CN107727331A - A kind of ball-valve valve rod air leakage test equipment - Google Patents
A kind of ball-valve valve rod air leakage test equipment Download PDFInfo
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- CN107727331A CN107727331A CN201711088364.XA CN201711088364A CN107727331A CN 107727331 A CN107727331 A CN 107727331A CN 201711088364 A CN201711088364 A CN 201711088364A CN 107727331 A CN107727331 A CN 107727331A
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 238000007789 sealing Methods 0.000 claims description 51
- 230000007717 exclusion Effects 0.000 claims description 13
- 238000005304 joining Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- -1 polyethylene Polymers 0.000 abstract description 4
- 229920000573 polyethylene Polymers 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 10
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating 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
- G01M3/28—Investigating 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
- G01M3/2876—Investigating 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of ball-valve valve rod air leakage test equipment, it is related to ball-valve valve rod testing field, the vertical rod of upper plate, connection upper plate and lower shoe including lower shoe, above lower shoe and the cylinder being upside down on upper plate, the piston rod of the cylinder is set through upper plate, the lower shoe is provided with lower sleeve gasket, upper sleeve gasket is fixed with piston rod on the downside of the upper plate, the upper sleeve gasket is located at directly over lower shoe.The present invention is in order to propose a kind of polyethylene ball valve valve rod air leakage test equipment that can be sealed to valve rod and can carry out segmented monitoring.
Description
Technical field
The present invention relates to ball-valve valve rod testing field, more particularly to a kind of polyethylene ball valve valve rod air leakage test to set
It is standby.
Background technology
In gas pipeline system, polyethylene ball valve plays the on-off action in pipe gas course of conveying, operating
Pipeline usually requires to control the fuel gas transmission in downstream by the switch of ball valve.Conveyed compared to water conservancy, during fuel gas transmission
The danger coefficient brought in the event of leakage is higher therefore corresponding also higher for the pipe valve quality requirement for fuel gas transmission,
Before pipe valve dispatches from the factory, will all pass through tight hermetic can test.It is between connecting wall due to the middle valve seat of polyethylene ball valve and both sides
Assembled, dismounted to be irreversible by way of welding, therefore, in order to prevent ball valve after welding is completed, because some zero
Part leaks, and causes whole ball valve to scrap, and some parts of ball valve can carry out air leakage test before assembling.
The valve rod of ball valve is usually to be completed by plastic material injection molding or extrusion molding, then by machining, valve rod
Seepage is caused because internal density is uneven sometimes, therefore is also required to by air-tight test.Valve rod refers to following special
Profit：Patent name is " a kind of ball-valve valve rod ", and Authorization Notice No. CN201434109Y, authorized announcement date is March 31 in 2010
Day, it includes valve ball fluctuation block, valve rod end face sealing ring, end face seal plane, valve rod cylindrical section, valve rod torsion section.Because of its shape
Shape is more irregular, and conventional test equipment is more difficult to be sealed to it, also more difficult to carry out air tightness test to it.
The content of the invention
The present invention in order to solve the above problems, propose it is a kind of valve rod can be sealed and segmented monitoring can be carried out gather
Ethene ball-valve valve rod air leakage test equipment.
To achieve these goals, the present invention uses following technical scheme：A kind of ball-valve valve rod air leakage test equipment,
Upper plate including lower shoe, above lower shoe, connection upper plate and lower shoe vertical rod and be upside down on upper plate
Cylinder, the piston rod of the cylinder sets through upper plate, and the lower shoe is provided with lower sleeve gasket, the upper plate downside
Piston rod on be fixed with upper sleeve gasket, the upper sleeve gasket is located at directly over lower shoe；
The lower sleeve gasket includes a lower sleeve, two support blocks and a sealing piston, is provided with the lower sleeve by upper
Pressurizing chamber, piston hole and the sliding rod hole being sequentially communicated under, described two support blocks are located at opposite sides in pressurizing chamber；It is described close
Envelope piston is from top to bottom divided into piston head and slide bar, and the piston head can slide up and down between pressurizing chamber and piston hole, piston
Spacer sleeve is provided with two piston head sealing rings on head, and two piston head sealing rings can be realized with piston hole inwall to be sealed；The cunning
Bar passes through sliding rod hole, and upper end is fixed with piston head, and lower end is fixed on lower shoe；Inlet channel is provided with the sealing piston,
Piston head side wall of the upper end outlet of the inlet channel between two piston head sealing rings, the lower inlet of inlet channel
Connected with external gas source；Some lower sleeve returning springs are provided between the lower sleeve and lower shoe；
Longitudinal direction is provided with the test chamber of column type inside the upper sleeve gasket, and the test chamber lower end is communicated to upper sleeve gasket lower surface,
The upper end of upper sleeve gasket and the piston rod of cylinder are fixed, and the end face of lower end is provided with an inner seal ring and an exterior seal ring,
The inner seal ring is located at the inner side of the exterior seal ring and both central axis overlap with the central axis of test chamber,
The exterior seal ring can be with the upper surface crush seal of lower sleeve；
The upper sleeve gasket is provided with the instrument connection through inside and outside wall.
