A kind of valve end sealing mechanism
The present invention relates to ball valve air tightness test machine field, more particularly to a kind of valve end sealing mechanism.
Ball valve is to make opening and closing element with the spheroid with manhole, and spheroid is rotated with valve rod, to realize the valve of switching motion.
Ball valve is mainly used as cut-out, distribution and the flow direction for changing medium.
Industrial polythene PE ball valve is the important control unit of PE pipe networks, therefore is required using preceding using compressed gas as medium
Carry out experiments of sealing performance.When prior art is tested ball valve, the outer of ball valve two ends is generally placed in using sealing gasket or sealing ring
Portion, while ball valve two ends are clamped in force application apparatus such as cylinder or jack, so that sealing gasket or sealing ring and ball valve two
End forms sealing, and the ball valve after whole sealing is immersed in the water, then examines its sealing toward compressed gas is passed through inside ball valve
Above-mentioned test method has the disadvantages that：1st, operating process is complicated, and its frame heavier-weight need to be by external equipment
Frame is immersed in the water, and the installation of ball valve is also more bothered；2nd, pressing plate is pushed so as to close to ball valve progress using jack
Envelope and sealing ring are placed in outside ball valve two ends, and when being sealed with cylinder clamping at ball valve two ends, the dynamics of both is all
It is more difficult to control, if the power that pushes or clamps is inadequate, pressing plate and the sealing of ball valve end may be made not firm, so as to influence to try
The accuracy tested, brings the erroneous judgement in quality, if the power for pushing or clamping is excessive, ball valve can be made to deform, cause ball valve
End face out-of-flatness, so that can not form sealing between ball valve and pressing plate, brings the erroneous judgement in quality, in addition, pushing or pressing from both sides
If tight power is excessive, ball valve also can be directly damaged.
The content of the invention
The present invention proposes to solve the problem of current ball valve clamping is inconvenient, ball valve is easily deformed influence measuring accuracy
A kind of ball valve end face does not stress, will not make the clamped deformation of ball valve and the valve end sealing mechanism with automatic stopping function.
To achieve these goals, the present invention uses following technical scheme：A kind of valve end sealing mechanism, including end cap
Module, end cap locating module and drive module, the end that described end cap module includes end cover body, fixed with end cover body afterbody
Lid location-plate, be set in the extruding sleeve that can be slided in end cover body along end cover body, be set in end cover body and with extruding
The sleeve location-plate of sleeve afterbody fixation and the stopping mechanism being arranged in end cover body；Also it is arranged in described end cover body
There is sealing ring, end cover body front end side wall is provided with the spacing preiection of sealing ring, and sealing ring is spacing in spacing preiection and extruded sleeve
Between cylinder front end；Through end cover body and end cap location-plate provided with least one test stomata；Described stopping mechanism includes one
Piston cunning is offered on individual retreat stop block, a contiguous block, a piston and a returning spring, described end cover body front end face
Road, described piston is slidably disposed in piston slideway；The accommodating of retreat stop block is offered on described end cover body side wall
Being offered on groove, described extruding sleeve allows the perforate that passes through of retreat stop block, above and below described retreat stop block can be made in storage tank
Move, and the storage tank of retreat stop block is connected with the piston slideway of piston；Provided with two fixed pulleys inside described retreat stop block；It is described
Contiguous block one end be connected with piston, the other end is in the knee to end cap central axis bending, and described knee can stretch into retaining
Between two fixed pulleys of block, driving retreat stop block moves up and down；One is also arranged with described contiguous block to return for piston
Multiple returning spring；Described end cap locating module includes end cap installing plate and drive connection block, the end cap of the end cap module
Location-plate is fixed on end cap installing plate, and described drive connection block runs through end cap installing plate and end cap module by some connecting rods
The connection of sleeve location-plate, can the reach of drive sleeve location-plate, be connected with drive module on rear side of described drive connection block.
Preferably, described spacing preiection is identical provided with gradient with the face that extruding barrel forward end is spacing for sealing ring
Preferably, described end cap location-plate is in " work " font, surface both sides are provided with convex after described sleeve location-plate
Block, projection is fastened in the breach of end cap location-plate both sides, and described connecting rod is connected with projection.
