CN106439143A - Pneumatically controlled pressure relief valve and pressure relief method - Google Patents
Pneumatically controlled pressure relief valve and pressure relief method Download PDFInfo
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- CN106439143A CN106439143A CN201611030427.1A CN201611030427A CN106439143A CN 106439143 A CN106439143 A CN 106439143A CN 201611030427 A CN201611030427 A CN 201611030427A CN 106439143 A CN106439143 A CN 106439143A
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- piston
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a pneumatically controlled pressure relief valve and a pressure relief method. The pressure relief valve comprises a valve body, a valve element, a valve seat and a cylinder block, wherein the left end of the valve body is fixedly connected with the cylinder block; the right end of the valve body is connected with the one-way valve; a piston is mounted in the cylinder block and is fixedly connected with the left end of a push rod; the right end of the push rod is inserted in a middle through hole of a main screw seat; the right end of the main screw seat is fixed on the valve body; a middle through hole is formed in the valve seat; the valve element is arranged in the middle through hole of the valve eat; the right end of the push rod can move rightwards and penetrates through the middle through hole of the main screw seat to drive the valve element to move; a compressed air inlet and a valve internal gas outlet are formed in the cylinder block; the compressed air inlet communicates with the left end of the piston; and the valve internal gas outlet communicates with the right end of the piston and a cavity between the main screw seat and the left end of the valve body. The pressure relief valve can guarantee that after pressure withstanding test of a pressure vessel, residual deformation rate of measurement volume meets requirements of slow pressure relief.
Description
Technical field
The present invention relates to a kind of gas control pressure-relief valve and pressure relief method, it is adaptable to measurement volume after pressure container pressure resistance test
Rate of residual need slow release when use, be particularly suited for high-pressure bottle the water pressure test when release, belong to hydraulic technique
Field.
Background technology
With widely using for compressed gas, the use of pressure vessel is also more and more.For safety, country is to pressure
The detection test method of container has clear and definite standards and norms.In recent years, the use of compressed natural gas used as vehicle fuel day by day increases, right
Vehicle compressed natural gas cylinder hydraulic test method has worked out corresponding standard.Wherein, clear stipulaties pressure test operating procedure
In have the process of a boosting-pressurize-release.Slow release is required during release, and the impact fluctuation to water in gas cylinder is fewer, measurement
The data for arriving are more accurate.General pressure-relief valve cannot meet and slowly unload pressure request needed for the test.Typically use in prior art
The directly release such as stop valve, big to line shock during release, measure the data for getting inaccurate.
Patent of the present invention can not only meet release slowly, and with multiple pipeline connecting holes on valve body, be connected with system
The overall process that container does the boosting-pressurize-release of pressure test can be completed afterwards, have on valve multiple with feed liquor, go out liquid, release,
The Multifunctional pipeline connecting hole such as exhaust liquid and detection, integration degree height, greatly reduce because of the leak point of multi-pipeline connection.Should
Valve mechanism is simply compact, is simple to manufacture, easy to operate, facilitates implementation and automatically control after being connected with system.
Content of the invention
The present invention is intended to provide a kind of gas control pressure-relief valve and pressure relief method, the pressure-relief valve can ensure that the pressure examination of pressure vessel
The rate of residual for measuring volume after testing meets the requirement of slow release.
