CN211550598U

CN211550598U - Hard sealing ball valve

Info

Publication number: CN211550598U
Application number: CN201921865344.3U
Authority: CN
Inventors: 蔡金国; 王云; 季兵
Original assignee: Yancheng Ruihua Petroleum Machinery Technology Co ltd
Current assignee: Yancheng Ruihua Petroleum Machinery Technology Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-09-22
Anticipated expiration: 2029-10-31

Abstract

The utility model provides a hard sealing ball valve, a groove with a transverse opening is arranged on a valve seat, the opening of the groove is abutted against the inner wall of a valve body, a pre-tightening spring is arranged in the groove, and a hard alloy sealing surface is arranged at the contact position between the valve seat and a ball body; the pre-tightening spring comprises a main spring and an auxiliary spring, an upper fixing plate and a lower fixing plate are fixedly installed at two ends of the main spring, an upper fixing wall and a lower fixing wall are respectively and oppositely arranged at the outer sides of the upper fixing plate and the lower fixing plate, a first fixing block and a second fixing block are respectively arranged at two ends of the outer surface of the upper fixing wall, a third fixing block is arranged at one end, close to the upper fixing wall, of the outer surface of the lower fixing wall, a movable rod penetrates through the middle parts of the second fixing block and the third fixing block, fixing caps are respectively arranged at two ends of the movable rod, the auxiliary spring is sleeved in the middle part of the; has the advantages of simple and reasonable structure and good stability.

Description

Hard sealing ball valve

Technical Field

The utility model belongs to the technical field of the ball valve, concretely relates to hard seal ball valve.

Background

The ball valve is widely applied to industries such as petroleum, chemical industry, metallurgy, urban central heating and the like. The ball valve is a starting and closing part used in a pipeline and used for controlling the flow and the on-off of fluid in the pipeline, and a valve core in the valve rotates through a rotating handle above the valve, so that the flow rate of the fluid passing through the valve can be regulated and controlled. Because the ball valve has good sealing performance, the ball valve is widely applied to industries such as petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmacy, water conservancy, electric power and the like, and plays a significant role in national economy; when the ball-type valve core rotates, abrasion generated on the valve seat causes a gap between the valve seat and the valve core, and the pressed elastic compensation piece generates an elastic reset effect to push the valve seat to the gap direction, so that the gap is reduced, and a sealing effect is achieved; however, the conventional pre-tightening spring is often adopted in the existing elastic compensation piece and is arranged in the groove; however, the hard seal ball valve usually works in a high-pressure high-temperature environment, the pre-tightening spring is easily heated to deform and is easily clamped with the groove, and when the hard seal ball valve fails, the sealing performance is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hard seal ball valve to solve the pretension spring simple structure who adopts on the current hard seal ball valve, receive the environmental impact easily and take place trouble such as card is dead.

The utility model provides a following technical scheme:

a hard sealing ball valve comprises a valve body, a valve seat and a ball body, wherein the ball body is embedded in the valve body, the valve seat is arranged at the contact position of the valve body and the ball body, a flow passage is arranged in the center of the ball body, openings are arranged at the positions, corresponding to the two ends of the flow passage, of the valve seat and the valve body, a groove with a transverse opening is arranged on the valve seat, the opening of the groove abuts against the inner wall of the valve body, a pre-tightening spring is arranged in the groove, and a hard alloy sealing surface is arranged at the contact position between the valve seat and; the pretension spring comprises a main spring and an auxiliary spring, an upper fixing plate and a lower fixing plate are fixedly installed at two ends of the main spring, the upper fixing plate and the outer side of the lower fixing plate are respectively and relatively provided with an upper fixing wall and a lower fixing wall, two ends of the outer surface of the upper fixing wall are respectively provided with a first fixing block and a second fixing block, the outer surface of the lower fixing wall is close to one end of the upper fixing wall and is provided with a third fixing block, a movable rod is arranged in the middle of the second fixing block and the third fixing block in a penetrating mode, two ends of the movable rod are respectively provided with a fixing cap, the auxiliary spring is sleeved in the middle of the movable rod, and the main spring is embedded in the upper.

Further, the length of the upper fixing wall is smaller than that of the lower fixing wall.

Furthermore, the upper fixing plate is contacted with the bottom of the groove, and the lower fixing plate is contacted with the inner wall of the valve body.

Furthermore, the first fixed block, the second fixed block and the third fixed block have the same structure, and the outer surfaces of the tops of the first fixed block, the second fixed block and the third fixed block are cambered surfaces.

Furthermore, guide grooves are formed in the tops of the first fixing block, the second fixing block and the third fixing block, a top spring is arranged at the bottom of each guide groove, a top block is connected to each top spring, and the outer surface of the top of each top block is a spherical surface.

Furthermore, the inner surface of the middle part of the guide groove and the outer surface of the middle part of the top block are respectively provided with a limiting groove and a limiting block.

