CN106439143B - A kind of gas control pressure-relief valve and pressure relief method - Google Patents
A kind of gas control pressure-relief valve and pressure relief method Download PDFInfo
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- CN106439143B CN106439143B CN201611030427.1A CN201611030427A CN106439143B CN 106439143 B CN106439143 B CN 106439143B CN 201611030427 A CN201611030427 A CN 201611030427A CN 106439143 B CN106439143 B CN 106439143B
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- valve
- spool
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- valve body
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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 kind of gas control pressure-relief valve and pressure relief methods.The pressure-relief valve includes valve body, spool, valve seat and cylinder block；The left end of the valve body is fixedly linked with the cylinder block, and the right end of the valve body with check valve for being connected；Piston is housed, the left end of the piston and a push rod is fixedly linked, and the right end of the push rod is inserted into the intermediate throughholes of a main spiral shell seat in the cylinder block；The right end of the main spiral shell seat is fixed on valve body；The valve seat is provided with intermediate throughholes, and the spool is in the intermediate throughholes of the valve seat；The right end of the push rod can be moved to right drives spool to move across the intermediate throughholes of main spiral shell seat；Gas vent in compressed air inlet and valve is provided in the cylinder block；The compressed air inlet is connected to the left end of the piston, and the cavity in the valve between gas vent and the right end of the piston and main spiral shell seat and the left end of valve body is connected to.The pressure-relief valve of the present invention can ensure that the rate of residual that volume is measured after pressure container pressure resistance test meets the requirement of slow release.
Description
Technical field
The present invention relates to a kind of gas control pressure-relief valve and pressure relief methods, and volume is measured after being suitable for pressure container pressure resistance test
Rate of residual needs to use when slow release, is particularly suitable for release when the water pressure test of high-pressure bottle, belongs to hydraulic technique
Field.
Background technology
With being widely used 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 specific standards and norms.In recent years, the use of compressed natural gas used as vehicle fuel is increased, right
Vehicle compressed natural gas cylinder hydraulic test method has worked out corresponding standard.Wherein, clear stipulaties pressure testing operating procedure
In there are one boosting-pressurize-release process.Slow release is required when release, it is fewer to the impact fluctuation of water in gas cylinder, it measures
The data arrived are more accurate.General pressure-relief valve cannot be satisfied and slowly unload pressure request needed for the experiment.It is general in the prior art to use
The direct release such as shut-off valve, when release, are big to line shock, and it is inaccurate to measure the data got.
It is slow that patent of the present invention can not only meet release, and has multiple piping connection holes on valve body, is connect with system
Can complete the overall process that container does boosting-pressurize-release of pressure test afterwards, have on valve it is multiple have feed liquor, go out liquid, release,
The Multifunctional pipelines connecting hole such as exhaust liquid and detection, integration degree is high, greatly reduces the leak point connected by multi-pipeline.It should
Valve mechanism simple and compact is simple to manufacture, is easy to operate, is easy to implement and automatically controls after being connect with system.
Invention content
The present invention is intended to provide a kind of gas control pressure-relief valve and pressure relief method, which can ensure that pressure vessel pressure resistance tries
The rate of residual that volume is measured after testing meets the requirement of slow release.