To achieve these goals, the technical solution adopted in the present invention is：
A kind of gas control pressure-relief valve, including valve body, valve element, valve seat and cylinder block；Which is structurally characterized in that, the left end of the valve body and institute
State cylinder block to be fixedly linked, the right-hand member of the valve body is used for being connected with check valve；
The cylinder block is fixedly linked with the left end of a push rod built with piston, the piston, and the right-hand member of the push rod inserts a main spiral shell
In the intermediate throughholes of seat；The right-hand member of the main spiral shell seat is fixed on valve body；The valve seat has intermediate throughholes, and the valve element is mounted in
In the intermediate throughholes of the valve seat；The right-hand member of the push rod can be moved to right through the intermediate throughholes of main spiral shell seat and drive valve element to move；
The right-hand member endoporus of the valve body is connected with the left end outlet of check valve, and check valve right-hand member is high-potting medium inlet, institute
State on valve body to also have and connect test chamber outlet, seepage media outlet and pressure relief outlet in valve；The high-potting medium inlet leads to
Cross check valve to connect with the valve element right end chamber, described connect test chamber outlet directly connect with the valve element right end chamber, described
The cavity that in valve, seepage media outlet passes through between passage and the valve seat left end and main spiral shell seat right-hand member is connected, the pressure relief outlet
Connect with the intermediate throughholes of the valve seat；
Compressed air inlet and Fa Nei gas outlet is had in the cylinder block；A left side for the compressed air inlet and the piston
End connection, the cavity between the Fa Nei gas outlet and the right-hand member of the piston and main spiral shell seat and the left end of valve body is connected.
The left end of the valve body is threaded connection with the cylinder block right-hand member, and the right-hand member of the valve body is used for and check valve phase
Even；
The Fa Nei gas outlet be used for when piston move to right chamber air pressurized when can discharge in time, reduce air drag.
As the valve element amount of movement of the present invention is arranged on 0. 8mm-1 mm or is adjusted so as to less, valve core diameter is preferably
3.7mm, valve-seat diameter is preferably 5mm, and the annulus flow area that valve element is constituted with valve seat is 8.9mm or so, test(ing) medium flow
Little, release speed is less than 0.35MPa/s, and when making release, test(ing) medium flows gently, no impacts, is easy to record and gathers high pressure
The residual deformation value of container, makes data more accurate, meets the requirement of the slow release of rate of residual.
It is preferred that the left big end of the push rod is stretched in piston right-hand member counterbore and is achieved a fixed connection.Push rod right-hand member inserts main spiral shell seat
In intermediate throughholes.The right-hand member of the main spiral shell seat is coordinated with the valve seat；It is connected with valve body by screw thread outside right-hand member, withstanding valve seat makes
Fit tightly with valve body；The valve seat has intermediate throughholes, and the valve element is mounted in the intermediate throughholes；
Embodiments in accordance with the present invention, can also make further optimization to the present invention, be the technical side for being formed after optimization below
Case：
Preferably, openings of sizes for convenience between adjustment valve seat and valve element, is set with little blind nut and adjustment on the push rod
Pad, the adjusting pad is used for adjusting the openings of sizes between valve seat and valve element.
Piston guide is steady for convenience, while ensure the sealing effectiveness of piston and cylinder block inwall, outside the piston
Equipped with guide ring and y-type seal ring on side face.
For the pressure of real-time monitoring experiment container, on the valve body, pressure gauge connection is had, use on the pressure gauge connection
Detect by the pressure gauge of pressure in experiment container in installing.
Preferably, the valve body generally cylinder, has shoulder hole inside which.
Piston reset, is provided with the elasticity for making that push rod and piston left-hand reset between the push rod and main spiral shell seat for convenience
Element.
Valve core reset for convenience, the left end of the valve element is equipped with the flexible member for driving valve element left-hand to reset；Preferably
Flexible member includes the spring base for being mounted in valve element left end, the spring being arranged between spring base and valve seat, and blocks spring base
Back-up ring.
Preferably, the valve element is that multidiameter, the valve element is sealed with right angle with the conical surface that is sealed into of valve seat, the valve element
Right-hand member head makes flow area change from small to big with diameter greater than the diameter of liquid input section, and forms a ring between valve element and valve seat endoporus
The admission chamber of shape.
Preferably, 4 radial holes and annular chamber being evenly equipped with the valve seat, communicates with valve body pressure relief vent.
The check valve includes check valve body and valve ball；The check valve body has diameter and enters less than the medium of valve ball diameter
Fluid apertures and the guide holder installing hole with diameter greater than valve ball diameter, the guide holder is installed in the hole and is installed with guide holder；Described
Guide holder has and is followed successively by valve ball motion guide hole, reset element from left to right and stretches pilot hole and medium liquid outlet；Described lead
The cross recess for passing through for medium is had on seat；The reset element stretches pilot hole built with Wei Yu valve ball and guide holder between
Reset element；The left part of the check valve body and right part have the external screw joint with escape.Thus, the check valve can
To adapt to the connection of tapped hydraulic cylinder or integrated distribution block etc..Cross recess symmetrical expression is designed, it is ensured that during operation no
Noise, impact little, wear and tear little, long service life.
