CN108871707A - A kind of leakage detection apparatus of natural gas ball valve - Google Patents
A kind of leakage detection apparatus of natural gas ball valve Download PDFInfo
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- CN108871707A CN108871707A CN201810960947.5A CN201810960947A CN108871707A CN 108871707 A CN108871707 A CN 108871707A CN 201810960947 A CN201810960947 A CN 201810960947A CN 108871707 A CN108871707 A CN 108871707A
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- linker
- ball valve
- sealing cover
- piston
- positioning seat
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- 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
Abstract
The invention discloses a kind of leakage detection apparatus of natural gas ball valve, it is related to the technical field of natural gas ball valve detection, including at least a bottom plate, the bottom plate is equipped with a left positioning seat and a right positioning seat, the left positioning seat and right positioning seat or so are oppositely arranged, left positioning seat is equipped with the left limited bayonet for positioning the left adapter tube of ball valve, and right positioning seat is equipped with the right limited bayonet for positioning the right adapter tube of ball valve.The problem of present invention can press to ball valve both ends to solve existing natural gas ball valve leak test plant when testing, and ball valve deformation is caused to influence test result, proposes a kind of natural gas ball valve both ends not by axial force, the higher leakage detection apparatus of measuring accuracy.
Description
Technical field
The present invention relates to the technical field of natural gas ball valve detection more particularly to a kind of leakage detection apparatus of natural gas ball valve.
Background technique
In existing gas distributing system, metal ball-valve is gradually substituted by polyethylene ball valve, and polyethylene ball valve has weight
The advantages that light, corrosion-resistant, the service life is long is measured, while being also convenient for constructing and safeguard.
Natural gas ball valve is higher for air-tightness requirement as the open-close on-off in gas distributing system, if using
There is natural gas leaking in Cheng Zhong, it will causes the harm for being difficult to measure, therefore, all needs before the factory of natural gas ball valve by leak detection
Test.
Existing natural gas ball valve leak test plant often uses the force application apparatus such as cylinder, jack to clamp ball valve both ends, then
Air pressure is filled with toward ball valve inner cavity to be tested, but polyethylene ball valve is plastic material, axially loaded be easy to cause ball valve to deform,
Influence test result.
Summary of the invention
The present invention can press to ball valve both ends to solve existing natural gas ball valve leak test plant when testing,
The problem of causing ball valve deformation to influence test result, proposes that a kind of natural gas ball valve both ends are not higher by axial force, measuring accuracy
Leakage detection apparatus.
To achieve the goals above, the present invention uses following technical scheme：A kind of leakage detection apparatus of natural gas ball valve, at least
Including a bottom plate, the bottom plate is equipped with a left positioning seat and a right positioning seat, and the left positioning seat and right positioning seat are left
The right side is oppositely arranged, and left positioning seat is equipped with the left limited bayonet for positioning the left adapter tube of ball valve, and right positioning seat is equipped with for fixed
The right limited bayonet of the position right adapter tube of ball valve；
The upside of the bottom plate is equipped with the pressing mechanism that one is used to pressurize to ball valve left chamber and one right for testing ball valve
The pressure measuring mechanism of chamber air pressure, the pressing mechanism are located at the left side of left positioning seat, and the pressure measuring mechanism is located at the right side of right positioning seat
Side.
