CN210510490U

CN210510490U - Double-ball one-way metal sealing ball valve

Info

Publication number: CN210510490U
Application number: CN201921072417.3U
Authority: CN
Inventors: 杨振瓯
Original assignee: Kunshan Dewiworkang Machinery Co Ltd
Current assignee: Kunshan Dewiworkang Machinery Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-05-12
Anticipated expiration: 2029-07-10

Abstract

The utility model discloses an one-way metal seal ball valve of two spheroids relates to sealed ball valve technical field, and is unfixed for the inner chamber capacity of solving current sealed ball valve, can not guarantee the high accuracy of flow, and sealed effect is poor, easily produces the problem that fluid medium revealed. The inside of valve body is provided with big ball valve, the inside of big ball valve is provided with little ball valve, the inside of little ball valve and big ball valve all is provided with the medium runner, the both sides of big ball valve inner wall all are provided with little disk seat, the both ends of big ball valve all are provided with big disk seat, the inside of big disk seat is provided with first ball bearing pad, the inside of first ball bearing pad is provided with first ball pad, the top of first ball bearing pad is provided with second ball bearing pad, one side of second ball bearing pad is provided with the second ball pad, the opposite side of second ball bearing pad is provided with the blind hole, the top of big ball valve is provided with the valve rod, be provided with the packing ring on the outer wall of valve rod.

Description

Double-ball one-way metal sealing ball valve

Technical Field

The utility model relates to a sealed ball valve technical field specifically is a one-way metal seal ball valve of two spheroids.

Background

Ball valves are a common flow valve. The structure of the ball valve generally comprises a valve body, a valve cover, a ball body, a valve rod and an operating mechanism, wherein the operating mechanism is in linkage fit with the valve rod and drives the valve rod to drive the ball body to rotate so as to complete the opening and closing actions of the ball valve. The ball valve has the outstanding advantages of small fluid resistance, good sealing performance, high reliability, high opening and closing speed and the like, so that the ball valve is widely applied to general industrial pipelines, and is also commonly used in the aspects of realizing agricultural modernization, the transportation industry, the national defense industry, improving the living standard of people and the like. Ball valves can be classified into a fixed ball valve and a floating ball valve in terms of structural principle. The fixed ball valve, i.e. the ball body is supported by the upper and lower support shafts to rotate fixedly, the sealing performance of the ball valve without leakage and the lower opening and closing torque are always the targets pursued by ball valve designers. At present, the design methods of the sealing structure of the ball valve are multiple, the sealing performance is enhanced by injecting sealing grease in some methods, and the sealing performance is improved by innovatively designing the structures of the valve seat and the valve body in some methods.

However, the capacity of the inner cavity of the existing sealing ball valve is not fixed, the high precision of the flow cannot be ensured, the sealing effect is poor, and the leakage of a fluid medium is easy to generate; therefore, the existing requirements are not met, and a double-ball one-way metal sealing ball valve is provided for the ball valve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an one-way metal seal ball valve of two spheroids to the inner chamber capacity of the current sealed ball valve that proposes in solving above-mentioned background art is unfixed, can not guarantee the high accuracy of flow, and sealed effect is poor, easily produces the problem that fluid medium revealed.

In order to achieve the above object, the utility model provides a following technical scheme: a double-ball one-way metal sealing ball valve comprises a valve body, wherein a large ball valve is arranged inside the valve body, a small ball valve is arranged inside the large ball valve, medium flow channels are arranged inside the small ball valve and the large ball valve, small valve seats are arranged on two sides of the inner wall of the large ball valve, large valve seats are arranged at two ends of the large ball valve, a first ball cushion seat is arranged inside the large valve seat, a first ball cushion is arranged inside the first ball cushion seat, a second ball cushion seat is arranged above the first ball cushion seat, a second ball cushion is arranged on one side of the second ball cushion seat, a blind hole is formed in the other side of the second ball cushion seat, a valve rod is arranged above the large ball valve, a gasket is arranged on the outer wall of the valve rod, a packing layer is arranged above the gasket, a packing ring is arranged above the packing ring, a packing gland is arranged above the packing ring, the packing gland is characterized in that a limiting ring is arranged above the packing gland, an anti-flying ring is arranged above the limiting ring, a medium outlet is formed in one side of the medium flow passage, and a medium inlet is formed in the other side of the medium flow passage.

