CN213451815U

CN213451815U - Anti-leakage double-ball valve

Info

Publication number: CN213451815U
Application number: CN202022440551.3U
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: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-06-15
Anticipated expiration: 2030-10-28

Abstract

The utility model discloses a prevent two ball valve of leakage uses in the valve field, and its technical scheme main points are: comprises a valve body, a valve cavity arranged on the valve body and a flow velocity control assembly arranged on the valve body; the flow rate control assemblies are arranged in two groups along the length direction of the valve body and comprise a valve ball, a valve rod connected with the valve ball and a handle connected with the rod, the valve body is provided with an installation through hole communicated with the valve cavity, and the valve rod penetrates through the installation through hole; the two sides of the valve ball along the length direction of the valve body are both provided with valve seat assemblies, and the two ends of the valve body are both provided with valve cover assemblies for limiting the positions of the valve ball and the valve seat assemblies; a supporting plate is arranged in the middle of the valve cavity, a through hole communicated with the valve cavity is formed in the supporting plate, positioning grooves are formed in two sides of the supporting plate, and the valve seat assembly close to the middle of the valve body is arranged in the positioning grooves; the sealing device has the technical effect that the sealing performance can be kept better on pipelines for transporting high-pressure or even ultrahigh-pressure fluid.

Description

Anti-leakage double-ball valve

Technical Field

The utility model relates to a fluid control equipment field, in particular to prevent double ball valve of leakage.

Background

At present, chinese patent publication No. CN107387797B discloses a ball valve, which includes: a valve body having an inner cavity; the valve seat is arranged in the inner cavity, and an accommodating space is formed between one end of the valve seat and the valve body; the spring is arranged in the accommodating space and is arranged between the valve body and the valve seat in an abutting mode; the ball valve still includes: the isolating cylinder is connected between the valve body and the valve seat and divides the accommodating space into a spring accommodating space and an overflowing space which are mutually independent, and the spring is accommodated in the spring accommodating space; the ball body is provided with a valve port communicated with the ball body, the end face of the valve seat contacted with the spring is provided with an annular boss, one end of the isolating cylinder is connected in the inner wall of the valve port, and the other end of the isolating cylinder is connected on the annular boss.

Although the conventional ball valve can be used for controlling the delivery of fluid, when the fluid with high pressure or ultrahigh pressure is controlled, the sealing structure of the conventional ball valve is usually failed, and the conventional ball valve cannot play a good sealing role.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a prevent two ball valve of leakage, its advantage can keep better sealing performance on the pipeline of transportation high pressure superhigh pressure fluid even.

The above technical purpose of the present invention can be achieved by the following technical solutions: a leakproof double-ball valve comprises a valve body, a valve cavity arranged on the valve body and a flow rate control assembly arranged on the valve body; the flow rate control assemblies are arranged in two groups along the length direction of the valve body, each flow rate control assembly comprises a valve ball, a valve rod connected with the valve ball and a handle connected with the corresponding rod, an installation through hole communicated with the valve cavity is formed in the valve body, and the valve rods penetrate through the installation through holes;

the two sides of the valve ball along the length direction of the valve body are both provided with valve seat assemblies, and the two ends of the valve body are both provided with valve seat assemblies for limiting the positions of the valve ball and the valve seat assemblies;

the valve seat component is characterized in that a supporting plate is arranged at the middle position of the valve cavity, a through hole communicated with the valve cavity is formed in the supporting plate, positioning grooves are formed in two sides of the supporting plate, and the valve seat component close to the middle position of the valve body is arranged in the positioning grooves.

Through the technical scheme, the flow rate control assemblies are used for controlling the flow rate of fluid in the valve cavity, and the two groups of flow rate control assemblies can better share the pressure caused by high-pressure fluid, so that the leakage condition caused by overlarge fluid pressure is better avoided; the valve seat assembly is used for sealing up a gap between the valve ball and the valve body, so that leakage of fluid is avoided well, the valve seat assembly and the valve ball are limited in the valve cavity by the valve cover assembly, the valve seat assembly and the valve ball can play a role more stably, and the fluid is further ensured not to be leaked.

The utility model discloses further set up to: the valve seat assembly comprises a sealed valve seat made of elastic materials, a sealed arc surface and a deformation yielding groove, the sealed arc surface is arranged on the side, facing the valve ball, of the sealed valve seat, the sealed arc surface is attached to the outer side surface of the valve ball, and the deformation yielding groove is arranged on the side, far away from the valve ball, of the sealed valve seat.