Preferably, at least one exclusion seal circle is circumferentially with the inwall of the test chamber, positioned at exclusion seal circle
The upper sleeve gasket side wall of top and instrument connection is offered in the upper sleeve gasket side wall below exclusion seal circle, it is close when separating
When seal quantity is more than one, instrument connection is also offered in the upper sleeve gasket side wall between neighbouring two exclusion seal circles.
Preferably, described two support block structures are consistent, two are equipped with each support block and is from top to bottom run through
Cylindricality counter sink, the cylindricality counter sink include nuts portion spacing hole and bolt cylinder spacing hole, and the nuts portion is spacing
Diameter of the hole position in bolt cylinder spacing hole upside and nuts portion spacing hole is more than the diameter of bolt cylinder spacing hole, Mei Gezhu
A plug is equipped with shape counter sink and plays bolt, the plug plays bolt from top to bottom through corresponding cylindricality counter sink and lower end
Fixed with pressurizing chamber bottom surface；The cap portion that plug plays bolt is limited in nuts portion spacing hole, and the cylinder that plug plays bolt passes through bolt
Cylinder spacing hole, the support block can play bolt along corresponding two plugs and slide up and down；The bottom surface of the support block and pressurizing chamber
Bottom surface between be provided with support block returning spring.
Preferably, the joining place of the piston hole and pressurizing chamber is provided with fillet.
Preferably, the lower sleeve returning spring quantity is four, four lower sleeve returning springs surround sealing piston
The circumferentially equidistant interval setting of slide bar.
Therefore, the present invention has the advantages that：1st, upper sleeve gasket and lower sleeve gasket are provided with, can be by whole valve rod bag
Wrap and tested, test is more comprehensively；2nd, driven by cylinder, upper sleeve gasket and lower sleeve gasket automatically can carry out valve rod close
Envelope, the automatic test that carries out pneumatic compression, automaticity are high；3rd, exclusion seal circle is provided with test chamber, valve rod can be divided
Segmentation leakage monitoring, is easy to analyze the leakage reason of valve rod, and then carries out process modification.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the exploded view of the present invention.
Fig. 3 is the front view of the present invention.
Fig. 4 is the sectional view in A-A directions in Fig. 3.
Fig. 5 is the side view of the present invention.
Fig. 6 is the partial sectional view in B-B directions in Fig. 5.
Fig. 7 is the enlarged diagram at a in Fig. 6.
Fig. 8 is the enlarged diagram at b in Fig. 6.
Fig. 9 is the structure sectional view of lower sleeve in the present invention.
Figure 10 is the structural representation of sealing piston in the present invention.
Figure 11 is the structural representation of support block in the present invention.
Figure 12 is the structure sectional view of support block in the present invention.
Figure 13 is the structural representation of valve rod.
Figure 14 is the structural representation of another angle of valve rod.
Figure 15 is the overall structure diagram of test mode of the present invention.
Figure 16 is the partial sectional view that the present invention is put into valve rod.
Figure 17 is the present invention just by partial sectional view during valve stem seal.
Figure 18 is partial sectional view when present invention pressurization is tested.
Figure 19 is the enlarged diagram at c in Figure 18.
