A quick-change wedge gate valve

Abstract

The utility model discloses a quick changeable wedge gate valve, including the valve body, the valve body is equipped with the two limit protruding plate of two -sided inner wall on the communication pipeline symmetry integral forming, the integral forming of two -sided inner wall of valve body has four limit protruding, one end of limit protruding is linked with limit protruding plate, and the other end extends to the bottom of valve body, this quick changeable wedge gate valve passes through optimization structure design, and the valve seat replacement process is simplified significantly, need not to dismantle the valve cover, valve stem and wedge gate, just need to dismantle the base to take out old valve seat and install new valve seat, and the equipment downtime maintenance time is greatly shortened, and the system operating efficiency is promoted, the valve seat is through the sliding fit of limit protruding and limit recess, and the positioning effect of limit protruding plate and base is matched, need not repeatedly align bolt hole site, reduce the operation difficulty, guarantee assembly accuracy, and the integral structure integral forming and detachable fixed combination guarantee running stability, and also prolong the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of wedge gate valve technology, specifically a quick-change wedge gate valve. Background Technology

[0002] Wedge gate valves are commonly used shut-off devices in fluid transport systems. Due to their reliable sealing performance, they are widely used in petroleum, chemical, water supply and drainage and other fields. The valve seat, as the core sealing component of the gate valve, directly affects the sealing reliability and service life of the gate valve.

[0003] In existing wedge gate valves, the valve seat is often directly bolted to the inside of the valve body, such as the new type of wedge gate valve with replaceable seat disclosed in CN201620311789.7, or the wedge gate valve with replaceable seat disclosed in CN201320414752.3. In some designs, the valve seat fixing bolts can only be accessed after disassembling the valve cover, valve stem, and wedge gate.

[0004] When valve seats wear out or age due to prolonged use and need replacement, multiple steps must be performed sequentially, including disassembling the valve cover, removing the valve stem and wedge gate, and unscrewing the valve seat fixing bolts. This process is cumbersome and time-consuming. Installing a new valve seat requires repeatedly aligning the bolt holes and tightening the bolts, increasing the workload for operators and extending equipment downtime for maintenance, thus impacting the overall system efficiency. Therefore, there is an urgent need for a wedge gate valve structure that simplifies the valve seat replacement process. To this end, a quick-change wedge gate valve is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a quick-change wedge gate valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a quick-change wedge gate valve, comprising a valve body, wherein two limiting protrusions are integrally formed symmetrically on the inner walls of both sides of the valve body for connecting pipes, and four limiting protrusions are integrally formed on the inner walls of the other two sides of the valve body, wherein one end of each limiting protrusion is connected to the limiting protrusion and the other end extends to the bottom of the valve body. The valve body has two valve seats that are symmetrically slidably connected inside. The two valve seats have limiting grooves on their sides, and the limiting grooves are slidably connected to the outside of the limiting protrusion. The bottom of the valve body is fitted with a base for supporting the valve seat.

[0007] Preferably, the valve seat is provided with a sealing ring on the side near the valve body, and the two valve seats are provided with a beveled part on the adjacent side.

[0008] Preferably, the base includes a base plate, and the side of the base plate closest to the valve body has an integrally formed abutment plate for limiting the position of the valve seat.

[0009] Preferably, the outer side of the abutment plate is adapted to the inner side wall of the valve body, and the side of the abutment plate is provided with a sliding groove for adapting the limiting protrusion.

[0010] Preferably, the base plate is fixedly connected to the bottom of the valve body by bolts and a sealing gasket is installed.

[0011] Preferably, a valve cover is bolted to the top of the valve body, a valve stem is mounted on the valve cover, and a wedge gate is mounted at the bottom end of the valve stem.

[0012] Preferably, the two sides of the wedge-shaped gate are respectively adapted to two inclined surfaces.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: This quick-change wedge gate valve significantly simplifies the valve seat replacement process through optimized structural design. It eliminates the need to disassemble the valve cover, valve stem, and wedge gate; only the base needs to be removed to remove the old valve seat and install the new one, greatly shortening equipment downtime for maintenance and improving system operating efficiency. The valve seat, through the sliding cooperation of the limiting protrusion and limiting groove, combined with the positioning function of the limiting protrusion and the base, eliminates the need for repeated alignment of bolt holes, reducing operational difficulty and ensuring assembly accuracy. The sealing ring and sealing gasket, combined with the tight fit between the wedge gate and the inclined surface of the valve seat, form a multi-layered sealing structure, effectively improving sealing reliability and preventing media leakage. The integrated, one-piece molding and detachable fixing structure ensures operational stability and extends equipment lifespan, making it suitable for various applications in petroleum, chemical, and water supply and drainage industries. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a bottom view of the valve body of this utility model. Figure 4 This is a schematic diagram of the valve seat of this utility model; Figure 5 This is a schematic diagram of the structure of the base of this utility model; Figure 6 This is a schematic diagram of the limiting groove and limiting protrusion of this utility model.