Preferably, the medium inlet opening and valve ball moving conduit form shoulder hole.
In order to ensure that exclusion seal effect during valve closing, the medium inlet opening and valve ball moving conduit junction be
Right angle.
Clean for convenience and safeguard, the guide holder is removably attached in the valve ball moving conduit of check valve body.
Preferably, the right-hand member of the check valve body has the back-up ring installing hole with diameter greater than medium liquid outlet, is mounted in the gear
Circle is installed the back-up ring of in the hole and the guide holder is kept off the guide holder installation in the hole in check valve body.
In order to ensure the sealing effectiveness of pipeline, the screw thread for having placement combined seal ring outside the check valve body left end is moved back
Cutter groove, right part has a right counterbore with diameter greater than medium liquid outlet, the corresponding sealing ring of interior placement.
Spanner fastening check valve, is hexagonal structure in outside wall surface in the middle part of the check valve body for convenience.
Based on same inventive concept, present invention also offers a kind of pressure relief method of described gas control pressure-relief valve, described
The check valve for being filled on valve body has high-potting medium inlet, connects test chamber outlet, seepage media outlet and release in valve
Outlet；The high-potting medium inlet is connected with the valve element right end chamber by check valve, and the test chamber that connects is exported directly
Connect and connect with the valve element right end chamber, in the valve, seepage media outlet is by passage and the valve seat left end and main spiral shell seat right-hand member
Between cavity connection, the pressure relief outlet connected with the intermediate throughholes of the valve seat；
Compressed air inlet and Fa Nei gas outlet is had in the cylinder block；A left side for the compressed air inlet and the piston
End connection, the cavity between the Fa Nei gas outlet and the right-hand member of the piston and main spiral shell seat and the left end of valve body is connected；
The pressure relief method of described gas control pressure-relief valve comprises the steps：
S1, high-potting medium are flowed into from the high-potting medium inlet of check valve, after entering valve body, are held by the test that connects of valve body
Device outlet is flowed in test chamber, and now, valve element is tightly fitted with valve seat in the presence of high-potting medium；
S2, when the pressure in test chamber is raised to the test pressure of regulation, stop feed flow, closed check valve, stop boosting, enter
Enter packing stage；Under the effect of the pressure, after test chamber occurs full deformation, its full deformation values is recorded；
After S3, pressurize to stipulated time, low-pressure compressed air is entered from the compressed air inlet of cylinder block, promotes piston to transport to the right
Dynamic, meanwhile, piston promotes push rod to move right, and after push rod contacts valve element, push rod continues right lateral and promotes valve element slowly to transport to the right
Dynamic, so that valve element and the sealing surface of valve seat is slowly separated, the test(ing) medium of high pressure intracavity enters the ring for being formed between valve seat and valve element
Shape intracavity, then start slow release through valve seat from the pressure relief outlet of valve body；Meanwhile, during piston right lateral, between piston and valve body
Air is pressurized, discharges from the Fa Nei gas outlet of cylinder block；Due to the reciprocating motion of valve element, a small amount of test that adheres on valve element is situated between
In the cavity that matter is entered between valve seat left end and main spiral shell seat right-hand member, through valve seat, from valve, seepage media outlet flows out；
After S4, release terminate, piston and valve element left lateral, until valve element is fitted with the sealing surface of valve seat, valve is closed, completes one
Actuation cycle.
As the valve element amount of movement of the present invention is arranged on 0. 8mm-1 mm or is adjusted so as to less, valve core diameter is preferably
3.7mm, valve-seat diameter is preferably 5mm, and the annulus flow area that valve element is constituted with valve seat is preferably 8.9mm, test(ing) medium flow
Little, release speed is less than 0.35MPa/s, and when making release, test(ing) medium flows gently, no impacts, is easy to record and gathers high pressure
The residual deformation value of container, makes data more accurate, meets the requirement of the slow release of rate of residual.