1：Upper plate；2：Lower shoe；3：Vertical rod；4：Cylinder；5：Upper sleeve gasket；501：Instrument connection；502：Test chamber；503：
Exterior seal ring；504：Inner seal ring；505：Exclusion seal circle；6：Lower sleeve gasket；601：Lower sleeve；602：Support block；603：It is close
Seal piston；604：Plug plays bolt；605：Support block returning spring；606：Lower sleeve returning spring；607：Pressurizing chamber；608：Piston
Hole；609：Sliding rod hole；610：Inlet channel；611：Piston head；612：Slide bar；613：Piston head sealing ring；614：Cylindricality countersunk head
Hole；615：Nuts portion spacing hole；616：Bolt cylinder spacing hole；7：Valve rod；701：Valve rod torsion section；702：Valve rod cylinder
Section；703：End face seal plane；704：Valve rod end face sealing ring；705：Valve ball fluctuates block.
Embodiment
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
A kind of ball-valve valve rod air leakage test equipment, as shown in Fig. 1 to Figure 19, including lower shoe 2, positioned at lower shoe 2
Two vertical rods 3 and inversion of the upper plate 1, connection upper plate 1 and lower shoe 2 of surface are fixed on the cylinder on upper plate 1
4, the upper plate 1 is be arranged in parallel with lower shoe 2, and cylinder body and the upper plate 1 of the cylinder 4 are fixed, the piston rod 401 of cylinder 4
Set through upper plate 1, the lower shoe 2 is provided with lower sleeve gasket 6, is fixed with the piston rod 401 of the downside of upper plate 1
Upper sleeve gasket 5, the upper sleeve gasket 5 are located at directly over lower shoe 2, and upper sleeve gasket 5 can be moved up and down simultaneously by the driving of cylinder 4
Realize and seal with lower sleeve gasket 6.
The lower sleeve gasket 6 includes 601, two support blocks 602 of a lower sleeve and a sealing piston 603, as Fig. 8,
Pressurizing chamber 607, piston hole 608 and the sliding rod hole 609 being from top to bottom sequentially communicated are provided with shown in Fig. 9, in the lower sleeve 601,
Described pressurizing chamber 607, piston hole 608 and sliding rod hole 609 all for cylinder and is coaxially disposed, and described two support blocks 602 are set
In opposite sides in pressurizing chamber 607, two structures of support block 602 are consistent, and the support block 602 is in rectangular-shape, and upper surface is
One smooth supporting surface, two cylindricality from top to bottom run through counter sinks 614 are equipped with each support block 602, such as Figure 11, figure
Shown in 12, the cylindricality counter sink 614 includes nuts portion spacing hole 615 and bolt cylinder spacing hole 616, the nuts portion
Spacing hole 615 is located at the upside of bolt cylinder spacing hole 616 and the diameter of nuts portion spacing hole 615 is more than bolt cylinder spacing hole
616 diameter, a plug is equipped with each cylindricality counter sink 614 and plays bolt 604, described fill in is played bolt 604 and worn from top to bottom
Cross corresponding cylindricality counter sink 614 and lower end is fixed with the bottom surface of pressurizing chamber 607；The cap portion that plug plays bolt 604 is limited in bolt
In cap portion spacing hole 615, the cylinder that plug plays bolt 604 passes through bolt cylinder spacing hole 616, and the support block 602 can be along correspondingly
Two plugs play bolt 604 and slide up and down；Support block is provided between the bottom surface of the support block 602 and the bottom surface of pressurizing chamber 607
Returning spring 605.After the upper surface of support block 602 is pressurized, support block 602 can play bolt 604 along plug and move down and extrude support block
Returning spring 605；After the upper table surface pressure of support block 602 is cancelled, support block 602 can the supported piece of reply masterpiece of returning spring 605
With rising to initial position.
The sealing piston 603 is from top to bottom divided into piston head 611 and slide bar 612, as shown in Figure 10, the piston head
611 can slide up and down between pressurizing chamber 607 and piston hole 608, and spacer sleeve is provided with two piston head sealing rings on piston head 611
613, two piston head sealing rings 613 are horizontally disposed and can realize sealing, the piston hole 608 with the inwall of piston hole 608
Fillet is provided with the joining place of pressurizing chamber 607, is easy to piston head 611 to switch slip between piston hole 608 and pressurizing chamber 607,
It is also beneficial to increase the service life of piston head sealing ring 613；The slide bar 612 passes through sliding rod hole 609, upper end and piston head
611 are fixed, and lower end is fixed on lower shoe 2；Inlet channel 610 is provided with the sealing piston 603, as shown in figure 8, it is described enter
Piston head 611 side wall of the upper end outlet of gas passage 610 between two piston head sealing rings 613, under inlet channel 610
End entrance connects with external gas source, is connected with test source of the gas in inlet channel 610 all the time；Between the lower sleeve 601 and lower shoe 2
Provided with four lower sleeve returning springs 606, four lower sleeve returning springs 606 are around circumference of slide bar 612 of sealing piston 603 etc.
