CN104165734A - End cover for testing sealing performance of ball valve - Google Patents
End cover for testing sealing performance of ball valve Download PDFInfo
- Publication number
- CN104165734A CN104165734A CN201410320822.8A CN201410320822A CN104165734A CN 104165734 A CN104165734 A CN 104165734A CN 201410320822 A CN201410320822 A CN 201410320822A CN 104165734 A CN104165734 A CN 104165734A
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- end cap
- side end
- ball valve
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Abstract
The invention relates to an end cover for testing the sealing performance of a ball valve. When the ball valve in the prior art is tested, the external device is adopted to clamp the ball valve to form sealing at two ends of the ball valve, and when the external device clamps the ball valve, the ball valve is easy to deform to influence detection. The invention provides an end cover for testing the sealing performance of a ball valve, which comprises a front end cover and a rear end cover, wherein the front end cover comprises a seat body and a guide shaft, and the rear end cover is sleeved on the guide shaft, and is characterized in that: the return spring is sleeved on the guide shaft and positioned between the rear end cover and the seat body of the front end cover, the limiting ring is arranged on the guide shaft, the return spring, the rear end cover and the limiting ring are sequentially arranged on the guide shaft, a first annular inclined plane is arranged on the seat body of the front end cover, a second annular inclined plane is arranged on the rear end cover, and a mounting groove is formed between the first annular inclined plane and the second annular inclined plane. The invention has the advantages of reasonable structural design, simple structure, simple and convenient operation, low cost and good sealing effect, and can effectively reduce misjudgment.
Description
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 that spheroid rotates with valve rod, to realize the valve of switching motion with making opening and closing element with the spheroid of manhole.Ball valve is mainly used as cut-out, distributes and change the flow direction of medium.
Industrial tygon (PE) ball valve is the important control assembly of pipe network, before therefore using, requires pressurization to carry out experiments of sealing performance.When prior art is tested ball valve, conventionally adopt sealing gasket or O-ring seal to be placed in the outside at ball valve two ends, be clamped in ball valve two ends with the force application apparatus such as cylinder or lifting jack simultaneously, thereby make two ends of sealing gasket or O-ring seal and ball valve form sealing, then pass into pressure gas toward ball valve inside and check its sealing property.
As shown in Figure 5, existing test unit comprises frame, lifting jack and pressing plate, in frame, there is base plate, the center of base plate has pore, lifting jack is connected with frame and pressing plate respectively, lifting jack control pressing plate moves up and down, when test, ball valve is contained between pressing plate and base plate, and by lifting jack, pressing plate is pressed down, thereby ball valve is clamped between pressing plate and base plate, after installation, test unit is immersed in the water together with ball valve, and toward pore pressurization, checks the impermeability of ball valve each several part by observing bubble.This test unit has following shortcoming, and 1, operating process complexity, its frame weight is heavier, need frame be immersed in the water by external unit, and also trouble comparatively of the installation of ball valve; 2,, when operation lifting jack presses down pressing plate, the more difficult control of its dynamics, presses down inadequate words, may make the sealing of pressing plate and ball valve end not firm, thereby the accuracy of impact test is brought qualitative erroneous judgement, press down excessively, can make ball valve deform, cause the out-of-flatness of ball valve end face, thereby make cannot form sealing between ball valve and pressing plate, bring qualitative erroneous judgement, in addition, press down excessive words, also can directly damage ball valve, cause damage.
Granted publication CN 202547894 U, in the Chinese patent of Granted publication day 2012.11.21, a kind of valve air tightness detection system is disclosed, it comprises frames, in described frames, install in order to clamp the clamping device of measured piece, described clamping device is arranged on working plate, on described clamping device, be connected with inflation simulation detecting unit, it is characterized in that: described detection system also comprises water tank, described water tank is arranged in frames, described water tank is positioned at the below of described clamping device, described clamping device is arranged on frock clamp, described frock clamp is arranged on to drive on the lift drive mechanism that frock clamp moves up and down, described lift drive mechanism is arranged in frames.The beneficial effect of this valve air tightness detection system is mainly manifested in: the advantage that has range estimation (bubble) method and inflation simulation (pressure variation) method concurrently, whether impermeability quality that can not only fast detecting product is qualified, also convenient operation personnel detect the also leak source of mark substandard product, improve the efficiency of this type of product remanufacturing process.But it has following shortcoming: wherein the manufacturing cost of whole system is higher; Between valve, there is unavoidably certain error, thereby the compression cylinder of this system may damage some valve by pressure, cause damage; Owing to there being error between valve, this system is difficult to make all sealings completely of valve by the gross, brings qualitative erroneous judgement.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and a kind of reasonable in design is provided, simple in structure, simple to operation, cost is low, and good sealing effect can effectively reduce the end cap of the sealing property of ball valves test of erroneous judgement.
The present invention addresses the above problem adopted technical scheme: the end cap of this sealing property of ball valves test comprises front side end cap and rear side end cap, described front side end cap and rear side end cap coaxially arrange, on described its axial direction of front side end cover rim, have pore, described front side end cap comprise pedestal and be arranged on pedestal and with the axis of guide of the coaxial setting of pedestal, described rear side end cap is slidably sleeved on the axis of guide, it is characterized in that: also comprise O-ring seal, for make rear side end cap and pedestal under state of nature, keeps separation returning spring and for regulating the spacing ring of spacing between rear side end cap and pedestal, described returning spring is sleeved on the axis of guide and between rear side end cap and the pedestal of front side end cap, described spacing ring is arranged on the axis of guide, described returning spring, rear side end cap and spacing ring are arranged on the axis of guide successively, the pedestal of described front side end cap is provided with and is axially along front side end cap the first annular slope that draws shape in, described rear side end covers to be provided with and is axially along rear side end cap the second annular slope that draws shape in, between described the first annular slope and the second annular slope, be formed for installing O-ring seal and ringwise mounting groove.The present invention is simple in structure, reasonable in design, simple to operate, and the sealing between end cap and ball valve is reliable, when use, end cap entirety is inserted into ball valve one end, rear side end cap is by outside delivery device spacing backstop, by pore toward pressure testing in ball valve, utilize its self sealss, thereby form the enclosed environment with pressure in ball valve, because end cap adopts interpolation type, without external agency, ball valve two ends are clamped, thereby do not have external force and affect the impermeability of ball valve, the specific implementation of self sealss is: in the time that end cap inserts ball valve one end, by pore to pressurizeing in ball valve, make to there is internal pressure between front side end cap and ball valve, utilize the effect of this internal pressure to front side end cap, make front side end cap backward side end cap direction move, then side end cap is owing to being subject to outside delivery device spacing backstop to keep motionless, finally make the first annular slope move and promote O-ring seal toward the second annular slope, O-ring seal is extended out, and then make O-ring seal fully contact and push with ball valve inwall, form sealing, thereby ensure the sealing between end cap and ball valve, due to the setting of returning spring, when shed in ball valve air pressure time, front side end cap and O-ring seal successively reset, and end cap entirety can be extracted out smoothly from ball valve.
Between the first annular slope of the present invention and pedestal, form conical section, the bottom of described rear side end cap has the cavity that holds this conical section for part.Front side end cap can partial insertion in the cavity of rear side end cap, thereby increase front side end cap backward side end cap move stroke, the amount that O-ring seal extends out is increased, ensure can form sealing between O-ring seal and ball valve inwall.
Between front side of the present invention end cap, rear side end cap and O-ring seal, form cavity, described rear side end covers and has somely for keeping air pressure in cavity and the pressure stable hole of external pressure balance, and described pressure stable hole is communicated with cavity.Pressure stable hole can make air pressure and the external pressure balance in cavity, prevents that cavity is because O-ring seal forms after enclosure space with front side end cap and rear side end cap seal respectively, and front side end cap cannot move relative to rear side end cap.
Pore of the present invention is positioned at the center of front side end cap.When pore is positioned at center, while making external pressurized, can make the equilibrium of ball valve internal pressure, prevent that front side end cap from tilting and cannot move.
Angle between the first annular slope of the present invention and the axis of front side end cap equates with the angle between the second annular slope and the axis of front side end cap.Can prevent that O-ring seal from twisting, and it is uneven to cause O-ring seal to contact with ball valve inwall, causes gas leakage, thereby affects accuracy of detection.
The present invention also comprises gas-tpe fitting, and described gas-tpe fitting is arranged on the axis of guide and with pore and is communicated with.Arranging conveniently of gas-tpe fitting is connected with external air source.
On the end face of rear side end cap of the present invention, be provided with the connecting portion for being connected with outside delivery device.The setting of connecting portion is convenient to outside pusher and is connected with rear side end cap.
