CN213017844U

CN213017844U - Ball valve with high sealing performance

Info

Publication number: CN213017844U
Application number: CN202021992906.3U
Authority: CN
Inventors: 吴磊; 张绍南
Original assignee: Suzhou Tesco Fluid Control Equipment Co ltd
Current assignee: Suzhou Tesco Fluid Control Equipment Co ltd
Priority date: 2020-09-12
Filing date: 2020-09-12
Publication date: 2021-04-20
Anticipated expiration: 2030-09-12

Abstract

The utility model discloses a ball valve of high leakproofness uses in the valve field, and its technical scheme main points are: the valve comprises a valve body, a valve seat assembly arranged in the valve body and a valve ball rotatably arranged in the valve body, wherein the valve ball is connected with a valve rod; the valve seat assembly comprises an annular valve seat, a sealing cambered surface and a valve core sealing ring embedded in the annular valve seat, the sealing cambered surface is attached to the valve ball, and the valve core sealing ring is abutted to the surface of the valve ball; a sealing component for plugging a gap between the valve cover and the annular valve seat is arranged between the valve cover and the annular valve seat; the sealing device has the technical effects of high sealing performance and capability of preventing liquid leakage.

Description

Ball valve with high sealing performance

Technical Field

The utility model relates to a valve field, in particular to ball valve of high leakproofness.

Background

At present, the utility model discloses a chinese utility model patent that bulletin number is CN202381737U, a fire prevention ball valve is published, which comprises a valve body, a valve seat, the valve rod, spheroid and handle, the valve body on be equipped with inflow channel and outflow passageway, be equipped with the valve pocket between inflow channel and the outflow passageway, the valve pocket is close to inflow channel one end and all is equipped with the disk seat near outflow passageway one end, be equipped with the spheroid between the disk seat, the valve body on be equipped with the valve rod hole, valve rod hole bottom is equipped with sealed the pad, the valve rod passes the valve rod hole, valve rod one end is pegged graft with the spheroid and is constituted circumferential direction and be connected: the valve seat adopts carbon fiber, a sealing surface sealed with the ball body is arranged on the valve seat to form soft sealing, a curved surface is arranged between the inflow channel and the outflow channel and the valve cavity, the curved surface and the ball body are matched to form sealing to form hard sealing, and the ball valve is provided with an antistatic device of a conductive body.

Although the conventional ball valve can control the flow rate of the fluid, the sealing effect is not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a ball valve of high leakproofness, its advantage has higher sealing performance, the seepage that prevents liquid that can be better.

The above technical purpose of the present invention can be achieved by the following technical solutions: a ball valve with high sealing performance comprises a valve body, a valve seat assembly arranged in the valve body and a valve ball rotatably arranged in the valve body, wherein a valve rod is connected to the valve ball;

the valve seat assembly comprises an annular valve seat, a sealing cambered surface and a valve core sealing ring embedded in the annular valve seat, the sealing cambered surface is attached to the valve ball, and the valve core sealing ring is abutted to the surface of the valve ball;

and a sealing assembly for plugging a gap between the valve cover and the annular valve seat is arranged between the valve cover and the annular valve seat.

Through the technical scheme, the valve rod is used for driving the valve ball to rotate, so that the flow rate of fluid can be conveniently adjusted, and the valve cover is connected with the pipeline, so that the valve body is communicated with the pipeline, and the fluid can conveniently circulate; the sealing cambered surface on the annular valve seat is used for being attached to the valve ball, so that the sealing performance is better improved, and the sealing effect of the valve core sealing ring is further improved; the sealing assembly is used for sealing a gap between the valve cover and the annular valve seat, so that liquid is better prevented from leaking between the valve cover and the annular valve seat, and the overall sealing performance of the valve is further improved.

The utility model discloses further set up to: the sealing assembly comprises a sealing ring and a valve cover sealing ring which are arranged on the valve cover, the sealing ring is arranged at one end of the valve cover facing the valve ball, the sealing ring is inserted between the annular valve seat and the valve body, a first accommodating groove is formed in the outer circumferential surface of the annular valve seat, and the valve cover sealing ring is arranged in the first accommodating groove.