Away from interval setting.The bottom surface of lower sleeve 601 is acted on by the restoring force of lower sleeve returning spring 606 all the time, when the upper table of lower sleeve 601
When pressure is not descended in face, the piston head 611 of the sealing piston 603 is located at two work in piston hole 608 and on piston head 611
Plugs seal circle 613 is realized with the inwall of piston hole 608 and sealed, and then inlet channel 610 is not connected with pressurizing chamber 607；When
When the upper surface of lower sleeve 601 is by lower pressure, lower sleeve 601 moves down extruding lower sleeve returning spring 606, meanwhile, the sealing
The piston head 611 of piston 603 can shift from piston hole 608 toward the direction of pressurizing chamber 607, when on piston head 611 positioned at upside
After piston head sealing ring 613 enters pressurizing chamber 607, inlet channel 610 is easy to connect with pressurizing chamber 607, and external gas source just can lead to
Inlet channel 610 is crossed toward with air pressure capable of being increased in pressurizing chamber 607.When being completed, the lower pressure of the upper surface of lower sleeve 601 is removed, and is trapped
601 lower surfaces of cylinder are acted on by the restoring force of lower sleeve returning spring 606 to be risen, meanwhile, the piston head of the sealing piston 603
611 can be back in piston hole 608 from pressurizing chamber 607, when the piston head sealing ring 613 positioned at upside on piston head 611 is back to
After piston hole 608, two piston head sealing rings 613 are realized with the inwall of piston hole 608 and sealed, inlet channel 610 and pressurizing chamber
607 disconnect connection, and external gas source just can not be by inlet channel 610 toward with air pressure capable of being increased in pressurizing chamber 607.
The inside of upper sleeve gasket 5 longitudinal direction is provided with the test chamber 502 of column type, as shown in fig. 7, the lower end of the test chamber 502
It is communicated to the lower surface of upper sleeve gasket 5, upper end sealing；The upper end of the upper sleeve gasket 5 is fixed with the piston rod 401 of cylinder 4, lower end
End face be provided with an inner seal ring 504 and an exterior seal ring 503, the inner seal ring 504 is located at the exterior seal ring
The central axis of 503 inner side and both central axis with test chamber 502 overlaps, and the exterior seal ring 503 can be with trapping
The upper surface crush seal of cylinder 601；The upper sleeve gasket 5 is provided with three instrument connections 501 through inside and outside wall, three instrument connections
501 are arranged at intervals from top to bottom, and two exclusion seal circles 505 are circumferentially with the inwall of the test chamber 502, and two cut-offs are close
Seal 505 is respectively arranged between two neighboring instrument connection 501.Three instrument connections 501 are sentenced by tracheae and air pressure change
Disconnected equipment is connected, and the air pressure change judges that equipment can be pressure sensor, is judged by monitoring pressure change；Can also be
Tank, by having seen whether that bubble spills judgement.
The valve rod 7 that the present invention tests, as shown in Figure 13, Figure 14, from top to bottom include valve rod torsion section 701, valve rod successively
Cylindrical section 702, end face seal plane 703, valve rod end face sealing ring 704 and valve ball fluctuation block 705, the valve rod torsion section
701st, valve rod cylindrical section 702, valve rod end face sealing ring 704 and valve ball fluctuation block 705 are coaxially disposed, and the end face seal is put down
Face 703 is located on valve rod end face sealing ring 704 towards the end face of the side of valve rod cylindrical section 702, the side of the valve ball fluctuation block 705
Opposite sides is provided with symmetrical cutting face on wall.
