CN211975943U - Leakage-proof two-piece ball valve - Google Patents
Leakage-proof two-piece ball valve Download PDFInfo
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- CN211975943U CN211975943U CN201922494964.7U CN201922494964U CN211975943U CN 211975943 U CN211975943 U CN 211975943U CN 201922494964 U CN201922494964 U CN 201922494964U CN 211975943 U CN211975943 U CN 211975943U
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Abstract
The utility model discloses a leakage-proof two-piece ball valve, which belongs to the field of valves and comprises a valve body, a valve cover, a ball core and a valve rod, wherein the ball core is provided with a flow passage through hole, two ends of the ball core, which are vertical to the direction of the flow passage through hole, are respectively provided with a sealing plane, the sealing planes are matched with the valve body, a sealing ring is respectively arranged between the sealing planes and the valve body, and the lower end of the valve rod is fixedly connected with one of the sealing planes on the ball core after passing through a shaft hole on the valve body; the valve body is internally provided with two movable valve seats, the movable valve seats are annular, the inner walls of the movable valve seats are matched with the surface of the ball core, the outer walls of the movable valve seats are fixedly connected with guide sleeves, annular guide grooves are formed in the valve body, annular pistons are connected in the annular guide grooves in a sliding mode, the free ends of the guide sleeves are fixed to one sides of the annular pistons, and the other sides of the annular pistons are connected with compression springs. The utility model discloses not only can prevent effectively that revealing from appearing between disk seat and the ball core, can also improve the sealed effect of valve rod department.
Description
Technical Field
The utility model relates to a valve field, in particular to prevent revealing two formula ball valves.
Background
The invention and application of the valve are closely accompanied with human life, production and work, and have thousands of years of history. Due to the continuous increase of the demand, the variety and the specification yield of the valve are continuously and dramatically increased, and according to incomplete statistics, the number of the valve with more than three thousand and more than 3 ten thousand specifications currently exists in China. The valve is an important device for conveying and guiding fluid, and especially in conveying and guiding inflammable, explosive, toxic and harmful dangerous media, strict requirements are provided for the sealing performance and the strength guarantee of the valve in consideration of safety and reliability.
The ball valve is a valve whose opening and closing member (ball) is driven by valve rod and can make rotary motion around the axis of ball valve, and is extensively used because it has the advantages of small volume and that the opening and closing operation can be implemented by only 90 deg. rotation of handle.
However, the existing ball valve has a poor sealing effect between the ball body and the valve seat due to the limitation of the structure of the ball valve, so that the fluid medium leaks to the other side of the pipeline. Meanwhile, the sealing effect between the valve rod and the valve body is not ideal, so that the fluid medium is leaked to the outside, and the opening and closing operation is difficult to perform due to the fact that the fluid medium erodes the valve rod.
SUMMERY OF THE UTILITY MODEL
Two formula ball valves to prior art existence are sealed not tight, appear the problem of revealing easily, the utility model aims to provide a prevent revealing two formula ball valve.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a leakage-proof two-piece ball valve comprises a valve body, a valve cover, a ball core and a valve rod, wherein a flow passage through hole is formed in the ball core, the axis of the flow passage through hole passes through the ball core of the ball core, sealing planes are arranged at two ends of the ball core, which are perpendicular to the direction of the flow passage through hole, the sealing planes are matched with the valve body, a sealing ring is arranged between each sealing plane and the valve body, and the lower end of the valve rod is fixedly connected with one sealing plane on the ball core after penetrating through a shaft hole on the valve body; the ball valve is characterized in that two movable valve seats are arranged in the valve body, the movable valve seats are annular, the inner walls of the movable valve seats are matched with the surface of the ball core, the outer walls of the movable valve seats are fixedly connected with guide sleeves, annular guide grooves are formed in the valve body, annular pistons are connected in the annular guide grooves in a sliding mode, the free ends of the guide sleeves are fixed to one sides of the annular pistons, and the other sides of the annular pistons are connected with compression springs; the movable valve seat, the guide sleeve, the annular guide groove, the annular piston, the compression spring and the runner through hole on the ball core are coaxial, and the diameter of the movable valve seat is larger than that of the runner through hole.
Furthermore, the annular guide groove is provided with a balance hole communicated with the inner wall of the valve body, and the balance hole and the compression spring are both positioned on the same side of the annular piston.
