CN111664285A - Stop valve auxiliary turn-off device and method based on network control - Google Patents
Stop valve auxiliary turn-off device and method based on network control Download PDFInfo
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- CN111664285A CN111664285A CN202010502279.9A CN202010502279A CN111664285A CN 111664285 A CN111664285 A CN 111664285A CN 202010502279 A CN202010502279 A CN 202010502279A CN 111664285 A CN111664285 A CN 111664285A
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- controller
- stop valve
- running state
- detection data
- shut
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
Abstract
The invention relates to a stop valve auxiliary shutoff device and a method based on network control, comprising a controller, a stop valve and a pipeline running state detection module; the pipeline running state detection module is used for inputting detection data to the controller; the controller is used for controlling the stop valve; meanwhile, the system is also provided with a network module which can communicate with the background control center; the network module is in communication connection with the controller; the network module is used for transmitting the detection data and/or the pipeline running state information in the controller to the background control center; the network module is also used for receiving detection data and/or pipeline running state information of the adjacent stop valve auxiliary shutoff device sent by the background control center; the controller is also used for sending a closing command or a normal working keeping command to the stop valve according to the detection data of the adjacent stop valve auxiliary closing device and/or the pipeline running state information. The invention carries out data comprehensive judgment through the network module, thereby accurately judging whether the pipeline has safety problems.
Description
Technical Field
The invention relates to an auxiliary shutoff device of a shutoff valve, in particular to an auxiliary shutoff device of a shutoff valve based on network control and a method thereof.
Background
In the chemical industry fields such as natural gas, in order to reduce economy and the loss of lives and property when the pipeline is revealed, need install unmanned on duty's the control unit on the stop valve of key position. The control unit continuously monitors parameters such as air pressure in the pipeline through a mechanical or electronic device and judges whether an abnormal condition that a valve needs to be closed occurs or not according to a preset algorithm. When the preset conditions are met, the control unit must automatically close the valve.
Since explosion and burning caused by pipe leakage may damage cables and network facilities outside the valve, the control unit on the valve must be able to autonomously determine and operate without relying on an external power supply and network.
Taking the natural gas industry as an example, in the last 20 years, the traditional unattended control unit has dozens of misoperation operations every year on average, and great economic loss is caused. The reason for this may be a temporary mechanical component or electronic device failure caused by severe weather such as lightning, or a temporary abnormal fluid state in the pipe, but the fundamental cause thereof is not clear nor is there a clear solution because of irreproducibility of the false shutdown event.
Disclosure of Invention
The first purpose of the invention is to provide a stop valve auxiliary shut-off device based on network control, which is formed by
The technical scheme for realizing the first purpose of the invention is as follows: the invention relates to a stop valve auxiliary turn-off device based on network control, which comprises a controller, a stop valve and a pipeline running state detection module; the stop valve and the pipeline running state detection module are electrically connected with the controller; the pipeline running state detection module is used for inputting detection data to the controller; the controller sends a turn-off command or a normal working keeping command to the stop valve according to the detection data; meanwhile, the system is also provided with a network module which can communicate with the background control center; the network module is in communication connection with the controller;
the background control center is used for receiving detection data and/or pipeline running state information from the network module;
the network module is used for transmitting the detection data and/or the pipeline running state information in the controller to the background control center; the network module is also used for receiving detection data and/or pipeline running state information of the adjacent stop valve auxiliary shutoff device sent by the background control center;
the controller is also used for sending a closing command or a normal working keeping command to the stop valve according to the detection data of the adjacent stop valve auxiliary closing device and/or the pipeline running state information.
The network module is a wireless transmission module.
And the clock synchronization module is used for calibrating the clock of the controller. The clock synchronization module is calibrated in a GPS (global positioning system), Beidou and other modes.
The pipeline running state detection module is a pressure transmitter.
The second purpose of the invention is to provide a stop valve auxiliary turn-off method based on network control, which can realize accurate judgment through comprehensive judgment and avoid misjudgment to the maximum extent.