Through the technical scheme, the sealing cambered surface is attached to the outer side wall of the valve ball, so that a good sealing effect can be achieved; when the valve cover component limits the valve seat component and the valve ball in the valve cavity, the sealing valve seat is made of elastic materials, so that the sealing valve seat can generate elastic deformation, the sealing cambered surface can be attached to the valve ball more tightly, and a better sealing effect is achieved; the deformation abdicating groove is used for having a certain buffer space when the sealing valve seat deforms, so that the elasticity of the sealing valve seat is better.

The utility model discloses further set up to: the valve cover assembly comprises a compression sleeve and an outer hexagon nut, the compression sleeve and the outer hexagon nut are integrally formed, and the compression sleeve is in threaded fit with the inner wall of the valve cavity.

Through above-mentioned technical scheme, outer hexagon nut makes the installation and dismantles compressing sleeve convenient and fast more, and compressing sleeve and outer hexagon nut integrated into one piece form for valve gap subassembly overall structure intensity is better, thereby can be better bear high-pressure fluid's pressure.

The utility model discloses further set up to: one side of the pressing sleeve facing the valve ball is provided with a containing groove, and the valve seat assembly far away from the middle position of the valve body is arranged in the containing groove.

Through above-mentioned technical scheme, the holding tank is used for holding the disk seat subassembly for the disk seat subassembly installation is more stable, when bearing high pressure or even the pressure of superhigh pressure fluid, the disk seat subassembly also can remain stable sealed effect, and better avoiding the fluid to reveal.

The utility model discloses further set up to: the outer side wall of the compression sleeve is provided with a cover body sealing groove, an annular cover body sealing ring is arranged in the cover body sealing groove, and the cover body sealing ring is abutted against the inner wall of the cover body sealing groove and the inner wall of the valve cavity.

Through above-mentioned technical scheme, the lid seal groove is used for holding the lid sealing washer, and the lid sealing washer is used for plugging up the clearance that compresses tightly between sleeve and the valve pocket inner wall to better avoid the fluid to take place to reveal.

The utility model discloses further set up to: one end of the valve rod, which is close to the valve ball, is provided with a limiting shaft shoulder, the valve body is arranged in the mounting through hole and is provided with a limiting ring, and the outer diameter of the limiting shaft shoulder is larger than the inner diameter of the limiting ring.

Through above-mentioned technical scheme, the cooperation of spacing ring and spacing shaft shoulder for the position of restriction valve rod that the spacing ring can be better, thereby avoid the valve rod to drop from the direction of keeping away from the valve ball.

The utility model discloses further set up to: the outer side wall of the valve rod is provided with a containing ring groove, and a graphite ring is arranged in the containing ring groove.

Through above-mentioned technical scheme, hold the annular and be used for holding the graphite ring, graphite can play better lubricated effect to reduce the frictional force of valve rod and installation through-hole lateral wall, the valve rod can stabilize smooth and easy rotation more, and then the velocity of flow of the fluid in the control valve chamber that can be better.

The utility model discloses further set up to: one side of the valve body facing the handle is provided with a limit pin, the handle is provided with a limit stop, and the handle is abutted against the limit stop and the limit pin when rotating to a certain angle.

Through above-mentioned technical scheme, limit stop and limit pin's cooperation, restriction handle pivoted position that can be better to can be better avoid the mistake to touch the handle and close the valve mistake or open by mistake.

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

1. the valve seat assembly blocks a gap between the valve ball and the valve body, so that the overall sealing performance of the ball valve is better ensured, and the two groups of flow rate control assemblies can better share the pressure of fluid in the valve body, so that the leakage condition caused by overlarge pressure is avoided;

2. the valve cover assembly stably limits the valve ball and the valve seat assembly in the valve cavity, so that the stability of the valve ball and the valve seat assembly is well guaranteed.

Drawings

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

FIG. 2 is a plan view of the overall structure of the present embodiment;

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

FIG. 4 is an enlarged schematic view of portion B of FIG. 1;

fig. 5 is an enlarged schematic view of part C of fig. 1.

Reference numerals: 1. a valve body; 2. a valve cavity; 3. a flow rate control assembly; 4. a valve ball; 5. a valve stem; 6. a handle; 8. a valve seat assembly; 9. a valve cover assembly; 10. a support plate; 11. positioning a groove; 12. sealing the valve seat; 13. sealing the arc surface; 14. a deformation abdicating groove; 15. compressing the sleeve; 16. an outer hexagonal nut; 17. accommodating grooves; 18. a cover body sealing groove; 19. a cover body sealing ring; 20. a limiting shaft shoulder; 21. a limiting ring; 22. a graphite ring; 23. a limit pin; 24. and a limit stop.

