A leak-proof gate valve

Abstract

The utility model relates to the technical field of gate valve, and disclose a kind of anti-leakage gate valve, including gate valve, the inside rotation connection of gate valve has connecting rod, the bottom rotation connection of connecting rod has sealing anti-infiltration mechanism.This anti-leakage gate valve, when gate valve is being opened and closed control water source flow, rotating connecting rod, can make the valve disc outside connecting rod outside up and down movement, valve disc moves downward can be stuck in the cavity in the inside of gate valve, because still installed rubber pad and sealing washer on the both sides of gate valve, rubber pad and sealing washer are installed in the both sides of valve disc by connecting bolt, the periphery of sealing washer is the setting of slope, facilitate the up and down movement and fit of valve disc, simultaneously still installed liquid-passing net on the both sides in gate valve, prevent the impurity in water source inside contact valve disc and sealing component, realized increase internal tightness, reduce the situation that internal liquid seeps when gate valve is closed, guarantee the normal operation of subsequent working device.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to a gate valve that can prevent leakage. Background Technology

[0002] Gate valves, as key equipment used to cut off or connect media in fluid transport systems, are widely used in many fields such as petrochemical, chemical, hydrogen energy, LNG, nuclear power and mining due to their simple structure and low flow resistance. However, their leakage problem has long plagued the industry's development and restricted their reliable application in high-risk and extreme working conditions. Therefore, it is necessary to design a gate valve that can prevent leakage.

[0003] A leak-proof gate valve disclosed in CN219796161U includes a gate valve and a pipeline. The gate valve has a connecting mechanism on its surface, comprising a connecting sleeve, a connecting head surface of the gate valve fixed to the right side of the inner wall of the connecting sleeve, an inner wall of the connecting sleeve fixed to one end of a spring, and the other end of the spring fixed to an abutment ring. The abutment ring is fixed to a connecting post on its side near the spring. This leak-proof gate valve, through its connecting mechanism, allows for connection between the gate valve and the pipeline. The gate valve's connecting head is threaded onto the pipeline, causing the pipeline to compress the abutment ring, which in turn compresses the spring. The abutment ring, via the connecting post, moves a piston ring away from the spring. Gas within the cavity is forced into an air bladder through the connecting channel. The air bladder expands, compressing and sealing the surface of the pipeline, thus preventing leakage without the need for wrapping with raw material.

[0004] While the aforementioned patent achieves the goal of preventing leakage at the locations where external pipes are connected on both sides of the gate valve, in actual use, the gate valve may experience slight leakage due to long-term use. This can hinder the gate valve's control of water flow, reduce its sealing performance during operation, and cause leakage that could affect the normal operation of downstream pipes and devices. Furthermore, when connected to a water source, impurities and dirt may be mixed in. These impurities and dirt can enter the gate valve and, over time, cause the internal control components to age and wear, reducing the device's lifespan and compromising its internal sealing and leak-proof performance, resulting in leakage. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this utility model is to provide a leak-proof gate valve to solve the problem mentioned in the background art, where, during actual use, the gate valve may experience slight leakage due to long-term use, reducing the sealing performance when the gate valve is opened and closed. This leakage can affect the normal operation of downstream pipelines and devices, as well as the aging and wear of internal control components caused by impurities and dirt inside the water source, reducing the lifespan of the device and affecting the internal sealing and leak-proof performance of the device, resulting in leakage.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof gate valve, comprising a gate valve, a connecting rod rotatably connected inside the gate valve, a sealing and leak-proof mechanism rotatably connected to the bottom of the connecting rod, a filter mechanism installed inside the left end of the gate valve, the sealing and leak-proof mechanism comprising a valve disc rotatably connected to the bottom of the connecting rod, rubber gaskets installed inside both sides of the valve disc, a sealing gasket fixed to the outside of the rubber gaskets, and a liquid-passing mesh snapped onto the outside of both sides of the valve disc.

[0009] As a further embodiment of this utility model, arc-shaped grooves are provided inside both sides of the valve disc, and a locking block is engaged inside the arc-shaped groove. The arc-shaped grooves are designed to work with the locking block to achieve quick engagement and positioning of the valve disc and the sealing component, improve assembly efficiency, limit the axial and radial displacement of the locking block, enhance the connection stability between the valve disc and the matching component, and prevent loosening caused by vibration during operation.

