High-pressure-resistant double-layer sealing rubber valve seat

Abstract

The utility model discloses a high-pressure-resistant double-layer sealing rubber valve seat which comprises a rubber valve seat body, a replaceable rubber ring is installed on an inner ring of the rubber valve seat body, the replaceable rubber ring and the rubber valve seat body are detachably arranged, and the rubber valve seat body is installed in a valve body. Due to the fact that the connecting position of the two annular grooves is lower than the circle center of the section of the sealing ring, the inner wall of the valve body extrudes the sealing ring, the two sealing rings also extrude each other, the sealing rings can be installed on the inner wall of the valve body in an excessive extrusion mode, and the high-pressure-resistant degree and the sealing performance of the rubber valve seat body can be improved; due to the fact that the abrasion-resistant layer arranged on the liquid-phase rubber has certain rebound resilience, the abrasion-resistant layer is driven to elastically extrude and seal the valve element, the sealing performance is further improved, double-layer sealing of the rubber valve seat body is achieved, the rubber valve seat body is repaired through the operation of replacing the replaceable rubber ring, and the replacement cost of the rubber valve seat is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rubber valve seat technology, specifically a high-pressure resistant double-layer sealing rubber valve seat. Background Technology

[0002] Rubber valve seats are key sealing components in valves, primarily used to support the valve core and form a sealing pair. When the valve core is in the fully closed position, a seal is formed to prevent leakage of the medium in the pipeline. Most existing rubber valve seats are injection molded as a single piece, with the outer ring of the rubber valve seat contacting the inner wall of the valve to achieve a seal between the outer ring of the rubber valve seat and the inner wall of the valve. During use, the valve core will frequently squeeze and rub against the inner wall of the rubber valve seat, causing wear on the inner wall of the rubber valve seat. When the inner wall of the rubber valve seat is damaged, the entire rubber valve seat needs to be replaced, which is costly. Summary of the Invention

[0003] The purpose of this invention is to provide a high-pressure resistant double-layer sealing rubber valve seat to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure resistant double-layer sealing rubber valve seat, comprising a rubber valve seat body, wherein a replaceable rubber ring is installed on the inner ring of the rubber valve seat body, the replaceable rubber ring is detachably disposed from the rubber valve seat body, and the inner ring of the replaceable rubber ring is integrally injection molded and has a wear-resistant layer installed on it.

[0005] As a further preferred embodiment of this technical solution, annular grooves are provided at both ends of the outer ring of the rubber valve seat body, and sealing rings are installed inside the annular grooves.

[0006] As a further preferred embodiment of this technical solution, the position where the two annular grooves are connected is set below the center of the cross-section of the sealing ring.

[0007] As a further preferred embodiment of this technical solution, the inner ring of the rubber valve seat body is provided with an installation groove, and the replaceable rubber ring is installed inside the installation groove, with the replaceable rubber ring and the installation groove being interference-fitted.

[0008] As a further preferred embodiment of this technical solution, the rubber valve seat body is provided with semi-circular grooves arranged in a ring array with equal spacing around the radial central axis of the rubber valve seat body at the corresponding mounting groove position. The outer ring of the replaceable rubber ring is integrally injection molded with semi-circular protrusions arranged in a ring array with equal spacing around the radial central axis of the replaceable rubber ring. The semi-circular protrusions are housed inside the semi-circular grooves.

[0009] As a further preferred embodiment of this technical solution, the outer ring of the rubber valve seat body is integrally injection molded with a reinforcing ring in the middle.

[0010] As a further preferred embodiment of this technical solution, the wear-resistant layer is a liquid-phase rubber material.