Preferably, the movable valve seat comprises a seat body and a sealing seat ring mounted on the seat body, the sealing seat ring is made of a high polymer material, and the high polymer material is polytetrafluoroethylene, polychlorotrifluoroethylene, polyfluorinated ethylene propylene, polyamide or polyether ether ketone.
Preferably, a valve rod sealing ring is arranged between the valve rod and the valve body.
Furthermore, the guide sleeve is matched with the annular guide groove, and an axial groove is formed in the inner wall and/or the outer wall of the guide sleeve.
Furthermore, a driven shaft is fixed on the other sealing plane of the ball core, the driven shaft is rotatably connected with the valve body, and the driven shaft and the valve rod are coaxial.
By adopting the technical scheme, because the sealing planes at the two ends of the ball core and the sealing rings on the sealing planes are arranged, when the ball core and the valve seat are sealed and leaked, the sealing rings still can play a good sealing role, prevent fluid media from leaking between the valve rod and the valve body and play a role in protecting the valve rod; due to the arrangement of the movable valve seat, the guide sleeve, the annular guide groove and the annular piston, after the movable valve seat is in sealing contact with the surface of the ball core, the fluid medium is limited by the guide sleeve and can only flow into the annular guide groove, and the fluid medium is blocked due to the limitation of the annular piston, so that the fluid medium cannot flow to the valve rod or pass through the ball core; meanwhile, due to the arrangement of the compression spring, the movable valve seat is always tightly attached to the surface of the ball core under the action of the elastic force of the compression spring.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
In the figure, 1-valve body, 2-valve cover, 3-ball core, 31-runner through hole, 32-sealing plane, 33-sealing ring, 4-valve rod, 5-movable valve seat, 6-guide sleeve, 7-annular guide groove, 8-annular piston, 9-compression spring and 10-balance hole.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship of the structure of the present invention based on the drawings, and are only for the convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.
In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in relation to the present scheme in specific terms according to the general idea of the present invention.
As shown in fig. 1, the leakage-proof two-piece ball valve comprises a valve body 1, a valve cover 2, a ball core 3 and a valve rod 4. The valve body 1 and the valve cover 2 are both cylindrical integrally, the left end of the valve cover 2 is detachably connected to the right end of the valve body 1 through threads, and the outer wall of the valve cover 2 is hexagonal to facilitate screwing; and the inner walls of the left end of the valve body 1 and the right end of the valve cover 2 are provided with threads so as to be conveniently connected with a pipeline.
The whole ball core 3 is spherical, the ball core 3 is positioned in the valve body 1, the diameter of the ball core 3 is larger than the inner diameter of the valve body 2, and the ball core 3 is used for separating two ends of the valve body 1. Meanwhile, in order to enable a medium to circulate between two ends of the valve body 1, a flow passage through hole 31 is formed in the ball core 3, the axis of the flow passage through hole 31 passes through the ball center of the ball core 3, a shaft hole is formed in the valve body 1, the lower end of the valve rod 4 penetrates through the shaft hole and then is fixedly connected with the ball core 3, for example, clamping connection or screw connection can be achieved, and under the rotation of the valve rod 4, the flow passage through hole 31 in the ball core 3 can be changed between two states of communicating the two ends of the valve body 1 (a ball valve opening state) and the two ends of the valve body 1 (a ball valve cutting state), so that the effect of switching on and off the fluid.
In this embodiment, two ends (the upper end and the lower end shown in fig. 1) of the ball core 3 perpendicular to the direction of the flow passage through hole 31 are provided with sealing planes 32, the upper end and the lower end of the inner wall of the valve body 1 are provided with contact planes matched with the sealing planes 32, a sealing ring 33 is arranged between the sealing planes 32 and the contact planes of the valve body 1, and the lower end of the valve rod 4 is fixedly connected with one (the upper end) of the sealing planes 32 on the ball core 3. Meanwhile, a stem packing (not shown) is further provided between the stem 4 and the valve body 1.