[0010] As a further embodiment of this utility model, grooves are provided on both sides of the valve disc, the rubber pad is fixedly connected to the inside of the groove, and the locking block is fixedly connected to the back of the rubber pad. The locking block is used to achieve a firm connection between the rubber pad and the valve disc, and to prevent the rubber pad from falling off under opening and closing or media impact.

[0011] As a further embodiment of this utility model, a threaded hole is provided in the middle of the valve disc, and a connecting hole is provided in the middle of both the rubber gasket and the sealing gasket. The threaded hole provides an installation base for connecting the valve disc and valve stem and other components, realizes the fixed assembly between components, ensures the smooth installation of fasteners, and does not damage the sealing integrity of the rubber gasket and the sealing gasket.

[0012] As a further embodiment of this utility model, the internal thread of the connecting hole is connected to a connecting bolt, and the external thread of the end of the connecting bolt is connected to the inside of the threaded hole. The setting of the connecting bolt achieves a tight and secure assembly of the valve disc, the rubber gasket, and the sealing gasket, ensuring the stability of the connection between the three, preventing the components from loosening due to vibration or media impact during operation, and ensuring reliable sealing.

[0013] As a further embodiment of this utility model, a Y-shaped filter tube is provided through the left side of the gate valve, and the filter bucket is installed inside the Y-shaped filter tube. The Y-shaped filter tube guides the flow of the medium and provides a mounting carrier and stable working space for the filter bucket.

[0014] As a further embodiment of this utility model, a threaded pipe is fixedly connected to the top of the filter barrel, a sealing cap is connected to the external thread of the threaded pipe, a flange is fixedly connected around the sealing cap, and a threaded bolt is connected to the internal thread of the flange. The flange enhances the connection and tightness of the sealing cap with the threaded bolt, resists the impact of media pressure to prevent loosening, facilitates the periodic opening of the filter barrel to clean and trap impurities, and reduces the difficulty of maintenance.

[0015] As a further embodiment of this utility model, both ends of the gate valve are fixedly connected to a connecting plate, and a through pipe is fixedly connected to the middle of the outer side of the connecting plate. A sealing sleeve is fitted onto the outside of the through pipe. The sealing sleeve fills the gap between the through pipe and the pipeline, blocks the leakage path of the medium, and improves the sealing performance of the connection.

[0016] (III) Beneficial Effects

[0017] This utility model provides a gate valve that can prevent leakage, which has the following beneficial effects:

[0018] 1. This leak-proof gate valve, through the setting of a sealing and leak-proof mechanism, allows the valve disc outside the connecting rod to move up and down outside the connecting rod when the gate valve is opening and closing to control the flow of water. The downward movement of the valve disc can lock it into the cavity inside the gate valve. Because rubber gaskets and sealing gaskets are also installed on both sides of the gate valve, and the rubber gaskets and sealing gaskets are installed on both sides of the valve disc by connecting bolts, the sealing gaskets are sloped around them to facilitate the up and down movement and engagement of the valve disc. At the same time, liquid-passing screens are also installed on both sides inside the gate valve to prevent impurities inside the water source from contacting the valve disc and sealing components, thereby increasing internal sealing performance, reducing internal liquid leakage when the gate valve is closed, and ensuring the normal operation of subsequent working devices.

[0019] 2. This leak-proof gate valve, through its filtration mechanism, features a Y-shaped filter pipe installed at the left end of the valve while water is flowing through it. Water flows through the filter barrel inside the Y-shaped filter pipe and into the filter barrel through an opening on its side, trapping impurities and dirt inside the water. Simultaneously, a filter screen is installed at the top of the filter barrel, filtering and retaining internal impurities. This effectively filters out impurities and dirt from the external water source, preventing them from entering the gate valve. Such entry of impurities not only wears down and ages the internal components, reducing the lifespan of the equipment, but also improves the efficiency of the gate valve and enhances the sealing of its internal components. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the sealing and seepage prevention mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the filter mechanism structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the pipe opening structure of this utility model.

