CN103335113A - Latch-up protection device for electro-pneumatic valve positioner - Google Patents
Latch-up protection device for electro-pneumatic valve positioner Download PDFInfo
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- CN103335113A CN103335113A CN 201310233500 CN201310233500A CN103335113A CN 103335113 A CN103335113 A CN 103335113A CN 201310233500 CN201310233500 CN 201310233500 CN 201310233500 A CN201310233500 A CN 201310233500A CN 103335113 A CN103335113 A CN 103335113A
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- latch
- valve body
- transfer passage
- protection device
- bin
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Abstract
The invention discloses a latch-up protection device for an electro-pneumatic valve positioner. The latch-up protection device comprises a valve body, wherein the valve body is provided with an input port and an output port, and a transfer passage between the input port and the output port is opened and closed through a valve core; the valve body is divided into a voltage-regulating bin, an intermediate bin and a control bin through an upper membrane and a lower membrane; a control rod penetrates the bottom of the control bin and extends into the transfer passage, the top end of the control rod is connected with the lower membrane, and the bottom end of the control rod is connected with the valve core; the control bin and the transfer passage are closed by a seal ring; a compression spring of which the bottom end is connected with the upper membrane is vertically arranged in the voltage-regulating bin; the input port is communicated with the intermediate bin through a gas delivery passage arranged in the valve body. The latch-up protection device for the electro-pneumatic valve positioner has a simple structure, and performs the latch-up protection function to a gas delivery pipeline.
Description
Technical field
The present invention relates to electropneumatic valve positioner latch-up protection device.
Background technique
When the instrument air system breaks down; lock-up valve can cut off the passage of regulator and valve automatically; make valve remain on the origin-location; to guarantee normally carrying out of manufacturing process; after air failure is eliminated; recover proper functioning; lock-up valve is applicable in the important automatic control loop as safety protection device; and present on the market lock-up valve; it is not ideal enough that its structure arranges, and the effect of playing is stable inadequately, and effect is obvious inadequately; can't well guarantee normally carrying out of manufacturing process, important automatic control loop is not had good safety protection.
Summary of the invention
The object of the present invention is to provide a kind of electropneumatic valve positioner latch-up protection device, it is simple in structure, can play the effect of latch-up protection to air delivering pipeline.
For achieving the above object, technological scheme of the present invention is a kind of electropneumatic valve positioner of design latch-up protection device, comprises valve body, and valve body is provided with inlet opening and delivery outlet, and the transfer passage between inlet opening and delivery outlet opens and closes by spool; Valve body is partitioned into pressure regulating chamber, intermediate bin and control storehouse by diaphragm up and down; One controlling rod runs through bottom, control storehouse and stretches into transfer passage, and the controlling rod top is connected with following diaphragm, and the controlling rod bottom is connected with spool; Control storehouse and transfer passage come airtight by seal ring; Be provided with the perpendicular compression spring of putting in the pressure regulating chamber, the bottom of compression spring is connected with upper diaphragm; The inlet opening connects by interior gas distribution channel and the intermediate bin of being located at valve body.
Advantage of the present invention and beneficial effect are: a kind of electropneumatic valve positioner latch-up protection device is provided, and it is simple in structure, can play the effect of latch-up protection to air delivering pipeline.
The source of the gas signal is imported from the inlet opening, and enter intermediate bin by gas distribution channel, and because promoting upper diaphragm, compressed-air actuated effect moves up, pressurized air is depressed down diaphragm simultaneously, push lever is opened spool, and the transfer passage between inlet opening and delivery outlet forms path like this.After the Signal Compression air cuts off; because the Signal Compression air is released the pressure of following diaphragm; the Returnning spring at spool place makes valve core reset; transfer passage between inlet opening and delivery outlet opens circuit; by above setting, make that the internal structure setting of lock-up valve is more reasonable, the function of product is more reliable; can better guarantee normally carrying out of technological process, control loop is had a good safety protection effect.
Description of drawings
Fig. 1 is schematic representation of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described.Following examples only are used for technological scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
The concrete technological scheme of implementing of the present invention is:
As shown in Figure 1, a kind of electropneumatic valve positioner latch-up protection device comprises valve body 1, and valve body 1 is provided with inlet opening 2 and delivery outlet 3, and the transfer passage 14 that inlet opening 2 and delivery outlet are 3 opens and closes by spool 4; Valve body 1 is partitioned into pressure regulating chamber 5, intermediate bin 6 and control storehouse 7 by diaphragm up and down; One controlling rod 8 runs through control 7 bottoms, storehouse and stretches into transfer passage 14, and controlling rod 8 tops are connected with following diaphragm 9, and controlling rod 8 bottoms are connected with spool 4; Control storehouse 7 is airtight by seal ring 10 with transfer passage 14; Be provided with the perpendicular compression spring of putting 11 in the pressure regulating chamber 5, the bottom of compression spring 11 is connected with upper diaphragm 12; Inlet opening 2 connects with intermediate bin 6 by the interior gas distribution channel 13 of being located at valve body 1.
The source of the gas signal is 2 inputs from the inlet opening, and enter intermediate bin 6 by gas distribution channel 13, and because promoting upper diaphragm 12, compressed-air actuated effect moves up, pressurized air is depressed down diaphragm 9 simultaneously, push lever 8 is opened spool 4, and the transfer passage 14 of 3 of inlet opening 2 and delivery outlets forms paths like this.After the Signal Compression air cuts off; because the Signal Compression air is released the pressure of following diaphragm 9; the Returnning spring at spool 4 places resets spool 4; the transfer passage 14 that inlet opening 2 and delivery outlet are 3 opens circuit; by above setting, make that the internal structure setting of lock-up valve is more reasonable, the function of product is more reliable; can better guarantee normally carrying out of technological process, control loop is had a good safety protection effect.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. electropneumatic valve positioner latch-up protection device is characterized in that, comprises valve body, and valve body is provided with inlet opening and delivery outlet, and the transfer passage between inlet opening and delivery outlet opens and closes by spool; Valve body is partitioned into pressure regulating chamber, intermediate bin and control storehouse by diaphragm up and down; One controlling rod runs through bottom, control storehouse and stretches into transfer passage, and the controlling rod top is connected with following diaphragm, and the controlling rod bottom is connected with spool; Control storehouse and transfer passage come airtight by seal ring; Be provided with the perpendicular compression spring of putting in the pressure regulating chamber, the bottom of compression spring is connected with upper diaphragm; The inlet opening connects by interior gas distribution channel and the intermediate bin of being located at valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310233500 CN103335113A (en) | 2013-06-13 | 2013-06-13 | Latch-up protection device for electro-pneumatic valve positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310233500 CN103335113A (en) | 2013-06-13 | 2013-06-13 | Latch-up protection device for electro-pneumatic valve positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103335113A true CN103335113A (en) | 2013-10-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310233500 Pending CN103335113A (en) | 2013-06-13 | 2013-06-13 | Latch-up protection device for electro-pneumatic valve positioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103335113A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595374A (en) * | 2019-01-14 | 2019-04-09 | 中国长江电力股份有限公司 | A kind of double membrane configurations hold pressure pressure release control pilot valve and control method |
-
2013
- 2013-06-13 CN CN 201310233500 patent/CN103335113A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109595374A (en) * | 2019-01-14 | 2019-04-09 | 中国长江电力股份有限公司 | A kind of double membrane configurations hold pressure pressure release control pilot valve and control method |
| CN109595374B (en) * | 2019-01-14 | 2024-05-10 | 中国长江电力股份有限公司 | Pressure-holding pressure-releasing control pilot valve with double-diaphragm structure and control method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131002 |