Preferably, a mounting blind hole is formed below the large ball valve.

Preferably, a small pressing ring is arranged on one side of the small valve seat.

Preferably, a pre-tightening spring is arranged in the blind hole.

Preferably, the packing gland and the packing press ring are fixedly connected through screws.

Preferably, a mounting through hole is formed above the flying prevention ring.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a setting of big ball valve and little ball valve, in valve rod function in-process, fluid pressure pushes away little ball valve to the direction of export, the fluid is stored in big ball valve inner chamber, when big ball valve level rotated 180, the pressure promotes little ball valve and sees off the fluid before the valve, and store the fluid again, big ball valve is every to rotate 180 and is a duty cycle, valve flow is by valve cycle control, through threaded connection between little ball valve and the big ball valve, guarantee big ball valve inner chamber capacity fixed, thereby guarantee the high accuracy of flow, the periodic and intermittent type nature circulation of medium has been realized.

2. Through the setting of first ball pad and second ball pad, play the effect of double containment, first ball pad is close to the edge of big ball valve medium runner, plays the main seal effect, and the second ball pad is as the leakage protection seal structure of first ball pad, and fluid medium leaks when first ball pad is sealed, then carries out fluid medium leakage protection by the second ball pad and seals, and the pretension spring provides initial sealed pretightning force, has improved the sealed performance of ball valve.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the enlarged structure of the part A of the present invention;

FIG. 3 is a schematic view of the enlarged structure of the part B of the present invention;

in the figure: 1. a valve body; 2. mounting a through hole; 3. a valve stem; 4. an anti-flying ring; 5. a limiting ring; 6. a media inlet; 7. a media outlet; 8. a packing gland; 9. packing and pressing a ring; 10. a filler layer; 11. a gasket; 12. a medium flow passage; 13. a large ball valve; 14. a small ball valve; 15. installing blind holes; 16. a small valve seat; 17. a small pressing ring; 18. a large valve seat; 19. a first ball mount; 20. a first ball pad; 21. a second ball mat seat; 22. a second ball pad; 23. blind holes; 24. and pre-tightening the spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, the present invention provides an embodiment: a double-ball one-way metal sealing ball valve comprises a valve body 1, a large ball valve 13 is arranged inside the valve body 1, a small ball valve 14 is arranged inside the large ball valve 13, medium flow channels 12 are respectively arranged inside the small ball valve 14 and the large ball valve 13, small valve seats 16 are respectively arranged on two sides of the inner wall of the large ball valve 13, large valve seats 18 are respectively arranged at two ends of the large ball valve 13, a first ball cushion seat 19 is arranged inside the large valve seat 18, a first ball cushion 20 is arranged inside the first ball cushion seat 19, a second ball cushion seat 21 is arranged above the first ball cushion seat 19, a second ball cushion 22 is arranged on one side of the second ball cushion seat 21, a blind hole 23 is arranged on the other side of the second ball cushion seat 21, a valve rod 3 is arranged above the large ball valve 13, a gasket 11 is arranged on the outer wall of the valve rod 3, a packing layer 10 is arranged above the gasket 11, a packing 9 is arranged above the packing layer 10, a packing press ring, the limiting ring 5 is arranged above the packing gland 8, the anti-flying ring 4 is arranged above the limiting ring 5, the valve rod 3 can be prevented from flying out due to high internal pressure of the valve body 1, the medium outlet 7 is arranged on one side of the medium flow passage 12, and the medium inlet 6 is arranged on the other side of the medium flow passage 12.

Further, a mounting blind hole 15 is arranged below the large ball valve 13, and the mounting blind hole 15 is used for mounting the large ball valve 13.

