Regulating valve safety detection system

Abstract

The utility model belongs to the technical field of valve detection, and discloses a safety detection system for a regulating valve, which comprises an induction device, a control center and an execution mechanism, and is characterized in that the induction device is used for detecting the temperature of the rear part of a valve seat, the mechanical vibration of the valve seat and the pressure value of an isolation cavity and converting detected information into electric signals; the executing mechanism is installed on a valve body of the adjusting valve, the executing end of the executing mechanism is located in the isolation cavity, the executing mechanism is configured to adjust the opening degree of the adjusting valve, and the sensing device and the executing mechanism are both connected to the control center. The control center is configured to receive and detect electric signals converted from the temperature of the rear portion of the valve seat, the mechanical vibration of the valve seat and the pressure value of the isolation cavity, and send instructions to the executing mechanism according to the electric signals, so that the opening degree of the adjusting valve is adjusted according to the working state of the adjusting valve. The regulating valve safety detection system disclosed by the utility model can realize all-weather real-time monitoring, saves time and labor cost, and is high in detection efficiency and sufficient in detection.

Description

Technical Field

[0001] This utility model relates to the field of valve testing technology, and in particular to a safety testing system for regulating valves. Background Technology

[0002] Control valves are a crucial component of the pressure control system in natural gas transmission stations and are widely used. During natural gas transmission, temperature and pressure changes significantly affect the valve's operating status. Leaks in the isolation chamber, internal leaks, and ice blockage can severely impact the valve's normal operation and pose certain safety hazards.

[0003] Current methods for detecting natural gas leaks involve manual, periodic visits to gas transmission sites using handheld leak detection equipment. This method is inefficient, prone to missing leaks, and poses certain risks. It is even more difficult to control leaks at unattended stations. Furthermore, pressure changes, such as external leaks, can directly cause transmission shutdowns, and failure to detect and address internal leaks in a timely manner can affect valve maintenance and repair. In addition, manual detection cannot detect anomalies anytime and anywhere, and cannot make timely adjustments, which affects gas transmission efficiency and valve lifespan, and may even cause accidents. Utility Model Content

[0004] The purpose of this invention is to provide a safety detection system for regulating valves, which provides real-time monitoring around the clock, saves time and labor costs, has high detection efficiency, and ensures thorough detection.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A regulating valve safety detection system is installed in a gas transmission system, the gas transmission system including a front pipe section and a rear pipe section, the front pipe section and the rear pipe section being connected by a regulating valve, the pressure value of the front pipe section being greater than that of the rear pipe section, the regulating valve safety detection system comprising:

[0007] The sensing device includes a first temperature transmitter, a vibration transmitter, and a first pressure transmitter. The first temperature transmitter and the vibration transmitter are both installed at the rear of the valve seat of the regulating valve. The first temperature transmitter detects the temperature at the rear of the valve seat and converts the detected temperature information into an electrical signal. The vibration transmitter detects the mechanical vibration of the valve seat and converts it into an electrical signal. The first pressure transmitter is installed in the isolation chamber of the regulating valve and detects the pressure value in the isolation chamber and converts the detected pressure information into an electrical signal. The isolation chamber is independent of the interior of the regulating valve.

[0008] An actuator is mounted on the valve body of the regulating valve, and the actuating end of the actuator is located in the isolation chamber. The actuator is configured to adjust the opening degree of the regulating valve.

[0009] The control center is equipped with an automatic alarm device. The first temperature transmitter, the vibration transmitter, the first pressure transmitter, and the actuator are all connected to the control center. The control center is configured to receive electrical signals from the first temperature transmitter, the vibration transmitter, and the first pressure transmitter and trigger the automatic alarm device based on the electrical signals. The control center is also configured to issue instructions to the actuator.

[0010] Preferably, the sensing device further includes a second temperature transmitter and a third temperature transmitter. The second temperature transmitter is installed on the front pipe section and is used to detect the temperature of the front pipe section and convert the detected temperature information into an electrical signal. The third temperature transmitter is installed on the rear pipe section and is used to detect the temperature of the rear pipe section and convert the detected temperature information into an electrical signal.

