CN216844143U - Electromagnetic valve control system for ESD valve of gas pressure regulating station of gas power plant - Google Patents
Electromagnetic valve control system for ESD valve of gas pressure regulating station of gas power plant Download PDFInfo
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- CN216844143U CN216844143U CN202122646142.3U CN202122646142U CN216844143U CN 216844143 U CN216844143 U CN 216844143U CN 202122646142 U CN202122646142 U CN 202122646142U CN 216844143 U CN216844143 U CN 216844143U
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Abstract
The utility model discloses an electromagnetic valve control system for an ESD valve of a gas pressure regulating station of a gas power plant, which comprises a natural gas emergency cut-off ESD valve, a two-position five-way pneumatic control valve, a one-position two-way three-way electromagnetic valve, a two-position two-way three-way electromagnetic valve, a local manual emergency cut-off button, a DCS (distributed control system), a 24VDC (direct current) power module, a local control box and a pressure regulating station control cabinet. By adding the on-site electromagnetic valve protection box, the utility model is convenient for maintaining the electromagnetic valve, prolongs the service life of the electromagnetic valve, reduces the ignition risk of an electric control loop to natural gas and improves the safety and reliability of the electromagnetic valve; by additionally arranging an on-site manual emergency shut-off button, the natural gas source can be shut off on site in an emergency; by adopting UPS power supplies from different units and 2 independent 24VDC power supply modules, the reliability of the electromagnetic valve control power supply is ensured; the control circuit has the advantages of reasonable design, simple structure of the control circuit and high safety and reliability.
Description
Technical Field
The utility model relates to an electromagnetic valve control system for an ESD valve of a gas pressure regulating station of a gas power plant, belonging to the technical field of control of the gas power plant.
Background
The pressure regulating station is a first-stage area where the gas enters the gas turbine power plant, on one hand, the pressure of the natural gas is regulated through links such as filtering, heating, pressure reduction (or pressurization), metering, component analysis and the like so as to adapt to the requirements of a gas generator and ensure the stable operation of a unit; on the other hand, when the natural gas leaks or is in emergency such as fire alarm, the ESD valve of the natural gas shutoff valve at the inlet of the pressure regulating station is closed, and the natural gas is cut off emergently, so that the safety of the gas power plant is ensured. At present, the control mode of most of gas power plant ESD valves is mainly to adopt a double-electromagnetic-valve loop to control the ESD valve, so that the risks that the ESD valve is mistakenly closed and a generator set stops once a single control electromagnetic valve and a single power supply loop lose power are overcome.
Chinese utility model with publication number CN 205654945U discloses "an ESD valve driving device" exclusively for 2016, 10, 19, and adopts a dual power supply control solenoid valve, thereby preventing the risk of sudden closing of the ESD valve after the single power supply is lost. The Chinese utility model with the bulletin number of CN 206861254U discloses a reliable ESD valve control loop in 2018, 1, 9, adopts two sets of solenoid valves to form a series-parallel connection, and each solenoid valve is independently powered, so that the ESD valve is prevented from being mistakenly closed. The Chinese utility model with the publication number of CN 212080872U discloses a valve bank for a pressure regulating station based on an ESD valve, which is specially favorable for 2020, 12, 4.A series-parallel connection of two electromagnetic valves is adopted in the ESD valve bank and a pneumatic valve bank, so that the regular switching can be carried out in a stable failure period, the electromagnetic valve is prevented from being seriously worn due to the long-term electrification of the electromagnetic valve, and the service life of the electromagnetic valve is prolonged; meanwhile, the problem that the single electromagnetic valve fails to cause the valve to be closed by mistake is avoided. The Chinese invention patent with application number CN 113027848A discloses a high-reliability electromagnetic valve control system in 25/6/2021, and aims at the scene of valve protection closing by adopting parallel connection of double electromagnetic valves and series connection of double valves; aiming at the scene of valve protection opening, double electromagnetic valves are connected in series and double valves are connected in parallel; compared with a single electromagnetic valve control loop, the system misoperation risk is reduced, compared with a double electromagnetic control loop, the system misoperation risk is reduced, and the system reliability is improved.