The present invention compared with prior art, has the following advantages and effect: simple in structure, reasonable in design, simple to operate, the sealing between end cap and ball valve is reliable, when use, end cap entirety is inserted into ball valve one end, rear side end cap is by outside delivery device spacing backstop, by pore toward pressure testing in ball valve, utilize its self sealss, thereby form the enclosed environment with pressure in ball valve, because end cap adopts interpolation type, without external agency, ball valve two ends are clamped, thereby do not have external force and affect the impermeability of ball valve, the specific implementation of self sealss is: in the time that end cap inserts ball valve one end, by pore to pressurizeing in ball valve, make to there is internal pressure between front side end cap and ball valve, utilize the effect of this internal pressure to front side end cap, make front side end cap backward side end cap direction move, then side end cap is owing to being subject to outside delivery device spacing backstop to keep motionless, finally make the first annular slope move and promote O-ring seal toward the second annular slope, O-ring seal is extended out, and then make O-ring seal fully contact and push with ball valve inwall, form sealing, thereby ensure the sealing between end cap and ball valve, due to the setting of returning spring, when shed in ball valve air pressure time, front side end cap and O-ring seal successively reset, and end cap entirety can be extracted out smoothly from ball valve.
Brief description of the drawings
Fig. 1 is the main TV structure schematic diagram of the end cap of sealing property of ball valves test in the embodiment of the present invention.
Fig. 2 is the structural representation of the end cap of sealing property of ball valves test while coordinating with ball valve inwall.
Fig. 3 is the perspective view of Fig. 1.
Fig. 4 is the perspective view of Fig. 1.
Fig. 5 is the device for sealing property of ball valves test in prior art.
Label declaration: front side end cap 1, rear side end cap 2, O-ring seal 3, returning spring 4, spacing ring 5, gas-tpe fitting 6, pore 11, pedestal 12, the axis of guide 13, the first annular slope 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.
Embodiment
Below in conjunction with accompanying drawing and by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to 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 comprises front side end cap 1, rear side end cap 2, O-ring seal 3, returning spring 4, spacing ring 5 and gas-tpe fitting 6.Wherein O-ring seal 3 is silica gel material, and it has high resiliency and high elongation rate, and the cross section of O-ring seal 3 is circular.
Front side end cap 1 in the present embodiment and rear side end cap 2 coaxially arrange, front side end cap 1 is along having pore 11 on its axial direction, front side end cap 1 comprise pedestal 12 and be arranged on pedestal 12 and with the axis of guide 13 of the coaxial setting of pedestal 12, pedestal 12 is integral type structure with the axis of guide 13, on rear side end cap 2, there is through hole 21, rear side end cap 2 is slidably sleeved on the axis of guide 13 by its through hole 21, thus the distance between adjustable rear side end cap 2 and the pedestal 12 of front side end cap 1.
Returning spring 4 in the present embodiment is for making rear side end cap 2 keep under state of nature with pedestal 12 separating, returning spring 4 is sleeved on the axis of guide 13 and between rear side end cap 2 and the pedestal 12 of front side end cap 1, returning spring 4 is compressed between the pedestal 12 of rear side end cap 2 and front side end cap 1, makes it have elastic potential energy.Spacing ring 5 in the present embodiment is for regulating the spacing between rear 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 spacing ring 5 are arranged on the axis of guide 13 successively, when spacing ring 5 rotates, and under the effect of returning spring 4, the spacing between adjustable rear side end cap 2 and pedestal 12.The pedestal 12 of the front side end cap 1 in the present embodiment is provided with and is axially along front side end cap 1 the first annular slope 14 that draws shape in, rear side end cap 2 is provided with and is axially along rear side end cap 2 the second annular slope 22 that draws shape in, between described the first annular slope 14 and the second annular slope 22, be formed for installing O-ring seal 3 and ringwise mounting groove 31, when spacing ring 5 regulates the spacing between rear side end cap 2 and pedestal 12, initial distance between adjustable the first annular slope 14 and the second annular slope 22, makes O-ring seal 3 adapt to the slightly ball valve of difference of model with this.
When use, outside delivery device and rear side end cap 2 are fixing, outside delivery device is inserted into end cap entirety in ball valve, by pore 11 toward pressure testing in ball valve, utilize the self sealss of end cap to make to form and seal between end cap and the inwall of ball valve, and form and there is the enclosed environment of pressure in ball valve, now just ball valve can be placed in to water, detect the impermeability of ball valve by observing bubble, after detection completes, shed the air pressure in ball valve, due to the setting of returning spring 4, returning spring 4 will promote front side end cap 1, front side end cap 1 and O-ring seal 3 are successively resetted, end cap entirety can be extracted out smoothly from ball valve, also when test convenient next time, end cap is inserted to ball valve, thereby just completed, the impermeability of ball valve is detected.In the time that ball valve intermediate switch is closed condition, the monolateral sealing that ball valve one end arranges end cap can test this end, all arranges end cap without two ends, left and right.The end cover structure of this sealing property of ball valves test is simple, reasonable in design, simple to operate, and the sealing between end cap and ball valve is reliable, and its cost of manufacture is lower.
