CN202203487U - 361 valve and high-low bypass valve pneumatic control system for thermal power station - Google Patents
361 valve and high-low bypass valve pneumatic control system for thermal power station Download PDFInfo
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- CN202203487U CN202203487U CN2011203051168U CN201120305116U CN202203487U CN 202203487 U CN202203487 U CN 202203487U CN 2011203051168 U CN2011203051168 U CN 2011203051168U CN 201120305116 U CN201120305116 U CN 201120305116U CN 202203487 U CN202203487 U CN 202203487U
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- thermal power
- pneumatic
- bypass valve
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Abstract
The utility model relates to a 361 valve and high-low bypass valve pneumatic control system for a thermal power station. A position detection device for detecting the actual opening and closing degree of a pneumatic executer is arranged on the pneumatic executer, and in addition, two control branches in mutually parallel connection are arranged between a system air inlet and the pneumatic executer, wherein a switch electromagnetic valve for controlling the pneumatic executer to operate is arranged the first control branch, a pressure reducing valve, a switching electromagnetic valve, a positioning device and a flow rate amplifier are serially connected onto the second control branch, and the positioning device is used for precisely regulating the pneumatic executer. The 361 valve and high-low bypass valve pneumatic control system for the thermal power station has the advantages that the original control principle and the system are modified, so the equipment control precision is effectively improved, the potential safety hazard is reduced, the operation of the whole system is more favorably realized, and the 361 valve and high-low bypass valve pneumatic control system is suitable for being popularized and applied.
Description
Technical field
The utility model relates to a kind of valve control system that is applied to the thermal power plant, particularly relates to a kind of thermal power plant 361 valves and hp and lp bypass valve atmospheric control.
Background technique
Thermal power plant 361 valves and hp and lp bypass pneumatic valve are carried out more accurate and reliable adjusting control, and equipment operation and safety in production when shutdown is played in the thermal power plant have great importance.Domestic thermal power plant is now employed 361, the hp and lp bypass air control unit be imported product abroad such as STI, CCI mostly; The all devices component all are installed on the valve; Valve is most here only uses when boiler starting and stopping machine; And pipe vibration is very big, so just makes the pneumatic equipment that is installed on the valve be easy to occur connecting become flexible situation such as precision equipment damage such as positioning work piece.Thereby the precision of control is regulated in influence, and influences normally carrying out of starting and stopping machine, can damage visual plants such as steam turbine when serious.Not only very big loss can be caused, and the Security of complete equipment can be influenced.
This shows that above-mentioned existing thermal power plant 361 valves and hp and lp bypass valve control system obviously still have inconvenience and defective, and demand urgently further improving in structure and use.How to found a kind of validity that can effectively improve Equipment Control, reduce thermal power plant 361 valves and the hp and lp bypass valve atmospheric control of the new structure of potential safety hazard, one of real important improvement target that belongs to current related domain.
The model utility content
The technical problem that the utility model will solve provides a kind of thermal power plant 361 valves and hp and lp bypass valve atmospheric control; Make it can improve the validity of control; The normal operation of assurance equipment; Can improve the Security of whole system operation again, thereby overcome the deficiency of existing control system.
For solving the problems of the technologies described above; The utility model a kind of thermal power plant 361 valves and hp and lp bypass valve atmospheric control; Pneumatic actuator is provided with the position detector that detects pneumatic actuator actual switch degree; And between system's suction port and pneumatic actuator, be provided with two control branch roads parallel with one another, wherein: article one control branch road is provided with the switch electromagnetic valve of control pneumatic actuator operation; The positioning work piece and the flow amplifier that are serially connected with reduction valve, switching solenoid valve and are used for accurately regulating pneumatic actuator on the second control branch road.
As a kind of improvement of the utility model, described second is controlled on the branch road, also is provided with filter in suction port the place ahead of reduction valve.
Described switch electromagnetic valve, positioning work piece, filter, reduction valve, switching solenoid valve and flow amplifier are installed in the control box.
Described position detector is the contactless position feedback means.
Described switch electromagnetic valve is for change up the pass solenoid valve soon.
Describedly change up soon that to close solenoid valve be the middle envelope formula solenoid valve of five threeways.
After adopting such structure; The utility model thermal power plant 361 valves and hp and lp bypass valve atmospheric control; Original control principle and system are transformed, thereby effectively improved the validity of Equipment Control, reduced potential safety hazard; Be more conducive to the operation of whole system, be suitable for promoting the use of.
Description of drawings
Above-mentioned only is the general introduction of the utility model technological scheme, in order more to know the technological means of understanding the utility model, below in conjunction with accompanying drawing and embodiment the utility model is done further to specify.
Fig. 1 is the connection schematic representation of the utility model thermal power plant 361 valves and hp and lp bypass valve atmospheric control.
Embodiment
See also shown in Figure 1; The utility model thermal power plant 361 valves and hp and lp bypass valve atmospheric control; Be on pneumatic actuator 8, to have set up to detect the position detector 7 of pneumatic actuator 8 actual switch degree, and between system's suction port and pneumatic actuator 8, be provided with two control branch roads parallel with one another.
Wherein, article one control branch road is provided with the switch electromagnetic valve 1 of direct control pneumatic actuator 8 operations.Switch electromagnetic valve 1 is preferably and changes up the pass solenoid valve soon, for example adopts the middle envelope formula solenoid valve of five threeways.
The positioning work piece 2 and the flow amplifier 6 that are serially connected with reduction valve 4, switching solenoid valve 5 and are used for accurately regulating pneumatic actuator 8 on the second control branch road.In addition, also can also be provided with filter 3 in suction port the place ahead of reduction valve 4.
Preferable; Position detector 7 adopts the contactless position feedback means; And switch electromagnetic valve 1, positioning work piece 2, filter 3, reduction valve 4, switching solenoid valve 5 and flow amplifier 6 be installed in the control box, be fixed on and be convenient to operation, environmental conditions position preferably.
During use, source of the gas is divided into two-way after getting into control box: one tunnel supply changes up soon closes solenoid valve 1, in order to realize the control of valve snap switch; Another road gives positioning work piece 2 air feed in order to realize the adjusting control of valve through reduction valve 4 and switching solenoid valve 5.
Whole system is to the requirement of 361 valves and high and low pressure bypass during because of boiler starting and stopping machine; Valve control need have following function: switching solenoid valve 5 is not charged when normally using; Gas circuit is positioning work piece 2 air feed through switching ground magnet valve 5, supplies the switch of 2 pairs of valves of 4-20mA signal framing device to carry out analog amount through DCS and regulates; In special circumstances, need to turn-off fast like valve, the corresponding coil of switch electromagnetic valve 1 is simultaneously charged with switching solenoid valve 5 when opening fast, thereby cuts off the positioning work piece source of the gas, to valve open soon, quick closing valve controls.
The utility model is installed former positioning work piece on the valve actuator, solenoid valve, filter etc. of being installed on concentratedly in control box, is placed in the good relatively position of working environment.Valve actuator on equipped with non-contact position feedback device, thus make the main environment that reaches precision equipment away from the high vibrations of on-the-spot high temperature, equipment is played great protective action, prolong the physical life of equipment.While is very little because of the influence that the apparatus in comparison in employed contactless position feedback means of the utility model and the existing generally use is shaken, and can effectively improve the control accuracy of whole system.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in the protection domain of the utility model.
Claims (6)
1. thermal power plant 361 valves and hp and lp bypass valve atmospheric control; It is characterized in that pneumatic actuator is provided with the position detector that detects pneumatic actuator actual switch degree; And between system's suction port and pneumatic actuator, be provided with two control branch roads parallel with one another, wherein:
Article one, the control branch road is provided with the switch electromagnetic valve of control pneumatic actuator operation;
The positioning work piece and the flow amplifier that are serially connected with reduction valve, switching solenoid valve and are used for accurately regulating pneumatic actuator on the second control branch road.
2. thermal power plant according to claim 1 361 valves and hp and lp bypass valve atmospheric control is characterized in that on the described second control branch road, also are provided with filter in suction port the place ahead of reduction valve.
3. thermal power plant according to claim 2 361 valves and hp and lp bypass valve atmospheric control is characterized in that described switch electromagnetic valve, positioning work piece, filter, reduction valve, switching solenoid valve and flow amplifier are installed in the control box.
4. thermal power plant according to claim 1 361 valves and hp and lp bypass valve atmospheric control is characterized in that described position detector is the contactless position feedback means.
5. thermal power plant according to claim 1 361 valves and hp and lp bypass valve atmospheric control is characterized in that described switch electromagnetic valve is for change up the pass solenoid valve soon.
6. thermal power plant according to claim 5 361 valves and hp and lp bypass valve atmospheric control is characterized in that describedly changing up soon that to close solenoid valve be the middle envelope formula solenoid valve of five threeways.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203051168U CN202203487U (en) | 2011-08-19 | 2011-08-19 | 361 valve and high-low bypass valve pneumatic control system for thermal power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203051168U CN202203487U (en) | 2011-08-19 | 2011-08-19 | 361 valve and high-low bypass valve pneumatic control system for thermal power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202203487U true CN202203487U (en) | 2012-04-25 |
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ID=45967608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203051168U Expired - Lifetime CN202203487U (en) | 2011-08-19 | 2011-08-19 | 361 valve and high-low bypass valve pneumatic control system for thermal power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202203487U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954810A (en) * | 2012-09-28 | 2013-03-06 | 济南夫驰科技有限公司 | High/low-pressure air circuit system for test bed |
| CN104728824A (en) * | 2015-03-20 | 2015-06-24 | 国投钦州发电有限公司 | Thermal power plant once-through boiler water drainage system having bypass differential pressure discharge function |
| CN106753587A (en) * | 2016-12-23 | 2017-05-31 | 安徽六国化工股份有限公司 | A kind of mistake gas shielded gas circuit of gasification furnace inlet regulating valve |
| CN115263445A (en) * | 2022-08-09 | 2022-11-01 | 中广核工程有限公司 | Method for controlling action of bypass regulating valve of steam turbine |
-
2011
- 2011-08-19 CN CN2011203051168U patent/CN202203487U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954810A (en) * | 2012-09-28 | 2013-03-06 | 济南夫驰科技有限公司 | High/low-pressure air circuit system for test bed |
| CN102954810B (en) * | 2012-09-28 | 2015-09-30 | 济南夫驰科技有限公司 | Detect test stand high-low pressure air-channel system |
| CN104728824A (en) * | 2015-03-20 | 2015-06-24 | 国投钦州发电有限公司 | Thermal power plant once-through boiler water drainage system having bypass differential pressure discharge function |
| CN106753587A (en) * | 2016-12-23 | 2017-05-31 | 安徽六国化工股份有限公司 | A kind of mistake gas shielded gas circuit of gasification furnace inlet regulating valve |
| CN115263445A (en) * | 2022-08-09 | 2022-11-01 | 中广核工程有限公司 | Method for controlling action of bypass regulating valve of steam turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Zigang Inventor after: Wang Hui Inventor after: Di Daqun Inventor after: Yang Xiaoyi Inventor before: Zhao Zigang Inventor before: Wang Hui Inventor before: Di Daqun |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120425 |