CN205877369U - A controlling means for air piston formula actuating mechanism - Google Patents
A controlling means for air piston formula actuating mechanism Download PDFInfo
- Publication number
- CN205877369U CN205877369U CN201620831967.9U CN201620831967U CN205877369U CN 205877369 U CN205877369 U CN 205877369U CN 201620831967 U CN201620831967 U CN 201620831967U CN 205877369 U CN205877369 U CN 205877369U
- Authority
- CN
- China
- Prior art keywords
- valve
- pneumatic
- gas
- air cylinder
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a controlling means for air piston formula actuating mechanism, including cylinder cavity of resorption, cylinder epicoele, actuating mechanism, feedback device and provide the gas holder of the air supply that resets, the gas holder passes through third gas accuse valve and connects the cylinder cavity of resorption, be equipped with the piston between cylinder cavity of resorption and the cylinder epicoele, the piston passes through feedback device and connects electropneumatic valve positioner and valve, electropneumatic valve positioner's the first end of giving vent to anger, second are given vent to anger the end and are linked to each other through second gas accuse valve and first guarantor position valve and cylinder epicoele, electropneumatic valve positioner's inlet end loops through fourth gas accuse valve, second guarantor position valve and cylinder cavity of resorption and links to each other, first control end and the solenoid valve of protecting position valve and fourth gas accuse valve links to each other. The utility model discloses an it provides the operation air supply for actuating mechanism to set up gas accuse valve, guarantor's position valve and electropneumatic valve positioner to can satisfy the quick closedown of process systems and security function or the demand of opening fast respectively at normal condition, accident condition.
Description
Technical field
This utility model relates to a kind of air control unit, particularly relates to a kind of control for Pneumatic piston actuator
Device processed.
Background technology
Pneumatic control valve is exactly with compressed air as power source, with cylinder as executor, and positions by means of electrical valve
The adnexaes such as device, air filtration decompressor, electromagnetic valve, guarantor position valve Pneumatic valve go to drive valve, it is achieved switching value or proportion expression regulation,
Receive the control signal of industrial automation control system and complete to regulate pipeline medium: the various techniques such as flow, pressure, temperature
Parameter.The feature of pneumatic control valve controls simply exactly, and reaction is quick, and essential safety, is not required to additionally take explosion precaution again,
It is widely used in the industries such as oil, chemical industry, natural gas, power station, metallurgy.
Along with the development of modernization industry, large-scale thermal power machine group, large scale chemical plant need with heavy caliber, height
Surge-proof valve in the valve of parameter and large-scale compressor system.Ensure the normal work of valve, it is necessary to configuration high thrust
Actuator.From process system and Security Function Requirements valve energy quick closedown or quickly opening, regulation valve port footpath is simultaneously
DN1000 quick closedown or quickly open less than 2 seconds, cannot to meet these special for control method (time is 90 seconds) routinely
The requirement of Industry Control.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of control for Pneumatic piston actuator and fills
Put, it is possible to meet the quick closedown required by process system and security function respectively at nominal situation, accident conditions or quickly beat
The demand opened.
This utility model employed technical scheme comprise that for solving above-mentioned technical problem offer is a kind of for Pneumatic piston
The control device of actuator, including lower chamber of air cylinder, upper chamber of air cylinder, actuator, feedback device and provides for actuator
The air accumulator of reset source of the gas, described air accumulator connects lower chamber of air cylinder, described lower chamber of air cylinder and upper chamber of air cylinder by the 3rd Pneumatic valve
Between be provided with piston, described piston connects electropneumatic valve positioner and valve, described electropneumatic valve positioner by feedback device
The first outlet side, the second outlet side protect position valve by the second Pneumatic valve and first and be connected with upper chamber of air cylinder, described electrical valve
The inlet end of localizer passes sequentially through the 4th Pneumatic valve, second protects position valve and be connected with lower chamber of air cylinder, described first guarantor's position valve and the
The control end of four Pneumatic valves is connected with electromagnetic valve.
The above-mentioned control device for Pneumatic piston actuator, wherein, described air accumulator passes through check valve and electricity
Second outlet side of pneumatic valve positioner is connected, and described air accumulator is connected with upper chamber of air cylinder by the first Pneumatic valve.
The above-mentioned control device for Pneumatic piston actuator, wherein, described first Pneumatic valve, the second gas control
Valve, the 3rd Pneumatic valve and the 4th Pneumatic valve are two-position three-way, and are in fully open position when source of the gas breaks down.
The above-mentioned control device for Pneumatic piston actuator, wherein, described electromagnetic valve is two-position three-way electromagnetic
Valve, and it is in closed positions when power failure.
This utility model contrast prior art has a following beneficial effect: this utility model provide for Pneumatic piston
The control device of actuator, by arranging Pneumatic valve, protecting position valve and electropneumatic valve positioner for actuator offer operation gas
Source such that it is able to meet the quick closedown required by process system and security function or fast respectively at nominal situation, accident conditions
The demand that speed is opened.
Accompanying drawing explanation
Fig. 1 is this utility model control apparatus structure schematic diagram for Pneumatic piston actuator.
In figure:
1 valve 2 feedback device 3 valve rod
4 lower chamber of air cylinder 5 actuator 6 pistons
7 upper chamber of air cylinder 8 first protect position valve 9 first Pneumatic valve
10 pressure pipeline 11 electromagnetic valve 13 second Pneumatic valves
14 air filtration decompressor 16 Pressure gauge assembly 17 air accumulators
18 source of the gas 19 check valve 20 discharging valves
21 air filtration air relief valve 22 pressure pipeline 23 air filtration air relief valve
24 outlet side, inlet end 25 first outlet sides 26 second
28 the 3rd Pneumatic valve 29 electropneumatic valve positioner 30 the 4th Pneumatic valves
31 second protect position valve 32 trachea
Detailed description of the invention
The utility model will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is this utility model control apparatus structure schematic diagram for Pneumatic piston actuator.
Referring to Fig. 1, the control device for Pneumatic piston actuator that this utility model provides, including under cylinder
Chamber 4, actuator 5, upper chamber of air cylinder 7, electropneumatic valve positioner 29, first are protected position valve 8, second and are protected position valve the 31, first Pneumatic valve
9, the second Pneumatic valve the 13, the 3rd Pneumatic valve the 28, the 4th Pneumatic valve 30, electromagnetic valve 11, air filtration decompressor 14,21,23, unidirectional
Valve 19, air accumulator 17 etc. form.
The control device for Pneumatic piston actuator that this utility model provides, accepts actuator or control system
The current signal of output is to electropneumatic valve positioner, and electropneumatic valve positioner is by the current signal inputted and pneumatic diaphragm control valve
Feedback signal compare, the control deviation that records export corresponding air pressure through Pneumatic valve, protect position valve to pneumatic actuator, protect
Demonstrate,prove the corresponding certain valve location of certain control signal, it is achieved under nominal situation, control the action of valve.One of advantage is,
When electromagnetic valve dead electricity under accident conditions, bleed pressure passes through a direct air inlet of air inlet Pneumatic valve of one group of Pneumatic valve, another
Pneumatic valve is exitted, it is achieved valve emergency cut-off.The two of advantage are, when operating bleed pressure fault, or operation source of the gas is less than
During setting value, by the direct air inlet of air inlet Pneumatic valve by another group Pneumatic valve of the bleed pressure in air accumulator, another gas
Control valve venting, it is achieved valve emergency opening.
The air-path control system of the upper chamber of air cylinder of Pneumatic piston actuator is protected position by electropneumatic valve positioner 29, first
Valve the 8, first Pneumatic valve the 9, second Pneumatic valve 13 connects composition by different tube diameters pipe, and first protects position valve 8 and the second Pneumatic valve
13 is normal control loop, and the first Pneumatic valve 9 and electromagnetic valve 11 form accident conditions and control loop.Second Pneumatic valve 13 is normally closed
Type two-position three-way, under without control signal, 1 atretostomia, 2 mouthfuls and 3 mouthfuls of connections.Carry at setting air filtering pressure reducer 14
Supply under control signal, 1 mouthful and 2 mouthfuls of connections, 3 atretostomias.First Pneumatic valve 9 is by 1 mouthful of blocking, under without control signal, 3 mouthfuls and 2
Mouth is connected.Under two-position three way magnetic valve on-state provide control signal, 2 mouthfuls with 1 mouthful of connections, but 1 mouthful because of block, 2 mouthfuls can
As locking, 3 atretostomias.First control signal protecting position valve 8 is provided by electromagnetic valve 11, and electromagnetic valve 11 is two-position three-way electromagnetic
Valve, first protects position valve 8 connects under gas control state, locking under flatus state.
The air-path control system of the lower chamber of air cylinder of Pneumatic piston actuator is protected position by electropneumatic valve positioner 29, second
Valve the 31, the 3rd Pneumatic valve the 28, the 4th Pneumatic valve 30 connects composition by different tube diameters pipe, and second protects position valve 31 and the 4th gas control
Valve 30 is normal control loop, and the 3rd Pneumatic valve 28 and air filtration air relief valve 14 form accident conditions and control loop.4th gas
Control valve 30 is closed type two-position three-way, under without control signal, and 1 atretostomia, 2 mouthfuls and 3 mouthfuls of connections.Connect at electromagnetic valve 11
There is provided control signal to the 4th Pneumatic valve 30,1 mouthful and 2 mouthfuls of connections, 3 atretostomias under logical state.Closed type two-position three way the 3rd gas
Control valve 28 is by 1 mouthful of blocking, under without control signal, and 3 mouthfuls and 2 mouthfuls of connections.There is provided at setting air filtering pressure reducer 14 and control letter
Under number, 2 mouthfuls with 1 mouthful of connections, but 1 mouthful because of block, 2 mouthfuls can be as locking, 3 atretostomias.Second protect the control signal of position valve 31 by
Air filtration decompressor 14 provides, and second protects position valve 31 connects under gas control state, locking under flatus state.
Gas storage circuit system effect is operation source of the gas when breaking down, and provides operation gas for Pneumatic piston actuator 5
Source.Gas storage circuit system is made up of air accumulator 17, check valve 19, Large Copacity air filtration decompressor 21 and pipeline.Air accumulator 17
It is made up of Pressure gauge assembly 16, relief valve 14, discharging valve 20.In normal conditions, source of the gas 18 through check valve 19 to air accumulator 17
Inflation, under accident conditions, air accumulator 17 provides operation source of the gas through air filtration decompressor 21 to actuator 5.
Air filtration decompressor 23 provides the operation source of the gas needed for actuator 5 for electropneumatic valve positioner 29, performs machine
The source of the gas pressure value of structure 5 is set by air filtration decompressor 23.
The control device for Pneumatic piston actuator that this utility model provides, operation principle is as follows:
Under nominal situation, air filtration decompressor 14,21,23 is adjusted to the bleed pressure value needed for actuator, two three
Three-way electromagnetic valve 11 power supply P is in "on" position.Come the control signal I input electrical valve location of self tuning regulator or upper control system
Device 29, feedback signal Y of input signal I Yu actuator 5 is compared rear output bias signal by electropneumatic valve positioner 29
IY, when deviation signal IY is overgauge, electropneumatic valve positioner 29 on the first outlet side 25 output function pressure to second
1 mouthful of Pneumatic valve 13, protecting position valve 8 due to the second Pneumatic valve 13, first is under gas control state, on 1 mouthful of the second Pneumatic valve 13
Bleed pressure through 2 mouthfuls, by first protect position valve 8 to actuator 5, upper chamber of air cylinder 7, connect upper chamber of air cylinder 7 another road gas
3 mouthfuls of pipe 10 and the first Pneumatic valve 9 are connected, and the first Pneumatic valve 9 is in gas control state, 3 atretostomias, and the air pressure of upper chamber of air cylinder 7 increases
High.Connecting lower chamber of air cylinder 4 has 3 mouthfuls of two pipe roads, one of them pipeline and the 3rd Pneumatic valve 28 to be connected, the 3rd Pneumatic valve 28
It is in gas control state, 3 atretostomias, 2 mouthfuls of another road air pressure the second guarantor position valve 31 to the 4th Pneumatic valve 30 under gas control state,
4th Pneumatic valve 30 is under gas control state, and 2 mouthfuls and 1 mouthful of connection, the source of the gas of lower chamber of air cylinder 4 returns to electropneumatic valve positioner 29 row
Air.Upper chamber of air cylinder 7 is higher than lower chamber of air cylinder 4 pressure, promotes piston 6 band ovable valve stem 3 to move down, makes valve approach to turn off.Instead
Feedback quantity is sent to electropneumatic valve positioner 29 by feedback device 2, thus obtains new feedback quantity Y.Electropneumatic valve positioner 29 will
New feedback quantity Y compares with input signal I again, when deviation signal IY is in the dead zone range of actuator, and electric valve
Door positions no longer output function bleed pressure, and upper chamber of air cylinder 7 is equal with lower chamber of air cylinder 4 air pressure, and valve 1 is just parked in and controls requirement
On position.
