CN210318749U - DN600 and above large-diameter valve safety cut-off valve control system - Google Patents
DN600 and above large-diameter valve safety cut-off valve control system Download PDFInfo
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- CN210318749U CN210318749U CN201921456724.1U CN201921456724U CN210318749U CN 210318749 U CN210318749 U CN 210318749U CN 201921456724 U CN201921456724 U CN 201921456724U CN 210318749 U CN210318749 U CN 210318749U
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Abstract
The utility model relates to a DN600 reaches above heavy-calibre valve safety cut-off valve control system, including actuating mechanism, the control unit includes a set of quick exhaust valve, connects the high pressure filter of safety cut-off valve front pipeline and sets for the relief pressure valve of actuating mechanism's safe pressure, quick exhaust valve's the end of giving vent to anger is connected with actuating mechanism, and quick exhaust valve's inlet end is connected with two three-way gas accuse valves, the relief pressure valve end of giving vent to anger is connected with the solenoid valve, and the solenoid valve end of giving vent to anger is connected with two three-way gas accuse valve inlet ends, is connected with mechanical pressure switch on the valve rear pipeline of safety cut-off valve, and mechanical pressure switch. The utility model discloses a pneumatic control actuating mechanism action to provide great thrust, thereby realize that the long-range of safety cut-off valve cuts off fast, the superpressure cuts off on the spot manually open, long-range cutting off on the spot manually opens the scheduling function.
Description
Technical Field
The utility model belongs to the technical field of the natural gas transportation technique and specifically relates to a DN600 and above heavy-calibre valve safety cut-off valve control system.
Background
The natural gas safety shut-off valve is mainly applied to a natural gas conveying system and serves as a key device for safety shut-off, and the function of the natural gas safety shut-off valve is that when the downstream pressure of a gas pipeline exceeds the set pressure of a safety shut-off valve control system, the safety shut-off valve shuts off gas transmission of the pipeline so as to protect the safety of the downstream pipeline.
The safety cut-off valve mainly has the control functions of remote cut-off, local cut-off, overpressure cut-off, manual reset and the like, and the cut-off time is less than two seconds. The existing safety cut-off valve control system mainly comprises a commander, a voltage stabilizer and an actuator, wherein the actuator comprises a manual cut-off part, an electric cut-off part and a pneumatic cut-off part, when the pressure of a downstream pipeline exceeds the pressure set by the commander, the commander outputs an air signal to the pneumatic cut-off part of the actuator to enable the actuator to act to cut off the valve, but the output force of the existing control system is small, the actuator mainly acts by the spring force and is only suitable for safely cutting off the valve of the safety cut-off valve with the caliber smaller than 400, and for the valve with the caliber of 600 or more, because the pipeline pressure and the valve closing force are both large, the existing control system is difficult to provide enough closing force to enable the valve to be quickly cut off, and a new control mode is required to be found to realize the quick cut-off.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a satisfy the used safe cut-off valve control system of DN600 and above heavy-calibre valve.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a DN600 reaches above heavy-calibre valve safety cut-off valve control system, includes the control unit who connects actuating mechanism, the action of one set of control actuating mechanism that the safety cut-off valve implemented the cut-off action, the control unit include a set of quick exhaust valve, connect the high pressure filter of safety cut-off valve front pipeline and set for the required safe pressure's of actuating mechanism relief pressure valve, quick exhaust valve's the end of giving vent to anger is connected with actuating mechanism, is equipped with the high pressure relief pressure valve on the pipeline that high pressure filter connects the relief pressure valve, and quick exhaust valve's inlet end is connected with two tee bend pneumatic control valves, the relief pressure valve end of giving vent to anger is connected with the solenoid valve, and the solenoid valve end of giving vent to anger is connected with two tee bend pneumatic control valve inlet.
Furthermore, the mechanical pressure switch is connected with a pipeline between the pressure reducing valve and the electromagnetic valve.
In order to prevent the high-pressure reducing valve from being damaged or the pressure of the high-pressure reducing valve exceeds 1MPa, a safety valve is connected on a pipeline between the high-pressure reducing valve and the reducing valve so as to drain gas in the pipeline.
Preferably, the actuating mechanism is provided with a travel switch, and the travel switch is connected with the station control room through a junction box.
