CN205941681U - DC voltage detection system for ESD in gas transmission station - Google Patents

Abstract

The utility model discloses a direct current voltage detecting system of ESD in gas transmission station field belongs to oil gas warehousing and transportation field. The direct current voltage detection system of ESD in this gas transmission station field includes: the device comprises a direct-current voltage acquisition module, a field display module, a main control module and an upper computer; the system can acquire the direct current voltage of the electromagnetic valve in the ESD through the direct current voltage acquisition module, and display the direct current voltage in real time through the field display module; when the direct current voltage is not in the preset voltage range, an alarm signal can be sent out through the upper computer. Therefore, the utility model provides a direct voltage detecting system can realize the real-time detection and the demonstration to the direct voltage of solenoid valve in the ESD to have the function of warning suggestion, this testing process need not staff manually operation, has simplified the step that detects, has reduced the potential safety hazard. The utility model is used for detect the direct current voltage of ESD in the gas transmission station field.

Description

DC voltage detection system for ESD in gas transmission station

technical field

The utility model relates to the field of oil and gas storage and transportation, in particular to an ESD DC voltage detection system in a gas transmission station.

Background technique

The emergency shutdown control system (English: Emergency Shutdown Device; ESD for short) is a safety protection system used to reduce the risk of the production process. In the field of oil and gas storage and transportation, when a major accident occurs in a gas transmission station or a process equipment block, ESD can automatically cut off the upstream gas and the downstream natural gas, and at the same time open the valve of the main bypass to vent the protected area Natural gas to prevent further expansion of the accident and protect the safety of process equipment and staff in the station. Since the DC voltage operation of the solenoid valve in the ESD actuator will directly affect the control effect of the valve in the gas transmission station, it is an important indicator for judging whether the ESD is operating normally. Therefore, it is necessary to regularly detect the DC voltage of the solenoid valve in the ESD .

In the related art, the detection of the DC voltage of the electromagnetic valve in the ESD is generally performed by the staff manually opening the junction box and testing with a multimeter. The detection operation of the DC voltage is cumbersome and will damage the electronic equipment in the gas transmission station. The explosion-proof environment has certain potential safety hazards.

Utility model content

In order to solve the problem of relatively cumbersome operations in the related art when detecting the DC voltage of the electromagnetic valve in the ESD, the utility model provides a DC voltage detection system for the ESD in the gas transmission station. Described technical scheme is as follows:

The utility model provides a DC voltage detection system for ESD in a gas transmission station. The DC voltage detection system includes: a DC voltage acquisition module, an on-site display module, a main control module and a host computer;

The DC voltage collection module is electrically connected to the solenoid valve in the ESD, and is used to collect the DC voltage of the solenoid valve in the ESD, and sends the collected DC voltage to the on-site display module and the main control module;

The on-site display module is used to display the DC voltage;

The main control module is used to send the DC voltage to the host computer, and send an alarm command to the host computer when the DC voltage is not within a preset voltage range;

The upper computer is used for displaying the DC voltage, and sending an alarm signal according to the alarm instruction.

Optionally, the DC voltage detection system further includes: a signal conversion module;

The signal conversion module is electrically connected to the DC voltage acquisition module and the main control module respectively;

The DC voltage acquisition module is further configured to send the acquired DC voltage to the signal conversion module;

The signal conversion module is configured to convert the DC voltage into a digital signal and send it to the main control module.

Optionally, the DC voltage detection system further includes: a switch;

The upper computer establishes a communication connection with the main control module through the switch;

The host computer is further configured to send a preset voltage range to the main control module through the switch.

Optionally, the DC voltage acquisition module includes two input terminals;

The two input ends are respectively connected to the positive pole and the negative pole of the solenoid valve.

Optionally, the DC voltage acquisition module includes an isolation amplifier circuit and an analog-to-digital conversion circuit;

The isolation amplifier circuit is used to amplify the collected DC voltage;

The analog-to-digital conversion circuit is used to convert the collected DC voltage into a digital signal and send it to the on-site display module.

Optionally, the DC voltage detection system also includes: a surge protector;

The surge protector is respectively connected with the DC voltage acquisition module and the signal conversion module, and is used for shunting the surge in the DC voltage detection system.

Optionally, the DC voltage detection system further includes: an isolator;

The isolator is respectively connected with the surge protector and the signal conversion module, and is used for isolating the input signal, output signal and power signal in the DC voltage detection system.

