Novel valve rod sealing structure

Abstract

The utility model discloses a novel valve rod sealing structure, which relates to the technical field of valve rod sealing and comprises a valve rod body, a shell is arranged on the outer side of the valve rod body, the shell is fixedly connected to the top end of the valve rod body, a mounting block is fixedly connected to the bottom end in the shell, and a sealing rubber ring is mounted on the inner side of the mounting block. The sealing rubber ring is arranged on the outer side of the valve rod body in a sleeving mode, a V-shaped groove is formed in the middle of the sealing rubber ring, an extrusion ring is arranged in the V-shaped groove, the cross section of the extrusion ring is in a V shape, and a downward pressing assembly is arranged at the top end of the extrusion ring. The extrusion ring extrudes the sealing rubber ring to enable the sealing rubber ring to expand outwards towards the two sides, then the sealing rubber ring is tightly attached to the valve rod body and the installation block, the sealing performance is improved, and normal use of the valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valve stem sealing, in particular to a novel valve stem sealing structure. Background Art

[0002] The working principle of various existing valves is to turn the hand wheel of the valve so that the valve stem drives the gate core in the valve to control the opening and closing of the valve. The valve stem seal is generally provided with packing around the valve stem, and the packing is compressed by the packing pad and the packing cover to achieve the seal between the valve stem and the valve cover.

[0003] During use, the valve body needs to be opened and closed repeatedly several times, which causes the rotation of the valve stem to wear the packing, thereby increasing the gap between the valve stem and the packing, causing leakage and flushing problems, seriously affecting the normal use of the valve.

[0004] In order to solve the above problems, we have made improvements and proposed a new valve stem sealing structure. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model provides a novel valve stem sealing structure, comprising a valve stem body, an outer shell is arranged on the outer side of the valve stem body, and the outer shell is fixedly connected to the top end of the valve body, a mounting block is fixedly connected to the inner bottom end of the outer shell, a sealing rubber ring is installed on the inner side of the mounting block, and the sealing rubber ring is sleeved on the outer side of the valve stem body, a V-shaped groove is opened in the middle of the sealing rubber ring, an extrusion ring is arranged inside the V-shaped groove, and the cross section of the extrusion ring is V-shaped, and a pressing component is arranged on the top end of the extrusion ring.

[0007] As a preferred technical solution of the utility model, the pressing assembly includes an extension ring, the outer side of the extension ring is threadedly connected to a threaded pipe, and the threaded pipe is rotatably connected to the inside of the shell.

[0008] As a preferred technical solution of the utility model, the top end of the threaded tube is fixedly connected with a gear ring, the inner side of the gear ring is meshingly connected with a gear, the top end of the gear is fixedly connected with a connecting rod, the top end of the connecting rod is provided with a sleeve, and the sleeve passes through to the outside of the outer shell.

[0009] As a preferred technical solution of the utility model, a plurality of mounting grooves are evenly arranged along the circumferential surface of the top of the connecting rod, a spring is fixedly connected inside the mounting groove, a clamping block is fixedly connected to one end of the spring, and clamping grooves are evenly arranged along the circumferential surface inside the sleeve, and the clamping grooves cooperate with the clamping blocks.

[0010] As a preferred technical solution of the utility model, a connecting block is fixedly connected to the top end of the connecting rod, and the connecting block is rotatably connected to the inside of the sleeve.

[0011] As a preferred technical solution of the utility model, a protrusion is fixedly connected to the top end of the sleeve, and the protrusion is a regular hexagon.

[0012] The beneficial effects of the utility model are:

[0013] 1. In the utility model, the pressing assembly acts on the extrusion ring, so that the extrusion ring is embedded in the V-shaped groove of the sealing rubber ring. The sealing rubber ring is squeezed by the extrusion ring to expand outwards on both sides, and then closely fits with the valve stem body and the mounting block, thereby improving the sealing performance and ensuring the normal use of the valve.

[0014] 2. In the utility model, when the sealing rubber ring is tightly fitted with the valve stem body, the sleeve rotates, the card slot squeezes the card block so that the card block is retracted into the interior of the installation slot, and then the card slot passes over the card block, so that slippage occurs between the sleeve and the connecting rod, thereby preventing the extrusion ring from being embedded too much in the V-shaped groove, causing excessive extrusion of the sealing rubber ring and the valve stem body, and thus preventing the sealing rubber ring from being quickly worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a partial cross-sectional view of the utility model;

[0017] Figure 2 The utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 It is a cross-sectional view of the connecting rod of the utility model;

[0019] In the figure: 1. valve body; 2. valve stem body; 3. housing; 4. mounting block; 5. sealing rubber ring; 6. V-shaped groove; 7. extrusion ring; 8. extension ring; 9. threaded pipe; 10. gear ring; 11. gear; 12. connecting rod; 13. sleeve; 14. protrusion; 15. connecting block; 16. slot; 17. mounting slot; 18. spring; 19. block. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] Example: Figure 1-3 As shown, a novel valve stem sealing structure comprises a valve stem body 2, an outer shell 3 is arranged on the outer side of the valve stem body 2, and the outer shell 3 is fixedly connected to the top end of the valve body 1, a mounting block 4 is fixedly connected to the inner bottom end of the outer shell 3, a sealing rubber ring 5 is installed on the inner side of the mounting block 4, and the sealing rubber ring 5 is sleeved on the outer side of the valve stem body 2, a V-shaped groove 6 is opened in the middle of the sealing rubber ring 5, an extrusion ring 7 is arranged inside the V-shaped groove 6, and the cross section of the extrusion ring 7 is V-shaped, and a pressing component is arranged on the top of the extrusion ring 7, and the pressing component acts on the extrusion ring 7 to make the extrusion ring 7 embedded in the V-shaped groove 6 of the sealing rubber ring 5, and the sealing rubber ring 5 is expanded outward to both sides by squeezing the sealing rubber ring 5 through the extrusion ring 7, so as to fit closely with the valve stem body 2 and the mounting block 4, thereby improving the sealing performance and ensuring the normal use of the valve.

[0022] Specifically, Figure 2 and Figure 3 As shown, the pressing assembly includes an extension ring 8, the outer side of the extension ring 8 is threadedly connected to a threaded tube 9, and the threaded tube 9 is rotatably connected to the inside of the shell 3, the top of the threaded tube 9 is fixedly connected to a gear ring 10, the inner side of the gear ring 10 is meshingly connected to a gear 11, the top of the gear 11 is fixedly connected to a connecting rod 12, the top of the connecting rod 12 is provided with a sleeve 13, and the sleeve 13 penetrates to the outside of the shell 3, the outer surface of the extrusion ring 7 has a certain roughness to prevent the extension ring 8 from rotating, and the connecting rod 12 is driven to rotate by rotating the sleeve 13, and then the gear 11 drives the gear ring 10 to rotate, the rotating gear ring 10 drives the threaded tube 9 to rotate inside the shell 3, and the rotating threaded tube 9 acts on the outside of the extension ring 8, so that the extension ring 8 moves downward.

[0023] Specifically, Figure 3 As shown, a plurality of mounting grooves 17 are evenly arranged along the circumferential surface of the top of the connecting rod 12, a spring 18 is fixedly connected inside the mounting groove 17, a block 19 is fixedly connected at one end of the spring 18, and a slot 16 is evenly arranged along the circumferential surface of the inside of the sleeve 13, and the slot 16 cooperates with the block 19. When the sealing rubber ring 5 is completely sealed with the valve stem body 2 and the mounting block 4, the sealing rubber ring 5 will have a certain reaction force on the extrusion ring 7. When the sealing rubber ring 5 is tightly fitted with the valve stem body 2, the sleeve 13 rotates, and the slot 16 squeezes the block 19 so that the block 19 is retracted into the interior of the mounting groove 17, and then the slot 16 passes over the block 19, so that slippage occurs between the sleeve 13 and the connecting rod 12, so as to prevent the extrusion ring 7 from being excessively embedded in the V-groove 6, causing excessive extrusion of the sealing rubber ring 5 and the valve stem body 2, and thus preventing the sealing rubber ring 5 from being quickly worn.