The above-mentioned techniques do not solve the problems of short service life, safety, no emergency valve-closing operation means, unreliable control power source, non-redundancy control loop and the like caused by outdoor arrangement of the electromagnetic valve, and have potential safety hazards.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides the electromagnetic valve control system for the ESD valve of the gas pressure regulating station of the gas power plant, which has the advantages of reasonable design, simple control loop structure and high safety and reliability.
The technical scheme adopted by the utility model for solving the problems is as follows: a solenoid valve control system for an ESD valve of a gas pressure regulating station of a gas power plant is characterized by comprising a natural gas emergency cut-off ESD valve, a two-position five-way pneumatic control valve, a first two-position three-way solenoid valve, a second two-position three-way solenoid valve, an on-site manual emergency cut-off button, a DCS, a 24VDC power supply module, an on-site control box and a pressure regulating station control cabinet; the natural gas emergency cut-off ESD valve is a cylinder piston type pneumatic actuating mechanism and is connected with the air outlet of the two-position five-way pneumatic control valve, the air inlet of the two-position five-way air control valve is connected with the air outlet of the first two-position three-way electromagnetic valve, 2 air inlets of the first two-position three-way electromagnetic valve are respectively connected with the compressed air pipeline and the air outlet of the second two-position three-way electromagnetic valve, an air inlet of the second two-position three-way electromagnetic valve is connected with a compressed air pipeline, control coils of the first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve are both connected with a normally closed contact of an in-place manual emergency cut-off button, the other end of the normally closed contact of the in-situ manual emergency cut-off button is connected with the signal output contact end of the DCS, the signal input contact terminal of the DCS system is connected with the output terminal of the 24VDC power supply module, the 220VDC input ends of the 24VDC power supply modules are respectively connected with 2 UPS power supplies; the first two-position three-way electromagnetic valve, the second two-position three-way electromagnetic valve and the local manual emergency cut-off button are arranged in a local control box, and the local control box is arranged adjacent to the natural gas emergency cut-off ESD valve; the 24VDC power supply module and the DCS are installed in a control cabinet of the pressure regulating station, and the control cabinet of the pressure regulating station is arranged in a control booth of the natural gas pressure regulating station.
Furthermore, the local control box adopts an explosion-proof box with high protection level, the box door can be opened, and a control panel is arranged in the box door and used for installing the local manual emergency cut-off button; the first two-position three-way electromagnetic valve is connected with the two-position five-way pneumatic control valve through a rubber hose.
Further, the natural gas emergency cut-off ESD valve is a pneumatic actuator and is controlled to be opened and closed by the two-position five-way pneumatic control valve; when the cylinder of the natural gas emergency cut-off ESD valve is used for air intake, the natural gas emergency cut-off ESD valve is opened, and when the cylinder of the natural gas emergency cut-off ESD valve is used for air exhaust, the natural gas emergency cut-off ESD valve is closed under the action of a spring connected with a cylinder piston of the natural gas emergency cut-off ESD valve.
Further, the first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve are connected in a series-parallel connection mode; when the first two-position three-way electromagnetic valve is electrified, the first two-position three-way electromagnetic valve is opened, a compressed air source enters the two-position five-way air control valve through the first two-position three-way electromagnetic valve, the two-position five-way air control valve is opened under the action of an external air source, the compressed air source enters a cylinder of the natural gas emergency cut-off ESD valve to compress a spring on the cylinder, and the natural gas emergency cut-off ESD valve is opened; when the first two-position three-way solenoid valve is not electrified and the second two-position three-way solenoid valve is electrified, the compressed air source enters the two-position five-way air control valve through another air inlet of the first two-position three-way solenoid valve after passing through the second two-position three-way solenoid valve, the two-position five-way air control valve is opened, the compressed air source enters the cylinder of the natural gas emergency cut-off ESD valve, and the natural gas emergency cut-off ESD valve is opened. To sum up: when any one of the first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve is electrified, the natural gas emergency cut-off ESD valve is opened; when the first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve are both powered off, the natural gas emergency cut-off ESD valve is closed.