[0011] Preferably, the sensing device further includes a second pressure transmitter and a third pressure transmitter. The second pressure transmitter is installed in the front pipe section and is used to detect the pressure in the front pipe section and convert the detected pressure information into an electrical signal. The third pressure transmitter is installed in the rear pipe section and is used to detect the pressure in the rear pipe section and convert the detected pressure information into an electrical signal.

[0012] Preferably, a pressure relief valve is provided inside the isolation chamber, the pressure relief valve connects the isolation chamber to the outside, and the first pressure transmitter is installed on the sensing side of the pressure relief valve.

[0013] Preferably, when the gas supply system stops supplying gas, if the electrical signal of the first temperature transmitter is abnormal, the control center will trigger the first alarm state of the automatic alarm device, and in the first alarm state, a safety warning will be issued.

[0014] Preferably, when the gas supply system stops supplying gas, if the electrical signal of the vibration transmitter is abnormal, the control center will trigger the second alarm state of the automatic alarm device. In the second alarm state, a prompt will be issued to maintain and handle the regulating valve.

[0015] Preferably, under normal gas transmission conditions, if the first pressure transmitter detects an increase in the pressure value of the isolation chamber, the control center triggers the first warning state of the automatic alarm device, and under the first warning state, issues a safety warning.

[0016] Preferably, when the gas transmission system is in normal gas transmission state, after the first warning state is triggered, if the first pressure transmitter detects a drop in the pressure value of the isolation chamber, the control center triggers the second warning state of the automatic alarm device and issues an instruction to the actuator to control the regulating valve to close. In the second warning state, a prompt for maintenance and handling of the regulating valve is issued.

[0017] Preferably, the control center receives the electrical signal from the third pressure transmitter and calculates the leakage amount based on the electrical signal from the third pressure transmitter.

[0018] Preferably, under normal gas transmission conditions, the pressure value of the isolation chamber is atmospheric pressure and is less than the pressure value of the upstream pipe section.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a safety detection system for a control valve, installed in a gas transmission system. The gas transmission system includes a front pipe section and a rear pipe section, connected by a control valve. The pressure value of the front pipe section is higher than that of the rear pipe section. The control valve safety detection system includes a sensing device, an actuator, and a control center. The sensing device includes a first temperature transmitter, a vibration transmitter, and a first pressure transmitter. The first temperature transmitter and the vibration transmitter are both installed at the rear of the control valve seat. The first temperature transmitter detects the temperature at the rear of the valve seat and converts the detected temperature information into an electrical signal. The vibration transmitter detects the mechanical vibration of the valve seat and converts it into an electrical signal. The first pressure transmitter is installed in the isolation chamber of the control valve and detects the pressure value in the isolation chamber and converts the detected pressure information into an electrical signal. The isolation chamber is independent of the inside of the control valve. The actuator is installed in the valve body of the control valve. The actuator is located in the isolation chamber. The actuator is configured to adjust the opening of the control valve. An automatic alarm device is installed in the control center. The first temperature transmitter, vibration transmitter, first pressure transmitter, and actuator are all connected to the control center. The control center receives electrical signals from the first temperature transmitter, vibration transmitter, and first pressure transmitter and triggers the automatic alarm device based on the electrical signals to warn of parts that need adjustment or maintenance, reminding operators to adjust or maintain them in time. The control center can also issue instructions to the actuator based on the above electrical signals to adjust the opening of the control valve. The control valve safety detection system provided by this utility model replaces manual handheld detection, saves time and labor costs, improves detection efficiency, can monitor the working status of the control valve in real time around the clock, detect abnormalities anytime and anywhere, so as to adjust or maintain them in time, avoid affecting the gas transmission efficiency, reduce the risk of damage to the control valve, and has sufficient detection points to avoid missed detections. Attached Figure Description

[0021] Figure 1This is an installation diagram of a regulating valve safety detection system and a gas transmission system provided in an embodiment of this utility model.