The utility model has the advantages that:

the utility model relates to a hard sealing ball valve, the pretension spring of which adopts reasonable design, which ensures that the ball valve can deal with high temperature and high pressure environment, the surface has dead-locking fault, and the stability of the hard sealing ball valve is improved; the upper fixed wall is connected with the lower fixed wall through the movable rod, so that the telescopic stroke of the main spring is more stable, and the main spring is prevented from being deformed and damaged due to deflection in the telescopic stroke, thereby reducing the gap between the valve seat and the ball body and ensuring the sealing performance of the valve seat and the ball body; through the auxiliary spring, the overall elasticity of the pre-tightening spring can be improved, the telescopic stability can be improved, the design is reasonable, the work is stable, and the large-force popularization can be realized.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of a pretension spring according to the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of a first anchor block structure;

labeled as: 1. the valve comprises a valve body, 2 parts of a valve seat, 21 parts of a groove, 3 parts of a ball body, 4 parts of a flow passage, 5 parts of a pre-tightening spring, 51 parts of a main spring, 52 parts of an auxiliary spring, 53 parts of an upper fixing plate, 54 parts of a lower fixing plate, 55 parts of an upper fixing wall, 56 parts of a lower fixing wall, 57 parts of a first fixing block, 58 parts of a second fixing block, 59 parts of a third fixing block, 60 parts of a movable rod, 61 parts of a fixing cap, 62 parts of a guide groove, 63 parts of a top spring, 64 parts of a top block, 65 parts of a limiting groove, 66 parts of a limiting block and 6 parts.

Detailed Description

As shown in fig. 1-3, a hard seal ball valve comprises a valve body 1, a valve seat 2 and a ball body 3, wherein the ball body 3 is embedded in the valve body 1, the valve seat 2 is arranged at the contact position of the valve body 1 and the ball body 3, a flow passage 4 is arranged at the center of the ball body 3, openings are arranged at the positions of the valve seat 2 and the valve body 1 corresponding to the two ends of the flow passage, a groove 21 with a transverse opening is arranged on the valve seat 2, the opening of the groove 21 is abutted against the inner wall of the valve body 1, a pre-tightening spring 5 is arranged in the groove 21, and a hard alloy seal surface; the pre-tightening spring 5 comprises a main spring 51 and an auxiliary spring 52, an upper fixing plate 53 and a lower fixing plate 54 are fixedly installed at two ends of the main spring 51, an upper fixing wall 55 and a lower fixing wall 56 are respectively and oppositely arranged on the outer sides of the upper fixing plate 53 and the lower fixing plate 54, a first fixing block 57 and a second fixing block 58 are respectively arranged at two ends of the outer surface of the upper fixing wall 55, a third fixing block 59 is arranged at one end, close to the upper fixing wall 55, of the outer surface of the lower fixing wall 56, a movable rod 60 penetrates through the middle of the second fixing block 58 and the third fixing block 59, fixing caps 61 are respectively arranged at two ends of the movable rod 60, the auxiliary spring 52 is sleeved at the middle of the movable rod 60, and the main.

Specifically, the length of going up fixed wall 55 is less than the length of lower fixed wall 56, upper fixed plate 53 and recess 21 bottom contact, lower fixed plate 54 and the contact of valve body 1 inner wall, first fixed block 57, second fixed block 58 and third fixed block 59 structure is the same and the top surface all is the cambered surface, guide way 62 has all been seted up at first fixed block 57, second fixed block 58 and third fixed block 59 top, the guide way 62 bottom is equipped with top spring 63, be connected with kicking block 64 on the top spring 63, kicking block 64 top surface is the sphere, guide way 62 middle part internal surface and kicking block 64 middle part external surface are equipped with spacing groove 65 and stopper 66 respectively.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hard sealing ball valve comprises a valve body, a valve seat and a ball body, wherein the ball body is embedded in the valve body, the valve seat is arranged at the contact position of the valve body and the ball body, a flow passage is arranged in the center of the ball body, and openings are arranged at the positions, corresponding to the two ends of the flow passage, of the valve seat and the valve body;

the pretension spring comprises a main spring and an auxiliary spring, an upper fixing plate and a lower fixing plate are fixedly installed at two ends of the main spring, the upper fixing plate and the outer side of the lower fixing plate are respectively and relatively provided with an upper fixing wall and a lower fixing wall, two ends of the outer surface of the upper fixing wall are respectively provided with a first fixing block and a second fixing block, the outer surface of the lower fixing wall is close to one end of the upper fixing wall and is provided with a third fixing block, a movable rod is arranged in the middle of the second fixing block and the third fixing block in a penetrating mode, two ends of the movable rod are respectively provided with a fixing cap, the auxiliary spring is sleeved in the middle of the movable rod, and the main spring is embedded in the upper.

2. A hard seal ball valve in accordance with claim 1 wherein said upper retaining wall has a length less than a length of said lower retaining wall.

3. A hard seal ball valve in accordance with claim 2 wherein said upper retainer plate is in contact with the bottom of said recess and said lower retainer plate is in contact with the inner wall of said valve body.

4. The hard seal ball valve as claimed in claim 1, wherein the first, second and third fixing blocks have the same structure and the top outer surface is a cambered surface.

5. The hard seal ball valve according to claim 4, wherein guide grooves are formed in the tops of the first fixed block, the second fixed block and the third fixed block, a top spring is arranged at the bottom of each guide groove, a top block is connected to each top spring, and the outer surface of the top of each top block is spherical.

6. The hard seal ball valve as claimed in claim 5, wherein the guide groove and the top block are respectively provided with a limiting groove and a limiting block on the inner surface of the middle portion thereof and the outer surface of the middle portion thereof.