In step S1, valve element is tightly fitted with valve seat in the presence of high-potting medium, it is ensured that high-potting medium is not
Can leak and cause system release.
Compared with prior art, the invention has the beneficial effects as follows：
1st, the gas control pressure-relief valve of the present invention can make release slow, release speed as little as below 0.35MPa/s, and test(ing) medium flowing is flat
Slow, no impact, be easy to record and gather test data, make data more accurate, can complete after being connected with system container do pressure
From the overall process of boosting-pressurize-release during test, facilitate implementation and automatically control；
2nd, have on the valve body of the present invention multiple with feed liquor, go out the Multifunctional pipeline connecting holes such as liquid, release, exhaust liquid and monitoring,
Integration degree height, greatly reduces pipeline leak point；
3rd, the valve mechanism of the present invention is simply compact, be simple to manufacture, easy to operate.
Description of the drawings
Fig. 1 is the structure principle chart of one embodiment of the invention；
Fig. 2 is the B-B sectional view of Fig. 1；
Fig. 3 is the valve component structural representation of the present invention；
Fig. 4 is the main spiral shell holder assembly structural representation of the present invention；
Fig. 5 is the valve body structure schematic diagram of the present invention；
Fig. 6 is the block structure schematic diagram of the present invention；
Fig. 7 is the vertical section schematic diagram of check valve of the present invention.
Specific embodiment
Below with reference to accompanying drawing and in conjunction with the embodiments describing the present invention in detail.It should be noted that in the feelings that does not conflict
Under condition, the embodiment in the present invention and the feature in embodiment can be mutually combined.For sake of convenience, hereinafter as occurred
" on ", D score, "left", "right" printed words, only represent consistent with the upper and lower, left and right direction of accompanying drawing itself, do not play limit to structure
It is set for using.
A kind of gas control pressure-relief valve, with reference to shown in Fig. 1 and Fig. 2, it is mainly by valve body 1, valve element 2, valve seat 3, back-up ring 4, O-ring
I 5, big spring 6, guide ring 7, y-type seal ring 8, cylinder block 9, piston 10, push rod 11, adjusting pad 12, little blind nut 13, O-ring II
14th, main spiral shell seat 15, spring base 16, little spring 17, O-ring III 18, O-ring IV 19, check valve 20 constitute.
There are a, b, c, d, e, f, g totally 7 interfaces the outside of gas control relief valve, and a mouth is high-potting medium inlet；B mouth is for connecing examination
Test container outlet；C mouth is seepage media outlet in valve；D mouth is Fa Nei gas outlet；E mouth is pressure relief outlet；F mouth is pressure gauge
Interface；G mouth is compressed air inlet.
It is that valve component, valve seat 3 is similar to multidiameter, and centre has a through hole to be provided with valve element 2 with reference to Fig. 1 and Fig. 3, Fig. 3,
On the stage casing cannelure circumference of valve seat 3, uniform 4 apertures are connected with the test(ing) medium for entering, and medium is entered through 4 symmetrical apertures
The annular intracavity that valve seat is formed with valve body, then the relief port to valve body.The left end counterbore of valve seat 3 is spring pilot hole, is provided with
Little spring 17, after spring base 16 compresses little spring, blocks fixation with back-up ring 4, while holding valve element and valve seat gluing, sealing.Valve seat
Cylindrical right-hand member is equipped with O-ring IV 19, and left little cannelure is provided with O-ring III, makes valve seat with valve seal.Valve element is multidiameter,
And valve element is less positioned at the diameter of valve seat liquid input section, makes to form the admission chamber of an annular between this section and valve seat endoporus.