In this embodiment, two movable valve seats 5 are provided in the valve body 1, and the two movable valve seats 5 respectively seal the ball core 3 at the left and right ends, so that the fluid medium can only pass through the flow passage through hole 31 of the ball core 3. Specifically, in this embodiment, the movable valve seat 5 is annular, the inner wall (facing the core 3) of the movable valve seat is adapted to the surface of the core 3 (the inner wall of the movable valve seat 5 is spherical), the diameter of the movable valve seat 5 is larger than the diameter of the flow passage through hole 31, the movable valve seat 5 and the flow passage through hole 31 are coaxially arranged, and the movable valve seat 5 and the valve body 1 are coaxial.
As shown in fig. 2, the outer wall (the side facing away from the ball core 3) of the movable valve seat 5 is fixedly connected with a guide sleeve 6; meanwhile, in the direction parallel to the axis of the valve body 1, two sides of the valve body 1 facing the movable valve seat 5 (the ball core 3) are provided with annular guide grooves 7, annular pistons 8 are connected in the annular guide grooves 7 in a sliding mode, piston sealing rings are arranged between the annular pistons 8 and the annular grooves 7 and used for preventing media on two sides of the annular pistons from flowing by. The free end of the guide sleeve 6 is fixed on one side of the annular piston 8, the other side of the annular piston 8 is connected with a compression spring 9, when in use, one end of the compression spring 9 is abutted against the annular piston 8, and the other end is abutted against the bottom surface of the annular guide groove 7. In this embodiment, the movable valve seat 5, the guide sleeve 6, the annular guide groove 7, the annular piston 8, and the compression spring 9 are arranged to have a common axis, and the common axis coincides with the flow passage through hole 31 of the ball core 3 in the fully open state of the valve.
The movable valve seat 5 is always attached to the surface of the ball core 3 under the action of the elastic force of the compression spring 9, so that sealing is formed; under the intercepting operation, fluid medium is firstly blocked by the ball core 3 and limited by the guide sleeve 6, and only can flow to the annular piston 8, but cannot flow to one side of the valve rod 4 by bypassing the annular guide groove 7, so that the valve rod 4 is protected on one hand, and the sealing effect between the movable valve seat 5 and the ball core 3 is also ensured on the other hand; in the flow operation, the fluid medium first flows through the flow passage openings 31 in the core 3 and likewise cannot flow around the guide sleeve 6 and the annular guide groove 7 to the valve rod 4.
Generally, the movable valve seat 5 includes a seat body and a sealing seat ring installed on the seat body, the seat body is made of metal material and fixed with the guide sleeve 6 by welding, bolt connection or screw connection, the seat body is provided with an installation ring groove, the sealing seat ring is embedded in the installation ring groove, the sealing seat ring is usually made of high polymer material, and the high polymer material can be polytetrafluoroethylene, polychlorotrifluoroethylene, polyperfluoroethylene propylene, polyamide or polyetheretherketone.
In another embodiment, the annular guide groove 7 is provided with a balancing hole 10 communicating with the inner wall of the valve body 1, the balancing hole 10 and the compression spring 9 being located on the same side of the annular piston 8. The setting of balancing hole 10 can balance the water pressure difference of 8 both sides of annular piston on the one hand, eliminates the extra water pressure that compression spring 9 need overcome, makes the better promotion movable valve seat 5 of its elasticity and ball core 3 sealed, and on the other hand still makes the undulant condition of water pressure in the pipeline can transmit annular piston 8 through balancing hole 10 on, makes annular piston 8 pass through guide sleeve 6 and promotes movable valve seat 5 and compress tightly ball core 3, also can realize good sealed under the undulant condition of assurance water pressure.
In another embodiment, the guiding sleeve 6 is configured to fit the annular guiding groove 7 (to fit the thickness), and an axial groove is provided on the inner wall and/or the outer wall of the guiding sleeve 6, and the axial groove is used for receiving silt, dregs and the like to prevent jamming.
