Anti-deviation multi-stage sealing valve seat

Abstract

The utility model relates to the technical field of valves, in particular to an anti-deviation multistage sealing valve seat, which comprises a valve body, two valve seats and a valve core, the valve seats are clamped inside the valve body, a plurality of clamping grooves are arranged on the inner circumferential surface of the valve body, a plurality of clamping blocks are arranged on the valve seats, the clamping blocks and the valve seats are integrally formed, and the valve core is arranged on the valve body. The clamping block is clamped in the clamping groove, and the valve element is rotationally connected between the two valve seats. According to the utility model, the connection between the valve seat and the valve body is more stable through the matching of the clamping block and the clamping groove, and the possibility that the position of the valve seat deviates is reduced.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a multi-stage sealing valve seat that prevents deviation. Background Technology

[0002] A ball valve is a type of valve in which the opening and closing element (ball) is driven by the valve stem and rotates around the axis of the ball valve. It is a new type of valve that has been widely adopted in recent years. Ball valves are mainly used in pipelines for cutting off, distributing and changing the flow direction of the medium. They are widely used in various industries. In order to prevent leakage between the ball and the valve body, a valve seat is used as a sealing element to seal the gap. At the same time, the valve seat also plays a role in supporting and positioning the ball.

[0003] Currently, a Chinese utility model patent application with a publication date of April 30, 2024, and publication number CN220870128U, provides a valve seat for a soft-seal ball valve. The valve seat is an annular elastic element structure, installed between a valve body and a ball to achieve a gap seal. The valve body side has a horizontal first limiting surface and a vertical second limiting surface. The valve seat is provided with a first sealing surface for sealing with the ball side and a second sealing surface for sealing with the second limiting surface. The inner ring of the valve seat has an inwardly opening annular groove. The inner ring of the valve seat is axially divided by the annular groove to form a cantilever that contacts the ball side and a support arm that contacts the valve body side. The annular groove provides space for elastic deformation of the cantilever, and the support arm always abuts against the second limiting surface.

[0004] In a related technology, a valve seat for a soft-seal ball valve is used. The valve seat, ball, and valve body are all in contact with each other, and the connection is stable through mutual pressure. However, when the valve is subjected to vibration or impact, the valve seat may deviate from its original installation position, which reduces the valve's sealing performance. In particular, after long-term operation, the valve seat and ball will experience some mutual wear, and the gap between the two contact surfaces will increase, which will increase the possibility of valve seat deviation. Utility Model Content

[0005] This application provides a multi-stage sealing valve seat that prevents deviation, which can improve the technical problem of valve seats being prone to positional deviation in related technologies.

[0006] This application provides a multi-stage anti-displacement sealing valve seat, including: a valve body, a valve seat, and a valve core. There are two valve seats, each of which is snapped into the inside of the valve body. Multiple slots are formed on the inner circumferential surface of the valve body, and multiple locking blocks are provided on the valve seat. The locking blocks are integrally formed with the valve seat and are snapped into the slots. The valve core is rotatably connected between the two valve seats.

[0007] The technical solutions described above in this application embodiment have at least the following technical effects: the valve seat first engages with the groove inside the valve body through its own shape. After the valve is assembled, the valve body and the valve seat, and the valve seat and the valve core abut against each other to apply pressure, so that the valve seat and the valve core are fixed inside the valve body. At the same time, the locking block engages inside the locking groove, making the connection between the valve seat and the valve body more stable. This can prevent the valve seat from shaking or rotating, which would reduce the sealing between it and the valve core or valve body, thereby reducing the possibility of the valve seat deviating from its position.

[0008] The anti-deviation multi-stage sealing valve seat provided in this application embodiment can make the connection between the valve seat and the valve body more stable through the cooperation of the locking block and the locking groove, reducing the possibility of the valve seat position deviating.

[0009] In some embodiments, two grooves are formed on the outer surface of the valve core, and a limit pin is fixedly provided on the valve seat, the limit pin being slidably connected inside the groove.

[0010] In some embodiments, a first sealing groove is provided on the valve seat, and a first sealing ring is provided inside the first sealing groove, the first sealing ring abutting against the outer surface of the valve core.

[0011] In some embodiments, the valve seat is further provided with a sealing mechanism, and the valve seat has a second sealing groove. The sealing mechanism includes a return component and a second sealing ring. The second sealing ring is slidably connected inside the second sealing groove and abuts against the outer surface of the valve core. The return component is used to continuously apply pressure to the second sealing ring so that the second sealing ring abuts against the valve core and seals.

[0012] In some embodiments, the recovery assembly includes a plurality of springs, each spring being disposed inside a second sealing groove, one end of each spring abutting against a valve seat, and the other end of each spring abutting against a second sealing ring.