[0024] Specifically, Figure 3As shown, a connecting block 15 is fixedly connected to the top of the connecting rod 12, and the connecting block 15 is rotatably connected to the inside of the sleeve 13. The connecting rod 12 is installed inside the sleeve 13 through the connecting block 15 to prevent the connecting rod 12 from detaching from the sleeve 13.

[0025] Specifically, Figure 2 As shown, a protrusion 14 is fixedly connected to the top of the sleeve 13, and the protrusion 14 is a regular hexagon. The regular hexagonal protrusion 14 can cooperate with a wrench to drive the sleeve 13 normally.

[0026] Working principle: by acting on the convex block 14 with a wrench, the rotating sleeve 13 drives the connecting rod 12 to rotate, and then the gear 11 drives the gear ring 10 to rotate, and the rotating gear ring 10 drives the threaded tube 9 to rotate inside the housing 3, and the rotating threaded tube 9 acts on the outer side of the extension ring 8, so that the extension ring 8 moves downward, and then acts on the extrusion ring 7, so that the extrusion ring 7 is embedded in the V-shaped groove 6 of the sealing rubber ring 5, and the sealing rubber ring 5 is squeezed by the extrusion ring 7 so that the sealing rubber ring 5 expands outward on both sides, and then fits tightly with the valve stem body 2 and the mounting block 4 to improve the sealing performance. When the sealing rubber ring 5 fits tightly with the valve stem body 2, the sleeve 13 rotates, and the card groove 16 squeezes the card block 19 so that the card block 19 shrinks into the inside of the mounting groove 17, and then the card groove 16 passes over the card block 19, so that slippage occurs between the sleeve 13 and the connecting rod 12, and the extrusion ring 7 is prevented from being embedded too much in the V-shaped groove 6, causing excessive extrusion of the sealing rubber ring 5 and the valve stem body 2, and then preventing the sealing rubber ring 5 from being quickly worn.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A novel valve stem sealing structure, comprising a valve stem body (2), characterized in that: An outer shell (3) is provided on the outer side of the valve stem body (2), and the outer shell (3) is fixedly connected to the top end of the valve body (1); a mounting block (4) is fixedly connected to the inner bottom end of the outer shell (3); a sealing rubber ring (5) is installed on the inner side of the mounting block (4), and the sealing rubber ring (5) is sleeved on the outer side of the valve stem body (2); a V-shaped groove (6) is provided in the middle of the sealing rubber ring (5); an extrusion ring (7) is provided inside the V-shaped groove (6), and the cross section of the extrusion ring (7) is V-shaped; a pressing component is provided at the top end of the extrusion ring (7).

2. A new valve stem sealing structure according to claim 1, characterized in that: The pressing assembly comprises an extension ring (8), the outer side of the extension ring (8) is threadedly connected to a threaded pipe (9), and the threaded pipe (9) is rotatably connected to the inside of the housing (3).

3. A new valve stem sealing structure according to claim 2, characterized in that: The top end of the threaded tube (9) is fixedly connected to a toothed ring (10), the inner side of the toothed ring (10) is meshingly connected to a gear (11), the top end of the gear (11) is fixedly connected to a connecting rod (12), the top end of the connecting rod (12) is provided with a sleeve (13), and the sleeve (13) penetrates to the outside of the outer shell (3).

4. A new valve stem sealing structure according to claim 3, characterized in that: The top of the connecting rod (12) is evenly provided with a plurality of mounting grooves (17) along the circumferential surface, a spring (18) is fixedly connected inside the mounting groove (17), one end of the spring (18) is fixedly connected with a clamping block (19), and the inside of the sleeve (13) is evenly provided with clamping grooves (16) along the circumferential surface, and the clamping grooves (16) cooperate with the clamping block (19).

5. A new valve stem sealing structure according to claim 3, characterized in that: The top end of the connecting rod (12) is fixedly connected with a connecting block (15), and the connecting block (15) is rotatably connected to the inside of the sleeve (13).

6. A new valve stem sealing structure according to claim 3, characterized in that: A protrusion (14) is fixedly connected to the top end of the sleeve (13), and the protrusion (14) is a regular hexagon.

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