CN109029870B - End cover of ball valve - Google Patents

End cover of ball valve Download PDF

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Publication number
CN109029870B
CN109029870B CN201810960905.1A CN201810960905A CN109029870B CN 109029870 B CN109029870 B CN 109029870B CN 201810960905 A CN201810960905 A CN 201810960905A CN 109029870 B CN109029870 B CN 109029870B
Authority
CN
China
Prior art keywords
communicating
ball valve
plate
cylinder
sealing cover
Prior art date
Application number
CN201810960905.1A
Other languages
Chinese (zh)
Other versions
CN109029870A (en
Inventor
邹凯
Original Assignee
良工阀门集团有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 良工阀门集团有限公司 filed Critical 良工阀门集团有限公司
Priority to CN201810960905.1A priority Critical patent/CN109029870B/en
Publication of CN109029870A publication Critical patent/CN109029870A/en
Application granted granted Critical
Publication of CN109029870B publication Critical patent/CN109029870B/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2876Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts

Abstract

The invention discloses an end cover of a ball valve, which relates to the technical field of sealing of a port of the ball valve and at least comprises a driving plate, a pushing plate and a sealing cover, wherein the pushing plate is positioned between the driving plate and the sealing cover, the driving plate and the pushing plate are fixedly connected through a plurality of connecting rods, and the pushing plate and the sealing cover are elastically connected through a plurality of first springs. The invention provides a ball valve sealing end cover which enables two ends of a ball valve not to be subjected to axial force and improves the testing precision, and aims to solve the problem that the two ends of the ball valve are stressed when the existing ball valve leakage detecting equipment is used for testing, so that the deformation of the ball valve is caused and the testing result is influenced.

Description

End cover of ball valve

Technical Field

The invention relates to the technical field of ball valve port sealing, in particular to an end cover of a ball valve.

Background

The ball valve mainly refers to a polyethylene ball valve, the polyethylene ball valve is used as an opening and closing switch in a natural gas pipe network, air tightness test is needed before delivery, and otherwise, great potential safety hazards are generated. When the existing ball valve leakage detection equipment is used for carrying out air tightness test, force application devices such as an air cylinder and a jack are often adopted to clamp two ends of a ball valve, and then air pressure is filled into an inner cavity of the ball valve to carry out test, but the polyethylene ball valve is made of plastic materials, and axial stress easily causes deformation of the ball valve, so that a test result is influenced.

Disclosure of Invention

The invention provides a ball valve sealing end cover which enables two ends of a ball valve not to be subjected to axial force and improves the testing precision, and aims to solve the problem that the two ends of the ball valve are stressed when the existing ball valve leakage detecting equipment is used for testing, so that the deformation of the ball valve is caused and the testing result is influenced.

In order to achieve the purpose, the invention adopts the following technical scheme: an end cover of a ball valve at least comprises a driving plate, a pushing plate and a sealing cover, wherein the pushing plate is positioned between the driving plate and the sealing cover, the driving plate and the pushing plate are fixedly connected through a plurality of connecting rods, and the pushing plate and the sealing cover are elastically connected through a plurality of first springs;

the utility model discloses a ball valve, including the preceding socket that bulldozes the board, the central axis translation of socket is used for the ball valve to take over and stretch into in the preceding socket, the left end of clamping ring is equipped with the second annular inclined plane that is the form of expanding along the central axis of clamping ring, and the clamping ring is used for the sealing washer of fixing a position and is annular sealing washer constant head tank between first annular inclined plane and the second annular inclined plane, the sealing washer is located the sealing washer constant head tank, and the front end of clamping ring stretches out in the preceding terminal surface of sealed lid.

Preferably, the seal ring is an O-ring seal.

Preferably, the aperture of the front socket is equal to the inner diameter of the pressing ring.

