Wear-resistant gate valve

Abstract

The utility model provides a wear-resistant gate valve, and belongs to the technical field of gate valves. The problem that an existing gate valve is short in service life is solved. The wear-resistant gate valve comprises a gate valve main body, a valve plate and a valve rod, a valve cover is arranged on the gate valve main body, and the wear-resistant gate valve is characterized in that a pressing cap is arranged on the valve cover, a movable space is formed between the valve cover and the pressing cap, a limiting part is arranged on the valve rod relative to the interior of the movable space, and the limiting part is arranged on the valve plate. A reset spring is arranged on the valve rod relative to the interior of the movable space in a sleeved mode, a plurality of gaskets are arranged on the valve rod and located at the upper end of the reset spring, one end of the reset spring abuts against the gaskets, and the other end of the reset spring abuts against the limiting part. The gasket is provided with a deformation part which deforms after being subjected to the acting force of the spring, and the deformation part is arranged in an upward and outward inclined mode. The utility model has the advantage of long service life.

Description

Technical Field

[0001] This utility model belongs to the field of gate valve technology, and relates to a gate valve, and particularly to a wear-resistant gate valve. Background Technology

[0002] A gate valve is a valve with a gate as its opening and closing element. The gate moves perpendicular to the direction of fluid flow. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. Gate valves achieve sealing through the contact between the valve seat and the gate.

[0003] Gate valves control the opening and closing of the valve by driving the valve stem. Existing gate valves usually have a spring on the valve stem between the valve cover and the pressure cap to reduce the force required to release the valve stem when opening the valve. Over time, the elasticity of the spring will decrease, which will further reduce the opening and closing effect of the valve. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a wear-resistant gate valve with a long service life.

[0005] The objective of this utility model can be achieved through the following technical solution: A wear-resistant gate valve includes a gate valve body, a valve plate, and a valve stem. A valve cover is provided on the gate valve body. The valve cover is characterized by having a pressure cap, forming a movable space between the valve cover and the pressure cap. A limiting part is provided on the valve stem relative to the movable space. A return spring is sleeved on the valve stem relative to the movable space. Several gaskets are provided on the valve stem above the return spring. One end of the return spring abuts against the gaskets, and the other end of the return spring abuts against the limiting part. The gaskets are provided with deformation parts that deform under the force of the spring, and the deformation parts are inclined upward and outward.

[0006] In the aforementioned wear-resistant gate valve, there are three gaskets. The gaskets and the deformable part are integrally formed. The gaskets and the deformable part are V-shaped as a whole, and the gaskets and the deformable part are elastic. When the deformable part is subjected to the force of the return spring, the deformable part will deform outward and gradually become straight.

[0007] In the aforementioned wear-resistant gate valve, two annular sealing grooves are provided on the valve cover at the contact point with the valve stem, and an O-ring is placed in each annular sealing groove to achieve a seal between the valve stem and the valve cover.

[0008] In the aforementioned wear-resistant gate valve, an annular sealing groove is provided on the pressure cap at the point of contact with the valve stem, and an O-ring is placed in the annular sealing groove to achieve a seal between the valve stem and the pressure cap.

[0009] Compared with existing technologies, this invention, by placing a shim on the return spring, allows the deformable portion of the shim to deform under the spring's force. When the valve is opened, the spring force causes the shim to gradually deform into a straight shape, distributing the force that the spring would normally compress. Upon opening, the shim returns to its V-shape, releasing the absorbed pressure and distributing the force absorbed by the return spring during this process. This improves the spring's lifespan and further extends the lifespan of the gate valve. Attached Figure Description

[0010] Figure 1 This is a cross-sectional structural diagram of the gate valve of this utility model when closed.

[0011] Figure 2 This is a cross-sectional structural diagram of the gate valve opening according to this utility model.

[0012] Figure 3 This is a cross-sectional structural diagram of the gasket of this utility model.

