CN204345038U - Pneumatic valve control gear - Google Patents
Pneumatic valve control gear Download PDFInfo
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- CN204345038U CN204345038U CN201420701399.1U CN201420701399U CN204345038U CN 204345038 U CN204345038 U CN 204345038U CN 201420701399 U CN201420701399 U CN 201420701399U CN 204345038 U CN204345038 U CN 204345038U
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Abstract
The utility model provides a kind of pneumatic valve control gear, comprise solenoid valve, actuator and source of the gas, it is characterized in that, described source of the gas comprises normal pressure source of the gas and high-pressure air source, also comprise: the first three-way diverter valve, its first entry end connects normal pressure source of the gas, and its second entry end connects high-pressure air source; Reduction valve, its entry end connects the outlet end of described first three-way diverter valve; Cut-off valve, its entry end connects the outlet end of described reduction valve, and its outlet end connects the air source inlet end of described solenoid valve.Pneumatic valve control gear of the present utility model, can continue, control in time, effectively fault valve, and alleviate fault treatment pressure.
Description
Technical field
The utility model relates to pneumatic valve control field, particularly a kind of pneumatic valve control gear.
Background technique
In oxygen making unit, pneumatic valve is widely used; especially in a lot of important events; as the entry and exit of molecular sieve system; product nitrogen gas sends pipeline, expander inlet etc.; meeting design and installation two formula pneumatic valves, only open or close two states, object is according to process requirements; quickly and reliably realize circulation or the cut-out of medium, to guarantee unit safety, stable smooth operation.
Composition graphs 1 describes the control principle of pneumatic valve.By instrument conduit 301, instrument air 30 is connected with the air source inlet end 205 of solenoid valve 20, first outlet end 201 of solenoid valve 20 is connected with the first entry end 101 of actuator 10, second outlet end 202 of solenoid valve 20 is connected with the second entry end 102 of actuator 10, and the first exhaust end 203, second exhaust end 204 of solenoid valve 20 is communicated with air respectively.
By to solenoid valve 20 excitation or demagnetization, make its coil 21 obtain electric or dead electricity, the automatic control of valve switch can be realized.Such as, close when certain valve is solenoid valve 20 demagnetization, open during excitation, then:
When solenoid valve 20 is in erasing state, its coil 21 dead electricity, its spool is in home position under spring force.Air source inlet end 205 is communicated with the first outlet end 201, and the second outlet end 202 is communicated with the second exhaust end 204; Instrument supply gas sends into the pass air cavity of the first entry end 101 correspondence of actuator 10, carries out pressurising; The air cavity of opening of actuator 10 is then communicated with air, carries out pressure release; The Pneumatic component such as gear, tooth bar, piston of actuator 10 inside, by mechanical transmission, acts on and closes position, and valve keeps off status.
When after solenoid valve 20 excitation, its coil 21 obtains electric, and its spool, at electromagnetic force upper/lower positions, oppositely variation occurs.Air source inlet end 205 is communicated with the second outlet end 202, and the first outlet end 201 is communicated with the first exhaust end 203; Instrument supply gas send into actuator 10 the second entry end 102 correspondence open air cavity, carry out pressurising; The pass air cavity of actuator 10 is then communicated with air, carries out pressure release; Actuator 10 inside is by mechanical transmission, and act on open position, valve open also keeps open state.
Therefore, only in source of the gas 30 length under the prerequisite of instrument supply gas, excitation or erase signal need be sent to solenoid valve 20, make its coil 21 obtain electric or dead electricity, the automatic control of valve switch can be realized.
In actual applications, there are the following problems for existing pneumatic valve control gear:
1, solenoid valve excitation signal is moment step mutant form, and electromagnetic valve coil is inductance characteristic, can produce larger inverse electromotive force to step sudden change electrical signal, and therefore rate of fault is higher; And after solenoid valve failure, instrument supply gas accurately cannot be sent into actuator, and cause whole valve automatically to control to lose efficacy, cannot switch motion.
2, the pressure of source of the gas is at 400-500kPa, under normal circumstances, is enough to drive actuator.But when there is aging, bite situation in the transmission part such as actuator's internal gear, tooth bar, piston, or cause open and close two air cavity to leak gas blowby due to sealing part abrasion, or when causing instrument supply gas pressure drop because oxygenerator stops labour, instrument supply gas has been difficult to drive actuator, causes whole valve event malfunctioning.