Spiral shell holder assembly based on reference Fig. 1 and Fig. 4, Fig. 4, main spiral shell seat is equipped with push rod 11 similar to multidiameter, left end endoporus, sinks
After in the hole installs O-ring II 14, compressed with little blind nut.Adjusting pad 12 is cased with push rod, is unloaded to adjust by adjusting its thickness
The openings of sizes of valve element and valve seat during pressure.Compression big spring 6 is installed between push rod and main spiral shell seat, big spring 6 makes push rod and work
Plug resets.Stage casing annular groove dress O-ring I 5, the main spiral shell holder assembly for assembling is connected with valve body by right-hand member external screw thread, valve
Seat and valve body compression.4 apertures are evenly equipped with main spiral shell seat excircle, and unnecessary leakage medium is through discharging from c mouth at this.
With reference to Fig. 1, piston right-hand member endoporus entangles the big end of push rod, is provided with two guide rings 7 and Y type on the excircle of piston
Sealing ring 8, plays support and sealing function between piston and cylinder block 9.After 9 inner chamber of cylinder block installs piston, by female thread
It is connected with valve body.
Fig. 5 is valve body, and similar to cylinder, the external screw thread of left end is connected with the female thread of cylinder block.Right-hand member outer surface spiral shell
Mouthful locate three planes of uniform milling, be easy to hole is processed, endoporus is that shoulder hole, left end female thread is connected with main spiral shell seat, spiral shell in right-hand member
Stricture of vagina is connected with check valve 20.
Fig. 6 is cylinder block, and similar to cylinder, six side of left end milling, during for fastening, spanner is used.Left end has a pipe screw thread
Endoporus, for being connected with pneumatic pipeline.The other end radially has a small sircle hole, is steam vent, and right-hand member female thread is connected with valve body.
Unidirectional 20 valve of the present invention is as shown in fig. 7, comprises check valve body 21, valve ball 22, compression spring 23, guide holder 24
The overall straight-through structure for constituting with back-up ring 25, there is no outboard leak point in valve itself.21 left entry of check valve body has one shallower
Circular counter bore（26）, for placing O-ring seal, when being connected with exterior line, compression O-ring seal seals.With
When, left end external screw thread is machined with escape, also can place combined seal ring, and when being connected with female thread, compression combination sealing is enclosed
Sealing function.There is a medium through hole centre of valve body 21, and medium through hole diameter is less than the diameter of valve ball 22.The motion of valve ball 22
Passage and 90 ° of right angles that the junction of medium through hole is that unclear angle processes, when pipeline stops feed liquor, right angle and valve ball at this
22 sphere-contact seals, and to close valve, prevents interior seepage.
The right port of export of valve body also has a shallower circular counter bore（27）, for placing O-ring seal, with exterior line even
When connecing, compression O-ring seal seals.Ladder endoporus is sequentially arranged with valve ball 22, compression spring 23, guide holder from left to right
24 and back-up ring 25.During assembling, compression spring 23 loads in guide holder 24, and compression spring 23 withstands valve ball 22, promotes guide holder 24
To assigned position, make steel ball and 90 ° of right angle round wires that medium through hole sealing is tightly sealed, then fixed with back-up ring 25.Now, check valve
It is closed.According to system requirements or the size of unidirectional valve opening pressure, different springs can be matched.Cleaning or replacing valve
When ball 22 or spring 23, only back-up ring 25 need to be pulled down.
Guide holder 24 is similar to as a cylinder, and left end has the cross recess for passing through for medium, cross recess symmetrical structure
Design, makes 22 stable movement of valve ball, noiseless, impacts little, little, long service life of wearing and tearing.The inside is ladder hole, and left end is larger
Hole is 22 motion guide hole of valve ball, and valve ball 22 moves along a straight line, and makes stable movement.Mider hole is that compression spring 23 is flexible to be oriented to
Hole, moves along a straight line during telescopic spring, at the same can correcting valve ball 22, make stable movement.Have on guide holder 24 as medium holes
（28）.Smooth cylindrical outer surface and 21 inner surface coaxial cooperation of check valve body, correcting steel ball.
With reference to Fig. 7, the one-way valve is connected with exterior line or integrated distribution block by external screw thread, and it has left and right two to go out
Entrance, it is valve media outlet end that left end is valve medium inlet end, right-hand member.