Through the technical scheme, the sealing ring can be inserted between the annular valve seat and the valve body, and the first accommodating groove is used for accommodating the valve cover sealing ring, so that the valve cover sealing ring is more stably arranged; and simultaneously the valve gap sealing washer laminates with the inner wall of valve body, better with the clearance shutoff between valve body and the valve gap, further improvement sealed effect.

The utility model discloses further set up to: the outer periphery of sealing ring has seted up the second holding tank, the cover is equipped with the valve body sealing washer with valve body inner wall butt in the second holding tank.

Through above-mentioned technical scheme, the second holding tank is used for holding the valve body sealing washer, and the valve body sealing washer is used for plugging up the clearance between valve body and the sealing ring to further and improved the holistic sealed effect of valve.

The utility model discloses further set up to: the valve comprises a valve body and is characterized in that the end face of the valve body is provided with an annular end face positioning groove, and the valve cover is provided with an end face positioning ring inserted into the end face positioning groove.

Through above-mentioned technical scheme, the terminal surface constant head tank is used for cooperating with the terminal surface holding ring to make the valve gap can be more accurate with the valve body cooperation, the better improvement assembly efficiency, make the valve gap can be more accurate communicate with the valve body moreover, make the circulation that the fluid can be better.

The utility model discloses further set up to: the valve comprises a valve body and is characterized in that a gland is detachably connected to the valve body, a shaft penetrating through hole for a valve rod to pass through is formed in the gland, an extension ring inserted into the valve body is extended towards one end of the valve body by the gland, a cover body sealing groove is formed in the outer side wall of the extension ring, and a cover body sealing ring abutted against the wall of the valve body hole is arranged in the cover body sealing groove.

Through the technical scheme, the shaft penetrating through hole is used for the valve rod to penetrate through, and the extension ring is inserted into the valve body, so that the gland can be connected with the valve body more stably; the cover body sealing groove is used for accommodating the cover body sealing ring, so that the cover body sealing ring is placed more stably, the cover body sealing ring is used for sealing a gap between the gland and the valve body, and the sealing effect is further improved.

The utility model discloses further set up to: the gland inner wall is provided with annular body of rod seal groove, be provided with the body of rod sealing washer with the laminating of valve rod outer wall in the body of rod seal groove.

Through the technical scheme, the rod body sealing groove is used for placing the rod body sealing ring, so that the rod body sealing ring can be placed more stably, the rod body sealing ring can better seal up a gap between the rod body and the gland, fluid leakage from the rod body is better avoided, and the sealing effect is further improved.

The utility model discloses further set up to: the gland inner wall is provided with a lubricating groove for containing lubricating oil, the gland is provided with an oil filling hole communicated with the lubricating groove, and the gland is provided with a sealing cover for plugging the oil filling hole.

Through above-mentioned technical scheme, the lubrication groove is used for saving lubricating oil for the rotation that the valve rod can be more stable, the oil filler point later stage of being convenient for adds lubricating oil in to the lubrication groove, and sealed lid is arranged in sealing the oil filler point, avoids lubricating oil leakage or outside dirty pollution lubricating oil.

The utility model discloses further set up to: the valve gap is towards the direction wall thickness that keeps away from the valve body and increases gradually, the one end that the valve body was kept away from to the valve gap is provided with flange, be provided with the flange seal groove that is used for holding the sealing washer on flange's the terminal surface.

Through above-mentioned technical scheme, flange is used for being connected with the pipeline for the valve can be stable with the pipeline intercommunication, the flange seal groove is used for placing the sealing washer, so that block up flange and pipeline connection's clearance, thereby the better clearance of avoiding fluid to follow between flange and the pipeline leaks.

To sum up, the utility model discloses following beneficial effect has:

1. the sealing assembly is used for sealing a gap between the valve cover and the valve seat, so that fluid is better prevented from leaking from the valve cover, and the overall sealing performance of the ball valve is improved;

2. the cover body sealing ring and the rod body sealing ring are used for sealing gaps among the valve rod, the gland and the valve body, and the overall sealing performance of the ball valve is further improved.

Drawings

FIG. 1 is a sectional view of the overall structure of the present embodiment;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is an enlarged schematic view of portion B of FIG. 1;

fig. 4 is a schematic structural view of the gland of the present embodiment.