When being tested, as shown in FIG. 15 to 18, the two valve ball fluctuation block 705 of valve rod 7 is inserted in lower sleeve gasket 6
Between individual support block 602, two cutting faces of valve ball fluctuation block 705 are respectively facing two support blocks 602, valve ball fluctuation block 705
Cutting face and corresponding support block 602 between spacing-controllable system within 2 millimeters, be easy to valve rod 7 that positioning is preferably installed.Valve
It is supported on rod end surface sealing ring 704 towards the end face of valve ball fluctuation block 705 side in two support blocks 602, now, valve rod 7
Installation positioning finishes, as shown in figure 16.Because the axial width of valve rod end face sealing ring 704 has ± 1 millimeter of mismachining tolerance,
Therefore, when being set for the height of the upper surface of lower sleeve 601 and the upper surface of support block 602, could be arranged to：Support block 602
The height of upper surface is higher than the height of the upper surface of lower sleeve 601 plus the axial width of standard size valve rod end face sealing ring 704
Go out 2 millimeters.So that after valve rod 7 installs, the end face seal plane 703 of valve rod 7 can be higher than the upper end of lower sleeve 601 all the time
Face, the height being higher by can be eliminated by extruding support block returning spring 605.Start to test, start cylinder 4, the piston rod of cylinder 4
401, which decline drive upper sleeve gasket 5, declines, and upper sleeve gasket 5 moves down toward the direction of lower sleeve gasket 6, and the upper end of valve rod 7 is introduced into upper sleeve gasket
5 test chamber 502, valve rod 7 enter during test chamber 502, the energy of two exclusion seal circles 505 and valve of the inwall of test chamber 502
The outer wall gluing, sealing of valve rod cylindrical section 702 of bar 7.Then, the inner seal ring 504 on the lower end surface of upper sleeve gasket 5 and valve rod 7
End face seal plane 703 is contacted and sealed.Upper sleeve gasket 5 continues to move down, the end face seal plane 703 of valve rod 7 by lower pressure,
Two upper surfaces of support block 602 are pressurized indirectly, and support block 602 plays bolt 604 along plug and moves down and extrude support block returning spring
605, until the exterior seal ring 503 on the lower end surface of upper sleeve gasket 5 contacts sealing with the upper surface of lower sleeve 601, such as Figure 17 institutes
Show.
Now, exterior seal ring 503 will seal between upper sleeve gasket 5 and lower sleeve 601 so that valve rod 7 is in one
In sealing cavity, as shown in figure 15；Meanwhile end face seal plane 703 of the inner seal ring 504 again with valve rod 7 seals, by valve rod 7
Two cavitys are isolated in, the lower end of valve rod 7 is located in pressurizing chamber 607, and the upper end of valve rod 7 is located in test chamber 502.
The piston rod 401 of cylinder 4 continues to decline, and upper sleeve gasket 5 drives lower sleeve 601 to move down together, and lower sleeve 601 moves down
Lower sleeve returning spring 606 is extruded, meanwhile, the piston head 611 of the sealing piston 603 is from piston hole 608 toward the side of pressurizing chamber 607
To transfer, after the piston head sealing ring 613 positioned at upside on piston head 611 enters pressurizing chamber 607, inlet channel 610 is just
Connected in pressurizing chamber 607, external gas source by inlet channel 610 toward with air pressure capable of being increased in pressurizing chamber 607, will in pressurizing chamber 607
It is connected with measuring air pressure.Now, seepage be present if as Density inhomogeneity inside valve rod 7, measuring air pressure will be out of valve rod 7
The test chamber 502 that portion is leaked out to where the upper end of valve rod 7, air pressure will raise in test chamber 502, and air pressure change judges that equipment just can
Judged by instrument connection 501, also, two exclusion seal circles 505 are again by the valve rod section cut-off point in test chamber 502
It is interposed between in three seal cavities, instrument connection 501 is designed with each annular seal space cavity.If there is leakage, by judge be from
Which instrument connection 501 leaks out, and just can judge which section of valve rod 7 has quality problems, changes for the technique of later valve rod manufacture
Enter with preferable reference value.