[0022] In the picture:

[0023] 10. Front pipe section; 20. Rear pipe section; 30. Control valve; 301. Valve seat; 302. Isolation chamber;

[0024] 11. First temperature transmitter; 12. Vibration transmitter; 13. First pressure transmitter; 14. Second temperature transmitter; 15. Third temperature transmitter; 16. Second pressure transmitter; 17. Third pressure transmitter; 18. Pressure relief valve;

[0025] 2. Execution agency; 3. Control center. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] This embodiment provides a control valve safety detection system that replaces manual handheld inspection, saving time and labor costs, improving detection efficiency, and enabling real-time monitoring of the control valve's operating status around the clock. On the one hand, it can detect abnormalities anytime and anywhere, so as to make timely adjustments or repairs, avoid affecting gas delivery efficiency, and reduce the risk of control valve damage. On the other hand, it has sufficient detection points to avoid missed detections.

[0031] Please see Figure 1 This embodiment provides a regulating valve safety detection system installed in a gas transmission system. The gas transmission system includes a front pipe section 10 and a rear pipe section 20, which are connected by a regulating valve 30. The front pipe section 10 is near the valve seat 301, and the rear pipe section 20 is near the valve seat 301. The front pipe section 10 is under a higher pressure to ensure that the gas can flow smoothly downstream through the regulating valve 30. After the gas enters the regulating valve 30 and then the rear pipe section 20, the pressure decreases. The specific decrease depends on the valve opening, flow rate requirement, and system design. Specifically, the regulating valve 30 includes a valve seat 301, and the valve core can circumferentially abut against the valve seat 301 to block the space in front of and behind the valve seat 301. The opening is adjusted by axial movement of the valve core or rotation about its own axis.

[0032] Furthermore, the regulating valve 30 has an isolation chamber 302 inside. The isolation chamber 302 is independent of other areas inside the regulating valve 30, and the isolation chamber 302 is filled with inert gas. The pressure value is equal to atmospheric pressure and less than the pressure value of the upstream pipe section, and it has the following functions:

[0033] To reduce leakage, the isolation chamber 302 isolates the moving parts (such as the valve stem) of the control valve 30 from the internal gas, reducing potential leakage paths between the internal gas and the outside world and improving the sealing performance of the control valve 30.

[0034] For special working conditions, such as high temperature, low temperature or corrosive media, the isolation chamber 302 acts as a barrier to protect the actuator 2 (such as pneumatic or electric actuators) from the effects of harsh conditions, extend the service life of the actuator 2, and improve the reliability of the system.

[0035] Pressure balancing: Under high pressure differential conditions, the isolation chamber 302 helps balance the pressure on both sides of the valve core, making the operation of the regulating valve 30 more stable, while reducing the stress on the valve core, reducing wear and increasing the service life of the valve core.

[0036] Temperature isolation: If the internal gas has an extremely high temperature, the isolation chamber 302 can act as a heat insulation to prevent heat from being transferred to other parts of the valve, especially temperature-sensitive components, ensuring the normal operation of the actuator 2 and other accessories.

[0037] This embodiment provides a safety detection system for a control valve, including a sensing device, a control center 3, and an actuator 2. The sensing device is used to detect the temperature at the rear of the valve seat 301, the mechanical vibration of the valve seat 301, and the pressure value of the isolation chamber 302, and converts the detected information into electrical signals. The actuator 2 is installed on the valve body of the control valve 30, and the actuating end of the actuator 2 is located in the isolation chamber 302. The actuator 2 is configured to adjust the opening degree of the control valve 30. Both the sensing device and the actuator 2 are connected to the control center 3. The control center 3 is configured to receive the electrical signals converted from the temperature at the rear of the valve seat 301, the mechanical vibration of the valve seat 301, and the pressure value of the isolation chamber 302, and issue instructions to the actuator 2 according to the above electrical signals, thereby adjusting the opening degree of the control valve 30 according to the working state of the control valve 30.

[0038] The sensing device includes a first temperature transmitter 11, which is connected to the control center 3. The first temperature transmitter 11 is installed at the rear of the valve seat 301 of the regulating valve 30, and is used to detect the temperature at the rear of the valve seat 301 and convert the detected temperature information into an electrical signal, and further transmit the electrical signal to the control center 3.