During work, medium enters check valve from left end entrance, under pressure medium effect, promotes valve ball 22 to overcome spring force
Act on and move right in guide holder 24, steel ball is left at medium through hole sealing, medium along steel ball face through guide holder 24 ten
Word groove is uniformly flowed into after guide holder inner chamber converges and is steadily flowed out from right-hand member outlet compared with small through hole through right-hand member, Open valve.Work as cut-out
After entrance medium, steel ball, is sealed in valve until valve ball 22 is contacted with check valve body 21C under spring force to left movement
Medium through hole, closes valve.When b mouth is connected in entrance, steel ball is in the presence of spring force and pressure medium, it is impossible to open.Begin
So that medium is flowed into from left end entrance in valve eventually, right-hand member outlet is flowed out, and unidirectional passes through.
The different spring of different thicknesses or length can be matched to set the active force of spring according to system requirements, set list
To the size of valve opening pressure, therefore, versatility is good.In addition, when wash-out valve or replacing valve ball 22 or spring 23, need to only pull down
Back-up ring 25, assembles and easy to maintenance.
The overall circumscribed check valve of the present invention adopts externally threaded linked vector graph, simple and compact for structure.While using whole
The structure design of body through type, processing technology is good, and valve itself does not have outboard leak point, reduces pipeline connection and leaks.
Additionally, when cleaning and maintenance valve, as long as removing wash-out valve and replacing steel ball and spring, I＆ M side by back-up ring
Just.
The specific work process of the pressure-relief valve of the present invention is as follows：
With reference to Fig. 1, during use, high-potting medium is flowed into from high-potting medium inlet a, after entering valve body, is held by test is connect
Device outlet b flows into test chamber, and pressure gauge connection f is connected to pressure gauge, and pressure gauge can be with Real-time and Dynamic Detection by test chamber
Pressure.When pressure is raised to the test pressure of regulation, stop feed flow, check valve 20 is automatically switched off, stop boosting, enter pressurize
Stage.Under the effect of the pressure, after tested container occurs full deformation, its full deformation values is recorded.Pressurize is to after the stipulated time, low
Pressure compressed air is entered from compressed air inlet g, overcomes the active force of big spring 6, promotes piston 10 to move right, meanwhile, living
Plug 10 promotes push rod to move right, and compresses big spring 6, after push rod contacts valve element, overcomes the active force of little spring 17, and push rod continues
Continuous right lateral promotes valve element slowly to move to the right, separates the valve element conical surface and sealing surface of seat, and the test(ing) medium of high pressure intracavity is entered
The annular intracavity that valve seat is formed with valve element, through valve seat, radially 4 symmetrical apertures start to delay in annular chamber, then from pressure relief outlet e
Slow release.As valve element amount of movement is little, valve element is also little with sealing surface of seat diameter, and flow area is little, and test(ing) medium flow is little, makes
Release is slow.Meanwhile, during piston right lateral, the air between piston and valve body is pressurized, discharges from Fa Nei gas outlet d, prevents from living
Plug is obstructed.Due to the reciprocating motion of valve element, a small amount of test(ing) medium for adhering on valve element enters 3 left end of valve seat and main 15 right-hand member of spiral shell seat
Between cavity h in, through uniform 4 apertures on valve seat circumference from valve seepage media outlet c flow out.After release terminates, close
Low-pressure gas is closed, in the presence of big spring 6, piston left lateral is promoted, meanwhile, valve element left lateral in the presence of little spring 17, until
Valve element is fitted with sealing surface of seat, closes valve, completes an actuation cycle.
The content that above-described embodiment is illustrated should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, and not
For limiting the scope of the present invention, after the present invention has been read, the various equivalent form of values of the those skilled in the art to the present invention
Modification each fall within the application claims limited range.