3, valve does not often configure operated by handwheel mechanism, after fault cannot Non-follow control its open or close, its reason mainly contains two kinds: one is that load is high because valve installation is in large diameter pipeline, and conventional hand wheel torque power relatively low and stroke response time is long and cannot configure; Another kind is that valve restricts by technique, require that quick acting puts in place, and the operated by handwheel time is longer, cannot meet process requirements, and configuration handwheel is without practical significance.
Model utility content
The purpose of this utility model is to provide a kind of pneumatic valve control gear, use this device, can under the prerequisite not configuring handwheel, when solenoid valve or actuator break down, still can control the switch motion of two formula pneumatic valves in time, meet process requirements.
The utility model provides a kind of pneumatic valve control gear, comprise solenoid valve, actuator and source of the gas, it is characterized in that, described source of the gas comprises normal pressure source of the gas and high-pressure air source, also comprise: the first three-way diverter valve, its first entry end connects normal pressure source of the gas, and its second entry end connects high-pressure air source; Reduction valve, its entry end connects the outlet end of described first three-way diverter valve; Cut-off valve, its entry end connects the outlet end of described reduction valve, and its outlet end connects the air source inlet end of described solenoid valve.
Further, described pneumatic valve control gear also comprises hand/automatic switch unit, and it comprises: the second three-way diverter valve, and its public entry end connects the outlet end of described cut-off valve, and its first outlet end connects the air source inlet end of described solenoid valve; Four-way change-over valve, its entry end connects the second outlet end of described second three-way diverter valve, and its discharge end is communicated with air; 3rd three-way diverter valve, its first entry end connects the first outlet end of described solenoid valve, and its second entry end connects the first outlet end of described four-way change-over valve, and its public outlet end connects the first entry end of described actuator; 4th three-way diverter valve, its first entry end connects the second outlet end of described solenoid valve, and its second entry end connects the second outlet end of described four-way change-over valve, and its public outlet end connects the second entry end of described actuator.
Preferably, the pressure of described normal pressure source of the gas is between 400-500kPa, and the pressure of described high-pressure air source is between 500-600kPa.
Pneumatic valve control gear of the present utility model, by arranging normal pressure and high-pressure air source simultaneously, effectively can overcome actuator failure cannot the shortcoming of action, by arranging hand/automatic switch unit, cannot the situation of action when can avoid solenoid valve failure.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing pneumatic valve control gear;
Fig. 2 is the structural representation of pneumatic valve control gear of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, pneumatic valve control gear of the present utility model is described in further detail, but not as to restriction of the present utility model.
With reference to Fig. 2, pneumatic valve control gear of the present utility model, comprise actuator 10, solenoid valve 20, it also comprises source of the gas 100, and this source of the gas 100 comprises normal pressure source of the gas 30 and high-pressure air source 40, also comprises:
First three-way diverter valve 51, its first entry end 511 connects normal pressure source of the gas 30, and its second entry end 512 connects high-pressure air source 40, and its public outlet end 513 connects reduction valve 52 entry end;
Reduction valve 52, its outlet end connects cut-off valve 53 entry end;
And cut-off valve 53, its outlet end is connected to the air source inlet end 205 of solenoid valve 20.
Preferably, the pressure of normal pressure source of the gas 30 is adjustable in the scope of 0-500kPa, and can connect from oxygen instrument supply gas house steward, this pressure is between 400-500kPa.The pressure of high-pressure air source 40 is adjustable between 0-600kPa, and can connect from oxygen medium pressure nitrogen gas pipe network, this pressure is between 500-600kPa; Or connect from oxygen high pressure nitrogen pipe network, through being decompressed between 500-600kPa in advance.
Pneumatic valve control gear of the present utility model, by arranging normal pressure source of the gas 30 and high-pressure air source 40 simultaneously, effectively can overcome actuator 10 fault cannot the shortcoming of action.When the component failure of actuator 10, high-pressure air source 40 can be selected, make the pressure increase of the instrument supply gas of the inflatable chamber entering actuator 10, thus all parts generation action of easier pushing executing mechanism, thus effectively overcome actuator 10 fault cannot the shortcoming of action.
Further, pneumatic valve control gear of the present utility model also comprises hand/automatic switch unit 200, and it comprises:
Second three-way diverter valve 61, its public entry end 613 connects the outlet end of the cut-off valve 53 of source of the gas 100, the air source inlet end 205 of its first outlet end 611 connected electromagnetic valve 20, and its second outlet end 612 connects the entry end 623 of four-way change-over valve 62;
Four-way change-over valve 62, its first outlet end 621 connects the second entry end 632 of the 3rd three-way diverter valve 63, and its second outlet end 622 connects the second entry end 642 of the 4th three-way diverter valve 64, and its discharge end 624 is communicated with air;
3rd three-way diverter valve 63, the first outlet end 201 of its first entry end 631 connected electromagnetic valve 20, its public outlet end 633 connects the first entry end 101 of actuator 10;
4th three-way diverter valve 64, the second outlet end 202 of its first entry end 641 connected electromagnetic valve 20, its public outlet end 633 connects the second entry end 102 of actuator 10.
In this embodiment, the first exhaust end 203 of solenoid valve 20 is communicated with air respectively with the second exhaust end 204, and its coil 21 is connected to control system (such as, DCS, PLC etc.) by cable remote.
All be tightly connected with instrument conduit 301 between all parts of source of the gas 100 and hand/automatic switch unit 200.Be understandable that, instrument conduit 301 can be various metal tube, plastic tube, nylon tube etc., preferred Stainless Steel Tube or copper pipe.
The operating method of starter gate valve controlling device for doors of the present utility model is described below.
The first situation: when valve normally works, source of the gas 100 selects normal pressure source of the gas 30, and hand/automatic switch unit 200 is set to automatically, then performs following steps A 1-A4.
A1) operate the first three-way diverter valve 51, make its public outlet end 513 and the first entry end 511 conducting; Open cut-off valve 53.
A2) operate the second three-way diverter valve 61, make its public entry end 613 and the first outlet end 611 conducting; Operate the 3rd three-way diverter valve 63, make its first entry end 631 and the conducting of public outlet end 633; Operate the 4th three-way diverter valve 64, make its first entry end 641 and the conducting of public outlet end 643.
A3) regulate reduction valve 52, outlet pressure is controlled between 400-500kPa; Instrument supply gas then enters actuator 10 air cavity through solenoid valve 20, and without receiving and distributing/automatic switch unit 200.
A4) Controlling solenoid valve coil 21 obtains electric or dead electricity, and instrument supply gas 30 drives the inner corresponding mechanical transmission of actuator 10, realizes valve open/close and automatically controls.
The second situation: when actuator's 10 fault, source of the gas 100 selects high-pressure air source 40, hand/automatic switch unit 200 is still automatically, then performs following step B1-B5.
B1) operate the first three-way diverter valve 51, make its public outlet end 513 and the second entry end 512 conducting; Cut-off valve 53 is kept to open.
B2) the public entry end 613 of the second three-way diverter valve 61 and the first outlet end 611 conducting is kept; Keep the 3rd three-way diverter valve 63 first entry end 631 and the conducting of public outlet end 633; Keep the 4th three-way diverter valve 64 first entry end 641 and the conducting of public outlet end 643.
B3) regulate reduction valve 52, outlet pressure is controlled between 500-600kPa; High tension instrument gas then enters actuator 10 air cavity through solenoid valve 20, and without receiving and distributing/automatic switch unit 200.
B4) Controlling solenoid valve coil 21 obtains electric or dead electricity, and high tension instrument gas increases the thrust to actuator 10, thus drives the corresponding mechanical transmission of actuator 10 inside, realizes valve open/close and automatically controls.
B5) proper moment is treated, to actuator 10 Disintegration overhaul, recovery; After recovery, source of the gas 100 reselects as normal pressure source of the gas 30.
The third situation: when solenoid valve 20 fault, source of the gas 100 selects normal pressure source of the gas 30 constant, and hand/automatic switch unit 200 is set to manually, then performs following step C1-C5.
C1) the public outlet end 513 of the first three-way diverter valve 51 and the first entry end 511 conducting is kept; Keep cut-off valve 53 open mode.
C2) switch the second three-way diverter valve 61, make its public entry end 613 and the second outlet end 612 conducting; Switch the 3rd three-way diverter valve 63, make its second entry end 632 and the conducting of public outlet end 633; Switch the 4th three-way diverter valve 64, make its second entry end 642 and the conducting of public outlet end 643.
C3) keep reduction valve 52 outlet pressure between 400-500kPa; Instrument supply gas then through receiving and distributing/automatic switch unit 200 enters actuator 10 air cavity, and without solenoid valve 20.