To achieve the goals above, the technical solution adopted in the present invention is：
A kind of gas control pressure-relief valve, including valve body, spool, valve seat and cylinder block；It is structurally characterized in that, the left end of the valve body
It is fixedly linked with the cylinder block, the right end of the valve body with check valve for being connected；
Piston is housed, the left end of the piston and a push rod is fixedly linked, and the right end of the push rod is inserted into one in the cylinder block
In the intermediate throughholes of main spiral shell seat；The right end of the main spiral shell seat is fixed on valve body；The valve seat is provided with intermediate throughholes, the spool
In the intermediate throughholes of the valve seat；The right end of the push rod can be moved to right drives spool to move across the intermediate throughholes of main spiral shell seat
It is dynamic；
The left end outlet of the right end endoporus and check valve of the valve body connects, and check valve right end is that high-potting medium enters
Mouthful, also have on the valve body connect test chamber outlet, leakage medium outlet and pressure relief outlet in valve；The high-potting medium enters
Mouth is connected to by check valve with the spool right end chamber, and the test chamber outlet that connects directly is connected to the spool right end chamber,
Leakage medium outlet is connected to by the cavity between channel and the valve seat left end and main spiral shell seat right end in the valve, the release
Outlet is connected to the intermediate throughholes of the valve seat；
Gas vent in compressed air inlet and valve is provided in the cylinder block；The compressed air inlet and the piston
Left end connection, the cavity in the valve between gas vent and the right end and main spiral shell seat and the left end of valve body of the piston connects
It is logical.
The left end of the valve body is connected through a screw thread with the cylinder block right end, and the right end of the valve body is used for and check valve phase
Even；
Gas vent is used to be discharged in time when piston moves to right when chamber air is pressurized in the valve, reduces air drag.
Since the spool amount of movement of the present invention is arranged in 0. 8mm-1 mm or is adjusted so as to smaller, valve core diameter is preferably
3.7mm, valve-seat diameter are preferably 5mm, and spool is 8.9mm or so, test(ing) medium flow with the annulus flow area that valve seat forms
Small, release speed is no more than 0.35MPa/s, so that test(ing) medium when release is flowed gentle, no impact, convenient for record and acquisition high pressure
The residual deformation value of container, keeps data more accurate, meets the requirement of the slow release of rate of residual.
It is preferred that the left big end of push rod is stretched into piston right end counterbore and is achieved a fixed connection.Push rod right end is inserted into main spiral shell seat
In intermediate throughholes.The right end of the main spiral shell seat coordinates with the valve seat；It is connect with valve body by screw thread outside right end, withstanding valve seat makes
Fitted closely with valve body；The valve seat is provided with intermediate throughholes, and the spool is in the intermediate throughholes；
According to an embodiment of the invention, further optimization can also be made to the present invention, below the skill to be formed after optimization
Art scheme：
Preferably, the openings of sizes between adjustment valve seat and spool for convenience, be set on the push rod small blind nut and
Adjusting pad, the adjusting pad are used to adjust the openings of sizes between valve seat and spool.
It is steady in order to facilitate piston guide, while ensureing the sealing effect of piston and cylinder block inner wall, outside the piston
Guide ring and y-type seal ring are housed on circumferential surface.
In order to monitor the pressure of experiment container in real time, it is provided with pressure gauge connection on the valve body, is used on the pressure gauge connection
In installation detection by the pressure gauge of pressure in experiment container.
Preferably, the valve body generally cylinder, inside be provided with stepped hole.
In order to facilitate piston reset, the elasticity for making push rod and piston left-hand reset is installed between the push rod and main spiral shell seat
Element.
In order to facilitate valve core reset, the left end of the spool is equipped with the elastic element of driving spool left-hand reset；Preferably
Elastic element includes the spring base mounted in spool left end, the spring being arranged between spring base and valve seat, and blocks spring base
Baffle ring.
Preferably, the spool is multi-diameter shaft, and the conical surface that is sealed into of the spool and valve seat is sealed with right angle, the spool
Right end head diameter is more than the diameter of liquid input section, so that flow area is changed from small to big, and form a ring between spool and valve seat endoporus
The admission chamber of shape.
Preferably, it is evenly equipped with 4 radial holes and annular chamber on the valve seat, is communicated with valve body pressure relief vent.