[0039] According to the Joule-Thomson effect, when high-pressure gas passes through a narrow opening or valve, rapid decompression occurs, causing a sharp drop in gas temperature. This is because the gas does work on its surroundings during adiabatic expansion, reducing its internal energy and thus lowering its temperature. If the gas supply stops in the gas transmission system, leakage from regulating valve 30 causes the gas temperature in the downstream pipe section 20 to drop below the ambient dew point temperature. Moisture in the air condenses into frost or ice. Even if the leakage is small, if the leakage persists long enough, sufficient cold energy will gradually accumulate to form visible frost. If the leakage is large, it can easily lead to ice blockage.

[0040] Therefore, in this embodiment, by installing a first temperature transmitter 11 at the rear of the valve seat 301 of the regulating valve 30, the control center 3 can determine whether the regulating valve 30 is leaking based on the electrical signal of the first temperature transmitter 11. The detection is accurate, saves time and labor costs, has high detection efficiency, and can monitor the working status of the regulating valve 30 in real time around the clock.

[0041] The sensing device also includes a vibration transmitter 12, which is connected to the control center 3. The vibration transmitter 12 is also installed at the rear of the valve seat 301 of the regulating valve 30. It is used to detect the mechanical vibration of the valve seat 301 and convert it into an electrical signal, and further transmit the electrical signal to the control center 3.

[0042] If gas supply stops in the gas delivery system, leakage in the control valve 30 can cause turbulence or unstable flow patterns in the vicinity of the control valve 30, resulting in local vibration.

[0043] Therefore, in this embodiment, by installing a vibration transmitter 12 at the rear of the valve seat 301 of the regulating valve 30, the control center 3 can determine whether the regulating valve 30 is leaking based on the electrical signal of the vibration transmitter 12. With the assistance of the first temperature transmitter 11, the accuracy of the detection is further improved.

[0044] The sensing device also includes a first pressure transmitter 13, which is connected to the control center 3 and installed in the isolation chamber 302. The first pressure transmitter 13 is used to detect the pressure value of the isolation chamber 302 and convert the detected pressure information into an electrical signal, and further transmit the electrical signal to the control center 3.

[0045] Under normal gas transmission conditions in the gas transmission system, the internal pressure of the isolation chamber 302 is equal to atmospheric pressure and less than the pressure of the upstream pipe section 10. Therefore, when the isolation chamber 302 leaks, the gas inside the upstream pipe section 10 will enter the isolation chamber 302, causing the pressure of the isolation chamber 302 to rise.

[0046] Therefore, in this embodiment, by installing a first pressure transmitter 13 in the isolation chamber 302, the control center 3 can determine whether the isolation chamber 302 is leaking based on the electrical signal of the first pressure transmitter 13. The detection is accurate, saves time and labor costs, has high detection efficiency, and can monitor the working status of the regulating valve 30 in real time around the clock.

[0047] Furthermore, a pressure relief valve 18 is provided inside the isolation chamber 302, which connects the isolation chamber 302 to the outside. When the pressure value of the isolation chamber 302 reaches a set value, it is discharged through the pressure relief valve 18. More preferably, the first pressure transmitter 13 is installed on the sensing side of the pressure relief valve 18.

[0048] Control center 3 is located in the station control room and is equipped with an automatic alarm device. When the electrical signal received by control center 3 is abnormal, the automatic alarm device is triggered to warn the parts that need to be adjusted or repaired, and remind the operators to adjust or repair them in time.

[0049] This embodiment provides a safety detection system for a regulating valve under normal gas transmission system conditions:

[0050] If the first pressure transmitter 13 received by the control center 3 detects an increase in the pressure value of the isolation chamber 302, it proves that the isolation chamber 302 is leaking and the high-pressure gas of the front pipe section 10 enters the isolation chamber 302. The control center 3 triggers the first warning state of the automatic alarm device. Under the first warning state, the automatic alarm device issues an alarm prompt to remind maintenance personnel to pay attention to safety.

