CN104165734B - End cap for testing ball valve sealing - Google Patents

End cap for testing ball valve sealing Download PDF

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Publication number
CN104165734B
CN104165734B CN201410320822.8A CN201410320822A CN104165734B CN 104165734 B CN104165734 B CN 104165734B CN 201410320822 A CN201410320822 A CN 201410320822A CN 104165734 B CN104165734 B CN 104165734B
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CN
China
Prior art keywords
end cap
side end
front side
described
ball valve
Prior art date
Application number
CN201410320822.8A
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Chinese (zh)
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CN104165734A (en
Inventor
孙斌
杨铭耀
李伟富
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宁波市宇华电器有限公司
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Priority to CN201410320822.8A priority Critical patent/CN104165734B/en
Publication of CN104165734A publication Critical patent/CN104165734A/en
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Publication of CN104165734B publication Critical patent/CN104165734B/en

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Abstract

The invention relates to an end cap for testing ball valve sealing. The ball valve test in the prior art adopts the technology that an external device clamps the two ends of the ball valve to form sealing, so that, when the external device tightly clamps the ball valve, the ball valve can be deformed to affect the test. The invention provides an end cap for testing ball sealing, comprising a front side end cover and a back side end cap; the front side end cap comprises a base body and a guiding shaft; and the back side end cap is installed on the guiding shaft. The end cap for testing the ball valve sealing is characterized by comprising a sealing ring, a recovering spring and a position-limiting ring; the recovering spring sleeves the guiding shaft and is positioned between the back side end cap and the front side end cap; the position-limiting ring is positioned on the guiding shaft; the recovering spring, the back side end cap and the position-limiting cap are successively arranged on the guiding shaft; a first annular decline plane is positioned on the base body of the front side end cap; a second annular decline plane is positioned on the back side end cap; and an installation groove is formed between the first annular decline plane and the second annular decline plane. The invention is reasonable in structure design, simple in structure and operation, low in cost, good in sealing, and can reduce the fault judgment.

Description

A kind of end cap of sealing property of ball valves test

Technical field

The present invention relates to a kind of end cap of sealing property of ball valves test, for testing the sealing of ball valve.

Background technology

Ball valve is to make opening and closing element with the spheroid with manhole, and spheroid rotates with valve rod, to realize the valve of switching motion. Ball valve is mainly used as cut-out, distribution and the flow direction changing medium.

Industrial polyethylene (pe) ball valve is the important control parts of pipe network, therefore using front requiring pressurization to carry out sealing property Test.When prior art is tested to ball valve, generally it is placed in the outside at ball valve two ends using sealing gasket or sealing ring, use cylinder simultaneously Or the force application apparatus such as jack are clamped in ball valve two ends, so that sealing gasket or two ends of sealing ring and ball valve form sealing, It is passed through compressed gas again and check its sealing property toward inside ball valve.

As shown in figure 5, existing assay device includes frame, jack and pressing plate, frame has base plate, in base plate The heart has pore, and jack is connected with frame and pressing plate respectively, and jack controls pressing plate to move up and down, and during test, ball valve is contained in Between pressing plate and base plate, and so that pressing plate is pushed by jack, so that ball valve is clamped between pressing plate and base plate, install After the completion of, assay device is immersed in the water together with ball valve, and toward pore pressurization, checks ball valve each several part by observing bubble Air-tightness.This assay device has the disadvantages that, 1, operating process complicated, its frame heavier-weight, need to be by external equipment Frame is immersed in the water, and the installation of ball valve also more bothers;2nd, when operation jack pushes pressing plate, the more difficult palm of its dynamics Control, pushes not, pressing plate may be made not firm with the sealing of ball valve end, thus affecting the accuracy tested, brings Qualitative erroneous judgement, pushes if excessively, ball valve can be made to deform, lead to ball valve end face out-of-flatness so that ball valve with Sealing cannot be formed between pressing plate, bring qualitative erroneous judgement, in addition, pushing excessively, also directly can damage ball valve, causing Loss.

Authorization Notice No. cn 202547894 u, in the Chinese patent of authorized announcement date 2012.11.21, discloses one Plant valve air tightness detection system, it includes frames, and described frames are installed to clamp the clamping machine of measured piece Structure, described clamping device is arranged on working plate, described clamping device is connected with inflation simulation detector unit, its feature exists In: described detecting system also includes water tank, and described water tank is arranged in frames, and described water tank is located at described clamping device Lower section, described clamping device is arranged on frock clamp, and described frock clamp is arranged on to drive frock clamp to move up and down Lift drive mechanism on, described lift drive mechanism is arranged in frames.This valve air tightness detection system beneficial Effect is mainly manifested in: have range estimation (bubble) method and the advantage of inflation simulation (pressure change) method concurrently, can not only be quick Whether the airtight property amount of detection product is qualified, also allows for the leak source of operator's detection labelling substandard product, improves this The efficiency of class product remanufacturing process.But it has the disadvantages that the manufacturing cost of wherein whole system is higher;Between valve There is certain error unavoidably, thus the compression cylinder of this system may damage some valves by pressure, causes damage;Due to valve it Between there is error, this system is difficult to make valve by the gross all fully seal, and brings qualitative erroneous judgement.