Claims (10)
1. a kind of gas control pressure-relief valve, including valve body（1）, valve element（2）, valve seat（3）And cylinder block（9）；Characterized in that, the valve
Body（1）Left end and the cylinder block（9）It is fixedly linked, the valve body（1）Right-hand member be used for and check valve（20）It is connected；
The cylinder block（9）Built with piston（10）, the piston（10）With a push rod（11）Left end be fixedly linked, the push rod
（11）Right-hand member and a main spiral shell seat（15）It is fixedly linked；The main spiral shell seat（15）Right-hand member respectively with the valve seat（3）And valve body
（1）Coordinate and be connected, make main spiral shell seat（15）Withstand valve seat（3）Make valve seat（3）With valve body（1）Fit tightly；The valve seat（3）Have
Intermediate throughholes, the valve element（2）It is mounted in the intermediate throughholes；
The valve body（1）The left end outlet of right-hand member endoporus and check valve be connected, check valve right-hand member be
（a）, the valve body（1）The upper test chamber that also connects is exported（b）, seepage media outlet in valve（c）And pressure relief outlet（e）；Described
High-potting medium inlet（a）By check valve（20）With the valve element（2）Right end chamber is connected, and the test chamber that connects is exported
（b）Directly with the valve element（2）Right end chamber is connected, seepage media outlet in the valve（c）By passage and the valve seat（3）Left
End and main spiral shell seat（15）Cavity between right-hand member（h）Connection, the pressure relief outlet（e）With the valve seat（3）Intermediate throughholes even
Logical；
The cylinder block（9）On have compressed air inlet（g）With Fa Nei gas outlet（d）；The compressed air inlet（g）With
The piston（10）Left end connection, the Fa Nei gas outlet（d）With the piston（10）Right-hand member and main spiral shell seat（15）And
Valve body（1）Left end between cavity connection.
2. gas control pressure-relief valve according to claim 1, it is characterised in that the push rod（11）On be set with little blind nut（13）
And adjusting pad（12）, the adjusting pad（12）For adjusting valve seat（3）And valve element（2）Between openings of sizes.
3. gas control pressure-relief valve according to claim 1, it is characterised in that the piston（10）Outer peripheral face on equipped be oriented to
Ring（7）And y-type seal ring（8）.
4. gas control pressure-relief valve according to claim 1, it is characterised in that the valve body（1）On have pressure gauge connection
（f）, the pressure gauge connection（f）On for install detection by the pressure gauge of pressure in experiment container.
5. gas control pressure-relief valve according to claim 1, it is characterised in that the valve body generally cylinder, opens inside which
There is shoulder hole.
6. gas control pressure-relief valve according to claim 1, it is characterised in that the push rod（11）With main spiral shell seat（15）Between pacify
Being equipped with makes push rod（11）And piston（10）The flexible member that left-hand resets.
7. gas control pressure-relief valve according to claim 1, it is characterised in that the valve element（2）Left end equipped with drive valve element
The flexible member that left-hand resets；Preferably flexible member includes to be mounted in valve element（2）The spring base of left end, is arranged on spring base with valve
Seat（3）Between spring, and the back-up ring for blocking spring base（4）.
8. the gas control pressure-relief valve according to one of claim 1-7, it is characterised in that the valve element（2）For multidiameter, the valve
Core（2）With valve seat（3）The be sealed into conical surface and right angle seal, the valve element（2）Right-hand member head straight with diameter greater than liquid input section
Footpath, makes flow area change from small to big, and valve element（2）With valve seat（3）The admission chamber of an annular is formed between endoporus.
9. the gas control pressure-relief valve according to one of claim 1-7, it is characterised in that the check valve（20）Including check valve
Body（21）And valve ball（22）；The check valve body（21）Valve ball is less than with diameter（22）The medium inlet opening of diameter and diameter are big
In the guide holder installing hole of valve ball diameter, the guide holder is installed in the hole and is installed with guide holder（24）；The guide holder
（24）Have and be followed successively by valve ball motion guide hole, the flexible pilot hole of reset element and medium liquid outlet from left to right；The guiding
Seat（24）On have the cross recess for passing through for medium；The reset element stretches pilot hole built with positioned at valve ball（22）With guiding
Seat（24）Between reset element；The check valve body（21）Left part and right part have the external screw joint with escape.