When deviation signal IY is minus deviation, electropneumatic valve positioner 29 on inlet end 24 output function pressure to the 4th
1 mouthful of Pneumatic valve 30, it is under gas control state that the 4th Pneumatic valve 30, second protects position valve 31, the gas on 1 mouthful of the 4th Pneumatic valve 30
Source pressure, through 2 mouthfuls, by the second lower chamber of air cylinder 4 protecting position valve 31 to actuator 5, connects another road trachea of upper chamber of air cylinder 4
32 are connected with 3 mouthfuls of the 3rd Pneumatic valve 28, and the 3rd Pneumatic valve 28 is in gas control state, 3 atretostomias, and the air pressure of lower chamber of air cylinder 4 increases
High.Connecting upper chamber of air cylinder 7 has 3 mouthfuls of two pipelines, one of them pipeline and the first Pneumatic valve 9 to be connected, and the first Pneumatic valve 9 is in
Gas control state, 3 atretostomias, 2 mouthfuls of another road air pressure the first guarantor position valve 8 to the second Pneumatic valve 13 under gas control state, second
Pneumatic valve 13 is under gas control state, and 2 mouthfuls and 1 mouthful of connection, it is big that the source of the gas of upper chamber of air cylinder 7 returns to electropneumatic valve positioner 29 row
Gas.Lower chamber of air cylinder 4 is higher than upper chamber of air cylinder 7 pressure, promotes piston 6 band ovable valve stem 3 to move up, makes valve tend to opening.Feedback
Feedback quantity is sent to electropneumatic valve positioner 29 by device 2, thus obtains new feedback quantity Y.Electropneumatic valve positioner 29 will be new
Feedback quantity Y compare again with input signal I, when deviation signal IY is in the dead zone range of actuator, electrical valve
Positioning no longer output function bleed pressure, upper chamber of air cylinder 7 is equal with lower chamber of air cylinder 4 air pressure, and valve 1 is just parked in new control requirement
On position.
Under the accident conditions of power-off, three two-way electromagnetic valve 11 dead electricity, control the first Pneumatic valve the 9, the 4th in device
Pneumatic valve 30, first protects position valve 8, signal source of the gas out of hand.First protects position valve 8 locking, and electropneumatic valve positioner 29 inputs (defeated
Going out) pipeline is blocked with upper chamber of air cylinder 7,2 mouthfuls of the first Pneumatic valve 9 and 3 mouthfuls of connection, operates source of the gas from air accumulator 17 through Large Copacity
(maximum output capacity is 30M3/ h) air filtration air relief valve 21 by the first Pneumatic valve 9, be directly inputted into upper chamber of air cylinder 7, gas
The air pressure of cylinder cavity of resorption 4 is protected position valve 31 to the 4th Pneumatic valve 30 through second and is directly vented, it is achieved accident conditions lower valve quick closedown.
Under the accident conditions in source of dying or when bleed pressure value is less than air filtration decompressor 14 setting value, control device
In the second Pneumatic valve the 13, the 3rd Pneumatic valve 28, second protect position valve 31, signal source of the gas out of hand.Second protects position valve 31 locking,
Electropneumatic valve positioner 29 inputs (output) pipeline and is blocked with lower chamber of air cylinder 4,2 mouthfuls of the 3rd Pneumatic valve 28 and 3 mouthfuls of connections, behaviour
Through Large Copacity, (maximum output capacity is 30M from air accumulator 17 to make source of the gas3/ h) air filtration air relief valve 21 is by the 3rd Pneumatic valve
28, it is directly inputted into lower chamber of air cylinder 4, the air pressure of upper chamber of air cylinder 7 is protected position valve 8 to the second Pneumatic valve 13 through first and is directly vented, real
Existing accident conditions lower valve is quickly opened.
Although this utility model discloses as above with preferred embodiment, so it is not limited to this utility model, any
Those skilled in the art, without departing from spirit and scope of the present utility model, when a little amendment and perfect can be made, therefore this
The protection domain of utility model is when with being as the criterion that claims are defined.
Claims (4)
1. the control device for Pneumatic piston actuator, it is characterised in that include on lower chamber of air cylinder (4), cylinder
Chamber (7), actuator (5), feedback device (2) and the air accumulator (17) for actuator (5) offer reset source of the gas, described storage
Gas tank (17) connects lower chamber of air cylinder (4) by the 3rd Pneumatic valve (28), sets between described lower chamber of air cylinder (4) and upper chamber of air cylinder (7)
Having piston (6), described piston (6) connects electropneumatic valve positioner (29) and valve (1) by feedback device (2), described electrically
Position valve is protected by the second Pneumatic valve (13) and first in first outlet side (25) of valve positioner (29), the second outlet side (26)
(8) being connected with upper chamber of air cylinder (7), the inlet end (24) of described electropneumatic valve positioner (29) passes sequentially through the 4th Pneumatic valve
(30), second protect position valve (31) and be connected with lower chamber of air cylinder (4), described first guarantor position valve (8) and the control of the 4th Pneumatic valve (30)
End is connected with electromagnetic valve (11).