The check valve includes check valve body and valve ball；The check valve body have diameter be less than valve ball diameter medium into
Fluid apertures and diameter are more than the guide holder mounting hole of valve ball diameter, and guide holder is installed in the guide holder mounting hole；It is described
Guide holder has is followed successively by valve ball motion guide hole, the flexible pilot hole of reset element and medium fluid hole from left to right；It is described to lead
Be provided on seat for medium by cross recess；The reset element is stretched, and pilot hole is interior to be equipped between valve ball and guide holder
Reset element；The left part and right part of the check valve body have the external screw joint with escape.The check valve can as a result,
To adapt to the connection of tapped hydraulic cylinder or integrated distribution block etc..Cross recess symmetrical expression design, it is ensured that when operation without
Noise, impact is small, abrasion is small, service life is long.
Preferably, the medium inlet opening and valve ball moving conduit form stepped hole.
Exclusion seal effect when in order to ensure that valve is closed, the medium inlet opening and valve ball moving conduit junction are
Right angle.
In order to facilitate cleaning and safeguarding, the guide holder is removably attached in the valve ball moving conduit of check valve body.
Preferably, the right end of the check valve body is provided with the baffle ring mounting hole that diameter is more than medium fluid hole, is mounted in the gear
The baffle ring enclosed in mounting hole keeps off the guide holder in the guide holder mounting hole of check valve body.
In order to ensure the sealing effect of pipeline, the screw thread that placement combined seal ring is provided with outside the check valve body left end moves back
Cutter groove, right part is provided with the right counterbore that diameter is more than medium fluid hole, interior to place corresponding sealing ring.
Check valve is fastened in order to facilitate spanner, is hexagonal structure in the outside wall surface of the check valve body middle part.
It is described the present invention also provides a kind of pressure relief method of the gas control pressure-relief valve based on the same inventive concept
The check valve filled on valve body has high-potting medium inlet, connects test chamber outlet, leakage medium outlet and release in valve
Outlet；The high-potting medium inlet is connected to by check valve with the spool right end chamber, described to connect test chamber outlet directly
It connects and is connected to the spool right end chamber, leakage medium is exported through channel and the valve seat left end and main spiral shell seat right end in the valve
Between cavity connection, the pressure relief outlet is connected to the intermediate throughholes of the valve seat；
Gas vent in compressed air inlet and valve is provided in the cylinder block；The compressed air inlet and the piston
Left end connection, the cavity in the valve between gas vent and the right end and main spiral shell seat and the left end of valve body of the piston connects
It is logical；
The pressure relief method of the gas control pressure-relief valve includes the following steps：
S1, high-potting medium are flowed into from the high-potting medium inlet of check valve, and into after valve body, examination is connect by valve body
It tests container outlet to flow into test chamber, at this point, spool is tightly bonded with valve seat under the action of high-potting medium；
S2, when the pressure in test chamber be raised to as defined in test pressure when, stop feed flow, closed check valve, stop rise
Pressure, into packing stage；Under the effect of the pressure, after full deformation occurs for test chamber, its full deformation values is recorded；
After S3, pressurize to stipulated time, low-pressure compressed air from the compressed air inlet of cylinder block enter, push piston to
Right movement, meanwhile, piston pushes push rod to move right, and after push rod contacts spool, push rod continues right lateral and spool is pushed to delay to the right
Slow movement, makes spool and the sealing surface of valve seat slowly separate, the test(ing) medium in high pressure chest, which enters between valve seat and spool, to be formed
Annular chamber in, then the slow release since the pressure relief outlet of valve body through valve seat；Meanwhile when piston right lateral, piston and valve body it
Between air be pressurized, out of cylinder block valve gas vent be discharged；Due to the reciprocating motion of spool, a small amount of examination for adhering on spool
It tests medium to enter in the cavity between valve seat left end and main spiral shell seat right end, the leakage medium outlet outflow out of valve through valve seat；
After S4, release, piston and spool left lateral, until spool is bonded with the sealing surface of valve seat, closing valve is completed
One actuation cycle.