Further, the UPS power inputs of the 24VDC power modules are respectively taken from the electrical dc systems of the 2 different sets of units.
Furthermore, a control power supply of the first two-position three-way electromagnetic valve and the second two-position three-way electromagnetic valve is input to a contact of a 24VDC power supply module to a DCS system and then to a normally closed contact of a local manual emergency cut-off button, and completely independent channels are adopted, so that the reliable redundancy of the control power supply of the two-position three-way electromagnetic valve is ensured.
Furthermore, the normally closed contacts of the on-site manual emergency cut-off button are respectively connected in series with the (+) end and the (-) end of the 24VDC power circuit, so that when the on-site manual emergency cut-off button is pressed, the (+) end and the (-) end of the 24VDC power circuit are effectively disconnected, and the natural gas emergency cut-off ESD valve is cut off emergently.
Compared with the prior art, the utility model has the following advantages and effects:
1. by adding the on-site electromagnetic valve protection box, the maintenance of the electromagnetic valve is facilitated, the service life of the electromagnetic valve is prolonged, the ignition risk of an electric control loop to natural gas is reduced, and the safety and reliability of the electromagnetic valve are improved;
2. by additionally arranging an on-site manual emergency shut-off button, the natural gas source can be shut off on site in an emergency;
3. By adopting UPS power supplies from different units and 2 independent 24VDC power supply modules, the reliability of the electromagnetic valve control power supply is ensured;
the utility model has the advantages of reasonable design, simple control loop structure and high safety and reliability.
Drawings
Fig. 1 is a schematic structural diagram of a control system in the present invention.
In the figure: the natural gas emergency cut-off system comprises a natural gas emergency cut-off ESD valve 1, a two-position five-way air control valve 2, a first two-position three-way electromagnetic valve 3, a second two-position three-way electromagnetic valve 4, a local manual emergency cut-off button 5, a DCS system 6, a 24VDC power supply module 7, a local control box 8 and a pressure regulating station control cabinet 9.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1, in this embodiment, an electromagnetic valve control system for an ESD valve of a gas pressure regulating station of a gas power plant includes a natural gas emergency shutdown ESD valve 1, a two-position five-way gas control valve 2, a first two-position three-way electromagnetic valve 3, a second two-position three-way electromagnetic valve 4, an on-site manual emergency shutdown button 5, a DCS system 6, a 24VDC power module 7, an on-site control box 8, and a pressure regulating station control cabinet 9; the natural gas emergency cut-off ESD valve 1 is a cylinder piston type pneumatic actuator and is connected with an air outlet of a two-position five-way pneumatic control valve 2, an air inlet of the two-position five-way pneumatic control valve 2 is connected with an air outlet of a first two-position three-way electromagnetic valve 3, 2 air inlets of the first two-position three-way electromagnetic valve 3 are respectively connected with a compressed air pipeline and an air outlet of a second two-position three-way electromagnetic valve 4, an air inlet of the second two-position three-way electromagnetic valve 4 is connected with a compressed air pipeline, control coils of the first two-position three-way electromagnetic valve 3 and the second two-position three-way electromagnetic valve 4 are connected with a normally closed contact of an in-situ manual emergency cut-off button 5, the other end of the normally closed contact of the in-situ manual emergency cut-off button 5 is connected with a signal output contact end of a DCS system 6, a signal input contact end of the DCS system 6 is connected with an output end of a 24VDC power supply module 7, and a 220VDC input end of the 24VDC power supply module 7 is respectively connected with a 2-way UPS; the first two-position three-way electromagnetic valve 3, the second two-position three-way electromagnetic valve 4 and the local manual emergency cut-off button 5 are arranged in a local control box 8, and the local control box 8 is arranged adjacent to the natural gas emergency cut-off ESD valve 1; the 24VDC power supply module 7 and the DCS system 6 are installed in a voltage regulation station control cabinet 9, and the voltage regulation station control cabinet 9 is arranged in a control booth of the natural gas voltage regulation station.