[0013] In some embodiments, the recovery assembly further includes a first spring post and a second spring post, both of which are disposed inside the second sealing groove. One end of the first spring post is fixedly connected to the valve seat, and one end of the second spring post is fixedly connected to the side of the second sealing ring away from the valve core. The spring is sleeved on the first spring post and the second spring post.

[0014] In some embodiments, a cleaning ring is also fixedly disposed on the inner circumferential surface of the valve seat, and the cleaning ring abuts against the outer surface of the valve core. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of the anti-displacement multi-stage sealing valve seat provided in the embodiments of this application;

[0016] Figure 2 This is an exploded structural diagram of the anti-displacement multi-stage sealing valve seat provided in the embodiments of this application;

[0017] Figure 3 A cross-sectional view of the anti-displacement multi-stage sealing valve seat provided in an embodiment of this application;

[0018] Figure 4 for Figure 3 Enlarged view of section A in the middle.

[0019] The following are the labeling elements in the figure:

[0020] 1. Valve body; 11. Slot; 2. Valve seat; 21. Slot block; 22. Limit pin; 23. First sealing groove; 24. Second sealing groove; 3. Valve core; 31. Slide groove; 4. First sealing ring; 511. Spring; 512. First spring post; 513. Second spring post; 52. Second sealing ring; 6. Cleaning ring. Detailed Implementation

[0021] Based on this, in order to improve the problem of valve seat position deviation in related technologies, the embodiments of this application provide the following solution.

[0022] The following combination Figures 1 to 4 The present invention will be described in further detail below.

[0023] This embodiment discloses a multi-stage anti-displacement sealing valve seat: the multi-stage anti-displacement sealing valve seat includes a valve body 1, a valve seat 2 and a valve core 3. There are two valve seats 2, both of which are snapped into the valve body 1. Multiple slots 11 are opened on the inner circumferential surface of the valve body 1. Multiple locking blocks 21 are provided on the valve seat 2. The locking blocks 21 are integrally formed with the valve seat 2 and are snapped into the slots 11. The valve core 3 is rotatably connected between the two valve seats 2. Two sliding grooves 31 are opened on the outer surface of the valve core 3. A limit pin 22 is fixedly provided on the valve seat 2 and the limit pin 22 is slidably connected inside the sliding groove 31.

[0024] As can be seen from the above, the anti-deviation multi-stage sealing valve seat provided in this application embodiment first engages with the valve seat 2 through its own shape and the groove opened inside the valve body 1. After the valve is assembled, the valve body 1 and the valve seat 2, and the valve seat 2 and the valve core 3 abut against each other to apply pressure, so that the valve seat 2 and the valve core 3 are fixed inside the valve body 1. The contact surface between the valve seat 2 and the valve core 3 forms a seal. At the same time, the locking block 21 engages inside the locking groove 11, making the connection between the valve seat 2 and the valve body 1 more stable. When the valve is shaken or impacted, the possibility of the valve seat 2 deviating from its position is reduced. When the valve core 3 rotates, the valve core 3 will generate a phase between itself and the valve seat 2. Mutual friction occurs as the valve is used for a longer period of time, and the gap between the valve seat 2 and the valve core 3 will gradually increase. When the valve core 3 rotates, the valve core 3 and the valve seat 2 will wobble, which will intensify the friction between them. The cooperation between the locking block 21 and the locking groove 11 can reduce the amplitude of the wobble of the valve seat 2, reduce the wear rate between the valve seat 2 and the valve core 3, and improve the service life of the valve. When the valve core 3 rotates, the limiting pin 22 will slide relative to the slide groove 31 inside the slide groove 31, and at the same time, it will limit the position of the valve core 3, prevent the valve core 3 from deviating from its position and causing the valve core 3 to rotate poorly, and also make the connection between the valve core 3 and the valve seat 2 more stable.

[0025] In some embodiments, please refer to the following: Figure 3 and Figure 4 The valve seat 2 has a first sealing groove 23, and a first sealing ring 4 is provided inside the first sealing groove 23. The first sealing ring 4 abuts against the outer surface of the valve core 3.

[0026] With this configuration, the first sealing ring 4 will abut against the outer surface of the valve core 3 to form a seal, thereby enhancing the sealing performance between the valve core 3 and the valve seat 2.

[0027] Optionally, in some embodiments, please refer to Figure 3 and Figure 4 The valve seat 2 is also provided with a sealing mechanism. The valve seat 2 has a second sealing groove 24. The sealing mechanism includes a return component and a second sealing ring 52. The second sealing ring 52 is slidably connected inside the second sealing groove 24 and abuts against the outer surface of the valve core 3. The return component includes multiple springs 511, a first spring post 512 and a second spring post 513. All springs 511 are located inside the second sealing groove 24. One end of the spring 511 abuts against the valve seat 2 and the other end of the spring 511 abuts against the second sealing ring 52. The first spring post 512 and the second spring post 513 are both located inside the second sealing groove 24. One end of the first spring post 512 is fixedly connected to the valve seat 2, and one end of the second spring post 513 is fixedly connected to the side of the second sealing ring 52 away from the valve core 3. The springs 511 are sleeved on the first spring post 512 and the second spring post 513.