Since the spool amount of movement of the present invention is arranged in 0. 8mm-1 mm or is adjusted so as to smaller, valve core diameter is preferably
3.7mm, valve-seat diameter are preferably 5mm, and the annulus flow area of spool and valve seat composition is preferably 8.9mm, test(ing) medium flow
Small, release speed is no more than 0.35MPa/s, so that test(ing) medium when release is flowed gentle, no impact, convenient for record and acquisition high pressure
The residual deformation value of container, keeps data more accurate, meets the requirement of the slow release of rate of residual.
In step S1, spool is tightly bonded with valve seat under the action of high-potting medium, ensures high-potting medium not
It can leak and lead to system release.
Compared with prior art, the beneficial effects of the invention are as follows：
1, gas control pressure-relief valve of the invention can make release slow, and release speed is down to 0.35MPa/s hereinafter, test(ing) medium stream
Dynamic gentle, no impact keeps data more accurate, container can be completed after being connect with system and is done convenient for recording and acquiring test data
From the overall process of boosting-pressurize-release when pressure test, it is easy to implement and automatically controls；
2, having on valve body of the invention multiple have feed liquor, goes out the connection of the Multifunctional pipelines such as liquid, release, exhaust liquid and monitoring
Hole, integration degree is high, and pipeline leak point is made to greatly reduce；
3, valve mechanism simple and compact of the invention, be simple to manufacture, be 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 views of Fig. 1；
Fig. 3 is the valve component structural schematic diagram of the present invention；
Fig. 4 is the main spiral shell holder assembly structural schematic diagram 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 implementation mode
Come that the present invention will be described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention can be combined with each other.For sake of convenience, hereinafter as occurred
"upper", "lower", "left", "right" printed words only indicate consistent with the upper and lower, left and right direction of attached drawing itself, do not play limit to structure
It is set for using.
A kind of gas control pressure-relief valve, shown referring to FIG. 1 and FIG. 2, it is mainly by valve body 1, spool 2, valve seat 3, baffle 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, small blind nut 13, O-ring II
14, main spiral shell seat 15, spring base 16, little spring 17, O-ring III 18, O-ring IV 19, check valve 20 form.
There are a, b, c, d, e, f, g totally 7 interfaces outside gas control relief valve, a mouthfuls are high-potting medium inlet；B mouthfuls are
Connect test chamber outlet；C mouthfuls are leakage medium outlet in valve；D mouthfuls are gas vent in valve；E mouthfuls are pressure relief outlet；F mouthfuls are pressure
Power table interface；G mouthfuls are compressed air inlet.
Referring to Fig.1 and Fig. 3, Fig. 3 are valve component, and valve seat 3 is similar to multi-diameter shaft, and centre has a through-hole to be equipped with spool 2,
Uniformly distributed 4 apertures are connected with the test(ing) medium of entrance on the stage casing annular groove circumference of valve seat 3, and medium enters through 4 symmetrical apertures
In the annular chamber that valve seat is formed with valve body, then arrive the relief port of valve body.The left end counterbore of valve seat 3 is spring pilot hole, is equipped with
Little spring 17 blocks fixation, while holding spool and valve seat gluing, sealing after spring base 16 compresses little spring with baffle ring 4.Valve seat
Outer circle right end is equipped with O-ring IV 19, and left small annular groove is equipped with O-ring III, makes valve seat and valve seal.Spool is multi-diameter shaft,
And spool be located at valve seat liquid input section diameter it is smaller, make between this section and valve seat endoporus formed one annular admission chamber.
Referring to Fig.1 and Fig. 4, Fig. 4 are main spiral shell holder assembly, and main spiral shell seat is similar to multi-diameter shaft, and left end endoporus is equipped with push rod 11, sinks
After installing O-ring II 14 in hole, compressed with small blind nut.It is cased with adjusting pad 12 on push rod, is unloaded by adjusting its thickness to adjust
The openings of sizes of spool and valve seat when pressure.Compression big spring 6 is installed, big spring 6 makes push rod and work between push rod and main spiral shell seat
Plug resets.Stage casing annular groove fills O-ring I 5, and the main spiral shell holder assembly assembled is connect by right end external screw thread with valve body, valve
Seat is compressed with valve body.4 apertures are evenly equipped on main spiral shell seat excircle, extra leakage medium at this from c mouthfuls through being discharged.
