Detachable valve sleeve capable of enhancing sealing performance

Abstract

The utility model relates to the technical field of valves, and discloses a detachable valve sleeve capable of enhancing sealing performance, which comprises a valve body, a valve cover fixedly mounted on the valve body, a valve rod fixedly mounted on the valve cover, a plurality of shaft seats fixedly mounted on the outer side of the valve rod, a stud rotationally connected onto the shaft seats, a pressing seat in threaded connection onto the stud, a shaft groove formed in the valve rod, and a sealing ring fixedly mounted on the shaft groove. A valve sleeve is movably installed in the shaft groove and comprises a T-shaped positioning block, and a limiting ring is movably installed at the lower end of the T-shaped positioning block. The valve sleeve is installed in the shaft groove, the shaft groove is composed of the T-shaped positioning block, the limiting ring, the pressure cover, the lantern ring, the movable sealing ring, the pressure ring and the like, double sealing can be achieved through matching of the limiting ring, the pressure cover and the lantern ring, the static sealing ring and the movable sealing ring, and the movable sealing ring is internally provided with the air cavity and the V-shaped groove. A pressure ring and a second compression spring are matched, so that the inner side of the movable sealing ring always keeps certain pressure to be tightly attached to the outer side of the valve rod, the sealing effect is improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a detachable valve sleeve with enhanced sealing performance. Background Technology

[0002] As a key component for controlling the flow of fluid media, the performance of valves directly affects the safe and stable operation of the entire system. Valve sleeves, as an important part of valves, play a crucial role in the sealing performance of valves.

[0003] Traditional valve sleeves, in practical use, have relatively simple sealing structures, often relying on a single sealing method. This makes it difficult to effectively cope with pressure changes and media erosion under complex working conditions, resulting in poor sealing performance and easy leakage. This not only wastes resources but may also cause safety hazards. Furthermore, due to insufficient sealing performance, existing valve sleeves experience accelerated wear during frequent opening and closing operations, leading to a shorter service life and the need for frequent replacement. This undoubtedly increases equipment maintenance costs and downtime, reducing production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a detachable valve sleeve with enhanced sealing performance, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A detachable valve sleeve with enhanced sealing performance includes a valve body, a valve cover fixedly mounted on the valve body, a valve stem fixedly mounted on the valve cover, multiple shaft seats fixedly mounted on the outer side of the valve stem, a stud rotatably connected to the shaft seat, a pressure seat threadedly connected to the stud, a shaft groove formed inside the valve stem, and a valve sleeve movably mounted in the shaft groove. The valve sleeve includes a T-shaped positioning block, a limit ring movably mounted at the lower end of the T-shaped positioning block, a pressure cover movably mounted outside the limit ring, a collar movably mounted at the lower end of the pressure cover, an installation groove formed inside the collar, a dynamic sealing ring inserted into the installation groove, and a pressure ring movably mounted inside the dynamic sealing ring.

[0007] As a further preferred embodiment of this utility model, the lower end of the T-shaped positioning block is provided with a telescopic groove, and the lower end of the T-shaped positioning block is inserted into the shaft groove, while the lower end surfaces of the two pressure seats respectively abut against the T-shaped positioning block.

[0008] As a further preferred embodiment of this utility model, the upper end of the limiting ring is inserted into the telescopic groove, and a static sealing ring is inserted between the limiting ring, the pressure cover, and the collar, with the lower end face of the static sealing ring abutting against the collar. A first compression spring is also fitted on the outside of the limiting ring and the pressure cover, with the upper end of the first compression spring abutting against the lower end of the T-shaped positioning block and the lower end of the first compression spring abutting against the pressure cover. By installing the static sealing ring in the shaft groove through the limiting ring, the pressure cover, and the first compression spring, the lower end face of the static sealing ring can always maintain a certain pressure abutting against the pressure cover and the collar, thereby playing a role in rotational sealing.

[0009] As a further preferred embodiment of this utility model, a V-shaped groove is provided inside the dynamic sealing ring, and an air cavity is also provided near the V-shaped groove of the dynamic sealing ring. Multiple convex rings are fixedly installed on the inner side of the dynamic sealing ring.