[0015] In the diagram: 1. Valve body; 2. Valve cover; 3. Base; 31. Top plate; 32. Sliding groove; 33. Base plate; 4. Valve stem; 5. Valve seat; 51. Limiting groove; 52. Inclined surface; 6. Wedge gate; 7. Limiting protrusion; 8. Sealing ring; 9. Limiting protrusion. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Please see Figure 1-6 This utility model provides a technical solution: a quick-change wedge gate valve, including a valve body 1. The valve body 1 has two symmetrically integrally formed limiting protrusions 9 on the inner walls of both sides of the connecting pipe. The limiting protrusions 9 are used to limit the displacement of the valve seat 5. Four limiting protrusions 7 are integrally formed on the other two inner walls of the valve body 1. The four limiting protrusions 7 are symmetrically distributed, with one end connected to the limiting protrusion 9 and the other end extending along the inner wall of the valve body 1 to the bottom of the valve body 1, forming a guiding and supporting structure for the valve seat 5. Two valve seats 5 are symmetrically slidably connected inside the valve body 1, corresponding to the two sides of the valve body 1 respectively. Limiting grooves 51 matching the limiting protrusions 7 are opened on their sides. The limiting grooves 51 are slidably connected to the outside of the limiting protrusions 7, realizing precise sliding of the valve seat 5 along the limiting protrusions 7. The bottom of the valve body 1 is equipped with a base 3 for abutting the valve seat 5. The base 3 is fixedly engaged with the bottom of the valve body 1, and the bottom position of the valve seat 5 is fixed by abutting action to ensure the stability of the valve seat 5 after assembly.

[0018] like Figure 2 , Figure 3 and Figure 4 As shown: A sealing ring 8 is provided on the side of the valve seat 5 near the valve body 1. The sealing ring 8 fits tightly against the contact surface between the valve seat 5 and the valve body 1, enhancing the sealing performance between the two and preventing media leakage. An inclined surface 52 is provided on the adjacent side of the two valve seats 5. The inclined surface 52 is designed to fit snugly with the wedge gate 6, improving the sealing effect when the gate valve is closed.

[0019] like Figure 5 As shown: The base 3 includes a base plate 33, which is a horizontal plate structure. A top plate 31 is integrally formed on the side near the valve body 1 to limit the position of the valve seat 5. The top plate 31 is perpendicular to the base plate 33, and its top is in close contact with the bottom of the valve seat 5, limiting the downward displacement of the valve seat 5 through the abutting force. The outer contour of the top plate 31 is perfectly matched with the inner wall of the valve body 1, ensuring a tight fit between the top plate 31 and the inner wall of the valve body 1, improving assembly sealing. The side of the top plate 31 is provided with a sliding groove 32 that matches the limiting protrusion 7. The size of the sliding groove 32 matches the limiting protrusion 7, allowing the top plate 31 to be precisely positioned along the limiting protrusion 7 during installation, ensuring the accuracy of the base 3 assembly.

[0020] like Figure 5 As shown: The bottom of the base plate 33 and the bottom of the valve body 1 are fixedly connected by bolts. The bolts are evenly distributed along the edge of the base plate 33 to achieve a firm fixation between the base plate 33 and the valve body 1. A sealing gasket is installed between the two connecting surfaces. The sealing gasket is pressed between the bottom of the base plate 33 and the bottom of the valve body 1 to further enhance the sealing performance of the connection between the base 3 and the valve body 1 and prevent the medium from leaking from the connection.