10. a kind of pressure relief method of the gas control pressure-relief valve as described in one of claim 1-9, it is characterised in that the valve body（1）
On the check valve that filled（20）With high-potting medium inlet（a）, connect test chamber outlet（b）, seepage media outlet in valve
（c）And pressure relief outlet（e）；The high-potting medium inlet（a）By check valve（20）With the valve element（2）Right end chamber is even
Logical, the test chamber that connects is exported（b）Directly with the valve element（2）Right end chamber is connected, seepage media outlet in the valve（c）Logical
Passage is crossed with the valve seat（3）Left end and main spiral shell seat（15）Cavity between right-hand member（h）Connection, the pressure relief outlet（e）With institute
State valve seat（3）Intermediate throughholes connection；
The cylinder block（9）On have compressed air inlet（g）With Fa Nei gas outlet（d）；The compressed air inlet（g）With
The piston（10）Left end connection, the Fa Nei gas outlet（d）With the piston（10）Right-hand member and main spiral shell seat（15）And
Valve body（1）Left end between cavity connection；
The pressure relief method of described gas control pressure-relief valve comprises the steps：
S1, high-potting medium are from check valve（20）High-potting medium inlet（a）Flow into, enter valve body（1）Afterwards, by valve body
（1）Connect test chamber outlet（b）Flow in test chamber, now, valve element（2）In the presence of high-potting medium tightly with
Valve seat（3）Laminating；
S2, when the pressure in test chamber is raised to the test pressure of regulation, stop feed flow, check valve（20）Close, stop rising
Pressure, enters packing stage；Under the effect of the pressure, after test chamber occurs full deformation, its full deformation values is recorded；
After S3, pressurize to stipulated time, low-pressure compressed air is from cylinder block（9）Compressed air inlet（g）Enter, promote piston
（10）Move right, meanwhile, piston（10）Promote push rod（11）Move right, work as push rod（11）Contact valve element（2）Afterwards, push rod
（11）Continue right lateral and promote valve element（2）Slow motion, makes valve element to the right（2）With valve seat（3）Sealing surface slowly separate, high pressure chest
Interior test(ing) medium enters valve seat（3）With valve element（2）Between the annular intracavity that formed, then through valve seat（3）From valve body（1）Release
Outlet（e）Start slow release；Meanwhile, piston（10）During right lateral, piston（10）With valve body（1）Between air pressurized, from gas
Cylinder body（9）Fa Nei gas outlet（d）Discharge；Due to valve element（2）Reciprocating motion, valve element（2）A small amount of test of upper attachment is situated between
Matter enters valve seat（3）Left end and main spiral shell seat（15）Cavity between right-hand member（h）Interior, through valve seat（3）The seepage media outlet from valve
（c）Flow out；
After S4, release terminate, piston（10）And valve element（2）Left lateral, until valve element（2）With valve seat（3）Sealing surface laminating, close
Valve, completes an actuation cycle.
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| CN201611030427.1A CN106439143B (en) | 2016-11-16 | 2016-11-16 | A kind of gas control pressure-relief valve and pressure relief method |
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| CN201611030427.1A CN106439143B (en) | 2016-11-16 | 2016-11-16 | A kind of gas control pressure-relief valve and pressure relief method |
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| CN106439143B CN106439143B (en) | 2018-08-31 |
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| CN108458120A (en) * | 2018-04-18 | 2018-08-28 | 朱彦杰 | Gas control height pressure valve |
| CN110326752A (en) * | 2019-07-18 | 2019-10-15 | 马成骏 | A kind of flesh of fish machining cooking equipment |
| CN113984956A (en) * | 2021-09-22 | 2022-01-28 | 华北电力大学 | Fly ash carbon content measuring system and method for realizing controllable ash taking and carbon measuring |
| CN114776918A (en) * | 2022-03-09 | 2022-07-22 | 镇江禾正企业管理有限公司 | Sealed auto-lock pipeline of high leakproofness connects public female head soon |
| CN117803736A (en) * | 2024-02-28 | 2024-04-02 | 四川省简阳市川力机械制造有限责任公司 | Cut-off valve |
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|---|---|
| CN106439143B (en) | 2018-08-31 |
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