Optionally, the ESD includes at least two power supplies, and the DC voltage detection system further includes: a switch;

The switch is electrically connected to the at least two power supplies and the solenoid valve respectively;

The switching switch is used to control the power-on state of each power supply and the electromagnetic valve in the ESD, and the power-on state includes power supply or power-off.

Optionally, the on-site display module includes a liquid crystal display.

Optionally, the host computer includes a display and an audible and visual alarm.

The beneficial effects brought by the technical solution provided by the utility model are:

The utility model provides a DC voltage detection system for ESD in a gas transmission station. The DC voltage detection system includes: a DC voltage acquisition module, a field display module, a main control module and a host computer; The module collects the DC voltage of the solenoid valve in the ESD, and displays the DC voltage in real time through the on-site display module; when the DC voltage is not within the preset voltage range, an alarm signal can also be sent through the host computer. Therefore, the DC voltage detection system provided by the utility model can realize the real-time detection and display of the DC voltage of the electromagnetic valve in the ESD, and has the function of warning and prompting. The impact of the explosion-proof environment not only simplifies the detection steps, but also reduces potential safety hazards.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural diagram of a DC voltage detection system for ESD in a gas transmission station provided by an embodiment of the present invention;

Fig. 2 is the structural representation of the DC voltage detection system of another kind of ESD in the gas transmission station that the utility model embodiment provides;

Fig. 3 is a schematic structural diagram of another DC voltage detection system for ESD in a gas transmission station provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a DC voltage acquisition module provided by an embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of an ESD DC voltage detection system in a gas transmission station provided by an embodiment of the present invention. As shown in Fig. 1, the DC voltage detection system includes: a DC voltage acquisition module 01, and an on-site display module 02 , main control module 03 and host computer 04.

The DC voltage acquisition module 01 is electrically connected with the solenoid valve (not shown in Figure 1) in the ESD, and is used to collect the DC voltage of the solenoid valve in the ESD, and send the collected DC voltage to the on-site display Module 02 and the main control module 03.

The on-site display module 02 is used to display the DC voltage.

The main control module 03 is used for sending the DC voltage to the host computer 04, and sending an alarm command to the host computer 04 when the DC voltage is not within a preset voltage range.

The host computer 04 is used for displaying the DC voltage, and sending out an alarm signal according to the alarm command.

In summary, the DC voltage detection system provided by the utility model can realize the real-time detection and display of the DC voltage of the solenoid valve in the ESD, and has the function of alarm prompt. The explosion-proof environment of electronic equipment has an impact, which simplifies the detection steps and reduces potential safety hazards.

In the embodiment of the present invention, the upper computer 04 may include a display and an audible and visual alarm. The upper computer can display the DC voltage of the solenoid valve in real time through the display, and can send an alarm signal through the audible and visual alarm. Wherein, the display can be a liquid crystal display, and the sound and light alarm can be a buzzer or a light emitting diode.

FIG. 2 is a schematic structural diagram of another ESD DC voltage detection system in a gas transmission station provided by an embodiment of the present invention. As shown in FIG. 2 , the DC voltage detection system may further include: a signal conversion module 05 .

The signal conversion module 05 is electrically connected to the DC voltage acquisition module 01 and the main control module 03 respectively.

The DC voltage acquisition module 01 is also used to send the collected DC voltage to the signal conversion module 05, and the signal conversion module 05 is used to convert the DC voltage into a digital signal and send it to the main control module 03.

Optionally, as shown in FIG. 3 , the DC voltage detection system may further include: a switch 06 .

The upper computer 04 and the main control module 03 may establish a communication connection through the switch 06, wherein the switch may be an industrial switch.

The host computer 04 can not only store the DC voltage sent by the main control module 03, but also send the preset voltage range to the main control module 03 through the switch 06, that is, the staff of the gas transmission station can According to the actual situation of the field, set the appropriate preset voltage range through the host computer 04. In addition, a real-time clock chip can also be embedded in the main control module 03, so the main control module can correspond each DC voltage collected by the DC voltage acquisition module to time one by one, and store the DC voltage in the database ( For example, in the memory of the main control module or in the memory of the upper computer), so that the staff can perform processing tasks such as historical data query and data analysis.