Control device for Pneumatic piston actuator the most according to claim 1, it is characterised in that described gas storage
Tank (17) is connected with second outlet side (26) of electropneumatic valve positioner (29) by check valve (19), and described air accumulator (17) leads to
Cross the first Pneumatic valve (9) to be connected with upper chamber of air cylinder (7).
Control device for Pneumatic piston actuator the most according to claim 2, it is characterised in that described first
Pneumatic valve (9), the second Pneumatic valve (13), the 3rd Pneumatic valve (28) and the 4th Pneumatic valve (30) are two-position three-way, and
Fully open position it is in when source of the gas breaks down.
Control device for Pneumatic piston actuator the most according to claim 1, it is characterised in that described electromagnetism
Valve (11) is two-position three way magnetic valve, and is in closed positions when power failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620831967.9U CN205877369U (en) | 2016-08-03 | 2016-08-03 | A controlling means for air piston formula actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620831967.9U CN205877369U (en) | 2016-08-03 | 2016-08-03 | A controlling means for air piston formula actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205877369U true CN205877369U (en) | 2017-01-11 |
Family
ID=57701663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620831967.9U Active CN205877369U (en) | 2016-08-03 | 2016-08-03 | A controlling means for air piston formula actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205877369U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051281A (en) * | 2016-08-03 | 2016-10-26 | 上海核阀门制造有限公司 | Control device for pneumatic piston type executing mechanism |
| CN113236848A (en) * | 2021-06-03 | 2021-08-10 | 浙江中德自控科技股份有限公司 | Valve control system capable of automatically cutting off air source fault |
-
2016
- 2016-08-03 CN CN201620831967.9U patent/CN205877369U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051281A (en) * | 2016-08-03 | 2016-10-26 | 上海核阀门制造有限公司 | Control device for pneumatic piston type executing mechanism |
| CN113236848A (en) * | 2021-06-03 | 2021-08-10 | 浙江中德自控科技股份有限公司 | Valve control system capable of automatically cutting off air source fault |
| CN113236848B (en) * | 2021-06-03 | 2023-05-26 | 浙江中德自控科技股份有限公司 | Valve control system for automatic cutting off of air source fault |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205877368U (en) | Two effect execution control mechanisms of air piston formula | |
| CN103629421A (en) | Valve control system | |
| CN205877369U (en) | A controlling means for air piston formula actuating mechanism | |
| CN103925260B (en) | A kind of safety valve test system | |
| CN202348624U (en) | Single-action pneumatic anti-surge adjusting valve | |
| CN105134684B (en) | Logic oil duct control system with electromagnetic switch valves and failure autodiagnosis method | |
| KR20150066250A (en) | Digital Full automatic valve cross-over and controlling system for apparatus of supplying the high pressure gas for industry | |
| CN106051281A (en) | Control device for pneumatic piston type executing mechanism | |
| CN202971419U (en) | Hydraulic control system with safety protection for hydraulic machine tool | |
| CN209354734U (en) | pneumatic valve pneumatic system | |
| CN105020207B (en) | Dual redundant regulator with emergency decompression | |
| CN110593965A (en) | Main valve shutoff valve group, control method thereof and steam turbine | |
| CN103438038B (en) | Thermal deburring bed hydraulic system and controlling method thereof | |
| CN111075789B (en) | Hydraulic protection device with redundant electrohydraulic servo control system | |
| CN212031995U (en) | Flash evaporation gas recovery integrated device | |
| CN101658926B (en) | Hydraulic control system of tundish water gap of continuous casting machine | |
| CN212203273U (en) | Pilot-operated safety valve of voltage stabilizer of nuclear power station | |
| CN103899829B (en) | A kind of double-action Pneumatic actuator with adjustment and failure safe function | |
| CN209800394U (en) | differential hydraulic control loop of hydraulic control gate valve and hydraulic system applying differential hydraulic control loop | |
| CN103335158A (en) | Volumetric type electricity-free fast switching electro-hydraulic device capable of controlling multiple valves with one device | |
| CN111322451B (en) | Gas-liquid linkage actuating mechanism | |
| CN109236803B (en) | Hydraulic system with redundancy protection function | |
| CN203939494U (en) | Drilling tool well head security protection and control device | |
| CN111365502A (en) | Pilot-operated safety valve of voltage stabilizer of nuclear power station | |
| CN107806526A (en) | A kind of pneumatic operated valve control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201800 Shanghai Bao Qian Road, Lane 5888, Lane 8, No. Patentee after: Shanghai nuclear valve Limited by Share Ltd Address before: 201800 Shanghai Bao Qian Road, Lane 5888, Lane 8, No. Patentee before: Shanghai EHO Valve Manufacturing Co.,Ltd. |