Specifically, the local control box 8 is an explosion-proof box with high protection level, the box door can be opened, and a control panel is arranged in the box door and used for installing the local manual emergency cut-off button 5; the first two-position three-way electromagnetic valve 3 is connected with the two-position five-way pneumatic control valve 2 through a rubber hose.
Specifically, the natural gas emergency cut-off ESD valve 1 is a pneumatic actuator and is controlled to be opened and closed by a two-position five-way pneumatic control valve 2; when the cylinder of the natural gas emergency shutdown ESD valve 1 is charged, the natural gas emergency shutdown ESD valve 1 is opened, and when the cylinder of the natural gas emergency shutdown ESD valve 1 is discharged, the natural gas emergency shutdown ESD valve 1 is closed under the action of a spring connected to the cylinder piston of the natural gas emergency shutdown ESD valve 1.
Specifically, the first two-position three-way electromagnetic valve 3 and the second two-position three-way electromagnetic valve 4 are connected in series and parallel; when the first two-position three-way electromagnetic valve 3 is electrified, the first two-position three-way electromagnetic valve 3 is opened, a compressed air source enters the two-position five-way air control valve 2 through the first two-position three-way electromagnetic valve 3, the two-position five-way air control valve 2 is opened under the action of an external air source, the compressed air source enters a cylinder of the natural gas emergency cut-off ESD valve 1 to compress a spring on the cylinder, and the natural gas emergency cut-off ESD valve 1 is opened; when the first two-position three-way electromagnetic valve 3 is not electrified and the second two-position three-way electromagnetic valve 4 is electrified, a compressed air source passes through the second two-position three-way electromagnetic valve 4 and then enters the second five-way pneumatic control valve 2 through the other air inlet of the first two-position three-way electromagnetic valve 3, the second five-way pneumatic control valve 2 is opened, the compressed air source enters the cylinder of the natural gas emergency cut-off ESD valve 1, and the natural gas emergency cut-off ESD valve 1 is opened. To sum up: when any one of the first two-position three-way electromagnetic valve 3 and the second two-position three-way electromagnetic valve 4 is electrified, the natural gas emergency cut-off ESD valve 1 is opened; when the first two-position three-way electromagnetic valve 3 and the second two-position three-way electromagnetic valve 4 are both powered off, the natural gas emergency cut-off ESD valve 1 is closed.
Specifically, the UPS power inputs of the 24VDC power modules 7 are taken from the electrical dc systems of the 2 different units, respectively.
Specifically, the control power supply of the first two-position three-way solenoid valve 3 and the second two-position three-way solenoid valve 4 is completely independent in passage from the input to the contact of the 24VDC power supply module 7 to the DCS system 6 to the normally closed contact of the local manual emergency cut-off button 5.
Specifically, normally closed contacts of the on-site manual emergency cut-off button 5 are respectively connected in series with a (+) end and a (-) end of a 24VDC power circuit, so that when the on-site manual emergency cut-off button 5 is pressed, the (+) end and the (-) end of the 24VDC power circuit are effectively disconnected, and the natural gas emergency cut-off ESD valve 1 is cut off emergently.
Those not described in detail in this specification are well within the skill of the art.
In addition, it should be noted that the above contents described in the present specification are only illustrations of the structures of the present invention. Equivalent variations of the described configurations, features and principles of the present inventive concept are included within the scope of the present invention. Those skilled in the art to which the utility model relates will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the utility model as disclosed in the accompanying claims.