Preferably, the pressing mechanism includes a first motor, a driving plate, a storage air cylinder and a left sealing knot
Structure, the first motor are secured transverse on bottom plate, when the central axis and ball valve of first motor are located on the positioning seat of left and right
The centerline axis parallel of ball valve, the motor shaft top of first motor and the motor shaft are coaxially connected with one first screw rod, and described the
Be screwed on one screw rod with matched first feed screw nut of the first screw rod, the driving plate and the first feed screw nut are fixed and can be with
First feed screw nut makees left and right translation；
The storage air cylinder includes the tubular cylinder, an active piston and a relay piston of a both ends port, and the cylinder body is lateral
It is fixed on bottom plate, the centerline axis parallel of the central axis of cylinder body and the first screw rod, the active piston and relay piston are equal
Cooperation set on inner chamber of cylinder block and is slidingly sealed with inboard wall of cylinder block, relay piston is located on the right side of active piston, on the left of active piston
Face is connect by a storage pressure piston rod with driving plate, and first is equipped between the right side of relay piston and the right top surface of inner chamber of cylinder block
Spring, relay piston are equipped with a storage through relay piston or so end face and extrude stomata；
The left sealing structure includes from left to right successively including left connection board, push plate and left sealing cover, the left connection board
It fixes with driving plate, is fixedly connected between left connection board and push plate by several left connecting rods, the push plate and left sealing cover
Between pass through several second spring elastic connections；
In horizontal cylindric, the right end of left sealing cover is equipped with along its axis and protrudes into for left take over of ball valve the left sealing cover
Left socket, the left side that the bottom surface of the left socket is through to left sealing cover are equipped with pressurization aeration aperture, and the opening of left socket is set
There are a left sealing ring and a left pressure ring, the left pressure ring can translate in left socket along the central axis of left socket, the left side
The central axis along left sealing cover is equipped in socket in the first left annular slope for expanding shape, the left end of the left pressure ring is equipped with edge
The central axis of left pressure ring is in expand the second left annular slope of shape, the first left annular slope and the second left annular slope it
Between formed for positioning left sealing ring and left sealing ring locating slot in a ring, the left sealing ring is located at left sealing ring locating slot
Interior, the right end of left pressure ring stretches out in the right side of left sealing cover；
The downside of the push plate is equipped with a gas circuit linker, and the gas circuit linker includes linker outer cylinder, linker piston
It is fixed with the outer wall of linker piston rod, the linker outer cylinder with push plate, the central axis of linker outer cylinder and left sealing
The centerline axis parallel of lid, the both ends port of linker outer cylinder, the linker piston be set to linker outer cylinder in and be connected to
The inner wall of device outer cylinder is to be slidingly sealed cooperation, and one end of the linker piston rod and the right side of linker piston are fixed, separately
The right port that one end passes through linker outer cylinder stretches in the outside of linker outer cylinder, and the right side of linker piston rod and linker outer cylinder
It is to be slidingly sealed cooperation between port；Piston is equipped between the left side of linker piston and the inner hole left side of linker outer cylinder
Returning spring；Linker air inlet and linker venthole, the linker are equipped with through inside and outside wall on the linker outer cylinder
Venthole is located at the left side of linker piston and linker venthole is connected to by tracheae with the pressurization aeration aperture of left sealing cover, institute
State the storage extrusion gas that linker air inlet is located at the right side of linker piston and linker air inlet passes through tracheae and relay piston
Hole connection；The linker piston is slidably to the left side of linker venthole.
Preferably, the pressure measuring mechanism includes one second motor, a pressure gauge and a right sealing structure, second electricity
Machine is secured transverse on bottom plate, the central axis of the second motor and the centerline axis parallel of first motor, the motor of the second motor
Axis top and the motor shaft are coaxially connected with one second screw rod, are screwed on second screw rod and the second screw rod matched second
Feed screw nut；
The right sealing structure include from left to right successively include right sealing cover and right connection board, the right sealing cover and right connection
It is fixedly connected between plate by several right connecting rods, the right connection board is fixedly connected with the second feed screw nut and can be with the second screw rod
Nut makees left and right translation；
In horizontal cylindric, the left end of right sealing cover is equipped with along its axis and protrudes into for right take over of ball valve the right sealing cover
Right socket, the right side that the bottom surface of the right socket is through to right sealing cover, which is equipped with, surveys hole of calming the anger, and the opening of right socket is equipped with
One right sealing ring and a right pressure ring, the right pressure ring can translate in right socket along the central axis of right socket, described right slotting
The central axis along right sealing cover is equipped in mouthful in the first right annular slope for expanding shape, the right end of the right pressure ring is equipped with along the right side
The central axis of pressure ring is in the second right annular slope for expanding shape, between the first right annular slope and the second right annular slope
It is formed for positioning right sealing ring and right sealing ring locating slot in a ring, the right sealing ring is located at right sealing ring locating slot
Interior, the left end of right pressure ring stretches out in the left side of right sealing cover；The pressure gauge is fixed by the bracket on bottom plate, and pressure gauge is surveyed
Crimping mouth is connect by tracheae and the survey of right sealing cover hole of calming the anger.
Preferably, the left limited bayonet and right limited bayonet are the U-shaped card mouth of upward opening.
Preferably, being laterally fixed with two left polished rods, the center of two left polished rods on the left side of the left positioning seat
Centerline axis parallel of the axis with the first screw rod, is respectively provided with a push plate pilot hole at left and right sides of the push plate, and two
Push plate pilot hole is corresponded and is slidably matched with two left polished rods, and it is left close that one is respectively provided at left and right sides of the left sealing cover
Pilot hole is covered, two left sealing cover pilot holes are corresponded and are slidably matched with two left polished rods.
Preferably, being laterally fixed with two right polished rods, the center of two right polished rods on the right side of the right positioning seat
Centerline axis parallel of the axis with the second screw rod is respectively provided with a right sealing cover pilot hole at left and right sides of the right sealing cover,
Two right sealing cover pilot holes are corresponded and are slidably matched with two right polished rods.
