Gate valve with improved bidirectional sealing performance

Abstract

The utility model discloses a gate valve with improved bidirectional sealing performance, which comprises a valve body, baffle rings are symmetrically arranged in the valve body, the outer side surfaces of the baffle rings are fixedly connected with the inner wall of the valve body, a gate plate is arranged on the inner sides of the baffle rings, an auxiliary pipeline is arranged above the gate plate, and the auxiliary pipeline is fixedly connected with the side surface of the valve body. Annular grooves are symmetrically formed in the surfaces of the two sides of the gate plate, sealing rings are fixedly connected to the surfaces of the inner sides of the annular grooves, a guide pipe is fixedly connected to the upper surface of the gate plate, the lower end of the guide pipe communicates with the annular grooves, the upper end of the guide pipe penetrates through the auxiliary pipeline to be connected with a hydraulic mechanism, and a driving mechanism is installed at the upper end of the auxiliary pipeline. The connecting flange is fixedly connected with the valve body. The problem that in the using process of a traditional gate valve, abrasion of a sealing ring on the gate plate sealing face is more and more serious is solved, the situation that the gate valve leaks due to the fact that the sealing performance of the gate plate is reduced after long-time use is avoided, the using sealing performance of the gate valve is improved, and the service life of the gate valve and the gate plate is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically to a gate valve with improved bidirectional sealing performance. Background Technology

[0002] A gate valve is a valve with a gate as its opening and closing element. The gate's movement is perpendicular to the fluid flow direction. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. The gate has two sealing surfaces. When the gate valve is closed, the sealing surfaces can be sealed solely by the pressure of the medium; this is called self-sealing. Most gate valves use forced sealing, meaning that when the valve is closed, external force is required to press the gate against the valve seat to ensure the sealing surface is tight.

[0003] Currently, in existing gate valves, the gate is generally equipped with a sealing ring on the sealing surface to enhance the sealing performance of the gate valve. However, during the use of the gate valve, friction will occur between the sealing surfaces on both sides of the gate and the valve body. As impurities in the water accumulate inside the valve body, the friction between the sealing surface of the gate and the valve body will increase. The existing sealing rings are generally fixed in structure and are usually in close contact with the valve body during use. As the friction increases, the wear on the sealing rings becomes more severe during the use of the gate valve, thus gradually reducing the sealing performance of the gate valve and shortening the service life of the gate. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a gate valve with improved bidirectional sealing performance. It solves the problem of increasingly severe wear of the sealing ring on the gate sealing surface during the use of traditional gate valves, and avoids leakage caused by reduced gate sealing performance after long-term use. Therefore, it improves the sealing performance of the gate valve and extends the service life of the gate valve and the gate plate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gate valve with improved bidirectional sealing performance, comprising a valve body, wherein symmetrical retaining rings are arranged inside the valve body, and the outer surface of the retaining rings is fixedly connected to the inner wall of the valve body; a gate plate is provided on the inner side of the retaining rings, and a secondary pipe is provided above the gate plate; the secondary pipe is fixedly connected to the side surface of the valve body; annular grooves are symmetrically formed on both sides of the gate plate, and a sealing ring is fixedly connected to the inner surface of the annular groove; a guide tube is fixedly connected to the upper surface of the gate plate, and the lower end of the guide tube communicates with the annular groove; the upper end of the guide tube passes through the secondary pipe and is connected to a hydraulic mechanism; a drive mechanism is installed at the upper end of the secondary pipe; and connecting flanges are symmetrically provided at both ends of the valve body, and the connecting flanges are fixedly connected to the valve body.

[0006] Preferably, a sealing groove is formed on one side surface of the retaining ring, and the sealing groove corresponds to the sealing ring.

[0007] Preferably, the driving mechanism includes a threaded sleeve, and a handle is fixedly connected to the upper end of the threaded sleeve. The lower end side surface of the threaded sleeve is rotatably connected to the secondary pipe, and a lead screw is threadedly connected inside the threaded sleeve. The lower end of the lead screw is rotatably connected to the upper surface of the gate plate.

[0008] Preferably, the hydraulic mechanism includes a hydraulic cylinder, and a pressure plate is slidably connected inside the hydraulic cylinder. A screw is rotatably connected to the upper surface of the pressure plate, and the upper end of the screw passes through the hydraulic cylinder and is threadedly connected. The hydraulic cylinder is filled with hydraulic oil, and the hydraulic oil is located below the pressure plate.

[0009] Preferably, the sealing ring is provided with limiting rings on both the inner and outer sides, and the limiting rings are fixedly connected to the side surface of the gate.

[0010] Preferably, positioning rings are fixedly connected to the inner walls of both ends of the valve body, and elastic telescopic rods are fixedly installed on the inner surface of the positioning rings. One end of the elastic telescopic rod is fixedly connected to a buffer plate through a support plate.