[0028] With this configuration, after the valve is assembled, the spring 511 applies pressure to the second sealing ring 52, causing the second sealing ring 52 to adhere tightly to the valve core 3 to form a seal. When the valve core 3 rotates, mutual wear occurs between the valve core 3 and the second sealing ring 52. The spring 511 ensures that the second sealing ring 52 continues to adhere tightly to the valve core 3 after a certain amount of wear, maintaining the sealing performance of the second sealing ring 52 and improving the service life of the valve. The first spring post 512 and the second spring post 513 can limit the position of the spring 511, preventing the spring 511 from shifting within the second sealing groove 24. This avoids the reduction in sealing performance caused by uneven force on the second sealing ring 52. When the first sealing ring 4 can no longer form an effective seal with the valve core 3 due to excessive wear, the valve body 1 can be opened and the valve core 3 can be removed. The second sealing ring 52 can be removed from the second sealing groove 24. If it is necessary to replace some of the springs 511 that have lost their elasticity, the springs 511 can be removed from the first spring post 512, and then a new spring 511 can be inserted. Then, the second spring posts 513 on the new second sealing ring 52 can be aligned with the first spring post 512 and the second sealing ring 52 can be placed into the second sealing groove 24.

[0029] Optionally, please refer to Figure 3 and Figure 4 A cleaning ring 6 is also fixedly installed on the inner circumferential surface of the valve seat 2, and the cleaning ring 6 abuts against the outer surface of the valve core 3.

[0030] With this configuration, various impurities will gradually adhere to the surface of the valve core 3 during use. When the valve core 3 rotates, these impurities will enter the gap between the valve seat 2 and the valve core 3, reducing the sealing performance between the valve seat 2 and the valve core 3 and accelerating the mutual wear between the valve seat 2 and the valve core 3. The cleaning ring 6 can scrape off the impurities on the surface of the valve core 3 when the valve core 3 rotates, allowing them to be flushed away by the fluid, preventing impurities from entering the gap between the valve seat 2 and the valve core 3 and preventing them from interfering with the normal operation of the valve.

[0031] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. Anti-deviation multi-stage sealing valve seat, characterized in that: The valve includes a valve body (1), a valve seat (2), and a valve core (3). There are two valve seats (2), each of which is snapped into the valve body (1). The valve body (1) has multiple slots (11) on its inner circumferential surface. The valve seat (2) has multiple locking blocks (21), each of which is integrally formed with the valve seat (2) and is snapped into the slots (11). The valve core (3) is rotatably connected between the two valve seats (2).

2. The anti-deviation multi-stage sealing valve seat according to claim 1, characterized in that: Two grooves (31) are provided on the outer surface of the valve core (3), and a limit pin (22) is fixedly provided on the valve seat (2). The limit pin (22) is slidably connected inside the groove (31).

3. The anti-deviation multi-stage sealing valve seat according to claim 1, characterized in that: The valve seat (2) is provided with a first sealing groove (23), and a first sealing ring (4) is provided inside the first sealing groove (23). The first sealing ring (4) abuts against the outer surface of the valve core (3).

4. The anti-deviation multi-stage sealing valve seat according to any one of claims 1-3, characterized in that: The valve seat (2) is also provided with a sealing mechanism. The valve seat (2) has a second sealing groove (24). The sealing mechanism includes a return component and a second sealing ring (52). The second sealing ring (52) is slidably connected inside the second sealing groove (24). The second sealing ring (52) abuts against the outer surface of the valve core (3). The return component is used to continuously apply pressure to the second sealing ring (52) so that the second sealing ring (52) abuts against the valve core (3) and seals.

5. The anti-deviation multi-stage sealing valve seat according to claim 4, characterized in that: The recovery assembly includes multiple springs (511), each of which is disposed inside the second sealing groove (24). One end of each spring (511) abuts against the valve seat (2), and the other end of each spring (511) abuts against the second sealing ring (52).

6. The anti-deviation multi-stage sealing valve seat according to claim 5, characterized in that: The recovery assembly also includes a first spring post (512) and a second spring post (513). The first spring post (512) and the second spring post (513) are both disposed inside the second sealing groove (24). One end of the first spring post (512) is fixedly connected to the valve seat (2), and one end of the second spring post (513) is fixedly connected to the side of the second sealing ring (52) away from the valve core (3). The spring (511) is sleeved on the first spring post (512) and the second spring post (513).

7. The anti-deviation multi-stage sealing valve seat according to claim 6, characterized in that: A cleaning ring (6) is also fixedly provided on the inner circumferential surface of the valve seat (2), and the cleaning ring (6) abuts against the outer surface of the valve core (3).

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