CN204043867U - The end cap of sealing property of ball valves test - Google Patents
The end cap of sealing property of ball valves test Download PDFInfo
- Publication number
- CN204043867U CN204043867U CN201420372568.1U CN201420372568U CN204043867U CN 204043867 U CN204043867 U CN 204043867U CN 201420372568 U CN201420372568 U CN 201420372568U CN 204043867 U CN204043867 U CN 204043867U
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- end cap
- side end
- front side
- rear side
- axis
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- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 title claims abstract description 38
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000011148 porous material Substances 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 5
- 241000283216 Phocidae Species 0.000 description 13
- 238000003825 pressing Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003292 diminished effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model relates to the end cap of a kind of sealing property of ball valves test.During the test of prior art ball valve, adopt external device (ED) to be clamped in ball valve two ends and form sealing, during external device (ED) clamping ball valve, easily make ball valve be out of shape and impact detects.The end cap that the utility model provides a kind of sealing property of ball valves to test, comprise front side end cap and rear side end cap, front side end cap comprises pedestal and the axis of guide, rear side end cap is sleeved on the axis of guide, it is characterized in that: also comprise O-ring seal, returning spring and spacing ring, returning spring to be sleeved on the axis of guide and between rear side end cap and the pedestal of front side end cap, spacing ring is arranged on the axis of guide, the pedestal of front side end cap is provided with the first annular slope, rear side end covers and is provided with the second annular slope, forms mounting groove between the first annular slope and the second annular slope.The utility model reasonable in design, structure is simple, and simple to operation, cost is low, good sealing effect, effectively can reduce erroneous judgement.
Description
Technical field
The utility model relates to the end cap of a kind of sealing property of ball valves test, for testing the sealing of ball valve.
Background technology
Ball valve makes opening and closing element with the spheroid of band manhole, and spheroid rotates with valve rod, to realize the valve of switching motion.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, requires that experiments of sealing performance is carried out in pressurization before therefore using.When prior art is tested ball valve, usual employing sealing gasket or O-ring seal are 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, thus sealing gasket or O-ring seal and ball valve two ends are formed seal, 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, frame has base plate, the center of base plate has pore, lifting jack is connected with frame and pressing plate respectively, lifting jack controls pressing plate and moves up and down, during test, ball valve is contained between pressing plate and base plate, and by lifting jack, pressing plate is pressed down, thus makes ball valve be 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 is complicated, its frame heavier-weight, need be immersed in the water frame by external unit, and the installation of ball valve also comparatively bothers; 2, when operation lifting jack presses down pressing plate, the more difficult control of its dynamics, presses down inadequate words, the sealing of pressing plate and ball valve end may be made not firm, thus the accuracy of impact test, bring qualitative erroneous judgement, press down excessive, ball valve can be made to deform, cause the out-of-flatness of ball valve end face, thus make cannot form sealing between ball valve and pressing plate, bring qualitative erroneous judgement, in addition, press down excessive words, also directly can damage ball valve, cause damage.
Authorization Notice No. CN 202547894 U, in the Chinese patent of authorized announcement date 2012.11.21, disclose a kind of valve air tightness detection system, it comprises frames, described frames installs the clamping device clamping measured piece, described clamping device is arranged on working plate, described clamping device simulates detecting unit with inflation be connected, 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, on the lift drive mechanism that described frock clamp is arranged on to drive frock clamp to move 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 having range estimation (bubble) method and inflation simulation (pressure change) method concurrently, can not only the impermeability quality of testing product fast whether qualified, also convenient operation personnel detect and mark the leak source of 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; Have certain error unavoidably between valve, thus the compression cylinder of this system may damage some valve by pressure, causes damage; Owing to there is error between valve, this system is difficult to valve is by the gross sealed all completely, brings qualitative erroneous judgement.
Utility model content
The purpose of this utility model is to overcome above shortcomings in prior art, and provides a kind of reasonable in design, and structure is simple, and simple to operation, cost is low, good sealing effect, effectively can reduce the end cap of the sealing property of ball valves test of erroneous judgement.