Therefore, the present invention has the advantages that：1, test when, natural gas ball valve does not stress axially, measuring accuracy compared with
It is high；2, it is not necessarily to additional test source of inflation gas, high-pressure air source, high degree of automation can be automatically generated；3, manufacturing cost is low, test effect
Rate is high.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of another angle of the present invention.
Fig. 3 is top view of the invention.
Fig. 4 is the enlarged drawing in Fig. 3 at a.
Fig. 5 is the enlarged drawing in Fig. 3 at b.
Fig. 6 is the cross-sectional view that air cylinder is stored up in the present invention.
Fig. 7 is the cross-sectional view of left sealing structure in the present invention.
Fig. 8 is the cross-sectional view of right sealing structure in the present invention.
Fig. 9 is the structural schematic diagram of test mode of the present invention.
Figure 10 is the top view of test mode of the present invention.
Figure 11 is the main view of test mode of the present invention.
Figure 12 is the structural schematic diagram in the left sealing structure of test mode of the present invention.
1：Bottom plate；2：Left positioning seat；201：Left limited bayonet；3：Right positioning seat；301：Right limited bayonet；4：Pressuring machine
Structure；401：First motor；402：Driving plate；403：First screw rod；5：Pressure measuring mechanism；501：Second motor；502：Pressure gauge；
503：Second screw rod；503：Second feed screw nut；6：Left sealing structure；601：Left connection board；602：Push plate；603：Left sealing
Lid；604：Left connecting rod；605：Second spring；606：Left pressure ring；607：Left socket；608：Left sealing ring；609：First left annular
Inclined-plane；610：Second left annular slope；611：Left sealing ring locating slot；612：Gas circuit linker；613：Linker outer cylinder；614：
Linker piston；615：Piston returning spring；616：Linker piston rod；617：Linker venthole；618：Linker air inlet
Hole；619：Pressurization aeration aperture；7：Right sealing structure；701：Right sealing cover；702：Right connection board；703：Right connecting rod；704：Right pressure
Ring；705：Right socket；706：Right sealing ring；707：Second right annular slope；708：First right annular slope；709：Right sealing ring
Locating slot；710：Survey is calmed the anger hole；8：Store up air cylinder；801：Tubular cylinder；802：Active piston；803：Relay piston；804：Storage
Press piston rod；805：First spring；806：Storage extrudes stomata；9：Ball valve.
Specific embodiment
The present invention will be further described with specific embodiment with reference to the accompanying drawing.
A kind of leakage detection apparatus of natural gas ball valve includes at least a bottom plate 1, sets on the bottom plate 1 referring to Fig. 1 to Figure 12
There are a left positioning seat 2 and a right positioning seat 3, the left positioning seat 2 and right positioning seat 3 or so are oppositely arranged, left positioning seat 2
It is equipped with the left limited bayonet 201 for positioning the left adapter tube of ball valve 9, right positioning seat 3 is equipped with for positioning the right adapter tube of ball valve 9
Right limited bayonet 301；The left limited bayonet 201 and right limited bayonet 301 are the U-shaped card mouth of upward opening, left positioning card
The size of mouth 201 is matched with the outer diameter of the left adapter tube of ball valve 9, the size of right limited bayonet 301 and the outer diameter of the left adapter tube of ball valve 9
Size matching.
The upside of the bottom plate 1 is equipped with the pressing mechanism 4 that one is used to pressurize to 9 left chamber of ball valve and one is used to survey
It tries the pressure measuring mechanism 5 of 9 right chamber air pressure of valve, the pressing mechanism 4 is located at the left side of left positioning seat 2, and the pressure measuring mechanism 5 is located at
The right side of right positioning seat 3；When ball valve 9 is located on the positioning seat of left and right, pressing mechanism 4 is used for the left port of seal ball-valve 9 simultaneously
The pressurization in 9 left chamber of ball valve, pressure measuring mechanism 5 for seal ball-valve 9 right output port and monitor the air pressure change in 9 right chamber of ball valve into
And judge whether ball valve 9 leaks.
The pressing mechanism 4 includes a first motor 401, a driving plate 402, one storage air cylinder 8 and a left sealing structure
6, the first motor 401 is secured transverse on bottom plate 1, and the central axis and ball valve 9 of first motor 401 are located in left and right positioning
The centerline axis parallel of ball valve 9 when on seat, the motor shaft top of first motor 401 and the motor shaft are coaxially connected with one first
Bar 403, be screwed on first screw rod 403 with matched first feed screw nut of the first screw rod 403, the driving plate 402 with
First feed screw nut is fixed and can make left and right translation with the first feed screw nut.