Detailed Description

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

Example (b):

referring to fig. 1, a leakage-proof double-ball valve comprises a valve body 1, a valve cavity 2 and a flow rate control assembly 3 arranged on the valve body 1, wherein the valve body 1 is integrally cylindrical, the valve cavity 2 is arranged along the length direction of the valve body 1, and the valve cavity 2 penetrates through the valve body 1; the flow velocity control assembly 3 is used for conveying efficiency of fluid in the valve cavity 2, and the two sets of flow velocity control assemblies 3 can better share pressure of the fluid, so that leakage of the fluid is better avoided.

Referring to fig. 1, the flow rate control assembly 3 includes a valve ball 4, a valve rod 5 and a handle 6, a through hole communicated with the valve cavity 2 is provided on the valve ball 4, two sets of flow rate control assemblies 3 are provided along the length direction of the valve body 1, and the two sets of flow rate control assemblies 3 are symmetrically arranged. The mounting through hole communicated with the valve cavity 2 is formed in the valve body 1, the valve rod 5 penetrates through the mounting through hole, the valve rod 5 is connected with the valve ball 4, the key groove is formed in the valve ball 4, and the square key is formed in one end, facing the key groove, of the valve rod 5 in an integrated mode and inserted into the key groove. The handle 6 is bolted to the valve stem 5 and by grasping the handle 6, the valve stem 5 and hence the valve ball 4 can be conveniently rotated to adjust the rate of fluid flow within the valve chamber 2.

Referring to fig. 1 and 2, a limit pin 23 is arranged on one side of the valve body 1 facing the handle 6, and one half of the limit pin 23 is inserted into the valve body 1, and the other half of the limit pin extends out of the valve body 1; one side of the handle 6, which faces the valve body 1, is welded with two limit stops 24, and the included angle between the two limit stops 24 is 90 degrees; when the handle 6 rotates, the limit pin 23 and the limit stop 24 are matched, so that the rotation angle of the handle 6 can be limited to 90 degrees, and the condition of mistaken opening or mistaken closing caused by mistaken collision can be better avoided.

Referring to fig. 1 and 3, the one end integrated into one piece that valve rod 5 is close to valve ball 4 has spacing shaft shoulder 20, and the inner wall that 4 one end of valve ball was kept away from to the mounting through-hole is provided with spacing ring 21, and spacing ring 21 forms with valve body 1 integrated into one piece, and the external diameter of spacing shaft shoulder 20 is greater than the internal diameter of spacing ring 21 to make valve rod 5 install back in the mounting through-hole, valve rod 5 can not fall from the direction of keeping away from valve ball 4, has guaranteed the stability of valve rod 5 when using. Seted up on the 5 lateral walls of valve rod and held the annular, held and be provided with graphite ring 22 in the annular, graphite ring 22 sets up with the inner wall laminating of mounting hole, because graphite ring 22 has better self-lubricating performance to better reduction the frictional force of 5 mounting hole inner walls of valve rod, make the rotation that valve rod 5 can be more convenient.

Referring to fig. 4, valve seat assemblies 8 are arranged on both sides of the valve ball 4 along the length direction of the valve body 1, each valve seat assembly 8 comprises a sealing valve seat 12 made of an elastic material, a sealing arc surface 13 and a deformation abdicating groove 14, the sealing arc surface 13 is arranged on the side surface of the sealing valve seat 12 facing the valve ball 4, and the sealing arc surface 13 is attached to the outer side surface of the valve ball 4; deformation tank 14 of stepping down sets up in the one side that sealed disk seat 12 kept away from valve ball 4, and when sealed disk seat 12 received the extrusion, sealed disk seat 12 can take place deformation, and deformation tank 14 of stepping down can play better cushioning effect of stepping down to sealed disk seat 12 can play better cushioning effect.

Referring to fig. 1 and 4, the centre of valve pocket 2 is provided with backup pad 10, and backup pad 10 forms with valve body 1 integrated into one piece, sets up the through-hole with valve pocket 2 intercommunication in the backup pad 10, and constant head tank 11 has all been seted up to the both sides of backup pad 10, and the disk seat subassembly 8 that is close to the valve body 1 intermediate position sets up in constant head tank 11, and the position of restriction disk seat subassembly 8 that constant head tank 11 can be better to make disk seat subassembly 8 place more stable.

