CN104847904A - Pneumatic cut-off valve - Google Patents
Pneumatic cut-off valve Download PDFInfo
- Publication number
- CN104847904A CN104847904A CN201510275220.XA CN201510275220A CN104847904A CN 104847904 A CN104847904 A CN 104847904A CN 201510275220 A CN201510275220 A CN 201510275220A CN 104847904 A CN104847904 A CN 104847904A
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- China
- Prior art keywords
- valve
- slot
- intake duct
- pneumatic cut
- outlet channel
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/52—Means for additional adjustment of the rate of flow
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a pneumatic cut-off valve comprising a pneumatic valve shell and a cylinder piston assembly. One end of a piston is connected with a valve stem; the valve stem is held within a cylindrical slide; one end of the valve stem is provided with a valve core; the cylindrical slide is communicated with an intake passage and an exhaust passage. The pneumatic cut-off valve further comprises a compression spring which compresses the valve core. The exhaust passage is located above the intake passage. The intake passage is communicated with the exhaust passage through a first narrow; a connection of the exhaust passage and the cylindrical slide is provided with a second narrow which is in hermetic fit with the valve core; the first narrow and the second narrow are used for being in hermetic fit with the valve core; the valve core is compressed to the second narrow by the compression spring. When not filled with drive gas, the valve core is compressed to the second narrow by the compression spring; the intake passage is communicated with the exhaust passage through the first narrow; the operating condition that vulcanizing gas continuously passes through the pneumatic cut-off valve is satisfied. The pneumatic cut-off valve has the advantages that continuously charging the drive gas to keep interior pressure of the valve is not required during passage of the vulcanizing gas, consumption of the drive gas is decreased and energy is greatly saved.
Description
Technical field
The present invention relates to valving technical field, more particularly, relate to a kind of pneumatic cut-off valve.
Background technique
In production rubber process, especially during tire production, often need to carry out sulfuration to rubber product, sulfuration is a kind of conventional rubber processing operation, be rubber macromolecule under heating with crosslinking agent sulphur generation chemical reaction, the crosslinked process becoming space network, to reach object plastic rubber being converted into elastic caoutchouc or vulcanite.And adopt sulfiding gas to carry out sulfuration to rubber to be technological means conventional in prior art, to need in sulfidation to carry out strict control to the quantity delivered of sulfurize temperature, humidity and sulfiding gas.
Usually need directly to control the flow of sulfiding gas and break-make in the path of sulfiding gas, the device of conventional control break-make is cut-off valve, the pneumatic cut-off valve of pneumatic drive is wherein adopted to be conventional technological means, but inventor finds that cut-off valve of the prior art also exists some shortcomings: pneumatic cut-off valve of the prior art is normally normally closed, namely propellant is not being had to pass into, when cut-off valve is positioned at position with no pressure, cut-off valve itself cuts out, its inside does not allow working gas and sulfiding gas to pass through, and cut-off valve just can be opened when logical propellant, pass through for working gas and sulfiding gas, work concrete condition can not be adapted to well during being designed with like this, as when needing the sulfiding gas of large discharge to continue through pneumatic cut-off valve, in order to ensure passing through smoothly of gas, pneumatic cut-off valve will keep often opening, if but keep pneumatic cut-off valve often to open and need the cylinder in pneumatic cut-off valve to maintain pressure condition, if and make cylinder maintain pressure condition relative to passive state needing relatively large working gas consumption, cause larger energy waste.
In sum, how effectively solving cut-off valve and to waste energy the problem of larger grade, is current those skilled in the art's urgent problem.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of pneumatic cut-off valve, the structural design of this pneumatic cut-off valve effectively can solve cut-off valve and takes up space comparatively large and use the problem of the larger grade that wastes energy.
In order to achieve the above object, the invention provides following technological scheme:
A kind of pneumatic cut-off valve, comprise air valve shell and the cylinder-piston assembly being arranged at air valve shell one end, piston one end in cylinder-piston assembly is connected with valve rod, valve rod is placed in the cylindricality slideway in air valve shell, the valve rod the other end is provided with the spool of shutoff air flue, cylindricality slideway is communicated with intake duct and air outlet channel, air outlet channel and intake duct are arranged along the axially lower of cylindricality slideway, be provided with the Compress Spring of spool push-tight in air valve shell, air outlet channel is positioned at the top of intake duct, intake duct is communicated with by the first slot with air outlet channel, air outlet channel is provided with the second slot for coordinating with seal spool with cylindricality slideway joining place, first slot and the second slot are used for coordinating with seal spool, spool by Compress Spring push-tight in the second slot.