The storage air cylinder 8 includes tubular cylinder 801, an active piston 802 and a relay piston for a both ends port
803, as shown in fig. 6, the cylinder body 801 is secured transverse on bottom plate 1, in the central axis of cylinder body 801 and the first screw rod 403
Mandrel line is parallel, and the active piston 802 and relay piston 803 are set to 801 inner cavity of cylinder body and slide with 801 inner wall of cylinder body
Sealing cooperation, relay piston 803 are located at 802 right side of active piston, and piston rod 804 is pressed by a storage in 802 left side of active piston
Connect with driving plate 402, active piston 802 can with driving plate 402 make left and right translation, the right side of relay piston 803 with
The first spring 805 is equipped between the right top surface of 801 inner cavity of cylinder body, relay piston 803 is equipped with one and runs through relay piston 803 or so
The storage of end face extrudes stomata 806.
The left sealing structure 6 includes from left to right successively including left connection board 601, push plate 602 and left sealing cover
603, as shown in fig. 7, the left connection board 601 and driving plate 402 are fixed, pass through two between left connection board 601 and push plate 602
Root left connecting rod 604 is fixedly connected, between the push plate 602 and left sealing cover 603 even by two 605 elasticity of second spring
It connects.
For the left sealing cover 603 in horizontal cylindric, the right end of left sealing cover 603 is equipped with along its axis is used for ball valve 9
Left to take over the left socket 607 protruded into, the caliber size of the left socket 607 is matched with the outer diameter of the left adapter tube of ball valve 9, described
The left side that the bottom surface of left socket 607 is through to left sealing cover 603 is equipped with pressurization aeration aperture 619, and the opening of left socket 607 is set
There are a left sealing ring 608 and a left pressure ring 606, the left pressure ring 606 can be in left socket 607 along the center of left socket 607
Axis translation, the left socket 607 is interior to be equipped with the central axis along left sealing cover 603 in the first left annular slope for expanding shape
609, the left end of the left pressure ring 606 is in the second left annular slope 610 for expanding shape equipped with the central axis along left pressure ring 606,
It is formed between the first left annular slope 609 and the second left annular slope 610 for positioning left sealing ring 608 and in a ring
Left sealing ring locating slot 611, the left sealing ring 608 are located in left sealing ring locating slot 611, and the right end of left pressure ring 606 stretches out
In the right side of left sealing cover 603.
The downside of the push plate 602 is equipped with a gas circuit linker 612, and the gas circuit linker 612 includes outside linker
Cylinder 613, linker piston 614 and linker piston rod 616, the outer wall and push plate 602 of the linker outer cylinder 613 are fixed,
The centerline axis parallel of the central axis of linker outer cylinder 613 and left sealing cover 603, the both ends port of linker outer cylinder 613, institute
Linker piston 614 is stated to be set in linker outer cylinder 613 and be to be slidingly sealed cooperation with the inner wall of linker outer cylinder 613, it is described
One end of linker piston rod 616 and the right side of linker piston 614 are fixed, and the other end passes through the right side of linker outer cylinder 613
Port stretches in the outside of linker outer cylinder 613, and is sliding between linker piston rod 616 and the right port of linker outer cylinder 613
Dynamic sealing cooperation；It is equipped with piston between the left side of linker piston 614 and the inner hole left side of linker outer cylinder 613 and replys bullet
Spring 615；It is equipped with linker air inlet 618 and linker venthole 617 through inside and outside wall on the linker outer cylinder 613, it is described
Linker venthole 617 is located at the left side of linker piston 614 and linker venthole 617 passes through tracheae and left sealing cover 603
Pressurization aeration aperture 619 be connected to, the linker air inlet 618 is located at the right side of linker piston 614 and linker air inlet
618, which extrude stomata 806 with the storage of relay piston 803 by tracheae, is connected to, under non-test state, linker venthole 617 and company
It is not connected between logical device air inlet 618 by the partition of linker piston 614；When linker piston rod 616 is by driving force to the left
When, the linker piston 614 is slidably to the left side of linker venthole 617, so that linker venthole 617 and linker
It is ipsilateral and be connected to that air inlet 618 is respectively positioned on linker piston 614.