Preferably, an air path communicating vessel is arranged on the lower side of the pushing plate and comprises a communicating vessel outer cylinder, a communicating vessel piston and a communicating vessel piston rod, the communicating vessel outer cylinder is tubular, the outer wall of the communicating vessel outer cylinder is fixed with the pushing plate, the central axis of the communicating vessel outer cylinder is parallel to the central axis of the sealing cover, a front end plate is arranged at one end of the communicating vessel outer cylinder, which is consistent with the opening direction of the front socket, a rear end plate is arranged at the other end of the communicating vessel outer cylinder, a piston rod through hole is formed in the front end plate, and an air pressure balancing hole is formed in; the communicating device piston is arranged in the communicating device outer barrel and is in sliding sealing fit with the inner wall of the communicating device outer barrel, one end of the communicating device piston rod is fixed with one end face of the communicating device piston, the other end of the communicating device piston rod penetrates through the piston rod through hole to extend to the outer side of the communicating device outer barrel, and the communicating device piston rod is in sliding sealing fit with the piston rod through hole; a piston return spring is arranged between the other end of the communicating vessel piston and the rear end plate; the communicating device outer barrel penetrates through the inner wall and the outer wall to be provided with a communicating device air inlet and a communicating device air outlet, the communicating device air outlet is located between the communicating device piston and the front end plate and is communicated with the pressurization inflation hole of the sealing cover, and the communicating device air inlet is located between the communicating device piston and the rear end plate and is connected with an external air source.

Preferably, a buffer block is arranged at one end of the communicating vessel piston rod which is not connected with the communicating vessel piston.

Therefore, the invention has the following beneficial effects: 1. the outer wall of the ball valve connecting pipe is tightly held to realize sealing, so that the ball valve is not stressed in the axial direction, and the testing precision is improved; 2. the gas path communicating vessel is arranged, and gas is automatically added after the port of the ball valve is sealed, so that the automation degree is high; 3. simple structure, low manufacturing cost and convenient operation.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural view of another aspect of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

FIG. 4 is a sectional view of the outer cylinder of the interconnector of the present invention.

FIG. 5 is a schematic diagram of the overall structure of the test state of the present invention.

Fig. 6 is a partially enlarged view of the test state of the present invention.

Fig. 7 is a partial top view of the test condition of the present invention.

Fig. 8 is a cross-sectional view of the test state of the present invention.

1: a drive plate; 2: a push plate; 3: a sealing cover; 4: a connecting rod; 5: a first spring; 6: pressing a ring; 7: a front socket; 8: a seal ring; 9: a first annular chamfer; 10: a second annular chamfer; 11: a sealing ring positioning groove; 12: a gas path communicating vessel; 13: a communicator outer cylinder; 14: a connector piston; 15: a piston return spring; 16: a communicating vessel piston rod; 17: an air outlet of the communicating vessel; 18: a communicating vessel air inlet; 19: a front end plate; 20: a rear end plate; 21: a piston rod through hole; 22: an air pressure balancing hole; 23: a buffer block; 24: a pressurized inflation hole; 25: a ball valve; 26: positioning the frame; 27: a left positioning seat; 28: a right positioning seat; 29: a left positioning bayonet; 30: a right positioning bayonet; 31: and a left polished rod.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

An end cover of a ball valve, referring to fig. 1 to 8, comprises a sealing cover 3, a pushing plate 2 and a driving plate 1 in sequence from front to back, wherein the pushing plate 2 is located between the driving plate 1 and the sealing cover 3, the driving plate 1 and the pushing plate 2 are fixedly connected through two connecting rods 4, and the pushing plate 2 and the sealing cover 3 are elastically connected through two first springs 5.

The sealing cover 3 is in a horizontal cylinder shape, one side of the sealing cover 3, which is far away from the push-press plate 2, is provided with a front socket 7 for the ball valve 25 to take over and stretch into along the axis of the sealing cover, the caliber size of the front socket 7 is matched with the outer diameter size of the ball valve 25, the bottom surface of the front socket 7 is penetrated and provided with a pressurizing inflation hole 24, the opening of the front socket 7 is provided with a sealing ring 8 and a pressing ring 6, the sealing ring 8 is an O-shaped sealing ring, the aperture of the front socket 7 is equal to the inner diameter of the pressing ring 6, the pressing ring 6 can translate along the central axis of the front socket 7 in the front socket 7, a first annular inclined plane 9 which is in an expanding shape along the central axis of the sealing cover 3 is arranged in the front socket 7, the rear end of the pressing ring 6 is provided with a second annular inclined plane 10 which is in an expanding shape along the central axis of the pressing ring 6, the sealing ring 8 is positioned in the sealing ring positioning groove 11, and the front end of the pressing ring 6 extends out of the front end face of the sealing cover 3.

The downside that bulldozes board 2 is equipped with an air circuit linker 12, air circuit linker 12 includes linker urceolus 13, linker piston 14 and linker piston rod 16, linker urceolus 13 is the tubulose, and the outer wall of linker urceolus 13 is fixed with bulldozing board 2, and the central axis of linker urceolus 13 is parallel with the central axis of sealed lid 3, and the one end of being unanimous with preceding socket 7 opening direction on the linker urceolus 13 is equipped with front end plate 19, and the other end is equipped with rear end plate 20, piston rod through hole 21 has been seted up on the front end plate 19, be equipped with atmospheric pressure balancing hole 22 on the rear end plate 20. The communicating vessel piston 14 is arranged in the communicating vessel outer cylinder 13 and is in sliding sealing fit with the inner wall of the communicating vessel outer cylinder 13, one end of the communicating vessel piston rod 16 is fixed with one end face of the communicating vessel piston 14, the other end of the communicating vessel piston rod passes through the piston rod through hole 21 and extends to the outer side of the communicating vessel outer cylinder 13, and the communicating vessel piston rod 16 is in sliding sealing fit with the piston rod through hole 21; a piston return spring 15 is arranged between the other end of the communicating vessel piston 14 and the rear end plate 20; the outer cylinder 13 of the communicating vessel is provided with communicating vessel air inlets 18 and communicating vessel air outlets 17 by penetrating through the inner wall and the outer wall, the communicating vessel air outlets 17 are positioned between the communicating vessel piston 14 and the front end plate 19 and are communicated with the pressurizing and inflating hole 24 of the sealing cover 3, and the communicating vessel air inlets 18 are positioned between the communicating vessel piston 14 and the rear end plate 20 and are connected with an external air source. In a non-test state, the air outlet hole 17 of the communicating device and the air inlet hole 18 of the communicating device are isolated and not communicated by the communicating device piston 14; when the connector piston rod 16 is subjected to a rearward driving force, the connector piston 14 is slidable to the rear side of the connector outlet hole 17, so that the connector outlet hole 17 and the connector inlet hole 18 are both located on the same side as the connector piston 14 and communicate.

During testing, the air inlet 18 of the communicating vessel is connected with an external air source through an air pipe, the valve core of the ball valve 25 to be tested is rotated to a closed state, and then the ball valve 25 is clamped on a positioning rack 26, wherein the positioning rack 26 comprises a left positioning seat 27 and a right positioning seat 28, the left positioning seat and the right positioning seat are oppositely arranged on the left and right sides, a left positioning bayonet 29 for positioning a left connecting pipe of the ball valve is arranged on the left positioning seat, and a right positioning bayonet 30 for positioning a right connecting pipe of the ball valve 25 is arranged on the right positioning seat; the left positioning bayonet and the right positioning bayonet are both U-shaped bayonets with upward openings, the size of the left positioning bayonet is matched with the outer diameter of the left connecting pipe of the ball valve 25, and the size of the right positioning bayonet is matched with the outer diameter of the left connecting pipe of the ball valve 25. And a left connecting pipe of the ball valve 25 is clamped on the left positioning bayonet of the left positioning seat, and a right connecting pipe of the ball valve 25 is clamped on the right positioning bayonet of the right positioning seat. Two left polished rods 31 are transversely fixed on the left side face of the left positioning seat 27, the two left polished rods 31 are arranged in parallel, the left side and the right side of the pushing plate 2 are respectively provided with a pushing plate guide hole, the two pushing plate guide holes are in one-to-one correspondence with the two left polished rods 31 and are in sliding fit, the left side and the right side of the sealing cover 3 are respectively provided with a sealing cover guide hole, the two sealing cover guide holes are in one-to-one correspondence with the two left polished rods 31 and are in sliding fit, and the pushing plate and the left sealing cover both play a role in guiding through the two left.