Reference numerals: 1. a valve body; 2. a valve seat assembly; 3. a valve ball; 4. a valve stem; 5. a valve cover; 6. an annular valve seat; 7. sealing the arc surface; 8. a valve core sealing ring; 9. a seal assembly; 10. a seal ring; 11. a valve cover sealing ring; 12. a first accommodating groove; 13. a second accommodating groove; 14. a valve body sealing ring; 15. an end face positioning groove; 16. an end face positioning ring; 17. a gland; 18. a shaft through hole; 19. an extension ring; 20. a cover body sealing groove; 21. a cover body sealing ring; 22. a rod body sealing groove; 23. a rod body sealing ring; 24. a lubrication groove; 25. an oil filler hole; 26. a sealing cover; 27. a connecting flange; 28. the flange seals the groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

referring to fig. 1 and 2, a high-sealability ball valve comprises a valve body 1, a valve seat assembly 2, a valve ball 3 and a valve stem 4; the valve seat assembly 2 comprises two annular valve seats 6, a sealing cambered surface 7 and a valve core sealing ring 8 which are symmetrically arranged, a channel for fluid circulation is arranged in the valve body 1, the annular valve seats 6 are arranged in the channel and close to the positions of two ends of the valve body 1, the valve ball 3 is arranged between the two annular valve seats 6, the sealing cambered surface 7 is arranged on one side opposite to the two annular valve seats 6, the sealing cambered surface 7 is attached to the surface of the valve ball 3, and the sealing effect between the valve ball 3 and the annular valve seats 6 is better improved; annular holding tank has been seted up on annular disk seat 6, and case sealing washer 8 inlays to be established and hold from here, and case sealing washer 8 cooperates with 6 butt of annular disk seat.

Referring to fig. 2, a sealing assembly 9 is arranged between the valve cover 5 and the annular valve seat 6, and the sealing assembly 9 seals up a gap between the valve cover 5 and the annular valve seat 6; the sealing assembly 9 comprises a sealing ring 10 and a valve cover sealing ring 11, the sealing ring 10 and the valve cover 5 are integrally formed and processed, and the sealing ring 10 is inserted between the annular valve seat 6 and the valve body 1; the annular valve seat 6 is provided with a first accommodating groove 12 on the outer circumferential surface close to one end of the valve cover 5, the valve cover sealing ring 11 is placed in the first accommodating groove 12, and the valve cover sealing ring 11 is abutted to the inner wall of the sealing ring 10, so that the sealing performance between the valve cover 5 and the annular valve seat 6 is better improved. First holding tank 12 and valve gap sealing washer 11 can be provided with two sets ofly along the axis direction of annular valve seat 6, improvement sealing performance that can step forward.

Referring to fig. 2, a second receiving groove 13 is formed in the outer circumferential surface of the sealing ring 10, a valve body sealing ring 14 is sleeved in the second receiving groove 13, and the valve body sealing ring 14 abuts against the inner wall of the valve body 1 so as to ensure the sealing performance between the valve cover 5 and the valve body 1; annular terminal surface constant head tank 15 has been seted up towards the terminal surface of valve gap 5 to valve body 1, and valve gap 5 has terminal surface holding ring 16 towards the one end integrated into one piece of valve body 1, and terminal surface holding ring 16 can insert and establish into terminal surface constant head tank 15 to the lateral wall of terminal surface holding ring 16 and the lateral wall laminating of terminal surface constant head tank 15.

Referring to fig. 1, the wall thickness of the valve cover 5 gradually increases towards the direction away from the valve body 1, a connecting flange 27 is integrally formed at one end of the valve cover 5 away from the valve body 1, a flange sealing groove 28 is formed in the end face of the connecting flange 27, and the flange sealing groove 28 is used for accommodating a sealing ring, so that when a pipeline is installed, a gap between the pipeline and a mounting flange is sealed, and the sealing effect is further improved.

Referring to fig. 1 and 3, a gland 17 is connected to the valve body 1 through a bolt, the gland 17 is integrally cylindrical, a shaft through hole 18 is formed in the middle of the gland 17 along the axial direction, and the shaft through hole 18 is used for allowing the valve rod 4 to pass through; an extension ring 19 inserted into the valve body 1 is extended from one end of the gland 17 facing the valve body 1, a cover body sealing groove 20 is formed in the outer side wall of the extension ring 19, a cover body sealing ring 21 is arranged in the cover body sealing groove 20, and the cover body sealing ring 21 is attached to the inner wall of the valve body 1 so as to seal a gap between the gland 17 and the valve body 1.

Referring to fig. 3 and 4, an annular rod body sealing groove 22 is formed in the inner wall of the gland 17, two rod body sealing grooves 22 are formed in the axial direction of the gland 17, a rod body sealing ring 23 is arranged in the rod body sealing groove 22, and the rod body sealing ring 23 is abutted against the outer wall of the valve rod 4, so that fluid can be better prevented from leaking from the valve rod 4; lubricating groove 24 has been seted up to gland 17 inner wall, and lubricating groove 24 is used for holding lubricating oil, and lubricating groove 24 sets up between two body of rod seal grooves 22 to make body of rod sealing washer 23 can be better prevent that lubricating oil from leaking, make lubricating valve rod 4 and gland 17 that lubricating oil can be better, make the rotation that valve rod 4 can be stable. An oil filling hole 25 communicated with the lubricating groove 24 is formed in the gland 17 so as to inject lubricating oil into the lubricating groove 24; the gland 17 is provided with a sealing cover 26 in threaded fit at the oil filling hole 25, and the sealing cover 26 is used for sealing the oil filling hole 25, so that the lubricating oil is better prevented from being leaked and polluted by external dirt.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The ball valve with high sealing performance is characterized by comprising a valve body (1), a valve seat assembly (2) arranged in the valve body (1) and a valve ball (3) rotatably arranged in the valve body (1), wherein a valve rod (4) is connected to the valve ball (3);

the valve seat assembly (2) comprises an annular valve seat (6), a sealing cambered surface (7) and a valve core sealing ring (8) embedded in the annular valve seat (6), the sealing cambered surface (7) is attached to the valve ball (3), and the valve core sealing ring (8) is abutted to the surface of the valve ball (3);

and a sealing assembly (9) for plugging a gap between the valve cover (5) and the annular valve seat (6) is arranged between the valve cover and the annular valve seat.

2. A high-sealing ball valve according to claim 1, wherein the sealing assembly (9) comprises a sealing ring (10) and a bonnet sealing ring (11) which are arranged on the bonnet (5), the sealing ring (10) is arranged at one end of the bonnet (5) facing the valve ball (3), the sealing ring (10) is inserted between the annular valve seat (6) and the valve body (1), a first accommodating groove (12) is formed on the outer circumferential surface of the annular valve seat (6), and the bonnet sealing ring (11) is arranged in the first accommodating groove (12).

3. The ball valve with high sealing performance according to claim 2, wherein a second accommodating groove (13) is formed on the outer circumferential surface of the sealing ring (10), and a valve body sealing ring (14) abutting against the inner wall of the valve body (1) is sleeved in the second accommodating groove (13).

4. A high-sealing ball valve according to claim 1, wherein an annular end face positioning groove (15) is formed in the end face of the valve body (1), and an end face positioning ring (16) inserted into the end face positioning groove (15) is arranged on the valve cover (5).

5. The ball valve with high sealing performance according to claim 1, wherein a gland (17) is detachably connected to the valve body (1), a shaft penetrating through hole (18) for the valve rod (4) to pass through is formed in the gland (17), an extending ring (19) inserted into the valve body (1) is extended from one end of the gland (17) facing the valve body (1), a cover body sealing groove (20) is formed in the outer side wall of the extending ring (19), and a cover body sealing ring (21) abutted against the wall of the valve body (1) is arranged in the cover body sealing groove (20).

6. A high-tightness ball valve according to claim 5, characterized in that an annular rod body sealing groove (22) is arranged on the inner wall of the gland (17), and a rod body sealing ring (23) attached to the outer wall of the valve rod (4) is arranged in the rod body sealing groove (22).

7. The ball valve with high sealing performance according to claim 5, characterized in that a lubricating groove (24) for containing lubricating oil is formed in the inner wall of the gland (17), an oil filling hole (25) communicated with the lubricating groove (24) is formed in the gland (17), and a sealing cover (26) for sealing the oil filling hole (25) is arranged on the gland (17).

8. A high-sealing ball valve according to claim 1, wherein the wall thickness of the valve cover (5) gradually increases towards the direction away from the valve body (1), a connecting flange (27) is arranged at one end of the valve cover (5) away from the valve body (1), and a flange sealing groove (28) for accommodating a sealing ring is arranged on the end surface of the connecting flange (27).