[0051] In the first warning state, the pressure value of the isolation chamber 302 has not yet reached the set value of the pressure relief valve 18, and the gas will not leak out. As the high-pressure gas from the front pipe section 10 continues to enter the isolation chamber 302, the pressure value of the isolation chamber 302 reaches the set value of the pressure relief valve 18, and the gas in the isolation chamber 302 leaks out through the pressure relief valve 18. The first pressure transmitter 13 detects the pressure drop in the isolation chamber 302, and the control center 3 triggers the second warning state of the automatic alarm device. In the second warning state, the control center 3 issues an instruction to the actuator 2 to control the regulating valve 30 to close and stop the gas supply. The automatic alarm device issues an alarm prompt to remind maintenance personnel to maintain and handle the regulating valve 30.

[0052] This embodiment provides a safety detection system for a regulating valve when the gas supply system is stopped:

[0053] If the electrical signal received by the control center 3 from the first temperature transmitter 11 is abnormal, it indicates that the gas temperature near the valve seat 301 has decreased and the regulating valve 30 is leaking. The control center 3 triggers the first alarm state of the automatic alarm device. Under the first alarm state, the automatic alarm device issues an alarm prompt to remind maintenance personnel to pay attention to safety.

[0054] If the electrical signal received by the vibration transmitter 12 from the control center 3 is abnormal, it indicates that the gas temperature near the valve seat 301 has decreased and the regulating valve 30 is leaking. The control center 3 triggers the second alarm state of the automatic alarm device. In the second alarm state, the leakage is large, and the automatic alarm device issues an alarm prompt to remind maintenance personnel to maintain and handle the regulating valve 30.

[0055] It should be noted that the information issued by the first warning state, the second warning state, the first alarm state, and the second alarm state are different, in order to alert the specific parts that need to be adjusted or repaired.

[0056] Preferably, the sensing device further includes a second temperature transmitter 14 and a third temperature transmitter 15. Both the second temperature transmitter 14 and the third temperature transmitter 15 are connected to the control center 3. The second temperature transmitter 14 is installed on the front pipe section 10 and is used to detect the temperature of the front pipe section 10 and convert the detected temperature information into an electrical signal, and further transmit it to the control center 3. The third temperature transmitter 15 is installed on the rear pipe section 20 and is used to detect the temperature of the rear pipe section 20 and convert the detected temperature information into an electrical signal, and further transmit it to the control center 3.

[0057] When the gas transmission system is stopped, leakage in the regulating valve 30 will cause significant temperature changes in the upstream pipe section 10 and the downstream pipe section 20.

[0058] Therefore, this embodiment uses a second temperature transmitter 14 and a third temperature transmitter 15 to assist in detecting whether the regulating valve 30 is leaking, thereby further improving the accuracy of the detection.

[0059] The sensing device also includes a second pressure transmitter 16 and a third pressure transmitter 17. Both the second pressure transmitter 16 and the third pressure transmitter 17 are connected to the control center 3. The second pressure transmitter 16 is installed on the front pipe section 10 and is used to detect the pressure of the front pipe section 10 and convert the detected pressure information into an electrical signal, and further transmit it to the control center 3. The third pressure transmitter 17 is installed on the rear pipe section 20 and is used to detect the pressure of the rear pipe section 20 and convert the detected pressure information into an electrical signal, and further transmit it to the control center 3.

[0060] When the gas transmission system is stopped, leakage in regulating valve 30 will cause significant pressure changes in the upstream pipe section 10 and the downstream pipe section 20.

[0061] Therefore, this embodiment uses a second pressure transmitter 16 and a third pressure transmitter 17 to assist in detecting whether the regulating valve 30 is leaking, thereby further improving the accuracy of the detection.

[0062] Furthermore, when the gas transmission system stops transmitting gas, the control center 3 can also calculate the leakage of the regulating valve 30 by receiving the electrical signal from the third pressure transmitter 17.