The utility model has the advantages that: the utility model discloses a pneumatic control actuating mechanism action to provide great thrust, thereby realize that the long-range of safety cut-off valve cuts off fast, the superpressure cuts off on the spot manually open, long-range cutting off on the spot manually opens the scheduling function.
Drawings
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic view of the flow structure of the present invention.
In the figure: 1. the system comprises a safety shut-off valve, 2, an actuating mechanism, 3, a quick exhaust valve, 4, a high-pressure filter, 5, a pressure reducing valve, 6, a high-pressure reducing valve, 7, a two-position three-way pneumatic control valve, 8, an electromagnetic valve, 9, a mechanical pressure switch, 10, a three-way manual ball valve, 11, a safety valve, 12, a travel switch, 13, a junction box and 14, and a station control room.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
The system for controlling the safety cut-off valve of the valve with the diameter of no less than DN600 shown in figure 1 comprises an actuating mechanism 2 connected with the safety cut-off valve 1 to perform the cut-off action and a set of control units for controlling the action of the actuating mechanism 2, wherein the actuating mechanism 2 is provided with a travel switch 12, and the travel switch 12 is connected with a station control room 14 through a junction box 13.
The control unit comprises a group of four quick exhaust valves 3 arranged side by side, a high-pressure filter 4 connected with a valve front pipeline of the safety shut-off valve 1 and a pressure reducing valve 5 for setting the safety pressure required by the actuating mechanism 2, wherein the high-pressure filter 4 is provided with a high-pressure reducing valve 6 on a pipeline leading to the pressure reducing valve 5, and a safety valve 11 is connected on a pipeline between the high-pressure reducing valve 6 and the pressure reducing valve 5.
The quick exhaust valve 3 give vent to anger the end and be connected with actuating mechanism 2, and quick exhaust valve 3's inlet end is connected with two tee bend gas accuse valves 7, 5 of relief pressure valves give vent to anger the end and be connected with solenoid valve 8, and solenoid valve 8 gives vent to anger the end and is connected with two tee bend gas accuse valves 7 inlet end, is connected with mechanical pressure switch 9 on the valve rear pipeline of safety cut-off valve 1, and mechanical pressure switch 9 is connected with two tee bend gas accuse valves 7 through tee bend manual ball valve 10, and mechanical pressure switch 9 still connects the pipeline between relief pressure valve 5 and the solenoid valve 8.
The utility model discloses a be equipped with high thrust pneumatic control's actuating mechanism 2 for safety cut-off valve 1, realize that the long-range of safety cut-off valve 1 is cut off fast, the superpressure cuts off on the spot manually open, long-range cutting off on the spot manually opens the scheduling function.
Opening a valve: firstly, the pressure of a front pipeline of the safety shut-off valve 1 is connected into a high-pressure filter 4 for gas source filtration, the filtered clean gas enters a high-pressure reducing valve 6 for pressure reduction, so that the gas pressure is reduced to be within 1MPa (if the high-pressure reducing valve 6 is damaged or the gas pressure exceeds 1MPa, the gas is emptied by a safety valve 11), the reduced gas continuously enters a reducing valve 5, the safety pressure required by an actuating mechanism 2 is set through the reducing valve 5 and is output to an electromagnetic valve 8, when the electromagnetic valve 8 is electrified, a first port and a second port of the electromagnetic valve 8 are communicated, and the gas source can enter a two-position three-way pneumatic control valve; when no signal is input into the four ports of the two-position three-way pneumatic control valve 7, the second port and the third port are communicated, the air source continuously enters the quick exhaust valve 3 through the two-position three-way pneumatic control valve 7, and then enters the execution mechanism 2 through the air outlet of the quick exhaust valve 3 to open the valve of the safety cut-off valve 1.
Remote quick cut-off: after the valve of safety cut-off valve 1 was opened, remote operation made the outage of solenoid valve 8, and the second of solenoid valve 8, third port switched on, made the gas in the trachea around two tee bend gas accuse valves 7 through the evacuation of solenoid valve 8, when quick exhaust valve 3 air inlet no gas input, quick exhaust valve 3's gas outlet and gas vent switched on, and the gas was evacuated through quick exhaust valve 3's gas vent in actuating mechanism 2 this moment, and safety cut-off valve 1's valve is cut off fast.
And (3) quick overpressure cut-off: after the valve of the safety cut-off valve 1 is opened, when the downstream pressure of a valve pipeline exceeds the safety pressure set by the mechanical pressure switch 9, the air inlet and the air outlet of the mechanical pressure switch 9 are communicated, the three-way manual ball valve 10 is switched to a third air inlet and is communicated with a first air inlet, at this time, pressure gas coming from the pressure reducing valve 5 enters the fourth port of the two-position three-way pneumatic control valve 7 through the mechanical pressure switch 9 and the three-way manual ball valve 10, the second port and the first port of the two-position three-way pneumatic control valve 7 are communicated, gas in the air pipes in front of and behind the two-position three-way pneumatic control valve 7 is exhausted through the first port, when no gas is input at the air inlet of the quick exhaust valve 3, the air outlet of the quick exhaust valve 3 is communicated with the air outlet, at.
Manually confirming opening on site: after the safety cut-off valve 1 is cut off, the valve cannot be automatically opened, and only after field personnel confirm safety, the valve of the safety cut-off valve 1 can be opened again by pressing the reset manual buttons of the electromagnetic valve 8 and the two-position three-way pneumatic control valve 7.
The control system is arranged in an incubator.
The utility model discloses a 2 actions of pneumatic mode control actuating mechanism to this can provide great thrust switching safety trip valve 1's valve, thereby realize that long-range quick cut-off, the superpressure of safety trip valve 1 cut off fast, the superpressure is cut off on the spot manually and is opened, long-range cut off on the spot manually function such as open, satisfied DN600 and above heavy-calibre safety trip valve 1 cut off the operation requirement of pipeline gas transmission, ensured the safety of low reaches pipeline.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. The utility model provides a DN600 and above heavy-calibre valve safety shut-off valve control system, is including connecting actuating mechanism (2) that safety shut-off valve (1) implemented the shut-off action, the control unit of a set of control actuating mechanism (2) action, characterized by: the control unit comprises a group of quick exhaust valves (3), a high-pressure filter (4) connected with a front pipeline of the safety shut-off valve (1) and a pressure reducing valve (5) for setting the safety pressure required by the actuating mechanism (2), the air outlet end of the quick exhaust valve (3) is connected with the actuating mechanism (2), a high-pressure reducing valve (6) is arranged on a pipeline of the high-pressure filter (4) connected with the reducing valve (5), the air inlet end of the quick exhaust valve (3) is connected with a two-position three-way air control valve (7), the air outlet end of the pressure reducing valve (5) is connected with an electromagnetic valve (8), the air outlet end of the electromagnetic valve (8) is connected with the air inlet end of a two-position three-way air control valve (7), a mechanical pressure switch (9) is connected to a valve rear pipeline of the safety cut-off valve (1), and the mechanical pressure switch (9) is connected with the two-position three-way air control valve (7) through a three-way manual ball valve (10).
2. The DN600 and above large-caliber valve safety cut-off valve control system of claim 1, wherein: the mechanical pressure switch (9) is connected with a pipeline between the pressure reducing valve (5) and the electromagnetic valve (8).
3. The DN600 and above large-caliber valve safety cut-off valve control system of claim 1, wherein: and a safety valve (11) is connected on a pipeline between the high-pressure reducing valve (6) and the reducing valve (5).
4. The DN600 and above large-caliber valve safety cut-off valve control system of claim 1, wherein: the actuating mechanism (2) is provided with a travel switch (12), and the travel switch (12) is connected with a station control room (14) through a junction box (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921456724.1U CN210318749U (en) | 2019-09-04 | 2019-09-04 | DN600 and above large-diameter valve safety cut-off valve control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921456724.1U CN210318749U (en) | 2019-09-04 | 2019-09-04 | DN600 and above large-diameter valve safety cut-off valve control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210318749U true CN210318749U (en) | 2020-04-14 |
Family
ID=70132101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921456724.1U Active CN210318749U (en) | 2019-09-04 | 2019-09-04 | DN600 and above large-diameter valve safety cut-off valve control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210318749U (en) |
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2019
- 2019-09-04 CN CN201921456724.1U patent/CN210318749U/en active Active
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