The technical scheme for realizing the second purpose of the invention is as follows: the invention discloses a method for shutting by using a shut-off valve auxiliary shut-off device based on network control, which comprises the following steps:
s1, the controller continuously receives detection data and/or pipeline running state information of the adjacent stop valve auxiliary shutoff devices from the background control center through the network module;
s2, the controller judges whether a safety problem occurs or not according to the detection data and/or the pipeline running state information of the corresponding stop valve auxiliary shut-off device and the adjacent stop valve auxiliary shut-off device; if yes, the controller sends a turn-off command to the stop valve; if not, sending a command of keeping normal work to the stop valve.
The controller determines whether a safety problem occurs according to the following method:
the controller judges whether a safety problem occurs or not according to the detection data of the auxiliary shutoff device of the stop valve and/or the pipeline running state information corresponding to the controller;
if not, judging that no safety problem occurs;
if so, the controller analyzes and receives detection data and/or pipeline running state information of the adjacent stop valve auxiliary shutoff devices from the background control center; if the adjacent stop valve auxiliary shutoff devices are in a safe state through analysis, judging that no safety problem occurs; and if at least one of the adjacent stop valve auxiliary shutoff devices is in an unsafe state through analysis, judging that a safety problem occurs.
Meanwhile, the method also has the following working mode selection:
in a set time period, when the network module can effectively communicate with the background control center, the controller is in a comprehensive judgment working mode; in a set time period, when the network module and the background control center cannot effectively communicate, the controller is in a single judgment working mode;
in the comprehensive judgment operation mode, steps S1 and S2 are executed;
when the device is in the single judgment working mode, the controller judges whether a safety problem occurs or not only through the detection data and/or the pipeline running state information of the auxiliary shutoff device of the corresponding stop valve; if yes, the controller sends a turn-off command to the stop valve; if not, sending a command of keeping normal work to the stop valve.
The invention has the positive effects that: (1) according to the invention, the working conditions of the adjacent stop valve auxiliary shutoff devices can be collected through the network module, and whether the safety alarm sent by the current stop valve auxiliary shutoff device is false alarm or not can be accurately judged through comparison and judgment, so that the economic loss caused by false alarm is reduced.
(2) In order to ensure the further safety of the pipeline, when the network module and the background control center cannot effectively communicate, the system can be switched to the traditional turn-off mode, namely whether the pipeline is safe or not is judged only by the detection data of the current pipeline running state detection module.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a schematic diagram of the electrical connection of the network control based auxiliary shut-off device of the shut-off valve of the present invention;
fig. 2 is a flowchart of a cut-off valve auxiliary shutdown method based on network control according to the present invention.
Detailed Description
Referring to fig. 1, the stop valve auxiliary shut-off device based on network control in the invention comprises a controller 1, a stop valve 2 and a pipeline running state detection module 3; the stop valve 2 and the pipeline running state detection module 3 are both electrically connected with the controller 1; the pipeline running state detection module 3 is used for inputting detection data to the controller 1; the controller 1 sends a turn-off command or a normal working keeping command to the stop valve 2 according to the judgment of the detection data; the method is characterized in that: the device also comprises a network module 5 which can communicate with the background control center 4; the network module 5 is in communication connection with the controller 1;
the background control center 4 is used for receiving detection data and/or pipeline running state information from the network module 5;
the network module 5 is used for transmitting the detection data and/or the pipeline running state information in the controller 1 to the background control center 4; the network module 5 is also used for receiving detection data and/or pipeline running state information of the adjacent stop valve auxiliary shutoff device sent by the background control center 4;
the controller 1 is further configured to issue a shut-off command or a normal operation maintaining command to the shut-off valve according to the detection data of the adjacent auxiliary shut-off device of the shut-off valve and/or the pipe running state information.
And also a clock synchronization module 6 for calibrating the clock of the controller 1.
The pipeline running state detection module 3 is a pressure transmitter.
Referring to fig. 2, the method for shutting down by using the above network control-based auxiliary shut-off device of a shut-off valve according to the present invention includes the following steps:
s1, the controller 1 continuously receives the detection data and/or the pipeline running state information of the adjacent stop valve auxiliary shutoff device from the background control center 4 through the network module 5;
s2, the controller 1 judges whether a safety problem occurs or not according to the detection data and/or the pipeline running state information of the corresponding stop valve auxiliary shut-off device and the adjacent stop valve auxiliary shut-off device; if yes, the controller 1 sends a turn-off command to the stop valve 2; if not, a command for keeping normal operation is sent to the stop valve 2.