Further, a small pressing ring 17 is provided at one side of the small valve seat 16, and the small pressing ring 17 plays a role of fixing the small valve seat 16.

Further, a pre-tightening spring 24 is arranged inside the blind hole 23, and the pre-tightening spring 24 provides initial sealing pre-tightening force.

Further, the packing gland 8 and the packing press ring 9 are fixedly connected through screws, so that the packing press ring 9 and the packing gland 8 are more firmly fixed.

Further, prevent flying to encircle 4 tops and be provided with installation through-hole 2, valve rod 3 passes installation through-hole 2 and big ball valve 13 fixed connection.

The working principle is as follows: when the double-sealing valve is used, the valve rod 3 is rotated, fluid medium enters from the medium inlet 6, in the operation process of the valve rod 3, the small ball valve 14 is pushed to the direction of the medium outlet 7 by fluid pressure, the fluid is stored in the inner cavity of the large ball valve 13, when the large ball valve 13 horizontally rotates for 180 degrees, the small ball valve 14 is pushed by the pressure before the valve to send the fluid out, and the fluid is stored again, the large ball valve 13 rotates for 180 degrees for one working cycle, the valve flow is controlled by the valve cycle, the fixed volume of the inner cavity of the large ball valve 13 is ensured through the threaded connection between the small ball valve 14 and the large ball valve 13, so that the high precision of the flow is ensured, the periodic and intermittent circulation of the medium is realized, the double-sealing effect is realized through the arrangement of the first ball gasket 20 and the second ball gasket 22, the first ball gasket 20 is close to the edge of the medium flow passage 12 of the large ball valve 13 to play the main sealing effect, and, when the first ball gasket 20 is sealed and fluid medium leaks, the second ball gasket 22 is used for protecting and sealing the fluid medium leakage, and the pre-tightening spring 24 provides initial sealing pre-tightening force, so that the performance of the ball valve seal is improved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a one-way metal seal ball valve of two spheroids, includes valve body (1), its characterized in that: a big ball valve (13) is arranged in the valve body (1), a small ball valve (14) is arranged in the big ball valve (13), medium flow channels (12) are arranged in the small ball valve (14) and the big ball valve (13), small valve seats (16) are arranged on two sides of the inner wall of the big ball valve (13), big valve seats (18) are arranged at two ends of the big ball valve (13), a first ball cushion seat (19) is arranged in the big valve seat (18), a first ball cushion (20) is arranged in the first ball cushion seat (19), a second ball cushion seat (21) is arranged above the first ball cushion seat (19), a second ball cushion (22) is arranged on one side of the second ball cushion seat (21), a blind hole (23) is arranged on the other side of the second ball cushion seat (21), a valve rod (3) is arranged above the big ball valve (13), and a gasket (11) is arranged on the outer wall of the big ball valve (3), the top of packing ring (11) is provided with packing layer (10), the top of packing layer (10) is provided with packing clamping ring (9), the top of packing clamping ring (9) is provided with gland (8), the top of gland (8) is provided with spacing ring (5), the top of spacing ring (5) is provided with prevents flying ring (4), one side of medium runner (12) is provided with medium export (7), the opposite side of medium runner (12) is provided with medium entry (6).

2. A double-ball one-way metal-seal ball valve according to claim 1, wherein: and a mounting blind hole (15) is arranged below the large ball valve (13).

3. A double-ball one-way metal-seal ball valve according to claim 1, wherein: and a small pressing ring (17) is arranged on one side of the small valve seat (16).

4. A double-ball one-way metal-seal ball valve according to claim 1, wherein: and a pre-tightening spring (24) is arranged in the blind hole (23).

5. A double-ball one-way metal-seal ball valve according to claim 1, wherein: and the packing gland (8) and the packing press ring (9) are fixedly connected through screws.

6. A double-ball one-way metal-seal ball valve according to claim 1, wherein: and a mounting through hole (2) is arranged above the anti-flying ring (4).