Preferably, in above-mentioned pneumatic cut-off valve, intake duct and air outlet channel are all arranged at the same side of cylindricality slideway.
Preferably, in above-mentioned pneumatic cut-off valve, piston is provided with the screw axially run through along it, and valve rod is fixedly connected with by screw with piston.
Preferably, in above-mentioned pneumatic cut-off valve, the periphery of the neck that screw and piston are fitted is provided with seal groove, is provided with seal ring in seal groove.
Preferably, in above-mentioned pneumatic cut-off valve, the opening of intake duct is provided with ledge structure, and ledge structure place is removably installed with the intercepter plate of restriction gas flow, intercepter plate is provided with the pore that supplied gas is passed through.
Preferably, in above-mentioned pneumatic cut-off valve, intake duct is provided with non-return slot and non-return screw, and the large footpath, periphery of non-return screw coordinates with the inner wall sealing of non-return slot, and the axis along non-return screw is provided with the Compress Spring large footpath of non-return screw being withstood on non-return slot.
A kind of pneumatic cut-off valve provided by the invention, comprise air valve shell and the cylinder-piston assembly being arranged at air valve shell one end, piston one end in cylinder-piston assembly is connected with valve rod, valve rod is placed in the cylindricality slideway in air valve shell, valve rod one end is provided with the spool of shutoff air flue, cylindricality slideway is communicated with intake duct and air outlet channel, air outlet channel and intake duct are arranged along the axially lower of cylindricality slideway, be provided with the Compress Spring of spool push-tight in air valve shell, air outlet channel is positioned at the top of intake duct, intake duct is communicated with by the first slot with air outlet channel, air outlet channel is provided with the second slot for coordinating with seal spool with cylindricality slideway joining place, first slot and the second slot are used for coordinating with seal spool, spool by Compress Spring push-tight in the second slot.In addition air outlet channel and intake duct are arranged respectively up and down, and the spool of slot and shutoff slot is set between, spool is held out against in the second slot by Compress Spring under the state of illogical propellant, away from the first slot between intake duct and air outlet channel, intake duct is communicated with air outlet channel, the sulfiding gas meeting the needs of large discharge continues through the working condition of pneumatic cut-off valve, pneumatic cut-off valve will keep often opening, ensure that passing through smoothly of gas, the slot between intake duct and air outlet channel is blocked at logical propellant when needing to cut off, this design sulfiding gas by time do not need to continue logical propellant and make pneumatic cut-off valve inside keep pressure, so decrease the consumption of propellant, greatly save the energy.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The cross-sectional view of the pneumatic cut-off valve that Fig. 1 provides for the embodiment of the present invention.
In accompanying drawing, mark is as follows:
Air valve shell 1, cylinder-piston assembly 2, piston 21, screw 22, seal ring 23, Compress Spring 3, valve rod 4, spool 5, air outlet channel 6, non-return screw 7, intake duct 8, intercepter plate 9.
Embodiment
The embodiment of the invention discloses a kind of pneumatic cut-off valve, take up space comparatively greatly and the problem of the larger grade that wastes energy to solve cut-off valve.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, the cross-sectional view of the pneumatic cut-off valve that Fig. 1 provides for the embodiment of the present invention.Pneumatic cut-off valve provided by the invention, comprise air valve shell 1 and the cylinder-piston assembly 2 being arranged at air valve shell 1 one end, piston 21 one end in cylinder-piston assembly 2 is connected with valve rod 4, valve rod 4 is placed in the cylindricality slideway in air valve shell 1, valve rod 4 the other end is provided with the spool 5 of shutoff air flue, cylindricality slideway is communicated with intake duct 8 and air outlet channel 6, air outlet channel 6 and intake duct 8 are arranged along the axially lower of cylindricality slideway, be provided with the Compress Spring 3 of spool 5 push-tight in air valve shell 1, air outlet channel 6 is positioned at the top of intake duct 8, intake duct 8 is communicated with by the first slot with air outlet channel 6, air outlet channel 6 and cylindricality slideway joining place are provided with the second slot for being sealed and matched with spool 5, first slot and the second slot are used for being sealed and matched with spool 5, spool 5 by Compress Spring 3 push-tight in the second slot.
Wherein it should be noted that, intake duct 8 and air outlet channel 6 are arranged side by side the lower end in cylindricality slideway, air outlet channel 6 is upper, intake duct 8 under, namely the relative intake duct 8 of air outlet channel 6 is near the second slot, and linked with cylindricality slideway by the second slot, valve rod 4 is free to slide in cylindricality slideway, cylindricality slideway plays the effect of slide-and-guide, the spool 5 of its end can be moved up and down, depending on concrete operating mode shutoff first slot or the second slot, when pneumatic cut-off valve is not by propellant, spool 5 holds out against in the second slot under the effect of Compress Spring 3, now, air outlet channel 6 is communicated with by the second slot opened wide with intake duct 8, when cut-off valve is by propellant, cylinder-piston assembly 2 promotes valve rod 4 extruding Compress Spring 3 downwards, spool 5 moves downward until block the first slot, now air outlet channel 6 and intake duct 8 block.
Air outlet channel 6 and intake duct 8 are arranged respectively up and down, and the spool 5 of slot and shutoff slot is set between, spool 5 is held out against in the first slot by Compress Spring 3 under the state of illogical propellant, away from the second slot between intake duct 8 and air outlet channel 6, intake duct 8 is communicated with air outlet channel 6, the sulfiding gas meeting the needs of large discharge continues through the working condition of pneumatic cut-off valve, pneumatic cut-off valve will keep often opening, ensure that passing through smoothly of gas, the slot between intake duct 8 and air outlet channel 6 is blocked at logical propellant when needing to cut off, this design sulfiding gas by time do not need to continue logical propellant and make pneumatic cut-off valve inside keep pressure, so decrease the consumption of propellant, greatly save the energy.
For optimizing the structure of pneumatic cut-off valve in technique scheme further, on the basis of above-described embodiment, intake duct 8 and air outlet channel 6 are all arranged at the same side of cylindricality slideway.
Adopt this by the design of intake duct 8 and air outlet channel 6 arrangement side by side up and down, intake duct 8 and air outlet channel 6 are arranged at the same of the overall cut-off valve in cylindricality, greatly reduce the lateral length of cut-off valve itself, reduce cut-off valve and the space that need occupy is set.
For optimizing the linkage structure of cylinder-piston assembly 2 and valve rod 4 spool 5 in technique scheme further, on the basis of above-described embodiment, in above-mentioned pneumatic cut-off valve, piston 21 is provided with the screw 22 axially run through along it, and valve rod 4 is fixedly connected with by screw 22 with piston 21.
Wherein it should be noted that, in cylinder-piston assembly 2, valve rod 4 is installed in cylinder opening direction, and valve rod 4 end and piston 21 center are installed fastening by screw 22, reaches the technical purpose making valve rod 4 and piston 21 be synchronized with the movement.Wherein preferred directly embodiment is near piston 21 axis, directly arrange the screw mounting hole run through, and arranges at the center of valve rod 4 one end the tapped hole matched equally, and piston 21 is fixedly connected with one by mounting screw 22 with valve rod 4; The specific requirement of this exterior-view apparatus adds gasket device between screw head and piston 21 and between piston 21 and valve rod 4, makes the connection between piston 21 and valve rod 4 more firm.
Adopt the Placement of this piston 21 and valve rod 4, implement more simple, install and be relatively more prone to, only need can realize firm connection by the operation of simply punching and mounting screw 22, coupled condition is stablized, and due to structure near tie point smoothly simple, easily install seal ring 23 or other sealing configurations additional depending on seal request.
For optimizing the sealing effect of the sealing effect of piston cylinder assembly in technique scheme and piston 21 and valve rod 4 tie point further, on the basis of above-described embodiment, in above-mentioned pneumatic cut-off valve, the periphery of the neck that screw 22 and piston 21 are fitted is provided with seal groove, is provided with seal ring 23 in seal groove.
Wherein it should be noted that, for the consideration of stable connection and cost, the mounting hole that piston 21 runs through for screw 22 is that common through hole does not need to arrange screw thread, so screw 22 is provided with one section of level and smooth threadless neck between screw head and thread section, and for hard contact the between hard part is difficult to reach good sealing effect between screw 22 with piston 21, if but leave gap between screw 22 and piston 21, propellant just runs off easily via gap and causes cylinder-piston assembly 2 to leak gas, influence power device can control effects greatly, make the cut-out of the pneumatic cut-off valve under gas-powered and open and occur the not thorough slack problem of action, have impact on the use of equipment.So place arranges sealing configuration, sealing configuration is preferably disposed on the neck of screw 22, seal ring 23 position is fixed by seal groove, the effect of sealing is reached between the inwall that seal ring 23 fits tightly the mounting hole on screw 22 periphery and piston 21, greatly strengthen valve rod 4 and the sealing effect at piston 21 tie point place, reduce the risk that gas leakage occurs.Under the enlightenment of this external technical scheme, those skilled in the art also can expect the encapsulation scheme between other valve rod 4 and piston 21, as be pressed in piston 21 at screw head end face on soft gasket seal is set, reach sealing effect by soft gasket seal.
For optimizing the design of pneumatic cut-off valve in technique scheme further, the function of regulating and controlling flow is increased to pneumatic cut-off valve, on the basis of above-described embodiment, in above-mentioned pneumatic cut-off valve, the opening of intake duct 8 is provided with ledge structure, ledge structure place is removably installed with the intercepter plate 9 of restriction gas flow, intercepter plate 9 is provided with the pore that supplied gas is passed through.
Wherein it should be noted that, the structure of the opening of intake duct 8 is that the outer imperial palace of bore is little, in step-like structure, it is convenient at intake duct 8 opening installation intercepter plate 9 that this structure is set, only simply intercepter plate 9 need be stuck in ledge structure place and can reach the object of installing and fixing.
Adopt and thisly install the design proposal of intercepter plate 9 at intake duct 8 setting table stage structure, the break-make that pneumatic cut-off valve can be made incessantly can to control gas can also control the flow of gas further.In prior art category, cut-off valve is merely able to the control implementing gas break-make, and in the technical field of the application, may need to be use the flow of different sulfiding gas to adapt to different working conditions, this just requires to install flow control device additional in addition, and install troublesome poeration additional, and attachment means takies space, working zone, sometimes can not adapt to actual conditions very well.Therefore, inventor provide this intake duct 8 opening setting table stage structure, and clamp intercepter plate 9, this structure dismounting is convenient, structure is simply firm, intercepter plate 9 is divided into different model according to the size of pore above, when practical operation, can substitute into suitable intercepter plate 9 according to the flow of different sulfiding gas.
For optimizing technique scheme further, on the basis of above-described embodiment, in above-mentioned pneumatic cut-off valve, intake duct 8 is provided with non-return slot and non-return screw 7, the large footpath, periphery of non-return screw 7 coordinates with the inner wall sealing of non-return slot, and the axis along non-return screw 7 is provided with the Compress Spring 3 large footpath of non-return screw 7 being withstood on non-return slot.
Wherein it should be noted that, entering, non-return slot place is not withstood on by non-return screw 7 when gas by Compress Spring 3 in air outlet channel 6, when air outlet channel 6 has gas to pass through, non-return screw 7 is backed down under the pressure of the gas, extruding Compress Spring 3, sulfiding gas is sustainable by air outlet channel 6, and due to the design of non-return screw 7, gas is merely able to flow out from air outlet channel 6 via intake duct 8, can not reverse circulated, reach the effect of non-return, and preferably, in large footpath, the top of non-return screw 7, place arranges the sealing configurations such as seal ring 23 or sealing gasket, to optimize the sealing effect between non-return screw 7 and non-return slot, prevent gas leakage.This design makes pneumatic cut-off valve directly can have the effect of non-return, prevents the reverse circulation of sulfiding gas, has saved source of the gas, and simultaneously this design also can be exempted and installs safety check more separately, saves installation cost and also saves installing space.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a pneumatic cut-off valve, comprise air valve shell (1) and be arranged at the cylinder-piston assembly (2) of described air valve shell (1) one end, piston (21) one end in described cylinder-piston assembly (2) is connected with valve rod (4), described valve rod (4) is placed in the cylindricality slideway in described air valve shell (1), described valve rod (4) the other end is provided with the spool (5) of shutoff air flue, described cylindricality slideway is communicated with intake duct (8) and air outlet channel (6), described air outlet channel (6) and described intake duct (8) are arranged along the axially lower of described cylindricality slideway, be provided with the Compress Spring (3) of described spool (5) push-tight in described air valve shell (1), it is characterized in that, described air outlet channel (6) is positioned at the top of described intake duct (8), described intake duct (8) is communicated with by the first slot with described air outlet channel (6), described air outlet channel (6) and described cylindricality slideway joining place are provided with the second slot for being sealed and matched with described spool (5), described first slot and described second slot are used for being sealed and matched with described spool (5), described spool (5) by described Compress Spring (3) push-tight in described second slot.