The technical scheme in the invention for solving the above technical problem is: 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 are coaxially arranged, described its axial direction of front side end cover rim has pore, described front side end cap comprises pedestal and to be arranged on pedestal and the axis of guide coaxially arranged with pedestal, described rear side end cap is slidably sleeved on the axis of guide, it is characterized in that: also comprise O-ring seal, the returning spring that is separated is kept in its natural state and for regulating the spacing ring of spacing between rear side end cap and pedestal for making rear side end cap and pedestal, described returning spring to be 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 first annular slope of axis in gathering shape along front side end cap, described rear side end covers second annular slope of axis in gathering shape be provided with along rear side end cap, formed between described first annular slope and the second annular slope for installing O-ring seal and ringwise mounting groove.The utility model structure is simple, and reasonable in design, simple to operate, the sealing between end cap and ball valve is reliable, during 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, thus in ball valve, form the enclosed environment with pressure, because end cap adopts interpolation type, without the need to external agency, ball valve two ends are clamped, thus do not have the impermeability that external force affects ball valve, the specific implementation of self sealss is: when end cap inserts ball valve one end, pressurizeed in ball valve by pore, make, between front side end cap and ball valve, there is internal pressure, utilize this internal pressure to the effect of front side end cap, front side end cap is moved in side end cap direction backward, then side end cap is owing to keeping motionless by outside delivery device spacing backstop, the first annular slope is finally made to move toward the second annular slope and promote O-ring seal, O-ring seal is extended out, and then make O-ring seal fully contact with ball valve inwall and extrude, formed and close, thus ensure the sealing between end cap and ball valve, due to the setting of returning spring, when shedding the air pressure in ball valve, front side end cap and O-ring seal successively reset, and end cap entirety can be extracted out smoothly from ball valve.
Form conical section between first annular slope described in the utility model and pedestal, the bottom of described rear side end cap has the cavity for this conical section of accommodating part.Front side end cap can be inserted partially in the cavity of rear side end cap, thus increase front side end cap side end cap movement backward stroke, the amount that O-ring seal is extended out increases, and ensures be formed between O-ring seal and ball valve inwall to seal.
Front side described in the utility model end cap, form cavity between rear side end cap and O-ring seal, described rear side end covers and has some pressure stable holes for keeping the air pressure in cavity and external pressure to balance, and described pressure stable hole is communicated with cavity.Pressure stable hole can make the air pressure in cavity and external pressure balance, and prevents cavity due to O-ring seal respectively with front side end cap and rear side end cap seal and after forming enclosure space, front side end cap cannot move by opposite posterior end cap.
Pore described in the utility model is positioned at the center of front side end cap.When pore is positioned at center, when making external pressurized, ball valve internal pressure can be made balanced, prevent front side end cap from tilting and cannot move.
Angle between first annular slope described in the utility model and the axis of front side end cap is equal with the angle between the second annular slope and the axis of front side end cap.Can prevent O-ring seal from twisting, and O-ring seal and ball valve contact internal walls inequality may be caused, cause gas leakage, thus affect accuracy of detection.
The utility model also comprises gas-tpe fitting, and described gas-tpe fitting to be arranged on the axis of guide and to be communicated with pore.Arranging of gas-tpe fitting is conveniently connected with external air source.
The end face of rear side end cap described in the utility model is 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 utility model compared with prior art, has the following advantages and effect: structure is simple, and reasonable in design, simple to operate, the sealing between end cap and ball valve is reliable, during 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, thus in ball valve, form the enclosed environment with pressure, because end cap adopts interpolation type, without the need to external agency, ball valve two ends are clamped, thus do not have the impermeability that external force affects ball valve, the specific implementation of self sealss is: when end cap inserts ball valve one end, pressurizeed in ball valve by pore, make, between front side end cap and ball valve, there is internal pressure, utilize this internal pressure to the effect of front side end cap, front side end cap is moved in side end cap direction backward, then side end cap is owing to keeping motionless by outside delivery device spacing backstop, the first annular slope is finally made to move toward the second annular slope and promote O-ring seal, O-ring seal is extended out, and then make O-ring seal fully contact with ball valve inwall and extrude, formed and close, thus ensure the sealing between end cap and ball valve, due to the setting of returning spring, when shedding the air pressure in ball valve, front side end cap and O-ring seal successively reset, and end cap entirety can be extracted out smoothly from ball valve.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the end cap of sealing property of ball valves test in the utility model embodiment.
Fig. 2 is the structural representation of end cap when coordinating with 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 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, first annular slope 14, conical section 15, guiding surface 16, through hole 21, 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, also by embodiment, the utility model is described in further detail, and following examples are that the utility model is not limited to following examples to explanation of the present utility model.
Embodiment 1.
See 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 are coaxially arranged, front side end cap 1 has pore 11 along on its axial direction, front side end cap 1 comprises pedestal 12 and to be arranged on pedestal 12 and the axis of guide 13 that arrange coaxial with pedestal 12, pedestal 12 and the axis of guide 13 are integral type structure, rear side end cap 2 has through hole 21, rear side end cap 2 is slidably sleeved on the axis of guide 13 by its through hole 21, the distance thus between adjustable rear side end cap 2 and the pedestal 12 of front side end cap 1.
Returning spring 4 in the present embodiment keeps being separated with pedestal 12 for making rear side end cap 2 in its natural state, returning spring 4 to be 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 first annular slope 14 of axis in gathering shape along front side end cap 1, rear side end cap 2 is provided with second annular slope 22 of axis in gathering shape along rear side end cap 2, formed for installing O-ring seal 3 and ringwise mounting groove 31 between described first annular slope 14 and the second annular slope 22, spacing ring 5 regulate rear side end cap 2 and pedestal 12 between spacing time, initial distance between adjustable first annular slope 14 and the second annular slope 22, makes O-ring seal 3 adapt to the ball valve of model slightly difference with this.
During use, outside delivery device and rear side end cap 2 are fixed, end cap entirety is inserted in ball valve by outside delivery device, by pore 11 toward pressure testing in ball valve, the self sealss of end cap are utilized to make to form sealing between end cap and the inwall of ball valve, and in ball valve, form the enclosed environment with pressure, now just ball valve can be placed in water, the impermeability of ball valve is detected 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 during convenient test next time, end cap is inserted ball valve, thus the air-leakage test just completed ball valve.When ball valve intermediate switch is closed condition, ball valve one end arranges the monolateral sealing that end cap can test this end, all arranges end cap without the need to 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: when end cap inserts ball valve one end, by pressurizeing in pore 11 pairs of ball valves, make, between front side end cap 1 and ball valve, there is internal pressure, utilize this internal pressure to the effect of front side end cap 1, front side end cap 1 is moved in side end cap 2 direction backward, then side end cap 2 is owing to keeping motionless by outside delivery device spacing backstop, the first annular slope 14 is finally made to move toward the second annular slope 22, mounting groove 31 is diminished gradually, the mounting groove 31 diminished gradually will make O-ring seal 3 to the radial compression of end cap, O-ring seal 3 is extended out, and then make O-ring seal 3 fully contact with ball valve inwall and extrude, formed and close, thus ensure the sealing between end cap and ball valve.Adopt this principle of self sealss, simply, fast and effectively can form sealing in ball valve, just directly air-leakage test can be carried out to ball valve, without the need to external agency, the clamping of ball valve two ends is sealed, thus the impermeability that external force affects ball valve is not had, its accuracy of detection is higher, to the not damaged of ball valve own.
Conical section 15 is formed between the first annular slope 14 in the present embodiment and pedestal 12, the bottom of rear side end cap 2 has the cavity 23 for this conical section 15 of accommodating part, thus front side end cap 1 can be inserted partially in the cavity 23 of rear side end cap 2, thus increase front side end cap 1 side end cap 2 movement backward stroke, the amount that O-ring seal 3 is extended out increases, and ensures be formed between O-ring seal 3 and ball valve inwall to seal.
Front side end cap 1 in the present embodiment, between rear side end cap 2 and O-ring seal 3, form cavity 32, rear side end cap 2 has some pressure stable holes 24 for keeping the air pressure in cavity 32 and external pressure to balance, pressure stable hole 24 is communicated with cavity 32, pressure stable hole 24 can make the air pressure in cavity 32 and external pressure balance, prevent cavity 32 due to after O-ring seal 3 seals with front side end cap 1 and rear side end cap 2 and form enclosure space respectively, front side end cap 1 cannot move by opposite posterior 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, when making external pressurized, ball valve internal pressure can be made balanced, prevent front side end cap 1 from tilting and cannot move, if the position of pore 11 is not or not the center of front side end cap 1, when pressurizeing in ball valve, front side end cap 1 causes inclination due to unbalance stress, affects it and moves.
The first annular slope 14 in the present embodiment is equal with the angle b between the second annular slope 22 and front side end cap 1 axis with the angle a between front side end cap 1 axis, first annular slope 14 move and mounting groove 31 is reduced thus outwards crush seal circle 3 time, O-ring seal 3 is subject to the power of the first annular slope 14 and the second annular slope 22, the stressed comparatively balanced of O-ring seal 3 both sides can be made, can prevent O-ring seal 3 from twisting, if the angle a between the first annular slope 14 and front side end cap 1 axis and the angle b between the second annular slope 22 and front side end cap 1 axis is unequal, first annular slope 14 move and mounting groove 31 is reduced thus outwards crush seal circle 3 time, the discontinuity equalization of O-ring seal 3 both sides may be caused, O-ring seal 3 is caused to twist, thus make O-ring seal 3 uneven with ball valve contact internal walls, 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, first annular slope 14 along front side end cap 1 axially side end cap 2 direction is moved 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, thus extrudes to be formed and seal with ball valve contact internal walls.