The pressure measuring mechanism 5 includes one second motor 501, a pressure gauge 502 and a right sealing structure 7, second electricity
Machine 501 is secured transverse on bottom plate 1, the central axis of the second motor 501 and the centerline axis parallel of first motor 401, and second
The motor shaft top of motor 501 and the motor shaft are coaxially connected with one second screw rod 503, are screwed on second screw rod 503
With matched second feed screw nut 504 of the second screw rod 503；The right sealing structure 7 includes from left to right successively including right sealing
Lid 701 and right connection board 702 are fixedly connected between the right sealing cover 701 and right connection board 702 by several right connecting rods 703,
The right connection board 702 is fixedly connected with the second feed screw nut 504 and can make left and right translation, such as Fig. 5 with the second feed screw nut 504
It is shown.
For the right sealing cover 701 in horizontal cylindric, the left end of right sealing cover 701 is equipped with along its axis is used for ball valve 9
Right to take over the right socket 705 protruded into, the caliber size of the right socket 705 is matched with the outer diameter of the right adapter tube of ball valve 9, institute
The bottom surface for stating right socket 705 is through to the right side of right sealing cover 701 and is equipped with to survey and calms the anger hole 710, and the opening of right socket 705 is set
There are a right sealing ring 706 and a right pressure ring 704, the right pressure ring 704 can be in right socket 705 along the center of right socket 705
Axis translation, the right socket 705 is interior to be equipped with the central axis along right sealing cover 701 in the first right annular slope for expanding shape
708, the right end of the right pressure ring 704 is in the second right annular slope 707 for expanding shape equipped with the central axis along right pressure ring 704,
It is formed between the first right annular slope 708 and the second right annular slope 707 for positioning right sealing ring 706 and in a ring
Right sealing ring locating slot 709, the right sealing ring 706 are located in right sealing ring locating slot 709, and the left end of right pressure ring 704 is stretched out
In the left side of right sealing cover 701；The pressure gauge 502 is fixed by the bracket on bottom plate 1, and 502 pressure measurement interface of pressure gauge is logical
Tracheae and the survey of right sealing cover 701 hole 710 of calming the anger is crossed to connect.
Two left polished rods 202, the central axis of two left polished rods 202 are laterally fixed on the left side of the left positioning seat 2
Centerline axis parallel of the line with the first screw rod 403, the left and right sides of the push plate 602 are respectively provided with a push plate pilot hole,
Two push plate pilot holes are corresponded and are slidably matched with two left polished rods 202, and the left sealing cover 603 is each side
Equipped with a left sealing cover pilot hole, two left sealing cover pilot holes are corresponded and are slidably matched with two left polished rods 202, are pushed
Plate 602 and left sealing cover 603 play guiding role by two left polished rods 202.On the right side of the right positioning seat 3 laterally
Two right polished rods 302 are fixed with, centerline axis parallel of the central axis of two right polished rods 302 with the second screw rod 503 is described
The left and right sides of right sealing cover 701 is respectively provided with a right sealing cover pilot hole, two right sealing cover pilot holes and two right polished rods 302
It corresponds and is slidably matched, right sealing cover 701 plays guiding role by two right polished rods 302.
When test, first by the Spool rotating of ball valve 9 to be measured to closed state, then ball valve 9 is connected on the positioning seat of left and right,
9 valve seat of ball valve is between the positioning seat of left and right, and the left adapter tube of ball valve 9 is connected on the left limited bayonet 201 of left positioning seat 2, ball valve 9
Right adapter tube is connected on the right limited bayonet 301 of right positioning seat 3.
Start the second motor 501, the second motor 501 drives the rotation of the second screw rod 503, and then drives the second feed screw nut
504 turn right, and 3 direction of positioning seat is mobile, and right sealing cover 701 and right connection board 702 are right close as the second feed screw nut 504 is mobile
Cover in 701 moving process, the right adapter tube of ball valve 9 can protrude into the right socket 705 in 701 left side of right sealing cover, right sealing cover 701 after
Continuous movement, right 704 left side of pressure ring can be contradicted with right 3 right side of positioning seat, at this point, right pressure ring 704 stops movement, right sealing cover
701 continue to move to, and the spacing between the first right annular slope 708 and the second right annular slope 707 is gradually reduced, right sealing delineation
Right sealing ring 706 in the slot 709 of position is pressed against contract by the first right annular slope 708 and the second right annular slope 707, is held tightly
The right adapter tube outer wall of ball valve 9 simultaneously realizes sealing with the right adapter tube outer wall of ball valve 9, and then, the second motor 501 stops working, at this point, ball valve
9 right chambers are connected to pressure gauge 502, and pressure gauge 502 monitors the air pressure change in 9 right chamber of ball valve.
Restart first motor 401, first motor 401 drives the rotation of the first screw rod 403, and then drives the first feed screw nut
Turning left, 2 direction of positioning seat is mobile, and driving plate 402 is mobile with the first feed screw nut, and driving plate 402 drives storage pressure piston simultaneously again
Bar 804 and left connection board 601 are mobile.
