CN212430475U - Pipeline cut-off monitoring system - Google Patents
Pipeline cut-off monitoring system Download PDFInfo
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- CN212430475U CN212430475U CN202020756384.0U CN202020756384U CN212430475U CN 212430475 U CN212430475 U CN 212430475U CN 202020756384 U CN202020756384 U CN 202020756384U CN 212430475 U CN212430475 U CN 212430475U
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- valve
- pipeline
- cut
- blind plate
- signal
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Abstract
The utility model discloses a monitored control system is cut off to pipeline is equipped with the valve and the blind plate valve that cut off that are used for controlling the break-make of medium pipeline on the medium pipeline, cut off the pipeline between valve and blind plate valve, install the pressure transmitter who acquires the pipeline internal gas pressure signal between the valve on the pipeline between the valve, pressure transmitter passing signal line connection director's signal input part, display and alarm are connected to the signal output part of controller. The utility model has the advantages of can avoid cutting off the problem that valve and blind plate valve can not cut off the position and lead to leaking, system simple structure, simple to operate is convenient for popularize.
Description
Technical Field
The utility model relates to a pipeline transport technical field especially relates to pipeline of poisonous and harmful medium such as transportation coal gas cuts off monitored control system.
Background
At present, the reliable cut-off of poisonous and harmful media such as coal gas is mostly realized by adopting a blind plate mode, most enterprises can adopt a valve to close pipeline coal gas in the design, and an electric blind plate valve is additionally arranged to reliably cut off the medium operation, so that the safety of the operation environment is ensured.
The operation procedure of the blind plate valve is as follows: unclamping the valve-opening (or closing) the valve-clamping the valve;
the reliable medium cutting steps are as follows: closing a main valve of the pipeline flow direction, namely closing a blind plate valve;
in the prior art, no linkage protection is provided between the pipeline closing valve and the blind plate valve, so that misoperation is easy; or, the valve closing in-place signal is interlocked with the blind plate valve (the valve cannot realize interlocking under the conditions of non-electric valves and no limit switches) for interlocking, when the pipeline valve is closed and the closing signal is allowed, the valve is probably not closed tightly, and at the moment, the blind plate is opened for clamping operation, so that medium leakage is easily caused, and safety accidents occur.
Disclosure of Invention
The utility model aims to solve the technical problem that realize a system that guarantee pipeline can reliably cut off.
In order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides a monitored control system is cut off to pipeline, is equipped with the valve and the blind plate valve of cutting off that are used for controlling the break-make of medium pipeline on the medium pipeline, cut off for the pipeline between the valve between valve and blind plate valve, install the pressure transmitter who obtains the pipeline internal gas pressure signal between the valve on the pipeline between the valve, pressure transmitter passes through the signal input part of signal line connection director, display and alarm are connected to the signal output part of controller.
The cut-off valve and the blind plate valve are respectively a pneumatic valve and an electric valve, the cut-off valve is provided with an operation key for controlling the on-off of the cut-off valve and is interlocked with conditions set in the PLC, automatic cut-off is realized when the conditions are not met so as to ensure the safety of facilities, the blind plate valve is provided with an operation box for controlling the on-off of the blind plate valve, and the cut-off valve and the blind plate valve are both connected with a signal input end of a controller through a signal line to transmit an on-off state signal of the valve to the.
The controller is connected with the signal input end of the operation box through a signal wire, the controller inputs a locking signal to the operation box, and simultaneously, the controller is interlocked with conditions set in the PLC, so that automatic cut-off is realized when the conditions are not met, and the safety of facilities is ensured (the general safety interlocking conditions comprise low pressure of media such as air, gas and instrument air sources, and the running states of equipment such as fans and the like).
The cut-off valve is close to one side of the medium pipeline connected with the air source, and the blind plate valve is close to one side of the medium pipeline connected with the air using unit.
The medium pipeline is a gas transportation pipeline.
The utility model has the advantages of can avoid cutting off the problem that valve and blind plate valve can not cut off the position and lead to leaking, system simple structure, simple to operate is convenient for popularize.
Drawings
The following brief descriptions of the contents expressed by each figure and the marks in the figures in the specification of the present invention are as follows:
FIG. 1 is a schematic diagram of a pipeline cut-off monitoring system;
the labels in the above figures are: 1. a pre-valve line; 2. an inter-valve line; 3. a post-valve line; 4. cutting off the valve; 5. a blind plate valve; 6. an operation box; 7. a pressure transmitter; 8. a controller; 9. a display; 10. an alarm.
Detailed Description
The following description of the embodiments with reference to the drawings is intended to illustrate the present invention in further detail, such as the shapes and structures of the components, the mutual positions and connections between the components, the functions and working principles of the components, the manufacturing process, and the operation and use methods, etc., so as to help those skilled in the art understand the present invention more completely, accurately and deeply.