The front socket 7 of the sealing cover 3 faces the left end part of the ball valve, the driving plate 1 is pushed to move towards the ball valve 25 by using power sources such as a screw motor, an air cylinder and the like, in the moving process of the driving plate 1, the push plate 2 and the sealing cover 3 will also move along with the driving plate 1, and during the movement of the sealing cover 3, the left connecting pipe of the ball valve 25 extends into the front inserting opening 7 of the sealing cover 3, the sealing cover 3 continues to move, the front side surface of the press ring 6 is abutted against the left side surface of the left positioning seat 27, at the moment, the press ring 6 stops moving, the sealing cover 3 continues moving, the distance between the first annular inclined surface 9 and the second annular inclined surface 10 is gradually reduced, the sealing ring 8 in the sealing ring positioning groove 11 is extruded by the first annular inclined surface 9 and the second annular inclined surface 10 to shrink inwards, the outer wall of the left connecting pipe of the ball valve 25 is tightly held, the sealing is realized by the outer wall of the left connecting pipe of the ball valve 25, and then the sealing cover 3 also stops moving. The pushing plate 2 continues to move to compress the first spring 5, the air channel communicating vessel 12 also continues to move along with the pushing plate 2, in the process that the air channel communicating vessel 12 continues to move, the front end of the communicating vessel piston rod 16 also abuts against the left side face of the left positioning seat 27, the communicating vessel piston rod 16 and the communicating vessel piston 14 are blocked to stop moving forwards, the communicating vessel outer cylinder 13 continues to move along with the pushing plate 2, the piston return spring 15 starts to be compressed, and when the communicating vessel piston 14 moves to the rear side of the communicating vessel air outlet 17 relative to the communicating vessel outer cylinder 13, the communicating vessel air outlet 17 and the communicating vessel air inlet 18 are both located on the front side of the communicating vessel piston 14 and are communicated. An external air source can sequentially pass through the communicating vessel air inlet hole 18, the communicating vessel air outlet hole 17 and the pressurization and inflation hole 24 and finally enter the left cavity of the ball valve 25 to be used as a test air pressure to increase the air pressure in the left cavity of the ball valve 25. At this moment, the operator only needs to adopt other sealing devices to seal the right end of the ball valve 25, and judges whether the ball valve 25 leaks or not by monitoring the air pressure change in the cavity of the right connecting pipe of the ball valve 25. When the air pressure value in the cavity of the right connecting pipe of the ball valve 25 is increased continuously, the fact that gas in the left cavity of the ball valve 25 flows to the right cavity of the ball valve 25 through the valve core of the ball valve 25 is indicated, namely the ball valve 25 leaks; when the air pressure value in the cavity of the right connecting pipe of the ball valve 25 is kept unchanged, it is indicated that no air flows into the right cavity of the ball valve 25 in the left cavity of the ball valve 25, namely the ball valve 25 is qualified.

Claims (4)