After being completed, the piston rod 401 of cylinder 4 gos up, and upper sleeve gasket 5 moves up, the lower pressure of the upper surface of lower sleeve 601
To remove, the lower surface of lower sleeve 601 is acted on by the restoring force of lower sleeve returning spring 606 to be risen, meanwhile, the sealing piston 603
Piston head 611 can be back to from pressurizing chamber 607 in piston hole 608, when the piston head sealing ring positioned at upside on piston head 611
After 613 are back to piston hole 608, two piston head sealing rings 613 with the inwall of piston hole 608 realize seal, inlet channel 610 with
Pressurizing chamber 607 disconnects connection, and external gas source just can not be by inlet channel 610 again toward with air pressure capable of being increased in pressurizing chamber 607.Upper sleeve gasket
5 continue to move up, and depart from successively with the upper surface of lower sleeve 601, depart from the end face seal plane 703 of valve rod 7, finally with entirely
Valve rod 7 departs from, and two support blocks 602 return to elemental height as support block returning spring 605 acts on.So far, a valve
The testing process of bar 7 terminates, and operating personnel only need to take out the valve rod 7 being completed out of lower sleeve gasket 6, be put into next treat
Side valve bar 7, start cylinder 4, you can carry out the testing process of next round, circulated with this.
Claims (5)
1. a kind of ball-valve valve rod air leakage test equipment, including lower shoe（2）, positioned at lower shoe（2）The upper plate of top
（1）, connection upper plate（1）With lower shoe（2）Vertical rod（3）And it is upside down in upper plate（1）On cylinder（4）, the cylinder
（4）Piston rod（401）Through upper plate（1）Set, it is characterised in that：The lower shoe（2）It is provided with lower sleeve gasket（6）,
The upper plate（1）The piston rod of downside（401）On be fixed with upper sleeve gasket（5）, the upper sleeve gasket（5）Positioned at lower shoe
（2）Surface；
The lower sleeve gasket（6）Including a lower sleeve（601）, two support blocks（602）An and sealing piston（603）, institute
State lower sleeve（601）It is interior provided with the pressurizing chamber being from top to bottom sequentially communicated（607）, piston hole（608）And sliding rod hole（609）, institute
State two support blocks（602）Positioned at pressurizing chamber（607）Interior opposite sides；The sealing piston（603）From top to bottom it is divided into piston
Head（611）With slide bar（612）, the piston head（611）Can be in pressurizing chamber（607）With piston hole（608）Between slide up and down, it is living
Chock plug（611）Upper spacer sleeve is provided with two piston head sealing rings（613）, two piston head sealing rings（613）Can be with piston hole
（608）Inwall realizes sealing；The slide bar（612）Through sliding rod hole（609）, upper end and piston head（611）Fixed, lower end is fixed
In lower shoe（2）On；The sealing piston（603）It is interior to be provided with inlet channel（610）, the inlet channel（610）On bring out
Mouth is located at two piston head sealing rings（613）Between piston head（611）Side wall, inlet channel（610）Lower inlet with it is outer
Connect source of the gas connection；The lower sleeve（601）With lower shoe（2）Between be provided with some lower sleeve returning springs（606）；
The upper sleeve gasket（5）Internal longitudinal direction is provided with the test chamber of column type（502）, the test chamber（502）Lower end is communicated to
Sealing shroud（5）Lower surface, upper sleeve gasket（5）Upper end and cylinder（4）Piston rod（401）Fixed, the end face of lower end is provided with
One inner seal ring（504）With an exterior seal ring（503）, the inner seal ring（504）Positioned at the exterior seal ring（503）'s
Inner side and both central axis are and test chamber（502）Central axis overlap, the exterior seal ring（503）Energy and lower sleeve
（601）Upper surface crush seal；
The upper sleeve gasket（5）It is provided with the instrument connection through inside and outside wall（501）.
A kind of 2. ball-valve valve rod air leakage test equipment according to claim 1, it is characterised in that：The test chamber
（502）Inwall on be circumferentially with least one exclusion seal circle（505）, positioned at exclusion seal circle（505）The upper sealing of top
Set（5）Side wall and positioned at exclusion seal circle（505）The upper sleeve gasket of lower section（5）Instrument connection is offered in side wall（501）, when every
Disconnected sealing ring（505）When quantity is more than one, neighbouring two exclusion seal circles（505）Between upper sleeve gasket（5）Side wall
On also offer instrument connection（501）.