When storage pressure piston rod 804 is mobile, driving active piston 802 is mobile toward 803 direction of relay piston, to squeeze
Cavity between active piston 802 and relay piston 803, what it is due to storage extrusion 806 other end of stomata connection is that a sealing is empty
Chamber, therefore, after the cavity between active piston 802 and relay piston 803 is extruded to a certain degree, what internal gas generated
Pressure will push relay piston 803 that active piston 802 is followed to move to right and compress the first spring 805.
Meanwhile when the movement of left connection board 601, it will drive push plate 602 and left sealing cover 603 be mobile, left sealing cover
In 603 moving process, the left adapter tube of ball valve 9 can protrude into the left socket 607 on left 603 right side of sealing cover, and left sealing cover 603 continues to move
Dynamic, left 606 right side of pressure ring can be contradicted with left 2 left side of positioning seat, at this point, left pressure ring 606 stops movement, left sealing cover 603
It continues to move to, the spacing between the first left annular slope 609 and the second left annular slope 610 is gradually reduced, left sealing ring positioning
Left sealing ring 608 in slot 611 is pressed against contract by the first left annular slope 609 and the second left annular slope 610, holds ball tightly
The left adapter tube outer wall of valve 9 simultaneously realizes sealing with the left adapter tube outer wall of ball valve 9, and then, left sealing cover 603 also stops movement.Push plate 602
It then continues to move to, compresses second spring 605, gas circuit linker 612 is continued to move to also with push plate 602, the mistake continued to move to
Cheng Zhong, the right end of linker piston rod 616 are also contradicted with the left side of left positioning seat 2, and linker piston rod 616 and linker are living
Plug 614 is blocked stopping Forward, and linker outer cylinder 613 is then continued to move to push plate 602, at this point, piston returning spring
615 start to be compressed, when linker piston 614 is moved to linker 617 left side of venthole relative to linker outer cylinder 613,
Linker venthole 617 is respectively positioned on 614 right side of linker piston with linker air inlet 618 and is connected to.At this point, first motor
401 stop working, meanwhile, storing up the compressed gas in air cylinder 8 between active piston 802 and relay piston 803 can pass sequentially through
Storage extrudes stomata 806, linker air inlet 618, linker venthole 617 and pressurization aeration aperture 619, and it is left to eventually enter into ball valve 9
It is intracavitary, increase the air pressure in 9 left chamber of ball valve as measuring air pressure, also, store up active piston 802 and relay piston in air cylinder 8
Air pressure between 803 reduces, and compressed first spring 805 can discharge elastic potential energy again, pushes relay piston 803 living toward active
Plug 802 is drawn close, and the air pressure between active piston 802 and relay piston 803 is supplemented, so that can input in 9 left chamber of ball valve
Bigger air pressure.After stable gas pressure in 9 left chamber of ball valve, operator need to only observe the atmospheric pressure value variation of pressure gauge 502
Judge ball valve 9 with the presence or absence of leakage.When the atmospheric pressure value of pressure gauge 502 constantly increases, illustrate there is gas to pass through ball in 9 left chamber of ball valve
9 spool of valve flow to 9 right chamber of ball valve, i.e., the ball valve 9 has leakage；When the atmospheric pressure value of pressure gauge 502 remains unchanged, then illustrate ball valve
It is flow to 9 right chamber of ball valve without gas in 9 left chambers, i.e., the ball valve 9 is qualification.
Claims (6)
1. a kind of leakage detection apparatus of natural gas ball valve includes at least a bottom plate（1）, it is characterised in that：The bottom plate（1）It is equipped with
One left positioning seat（2）With a right positioning seat（3）, the left positioning seat（2）With right positioning seat（3）Left and right is oppositely arranged, left
Positioning seat（2）It is equipped with for positioning ball valve（9）The left limited bayonet of left adapter tube（201）, right positioning seat（3）It is equipped with for fixed
Position ball valve（9）The right limited bayonet of right adapter tube（301）；
The bottom plate（1）Upside be equipped with one for ball valve（9）The pressing mechanism of left chamber pressurization（4）And one be used for
Test ball valve（9）The pressure measuring mechanism of right chamber air pressure（5）, the pressing mechanism（4）Positioned at left positioning seat（2）Left side, the survey
Press mechanism（5）Positioned at right positioning seat（3）Right side.