1. An end cover of a ball valve, characterized in that: the device at least comprises a driving plate (1), a pushing plate (2) and a sealing cover (3), wherein the pushing plate (2) is positioned between the driving plate (1) and the sealing cover (3), the driving plate (1) and the pushing plate (2) are fixedly connected through a plurality of connecting rods (4), and the pushing plate (2) and the sealing cover (3) are elastically connected through a plurality of first springs (5);
the sealing cover (3) is in a horizontal cylinder shape, one side, far away from the push plate (2), of the sealing cover (3) is provided with a front socket (7) used for a ball valve (25) to take over and stretch into along the axis of the sealing cover, the bottom surface of the front socket (7) penetrates through a pressurizing and inflating hole (24), an opening of the front socket (7) is provided with a sealing ring (8) and a pressing ring (6), the pressing ring (6) can translate along the central axis of the front socket (7) in the front socket (7), a first annular inclined plane (9) which is in an expanding shape along the central axis of the sealing cover (3) is arranged in the front socket (7), the left end of the pressing ring (6) is provided with a second annular inclined plane (10) which is in an expanding shape along the central axis of the pressing ring (6), and an annular positioning groove (11) used for positioning the sealing ring (8) and being annular is formed between the first annular inclined plane (, the sealing ring (8) is positioned in the sealing ring positioning groove (11), and the front end of the pressing ring (6) extends out of the front end face of the sealing cover (3);
an air path communicating vessel (12) is arranged on the lower side of the pushing plate (2), the air path communicating vessel (12) comprises a communicating vessel outer cylinder (13), a communicating vessel piston (14) and a communicating vessel piston rod (16), the communicating vessel outer cylinder (13) is tubular, the outer wall of the communicating vessel outer cylinder (13) is fixed with the pushing plate (2), the central axis of the communicating vessel outer cylinder (13) is parallel to the central axis of the sealing cover (3), a front end plate (19) is arranged at one end of the communicating vessel outer cylinder (13) consistent with the opening direction of the front socket (7), a rear end plate (20) is arranged at the other end of the communicating vessel outer cylinder, a piston rod through hole (21) is formed in the front end plate (19), and an air pressure balance hole (22) is formed in; the communicating device piston (14) is arranged in the communicating device outer cylinder (13) and is in sliding sealing fit with the inner wall of the communicating device outer cylinder (13), one end of the communicating device piston rod (16) is fixed with the end face of one end of the communicating device piston (14), the other end of the communicating device piston rod passes through the piston rod through hole (21) and extends to the outer side of the communicating device outer cylinder (13), and the communicating device piston rod (16) is in sliding sealing fit with the piston rod through hole (21); a piston return spring (15) is arranged between the other end of the communicating vessel piston (14) and the rear end plate (20); the outer cylinder (13) of the communicating device is provided with a communicating device air inlet hole (18) and a communicating device air outlet hole (17) by penetrating through the inner wall and the outer wall, the communicating device air outlet hole (17) is located between a communicating device piston (14) and a front end plate (19) and is communicated with a pressurizing and inflating hole (24) of a sealing cover (3), and the communicating device air inlet hole (18) is located between the communicating device piston (14) and a rear end plate (20) and is connected with an external air source.
2. An end cap for a ball valve according to claim 1, wherein: the sealing ring (8) is an O-shaped sealing ring.
3. An end cap for a ball valve according to claim 1, wherein: the aperture of the front socket (7) is equal to the inner diameter of the pressing ring (6).
4. An end cap for a ball valve according to claim 1, wherein: and a buffer block (23) is arranged at one end of the communicating vessel piston rod (16) which is not connected with the communicating vessel piston (14).
CN201810960905.1A 2018-08-22 2018-08-22 End cover of ball valve CN109029870B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810960905.1A CN109029870B (en) 2018-08-22 2018-08-22 End cover of ball valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810960905.1A CN109029870B (en) 2018-08-22 2018-08-22 End cover of ball valve

Publications (2)

Publication Number Publication Date
CN109029870A CN109029870A (en) 2018-12-18
CN109029870B true CN109029870B (en) 2020-05-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810960905.1A CN109029870B (en) 2018-08-22 2018-08-22 End cover of ball valve

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Country Link
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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110220067A (en) * 2019-06-10 2019-09-10 赵桂凤 A kind of sealing pressure maintaining capping of gas ductwork

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739845C1 (en) * 1997-09-11 1999-02-11 Kraewer Hans Peter Gas supply line testing device
WO2015181609A1 (en) * 2014-05-28 2015-12-03 Dafram S.P.A. Means and methods for detecting leakage in ball valves
CN104165734B (en) * 2014-07-08 2017-02-01 宁波市宇华电器有限公司 End cap for testing ball valve sealing
CN204228344U (en) * 2014-12-12 2015-03-25 杭州戴雷科技有限公司 A kind of end cover mechanism of ball valve air tightness test machine
CN204649358U (en) * 2015-06-02 2015-09-16 宁波市宇华电器有限公司 Ball valve air-tight test end cover mechanism
CN105003713B (en) * 2015-08-11 2017-10-24 宁波恒元精工管阀科技有限公司 A kind of ball valve sealing end cap
CN105181273A (en) * 2015-09-11 2015-12-23 王国良 Ball valve detection equipment
CN106323560A (en) * 2016-09-10 2017-01-11 桐乡市鑫朗智能科技有限公司 Automatic sealing performance testing equipment
CN207502130U (en) * 2017-10-30 2018-06-15 天津永升阀门有限公司 A kind of shut-off valve tightness detector

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Effective date of registration: 20200430

Address after: 325024 No. 32 Qiang Road, Yongxing street, Longwan District, Wenzhou, Zhejiang

Applicant after: LIANGGONG VALVE GROUP Co.,Ltd.

Address before: 510000 No. 668, Whampoa Avenue, Tianhe District, Guangdong, Guangzhou

Applicant before: Zou Kai

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