In practical applications, the rated working power supply of the solenoid valve in the ESD in the gas transmission station can be 24V DC power supply, and the design principle is fail-safe, so under normal circumstances, the solenoid valve is in the excited state, that is, the energized state, and the solenoid valve There is no control action for the main line valve; under the condition of failure or ESD system function start, the solenoid valve is in the non-excitation state, that is, the state of power failure, and the solenoid valve controls the closing of the main line valve, so the DC voltage operation of the solenoid valve will directly affect To the control effect of the gas transmission station valve. In the embodiment of the utility model, since the DC voltage detection system can collect the DC voltage of the solenoid valve in real time, and can display the module in the field of the gas transmission station and the upper computer in the station control room of the gas transmission station in real time. The DC voltage of the solenoid valve in the ESD effectively improves the detection efficiency of the DC voltage of the solenoid valve, and the staff can monitor the DC voltage through the host computer in the station control room without going to the gas transmission station. On-site inspections are carried out, thereby reducing the workload of the staff.

Fig. 4 is a circuit diagram of a DC voltage acquisition module and an on-site display module provided by an embodiment of the present invention. As shown in Fig. 4, the DC voltage acquisition module 01 includes at least two input terminals 11 and 12, and the two input terminals 11 and 12 can be respectively connected with the positive pole and the negative pole of the solenoid valve in the ESD, so as to collect the DC voltage when the solenoid valve is working. The DC voltage acquisition module 01 can also be connected to a power source through two input terminals 13 and 14 to provide electric energy for the DC voltage acquisition module 01 .

In practical applications, the DC voltage acquisition module 01 can acquire an analog signal of a DC voltage of 0 to 24 volts (V) through the two input terminals 11 and 12, and can convert the analog signal of the DC voltage into a voltage of 4 to 20 volts (V). The standard current value signal of milliampere (mA) is sent to the signal conversion module. Wherein, the specific working principle of collecting the DC voltage by the DC power acquisition module can refer to related technologies, and the embodiment of the utility model does not repeat it here.

Referring to FIG. 4 , the DC voltage acquisition module 01 may include an isolation amplifier circuit 1a and an analog-to-digital conversion circuit. The isolation amplifying circuit 1a is used to amplify the collected DC voltage; the analog-to-digital conversion circuit is used to convert the collected DC voltage into a digital signal and send it to the on-site display module 02 . Wherein, the analog-to-digital conversion circuit can be located in the output circuit 1b in FIG. 4 , or in the micro-control unit (English: Micro-controllerUnit; MCU for short) 1c of the DC voltage acquisition module 01 .

It can also be seen from FIG. 4 that the on-site display module 02 may include a liquid crystal display 2 a for displaying the DC voltage collected by the DC voltage collection module 01 . Further, as shown in FIG. 4 , the on-site display module 02 may also include a light-emitting diode 2b, which can prompt the staff that the DC voltage of the solenoid valve is abnormal by emitting light, that is, the on-site display module 02 may also have Alarm function. Specifically, the MCU in the DC power acquisition module 01 may store a preset voltage range (for example, the main control module may send the preset voltage range to the DC voltage acquisition module), and the DC power acquisition module 01 may pass the The MCU judges whether the collected DC voltage is within the preset voltage range. When the DC voltage is not within the preset voltage range, the MCU can control the light-emitting diode 2b to emit light, so as to remind the field staff that the solenoid valve is working abnormally. Effect.

Optionally, as shown in FIG. 3 , the DC voltage detection system may further include: a surge protector 07 and an isolator 08 .

The surge protector 07 can be an analog surge protector, and the analog surge protector 07 is respectively connected with the DC voltage acquisition module (not shown in FIG. 1 ) and the signal conversion module 05 (for example, by isolating The device 08 is connected to the signal conversion module 05), and is used to shunt the surge in the DC voltage detection system. The isolator 08 is respectively connected with the surge protector 07 and the signal conversion module 05 for isolating the input signal, output signal and power signal in the DC voltage detection system.

In addition, as shown in Figure 3, the DC voltage detection system also includes an uninterruptible power supply (English: Uninterruptable Power Supply; UPS for short) and an AC to DC module. The UPS can provide stable power for the components in the DC voltage detection system. , Uninterrupted power supply ensures the stability of the DC voltage detection system.

Optionally, as shown in FIG. 2 , the ESD includes at least two power supplies 10 , and the DC voltage detection system further includes: a switch 09 .