[0011] This invention provides a gate valve with improved bidirectional sealing performance. Compared with the prior art, it has the following advantages:

[0012] Beneficial effects:

[0013] 1. By using symmetrically opened annular grooves on both sides of the gate plate and sealing rings fixedly connected inside the annular grooves, and conduits fixedly connected to the upper surface of the gate plate and hydraulic mechanisms connected to one end of the conduits, the problem of increasingly severe wear of the sealing rings on the gate plate sealing surface during the use of traditional gate valves is solved. This avoids the situation where the gate plate's sealing performance decreases after long-term use, leading to gate valve leakage. Therefore, the sealing performance of the gate valve is improved, and the service life of the gate valve and the gate plate is extended.

[0014] 2. The screw and the pressure plate connected to the lower end of the screw in the hydraulic mechanism allow the operator to easily adjust the sealing between the gate and the valve body according to the liquid pressure in the pipeline, which improves the flexibility of the gate valve and enhances its practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the valve body in this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the gate in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the buffer plate in this utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the hydraulic cylinder in this utility model.

[0020] In the diagram: 1. Valve body; 101. Connecting flange; 2. Secondary pipe; 201. Handle; 202. Threaded sleeve; 203. Screw; 204. Gate; 2041. Annular groove; 2042. Limiting ring; 2043. Sealing ring; 205. Retaining ring; 2051. Sealing groove; 3. Hydraulic cylinder; 301. Screw; 302. Pressure plate; 303. Guide tube; 4. Buffer plate; 401. Support plate; 402. Elastic telescopic rod; 403. Positioning ring. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a gate valve with improved bidirectional sealing performance, comprising a valve body 1, wherein symmetrically arranged retaining rings 205 are arranged inside the valve body 1, and the outer surface of the retaining rings 205 is fixedly connected to the inner wall of the valve body 1; a gate plate 204 is provided on the inner side of the retaining rings 205, and a secondary pipe 2 is provided above the gate plate 204, the secondary pipe 2 being fixedly connected to the side surface of the valve body 1; symmetrically opened annular grooves 2041 are provided on both sides of the gate plate 204, and the inner surface of the annular grooves 2041 is fixedly connected to... A sealing groove 2051 is provided on one side surface of the sealing ring 2043 and the retaining ring 205, and the sealing groove 2051 corresponds to the sealing ring 2043. A conduit 303 is fixedly connected to the upper surface of the gate plate 204, and the lower end of the conduit 303 is connected to the annular groove 2041. The upper end of the conduit 303 passes through the secondary pipe 2 and is connected to a hydraulic mechanism. A drive mechanism is installed at the upper end of the secondary pipe 2. Connecting flanges 101 are symmetrically provided at both ends of the valve body 1, and the connecting flanges 101 are fixedly connected to the valve body 1.

[0023] As a technical optimization of this utility model, the driving mechanism includes a threaded sleeve 202, and a handle 201 is fixedly connected to the upper end of the threaded sleeve 202. The lower end side surface of the threaded sleeve 202 is rotatably connected to the secondary pipe 2. A screw 203 is threadedly connected inside the threaded sleeve 202. The lower end of the screw 203 is rotatably connected to the upper surface of the gate 204. The gate 204 can be driven to move up and down through the threaded sleeve 202, the screw 203 and the handle 201, which makes it convenient for the staff to open or close the gate valve.

[0024] As a technical optimization of this utility model, the hydraulic mechanism includes a hydraulic cylinder 3, and a pressure plate 302 is slidably connected inside the hydraulic cylinder 3. A screw 301 is rotatably connected to the upper surface of the pressure plate 302, and the upper end of the screw 301 passes through the hydraulic cylinder 3 and is threadedly connected to the hydraulic cylinder 3. The hydraulic cylinder 3 is filled with hydraulic oil, and the hydraulic oil is located below the pressure plate 302. The pressure plate 302 and the screw 301 inside the hydraulic cylinder 3 can push the hydraulic oil inside the hydraulic cylinder 3 to fill the sealing ring 2043, which can improve the sealing performance between the sealing ring 2043 and the retaining ring 205. At the same time, when the gate 204 is opened, the hydraulic oil can be returned to the hydraulic cylinder 3 when the sealing ring 2043 is squeezed.

[0025] As a technical optimization of this utility model, positioning rings 403 are fixedly connected to the inner walls of both ends of the valve body 1, and elastic telescopic rods 402 are fixedly installed on the inner surface of the positioning rings 403. One end of the elastic telescopic rods 402 is fixedly connected to a buffer plate 4 through a support plate 401. The buffer plate 4 and the elastic telescopic rods 402 can buffer the water flow, thereby reducing the impact force of the water flow on the gate 204.