[0010] As a further preferred embodiment of this utility model, the longitudinal cross-section of the pressure ring is rhomboid, a top ring is fixedly installed on the pressure ring, the lower end of the pressure ring is inserted into a V-groove, and a second compression spring is inserted and installed between the top ring and the top of the mounting groove. The dynamic sealing ring is provided with an air cavity and a V-groove, and the pressure ring and the second compression spring apply a continuous force towards the air cavity to the dynamic sealing ring, thereby enabling the inner side of the dynamic sealing ring to fit tightly and permanently against the outer side of the valve stem, thereby further improving the sealing effect.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] In this invention, the valve sleeve is installed in the shaft groove, which is composed of a T-shaped positioning block, a limiting ring, a pressure cover, a collar, a dynamic sealing ring, and a pressure ring. Double sealing can be achieved through the cooperation of the limiting ring, pressure cover, collar, static sealing ring, and dynamic sealing ring. The dynamic sealing ring is provided with an air chamber and a V-shaped groove, and together with the pressure ring and the second compression spring, the inner side of the dynamic sealing ring can always maintain a certain pressure and be tightly attached to the outer side of the valve stem, thereby improving the sealing effect and service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the valve body structure of this utility model;

[0014] Figure 2 This is a sectional view of the valve body of this utility model;

[0015] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0016] Figure 4 This is a sectional view of the valve sleeve of this utility model;

[0017] Figure 5 This is a cross-sectional view of the dynamic sealing ring and pressure ring of this utility model.

[0018] In the diagram: 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Shaft seat; 5. Stud; 6. Pressure seat; 7. Shaft groove; 8. Valve sleeve; 9. T-shaped positioning block; 10. Limiting ring; 11. Pressure cover; 12. Collar ring; 13. Dynamic sealing ring; 14. Pressure ring; 15. Expansion groove; 16. Static sealing ring; 17. First compression spring; 18. Mounting groove; 19. Air chamber; 20. Convex ring; 21. V-groove; 22. Top ring; 23. Second compression spring. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] like Figures 1-5 As shown, the present invention provides a detachable valve sleeve with enhanced sealing performance, comprising a valve body 1, a valve cover 2 fixedly mounted on the valve body 1, a valve column 3 fixedly mounted on the valve cover 2, multiple shaft seats 4 fixedly mounted on the outside of the valve column 3, a stud 5 rotatably connected to the shaft seat 4, a pressure seat 6 threadedly connected to the stud 5, a shaft groove 7 opened in the valve column 3, a valve sleeve 8 movably mounted in the shaft groove 7, the valve sleeve 8 including a T-shaped positioning block 9, a limit ring 10 movably mounted at the lower end of the T-shaped positioning block 9, a pressure cover 11 movably mounted on the outside of the limit ring 10, a collar 12 movably mounted at the lower end of the pressure cover 11, an installation groove 18 opened in the collar 12, a dynamic sealing ring 13 inserted in the installation groove 18, and a pressure ring 14 movably mounted in the dynamic sealing ring 13.

[0021] like Figures 3-5As shown, the lower end of the T-shaped positioning block 9 has a telescopic groove 15, and the lower end of the T-shaped positioning block 9 is inserted into the shaft groove 7. The lower end faces of the two pressure seats 6 respectively abut against the T-shaped positioning block 9. The upper end of the limiting ring 10 is inserted into the telescopic groove 15. A static sealing ring 16 is inserted between the limiting ring 10, the pressure cover 11, and the collar 12, and the lower end face of the static sealing ring 16 abuts against the collar 12. A first compression spring 17 is also fitted on the outside of the limiting ring 10 and the pressure cover 11. The upper end of the first compression spring 17 abuts against the lower end of the T-shaped positioning block 9, and the lower end of the first compression spring 17 abuts against the pressure cover 11. By installing the static sealing ring 16 in the shaft groove 7 through the limiting ring 10, the pressure cover 11, and the first compression spring 17, the lower end face of the static sealing ring 16 can always maintain a certain pressure against the pressure cover. Between the 11 and the collar 12, a rotational seal is achieved. A V-groove 21 is provided inside the dynamic sealing ring 13, and an air chamber 19 is also provided near the V-groove 21. Multiple convex rings 20 are fixedly installed inside the dynamic sealing ring 13. The longitudinal section of the pressure ring 14 is rhomboid, and a top ring 22 is fixedly installed on the pressure ring 14. The lower end of the pressure ring 14 is inserted into the V-groove 21. A second compression spring 23 is inserted between the top ring 22 and the top of the mounting groove 18. The air chamber 19 and the V-groove 21 are provided inside the dynamic sealing ring 13, and the pressure ring 14 and the second compression spring 23 work together to apply a continuous force to the dynamic sealing ring 13 in the direction of the air chamber 19. This allows the inner side of the dynamic sealing ring 13 to fit tightly and permanently against the outer side of the valve stem with the convex rings 20, thereby further improving the sealing effect.

[0022] It should be noted that this utility model is a detachable valve sleeve with enhanced sealing performance. When installing the valve sleeve 8, the entire valve sleeve 8 can be inserted into the shaft groove 7. Then, the two studs 5 on the outside of the valve stem 3 are rotated around their corresponding shaft seats 4, causing the two studs 5 to rotate and insert one end of the pressure seat 6 into the valve stem 3 located above the T-shaped positioning block 9. Then, the nuts on the studs 5 are screwed down, gradually applying downward pressure to the pressure seat 6, causing the lower ends of the two pressure seats 6 to abut against the T-shaped positioning block 9, completing the installation of the entire valve sleeve 8. When the valve stem is inserted into... When the T-shaped positioning block 9 rotates within the static sealing ring 16 and the dynamic sealing ring 13, its top ring 22 is always subjected to a downward pressure applied by the second compression spring 23. This causes the top ring 22 to drive the pressure ring 14 to press down within the V-groove 21. Since the dynamic sealing ring 13 has an air chamber 19, the pressure of the pressure ring 14 inserted into the V-groove 21 is applied to the air chamber 19. This causes the gas in the air chamber 19 to transfer towards the convex ring 20, ensuring that the inner side of the convex ring 20 is always tightly fitted to the outer side of the valve stem, thus ensuring the sealing between the valve stem and the valve body 1 when the valve stem rotates.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A detachable valve sleeve with enhanced sealing performance, comprising a valve body (1), a valve cover (2) fixedly mounted on the valve body (1), a valve column (3) fixedly mounted on the valve cover (2), a plurality of bearing seats (4) fixedly mounted on the outside of the valve column (3), a stud (5) rotatably connected to the bearing seat (4), a pressure seat (6) threadedly connected to the stud (5), a shaft groove (7) formed in the valve column (3), and a valve sleeve (8) movably mounted in the shaft groove (7), characterized in that: The valve sleeve (8) includes a T-shaped positioning block (9), a limiting ring (10) is movably installed at the lower end of the T-shaped positioning block (9), a pressure cover (11) is movably installed on the outside of the limiting ring (10), a collar (12) is movably installed at the lower end of the pressure cover (11), an installation groove (18) is provided in the collar (12), a dynamic sealing ring (13) is inserted in the installation groove (18), and a pressure ring (14) is also movably installed in the dynamic sealing ring (13).

2. The detachable valve sleeve with enhanced sealing performance according to claim 1, characterized in that: The lower end of the T-shaped positioning block (9) is provided with a telescopic groove (15), and the lower end of the T-shaped positioning block (9) is inserted into the shaft groove (7), while the lower end surfaces of the two pressure seats (6) respectively abut against the T-shaped positioning block (9).

3. The detachable valve sleeve with enhanced sealing performance according to claim 2, characterized in that: The upper end of the limiting ring (10) is inserted into the telescopic groove (15). A static sealing ring (16) is inserted between the limiting ring (10), the pressure cover (11), and the collar (12). The lower end of the static sealing ring (16) abuts against the collar (12). A first compression spring (17) is also fitted on the outside of the limiting ring (10) and the pressure cover (11). The upper end of the first compression spring (17) abuts against the lower end of the T-shaped positioning block (9), and the lower end of the first compression spring (17) abuts against the pressure cover (11).

4. The detachable valve sleeve with enhanced sealing performance according to claim 1, characterized in that: The dynamic sealing ring (13) has a V-shaped groove (21) inside, and an air cavity (19) is also provided near the V-shaped groove (21) of the dynamic sealing ring (13). Multiple protruding rings (20) are fixedly installed on the inner side of the dynamic sealing ring (13).

5. A detachable valve sleeve with enhanced sealing performance according to claim 4, characterized in that: The longitudinal section of the pressure ring (14) is rhomboid. A top ring (22) is fixedly installed on the pressure ring (14). The lower end of the pressure ring (14) is inserted into the V-groove (21). A second compression spring (23) is inserted into the top of the top ring (22) and the mounting groove (18).

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