The medium pipeline is a gas transportation pipeline, a cut-off valve 4 and a blind plate valve 5 which are used for controlling the on-off of the medium pipeline are arranged on the medium pipeline, the cut-off valve 4 is close to one side of the medium pipeline connected with a gas source, and the blind plate valve 5 is close to one side of the medium pipeline connected with a gas unit.
The medium pipeline is positioned between the cut-off valve 4 and the blind plate valve 5 and is an inter-valve pipeline 2, a pressure measuring point is designed on the inter-valve pipeline 2 and is used for detecting whether the valve is leaked or closed in place, once the valve is leaked or not closed in place, a pressure transmitter 7 for acquiring a pressure signal in the inter-valve pipeline 2 is installed at the pressure measuring point, the pressure transmitter 7 is connected with a signal input end of a controller 8 through a signal line, a signal output end of the controller 8 is connected with a display 9 and an alarm 10, the display 9 is used for displaying a pressure value behind the valve and is convenient for monitoring by a worker, once the valve is leaked or not closed in place, the pressure display is carried out behind the valve, the alarm 10 is used for alarming, and once the valve is leaked or not closed in place, the alarm 10 can be simultaneously started for alarming.
The cut-off valve 4 is a pneumatic valve, the blind plate valve 5 is an electric valve, the cut-off valve 4 is provided with an operation key for controlling the on-off of the cut-off valve, the blind plate valve 5 is provided with an operation box 6 for controlling the on-off of the blind plate valve, and the cut-off valve 4 and the blind plate valve 5 are both connected with the signal input end of the controller 8 through signal lines to transmit the on-off state signals of the valve to the controller 8. The controller 8 is connected to a signal input terminal of the operation box 6 via a signal line, and the controller 8 inputs a lock signal to the operation box 6. The specific control scheme can be limited according to the specific use environment, for example, the controller 8 sets the starting releasing condition of the blind plate valve 5, the pressure after the valve is less than 0.1kp is used as the starting releasing condition of the blind plate valve 5, and the starting releasing operation of the blind plate valve 5 cannot be operated because the starting condition is not met under the condition that the pressure after the valve is more than or equal to 0.1 kp;
the technical scheme solves the potential safety hazard of gas leakage caused by the fact that the blind plate valve 5 is opened due to the fact that the electric valve is not closed in place as the starting condition of the blind plate valve 5; the safety protection can also be realized under the interlocking condition that a manual valve is adopted to close the pipeline medium and a valve closing in-place signal cannot be taken as a blind plate valve 5.
The present invention has been described above with reference to the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments described above, and that the invention is not limited to the specific embodiments described above, but rather is intended to cover various insubstantial modifications of the inventive method and solution, or its application to other applications without modification.
Claims (5)
1. The utility model provides a monitored control system is cut off to pipeline, is equipped with the cut-off valve and the blind plate valve that are used for controlling the medium pipeline break-make on the medium pipeline, be the pipeline between the valve between cut-off valve and the blind plate valve, its characterized in that: the pressure transmitter is arranged on the pipeline between the valves and used for acquiring an air pressure signal in the pipeline between the valves, the pressure transmitter is connected with the signal input end of the controller through a signal line, and the signal output end of the controller is connected with the display and the alarm.
2. The pipe shut-off monitoring system of claim 1, wherein: the cut-off valve is a pneumatic valve, the blind plate valve is an electric valve, the cut-off valve is provided with an operation key for controlling the on-off of the cut-off valve and is interlocked with conditions set in the PLC, the blind plate valve is provided with an operation box for controlling the on-off of the blind plate valve, and the cut-off valve and the blind plate valve are both connected with the signal input end of the controller through signal lines to transmit on-off state signals of the valve to the controller.
3. The pipe shut-off monitoring system of claim 2, wherein: the controller is connected with a signal input end of the operation box through a signal wire, inputs a locking signal to the operation box and is interlocked with conditions set in the PLC.
4. The pipe shut-off monitoring system according to claim 1, 2 or 3, wherein: the cut-off valve is close to one side of the medium pipeline connected with the air source, and the blind plate valve is close to one side of the medium pipeline connected with the air using unit.
5. The pipe shut-off monitoring system of claim 4, wherein: the medium pipeline is a gas transportation pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020756384.0U CN212430475U (en) | 2020-05-09 | 2020-05-09 | Pipeline cut-off monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020756384.0U CN212430475U (en) | 2020-05-09 | 2020-05-09 | Pipeline cut-off monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212430475U true CN212430475U (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020756384.0U Active CN212430475U (en) | 2020-05-09 | 2020-05-09 | Pipeline cut-off monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212430475U (en) |
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2020
- 2020-05-09 CN CN202020756384.0U patent/CN212430475U/en active Active
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