Claims (7)
1. A solenoid valve control system for an ESD valve of a gas pressure regulating station of a gas power plant is characterized by comprising a natural gas emergency cut-off ESD valve (1), a two-position five-way pneumatic control valve (2), a first two-position three-way solenoid valve (3), a second two-position three-way solenoid valve (4), an on-site manual emergency cut-off button (5), a DCS (distributed control system) system (6), a 24VDC power module (7), an on-site control box (8) and a pressure regulating station control cabinet (9); the natural gas emergency cut-off ESD valve (1) is connected with an air outlet of the two-position five-way air control valve (2), an air inlet of the two-position five-way air control valve (2) is connected with an air outlet of the first two-position three-way electromagnetic valve (3), 2 air inlets of the first two-position three-way electromagnetic valve (3) are respectively connected with a compressed air pipeline and an air outlet of the second two-position three-way electromagnetic valve (4), an air inlet of the second two-position three-way electromagnetic valve (4) is connected with a compressed air pipeline, control coils of the first two-position three-way electromagnetic valve (3) and the second two-position three-way electromagnetic valve (4) are both connected with a normally closed contact of the on-site manual emergency cut-off button (5), the other end of the normally closed contact of the on-site manual emergency cut-off button (5) is connected with a signal output contact end of the DCS system (6), a signal input contact end of the DCS system (6) is connected with an output end of the 24VDC power supply module (7), 220VDC input ends of the 24VDC power supply module (7) are respectively connected with 2 UPS power supplies; the first two-position three-way electromagnetic valve (3), the second two-position three-way electromagnetic valve (4) and the local manual emergency cut-off button (5) are installed in a local control box (8), and the local control box (8) is arranged adjacent to the natural gas emergency cut-off ESD valve (1); the 24VDC power supply module (7) and the DCS system (6) are installed in a voltage regulation station control cabinet (9), and the voltage regulation station control cabinet (9) is arranged in a control room of the natural gas voltage regulation station.
2. The solenoid valve control system for the ESD valve of a gas power plant gas pressure regulating station according to claim 1, characterized in that a control panel is installed in the local control box (8), and the local manual emergency shut-off button (5) is installed on the control panel.
3. The electromagnetic valve control system for the ESD valve of the gas power plant gas pressure regulating station according to claim 1, characterized in that the first two-position three-way electromagnetic valve (3) and the second two-position five-way pneumatic control valve (2) are connected by a rubber hose.
4. The electromagnetic valve control system for the ESD valve of the gas power plant gas pressure regulating station according to claim 1, wherein the natural gas emergency shut-off ESD valve (1) is controlled to be opened and closed by the two-position five-way pneumatic control valve (2); when the cylinder of the natural gas emergency cut-off ESD valve (1) is used for air intake, the natural gas emergency cut-off ESD valve (1) is opened, and when the cylinder of the natural gas emergency cut-off ESD valve (1) is used for air exhaust, the natural gas emergency cut-off ESD valve (1) is closed.
5. The electromagnetic valve control system for the ESD valve of the gas power plant gas pressure regulating station according to claim 1, characterized in that when any one of the first two-position three-way electromagnetic valve (3) and the second two-position three-way electromagnetic valve (4) is electrified, the natural gas emergency cut-off ESD valve (1) is opened; when the first two-position three-way electromagnetic valve (3) and the second two-position three-way electromagnetic valve (4) lose electricity, the natural gas emergency cut-off ESD valve (1) is closed.
6. The electromagnetic valve control system for the ESD valve of the gas power plant gas pressure regulating station according to claim 1, characterized in that the UPS power supply of the 24VDC power supply module (7) is respectively taken from the electrical direct current systems of 2 sets of different units.
7. The solenoid valve control system for the ESD valve of a gas power plant gas pressure regulating station according to claim 1, characterized in that the normally closed contacts of the on-site manual emergency cut-off button (5) are connected in series to the (+) and (-) terminals of a 24VDC power supply circuit, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122646142.3U CN216844143U (en) | 2021-11-01 | 2021-11-01 | Electromagnetic valve control system for ESD valve of gas pressure regulating station of gas power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122646142.3U CN216844143U (en) | 2021-11-01 | 2021-11-01 | Electromagnetic valve control system for ESD valve of gas pressure regulating station of gas power plant |
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| Publication Number | Publication Date |
|---|---|
| CN216844143U true CN216844143U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122646142.3U Active CN216844143U (en) | 2021-11-01 | 2021-11-01 | Electromagnetic valve control system for ESD valve of gas pressure regulating station of gas power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216844143U (en) |
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2021
- 2021-11-01 CN CN202122646142.3U patent/CN216844143U/en active Active
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