The controller 1 determines whether a safety problem occurs according to the following method:
the controller 1 judges whether a safety problem occurs or not according to detection data of a corresponding stop valve auxiliary shutoff device and/or pipeline running state information;
if not, judging that no safety problem occurs;
if yes, the controller 1 analyzes and receives detection data and/or pipeline running state information of the adjacent stop valve auxiliary shutoff devices from the background control center 4; if the adjacent stop valve auxiliary shutoff devices are in a safe state through analysis, judging that no safety problem occurs; and if at least one of the adjacent stop valve auxiliary shutoff devices is in an unsafe state through analysis, judging that a safety problem occurs.
Meanwhile, the method also has the following working mode selection:
in a set time period, when the network module 5 and the background control center 4 can effectively communicate, the controller 1 is in a comprehensive judgment working mode; in a set time period, when the network module 5 and the background control center 4 cannot perform effective communication, the controller 1 is in a single judgment working mode;
in the comprehensive judgment operation mode, steps S1 and S2 are executed;
when the controller is in the single judgment working mode, the controller 1 judges whether a safety problem occurs only through the detection data and/or the pipeline running state information of the auxiliary shutoff device of the corresponding stop valve; if yes, the controller 1 sends a turn-off command to the stop valve 2; if not, a command for keeping normal operation is sent to the stop valve 2.
The controller 1 generally employs a programmable PLC including a processor, a memory, and a program stored in the memory and called for by the processor, the program including the steps of the shut-down method described above. The controller 1 is provided with an operation panel for an operator to set execution parameters.
Examples are as follows:
from historical data and summary of experience, we measured based on the following data:
the length of the pipeline between the two shut-off valves 2 is about 30 km;
after a severe accident such as explosion occurs on a pipeline, the average valve closing time of the two stop valves 2 is 5 minutes after the accident;
the shut-off valve 2 is set with a shut-off threshold of: a pressure drop per minute of more than 150 KPa;
the detection data sampling period set by the stop valve 2 is as follows: one minute (60 seconds), namely, taking the pipeline pressure data of one minute as a calculation window, and judging whether the pipeline leaks;
the valve closing delay time of the stop valve 2 is two minutes (120 seconds), namely the detection data reaches the valve closing condition and then is continuously monitored for two minutes, and if the problem still exists, the valve closing action is executed
According to the above data, when the pipeline leaks, the transmission speed of the pressure fluctuation in the pipeline, which can be detected by the stop valve 2, can be calculated according to the following steps:
the propagation time from the leakage point to a single valve is total time-window time-delay time is 5 min-1 min-2 min is 2 min;
the total propagation time from the leakage point to the individual valve is 2min 4 min;
the average propagation speed is 30km/4min 125 m/s.
After the scheme of the embodiment is used, the propagation speed of the pressure fluctuation and the propagation time of the leakage point to a single valve are not changed. Depending on the position of the leakage point in the pipeline, it can be calculated in two cases:
in the best case: the leakage point is right in the middle of the two stop valves;
worst case: the leakage point is very close to the shut-off valve on one side (e.g. less than 1 km) and close to the length of the pipeline (30 km) from the shut-off valve on the other side.
In the best case, the stop valves 2 on both sides of the leakage point detect the pressure drop for two minutes (2min 15 km/125 m/s), synchronized by the network module 5, the stop valves 2 being controlled according to: (1) the pressure of the valve is reduced; (2) the fact that the pressure of the adjacent stop valve 2 drops enables a determination that a leak has occurred, and the stop valve 2 can be immediately shut off (or a delay time, such as 30 seconds, can be set according to actual demand).
Assuming a network communication delay of 5 seconds, in this case, there is only 125 seconds between the closing action of the two-sided shutoff valve 2 and the occurrence of a pipe leak.
In the worst case, the stop valve 2 closest to the leakage point can immediately detect the pressure drop, while the stop valve 2 further away from the leakage point takes four minutes (4 min: 30 km/125 m/s). After the shutoff valve 2 far away obtains the abnormal pressure data, through network synchronization, two shutoff valves 2 can close the shutoff valve 2 synchronously (the network delay is set within 5 seconds) within 245 seconds (4m +5 seconds) after the explosion occurs.
In the worst case, the response time is better than that of the unmounted embodiment. In the best case, the response time of the installed embodiment is saved by half compared with the uninstalled one.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The stop valve auxiliary shut-off device based on network control comprises a controller (1), a stop valve (2) and a pipeline running state detection module (3); the stop valve (2) and the pipeline running state detection module (3) are electrically connected with the controller (1); the pipeline running state detection module (3) is used for inputting detection data to the controller (1); the controller (1) sends a shutdown command or a normal working command to the stop valve (2) according to the judgment of the detection data; the method is characterized in that: the system also comprises a network module (5) which can communicate with the background control center (4); the network module (5) is in communication connection with the controller (1);
the background control center (4) is used for receiving detection data and/or pipeline running state information from the network module (5);
the network module (5) is used for transmitting the detection data and/or the pipeline running state information in the controller (1) to the background control center (4); the network module (5) is also used for receiving detection data and/or pipeline running state information of the adjacent stop valve auxiliary shutoff device sent by the background control center (4);
the controller (1) is also used for sending a shut-off command or a normal working command to the shut-off valve according to the detection data of the adjacent shut-off valve auxiliary shut-off device and/or the pipeline running state information.
2. The network control based cut-off valve auxiliary shut-off device according to claim 1, characterized in that: also included is a clock synchronization module (6) for calibrating the clock of the controller (1).
3. The network control based cut-off valve auxiliary shut-off device according to claim 1, characterized in that: the pipeline running state detection module (3) is a pressure transmitter.
4. The shut-off method using the network control-based shut-off valve auxiliary shut-off device according to claim 1, characterized by comprising the steps of:
s1, the controller (1) continuously receives detection data and/or pipeline running state information of the adjacent stop valve auxiliary shut-off device from the background control center (4) through the network module (5);
s2, the controller (1) judges whether a safety problem occurs or not according to the detection data and/or the pipeline running state information of the corresponding stop valve auxiliary shut-off device and the adjacent stop valve auxiliary shut-off device; if yes, the controller (1) sends a turn-off command to the stop valve (2); if not, a command for keeping normal work is sent to the stop valve (2).
5. The method of shutdown as claimed in claim 4, characterized in that: the controller (1) determines whether a safety problem occurs according to the following method:
the controller (1) judges whether a safety problem occurs or not according to detection data of a corresponding stop valve auxiliary shutoff device and/or pipeline running state information;
if not, judging that no safety problem occurs;
if yes, the controller (1) analyzes and receives detection data and/or pipeline running state information of an adjacent stop valve auxiliary shutoff device from a background control center (4); if the adjacent stop valve auxiliary shutoff devices are in a safe state through analysis, judging that no safety problem occurs; and if at least one of the adjacent stop valve auxiliary shutoff devices is in an unsafe state through analysis, judging that a safety problem occurs.
6. The method of shutdown as claimed in claim 5, characterized in that: also has the following working mode selection:
in a set time period, when the network module (5) and the background control center (4) can effectively communicate, the controller (1) is in a comprehensive judgment working mode; in a set time period, when the network module (5) and the background control center (4) cannot effectively communicate, the controller (1) is in a single judgment working mode;
in the comprehensive judgment operation mode, steps S1 and S2 are executed;
when the device is in a single judgment working mode, the controller (1) judges whether a safety problem occurs or not only through detection data and/or pipeline running state information of the auxiliary shutoff device of the corresponding stop valve; if yes, the controller (1) sends a turn-off command to the stop valve (2); if not, a command for keeping normal work is sent to the stop valve (2).
7. The method of shutdown according to claim 6, characterized in that: the cut-off valve auxiliary shut-off device based on network control further comprises a clock synchronization module (6) for calibrating the clock of the controller (1).
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| CN202010502279.9A CN111664285B (en) | 2020-06-04 | 2020-06-04 | Stop valve auxiliary turn-off device and method based on network control |
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| CN202010502279.9A CN111664285B (en) | 2020-06-04 | 2020-06-04 | Stop valve auxiliary turn-off device and method based on network control |
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