1, characterized in that: The valve cover (2) has a groove (26) on its top, and the nut (23) is placed in the groove (26).

5. A leak-proof check valve according to claim 4, characterized in that: A cover plate (27) is magnetically connected to the opening of the groove (26).

6. A leak-proof check valve according to claim 1, characterized in that: A limiting rod (28) arranged parallel to the screw (22) is fixedly connected inside the cavity, and the slider (24) is slidably sleeved on the limiting rod (28).

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