Referring to Fig.1, piston right end endoporus entangles push rod big end, and there are two guide ring 7 and Y types for installation on the excircle of piston
Sealing ring 8 plays support and sealing function between piston and cylinder block 9.After 9 inner cavity of cylinder block installs piston, pass through internal thread
It is connect with valve body.
Fig. 5 is valve body, is similar to cylinder, and the external screw thread of left end and the internal thread of cylinder block connect.Right end outer surface spiral shell
It is stepped hole that milling three planes, hole easy to process, endoporus are evenly distributed at mouthful, and left end internal thread is connected with main spiral shell seat, spiral shell in right end
Line is connected with check valve 20.
Fig. 6 is cylinder block, is similar to cylinder, six side of left end milling, spanner is used when for fastening.There are one pipe screw threads for left end
Endoporus, for being connect with pneumatic pipeline.The other end radially has a small sircle hole, is gas vent, and right end internal 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, compressed spring 23, guide holder 24
Outboard leak point is not present in the whole straight-through structure formed with baffle ring 25, valve itself.21 left entry of check valve body has one shallower
Circular counter bore（26）, for placing O-ring seal, when being connect with exterior line, compress O-ring seal and seal.Together
When, left end external screw thread is machined with escape, can also place combined seal ring, and combination sealing is compressed when being connect with internal thread and is enclosed
Sealing function.There are one medium through hole, medium through hole diameters to be less than the diameter of valve ball 22 for the centre of valve body 21.The movement of valve ball 22
Channel and the junction of medium through hole are 90 ° of right angles 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 leakage.
Also there is a shallower circular counter bore in the right outlet end of valve body（27）, for placing O-ring seal, connect with exterior line
When connecing, compresses O-ring seal and seal.Ladder endoporus is sequentially arranged with valve ball 22, compressed spring 23, guide holder from left to right
24 and baffle ring 25.When assembly, compressed spring 23 is packed into guide holder 24, and compressed spring 23 withstands valve ball 22, pushes guide holder 24
To specified position, steel ball and 90 ° of right angle round wires is set tightly to seal medium through hole sealing, then fixed with baffle ring 25.At this point, check valve
It is closed.According to the size of system requirements or unidirectional valve opening pressure, different springs can be matched.Valve is replaced in cleaning
When ball 22 or spring 23, only baffle ring 25 need to be removed.
It is a cylinder that guide holder 24 is similar, left end be provided with for medium by cross recess, cross recess symmetrical structure
Design makes 22 stable movement of valve ball, and noiseless, impact is small, and abrasion is small, and service life is long.The inside is ladder hole, and left end is larger
Hole is 22 motion guide hole of valve ball, and valve ball 22 moves in a straight line, and makes stable movement.Mider hole, which is that compressed spring 23 is flexible, to be oriented to
Hole, when telescopic spring, move in a straight line, at the same can correcting valve ball 22, make stable movement.It is provided 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, which is connect by external screw thread with exterior line or integrated distribution block, it has left and right two to go out
Entrance, left end are valve medium inlet end, and right end is valve media outlet end.
When work, medium enters check valve from left end entrance, under pressure medium effect, valve ball 22 is pushed to overcome spring force
Act in guide holder 24 and move right, steel ball leaves at medium through hole sealing, and medium is along ten of steel ball face through guide holder 24
Word slot uniformly flows into after guide holder inner cavity is converged and exports steady outflow, Open valve from right end compared with small through hole through right end.Work as cut-out
After entrance medium, steel ball moves downward under spring force, contacts, is sealed in valve at valve ball 22 and check valve body 21C
Medium through hole closes valve.When being connected in entrance for b mouthfuls, steel ball can not be opened under the action of spring force and pressure medium.Begin
Make medium that can only be flowed into from left end entrance in valve eventually, right end outlet outflow unidirectionally passes through.
Different thicknesses or the different spring of length can be matched according to system requirements to set the active force of spring, to set list
To the size of valve opening pressure, therefore, versatility is good.In addition, when wash-out valve or replacement valve ball 22 or spring 23, need to only remove
Baffle ring 25 assembles and easy to maintenance.
The whole circumscribed check valve of the present invention uses externally threaded linked vector graph, simple and compact for structure.Simultaneously using whole
The structure design of body through type, processing technology is good, and outboard leak point is not present in valve itself, reduces piping connection and leakage.
In addition, when cleaning and repair valve, as long as removing baffle ring wash-out valve and can replace steel ball and spring, I＆ M side
Just.
The specific work process of the pressure-relief valve of the present invention is as follows：
Referring to Fig.1, in use, high-potting medium is flowed into from high-potting medium inlet a, into after valve body, by connecing examination
It tests container outlet b and flows into test chamber, pressure gauge connection f is connected to pressure gauge, and pressure gauge can be held with Real-time and Dynamic Detection by experiment
Pressure in device.When pressure is raised to defined test pressure, stop feed flow, check valve 20 is automatically closed, and stops boosting, enters
Packing stage.Under the effect of the pressure, after full deformation occurs for tested container, its full deformation values is recorded.Pressurize is to the stipulated time
Afterwards, low-pressure compressed air enters from compressed air inlet g, overcomes the active force of big spring 6, pushes piston 10 to move right, together
When, piston 10 pushes push rod to move right, and compresses big spring 6, after push rod contacts spool, overcomes the active force of little spring 17,
Push rod continues right lateral and spool is pushed slowly to move to the right, and the spool conical surface and sealing surface of seat is made to separate, and the experiment in high pressure chest is situated between
Matter enters in the annular chamber that valve seat and spool are formed, through in the radial 4 symmetrical apertures to annular chamber of valve seat, then from pressure relief outlet e
Start slow release.Since spool amount of movement is small, spool and sealing surface of seat diameter are also small, and flow area is small, test(ing) medium stream
It measures small, keeps release slow.Meanwhile when piston right lateral, the air between piston and valve body is pressurized, and gas vent d is discharged out of valve,
Piston is prevented to be obstructed.Due to the reciprocating motion of spool, a small amount of test(ing) medium adhered on spool enters 3 left end of valve seat and main spiral shell seat
In cavity h between 15 right ends, the leakage medium outlet c outflows out of valve through 4 apertures uniformly distributed on valve seat circumference.Release terminates
Afterwards, low-pressure gas is closed, piston left lateral is pushed under the action of big spring 6, meanwhile, spool is left under the action of little spring 17
Row, until spool is bonded with sealing surface of seat, closing valve completes an actuation cycle.
The content that above-described embodiment illustrates should be understood as that these embodiments are only used for being illustrated more clearly that the present invention, without
For limiting the scope of the invention, after having read the present invention, various equivalent forms of the those skilled in the art to the present invention
Modification each fall within the application range as defined in the appended claims.