[0024] In the diagram: 1. Gate valve; 2. Connecting rod; 3. Sealing and seepage prevention mechanism; 301. Valve disc; 302. Rubber gasket; 303. Sealing gasket; 304. Liquid passing screen; 4. Filtration mechanism; 401. Filter barrel; 402. Filter screen; 5. Arc-shaped groove; 6. Locking block; 7. Threaded hole; 8. Connecting hole; 9. Connecting bolt; 10. Y-type filter tube; 11. Threaded tube; 12. Sealing cover; 13. Flange; 14. Threaded bolt; 15. Connecting disc; 16. Through pipe; 17. Sealing sleeve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] Example 1

[0027] Please see Figures 1 to 4This utility model provides a technical solution: a leak-proof gate valve, including a gate valve 1. A Y-shaped filter pipe 10 passes through the left side of the gate valve 1. A filter barrel 401 is installed inside the Y-shaped filter pipe 10. The Y-shaped filter pipe 10 guides the flow of the medium and provides a mounting carrier and stable working space for the filter barrel 401. Both ends of the gate valve 1 are fixedly connected to connecting plates 15. A through pipe 16 is fixedly connected to the middle of the outer side of the connecting plate 15. A sealing sleeve 17 is fitted onto the outside of the through pipe 16. The sealing sleeve 17 fills the gap between the through pipe 16 and the pipeline, blocks the leakage path of the medium, and improves the sealing of the connection. The gate valve 1 rotates internally. A connecting rod 2 is connected, and a sealing and seepage prevention mechanism 3 is rotatably connected to the bottom of the connecting rod 2. A filter mechanism 4 is installed inside the left end of the gate valve 1. The sealing and seepage prevention mechanism 3 includes a valve disc 301 rotatably connected to the bottom of the connecting rod 2. Arc-shaped grooves 5 are opened inside both sides of the valve disc 301. A locking block 6 is locked inside the arc-shaped groove 5. The arc-shaped groove 5 is designed to cooperate with the locking block 6 to achieve quick locking and positioning of the valve disc 301 and the sealing component, improve assembly efficiency, limit the axial and radial displacement of the locking block 6, enhance the connection stability between the valve disc 301 and the matching component, and prevent loosening caused by vibration under working conditions. Grooves are opened on both sides of the valve disc 301, and rubber gaskets 302 are fixedly connected to the grooves. Inside, the locking block 6 is fixedly connected to the back of the rubber gasket 302. The locking block 6 ensures a secure connection between the rubber gasket 302 and the valve disc 301, preventing the rubber gasket 302 from falling off during opening / closing or media impact. A threaded hole 7 is provided in the center of the valve disc 301, and connecting holes 8 are provided in the center of both the rubber gasket 302 and the sealing gasket 303. The threaded holes 7 provide an installation base for connecting the valve disc 301 to components such as the valve stem, enabling fixed assembly between components, ensuring smooth fastener insertion, and maintaining the sealing integrity of the rubber gasket 302 and the sealing gasket 303. Rubber gaskets 302 are installed inside both sides of the valve disc 301, and the outer sides of the rubber gaskets 302 are fixed... A sealing gasket 303 is provided. A liquid-passing screen 304 is snapped onto the two sides of the valve disc 301. The filtration mechanism 4 includes a filter barrel 401 installed inside the left end of the gate valve 1. A threaded pipe 11 is fixedly connected to the top of the filter barrel 401. A sealing cover 12 is connected to the external thread of the threaded pipe 11. A flange 13 is fixedly connected around the sealing cover 12. A threaded bolt 14 is connected to the internal thread of the flange 13. The flange 13 strengthens the connection and tightness of the sealing cover 12 with the threaded bolt 14, resists the impact of medium pressure and prevents loosening, and facilitates the periodic opening of the filter barrel 401 to clean the trapped impurities and reduce the difficulty of maintenance. A filter screen 402 is fixedly connected to the top of the filter barrel 401.

[0028] Furthermore, the internal thread of the connecting hole 8 is connected to the connecting bolt 9, and the external thread of the end of the connecting bolt 9 is connected to the inside of the threaded hole 7. The setting of the connecting bolt 9 achieves the tight fastening assembly of the valve disc 301, the rubber gasket 302, and the sealing gasket 303, ensuring the connection stability of the three, preventing the components from loosening due to vibration or media impact during operation, and ensuring reliable sealing.