C4) four-way change-over valve 62 is switched, make its entry end 623 and the first outlet end 621 conducting, discharge end 624 and the second outlet end 622 conducting, then instrument supply gas enters pass air cavity through actuator 10 first entry end 101, open air cavity then to atmospheric exhaust, throttle down also keeps closed condition;
Switch four-way change-over valve 62, make its entry end 623 and the second outlet end 622 conducting, discharge end 624 and the first outlet end 621 conducting, then instrument supply gas enters out air cavity through actuator second entry end 102, close air cavity then to atmospheric exhaust, open valve and stay open state.
C5) now, the gas circuit of solenoid valve 20 is completely isolated, directly can overhaul it, change process, can not affect valve event and on off state.
In oxygen making unit, the effect of a lot of two formula pneumatic valves is very important, and when solenoid valve 20 or actuator's 10 catastrophic failure, valve switch is out of control, and unit operation is difficult to dimension and continues.And use pneumatic valve control gear of the present utility model, and apply aforesaid operations method, fault valve can be continued, controlled in time, effectively, and alleviate fault treatment pressure.
Above embodiment is only illustrative embodiments of the present utility model, can not be used for limiting the utility model, and protection domain of the present utility model is defined by the claims.Those skilled in the art can in essence of the present utility model and protection domain, and make various amendment or equivalent replacement to the utility model, these are revised or be equal to replacement and also should be considered as dropping in protection domain of the present utility model.
Claims (3)
1. a pneumatic valve control gear, comprises solenoid valve, actuator and source of the gas, it is characterized in that, described source of the gas comprises normal pressure source of the gas and high-pressure air source, also comprises:
First three-way diverter valve, its first entry end connects normal pressure source of the gas, and its second entry end connects high-pressure air source;
Reduction valve, its entry end connects the outlet end of described first three-way diverter valve;
Cut-off valve, its entry end connects the outlet end of described reduction valve, and its outlet end connects the air source inlet end of described solenoid valve.
2. pneumatic valve control gear according to claim 1, is characterized in that, described pneumatic valve control gear also comprises hand/automatic switch unit, and it comprises:
Second three-way diverter valve, its public entry end connects the outlet end of described cut-off valve, and its first outlet end connects the air source inlet end of described solenoid valve;
Four-way change-over valve, its entry end connects the second outlet end of described second three-way diverter valve, and its discharge end is communicated with air;
3rd three-way diverter valve, its first entry end connects the first outlet end of described solenoid valve, and its second entry end connects the first outlet end of described four-way change-over valve, and its public outlet end connects the first entry end of described actuator;
4th three-way diverter valve, its first entry end connects the second outlet end of described solenoid valve, and its second entry end connects the second outlet end of described four-way change-over valve, and its public outlet end connects the second entry end of described actuator.
3. pneumatic valve control gear according to claim 1, is characterized in that, the pressure of described normal pressure source of the gas is between 400-500kPa, and the pressure of described high-pressure air source is between 500-600kPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420701399.1U CN204345038U (en) | 2014-11-20 | 2014-11-20 | Pneumatic valve control gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420701399.1U CN204345038U (en) | 2014-11-20 | 2014-11-20 | Pneumatic valve control gear |
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| Publication Number | Publication Date |
|---|---|
| CN204345038U true CN204345038U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420701399.1U Active CN204345038U (en) | 2014-11-20 | 2014-11-20 | Pneumatic valve control gear |
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| CN (1) | CN204345038U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246988A (en) * | 2016-09-12 | 2016-12-21 | 西安航天动力试验技术研究所 | The operated pneumatic valve control system of a kind of quick response and method |
| CN112443700A (en) * | 2019-09-03 | 2021-03-05 | 大连中和聚能自动控制系统有限公司 | Automatic control device for turn-off of high-pressure auxiliary valve |
-
2014
- 2014-11-20 CN CN201420701399.1U patent/CN204345038U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246988A (en) * | 2016-09-12 | 2016-12-21 | 西安航天动力试验技术研究所 | The operated pneumatic valve control system of a kind of quick response and method |
| CN106246988B (en) * | 2016-09-12 | 2018-07-03 | 西安航天动力试验技术研究所 | The operated pneumatic valve control system and method for a kind of quick response |
| CN112443700A (en) * | 2019-09-03 | 2021-03-05 | 大连中和聚能自动控制系统有限公司 | Automatic control device for turn-off of high-pressure auxiliary valve |
| CN112443700B (en) * | 2019-09-03 | 2022-09-13 | 大连中和聚能自动控制系统有限公司 | Automatic control device for turn-off of high-pressure auxiliary valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |