A type of filter gate valve

Abstract

This utility model discloses a filtering gate valve, which includes a gate valve body and an internal valve core assembly. The valve core assembly includes an outer valve body and an inner valve body. The outer valve body has an outer plate with screen holes and an outer tube. The inner valve body has a valve core plate and an inner rod that penetrates the outer tube. The horizontal projection of the valve core plate covers all the screen holes. The gate valve body includes a water delivery pipe and an upper shell. The water delivery pipe is equipped with a sealing ring, and the outer plate is equipped with a corresponding sealing ring. The outer tube and the upper shell are threaded together. The upper shell is connected to a limit member by fixing bolts, and the inner rod is threaded together with the limit member. Filtration is achieved through the screen holes of the outer plate. The sealing ring and the sealing ring work together to improve the sealing reliability. The double thread engagement allows for fine adjustment of the outer plate and precise raising and lowering of the valve core plate. The overall structure is simplified and suitable for water supply and drainage, industrial fluid transportation, and other scenarios, combining filtration, sealing, and flow regulation functions.

Description

Technical Field

[0001] This utility model provides a gate valve, and particularly relates to a filter gate valve. Background Technology

[0002] Gate valves are commonly used pipeline opening and closing and flow regulation devices. They control the opening and closing of pipelines and the flow rate by raising and lowering the valve core. They are widely used in many fields such as water supply and drainage, petroleum, and chemical industry. Their sealing performance and the accuracy and stability of flow regulation are crucial to the normal operation of pipeline systems.

[0003] Existing gate valves typically employ a single-layer valve core structure, relying on direct contact between the valve core and the valve seat for sealing. However, under long-term use or high-pressure conditions, this structure is prone to wear and deformation of the sealing surface, leading to insufficient sealing reliability and easy leakage after closure. Furthermore, while some gate valves possess certain filtration capabilities, these are often additional filter components with low integration with the valve core. This not only increases pipeline complexity but also results in poor integration of filtration and flow regulation, making it difficult to achieve effective filtration while simultaneously providing stable and precise flow regulation. Additionally, it fails to adequately meet the sealing requirements under high pressure, thus impacting the overall performance and service life of the gate valve. Utility Model Content

[0004] In order to solve the above problems, this application provides a filter-type gate valve, which solves the problems of poor filtration effect, insufficient sealing performance and poor water flow regulation stability of existing gate valves, and realizes the dual functions of efficient filtration and reliable sealing regulation.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a filter gate valve, including a gate valve housing, wherein a valve core assembly is provided inside the gate valve housing, and the valve core assembly includes an outer valve body and an inner valve body;

[0006] The outer valve body includes a pair of outer plates placed on both sides of the inner valve body, and an outer tube is movably connected above the outer plates;

[0007] The inner valve body includes a valve core plate between the outer plate and the inner valve core plate, and an inner rod that penetrates the outer tube is movably connected above the valve core plate.

[0008] The outer plate is provided with several through-holes, and the valve core plate horizontally covers all the through-holes.

[0009] Preferably, the gate valve housing includes a water supply pipe body sleeved outside the valve core assembly and an upper housing located above the water supply pipe body and connected by a sealing flange;

[0010] The water supply pipe is equipped with a sealing ring inside, the upper shell is penetrated by the outer pipe, and the upper shell and the outer pipe are threaded together.

[0011] Preferably, the end of the upper shell away from the water supply pipe is connected by a fixing bolt to a limiting member placed above the outer pipe and penetrated by the inner rod; the fixing bolts are circumferentially distributed on the outside of the outer pipe and fixed to the upper shell, and the inner rod is threadedly engaged with the limiting member.

[0012] Preferably, the outer plates are provided with a sealing ring corresponding to the sealing rubber ring on the side that is far apart from each other, and the top of the outer plates is provided with a clip that can be movably engaged with the outer tube body.

[0013] Preferably, the outer tube body has symmetrically distributed through holes on one side wall near the outer plate, and the through holes are rectangular and correspond to the thickness of the valve core plate.

[0014] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages compared with the prior art:

[0015] This utility model achieves fluid filtration through the sieve holes of the outer plate, preventing impurities from affecting the seal and pipeline unobstructed flow; the outer tube body and the upper shell are threadedly engaged, allowing for fine adjustment of the outer plate, ensuring a tight fit between the sealing ring and the sealing rubber ring; when the valve core plate is closed, the outer plate is squeezed to further enhance the seal, adapting to high-pressure conditions; the inner rod body and the limit piece are threadedly engaged, driving the valve core plate to rise and fall, adjusting the sieve hole conduction area, and achieving precise and stable flow control. The overall structure achieves synergistic optimization of filtration, sealing, and regulation.

[0016] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the installation state of a filter gate valve according to the present invention.

[0018] Figure 2 This is an exploded view of a filter gate valve according to the present invention.

[0019] Figure 3 This is an elevation view of the valve core structure of a filter gate valve according to this utility model;

[0020] Figure 4 This is an elevation view of the inner and outer valve bodies of a filter gate valve according to this utility model.

[0021] As shown in the figure:

[0022] 1. Gate valve body;

[0023] 11. Water supply pipe body; 12. Upper shell; 13. Limiting component;

[0024] 2. Valve core assembly;

[0025] 21. Outer valve body; 22. Inner valve body; 23. Outer plate; 24. Outer tube body; 25. Valve core plate; 26. Inner rod body; 27. Screen hole; 28. Clamping device; 29. ​​Through hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] As shown in the figure, a filter gate valve includes a gate valve body 1, which has a valve core assembly 2 inside. The valve core assembly 2 includes an outer valve body 21 and an inner valve body 22. The outer valve body 21 includes a pair of outer plates 23 placed on both sides of the inner valve body 22. An outer tube 24 is movably connected above the outer plates 23. The inner valve body 22 includes a valve core plate 25 located between the outer plates 23. An inner rod 26 that penetrates the outer tube 24 is movably connected above the valve core plate 25. The outer plates 23 are provided with a plurality of screen holes 27 that penetrate themselves. The horizontal projection of the valve core plate 25 covers all the screen holes 27. The gate valve body 1 includes a water supply pipe 11 sleeved outside the valve core assembly 2 and an upper shell 12 located above the water supply pipe 11 and connected by a sealing flange.

[0030] In this embodiment, the water supply pipe 11 provides a stable installation space for the valve core assembly 2 through a sleeve structure. The upper shell 12 forms a sealed shell structure with the water supply pipe 11 through a sealing flange, ensuring that the fluid does not leak. The outer plates 23 are symmetrically distributed on both sides of the valve core plate 25. The movable connection between the outer pipe 24 and the outer plate 23 provides support for the outer plate 23 while retaining fine-tuning space. The inner rod 26 passes through the movable connection between the outer pipe 24 and the valve core plate 25, realizing the lifting and lowering drive of the valve core plate 25 relative to the outer plate 23. From the perspective of implementation points and innovation, this structure integrates filtration and on / off regulation functions into the valve core assembly 2. The screen holes 27 of the outer plate 23 can directly filter impurities in the flowing fluid, solving the problem that existing gate valves require additional filters. Because the horizontal projection of the valve core plate 25 covers all the screen holes 27, its lifting and lowering can precisely control the conduction area of ​​the screen holes 27, realizing both flow regulation and complete fluid blocking, replacing the on / off function of the traditional single valve core. Each structure plays a significant role in solving the problem: the flange connection between the water supply pipe body 11 and the upper shell 12 strengthens the shell's sealing performance and prevents fluid leakage; the screen holes 27 of the outer plate 23 intercept impurities, preventing impurities from wearing down the valve core or clogging the pipeline; the cooperation between the valve core plate 25 and the inner rod body 26 enables smooth lifting and lowering, improves the accuracy of flow regulation, and forms a reliable flow interruption by covering the screen holes 27 when fully closed. The overall structure is simple and the functions are coordinated and efficient.