2. a kind of leakage detection apparatus of natural gas ball valve according to claim 1, it is characterised in that：The pressing mechanism（4）
Including a first motor（401）, a driving plate（402）, one storage air cylinder（8）With a left sealing structure（6）, the first motor
（401）It is secured transverse to bottom plate（1）On, first motor（401）Central axis and ball valve（9）When being located on the positioning seat of left and right
Ball valve（9）Centerline axis parallel, first motor（401）Motor shaft top and the motor shaft be coaxially connected with one first screw rod
（403）, first screw rod（403）On be screwed with and the first screw rod（403）Matched first feed screw nut, the driving plate
（402）It is fixed with the first feed screw nut and left and right translation can be made with the first feed screw nut；
The storage air cylinder（8）Tubular cylinder including a both ends port（801）, an active piston（802）With a relay piston
（803）, the cylinder body（801）It is secured transverse to bottom plate（1）On, cylinder body（801）Central axis and the first screw rod（403）In
Mandrel line is parallel, the active piston（802）And relay piston（803）It is set to cylinder body（801）Inner cavity and and cylinder body（801）
Inner wall is slidingly sealed cooperation, relay piston（803）Positioned at active piston（802）Right side, active piston（802）Left side passes through one
Storage pressure piston rod（804）With driving plate（402）Connection, relay piston（803）Right side and cylinder body（801）The right top surface of inner cavity
Between be equipped with the first spring（805）, relay piston（803）It is equipped with one and runs through relay piston（803）The storage of left and right end face extrudes
Stomata（806）；
The left sealing structure（6）Including from left to right successively including left connection board（601）, push plate（602）With left sealing cover
（603）, the left connection board（601）With driving plate（402）It is fixed, left connection board（601）And push plate（602）Pass through between if
Dry left connecting rod（604）It is fixedly connected, the push plate（602）With left sealing cover（603）Between pass through several second springs（605）
Elastic connection；
The left sealing cover（603）In horizontal cylindric, left sealing cover（603）Right end along its axis be equipped be used for ball valve
（9）It is left to take over the left socket protruded into（607）, the left socket（607）Bottom surface be through to left sealing cover（603）Left side set
There is pressurization aeration aperture（619）, left socket（607）Opening be equipped with a left sealing ring（608）With a left pressure ring（606）, described
Left pressure ring（606）It can be in left socket（607）It is interior along left socket（607）Central axis translation, the left socket（607）Inside set
Have along left sealing cover（603）Central axis be in expand the first left annular slope of shape（609）, the left pressure ring（606）A left side
End is equipped with along left pressure ring（606）Central axis be in expand the second left annular slope of shape（610）, the first left annular slope
（609）With the second left annular slope（610）Between formed for positioning left sealing ring（608）And left sealing ring positioning in a ring
Slot（611）, the left sealing ring（608）Positioned at left sealing ring locating slot（611）It is interior, left pressure ring（606）Right end stretch out in a left side
Sealing cover（603）Right side；
The push plate（602）Downside be equipped with a gas circuit linker（612）, the gas circuit linker（612）Including linker
Outer cylinder（613）, linker piston（614）With linker piston rod（616）, the linker outer cylinder（613）Outer wall and pushing
Plate（602）It is fixed, linker outer cylinder（613）Central axis and left sealing cover（603）Centerline axis parallel, linker outer cylinder
（613）Both ends port, the linker piston（614）Set on linker outer cylinder（613）It is interior and with linker outer cylinder（613）'s
Inner wall is to be slidingly sealed cooperation, the linker piston rod（616）One end and linker piston（614）Right side fix,
The other end passes through linker outer cylinder（613）Right port stretch in linker outer cylinder（613）Outside, and linker piston rod
（616）With linker outer cylinder（613）Right port between to be slidingly sealed cooperation；Linker piston（614）Left side and company
Logical device outer cylinder（613）Inner hole left side between be equipped with piston returning spring（615）；The linker outer cylinder（613）On run through
Inside and outside wall is equipped with linker air inlet（618）With linker venthole（617）, the linker venthole（617）Positioned at connection
Device piston（614）Left side and linker venthole（617）Pass through tracheae and left sealing cover（603）Pressurization aeration aperture（619）
Connection, the linker air inlet（618）Positioned at linker piston（614）Right side and linker air inlet（618）Pass through gas
Pipe and relay piston（803）Storage extrude stomata（806）Connection；The linker piston（614）Slidably to linker outlet
Hole（617）Left side.