[0063] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A safety detection system for a regulating valve, installed in a gas transmission system, the gas transmission system comprising a front pipe section (10) and a rear pipe section (20), the front pipe section (10) and the rear pipe section (20) being connected by a regulating valve (30), the pressure value of the front pipe section (10) being greater than that of the rear pipe section (20), characterized in that, The control valve safety detection system includes: The sensing device includes a first temperature transmitter (11), a vibration transmitter (12), and a first pressure transmitter (13). The first temperature transmitter (11) and the vibration transmitter (12) are both installed at the rear of the valve seat (301) of the regulating valve (30). The first temperature transmitter (11) is used to detect the temperature at the rear of the valve seat (301) and convert the detected temperature information into an electrical signal. The vibration transmitter (12) is used to detect the mechanical vibration of the valve seat (301) and convert it into an electrical signal. The first pressure transmitter (13) is installed in the isolation chamber (302) of the regulating valve (30). The first pressure transmitter (13) is used to detect the pressure value of the isolation chamber (302) and convert the detected pressure information into an electrical signal. The isolation chamber (302) is independent of the interior of the regulating valve (30). An actuator (2) is mounted on the valve body of the regulating valve (30), and the actuating end of the actuator (2) is located in the isolation chamber (302). The actuator (2) is configured to adjust the opening degree of the regulating valve (30). The control center (3) is equipped with an automatic alarm device. The first temperature transmitter (11), the vibration transmitter (12), the first pressure transmitter (13) and the actuator (2) are all connected to the control center (3). The control center (3) is configured to receive electrical signals from the first temperature transmitter (11), the vibration transmitter (12) and the first pressure transmitter (13) and trigger the automatic alarm device according to the electrical signals. The control center (3) is also configured to issue instructions to the actuator (2).

2. The safety detection system for a regulating valve according to claim 1, characterized in that, The sensing device further includes a second temperature transmitter (14) and a third temperature transmitter (15). The second temperature transmitter (14) is installed on the front pipe section (10) and is used to detect the temperature of the front pipe section (10) and convert the detected temperature information into an electrical signal. The third temperature transmitter (15) is installed on the rear pipe section (20) and is used to detect the temperature of the rear pipe section (20) and convert the detected temperature information into an electrical signal.

3. The safety detection system for a regulating valve according to claim 1, characterized in that, The sensing device further includes a second pressure transmitter (16) and a third pressure transmitter (17). The second pressure transmitter (16) is installed on the front pipe section (10) and is used to detect the pressure of the front pipe section (10) and convert the detected pressure information into an electrical signal. The third pressure transmitter (17) is installed on the rear pipe section (20) and is used to detect the pressure of the rear pipe section (20) and convert the detected pressure information into an electrical signal.

4. The safety detection system for a regulating valve according to claim 1, characterized in that, A pressure relief valve (18) is provided inside the isolation chamber (302). The pressure relief valve (18) connects the isolation chamber (302) to the outside. The first pressure transmitter (13) is installed on the sensing side of the pressure relief valve (18).

5. The safety detection system for a regulating valve according to claim 1, characterized in that, When the gas supply system stops supplying gas, the electrical signal of the first temperature transmitter (11) is abnormal. The control center (3) triggers the first alarm state of the automatic alarm device. In the first alarm state, a safety warning is issued.

6. The safety detection system for a regulating valve according to claim 1, characterized in that, When the gas supply system stops supplying gas, the electrical signal of the vibration transmitter (12) is abnormal. The control center (3) triggers the second alarm state of the automatic alarm device. In the second alarm state, a prompt is issued to maintain and handle the regulating valve (30).

7. The safety detection system for a regulating valve according to claim 1, characterized in that, If the first pressure transmitter (13) detects an increase in the pressure value of the isolation chamber (302) under normal gas transmission conditions, the control center (3) triggers the first warning state of the automatic alarm device, and under the first warning state, issues a safety warning.

8. The safety detection system for a regulating valve according to claim 7, characterized in that, When the gas transmission system is in normal gas transmission state, after triggering the first warning state, if the first pressure transmitter (13) detects a drop in the pressure value of the isolation chamber (302), the control center (3) triggers the second warning state of the automatic alarm device and issues an instruction to the actuator (2) to control the regulating valve (30) to close. In the second warning state, a prompt to maintain and handle the regulating valve (30) is issued.

9. A safety detection system for a regulating valve according to claim 3, characterized in that, The control center (3) receives the electrical signal from the third pressure transmitter (17) and calculates the leakage amount based on the electrical signal from the third pressure transmitter (17).

10. A safety detection system for a regulating valve according to any one of claims 1-9, characterized in that, Under normal gas transmission conditions, the pressure value of the isolation chamber (302) is atmospheric pressure and is less than the pressure value of the front pipe section (10).

Images