[0026] As a technical optimization of this utility model, the sealing ring 2043 is provided with limiting rings 2042 on both the inner and outer sides, and the limiting rings 2042 are fixedly connected to the side surface of the gate plate 204. The limiting rings 2042 can limit the sealing ring 2043, thereby preventing the sealing ring 2043 from expanding to both sides during the process of filling hydraulic oil into the annular groove 2041, and enabling the sealing ring 2043 to fully fit with the sealing groove 2051, further improving the sealing performance of the gate valve.

[0027] When this utility model is in use, if the gate plate 204 inside the valve body 1 is in the closed state, the operator needs to quickly rotate the screw 301 inside the hydraulic cylinder 3. The screw 301 will then push the pressure plate 302 downwards, which in turn will push hydraulic oil through the conduit 303 into the annular groove 2041, simultaneously expanding the sealing ring 2043 inside the annular groove 2041. During the expansion of the sealing ring 2043, the limiting ring 2042 will limit the sealing ring 2043, causing it to expand into the sealing groove 2051. This closes the valve body 1, completing the gate valve closing operation. To open the gate valve, the operator needs to rotate the screw 301 in the opposite direction. 1. At this time, the screw 301 drives the pressure plate 302 to move upward, so the hydraulic oil inside the annular groove 2041 will be pushed back into the hydraulic cylinder 3 by pressure. Then, the operator rotates the handle 201 and pulls up the gate 204 through the threaded sleeve 202 and the screw 203. During this process, when the sealing ring 2043 on the side surface of the gate 204 contacts the inner wall of the valve body 1, it will be squeezed and push the hydraulic oil inside the annular groove 2041 into the hydraulic cylinder 3. Therefore, the squeezing force between the sealing ring 2043 and the valve body 1 is reduced, and the friction between the valve body 1 and the sealing ring 2043 is also reduced, reducing the possibility of friction damage to the sealing ring 2043, and extending the service life of the valve body 1 and the gate 204.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[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 gate valve with improved bidirectional sealing performance, comprising a valve body (1), characterized in that: The valve body (1) is symmetrically provided with retaining rings (205) inside, and the outer surface of the retaining rings (205) is fixedly connected to the inner wall of the valve body (1). The inner side of the retaining rings (205) is provided with a gate (204), and a secondary pipe (2) is provided above the gate (204). The secondary pipe (2) is fixedly connected to the side surface of the valve body (1). The two sides of the gate (204) are symmetrically provided with annular grooves (2041), and the inner surface of the annular grooves (2041) is... A sealing ring (2043) is fixedly connected to the surface of the gate (204). A conduit (303) is fixedly connected to the upper surface of the gate (204), and the lower end of the conduit (303) is connected to the annular groove (2041). The upper end of the conduit (303) passes through the secondary pipe (2) and is connected to a hydraulic mechanism. A drive mechanism is installed at the upper end of the secondary pipe (2). Connecting flanges (101) are symmetrically provided at both ends of the valve body (1), and the connecting flanges (101) are fixedly connected to the valve body (1).

2. The gate valve with improved bidirectional sealing performance according to claim 1, characterized in that: A sealing groove (2051) is provided on one side surface of the retaining ring (205), and the sealing groove (2051) corresponds to the sealing ring (2043).

3. The gate valve with improved bidirectional sealing performance according to claim 1, characterized in that: The driving mechanism includes a threaded sleeve (202), and a handle (201) is fixedly connected to the upper end of the threaded sleeve (202). The lower end side surface of the threaded sleeve (202) is rotatably connected to the secondary pipe (2), and a lead screw (203) is threadedly connected inside the threaded sleeve (202). The lower end of the lead screw (203) is rotatably connected to the upper surface of the gate (204).

4. The gate valve with improved bidirectional sealing performance according to claim 1, characterized in that: The hydraulic mechanism includes a hydraulic cylinder (3), and a pressure plate (302) is slidably connected inside the hydraulic cylinder (3). A screw (301) is rotatably connected to the upper surface of the pressure plate (302), and the upper end of the screw (301) passes through the hydraulic cylinder (3) and is threadedly connected to the hydraulic cylinder (3). The hydraulic cylinder (3) is filled with hydraulic oil, and the hydraulic oil is located below the pressure plate (302).

5. The gate valve with improved bidirectional sealing performance according to claim 1, characterized in that: The sealing ring (2043) is provided with limiting rings (2042) on both the inner and outer sides, and the limiting rings (2042) are fixedly connected to the side surface of the gate (204).

6. The gate valve with improved bidirectional sealing performance according to claim 1, characterized in that: The valve body (1) has a positioning ring (403) fixedly connected to the inner wall of both ends, and an elastic telescopic rod (402) is fixedly installed on the inner surface of the positioning ring (403). One end of the elastic telescopic rod (402) is fixedly connected to a buffer plate (4) through a support plate (401).

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