Claims (10)
1. a kind of gas control pressure-relief valve, including valve body（1）, spool（2）, valve seat（3）And cylinder block（9）；It is characterized in that, the valve
Body（1）Left end and the cylinder block（9）It is fixedly linked, the valve body（1）Right end be used for and check valve（20）It is connected；
The cylinder block（9）It is interior that piston is housed（10）, the piston（10）With a push rod（11）Left end be fixedly linked, the push rod
（11）Right end and a main spiral shell seat（15）It is connected；The main spiral shell seat（15）Right end respectively with the valve seat（3）And valve body（1）Match
It closes and is connected, make main spiral shell seat（15）Withstand valve seat（3）Make valve seat（3）With valve body（1）It fits closely；The valve seat（3）It is provided with centre
Through-hole, the spool（2）In the intermediate throughholes；
The valve body（1）Right end endoporus and check valve left end outlet connect, check valve right end be high-potting medium inlet
（a）, the valve body（1）It is upper also to connect test chamber outlet（b）, leakage medium outlet in valve（c）And pressure relief outlet（e）；It is described
High-potting medium inlet（a）Pass through check valve（20）With the spool（2）Right end chamber is connected to, described to connect test chamber outlet
（b）Directly with the spool（2）Right end chamber is connected to, leakage medium outlet in the valve（c）Pass through channel and the valve seat（3）It is left
End and main spiral shell seat（15）Cavity between right end（h）Connection, the pressure relief outlet（e）With the valve seat（3）Intermediate throughholes connect
It is logical；
The cylinder block（9）On be provided with compressed air inlet（g）With gas vent in valve（d）；The compressed air inlet（g）With
The piston（10）Left end connection, gas vent in the valve（d）With the piston（10）Right end 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, which is characterized in that the push rod（11）On be set with small blind nut（13）
And adjusting pad（12）, the adjusting pad（12）For adjusting valve seat（3）And spool（2）Between openings of sizes.
3. gas control pressure-relief valve according to claim 1, which is characterized in that the piston（10）Peripheral surface on equipped be oriented to
Ring（7）And y-type seal ring（8）.
4. gas control pressure-relief valve according to claim 1, which is characterized in that the valve body（1）On be provided with pressure gauge connection
（f）, the pressure gauge connection（f）It is upper to be detected by the pressure gauge of pressure in experiment container for installing.
5. gas control pressure-relief valve according to claim 1, which is characterized in that the valve body generally cylinder, inside open
There is stepped hole.
6. gas control pressure-relief valve according to claim 1, which is characterized in that the push rod（11）With main spiral shell seat（15）Between pacify
Equipped with making push rod（11）And piston（10）The elastic element that left-hand resets.
7. gas control pressure-relief valve according to claim 1, which is characterized in that the spool（2）Left end equipped with driving spool
The elastic element that left-hand resets；Elastic element includes being mounted in spool（2）The spring base of left end is arranged in spring base and valve seat（3）
Between spring, and block the baffle ring of spring base（4）.
8. the gas control pressure-relief valve according to one of claim 1-7, which is characterized in that the spool（2）For multi-diameter shaft, the valve
Core（2）With valve seat（3）The be sealed into conical surface and right angle seal, the spool（2）Right end head diameter be more than liquid input section it is straight
Diameter makes flow area change from small to big, and spool（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, which is characterized in that the check valve（20）Including check valve
Body（21）And valve ball（22）；The check valve body（21）It is less than valve ball with diameter（22）The medium inlet opening and diameter of diameter are big
In being installed with guide holder in the guide holder mounting hole of valve ball diameter, the guide holder mounting hole（24）；The guide holder
（24）Be followed successively by valve ball motion guide hole from left to right, reset element is stretched pilot hole and medium fluid hole；The guiding