A kind of 3. ball-valve valve rod air leakage test equipment according to claim 1, it is characterised in that：Described two supports
Block（602）Structure is consistent, each support block（602）Inside it is equipped with two cylindricality from top to bottom run through counter sinks（614）, it is described
Cylindricality counter sink（614）Including nuts portion spacing hole（615）With bolt cylinder spacing hole（616）, the nuts portion is spacing
Hole（615）Positioned at bolt cylinder spacing hole（616）Upside and nuts portion spacing hole（615）Diameter be more than bolt cylinder it is spacing
Hole（616）Diameter, each cylindricality counter sink（614）Inside it is equipped with a plug and plays bolt（604）, the plug plays bolt（604）
From top to bottom through corresponding cylindricality counter sink（614）And lower end and pressurizing chamber（607）Bottom surface is fixed；Plug plays bolt（604）
Cap portion be limited in nuts portion spacing hole（615）Interior, plug plays bolt（604）Cylinder pass through bolt cylinder spacing hole（616）,
The support block（602）Bolt can be played along corresponding two plugs（604）Slide up and down；The support block（602）Bottom surface with plus
Press chamber（607）Bottom surface between be provided with support block returning spring（605）.
A kind of 4. ball-valve valve rod air leakage test equipment according to claim 1 or 2 or 3, it is characterised in that：The work
Consent（608）With pressurizing chamber（607）Joining place be provided with fillet.
A kind of 5. ball-valve valve rod air leakage test equipment according to claim 1, it is characterised in that：The lower sleeve returns
Multiple spring（606）Quantity is four, four lower sleeve returning springs（606）Around sealing piston（603）Slide bar（612）It is circumferential
Equi-spaced apart is set.
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| CN201711088364.XA CN107727331B (en) | 2017-11-08 | 2017-11-08 | Ball valve rod airtight performance test equipment |
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| CN201711088364.XA CN107727331B (en) | 2017-11-08 | 2017-11-08 | Ball valve rod airtight performance test equipment |
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| CN107727331A true CN107727331A (en) | 2018-02-23 |
| CN107727331B CN107727331B (en) | 2023-11-24 |
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| CN108507733A (en) * | 2018-07-09 | 2018-09-07 | 陈永杰 | A kind of leak test plant of natural gas ball valve |
| CN108507728A (en) * | 2018-06-05 | 2018-09-07 | 陕西博菲特流体控制装备制造有限公司 | A kind of modular heat trace integrated station suppresses test device |
| CN108844696A (en) * | 2018-07-09 | 2018-11-20 | 陈永杰 | A kind of gas tubular detection device |
| CN109470429A (en) * | 2018-11-29 | 2019-03-15 | 秦飞 | A kind of PE ball valve detection device |
| CN109612640A (en) * | 2018-12-10 | 2019-04-12 | 美钻深海能源科技研发（上海）有限公司 | A kind of valve stem seal test method |
| CN109682554A (en) * | 2019-01-14 | 2019-04-26 | 中国计量大学 | A kind of PE ball-valve valve rod tightness test device and its detection method |
| CN112213035A (en) * | 2020-09-07 | 2021-01-12 | 华帝股份有限公司 | Air tightness detection system, detection method and special clamp |
| CN113639067A (en) * | 2021-07-08 | 2021-11-12 | 宁波率先减压阀有限公司 | Two-way valve for testing air tightness based on differential pressure sensor |
| CN116659778A (en) * | 2023-08-02 | 2023-08-29 | 四川宏大安全技术服务有限公司 | Plug valve pressure test device and pressure test method thereof |
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| CN109470429A (en) * | 2018-11-29 | 2019-03-15 | 秦飞 | A kind of PE ball valve detection device |
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| CN109682554A (en) * | 2019-01-14 | 2019-04-26 | 中国计量大学 | A kind of PE ball-valve valve rod tightness test device and its detection method |
| CN112213035A (en) * | 2020-09-07 | 2021-01-12 | 华帝股份有限公司 | Air tightness detection system, detection method and special clamp |
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| CN113639067A (en) * | 2021-07-08 | 2021-11-12 | 宁波率先减压阀有限公司 | Two-way valve for testing air tightness based on differential pressure sensor |
| CN116659778A (en) * | 2023-08-02 | 2023-08-29 | 四川宏大安全技术服务有限公司 | Plug valve pressure test device and pressure test method thereof |
| CN116659778B (en) * | 2023-08-02 | 2023-11-10 | 四川宏大安全技术服务有限公司 | Plug valve pressure test device and pressure test method thereof |
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Address after: 315414 No. 71, West Road, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Applicant after: Ningbo Yuhua Industrial Co.,Ltd. Address before: 315414 No. 71, West Road, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Applicant before: NINGBO YUHUA ELECTRIC APPLIANCE Co.,Ltd. |
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