[0031] As shown in the figure, the water supply pipe 11 of the gate valve body 1 is provided with a sealing ring inside. The upper shell 12 is penetrated by the outer pipe 24 and the two are threadedly engaged. The end of the upper shell 12 away from the water supply pipe 11 is connected to a limiting member 13 placed above the outer pipe 24 and penetrated by the inner rod 26 through a fixing bolt distributed circumferentially outside the outer pipe 24. The inner rod 26 is threadedly engaged with the limiting member 13. The outer plate 23 is provided with a sealing ring corresponding to the sealing ring on the side away from each other. The top of the outer plate 23 is provided with a clip 28 that is movably engaged with the outer pipe 24. The side wall of the outer pipe 24 near the outer plate 23 is provided with symmetrically distributed rectangular through holes 29, and the through holes 29 correspond to the thickness of the valve core plate 25.

[0032] In this implementation scheme, the sealing rings and sealing rings correspond one-to-one to form a double sealing structure. The threaded engagement between the outer tube 24 and the upper housing 12 enables the outer tube 24 to drive the outer plate 23 for fine-tuning. The circumferential distribution of the fixing bolts ensures a stable connection between the limiting member 13 and the upper housing 12. The threaded engagement between the inner rod 26 and the limiting member 13 constitutes the lifting drive mechanism of the valve core plate 25. The clamp 28 enables the movable connection between the outer plate 23 and the outer tube 24 and restricts relative rotation. The rectangular through hole 29 is adapted to the thickness of the valve core plate 25 to form a lifting guide. From the perspective of implementation points and innovation, this structure solves the problem of easy leakage under high pressure by the corresponding cooperation of the "sealing rings + sealing rings". The double threaded engagement design (outer tube and upper housing, inner rod and limiting member) respectively realizes the fine-tuning of the outer plate and the precise driving of the valve core plate, taking into account both the sealing pre-tightening and the flow regulation accuracy. The cooperation between the clamp and the through hole ensures the movement stability of the valve core assembly. Each structure plays a significant role: the sealing ring and sealing ring fit together to improve sealing reliability and adapt to high-pressure conditions; the outer tube body and the upper shell are threadedly engaged to achieve pre-tightening of the outer plate seal; the inner rod body and the limit piece are threadedly engaged to drive the valve core plate to rise and fall smoothly; the clamping device prevents the outer plate and the outer tube body from offset relative to each other; the through hole guides the valve core plate to move in a straight line, avoiding lifting and lowering jams, and further optimizing the sealing performance and adjustment stability of the device.

[0033] Before installation, the inner wall of the connecting pipes must be cleaned with a wire brush to remove rust. The alignment of the pipe axis with the water supply pipe axis should be calibrated using a laser level. The water supply pipe can be made of ductile iron, the sealing rings are made of nitrile rubber, the valve core plate is made of 304 stainless steel, and the outer pipe and inner rod are made of 45 steel. When connecting the flanges, use a torque wrench to gradually tighten the fixing bolts in a symmetrical cross-shaped sequence until the preset torque value is reached. Before initial use, the air vent valve at the end of the pipe must be opened to release residual air from the system. Close the valve after continuous fluid flows out. During operation, the flow rate can be monitored in real time by an electromagnetic flowmeter connected to the bypass pipe. Adjust the flow rate clockwise according to the monitoring data. Alternatively, rotate the inner rod counterclockwise to adjust the height of the valve core plate. When regular maintenance is required, first close the shut-off valves of the pipelines before and after the device to cut off the fluid supply, and then release the remaining pressure in the housing through the pressure relief valve. When disassembling the valve core assembly, use an Allen wrench to unscrew the fixing bolts and remove the limit piece. Then, lift the inner rod upward to remove the entire valve core assembly. When checking for screen hole blockage, use a compressed air spray gun to blow and clean the screen holes. Before replacing the seal, clean the residual impurities in the sealing groove with alcohol swabs, and then lay the new seal according to the original size. For scenarios involving the transportation of high-temperature fluids, wrap an aluminum silicate fiber insulation layer around the outside of the water pipe to prevent heat loss from affecting the sealing performance.