2. pneumatic cut-off valve according to claim 1, is characterized in that, described intake duct (8) and described air outlet channel (6) are all arranged at the same side of described cylindricality slideway.
3. pneumatic cut-off valve according to claim 2, it is characterized in that, described piston (21) is provided with the screw (22) axially run through along it, and described valve rod (4) is fixedly connected with by described screw (22) with described piston (21).
4. pneumatic cut-off valve according to claim 3, is characterized in that, the periphery of the neck that described screw (22) and described piston (21) are fitted is provided with seal groove, is provided with seal ring (23) in described seal groove.
5. pneumatic cut-off valve according to claim 1, it is characterized in that, the opening of described intake duct (8) is provided with ledge structure, described ledge structure place is removably installed with the intercepter plate (9) of restriction gas flow, described intercepter plate (9) is provided with the pore that supplied gas is passed through.
6. the pneumatic cut-off valve according to any one of claim 1 to 5, it is characterized in that, described intake duct (8) is provided with non-return slot and non-return screw (7), the large footpath, periphery of described non-return screw (7) coordinates with the inner wall sealing of described non-return slot, and the axis along described non-return screw (7) is provided with the Compress Spring (3) the large footpath of described non-return screw (7) being withstood on described non-return slot.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510275220.XA CN104847904A (en) | 2015-05-26 | 2015-05-26 | Pneumatic cut-off valve |
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| CN201510275220.XA CN104847904A (en) | 2015-05-26 | 2015-05-26 | Pneumatic cut-off valve |
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| CN104847904A true CN104847904A (en) | 2015-08-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439211A (en) * | 2016-10-12 | 2017-02-22 | 诸暨市亿霸电子阀门有限公司 | Valve rod assembly on electronic expansion valve |
| CN109442047A (en) * | 2018-12-19 | 2019-03-08 | 重庆红江机械有限责任公司 | A kind of fuel oil gas control stop valve |
| CN110159777A (en) * | 2019-06-06 | 2019-08-23 | 沈阳航天新光集团有限公司 | A kind of pneumatic starting valve |
| CN110345263A (en) * | 2019-07-26 | 2019-10-18 | 杨佳洲 | A kind of Pneumatic two-position cut-off valve |
| CN112728171A (en) * | 2020-12-24 | 2021-04-30 | 江苏凯奥机械制造有限公司 | Petroleum control valve with anti-backflow function |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439211A (en) * | 2016-10-12 | 2017-02-22 | 诸暨市亿霸电子阀门有限公司 | Valve rod assembly on electronic expansion valve |
| CN106439211B (en) * | 2016-10-12 | 2024-04-26 | 诸暨市亿霸电子阀门有限公司 | Valve rod assembly on electronic expansion valve |
| CN109442047A (en) * | 2018-12-19 | 2019-03-08 | 重庆红江机械有限责任公司 | A kind of fuel oil gas control stop valve |
| CN109442047B (en) * | 2018-12-19 | 2023-12-19 | 重庆红江机械有限责任公司 | Fuel gas control stop valve |
| CN110159777A (en) * | 2019-06-06 | 2019-08-23 | 沈阳航天新光集团有限公司 | A kind of pneumatic starting valve |
| CN110345263A (en) * | 2019-07-26 | 2019-10-18 | 杨佳洲 | A kind of Pneumatic two-position cut-off valve |
| CN112728171A (en) * | 2020-12-24 | 2021-04-30 | 江苏凯奥机械制造有限公司 | Petroleum control valve with anti-backflow function |
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Application publication date: 20150819 |
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