In another embodiment, a driven shaft is fixed on the other sealing plane 32 of the ball core 3, the driven shaft is rotatably connected with the lower end of the valve body 1, and the driven shaft and the valve rod 4 are coaxial; in this embodiment, the lower end of the inner wall of the valve body 1 is provided with a blind hole, and the driven shaft is disposed in the blind hole and is in clearance fit with the blind hole.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (6)
1. The utility model provides a prevent revealing two formula ball valves, includes valve body, valve gap, ball core and valve rod, its characterized in that: the ball core is provided with a flow passage through hole, the axis of the flow passage through hole passes through the ball core of the ball core, two ends of the ball core, which are perpendicular to the direction of the flow passage through hole, are respectively provided with a sealing plane, the sealing planes are matched with the valve body, a sealing ring is arranged between each sealing plane and the valve body, and the lower end of the valve rod is fixedly connected with one sealing plane on the ball core after penetrating through the shaft hole on the valve body; the ball valve is characterized in that two movable valve seats are arranged in the valve body, the movable valve seats are annular, the inner walls of the movable valve seats are matched with the surface of the ball core, the outer walls of the movable valve seats are fixedly connected with guide sleeves, annular guide grooves are formed in the valve body, annular pistons are connected in the annular guide grooves in a sliding mode, the free ends of the guide sleeves are fixed to one sides of the annular pistons, and the other sides of the annular pistons are connected with compression springs; the movable valve seat, the guide sleeve, the annular guide groove, the annular piston, the compression spring and the runner through hole on the ball core are coaxial, and the diameter of the movable valve seat is larger than that of the runner through hole.
2. The leak-proof two-piece ball valve according to claim 1, wherein: the annular guide groove is provided with a balance hole communicated with the inner wall of the valve body, and the balance hole and the compression spring are both positioned on the same side of the annular piston.
3. The leak-proof two-piece ball valve according to claim 1, wherein: the movable valve seat comprises a seat body and a sealing seat ring arranged on the seat body, wherein the sealing seat ring is made of high polymer materials, and the high polymer materials are polytetrafluoroethylene, polychlorotrifluoroethylene, polyperfluoroethylpropylene, polyamide or polyether ether ketone.
4. The leak-proof two-piece ball valve according to claim 1, wherein: and a valve rod sealing ring is arranged between the valve rod and the valve body.
5. The leak-proof two-piece ball valve according to claim 1, wherein: the guide sleeve is matched with the annular guide groove, and an axial groove is formed in the inner wall and/or the outer wall of the guide sleeve.
6. The leak-proof two-piece ball valve according to claim 1, wherein: and a driven shaft is fixed on the other sealing plane of the ball core, the driven shaft is rotatably connected with the valve body, and the driven shaft and the valve rod are coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922494964.7U CN211975943U (en) | 2019-12-31 | 2019-12-31 | Leakage-proof two-piece ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922494964.7U CN211975943U (en) | 2019-12-31 | 2019-12-31 | Leakage-proof two-piece ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211975943U true CN211975943U (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922494964.7U Expired - Fee Related CN211975943U (en) | 2019-12-31 | 2019-12-31 | Leakage-proof two-piece ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211975943U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992355A (en) * | 2022-06-13 | 2022-09-02 | 凯瑞特阀业有限公司 | High-temperature and high-pressure resistant ball valve and control mechanism thereof |
| CN116906615A (en) * | 2023-09-13 | 2023-10-20 | 华英阀业有限公司 | Ball valve support and ultralow temperature ball valve thereof |
| CN118602137A (en) * | 2024-08-08 | 2024-09-06 | 捷能阀门制造有限公司 | High-safety double-sealing control valve |
-
2019
- 2019-12-31 CN CN201922494964.7U patent/CN211975943U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992355A (en) * | 2022-06-13 | 2022-09-02 | 凯瑞特阀业有限公司 | High-temperature and high-pressure resistant ball valve and control mechanism thereof |
| CN114992355B (en) * | 2022-06-13 | 2024-10-01 | 凯瑞特阀业集团有限公司 | High-temperature and high-pressure resistant ball valve and control mechanism thereof |
| CN116906615A (en) * | 2023-09-13 | 2023-10-20 | 华英阀业有限公司 | Ball valve support and ultralow temperature ball valve thereof |
| CN116906615B (en) * | 2023-09-13 | 2023-12-01 | 华英阀业有限公司 | Ball valve support and ultralow temperature ball valve thereof |
| CN118602137A (en) * | 2024-08-08 | 2024-09-06 | 捷能阀门制造有限公司 | High-safety double-sealing control valve |
| CN118602137B (en) * | 2024-08-08 | 2024-10-18 | 捷能阀门制造有限公司 | High-safety double-sealing control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201120 Termination date: 20211231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |