CN212376633U - Emergency cut-off device with remote control and local mechanical control functions - Google Patents
Emergency cut-off device with remote control and local mechanical control functions Download PDFInfo
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- CN212376633U CN212376633U CN202021255214.0U CN202021255214U CN212376633U CN 212376633 U CN212376633 U CN 212376633U CN 202021255214 U CN202021255214 U CN 202021255214U CN 212376633 U CN212376633 U CN 212376633U
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000003345 natural gas Substances 0.000 claims abstract description 43
- 239000007789 gas Substances 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 239000002343 natural gas well Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a have remote control and local mechanical control function's emergency cut-off device concurrently, the solenoid valve is connected to the air compressor machine, quick bleeder valve and pneumatic actuator, pneumatic actuator drive emergency cut-off valve, the entry and the well head natural gas line of emergency cut-off valve are connected, a pressure transmitter and a solenoid valve for detecting well head natural gas pressure correspond with the controller respectively and are connected, the export of three-way valve solenoid valve respectively, the entry of quick bleeder valve and the port connection of giving vent to anger of high-low pressure pilot valve, the entry of emergency cut-off valve is high with high low pressure pilot valve simultaneously, the low pressure port is connected, the inlet port of high-low pressure pilot valve and the export or the entry linkage of. The utility model discloses both can realize the remote automation or the manual control to the emergency cut-off valve through the controller, also can realize the local automatic control to the emergency cut-off valve through high-low pressure pilot valve, show to have improved reliability and accuracy nature to well head natural gas pressure control, stop the potential safety hazard better.
Description
Technical Field
The utility model relates to a mainly used natural gas well mouth trachea on-off control's urgent cutting device especially relates to a have urgent cutting device of remote control and local mechanical control function concurrently.
Background
In order to avoid the influence of over-high or over-low air pressure on related natural gas equipment, an emergency cut-off valve is installed on a natural gas well mouth air pipe, the emergency cut-off valve is closed when the air pressure is over-high or over-low, and natural gas conveying is stopped, so that high-pressure and low-pressure protection of natural gas is realized, wherein the high-pressure protection can effectively prevent accidents such as natural gas leakage caused by burst of a downstream pipeline, and the low-pressure protection can effectively protect a gas well from being sealed by water due to insufficient pressure.
The emergency cut-off valve generally realizes a switching function through a pneumatic actuator, the pneumatic actuator takes clean and dry compressed air as a power source and comprises an air cylinder, a spring, a transmission rod and the like, when compressed air is input, the pneumatic actuator drives the emergency cut-off valve to be in an open state, and when no compressed air is input, the pneumatic actuator drives the emergency cut-off valve to be in a closed state. The devices including the slam shut valve, pneumatic actuator and other compressed air supply equipment are collectively referred to as slam shut devices.
The traditional emergency cut-off device adopts a remote control mode and comprises an emergency cut-off valve, a pneumatic actuator, a quick release valve, an electromagnetic valve, a pressure regulating valve, a filter, an air compressor, a pressure transmitter and a controller, wherein a compressed air outlet of the air compressor is sequentially connected with the filter, the pressure regulating valve, the electromagnetic valve, the quick release valve and an air cylinder inlet of the pneumatic actuator, and the controller generally adopts a PLC (programmable logic controller); the pressure transmitter is a pressure sensor and is arranged on a natural gas wellhead gas pipe and used for detecting the pressure of the natural gas at the wellhead and transmitting a signal to the controller; when the pressure of natural gas at a wellhead is normal, the controller controls the electromagnetic valve to be in an open state, and the pneumatic actuator is provided with compressed air input to drive the emergency cut-off valve to be in an open state; when the pressure of natural gas at the wellhead is too high or too low, the controller controls the electromagnetic valve to be in a disconnected state, the pneumatic actuator does not input compressed air, and the emergency cut-off valve is driven to be in a disconnected state, so that the purpose of safety protection is achieved.
The above conventional emergency cut-off device has drawbacks in that: when a communication cable between the controller and the pressure transmitter or the electromagnetic valve is damaged or a transmission signal is interfered, the control delay or failure of the electromagnetic valve can be caused, and finally the opening and closing of the emergency cut-off valve are not timely; the control form is single, and if the pressure transmitter, the controller or the electromagnetic valve fails, the automatic opening and closing of the emergency cut-off valve cannot be realized; the reliability and the accuracy of monitoring the natural gas pressure at the well mouth are reduced, and the potential safety hazard caused by overhigh or overlow natural gas pressure at the well mouth is not avoided.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide an emergency cut-off device with remote control and local mechanical control functions for solving the above problems.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
an emergency cut-off device with remote control and local mechanical control functions comprises an emergency cut-off valve, a pneumatic actuator, a quick release valve, an electromagnetic valve, an air compressor, a pressure transmitter and a controller, wherein a compressed air outlet of the air compressor is sequentially connected with the electromagnetic valve, the quick release valve and an air cylinder inlet of the pneumatic actuator, a transmission rod of the pneumatic actuator is connected with a valve rod of the emergency cut-off valve, an inlet of the emergency cut-off valve is connected with a wellhead natural gas pipeline, the pressure transmitter is used for detecting the pressure of the wellhead natural gas, a signal output end of the pressure transmitter is connected with a signal input end of the controller, and a control input end of the electromagnetic valve is connected with a control output end of the controller; the emergency cut-off device further comprises a three-way valve and a high-low pressure pilot valve, a first port of the three-way valve is connected with an outlet of the electromagnetic valve, a second port of the three-way valve is connected with an inlet of the rapid relief valve, a third port of the three-way valve is connected with an air outlet port of the high-low pressure pilot valve, the three-way valve is used for controlling the conduction of the second port of the three-way valve and the first port or the third port, an inlet of the emergency cut-off valve is simultaneously connected with high-low pressure ports of the high-low pressure pilot valve, and an air inlet port of the high-low pressure pilot valve is connected with an.
In the structure, the emergency cut-off valve, the pneumatic actuator, the quick release valve, the electromagnetic valve, the air compressor, the pressure transmitter, the controller, the three-way valve and the high-low pressure pilot valve all adopt conventional parts and equipment in the prior art, the utility model discloses the key point is that each part and equipment are organically integrated to form a new system, so that the system has the functions of remote control and local mechanical control; the air circuit is a remote control air circuit, and the other air circuit is an air compressor → an electromagnetic valve (if the air inlet port of the high-low pressure pilot valve is connected with the outlet of the electromagnetic valve, the air circuit is provided with the electromagnetic valve), and if the air inlet port of the high-low pressure pilot valve is connected with the inlet of the electromagnetic valve, the air circuit is not provided with the electromagnetic valve) → the high-low pressure pilot valve → the quick release valve → the pneumatic actuator, and the air circuit is a local mechanical control air circuit; the high-low pressure pilot valve is also called a high-low pressure valve, a high-low pressure stop valve and the like, and the basic working principle is as follows: when the gas pressure connected with the high pressure port and the low pressure port of the high-low pressure pilot valve is larger than a preset high pressure value or smaller than a preset low pressure value, the gas inlet port and the gas outlet port of the high-low pressure pilot valve are disconnected, and otherwise, the gas inlet port and the gas outlet port of the high-low pressure pilot valve are connected. The utility model discloses this theory of operation who utilizes high-low pressure pilot valve realizes the automated inspection to the well head natural gas pressure in the well head natural gas line, in case this pressure is too big or undersize, then can lead to the disconnection of high-low pressure pilot valve, cuts off the air supply of quick bleeder valve, makes the compressed air in quick bleeder valve's the quick exhaust pneumatic actuator's of quick bleeder valve cylinder to make the pneumatic actuator drive emergency cut-off valve close.
Further, in order to facilitate connection, an inlet of the emergency cut-off valve is connected with an inlet of the manual valve, an outlet of the manual valve is connected with an inlet of the three-way joint, and two outlets of the three-way joint are respectively connected with a high pressure port and a low pressure port of the high-low pressure pilot valve.
Preferably, in order to integrate most parts of the device, a first end of the pressure taking gas pipe is connected with high and low pressure ports of the high and low pressure pilot valve, and a through hole which is communicated with the inside and the outside is arranged on the pipe wall of the inlet side of the emergency cut-off valve and is hermetically connected with a second end of the pressure taking gas pipe; or the wellhead natural gas pipeline can also be connected with the second end of the pressure taking gas pipe in parallel, and the functions are the same.
According to actual needs, the three-way valve is a manual three-way ball valve or an electric three-way electromagnetic valve; and if the three-way valve is an electric three-way electromagnetic valve, the control input end of the three-way valve is connected with the control output end of the controller. Therefore, the switching of the two air channels can be controlled locally and manually or remotely according to the requirement.
The beneficial effects of the utility model reside in that:
the utility model discloses an increase three-way valve and high and low pressure pilot valve and parallelly connected the front end at quick bleeder valve with it, realize the optional conversion of two gas circuits, can realize the long-range automation or the manual control to the emergency cut-off valve through the controller on the one hand, on the other hand can realize the local automatic control to the emergency cut-off valve through high and low pressure pilot valve, and local control is pure mechanical structure, the control that probably causes when not damaged or the transmission signal receives the interference by the communication cable is malfunctioning or the influence of postponing, control scheme is optional, if meet pressure transmitter, still can realize the automatic start-stop of emergency cut-off valve when controller or solenoid valve trouble, show and improve reliability and accuracy nature to well head natural gas pressure control, the potential safety hazard that causes because of well head natural gas pressure is too high or low excessively has been stopped better.
Drawings
Fig. 1 is a perspective view of the emergency cut-off device with remote control and local mechanical control functions of the present invention, showing a wellhead natural gas pipeline;
fig. 2 is a schematic structural diagram of an emergency cut-off device having both remote control and local mechanical control functions according to the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2, the emergency cut-off device with both remote control and local mechanical control functions of the present invention includes an emergency cut-off valve 11, a pneumatic actuator 3, a quick release valve 1, a solenoid valve 6, an air compressor (i.e. air compressor, not shown), a pressure transmitter (i.e. pressure sensor, not shown), a controller (preferably PLC, not shown), a three-way valve 9 and a high-low pressure pilot valve 5, wherein a compressed air outlet of the air compressor is sequentially connected to cylinder inlets of the solenoid valve 6, the quick release valve 1 and the pneumatic actuator 3, a transmission rod of the pneumatic actuator 3 is connected to a valve rod of the emergency cut-off valve 11, an inlet of the emergency cut-off valve 11 is connected to a wellhead natural gas pipeline 12, the pressure transmitter is used for detecting wellhead natural gas pressure, and a signal output end, the control input end of the electromagnetic valve 6 is connected with the control output end of the controller; a first port of the three-way valve 9 is connected with an outlet of the electromagnetic valve 6, a second port of the three-way valve 9 is connected with an inlet of the quick release valve 1, a third port of the three-way valve 9 is connected with an air outlet port of the high-low pressure pilot valve 5, the three-way valve 9 is used for controlling the conduction of the second port of the three-way valve 9 with the first port or the third port, an inlet of the emergency cut-off valve 11 is simultaneously connected with the high-low pressure port of the high-low pressure pilot valve 5, and an air inlet port of the high-low pressure pilot valve 5 is connected with an outlet of the electromagnetic valve 6.
Fig. 1 and 2 also show a filter 8 for filtering compressed air, a pressure regulating valve 7 for regulating the pressure of the compressed air, and an indicator switch 2 provided on the pneumatic actuator 3, which are of adaptive conventional construction.
As shown in fig. 1 and 2, during use, the air compressor generates compressed air and sends the compressed air to the inlet of the electromagnetic valve 6, and then determines which air path enters the cylinder of the pneumatic actuator 3 according to the selection of the three-way valve 9, wherein the two air paths are respectively: the first air path is an air compressor → the electromagnetic valve 6 → the quick release valve 1 → the pneumatic actuator 3, the air path is a remote control air path, and the second air path is an air compressor → the electromagnetic valve 6 (if the air inlet port of the high-low pressure pilot valve 5 is connected with the outlet of the electromagnetic valve 6, the air path has the electromagnetic valve 6, in this example, the electromagnetic valve 6 is provided, if the air inlet port of the high-low pressure pilot valve 5 is connected with the inlet of the electromagnetic valve 6, the air path does not have the electromagnetic valve 6) → the high-low pressure pilot valve 5 → the quick release valve 1 → the pneumatic actuator 3, and the air path is a local mechanical control air path.
If the first air passage is selected, the control principle of the emergency cut-off device is as follows: if the pressure of the wellhead natural gas in the wellhead natural gas pipeline 12 is normal, the controller controls the electromagnetic valve 6 to be in an opening state, the air inlet of the rapid relief valve 1 keeps high pressure and does not exhaust, the pneumatic actuator 3 drives the emergency cut-off valve 11 to be in a conducting state, and the wellhead natural gas in the wellhead natural gas pipeline 12 is normally conveyed to downstream equipment; if the pressure of the wellhead natural gas in the wellhead natural gas pipeline 12 is too high or too low, the pressure transmitter sends the signal to the controller, the controller controls the electromagnetic valve 6 to be in a closed state, the air inlet of the quick release valve 1 loses high pressure, the air is quickly exhausted, the pneumatic actuator 3 drives the emergency cut-off valve 11 to be in a closed state, the wellhead natural gas in the wellhead natural gas pipeline 12 cannot be conveyed to downstream equipment, and safety accidents are avoided.
If the second air path is selected, the control principle of the emergency cut-off device is as follows: if the pressure of the wellhead natural gas in the wellhead natural gas pipeline 12 is normal, the gas inlet port and the gas outlet port of the high-low pressure pilot valve are kept communicated, the gas inlet of the rapid relief valve 1 keeps high pressure and cannot exhaust gas, the pneumatic actuator 3 drives the emergency cut-off valve 11 to be in a communicated state, and the wellhead natural gas in the wellhead natural gas pipeline 12 is normally conveyed to downstream equipment; if the pressure of the wellhead natural gas in the wellhead natural gas pipeline 12 is too high or too low, the inlet port and the outlet port of the high-low pressure pilot valve are automatically disconnected, the air inlet of the quick release valve 1 loses high pressure, quick exhaust is realized, the pneumatic actuator 3 drives the emergency cut-off valve 11 to be in a closed state, the wellhead natural gas in the wellhead natural gas pipeline 12 cannot be conveyed to downstream equipment, and safety accidents are avoided.
As shown in fig. 1 and fig. 2, the present invention further discloses the following various optimized specific structures, which can be combined with one or more of the following structures in an overlapping manner according to actual needs to form a new and more optimized technical solution.
For convenience of connection, an inlet of the emergency cut-off valve 11 is connected with an inlet of the manual valve 4, an outlet of the manual valve 4 is connected with an inlet of a three-way joint 10, two outlets of the three-way joint 10 are respectively connected with a high-pressure port and a low-pressure port of the high-pressure and low-pressure pilot valve 5, and the three-way joint 10 can have a switching function.
In order to integrate most parts of the device together, a first end of a pressure taking pipe (not marked in the figure) is connected with high and low pressure ports of a high and low pressure pilot valve 5, a through hole which is communicated with the inside and the outside is arranged on the pipe wall of the inlet side of the emergency cut-off valve 11, and the through hole is connected with a second end of the pressure taking pipe in a sealing way; or the second end of the pressure taking pipe can be connected with the wellhead natural gas pipeline 12 in parallel, and the functions are the same. In the case of manual valve 4 and three-way joint 10, a first end of a pressure-taking pipe (not shown) is connected to an inlet of manual valve 4.
According to actual needs, the three-way valve 9 is a manual three-way ball valve or an electric three-way electromagnetic valve; if the three-way valve is an electric three-way electromagnetic valve, the control input end of the three-way valve 9 is connected with the control output end of the controller. Therefore, the switching of the two air channels can be controlled locally and manually or remotely according to the requirement.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.
Claims (4)
1. An emergency cut-off device with remote control and local mechanical control functions comprises an emergency cut-off valve, a pneumatic actuator, a quick release valve, an electromagnetic valve, an air compressor, a pressure transmitter and a controller, wherein a compressed air outlet of the air compressor is sequentially connected with the electromagnetic valve, the quick release valve and an air cylinder inlet of the pneumatic actuator, a transmission rod of the pneumatic actuator is connected with a valve rod of the emergency cut-off valve, an inlet of the emergency cut-off valve is connected with a wellhead natural gas pipeline, the pressure transmitter is used for detecting the pressure of the wellhead natural gas, a signal output end of the pressure transmitter is connected with a signal input end of the controller, and a control input end of the electromagnetic valve is connected with a control output end of the controller; the method is characterized in that: the emergency cut-off device further comprises a three-way valve and a high-low pressure pilot valve, a first port of the three-way valve is connected with an outlet of the electromagnetic valve, a second port of the three-way valve is connected with an inlet of the rapid relief valve, a third port of the three-way valve is connected with an air outlet port of the high-low pressure pilot valve, the three-way valve is used for controlling the conduction of the second port of the three-way valve and the first port or the third port, an inlet of the emergency cut-off valve is simultaneously connected with high-low pressure ports of the high-low pressure pilot valve, and an air inlet port of the high-low pressure pilot valve is connected with an.
2. The emergency shutdown device of claim 1, further comprising a remote control and a local mechanical control, wherein: the inlet of the emergency cut-off valve is connected with the inlet of the manual valve, the outlet of the manual valve is connected with the inlet of the three-way joint, and the two outlets of the three-way joint are respectively connected with the high-pressure port and the low-pressure port of the high-pressure and low-pressure pilot valve.
3. Emergency cut-off device with both remote control and local mechanical control functions according to claim 1 or 2, characterized in that: the first end of the pressure taking air pipe is connected with the high-pressure port and the low-pressure port of the high-pressure and low-pressure pilot valve, the pipe wall of the inlet side of the emergency cut-off valve is provided with a through hole which is communicated with the inside and the outside, and the through hole is hermetically connected with the second end of the pressure taking air pipe; or the wellhead natural gas pipeline is connected with the second end of the pressure taking gas pipe in parallel.
4. Emergency cut-off device with both remote control and local mechanical control functions according to claim 1 or 2, characterized in that: the three-way valve is a manual three-way ball valve or an electric three-way electromagnetic valve; and if the three-way valve is an electric three-way electromagnetic valve, the control input end of the three-way valve is connected with the control output end of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021255214.0U CN212376633U (en) | 2020-07-01 | 2020-07-01 | Emergency cut-off device with remote control and local mechanical control functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021255214.0U CN212376633U (en) | 2020-07-01 | 2020-07-01 | Emergency cut-off device with remote control and local mechanical control functions |
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| Publication Number | Publication Date |
|---|---|
| CN212376633U true CN212376633U (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021255214.0U Expired - Fee Related CN212376633U (en) | 2020-07-01 | 2020-07-01 | Emergency cut-off device with remote control and local mechanical control functions |
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| CN (1) | CN212376633U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577200A (en) * | 2020-07-01 | 2020-08-25 | 成都英派尔新能源科技有限公司 | Emergency cut-off device with remote control and local mechanical control functions |
-
2020
- 2020-07-01 CN CN202021255214.0U patent/CN212376633U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577200A (en) * | 2020-07-01 | 2020-08-25 | 成都英派尔新能源科技有限公司 | Emergency cut-off device with remote control and local mechanical control functions |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210119 |
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| CF01 | Termination of patent right due to non-payment of annual fee |