Seat（24）On be provided with for medium by cross recess；The reset element is stretched, and pilot hole is interior to be equipped 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 gas control pressure-relief valve as described in one of claim 1-9, which is characterized in that the valve body（1）
On the check valve that is filled（20）With high-potting medium inlet（a）, connect test chamber outlet（b）, leakage medium outlet in valve
（c）And pressure relief outlet（e）；The high-potting medium inlet（a）Pass through check valve（20）With the spool（2）Right end chamber connects
It is logical, it is described to connect test chamber outlet（b）Directly with the spool（2）Right end chamber is connected to, leakage medium outlet in the valve（c）It is logical
Cross channel and the valve seat（3）Left end and main spiral shell seat（15）Cavity between right end（h）Connection, the pressure relief outlet（e）With institute
State valve seat（3）Intermediate throughholes connection；
The cylinder block（9）On be provided with compressed air inlet（g）With gas vent in valve（d）；The compressed air inlet（g）With
The piston（10）Left end connection, gas vent in the valve（d）With the piston（10）Right end and main spiral shell seat（15）And
Valve body（1）Left end between cavity connection；
The pressure relief method of the gas control pressure-relief valve includes the following steps：
S1, high-potting medium are from check valve（20）High-potting medium inlet（a）It flows into, into valve body（1）Afterwards, by valve body
（1）Connect test chamber outlet（b）It flows into test chamber, at this point, spool（2）Under the action of high-potting medium tightly with
Valve seat（3）Fitting；
S2, when the pressure in test chamber be raised to as defined in test pressure when, stop feed flow, check valve（20）It closes, stops rising
Pressure, into packing stage；Under the effect of the pressure, after full deformation occurs for test chamber, 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）Into promotion piston
（10）It moves right, meanwhile, piston（10）Push push rod（11）It moves right, works as push rod（11）Contact spool（2）Afterwards, push rod
（11）Continue right lateral and pushes spool（2）Slowly movement to the right, makes spool（2）With valve seat（3）Sealing surface slowly separate, high pressure chest
Interior test(ing) medium enters valve seat（3）With spool（2）Between in the annular chamber that is formed, then through valve seat（3）From valve body（1）Release
Outlet（e）Start slow release；Meanwhile piston（10）When right lateral, piston（10）With valve body（1）Between air be pressurized, from gas
Cylinder body（9）Valve in gas vent（d）Discharge；Due to spool（2）Reciprocating motion, spool（2）A small amount of experiment of upper attachment is situated between
Matter enters valve seat（3）Left end and main spiral shell seat（15）Cavity between right end（h）It is interior, through valve seat（3）Leakage medium exports out of valve
（c）Outflow；
After S4, release, piston（10）And spool（2）Left lateral, until spool（2）With valve seat（3）Sealing surface fitting, close
Valve completes an actuation cycle.
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| CN108458120B (en) * | 2018-04-18 | 2024-03-29 | 朱彦杰 | Pneumatic control high-low pressure air valve |
| CN110326752A (en) * | 2019-07-18 | 2019-10-15 | 马成骏 | A kind of flesh of fish machining cooking equipment |
| CN113984956B (en) * | 2021-09-22 | 2023-10-24 | 华北电力大学 | Fly ash carbon content measuring system and method for realizing controllable ash taking and carbon measurement |
| 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 |
| CN117803736B (en) * | 2024-02-28 | 2024-04-26 | 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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| US4145025A (en) * | 1976-12-13 | 1979-03-20 | B. W. B. Controls, Inc. | Control device |
| DE2960735D1 (en) * | 1978-07-12 | 1981-11-26 | Dba Sa | Hydraulic safety switch |
| CN101435446A (en) * | 2007-11-14 | 2009-05-20 | 上海立新液压有限公司 | Balance valve |
| CN201547046U (en) * | 2009-11-18 | 2010-08-11 | 宁波长壁流体连接件有限公司 | Pilot operated one-way valve |
| CN201651467U (en) * | 2010-01-14 | 2010-11-24 | 威海博胜气动液压有限公司 | Air reducing valve for vehicle |
| CN202851493U (en) * | 2012-09-24 | 2013-04-03 | 温州美瑞克液压有限公司 | Threaded inserted type counterbalance valve |
| CN104141810B (en) * | 2013-05-08 | 2016-05-18 | 中国石油化工股份有限公司 | A kind of plunger check valve |
| CN103615213B (en) * | 2013-12-02 | 2016-05-04 | 重庆市正华钻采设备有限公司 | Many wells of the well head safe control system of surging control valve |
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