The concrete principle of the self sealss of the end cap in the present embodiment is: in the time that end cap inserts ball valve one end, by pore 11 to pressurizeing in ball valve, make to there is internal pressure between front side end cap 1 and ball valve, utilize the effect of this internal pressure to front side end cap 1, make front side end cap 1 backward side end cap 2 directions move, then side end cap 2 is owing to being subject to outside delivery device spacing backstop to keep motionless, finally make the first annular slope 14 move toward the second annular slope 22, mounting groove 31 is diminished gradually, the mounting groove 31 diminishing gradually will make the radial compression of O-ring seal 3 to end cap, O-ring seal 3 is extended out, and then make O-ring seal 3 fully contact and push with ball valve inwall, form sealing, thereby ensure the sealing between end cap and ball valve.Adopt this principle of self sealss, can in ball valve, form simply, fast and effectively sealing, just can directly can carry out impermeability detection to ball valve, without external agency, ball valve two ends are clamped and sealed, thereby do not have external force and affect the impermeability of ball valve, its accuracy of detection is higher, to the not damaged of ball valve own.
Between the first annular slope 14 in the present embodiment and pedestal 12, form conical section 15, the bottom of rear side end cap 2 has the cavity 23 that holds this conical section 15 for part, thereby front side end cap 1 can partial insertion in the cavity 23 of rear side end cap 2, thereby increase front side end cap 1 backward side end cap 2 move stroke, the amount that O-ring seal 3 extends out is increased, ensure can form sealing between O-ring seal 3 and ball valve inwall.
Between front side end cap 1, rear side end cap 2 and O-ring seal 3 in the present embodiment, form cavity 32, on rear side end cap 2, have some for keeping air pressure in cavity 32 and the pressure stable hole 24 of external pressure balance, pressure stable hole 24 is communicated with cavity 32, pressure stable hole 24 can make air pressure and the external pressure balance in cavity 32, prevent that cavity 32 is because O-ring seal 3 seals and forms after enclosure space with front side end cap 1 and rear side end cap 2 respectively, front side end cap 1 cannot move relative to rear side end cap 2.
Pore 11 in the present embodiment is positioned at the center of front side end cap 1, when pore 11 is positioned at center, while making external pressurized, can make the equilibrium of ball valve internal pressure, prevent front side end cap 1 from tilting and cannot move, if the center of Bu front side, the position end cap 1 of pore 11, in the time would pressurizeing in ball valve, front side end cap 1, because unbalance stress causes inclination, affects it and moves.
Angle a between the first annular slope 14 and front side end cap 1 axis in the present embodiment equates with the angle b between the second annular slope 22 and front side end cap 1 axis, thereby the first annular slope 14 moves and while making mounting groove 31 reduce outwards crush seal circle 3, O-ring seal 3 is subject to the power of the first annular slope 14 and the second annular slope 22, can make the stressed comparatively balanced of O-ring seal 3 both sides, can prevent that O-ring seal 3 from twisting, if the angle b between the angle a between the first annular slope 14 and front side end cap 1 axis and the second annular slope 22 and front side end cap 1 axis is unequal, thereby the first annular slope 14 moves and while making mounting groove 31 reduce outwards crush seal circle 3, may cause the discontinuity equalization of O-ring seal 3 both sides, cause O-ring seal 3 to twist, thereby it is uneven that O-ring seal 3 is contacted with ball valve inwall, cause gas leakage, affect accuracy of detection.
Angle a in the present embodiment between the first annular slope 14 and front side end cap 1 axis is 45 degree, the first annular slope 14 along front side end cap 1 axially side end cap 2 directions move backward time, O-ring seal 3 is under the acting in conjunction of the first annular slope 14 and the second annular slope 22, radial direction along front side end cap 1 extends out, and seals thereby contact and push to form with ball valve inwall.
Gas-tpe fitting 6 in the present embodiment is arranged on the axis of guide 13 and with pore 11 and is communicated with, and arranging conveniently of gas-tpe fitting 6 is connected with external air source.
On the end face of the rear side end cap 2 in the present embodiment, be provided with the connecting portion 25 for being connected with outside delivery device, the setting of connecting portion 25 is convenient to outside pusher and is connected with rear side end cap 2.
Front side end cap 1 in the present embodiment is provided with guiding surface 16, is convenient to front side end cap 1 and aims at and insert in ball valve with ball valve.
Above content described in this instructions is only made for the present invention illustrating.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment; only otherwise depart from the content of instructions of the present invention or surmount this scope as defined in the claims, all should belong to protection scope of the present invention.
Claims (7)
1. the end cap of a sealing property of ball valves test, comprise front side end cap and rear side end cap, described front side end cap and rear side end cap coaxially arrange, on described its axial direction of front side end cover rim, have pore, described front side end cap comprise pedestal and be arranged on pedestal and with the axis of guide of the coaxial setting of pedestal, described rear side end cap is slidably sleeved on the axis of guide, it is characterized in that: also comprise O-ring seal, for make rear side end cap and pedestal under state of nature, keeps separation returning spring and for regulating the spacing ring of spacing between rear side end cap and pedestal, described returning spring is sleeved on the axis of guide and between rear side end cap and the pedestal of front side end cap, described spacing ring is arranged on the axis of guide, described returning spring, rear side end cap and spacing ring are arranged on the axis of guide successively, the pedestal of described front side end cap is provided with and is axially along front side end cap the first annular slope that draws shape in, described rear side end covers to be provided with and is axially along rear side end cap the second annular slope that draws shape in, between described the first annular slope and the second annular slope, be formed for installing O-ring seal and ringwise mounting groove.
2. the end cap of sealing property of ball valves test according to claim 1, is characterized in that: between described the first annular slope and pedestal, form conical section, the bottom of described rear side end cap has the cavity that holds this conical section for part.
3. the end cap of sealing property of ball valves test according to claim 1, it is characterized in that: between described front side end cap, rear side end cap and O-ring seal, form cavity, described rear side end covers and has somely for keeping air pressure in cavity and the pressure stable hole of external pressure balance, and described pressure stable hole is communicated with cavity.
4. the end cap of sealing property of ball valves test according to claim 1, is characterized in that: described pore is positioned at the center of front side end cap.
5. according to the end cap of the sealing property of ball valves test described in claim 1 or 2 or 3 or 4, it is characterized in that: the angle between described the first annular slope and the axis of front side end cap equates with the angle between the second annular slope and the axis of front side end cap.
6. according to the end cap of the sealing property of ball valves test described in claim 1 or 2 or 3 or 4, it is characterized in that: also comprise gas-tpe fitting, described gas-tpe fitting is arranged on the axis of guide and with pore and is communicated with.
7. according to the end cap of the sealing property of ball valves test described in claim 1 or 2 or 3 or 4, it is characterized in that: on the end face of described rear side end cap, be provided with the connecting portion for being connected with outside delivery device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410320822.8A CN104165734B (en) | 2014-07-08 | 2014-07-08 | End cover for testing sealing performance of ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410320822.8A CN104165734B (en) | 2014-07-08 | 2014-07-08 | End cover for testing sealing performance of ball valve |
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| Publication Number | Publication Date |
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| CN104165734A true CN104165734A (en) | 2014-11-26 |
| CN104165734B CN104165734B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410320822.8A Active CN104165734B (en) | 2014-07-08 | 2014-07-08 | End cover for testing sealing performance of ball valve |
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| CN (1) | CN104165734B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105003713A (en) * | 2015-08-11 | 2015-10-28 | 宁波恒元精工管阀科技有限公司 | Sealing end cover of ball valve |
| CN105181272A (en) * | 2015-09-11 | 2015-12-23 | 王国良 | Valve sealing test machine |
| CN105422905A (en) * | 2015-12-22 | 2016-03-23 | 中国计量学院 | Sealing end cover with retaining function |
| CN107152993A (en) * | 2017-05-04 | 2017-09-12 | 浙江庆发管业科技有限公司 | A kind of polyethylene ball valve air-tightness detection device |
| CN109029870A (en) * | 2018-08-22 | 2018-12-18 | 邹凯 | A kind of end cap of ball valve |
| CN114088312A (en) * | 2021-11-11 | 2022-02-25 | 国网新疆电力有限公司电力科学研究院 | Improved aluminum casting air tightness detection device and detection method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 |
| CN105422905A (en) * | 2015-12-22 | 2016-03-23 | 中国计量学院 | Sealing end cover with retaining function |
| CN105422905B (en) * | 2015-12-22 | 2017-08-25 | 中国计量大学 | A kind of end cover with stopping function |
| CN107152993A (en) * | 2017-05-04 | 2017-09-12 | 浙江庆发管业科技有限公司 | A kind of polyethylene ball valve air-tightness detection device |
| 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 |
| CN109029870A (en) * | 2018-08-22 | 2018-12-18 | 邹凯 | A kind of end cap of ball valve |
| CN114088312A (en) * | 2021-11-11 | 2022-02-25 | 国网新疆电力有限公司电力科学研究院 | Improved aluminum casting air tightness detection device and detection method thereof |
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| CN104165734B (en) | 2017-02-01 |
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