Preferably, being respectively provided with a bolt positioning hole on described four angles of end cap location-plate.
Preferably, described end cover body is provided with two stopping mechanisms, two stopping mechanisms are along end cap central axis
It is symmetrical arranged.
Preferably, described drive module is cylinder, the cylinder axis of cylinder are connected with drive connection block.
Therefore, the present invention has the advantages that：1st, using the interior end cover designs for stretching formula, ball valve end face does not stress, carried
High measuring accuracy；2nd, will not be convenient to insert with wall friction in ball valve when stretching mobile in end cap using extruding expansion sealing ring sealing
Pull out；3rd, provided with stopping mechanism, prevent measuring air pressure excessive, end cap is retreated, influence measuring accuracy.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of end cap module of the present invention.
Fig. 3 is the structural representation of another angle of end cap module of the present invention.
Fig. 4 is the top view of end cap module of the present invention.
Fig. 5 is the sectional view of A-A in Fig. 4.
Fig. 6 is the front view of end cap module of the present invention.
Fig. 7 is the sectional view of B-B in Fig. 6.
Fig. 8 is Fig. 6 right view.
Fig. 9 is Fig. 6 left view.
Figure 10 is the structural representation of end cap module use state of the present invention.
Figure 11 is the structural representation of end cap locating module of the present invention.
1a：Drive module；1b：End cap locating module；1c：End cap module；1：End cover body；2：Extrude sleeve；3：Sleeve
Location-plate；4：End cap location-plate；5：Bolt positioning hole；6：Perforate；7：Retreat stop block；8：Sealing ring；9：Piston slideway；10：Test
Stomata；11：Projection；12：Spacing preiection；13：Stopping mechanism；14：Piston；15：Contiguous block；16：Returning spring；17：Knee；
18：Fixed pulley；19：Storage tank；20：Baffle plate；21：Ball valve；22：End cap installing plate；23：Connecting rod；24：Drive connection block；25：Gas
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
A kind of valve end sealing mechanism, as shown in Figures 1 to 9, including end cap module 1c, end cap locating module 1b and drive
Dynamic model block 1a, described end cap module 1c include the end cover body 1 of a cylindrical shape, the end with the fixation of the afterbody of end cover body 1
Lid location-plate 4, be set in end cover body 1 the extruding sleeve 2 that can be slided along end cover body 1, be set in end cover body 1 and with
The extruding sleeve 2 afterbody sleeve location-plate 3 fixed and two stopping mechanisms 13 being arranged in end cover body 1；Described end cap
O-ring seal 8 is also arranged with main body 1, the front end side wall of end cover body 1 is provided with the spacing preiection 12 of sealing ring 8, sealing ring 8
It is spacing between spacing preiection 12 and extruding sleeve 2 front end, described spacing preiection 12 and extruding sleeve 2 front end is used for sealing ring
8 spacing faces are provided with the chamfering for being designed with 45 degree of gradients；Through end cover body 1 and end cap location-plate 4 provided with a test gas
Described end cap location-plate 4 is in " work " font, and surface both sides are provided with projection 11 after described sleeve location-plate 3, convex
Block 11 is fastened in the breach of end cap location-plate both sides, can prevent extruding sleeve 2 from moving forward and backward crush seal along end cover body 1
When enclosing 8, rotate.