Gas-tpe fitting 6 in the present embodiment to be arranged on the axis of guide 13 and to be communicated with pore 11, and arranging of gas-tpe fitting 6 is conveniently connected with external air source.
The end face of the rear side end cap 2 in the present embodiment is 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 ball valve and insert in ball valve.
Above content described in this instructions is only to the explanation of the utility model example.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment; only otherwise depart from the content of the utility model instructions or surmount this scope as defined in the claims, protection domain of the present utility model all should be belonged to.
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 are coaxially arranged, described its axial direction of front side end cover rim has pore, described front side end cap comprises pedestal and to be arranged on pedestal and the axis of guide coaxially arranged with pedestal, described rear side end cap is slidably sleeved on the axis of guide, it is characterized in that: also comprise O-ring seal, the returning spring that is separated is kept in its natural state and for regulating the spacing ring of spacing between rear side end cap and pedestal for making rear side end cap and pedestal, described returning spring to be 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 first annular slope of axis in gathering shape along front side end cap, described rear side end covers second annular slope of axis in gathering shape be provided with along rear side end cap, formed between described first annular slope and the second annular slope for installing O-ring seal and ringwise mounting groove.
2. the end cap of sealing property of ball valves test according to claim 1, it is characterized in that: form conical section between described first annular slope and pedestal, the bottom of described rear side end cap has the cavity for this conical section of accommodating part.
3. the end cap of sealing property of ball valves test according to claim 1, it is characterized in that: described front side end cap, between rear side end cap and O-ring seal, form cavity, described rear side end covers and has some pressure stable holes for keeping the air pressure in cavity and external pressure to 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. the end cap of the sealing property of ball valves test according to claim 1 or 2 or 3 or 4, is characterized in that: the angle between described first annular slope and the axis of front side end cap is equal with the angle between the second annular slope and the axis of front side end cap.
6. the end cap of the sealing property of ball valves test according to claim 1 or 2 or 3 or 4, it is characterized in that: also comprise gas-tpe fitting, described gas-tpe fitting to be arranged on the axis of guide and to be communicated with pore.
7. the end cap of the sealing property of ball valves test according to claim 1 or 2 or 3 or 4, is characterized in that: the end face of described rear side end cap is provided with the connecting portion for being connected with outside delivery device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420372568.1U CN204043867U (en) | 2014-07-08 | 2014-07-08 | The end cap of sealing property of ball valves test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420372568.1U CN204043867U (en) | 2014-07-08 | 2014-07-08 | The end cap of sealing property of ball valves test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204043867U true CN204043867U (en) | 2014-12-24 |
Family
ID=52244519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420372568.1U Expired - Lifetime CN204043867U (en) | 2014-07-08 | 2014-07-08 | The end cap of sealing property of ball valves test |
Country Status (1)
| Country | Link |
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| CN (1) | CN204043867U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165734A (en) * | 2014-07-08 | 2014-11-26 | 宁波市宇华电器有限公司 | End cover for testing sealing performance of ball valve |
| 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 |
| CN105043675A (en) * | 2015-09-11 | 2015-11-11 | 王国良 | Ball valve gas tightness test apparatus |
| CN105136410A (en) * | 2015-09-11 | 2015-12-09 | 王国良 | Valve internal air tightness pre-detection device |
| CN105181273A (en) * | 2015-09-11 | 2015-12-23 | 王国良 | Ball valve detection equipment |
| CN105181274A (en) * | 2015-09-11 | 2015-12-23 | 王国良 | Ball valve sealing test machine |
-
2014
- 2014-07-08 CN CN201420372568.1U patent/CN204043867U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165734A (en) * | 2014-07-08 | 2014-11-26 | 宁波市宇华电器有限公司 | End cover for testing sealing performance of ball valve |
| CN104165734B (en) * | 2014-07-08 | 2017-02-01 | 宁波市宇华电器有限公司 | End cover for testing sealing performance of ball valve |
| 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 |
| CN105043675A (en) * | 2015-09-11 | 2015-11-11 | 王国良 | Ball valve gas tightness test apparatus |
| CN105136410A (en) * | 2015-09-11 | 2015-12-09 | 王国良 | Valve internal air tightness pre-detection device |
| CN105181273A (en) * | 2015-09-11 | 2015-12-23 | 王国良 | Ball valve detection equipment |
| CN105181274A (en) * | 2015-09-11 | 2015-12-23 | 王国良 | Ball valve sealing test machine |
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