[0013] In the diagram, 1. Gate valve body; 2. Valve plate; 3. Valve stem; 4. Valve cover; 5. Pressure cap; 6. Movement space; 7. Limiting part; 8. Return spring; 9. Gasket; 10. Deformation part; 11. Annular sealing groove one; 12. O-ring; 13. Annular sealing groove two. Detailed Implementation

[0014] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0015] like Figure 1 , Figure 2 , Figure 3 As shown, this wear-resistant gate valve includes a gate valve body 1, a valve plate 2, and a valve stem 3. A valve cover 4 is provided on the gate valve body 1, and a pressure cap 5 is provided on the valve cover 4. An active space 6 is formed between the valve cover 4 and the pressure cap 5. A limiting part 7 is provided on the valve stem 3 and relative to the active space 6. A return spring 8 is sleeved on the valve stem 3 and relative to the active space 6. Several gaskets 9 are provided on the valve stem 3 and above the return spring 8. One end of the return spring 8 abuts against the gaskets 9, and the other end of the return spring 8 abuts against the limiting part 7. A deformation part 10 is provided on the gasket 9, which deforms under the action of the spring force. The deformation part 10 is inclined upward and outward.

[0016] To elaborate further, there are three gaskets 9. The gaskets 9 and the deformable part 10 are integrally formed. The gaskets 9 and the deformable part 10 are V-shaped as a whole. The gaskets 9 and the deformable part 10 are elastic. When the deformable part 10 is subjected to the force of the return spring 8, the deformable part 10 will deform outward and gradually become straight.

[0017] A washer 9 is provided on the return spring 8, and the deformable part 10 on the washer 9 will deform under the action of the spring. When the valve is opened, the valve stem 3 drives the return spring 8 to move upward through the limiting part 7, so that the spring washer 9 abuts against the pressure cap 5 and squeezes the washer 9. The spring force causes the washer 9 to gradually deform into a straight shape, sharing the force that the spring originally needed to compress. When the valve is closed, the valve stem 3 moves downward and the return spring 8 gradually returns to its original position, and the washer 9 returns to its V-shape, releasing the pressure that was originally absorbed. This shares the force that the return spring 8 has to bear in this process, improving the service life of the spring and further improving the service life of the gate valve.

[0018] To elaborate further, two annular sealing grooves 11 are provided on the valve cover 4 at the point of contact with the valve stem 3, and an O-ring 12 for sealing between the valve stem 3 and the valve cover 4 is placed in each annular sealing groove 11.

[0019] To elaborate further, an annular sealing groove 13 is provided on the pressure cap 5 at the point of contact with the valve stem 3, and an O-ring 12 for sealing between the valve stem 3 and the pressure cap 5 is placed in the annular sealing groove 13.

[0020] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0021] Although this document frequently uses terms such as gate valve body 1, valve plate 2, valve stem 3, valve cover 4, pressure cap 5, moving space 6, limiting part 7, return spring 8, gasket 9, deformation part 10, annular sealing groove one 11, O-ring 12, and annular sealing groove two 13, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A wear-resistant gate valve, comprising a gate valve body (1), a valve plate (2), and a valve stem (3), wherein a valve cover (4) is provided on the gate valve body (1), characterized in that, A pressure cap (5) is provided on the valve cover (4), and an active space (6) is formed between the valve cover (4) and the pressure cap (5). A limiting part (7) is provided on the valve stem (3) and relative to the active space (6). A return spring (8) is sleeved on the valve stem (3) and relative to the active space (6). Several gaskets (9) are provided on the valve stem (3) and located at the upper end of the return spring (8). One end of the return spring (8) abuts against the gasket (9), and the other end of the return spring (8) abuts against the limiting part (7). A deformation part (10) is provided on the gasket (9) that deforms after being subjected to the spring force. The deformation part (10) is inclined upward and outward.

2. The wear-resistant gate valve according to claim 1, characterized in that, There are three gaskets (9). The gaskets (9) and the deformable parts (10) are integrally formed. The gaskets (9) and the deformable parts (10) are V-shaped as a whole. The gaskets (9) and the deformable parts (10) are elastic. When the deformable parts (10) are subjected to the force of the return spring (8), the deformable parts (10) will deform outward and gradually become straight.

3. The wear-resistant gate valve according to claim 1, characterized in that, Two annular sealing grooves (11) are provided on the valve cover (4) and at the contact point with the valve stem (3). An O-ring (12) for sealing between the valve stem (3) and the valve cover (4) is placed in each annular sealing groove (11).

4. The wear-resistant gate valve according to claim 1, characterized in that, An annular sealing groove (13) is provided on the pressure cap (5) and at the contact point with the valve stem (3). An O-ring (12) for sealing between the valve stem (3) and the pressure cap (5) is placed in the annular sealing groove (13).

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