[0029] In this invention, the working steps of the device are as follows:

[0030] First step: When the gate valve 1 is opening and closing to control the flow of water, rotating the connecting rod 2 allows the valve disc 301 outside the connecting rod 2 to move up and down. The downward movement of the valve disc 301 can lock the valve disc 301 into the cavity inside the gate valve 1. Since rubber gaskets 302 and sealing gaskets 303 are also installed on both sides of the gate valve 1, and the rubber gaskets 302 and sealing gaskets 303 are installed on both sides of the valve disc 301 by connecting bolts 9, the sealing gasket 303 is surrounded by a slope to facilitate the up and down movement and engagement of the valve disc 301. At the same time, liquid-passing mesh 304 is also installed on both sides inside the gate valve 1 to prevent impurities inside the water source from contacting the valve disc 301 and sealing components.

[0031] The second step: While the gate valve 1 is circulating water, a Y-shaped filter pipe 10 is installed at the left end of the gate valve 1. The water flows through the filter barrel 401 inside the Y-shaped filter pipe 10 and enters the filter barrel 401 from the opening on the side of the filter barrel 401, blocking impurities and dirt in the water and leaving them inside the filter barrel 401. At the same time, a filter screen 402 is also installed inside the top of the filter barrel 401, filtering simultaneously while retaining the impurities inside. It should be noted that the device structure and drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system, and control system of the device is not fully described. However, those skilled in the art who understand the principle of the above utility model can clearly understand the specific details of its power mechanism, power supply system, and control system. The control method in the application document is automatic control through a controller, and the control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0032] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0033] 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 gate valve, comprising a gate valve (1), characterized in that: The gate valve (1) is rotatably connected to a connecting rod (2), and the bottom of the connecting rod (2) is rotatably connected to a sealing and anti-seepage mechanism (3). A filter mechanism (4) is installed inside the left end of the gate valve (1). The sealing and seepage prevention mechanism (3) includes a valve disc (301) rotatably connected to the bottom of the connecting rod (2). Rubber pads (302) are installed inside both sides of the valve disc (301). A sealing pad (303) is fixed on the outside of the rubber pads (302). A liquid-passing mesh (304) is snapped onto the outside of both sides of the valve disc (301). The filtration mechanism (4) includes a filter barrel (401) installed inside the left end of the gate valve (1), and a filter screen (402) is fixedly connected inside the top of the filter barrel (401).

2. The leak-proof gate valve according to claim 1, characterized in that: The valve disc (301) has arc-shaped slots (5) on both sides inside, and a locking block (6) is engaged inside the arc-shaped slots (5).

3. A leak-proof gate valve according to claim 2, characterized in that: The valve disc (301) has grooves on both sides, the rubber pad (302) is fixedly connected to the inside of the groove, and the locking block (6) is fixedly connected to the back of the rubber pad (302).

4. A leak-proof gate valve according to claim 1, characterized in that: The valve disc (301) has a threaded hole (7) in the middle, and the rubber gasket (302) and the sealing gasket (303) both have a connecting hole (8) in the middle.

5. A leak-proof gate valve according to claim 4, characterized in that: The internal thread of the connecting hole (8) is connected to a connecting bolt (9), and the external thread of the end of the connecting bolt (9) is connected to the inside of the threaded hole (7).

6. A leak-proof gate valve according to claim 1, characterized in that: A Y-shaped filter tube (10) runs through the left side of the gate valve (1), and the filter barrel (401) is installed inside the Y-shaped filter tube (10).

7. A leak-proof gate valve according to claim 1, characterized in that: The top of the filter barrel (401) is fixedly connected to a threaded pipe (11), and the external thread of the threaded pipe (11) is connected to a sealing cap (12). The sealing cap (12) is fixedly connected to a flange (13) around its perimeter, and the internal thread of the flange (13) is connected to a threaded bolt (14).

8. A leak-proof gate valve according to claim 1, characterized in that: Both ends of the gate valve (1) are fixedly connected to a connecting plate (15), and a through pipe (16) is fixedly connected to the middle of the outer side of the connecting plate (15). A sealing sleeve (17) is sleeved on the outside of the through pipe (16).

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