Content of the invention

It is an object of the invention to overcoming above-mentioned deficiency present in prior art, and provide a kind of reasonable in design, Structure is simple, simple to operation, low cost, good sealing effect, is effectively reduced the end cap of the sealing property of ball valves test of erroneous judgement.

The present invention solves the above problems and be the technical scheme is that the end cap of this sealing property of ball valves test includes front side end Lid and rear side end cap, described front side end cap and rear side end cap are coaxially disposed, and described its axial direction of front side end cover rim has gas Hole, described front side end cap includes pedestal and the axis of guide being arranged on pedestal and being coaxially disposed with pedestal, and described rear side end cap can Slide be sleeved on the axis of guide it is characterised in that: also include sealing ring, be used for making rear side end cap and pedestal in its natural state Keep detached returning spring and the spacing ring for adjusting spacing between rear side end cap and pedestal, described returning spring is sleeved on On the axis of guide and positioned between rear side end cap and the pedestal of front side end cap, described spacing ring is arranged on the axis of guide, described reply Spring, rear side end cap and spacing ring are arranged on the axis of guide successively, and the pedestal of described front side end cap is provided with along front side end cap It is in axially the first annular inclined-plane drawing shape in, the axial direction that described rear side end lid is provided with along rear side end cap is in draw the second ring of shape in Shape inclined-plane, forms for installing sealing ring and mounting groove ringwise between described first annular inclined-plane and the second annular slope. Present configuration is simple, reasonable in design, simple to operate, the sealed reliable between end cap and ball valve;During use, end cap is integrally inserted Enter to ball valve one end, rear side end cap passes through outside delivery device spacing backstop, by pore toward pressure testing in ball valve, using it from close Feng Xing, thus formed in ball valve thering is the enclosed environment of pressure, because end cap adopts interpolation type, without external agency by ball valve Two ends clamp, thus do not have external force and affect the air-tightness of ball valve;The specific implementation of self sealss is: when end cap inserts ball During valve one end, pressurizeed in ball valve by pore, make there is internal pressure, using this internal pressure between front side end cap and ball valve So that the side end cap direction movement backward of front side end cap, then side end cap is due to by outside delivery device for effect to front side end cap Spacing backstop and remain stationary as, finally make first annular inclined-plane move and promote sealing ring toward the second annular slope, make sealing Circle extends out, and then so that sealing ring is fully contacted with ball valve inwall and extrude, and forms closing, thus ensureing between end cap and ball valve Sealing;Due to the setting of returning spring, when shedding the air pressure in ball valve, front side end cap and sealing ring successively reset so that End cap integrally can smoothly be extracted out from ball valve.

Form conical section between first annular inclined-plane of the present invention and pedestal, the bottom of described rear side end cap have for Part accommodates the cavity of this conical section.Front side end cap can be inserted partially in the cavity of rear side end cap, thus increasing front side end cap Side end cap movement backward stroke so that the amount that extends out of sealing ring increases it is ensured that can be formed between sealing ring and ball valve inwall Sealing.

Form cavity, if having on described rear side end lid between front side of the present invention end cap, rear side end cap and sealing ring Do the pressure stable hole for the air pressure in holding chamber body and external pressure balance, described pressure stable hole is connected with cavity.Pressure stable hole can make Air pressure in cavity and external pressure balance, prevent cavity due to sealing ring respectively with front side end cap and rear side end cap seal and shape After becoming closing space, front side end cap cannot move opposite posterior end cap.

Pore of the present invention is located at the center of front side end cap.Pore is located at during center so that during external pressurized, can make ball Valve internal pressure equalizes, and prevents front side end cap from tilting and cannot move.

Angle between first annular inclined-plane of the present invention and the axis of front side end cap and the second annular slope and front side Angle between the axis of end cap is equal.Can prevent sealing ring from twisting, and sealing ring and ball valve contact internal walls may be led to Inequality, causes gas leakage, thus affecting accuracy of detection.

Present invention additionally comprises gas-tpe fitting, described gas-tpe fitting is arranged on the axis of guide and is connected with pore.Gas-tpe fitting Setting convenient be connected with external air source.

Connecting portion for being connected with outside delivery device is provided with the end face of rear side end cap of the present invention.Connecting portion Setting be easy to outside pusher and be attached with rear side end cap.

The present invention compared with prior art, has advantages below and effect: structure is simple, reasonable in design, simple to operate, end Sealed reliable between lid and ball valve;During use, end cap is integrally inserted into ball valve one end, rear side end cap passes through outside pusher Structure spacing backstop, by pore toward pressure testing in ball valve, using its self seals, thus form the closing with pressure in ball valve Ball valve two ends because end cap adopts interpolation type, are clamped without external agency, thus do not have external force and affect the gas of ball valve by environment Close property;The specific implementation of self sealss is: when end cap insertion ball valve one end, is pressurizeed in ball valve by pore, before making There is between side end cap and ball valve internal pressure, using this internal pressure to the effect of front side end cap so that front side end cap backward Side end cap direction is moved, and then side end cap, due to being remained stationary as by outside delivery device spacing backstop, finally makes the first ring Shape inclined-plane moves toward the second annular slope and promotes sealing ring, so that sealing ring is extended out, and then makes sealing ring abundant with ball valve inwall Contacting and extrude, forming closing, thus ensureing the sealing between end cap and ball valve;Due to the setting of returning spring, when shedding During air pressure in ball valve, front side end cap and sealing ring successively resets so that end cap integrally can smoothly be extracted out from ball valve.

Brief description

Fig. 1 is the main structure diagram of the end cap of sealing property of ball valves test in the embodiment of the present invention.

Fig. 2 is end cap and the structural representation during cooperation of ball valve inwall of sealing property of ball valves test.

Fig. 3 is the perspective view of Fig. 1.

Fig. 4 is the perspective view of Fig. 1.

Fig. 5 is the device being used for sealing property of ball valves test in prior art.

Label declaration: front side end cap 1, rear side end cap 2, sealing ring 3, returning spring 4, spacing ring 5, gas-tpe fitting 6, pore 11st, pedestal 12, the axis of guide 13, first annular inclined-plane 14, conical section 15, guiding surface 16, through hole 21, the second annular slope 22, Cavity 23, pressure stable hole 24, connecting portion 25, mounting groove 31, cavity 32.

Specific embodiment

The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following examples are to this Bright explanation and the invention is not limited in following examples.

Embodiment 1.

Referring to Fig. 1 to Fig. 4, the end cap of the sealing property of ball valves test of the present embodiment includes front side end cap 1, rear side end cap 2, close Seal 3, returning spring 4, spacing ring 5 and gas-tpe fitting 6.Wherein sealing ring 3 is silica gel material, and it has high resiliency and high drawing Rate, the section of sealing ring 3 is circle.

Front side end cap 1 in the present embodiment and rear side end cap 2 are coaxially disposed, and front side end cap 1 has along along its axial direction Pore 11, front side end cap 1 includes pedestal 12 and the axis of guide 13 being arranged on pedestal 12 and being coaxially disposed with pedestal 12, pedestal 12 It is integral type structure with the axis of guide 13, rear side end cap 2 has through hole 21, rear side end cap 2 is slidably covered by its through hole 21 It is contained on the axis of guide 13, by the distance between end cap on rear side of this scalable 2 and pedestal 12 of front side end cap 1.

Returning spring 4 in the present embodiment is used for making rear side end cap 2 and pedestal 12 keep in its natural state separating, and replys Spring 4 is sleeved on the axis of guide 13 and is located between rear side end cap 2 and the pedestal 12 of front side end cap 1, and returning spring 4 is in rear side end Compressed so as to have elastic potential energy between the pedestal 12 of lid 2 and front side end cap 1.After spacing ring 5 in the present embodiment is used for adjusting Spacing between side end cap 2 and pedestal 12, spacing ring 5 is threaded on the axis of guide 13, returning spring 4, rear side end cap 2 and limit Position ring 5 is arranged on the axis of guide 13 successively, when spacing ring 5 rotates, and in the presence of returning spring 4, end cap 2 on rear side of scalable Spacing and pedestal 12 between.The axial direction that the pedestal 12 of the front side end cap 1 in the present embodiment is provided with along front side end cap 1 is in draw in The first annular inclined-plane 14 of shape, the axial direction that rear side end cap 2 is provided with along rear side end cap 2 is in draw the second annular slope 22 of shape in, Formed between described first annular inclined-plane 14 and the second annular slope 22 for installing sealing ring 3 and mounting groove ringwise 31, When spacing ring 5 adjusts the spacing between rear side end cap 2 and pedestal 12, scalable first annular inclined-plane 14 and the second annular slope 22 Between initial distance, to make sealing ring 3 adapt to the ball valve of model slightly difference with this.

During use, outside delivery device is fixing with rear side end cap 2, and end cap is integrally inserted into ball valve by outside delivery device In, by pore 11 toward pressure testing in ball valve, make to form sealing between end cap and the inwall of ball valve using the self sealss of end cap, And form the enclosed environment with pressure in ball valve, now just ball valve can be placed in water, detect ball by observing bubble The air-tightness of valve, after the completion of detection, sheds the air pressure in ball valve, due to the setting of returning spring 4, before returning spring 4 will promote Side end cap 1, makes front side end cap 1 and sealing ring 3 successively resets so that end cap integrally can smoothly be extracted out from ball valve, be also convenient for End cap is inserted ball valve, thus just completing the air-leakage test to ball valve during test next time.When ball valve intermediate switch is in close During state, ball valve one end arranges the monolateral sealing that end cap can test this end, all arranges end cap without left and right two ends.This ball The end cover structure of valve performing leak test is simple, reasonable in design, simple to operate, the sealed reliable between end cap and ball valve, its making Cost is relatively low.

The concrete principle of the self sealss of the end cap in the present embodiment is: when end cap insertion ball valve one end, by pore Pressurization in 11 pairs of ball valves, makes there is internal pressure, using this internal pressure to front side end cap 1 between front side end cap 1 and ball valve So that front side end cap 1 side end cap 2 direction movement backward, then side end cap 2 is due to by outside delivery device spacing backstop for effect Remain stationary as, so that first annular inclined-plane 14 is moved so that mounting groove 31 tapers into toward the second annular slope 22, gradually The mounting groove 31 diminishing will make the radial compression to end cap for the sealing ring 3, so that sealing ring 3 is extended out, and then make sealing ring 3 and ball valve Inwall is fully contacted and extrudes, and forms closing, thus ensureing the sealing between end cap and ball valve.Using self sealss, this is former Reason, simply, fast and effectively in ball valve can form sealing, just directly can carry out air-leakage test to ball valve, need not be outside Ball valve two ends are clamped and are sealed by mechanism, thus do not have external force and affect the air-tightness of ball valve, and its accuracy of detection is higher, right Ball valve not damaged itself.

Form conical section 15, the bottom of rear side end cap 2 is opened between first annular inclined-plane 14 in the present embodiment and pedestal 12 There is the cavity 23 for partly accommodating this conical section 15, thus front side end cap 1 can be inserted partially into the cavity 23 of rear side end cap 2 In, thus increase front side end cap 1 side end cap 2 movement backward stroke so that the amount that extends out of sealing ring 3 increases it is ensured that sealing Sealing can be formed between circle 3 and ball valve inwall.

Form cavity 32 between front side end cap 1 in the present embodiment, rear side end cap 2 and sealing ring 3, rear side end cap 2 is opened There are some pressure stable holes 24 for keeping the air pressure in cavity 32 and external pressure balance, pressure stable hole 24 is connected with cavity 32, surely Pressure hole 24 can make air pressure in cavity 32 balance with external pressure, prevent cavity 32 due to sealing ring 3 respectively with front side end cap 1 and After rear side end cap 2 seals and forms closing space, front side end cap 1 cannot move opposite posterior end cap 2.

Pore 11 in the present embodiment is located at the center of front side end cap 1, and pore 11 is located at during center so that external pressurized When, ball valve internal pressure can be made to equalize, prevent front side end cap 1 from tilting and cannot move, if the position of pore 11 is not in front side If the center of end cap 1, when pressurizeing toward in ball valve, front side end cap 1 causes due to unbalance stress, and affects its movement.

Angle a between first annular inclined-plane 14 in the present embodiment and front side end cap 1 axis and the second annular slope 22 Angle b and front side end cap 1 axis between is equal, first annular inclined-plane 14 mobile and so that mounting groove 31 is reduced thus outwardly against During sealing ring 3, sealing ring 3 is subject to the power of first annular inclined-plane 14 and the second annular slope 22, can make the stress of sealing ring 3 both sides More equalize, can prevent sealing ring 3 from twisting, if the angle a between first annular inclined-plane 14 and front side end cap 1 axis with Angle b between second annular slope 22 and front side end cap 1 axis is unequal, and first annular inclined-plane 14 is mobile and makes mounting groove 31 Reduce thus during outwardly against sealing ring 3, the discontinuity equalization of sealing ring 3 both sides may be led to, causes sealing ring 3 to turn round Turn, so that sealing ring 3 is uneven with ball valve contact internal walls, cause gas leakage, affect accuracy of detection.