[0021] like Figure 1 and Figure 2 As shown: A valve cover 2 is bolted to the top of the valve body 1. The bolts are evenly distributed on the connecting edge between the valve cover 2 and the valve body 1, so as to achieve detachable fixing of the valve cover 2 and the valve body 1. A valve stem 4 is installed through the valve cover 2. The valve stem 4 and the valve cover 2 are sealed and rotated to ensure the sealing when the valve stem 4 rotates. A wedge gate 6 is installed at the bottom of the valve stem 4. The wedge gate 6 moves up and down with the valve stem 4 to control the opening and closing of the gate valve.

[0022] like Figure 2 As shown: The two sides of the wedge gate 6 are respectively adapted to the inclined surfaces 52 of the two valve seats 5. The inclination angles of the two sides of the wedge gate 6 are consistent with the inclination angles of the inclined surfaces 52. When the gate valve is closed, the two sides of the wedge gate 6 are tightly fitted with the inclined surfaces 52 to form a double sealing structure, which improves the sealing reliability of the gate valve.

[0023] Working principle: When the gate valve is working normally, rotating the valve stem 4 drives the wedge gate 6 to move up and down along the inside of the valve body 1, thereby controlling the opening and closing of the gate valve. In the closed state, the two sides of the wedge gate 6 are tightly fitted with the inclined surfaces 52 of the two valve seats 5, ensuring reliable sealing. In the open state, the valve stem 4 drives the wedge gate 6 to rise and disengage from the inclined surfaces 52, allowing the medium to flow along the internal channel of the valve body 1.

[0024] When it is necessary to replace the valve seat 5, unscrew the bolts connecting the base plate 33 to the bottom of the valve body 1, remove the base plate 33 and the integrally formed top plate 31, and release the top fixing of the valve seat 5. Then, slide the two old valve seats 5 down to the bottom along the limiting protrusion 7 on the inner wall of the valve body 1, so that the limiting groove 51 of the valve seat 5 disengages from the limiting protrusion 7, and then remove the old valve seats 5 from the bottom opening of the valve body 1. Next, align the limiting groove 51 of the new valve seat 5 with the limiting protrusion 7 inside the valve body 1, and slide it upward along the limiting protrusion 7 until the top of the valve seat 5 fits against the limiting protrusion 9, completing the positioning of the new valve seat 5. Finally, align the sliding groove 32 of the top plate 31 with the limiting protrusion 7, place the base 3, and fix the base plate 33 to the bottom of the valve body 1 with bolts to ensure that the sealing gasket is pressed tightly, thus completing the replacement of the valve seat 5.

[0025] 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 quick-change wedge gate valve, comprising a valve body (1), characterized in that: The valve body (1) has two symmetrically integrally formed limiting protrusions (9) on the inner walls of the two sides of the connecting pipe, and four limiting protrusions (7) integrally formed on the inner walls of the other two sides of the valve body (1). One end of the limiting protrusion (7) is connected to the limiting protrusion (9), and the other end extends to the bottom of the valve body (1). The valve body (1) has two valve seats (5) symmetrically slidably connected inside. The two valve seats (5) have a limiting groove (51) on their sides. The limiting groove (51) is slidably connected to the outside of the limiting protrusion (7). The bottom of the valve body (1) is fitted with a base (3) for abutting against the valve seat (5).

2. The quick-change wedge gate valve according to claim 1, characterized in that: The valve seat (5) is provided with a sealing ring (8) on the side near the valve body (1), and the two valve seats (5) are provided with a beveled part (52) on the adjacent side.

3. The quick-change wedge gate valve according to claim 1, characterized in that: The base (3) includes a base plate (33), on the side of the base plate (33) near the valve body (1) an abutment plate (31) for limiting the position of the valve seat (5) is integrally formed.

4. A quick-change wedge gate valve according to claim 3, characterized in that: The outer side of the abutment plate (31) is adapted to the inner side wall of the valve body (1), and the side of the abutment plate (31) is provided with a sliding groove (32) adapted to the limiting protrusion (7).

5. A quick-change wedge gate valve according to claim 3, characterized in that: The bottom plate (33) is fixedly connected to the bottom of the valve body (1) by bolts and is equipped with a sealing gasket.

6. A quick-change wedge gate valve according to claim 2, characterized in that: A valve cover (2) is bolted to the top of the valve body (1), a valve stem (4) is mounted on the valve cover (2), and a wedge gate (6) is mounted at the bottom of the valve stem (4).

7. A quick-change wedge gate valve according to claim 6, characterized in that: The two sides of the wedge gate (6) are respectively adapted to the two inclined surfaces (52).

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