Two described stopping mechanisms 13 are set along end cap central axisymmetrical, and each stopping mechanism 13 is square including one
Retreat stop block 7, a contiguous block 15, a piston 14 and a returning spring 16, open up on the described front end face of end cover body 1
There is piston slideway 9, described piston 14 is slidably disposed in piston slideway 9；Offered on the described side wall of end cover body 1
The perforate 6 for allowing retreat stop block 7 to pass through, described retreat stop block 7 are offered on the storage tank 19 of retreat stop block 7, described extruding sleeve 2
It can be moved up and down in storage tank 19, and the storage tank 19 of retreat stop block 7 is connected with the piston slideway 9 of piston 14；Described stops
The inside of block 7 is moved back provided with two fixed pulleys 18；Described one end of contiguous block 15 is connected with piston 14, and the other end is in end cap central axle
The knee 17 of line bending, described knee 17 can be stretched between two fixed pulleys 18 of retreat stop block 7, above and below the driving work of retreat stop block 7
It is mobile, when piston 14 is retreated, drive contiguous block 15 to retreat, knee of the fixed pulley 18 in retreat stop block 7 along the rear side of contiguous block 15
17 are rolled, and driving retreat stop block 7 is moved up；On the contrary, piston 14 moves forward, contiguous block 15 is driven to move forward, the edge of fixed pulley 18 in retreat stop block 7
The knee 17 for the rear side of contiguous block 15 is rolled, and driving retreat stop block 7 is moved down；One is also arranged with described contiguous block 15 is used to live
The returning spring 16 that plug 14 is replied.
A bolt positioning hole 5 is respectively provided with described 4 four angles of end cap location-plate, described bolt positioning hole 5 is just
The aircraft hole installed in bolt.
Described end cap locating module 1b includes end cap installing plate 22 and drive connection block 24, the end of the end cap module 1c
Lid location-plate 4 is fixed on end cap installing plate 22, and described drive connection block 24 runs through end cap installing plate by four connecting rods 23
22 are connected with the end cap module 1c projection 11 of sleeve location-plate 3, can drive sleeve location-plate 3 move forward, described drive connection block
24 rear sides are connected with drive module 1a cylinder 25, as shown in figure 11, and described end cap installing plate 22, which is provided with, can allow connecting rod 23
The through hole passed through, end cap installing plate 22 is limited between drive connection block 24 and end cap location-plate 4, and drive connection block 24 with
The length of connecting rod 23 between end cap location-plate 4 is more than the thickness of end cap installing plate 22.
It is additionally provided with the middle of the baffle plate 20 for the retaining of end cover body 1, baffle plate 20 and offers on front side of described end cap module 1c
The perforate for allowing end cover body 1 to pass through.
In use, cylinder 25 drives whole end cap locating module 1b and end cap module 1c to move, due to end cap module 1c's
Sealing ring 8 is provided between spacing preiection 12 and extruding sleeve 2, now, will not be slided relatively between end cover body 1 and extruding sleeve 2
It is dynamic.After end cover body 1 stretches into one end of ball valve 21, the both sides of end cap installing plate 22 are stopped by frame, stop reach, drive module
1a continues through the projection 11 that connecting rod 23 promotes the both sides of 2 rear side sleeve location-plate of extruding sleeve 3, and extruding sleeve 2 continues to move forward, squeezed
Pressure seal ring 8, the expanding extruding of sealing ring 8 realizes sealing, as shown in Figure 10 in the inwall of ball valve 21；Inside end cover
Ventilation pressurization in stomata 10, past ball valve 21 is tested, air pressure increases at any time, the compression of piston 14 in end cover body 1 is retreated, the company of drive
Connect block 15 to retreat, knee 17 of the fixed pulley 18 in retreat stop block 7 along the rear side of contiguous block 15 is rolled, driving retreat stop block 7 is moved up, and is limited
System prevents whole end cover from being increased by close beta air pressure and retreated on the baffle plate 20 of test equipment, influences measuring accuracy.
After test terminates, air pressure inside is excluded out of test stomata 10, and air pressure reduces in ball valve 21, and piston 14 is due to returning spring 16
Effect, reply reach, drive contiguous block 15 to move forward, knee 17 of the fixed pulley 18 in retreat stop block 7 along the rear side of contiguous block 15
Roll, driving retreat stop block 7 is moved down, and is lifted restrictions, cylinder 25 bounces back, retract drive connection block 24 and push projection 11, sealing ring 8
Reply and reduce, stop the extruding inwall of ball valve 21, while pulling end cover module 1c and end cap locating module 1b is retreated, end cover body 1
Removed out of ball valve 21 end face, that is, complete the test of a ball valve 21.