3. a kind of leakage detection apparatus of natural gas ball valve according to claim 1 or 2, it is characterised in that：The pressure measuring mechanism
（5）Including one second motor（501）, a pressure gauge（502）With a right sealing structure（7）, second motor（501）It is laterally solid
It is scheduled on bottom plate（1）On, the second motor（501）Central axis and first motor（401）Centerline axis parallel, the second motor
（501）Motor shaft top and the motor shaft be coaxially connected with one second screw rod（503）, second screw rod（503）On screw togather
Have and the second screw rod（503）Matched second feed screw nut（504）；
The right sealing structure（7）Including from left to right successively including right sealing cover（701）And right connection board（702）, the right side
Sealing cover（701）With right connection board（702）Between pass through several right connecting rods（703）It is fixedly connected, the right connection board（702）With
Second feed screw nut（504）It is fixedly connected and can be with the second feed screw nut（504）Make left and right translation；
The right sealing cover（701）In horizontal cylindric, right sealing cover（701）Left end along its axis be equipped be used for ball valve
（9）It is right to take over the right socket protruded into（705）, the right socket（705）Bottom surface be through to right sealing cover（701）Right side set
There is survey to calm the anger hole（710）, right socket（705）Opening be equipped with a right sealing ring（706）With a right pressure ring（704）, the right side
Pressure ring（704）It can be in right socket（705）It is interior along right socket（705）Central axis translation, the right socket（705）Inside it is equipped with
Along right sealing cover（701）Central axis be in expand the first right annular slope of shape（708）, the right pressure ring（704）Right end
Equipped with along right pressure ring（704）Central axis be in expand the second right annular slope of shape（707）, the first right annular slope
（708）With the second right annular slope（707）Between formed for positioning right sealing ring（706）And right sealing ring positioning in a ring
Slot（709）, the right sealing ring（706）Positioned at right sealing ring locating slot（709）It is interior, right pressure ring（704）Left end stretch out in the right side
Sealing cover（701）Left side；The pressure gauge（502）It is fixed by the bracket in bottom plate（1）On, pressure gauge（502）Survey crimping
Mouth passes through tracheae and right sealing cover（701）Survey calm the anger hole（710）Connection.
4. a kind of leakage detection apparatus of natural gas ball valve according to claim 1, it is characterised in that：The left limited bayonet
（201）With right limited bayonet（301）It is the U-shaped card mouth of upward opening.
5. a kind of leakage detection apparatus of natural gas ball valve according to claim 2, it is characterised in that：The left positioning seat（2）
Left side on be laterally fixed with two left polished rods（202）, two left polished rods（202）Central axis with the first screw rod
（403）Centerline axis parallel, the push plate（602）The left and right sides be respectively provided with a push plate pilot hole, two push plate
Pilot hole and two left polished rods（202）It corresponds and is slidably matched, the left sealing cover（603）The left and right sides be respectively provided with one
Left sealing cover pilot hole, two left sealing cover pilot holes and two left polished rods（202）It corresponds and is slidably matched.
6. a kind of leakage detection apparatus of natural gas ball valve according to claim 3, it is characterised in that：The right positioning seat（3）
Right side on be laterally fixed with two right polished rods（302）, two right polished rods（302）Central axis with the second screw rod
（503）Centerline axis parallel, the right sealing cover（701）The left and right sides be respectively provided with a right sealing cover pilot hole, two right sides
Sealing cover pilot hole and two right polished rods（302）It corresponds and is slidably matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960947.5A CN108871707B (en) | 2018-08-22 | 2018-08-22 | Leakage detection device of natural gas ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960947.5A CN108871707B (en) | 2018-08-22 | 2018-08-22 | Leakage detection device of natural gas ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108871707A true CN108871707A (en) | 2018-11-23 |
| CN108871707B CN108871707B (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810960947.5A Active CN108871707B (en) | 2018-08-22 | 2018-08-22 | Leakage detection device of natural gas ball valve |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924100A (en) * | 2021-02-06 | 2021-06-08 | 河南永祥特检科技有限公司 | Ball valve leakproofness detection device for natural gas |
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| US5158207A (en) * | 1991-05-15 | 1992-10-27 | Tokheim Corporation | Leak detection device |
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|---|---|
| CN108871707B (en) | 2020-06-02 |
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Effective date of registration: 20200509 Address after: 116000 community 55, Dalian Economic and Technological Development Zone, Dalian City, Liaoning Province Applicant after: Dalian detai Ganghua Gas Co.,Ltd. Address before: 510000 No. 668, Whampoa Avenue, Tianhe District, Guangdong, Guangzhou Applicant before: Zou Kai |
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Address after: 116000 Community 55, Dalian Economic and Technological Development Zone, Dalian, Liaoning Province Patentee after: Dalian Detai Ganghua Gas Co.,Ltd. Address before: 116000 Community 55, Dalian Economic and Technological Development Zone, Dalian, Liaoning Province Patentee before: Dalian detai Ganghua Gas Co.,Ltd. |
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