The switch 09 is electrically connected to the at least two power supplies 10 and the solenoid valve respectively, and the switch 09 is used to control the power-on state of each power supply and the solenoid valve in the ESD, and the power-on state includes power supply or power-off . For example, the power supply 1 can be used to supply power to the solenoid valve. When the power supply 1 is insufficient or fails, the power supply 2 can be switched to supply power to the solenoid valve, thereby ensuring the stability of the solenoid valve.

In the embodiment of the utility model, referring to Fig. 2, the DC voltage detection system can be set up in the original data acquisition and monitoring control (English: Supervisory Control And Data Acquisition; abbreviation: SCADA) system in the gas transmission station, that is, the The data link in the SCADA system can be directly used for data transmission between modules in the DC voltage detection system.

The utility model provides a DC voltage detection system for ESD in a gas transmission station, a DC voltage acquisition module, an on-site display module, a main control module and a host computer; the system can collect electromagnetic waves in the ESD through the DC voltage acquisition module. The DC voltage of the valve is displayed in real time through the on-site display module; when the DC voltage is not within the preset voltage range, an alarm signal can also be sent through the host computer. Therefore, the DC voltage detection system provided by the utility model can realize the real-time detection and display of the DC voltage of the electromagnetic valve in the ESD, and has the function of warning and prompting. The impact of the explosion-proof environment not only simplifies the detection steps, but also reduces potential safety hazards.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. a kind of DC voltage detection system of emergency stop control system ESD in the gas transmission station, it is characterized in that, described DC voltage detection system comprises: DC voltage acquisition module, on-site display module, main control module and host computer; The DC voltage collection module is electrically connected to the solenoid valve in the ESD, and is used to collect the DC voltage of the solenoid valve in the ESD, and sends the collected DC voltage to the on-site display module and the main control module; The on-site display module is used to display the DC voltage; The main control module is used to send the DC voltage to the host computer, and send an alarm command to the host computer when the DC voltage is not within a preset voltage range; The upper computer is used for displaying the DC voltage, and sending an alarm signal according to the alarm instruction. 2. The DC voltage detection system according to claim 1, wherein the DC voltage detection system further comprises: a signal conversion module; The signal conversion module is electrically connected to the DC voltage acquisition module and the main control module respectively; The DC voltage acquisition module is further configured to send the acquired DC voltage to the signal conversion module; The signal conversion module is configured to convert the DC voltage into a digital signal and send it to the main control module. 3. The DC voltage detection system according to claim 1, wherein the DC voltage detection system further comprises: a switch; The upper computer establishes a communication connection with the main control module through the switch; The host computer is further configured to send a preset voltage range to the main control module through the switch. 4. DC voltage detection system according to claim 1, is characterized in that, The DC voltage acquisition module includes two input terminals; The two input ends are respectively connected to the positive pole and the negative pole of the solenoid valve. 5. The DC voltage detection system according to claim 1, wherein the DC voltage acquisition module comprises: an isolation amplifier circuit and an analog-to-digital conversion circuit; The isolation amplifier circuit is used to amplify the collected DC voltage; The analog-to-digital conversion circuit is used to convert the collected DC voltage into a digital signal and send it to the on-site display module. 6. The DC voltage detection system according to claim 2, wherein the DC voltage detection system further comprises: a surge protector; The surge protector is respectively connected with the DC voltage acquisition module and the signal conversion module, and is used for shunting the surge in the DC voltage detection system. 7. The DC voltage detection system according to claim 6, wherein the DC voltage detection system further comprises: an isolator; The isolator is respectively connected with the surge protector and the signal conversion module, and is used for isolating the input signal, output signal and power signal in the DC voltage detection system. 8. The DC voltage detection system according to any one of claims 1 to 7, wherein the ESD includes at least two power supplies, and the DC voltage detection system further comprises: a switch; The switch is electrically connected to the at least two power supplies and the solenoid valve in the ESD respectively; The switching switch is used to control the power-on state of each power supply and the electromagnetic valve in the ESD, and the power-on state includes power supply or power-off. 9. The DC voltage detection system according to any one of claims 1 to 7, characterized in that, The on-site display module includes a liquid crystal display. 10. The DC voltage detection system according to any one of claims 1 to 7, characterized in that, The upper computer includes a display and an audible and visual alarm.