In the present embodiment, the angle a between first annular inclined-plane 14 and front side end cap 1 axis is 45 degree, first annular inclined-plane 14 along front side end cap 1 when axially side end cap 2 direction is mobile backward, sealing ring 3 is in first annular inclined-plane 14 and the second circular slanting Under the collective effect in face 22, the radial direction along front side end cap 1 extends out, thus with ball valve contact internal walls and extruding formation sealing.

Gas-tpe fitting 6 in the present embodiment is arranged on the axis of guide 13 and is connected with pore 11, the setting side of gas-tpe fitting 6 Just it is connected with external air source.

Connecting portion 25 for being connected with outside delivery device is provided with the end face of rear side end cap 2 in the present embodiment, The setting of connecting portion 25 is easy to outside pusher and is attached with rear side end cap 2.

Front side end cap 1 in the present embodiment is provided with guiding surface 16, is easy to front side end cap 1 and is aligned with ball valve and inserts ball In valve.

Above content described in this specification is only illustration made for the present invention.The affiliated technology of the present invention The technical staff in field can make various modifications or supplement or adopt similar mode to described specific embodiment Substitute, the content without departing from description of the invention or surmount scope defined in the claims, all should be belonged to this The protection domain of invention.

Claims (5)

1. a kind of end cap of sealing property of ball valves test, including front side end cap and rear side end cap, described front side end cap and rear side end cap It is coaxially disposed, described its axial direction of front side end cover rim has pore, described front side end cap includes pedestal and is arranged on pedestal The axis of guide that is upper and being coaxially disposed with pedestal, described rear side end cap be slidably sleeved on the axis of guide it is characterised in that: also wrap Include sealing ring, be used for making rear side end cap and pedestal keep detached returning spring in its natural state and for adjusting rear side end cap The spacing ring of spacing and pedestal between, described returning spring is sleeved on the axis of guide and is located at the seat of rear side end cap and front side end cap Between body, described spacing ring is arranged on the axis of guide, and described returning spring, rear side end cap and spacing ring are arranged in the axis of guide successively On, the axial direction that the pedestal of described front side end cap is provided with along front side end cap is in draw the first annular inclined-plane of shape, described rear side end in Covering the axial direction being provided with along rear side end cap is in draw the second annular slope, described first annular inclined-plane and second annular slope of shape in Between formed for installing sealing ring and mounting groove ringwise;
Form conical section, the bottom of described rear side end cap has to accommodate for part and is somebody's turn to do between described first annular inclined-plane and pedestal The cavity of conical section;
Angle between described first annular inclined-plane and the axis of front side end cap and the axis of the second annular slope and front side end cap Between angle equal.
2. sealing property of ball valves according to claim 1 test end cap it is characterised in that: described front side end cap, rear side end Form cavity, the air pressure described rear side end lid having in some bodies for holding chamber is put down with external pressure between lid and sealing ring The pressure stable hole of weighing apparatus, described pressure stable hole is connected with cavity.
3. sealing property of ball valves according to claim 1 test end cap it is characterised in that: described pore is located at front side end cap Center.
4. according to claim 1 or 2 or 3 sealing property of ball valves test end cap it is characterised in that: also include trachea and connect Head, described gas-tpe fitting is arranged on the axis of guide and is connected with pore.
5. according to claim 1 or 2 or 3 sealing property of ball valves test end cap it is characterised in that: described rear side end cap Connecting portion for being connected with outside delivery device is provided with end face.
CN201410320822.8A 2014-07-08 2014-07-08 End cap for testing ball valve sealing CN104165734B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410320822.8A CN104165734B (en) 2014-07-08 2014-07-08 End cap for testing ball valve sealing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410320822.8A CN104165734B (en) 2014-07-08 2014-07-08 End cap for testing ball valve sealing

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CN104165734B true CN104165734B (en) 2017-02-01

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CN104316271A (en) * 2014-11-04 2015-01-28 天津博益气动股份有限公司 Air tightness testing tool for valve bodies of unthreaded hole connector types
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
CN105181272A (en) * 2015-09-11 2015-12-23 王国良 Valve sealing test machine
CN105422905B (en) * 2015-12-22 2017-08-25 中国计量大学 A kind of end cover with stopping function
CN107152993B (en) * 2017-05-04 2019-04-02 浙江庆发管业科技有限公司 A kind of polyethylene ball valve air-tightness detection device
CN109029870B (en) * 2018-08-22 2020-05-29 良工阀门集团有限公司 End cover of ball valve

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