[0034] Specifically, when installing the device, first measure the pipeline spacing to cut a connecting short pipe of suitable length, machine flange surfaces matching the water delivery pipe body at both ends of the short pipe, place asbestos rubber sealing gaskets between the flange contact surfaces, and gradually apply force in the order from the center to the edge when tightening bolts. During operation, the pressure in the housing is regularly monitored through the pressure sensor installed on the water delivery pipe body, and the pressure relief valve is automatically opened to reduce the pressure when the pressure exceeds the set threshold. During maintenance, a vernier caliper is used to check the wear amount of the sealing ring, and a new sealing ring shall be replaced in time when the wear amount exceeds 0.5 mm. For working conditions where fluid with a large amount of suspended particles is conveyed, a Y-type filter can be additionally installed at the front end of the device for pretreatment. Flow regulation is realized by rotating the handwheel at the top of the inner rod body, and anti-slip textures can be arranged on the surface of the handwheel to increase the gripping force. After installation is completed, a hydraulic test is carried out, with the test pressure being 1.5 times the working pressure. After keeping the pressure for 30 minutes, it is qualified if the pressure gauge reading does not drop and there is no leakage at the flange connection. In daily use, the fluid filtration condition can be checked by observing the transparent sight glass (if the pipeline is equipped with it), and the screen holes of the valve core assembly shall be cleaned in time by shutting down the machine when there is a large amount of impurity accumulated in the sight glass.

[0035] Although the present utility model has been disclosed as above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to that defined by the claims.

Claims

1. A filter-type gate valve comprising a gate valve housing (1), characterized in that: The gate valve housing (1) is provided with a valve core assembly (2) inside, the valve core assembly (2) including an outer valve body (21) and an inner valve body (22); The outer valve body (21) includes a pair of outer plates (23) placed on both sides of the inner valve body (22), and an outer tube body (24) is movably connected above the outer plates (23); The inner valve body (22) includes a valve core plate (25) between the outer plate (23) and an inner rod (26) that penetrates the outer tube (24) is movably connected above the valve core plate (25). The outer plate (23) is provided with a number of through-holes (27), and the valve core plate (25) is horizontally projected to cover all the through-holes (27).

2. A filter-type gate valve according to claim 1, characterized in that: The gate valve housing (1) includes a water supply pipe body (11) sleeved outside the valve core assembly (2) and an upper housing (12) located above the water supply pipe body (11) and connected by a sealing flange; The water supply pipe body (11) is provided with a sealing ring inside. The upper shell (12) is penetrated by the outer pipe body (24), and the upper shell (12) and the outer pipe body (24) are threadedly engaged.

3. A filter gate valve according to claim 2, characterized in that: The upper shell (12) is connected to a limiting member (13) above the outer pipe (24) and penetrated by the inner rod (26) by a fixing bolt at one end away from the water supply pipe (11); the fixing bolt is circumferentially distributed on the outside of the outer pipe (24) and fixed to the upper shell (12); the inner rod (26) is threadedly engaged with the limiting member (13).

4. A filter gate valve according to claim 2, characterized in that: The outer plate (23) is provided with a sealing ring on the side that is far away from each other, and the top of the outer plate (23) is provided with a clip (28) that is movably engaged with the outer tube body (24).

5. A filter gate valve according to claim 1, characterized in that: The outer tube (24) has symmetrically distributed through holes (29) on one side wall near the outer plate (23). The through holes (29) are rectangular and correspond to the thickness of the valve core plate (25).

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