Referring to fig. 1, both ends of a valve body 1 are provided with a valve cover assembly 9, and the valve cover assemblies 9 are used for limiting a valve seat assembly 8 and a valve ball 4 in a valve cavity 2, so that the valve ball 4 and a valve seat can be more stable, and the sealing performance of the ball valve is better ensured; the valve cover assembly 9 comprises a pressing sleeve 15 and an outer hexagon nut 16, the pressing sleeve 15 and the outer hexagon nut 16 are integrally formed, an external thread is arranged on the outer side of the pressing sleeve 15, an internal thread matched with the external thread is arranged on the inner wall of the valve cavity 2, and the outer hexagon nut 16 enables an adopted tool which can be convenient to screw the pressing sleeve 15 into the valve cavity 2.

Referring to fig. 1 and 5, one side of the compression sleeve 15 facing the valve ball 4 is provided with an accommodating groove 17, the valve seat assemblies 8 close to the two ends of the valve body 1 are arranged in the accommodating groove 17, and the accommodating groove 17 can better limit the positions of the valve seat assemblies 8, so that the valve seat assemblies 8 and the valve ball 4 can better play a role in sealing; the outer side wall of the pressing sleeve 15 is provided with a cover body sealing groove 18, an annular cover body sealing ring 19 is arranged in the cover body sealing groove 18, and the cover body sealing ring 19 is abutted against the inner wall of the cover body sealing groove 18 and the inner wall of the valve cavity 2, so that the cover body sealing ring 19 can better seal up the gap between the valve body 1 and the pressing sleeve 15, and the sealing performance is better improved.

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. A leakproof double-ball valve comprises a valve body (1), a valve cavity (2) arranged on the valve body (1) and a flow velocity control assembly (3) arranged on the valve body (1);

the flow velocity control device is characterized in that two groups of flow velocity control assemblies (3) are arranged along the length direction of a valve body (1), each flow velocity control assembly (3) comprises a valve ball (4), a valve rod (5) connected with the valve ball (4) and a handle (6) connected with the corresponding rod, an installation through hole communicated with a valve cavity (2) is formed in the valve body (1), and the valve rod (5) penetrates through the installation through hole;

valve seat assemblies (8) are arranged on two sides of the valve ball (4) along the length direction of the valve body (1), and valve cover assemblies (9) for limiting the positions of the valve ball (4) and the valve seat assemblies (8) are arranged on two ends of the valve body (1);

the valve seat assembly is characterized in that a supporting plate (10) is arranged at the middle position of the valve cavity (2), a through hole communicated with the valve cavity (2) is formed in the supporting plate (10), positioning grooves (11) are formed in two sides of the supporting plate (10), and the valve seat assembly (8) close to the middle position of the valve body (1) is arranged in the positioning grooves (11).

2. A leak-proof double-ball valve according to claim 1, wherein the valve seat assembly (8) comprises a sealing valve seat (12) made of elastic material, a sealing arc surface (13) and a deformation abdicating groove (14), the sealing arc surface (13) is arranged on the side of the sealing valve seat (12) facing the valve ball (4), the sealing arc surface (13) is attached to the outer side of the valve ball (4), and the deformation abdicating groove (14) is arranged on the side of the sealing valve seat (12) far away from the valve ball (4).

3. A leak resistant double ball valve according to claim 2, wherein the bonnet assembly (9) comprises a compression sleeve (15) and an outer hexagonal nut (16), the compression sleeve (15) and the outer hexagonal nut (16) being integrally formed, the compression sleeve (15) being in threaded engagement with the inner wall of the valve chamber (2).

4. A leak-proof double-ball valve according to claim 3, characterized in that the compression sleeve (15) has a receiving groove (17) provided on the side facing the valve ball (4), the seat assembly (8) remote from the middle of the valve body (1) being disposed in the receiving groove (17).

5. A leak-proof double-ball valve according to claim 3, wherein the outer side wall of the compression sleeve (15) is provided with a cover body sealing groove (18), an annular cover body sealing ring (19) is arranged in the cover body sealing groove (18), and the cover body sealing ring (19) abuts against the inner wall of the cover body sealing groove (18) and the inner wall of the valve cavity (2).

6. A leak-proof double-ball valve according to claim 1, characterized in that the end of the valve stem (5) close to the valve ball (4) is provided with a limiting shoulder (20), the valve body (1) in the mounting through hole is provided with a limiting ring (21), and the outer diameter of the limiting shoulder (20) is larger than the inner diameter of the limiting ring (21).

7. A leak-proof double-ball valve according to claim 1, characterized in that the outer side wall of the valve stem (5) is provided with a receiving ring groove, and a graphite ring (22) is arranged in the receiving ring groove.

8. A leak-proof double-ball valve according to claim 1, characterized in that the side of the valve body (1) facing the handle (6) is provided with a limit pin (23), and the handle (6) is provided with a limit stop (24).