[0011] This utility model provides a high-pressure resistant double-layer sealing rubber valve seat, which has the following beneficial effects:

[0012] (1) This utility model installs the sealing ring inside the annular groove and then installs the rubber valve seat body inside the valve body. Since the connection position of the two annular grooves is set below the center of the cross-section of the sealing ring, the inner wall of the valve body will squeeze the sealing ring during the installation of the rubber valve seat body, and the two sealing rings will also squeeze each other. The sealing ring can be over-squeezed and installed on the inner wall of the valve body, which can improve the high pressure resistance and sealing performance of the rubber valve seat body. When the rubber valve seat body is in use, by controlling the valve core to squeeze the wear-resistant layer, since the wear-resistant layer set by the liquid phase rubber has a certain elasticity, it will drive the wear-resistant layer to elastically squeeze the sealing valve core, further improving the sealing performance and realizing the double-layer sealing of the rubber valve seat body.

[0013] (2) This utility model uses the replacement of the replaceable rubber ring to repair the rubber valve seat body, thereby reducing the replacement cost of the rubber valve seat. Attached Figure Description

[0014] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0015] Figure 2 This is the second schematic diagram of the overall structure of this utility model;

[0016] Figure 3 This is a partial structural schematic diagram of the present invention;

[0017] Figure 4 for Figure 3 Decomposition state diagram;

[0018] In the diagram: 1. Rubber valve seat body; 2. Replaceable rubber ring; 3. Wear-resistant layer; 4. Ring groove; 5. Sealing ring; 6. Mounting groove; 7. Semi-circular groove; 8. Semi-circular protrusion; 9. Reinforcing ring. Detailed Implementation

[0019] 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.

[0020] This utility model provides a technical solution: such as Figures 1 to 4As shown in this embodiment, a high-pressure resistant double-layer sealing rubber valve seat includes a rubber valve seat body 1. A replaceable rubber ring 2 is installed on the inner ring of the rubber valve seat body 1. The replaceable rubber ring 2 is detachably installed from the rubber valve seat body 1. The inner ring of the replaceable rubber ring 2 is integrally injection molded with a wear-resistant layer 3. The wear-resistant layer 3 is made of liquid phase rubber material. By controlling the valve core to squeeze the wear-resistant layer 3, since the wear-resistant layer 3 made of liquid phase rubber has a certain resilience, it will drive the wear-resistant layer 3 to elastically squeeze and seal the valve core, thereby improving the sealing performance of the rubber valve seat body 1. The operation of replacing the replaceable rubber ring 2 is used to repair the rubber valve seat body 1, thereby reducing the replacement cost of the rubber valve seat.

[0021] like Figures 1 to 4 As shown, the outer ring of the rubber valve seat body 1 has annular grooves 4 at both ends, and a sealing ring 5 is installed inside the annular groove 4. The connection position of the two annular grooves 4 is set below the center of the cross-section of the sealing ring 5.

[0022] The sealing ring 5 is installed inside the annular groove 4, and then the rubber valve seat body 1 is installed inside the valve body. Since the connection position of the two annular grooves 4 is set below the center of the cross-section of the sealing ring 5, the inner wall of the valve body will squeeze the sealing ring 5 during the installation of the rubber valve seat body 1, and the two sealing rings 5 ​​will also squeeze each other. The sealing ring 5 can be excessively squeezed and installed on the inner wall of the valve body, which can improve the high pressure resistance and sealing performance of the rubber valve seat body 1.

[0023] like Figures 1 to 4 As shown, the inner ring of the rubber valve seat body 1 is provided with an installation groove 6, and the replaceable rubber ring 2 is installed inside the installation groove 6. The replaceable rubber ring 2 is installed with the installation groove 6 by interference fit.

[0024] The mounting slot 6 can be used to store and position the replaceable rubber ring 2, preventing the replaceable rubber ring 2 from protruding from the rubber valve seat body 1.

[0025] like Figures 1 to 4 As shown, the rubber valve seat body 1 is provided with semi-circular grooves 7 arranged in a ring array with equal spacing around the radial central axis of the rubber valve seat body 1 at the position corresponding to the mounting groove 6. The outer ring of the replaceable rubber ring 2 is provided with semi-circular protrusions 8 arranged in a ring array with equal spacing around the radial central axis of the replaceable rubber ring 2 and integrally injection molded. The semi-circular protrusions 8 are housed inside the semi-circular grooves 7.

[0026] After the replaceable rubber ring 2 is installed inside the mounting groove 6, the position of the replaceable rubber ring 2 can be further positioned by installing the semi-circular protrusion 8 inside the semi-circular groove 7.

[0027] like Figures 1 to 4 As shown, the outer ring of the rubber valve seat body 1 is integrally injection molded with a reinforcing ring 9.

[0028] The reinforcing ring 9 can improve the strength of the middle part of the rubber valve seat body 1.

[0029] This utility model provides a high-pressure resistant double-layer sealing rubber valve seat, the specific working principle of which is as follows:

[0030] When the device is in use, the sealing ring 5 is installed inside the annular groove 4, and then the rubber valve seat body 1 is installed inside the valve body. Since the connection position of the two annular grooves 4 is set below the center of the cross-section of the sealing ring 5, during the installation of the rubber valve seat body 1, the inner wall of the valve body will squeeze the sealing ring 5, and the two sealing rings 5 ​​will also squeeze each other. The sealing ring 5 can be over-squeezed and installed on the inner wall of the valve body, which can improve the high pressure resistance and sealing performance of the rubber valve seat body 1. When the rubber valve seat body 1 is in use, by controlling the valve core to squeeze the wear-resistant layer 3, since the wear-resistant layer 3 set by the liquid phase rubber has a certain elasticity, it will drive the wear-resistant layer 3 to elastically squeeze the sealing valve core, further improving the sealing performance and realizing the double-layer sealing of the rubber valve seat body 1.

[0031] When the valve core is compressed for a long time, the replaceable rubber ring 2 can be replaced to repair the rubber valve seat body 1, thereby reducing the replacement cost of the rubber valve seat.

[0032] 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 high pressure resistant double seal rubber valve seat comprising a rubber valve seat body (1) characterized in that: The inner ring of the rubber valve seat body (1) is equipped with a replaceable rubber ring (2), which is detachably mounted from the rubber valve seat body (1). The inner ring of the replaceable rubber ring (2) is integrally injection molded and equipped with a wear-resistant layer (3).

2. A high pressure resistant double seal rubber valve seat according to claim 1, characterized in that: The outer ring of the rubber valve seat body (1) is provided with annular grooves (4) at both ends, and a sealing ring (5) is installed inside the annular groove (4).

3. A high pressure resistant double seal rubber valve seat according to claim 2, characterized in that: The two annular grooves (4) are connected at a position lower than the center of the cross-section of the sealing ring (5).

4. A high pressure resistant double seal rubber valve seat according to claim 1, characterized in that: The inner ring of the rubber valve seat body (1) is provided with an installation groove (6), and the replaceable rubber ring (2) is installed inside the installation groove (6). The replaceable rubber ring (2) and the installation groove (6) are installed with an interference fit.

5. A high pressure resistant double seal rubber valve seat according to claim 4, characterized in that: The rubber valve seat body (1) is provided with semi-circular grooves (7) arranged in a ring array with equal spacing around the radial center axis of the rubber valve seat body (1) at the position corresponding to the mounting groove (6). The outer ring of the replaceable rubber ring (2) is provided with semi-circular protrusions (8) arranged in a ring array with equal spacing around the radial center axis of the replaceable rubber ring (2) and integrally injection molded. The semi-circular protrusions (8) are housed inside the semi-circular grooves (7).

6. A high pressure resistant double seal rubber valve seat according to claim 5, characterized in that: The outer ring of the rubber valve seat body (1) is integrally injection molded with a reinforcing ring (9).

7. A high pressure resistant double seal rubber valve seat according to claim 1, characterized in that: The wear-resistant layer (3) is a liquid phase rubber material.

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