CN217899529U - Hydrogenation station safety control device - Google Patents

Abstract

The utility model discloses a safety control device of a hydrogen refueling station, which aims to solve the technical problems that the hydrogen leakage potential safety hazard exists in the prior art and the hydrogen leakage potential safety hazard is not easy to be rapidly monitored; the utility model discloses the operation has safe PLC of safe logic control procedure, safe PLC electricity is connected with including the emergency cut-off valve, the emergency stop button, the hydrogen detector, combustible gas alarm controller, the flame detector, the safe digital quantity acquisition part and the solenoid valve that fire alarm controller constitutes, the safe digital quantity actuating mechanism that the circuit breaker constitutes, the circuit breaker of safe and reliable ground shunt excitation equipment main power supply has been realized, the power of interlock turn-off equipment, close the emergency cut-off valve simultaneously in order to cut off the hydrogen pipeline, the technological effect of the safe controllable state of retaining device.

Description

Hydrogenation station safety control device

Technical Field

The utility model relates to a fuel filling station management and control equipment technical field, concretely relates to hydrogenation station safety control device.

Background

With the pursuit of people for carbon peaking and carbon neutralization targets, hydrogen energy is regarded as clean energy with the most development potential in the 21 st century because of the advantages of cleanness, high efficiency, safety and sustainable development, the hydrogen energy and the fuel cell industry thereof are highly regarded by people in related fields, and a hydrogen station is rapidly developed as an important clean energy filling station.

The inventor knows that a gas station security system and intelligent gas station system (Chinese patent document CN 214752228U) disclose an intelligent security system only suitable for gas stations, and environmental data of gas stations detected by a sensor is sent to an STM32 single chip microcomputer to control an alarm and displayed on an OLED display screen.

However, in the process of implementing the technical solution in the embodiment of the present application, the inventor of the present application finds that the above technology has at least the following technical problems: the system has single function, and because of the limitation of the equipment performance, the powerful functions of video monitoring and the like cannot be realized, the fire hazard in the environment can be only alarmed, and only basic information such as temperature and humidity in the environment is displayed.

The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.

Disclosure of Invention

The inventor discovers through research that: in the process of hydrogen storage, transportation and sale, the hydrogen charging station has certain potential safety hazard of hydrogen leakage due to key equipment or pipelines of the related systems such as gas discharging, pressurization, hydrogen storage, hydrogenation, diffusion and the like, and the hydrogen is colorless and odorless, has strong dissipation property and wide explosion limit range, is not easy to be rapidly monitored and takes emergency loss-stopping measures in time.

In view of at least one of the above technical problems, the present disclosure provides a safety control device for a hydrogen refueling station, comprising a safety PLC running safety control software of the hydrogen refueling station, wherein the safety PLC is further electrically connected with a safety digital quantity acquisition part comprising an emergency cut-off valve, an emergency stop button, a combustible gas alarm controller and a fire alarm controller, and a safety digital quantity execution mechanism comprising an electromagnetic valve and a circuit breaker, a hydrogen detector is electrically connected with the combustible gas alarm controller, and a flame detector is electrically connected with the fire alarm controller.

According to one aspect of the disclosure, a safety control device for a hydrogen refueling station is provided, which comprises a safety PLC located in a control room and operated with a safety logic control program, and an operation panel electrically connected with the safety PLC, wherein the operation panel comprises a touch screen and an emergency stop button which are connected to the safety PLC through an Ethernet, the safety PLC is further electrically connected with a safety digital quantity input module and a safety digital quantity output module, the safety digital quantity input module is electrically connected with a plurality of emergency shut-off valves, a plurality of emergency stop buttons, a combustible gas alarm controller and a fire alarm controller, a plurality of hydrogen detectors are electrically connected with the combustible gas alarm controller, a plurality of flame detectors are electrically connected with the fire alarm controller, and the safety digital quantity output module is electrically connected with a plurality of electromagnetic valves and circuit breakers.

In some embodiments of the present disclosure, the safety control device of the hydrogen refueling station further includes an RS485 communication module electrically connected between the combustible gas alarm controller, the fire alarm controller and the safety PLC.

In some embodiments of the present disclosure, the emergency stop button employs dual normally closed switch volume contacts.

In some embodiments of the present disclosure, the high alarm signal of the combustible gas alarm controller is electrically connected to the safety digital value input module by using a double normally closed switch value contact.

In some embodiments of the present disclosure, the safety PLC includes a digital quantity input channel at its body; and the low alarm signal of the combustible gas alarm controller adopts a normally closed switching value contact and is electrically connected with a digital value input channel of the safety PLC body.

In some embodiments of the present disclosure, the fire signal of the fire alarm controller employs a dual normally closed switch contacts, which are electrically connected to the safety digital input module.

In some embodiments of the present disclosure, the slam shut valve includes an on and off dual position feedback electrically connected to the safety digital input module.

In some embodiments of the present disclosure, the plurality of emergency cut-off valves are respectively located at the gas discharging column and the hydrogen storage container, the plurality of explosion-proof emergency stop buttons are respectively located at the doorway of the business hall, the gas discharging area, the hydrogen storage area and the hydrogen addition area, the plurality of hydrogen detectors are respectively arranged at the gas discharging area, the compression area, the sequential control panel area, the hydrogen storage area and the hydrogen addition area, and the plurality of flame detectors are respectively arranged at the gas discharging area, the compression area, the sequential control panel area, the hydrogen storage area and the hydrogen addition area.

One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages:

1. the hydrogen detector, the flame detector and the emergency stop button are organically integrated, the technical problems that in the prior art, certain potential safety hazards of gas leakage exist, and monitoring is not easily and rapidly monitored are solved, so that the circuit breaker for safely and reliably separating the power supply of the equipment is realized, the power supply of the equipment is shut down in an interlocking manner, the emergency cut-off valve is closed to cut off a hydrogen pipeline, and the technical effect of the safe and controllable state of the equipment is kept.

2. The emergency stop button, the combustible gas alarm controller and the fire alarm controller are respectively connected to the safety digital value input module through double normally closed switch value contacts, and signal acquisition is safe and reliable.

Drawings

FIG. 1 is a control schematic diagram of a hydrogen refueling station safety control device according to an embodiment of the present application.

FIG. 2 is a schematic diagram of a safety control device of a hydrogen refueling station according to an embodiment of the present disclosure.

Fig. 3 is a flow chart of the control of the hydrogen station emergency shutdown logic in an embodiment of the present application.

FIG. 4 is a flow chart illustrating the logic control for the operation of the slam shut valve in an embodiment of the present application.

In each of the above figures, ZD, a switching power supply; DI. A digital quantity input module; DO and digital quantity output modules; CM, RS485 communication module; HMI, touch screen; STP1, emergency stop button; STP2-STP6 and an explosion-proof emergency stop button; XV1-XV5, emergency cut-off valve; AK1, combustible gas alarm controller; AK2, fire alarm controller; GT1-GTn, hydrogen detector; FD1-FDn, a flame detector; SV1-SV5, electromagnetic valve; QFO, circuit breaker.

Detailed Description

The programs referred to or relied on in the following embodiments are all conventional programs or simple programs in the art, and those skilled in the art can make routine selection or adaptation according to specific application scenarios.

The unit modules, components, sensors, and other devices referred to in the following examples are all conventional commercially available products unless otherwise specified.

The embodiment of the application provides a safety control device for a hydrogen refueling station, wherein the safety PLC for the hydrogen refueling station is a simple program, and can be obtained by conventional and adaptive adjustment based on a corresponding scene by technical personnel in the related field; the hydrogen gas safety digital quantity monitoring system comprises a safety PLC (programmable logic controller) running with a safety logic control program of a hydrogenation station, wherein the safety PLC is also electrically connected with a safety digital quantity acquisition part consisting of an emergency cut-off valve, an emergency stop button, a combustible gas alarm controller and a fire alarm controller, and a safety digital quantity execution mechanism consisting of an electromagnetic valve and a circuit breaker, a hydrogen detector is electrically connected with the combustible gas alarm controller, and a flame detector is electrically connected with the fire alarm controller. The device has effectively solved and has had certain gas leakage potential safety hazard among the prior art, and hydrogen is colorless tasteless, and the loss nature is strong, and explosion limit range is wide, is difficult for by the technical problem of quick monitoring.

For better understanding of the technical solutions of the present application, the technical solutions will be described in detail below with reference to the drawings and specific embodiments.

Example one

The embodiment discloses a safety control device of a hydrogen station, which comprises a safety PLC running with a safety logic control program and an operation panel electrically connected with the safety PLC, wherein the safety PLC comprises a digital quantity input channel, a safety digital quantity input module and a safety digital quantity output module which are positioned on a body of the safety PLC, and the operation panel comprises a touch screen HMI and an emergency stop button STP1; the touch screen HMI is connected to the PLC through the Ethernet, and information such as the leakage amount and position of hydrogen, fire alarm and position, and the position of the emergency stop button can be synchronously displayed on the touch screen HMI in real time.

The safety PLC is also electrically connected with an RS485 communication module CM, safety digital quantity input modules DI1 and DI2 and safety digital quantity output modules DO1, DO2 and DO3.

The safe digital quantity input module DI1 comprises an emergency stop button STP1, explosion-proof emergency stop buttons STP2-STP6, a combustible gas alarm controller AK1 and a fire alarm controller AK2, a hydrogen detector GT1-GTn is connected with the combustible gas alarm controller AK1, and a flame detector FD1-FDn is connected with the fire alarm controller AK2; the emergency stop button STP adopts double normally closed switching value contacts; the RS485 communication module is used for communication between the combustible gas alarm controller AK1 and the fire alarm controller AK2 and the safety PLC; the hydrogen leakage amount and the fire signal are uploaded to the safety PLC through an MODBUS RTU protocol; a fire signal of the fire alarm controller AK2 adopts a double normally closed switch value contact and is electrically connected with the safety digital value input module DI1; the high signal of reporting of combustible gas alarm controller AK1 adopts two normally closed on-off quantity contacts, and the electricity is connected to safe digital input module DI1, and the low signal of reporting of combustible gas alarm controller AK1 adopts normally closed on-off quantity contact, and the electricity is connected to the digital input channel of safe PLC body.

The safety digital quantity input module DI2 comprises emergency cutoff valves XV1-XV5; the safety digital quantity output module DO1 comprises explosion-proof electromagnetic valves SV1-SV4; the emergency cutoff valves XV1-XV5 include on and off double-valve-position feedback, electrically connected to the safety digital input module DI2.

The safety digital quantity output module DO2 comprises an explosion-proof electromagnetic valve SV5; the safety digital output module DO3 comprises a breaker QF0.

The safety PLC control box is of a common type and is placed in a control room of a safety area, and an explosion-proof box not lower than Exd II CT4 Gb can be adopted to realize that the control box is placed in a dangerous area of an equipment site; an emergency stop button STP1 and a touch screen HMI are arranged on a front panel of the control box; the system adopts a UPS power supply to supply power, so that stability and reliability are ensured, and the power supply voltage is AC220V; the switching power supply ZD converts AC220V into DC24V for DC24V equipment; the RS485 communication module CM realizes that the PLC and the serial port equipment communicate through an RS485 interface MODBUS RTU protocol, and acquires data of the serial port equipment; the explosion-proof emergency stop buttons STP2-STP6 are respectively positioned at the doorway of a business hall, the gas discharge area, the hydrogen storage area, the hydrogenation machine 1 area and the hydrogenation machine 2 area; the emergency cut-off valves XV1 to XV5 are respectively positioned on the gas discharging column 1, the gas discharging column 2, the high pressure hydrogen storage container, the medium pressure hydrogen storage container and the low pressure hydrogen storage container; the hydrogen detectors GT1-GTn are connected to the combustible gas alarm controller AK1, the hydrogen detectors GT1-GTn are arranged in the gas unloading area, the compression area, the sequential control panel area, the hydrogen storage area and the hydrogenation area, and the number of the hydrogen detectors is arranged according to the actual demand of the site; the flame detectors FD1-FDn are connected to the fire alarm controller AK2, the flame detectors FD1-FDn are arranged in the air discharge area, the compression area, the sequential control panel area, the hydrogen storage area and the hydrogenation area, and the number of the flame detectors is arranged according to the actual requirements of the site; the electromagnetic valves SV1-SV5 correspond to the emergency cut-off valves XV1-XV5 one by one to control the on-off of the equipment; the main circuit breaker QF0 is provided with a shunt release, and the shunt release is released and powered off when triggering emergency cut-off.

Referring to fig. 3, when the equipment has no hydrogen leakage and reports high, or has fire alarm or is suddenly stopped and pressed down, a main breaker QF0 of a main power supply of the equipment can be manually switched on to supply power to each equipment of a hydrogen station, then emergency cut-off valves XV1-XV5 are opened on a touch screen HMI to keep a hydrogen pipeline of an air discharging column and a hydrogen storage container smooth, so that the air discharging, sequential hydrogen storage and sequential gas taking of hydrogen of the hydrogen station are realized; when hydrogen leakage reports high or fire alarms or the emergency stop button STP is pressed, the system safely and reliably switches off the main power supply QF0 of the equipment, switches off the switching power supply ZD of the equipment, and simultaneously closes the emergency cut-off valve XV to cut off the hydrogen pipeline, so that the equipment is stopped in a safe and controllable state, and the safety interlocking parking function is realized; after the emergency cut-off function is triggered, the output locking of the emergency cut-off fault can be reset on the touch screen HMI after the high alarm of hydrogen leakage, fire alarm and emergency stop are eliminated, and then the main breaker QF0 of the main power supply of the equipment is manually switched on again and the emergency cut-off valve XV is operated.

Referring to fig. 4, when the emergency cutoff valve XV has no valve position abnormality, the emergency cutoff valves XV1 to XV5 at the gas discharging column and the hydrogen storage container can be operated independently on the touch screen HMI; when the valve position of the emergency cut-off valve XV is abnormal, the abnormal emergency cut-off valve XV is automatically closed; the abnormal quick emergency valve XV needs to be cleared first, then the output of the abnormal quick emergency valve XV with the reset valve position on the touch screen HMI is locked, and then the operation of the quick emergency valve XV is carried out on the touch screen.

The working process of the example is as follows:

(1) A hydrogen detector GT1-GTn detects the leakage amount of surrounding hydrogen in real time, the leakage value is uploaded to a combustible gas alarm controller AK1, and the AK1 uploads the leakage value of GT1-GTn to a safety PLC through an MODBUS RTU protocol; triggering an AK1 low alarm signal to warn when any detected leakage is greater than a set 0.4% VOL (10% LEL); any detected leakage amount is greater than 1 vol (25 LEL), triggers an overhead signal of AK1, and performs an emergency shut-off function.

(2) The flame detectors FD1-FDn detect the fire condition of the area in real time, fire signals are uploaded to a fire alarm controller AK2, and the AK2 uploads the fire signals of the FD1-FDn to a safety PLC through an MODBUS RTU protocol; when any FD1-FDn detects a fire, a fire alarm signal of the AK2 is triggered to execute an emergency cut-off function.

(3) When an operator or an operator on duty operates, inspects and attends to work, if the system deviates from the set operating conditions, such as overpressure and temperature of the system are over-limit, hydrogen leakage occurs, fire occurs and the like, the emergency stop button STP can be pressed down quickly nearby, and the emergency cut-off function is executed.

(4) After the emergency cut-off function is triggered, the system safely and reliably cuts off the power supply of each device by a breaker QF0 of the main power supply of the shunt excitation device, and simultaneously closes an emergency cut-off valve XV to cut off a hydrogen pipeline, so that the device is stopped in a safe and controllable state, and the safety interlocking parking function is realized.

(5) After faults such as high alarm of hydrogen leakage, fire hazard, reset emergency stop button and the like are eliminated, a breaker QF0 of a main power supply of the equipment is electrified and an emergency cut-off valve XV is operated.

(6) When the valve position of the quick action valve XV is abnormal, for example: and automatically closing the emergency cutoff valve XV with abnormal valve position when the opening limit is not detected or the closing limit is not detected, and operating the emergency cutoff valve XV to recover to normal after the fault is eliminated and confirmed.

Although preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present application and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (8)

1. The safety control device comprises a server positioned in a control room and an operation panel electrically connected with the server, wherein the operation panel comprises a touch screen and an emergency stop button which are connected to the server through Ethernet, the safety control device is characterized in that the server is also electrically connected with a safety digital quantity input module and a safety digital quantity output module, the safety digital quantity input module is electrically connected with a plurality of emergency stop valves, a plurality of emergency stop buttons, a combustible gas alarm controller and a fire alarm controller, a plurality of hydrogen detectors are electrically connected with the combustible gas alarm controller, a plurality of flame detectors are electrically connected with the fire alarm controller, and the safety digital quantity output module is electrically connected with a plurality of electromagnetic valves and circuit breakers.

2. The hydrogen refueling station safety control device as claimed in claim 1, further comprising an RS485 communication module electrically connected between the combustible gas alarm controller, the fire alarm controller and the server.

3. The hydrogen station safety control device according to claim 1, wherein the emergency stop button employs dual normally closed on-off contacts.

4. The hydrogen station safety control device according to claim 1, wherein the high alarm signal of the combustible gas alarm controller is electrically connected to the digital quantity input module by using double normally closed switch value contacts.

5. The hydroprocessing station security control apparatus of claim 1, wherein the server includes a digital input channel at its body; and the low alarm signal of the combustible gas alarm controller adopts a normally closed switching value contact and is electrically connected with a digital value input channel of the server body.

6. The hydrogen refueling station safety control device as claimed in claim 1, wherein the fire alarm controller adopts double normally closed switch contacts to electrically connect the safety digital input module with the fire signal.

7. The hydroprocessing station safety control apparatus of claim 1, wherein the emergency shutdown valve includes an on and off dual-position feedback electrically connected to the safety digital quantity input module.

8. The hydrogen station safety control device according to claim 1, wherein the plurality of emergency cut-off valves are respectively provided at positions where the corresponding gas discharge columns and hydrogen storage containers are located; the plurality of explosion-proof emergency stop buttons are respectively positioned at the doorway of a business hall, the gas unloading area, the hydrogen storage area and the hydrogenation area and are used for emergently cutting off the communication between a main power supply of equipment and a corresponding pipeline and a hydrogen source; the hydrogen detectors are respectively arranged at the corresponding gas unloading area, the compression area, the sequential control panel area, the hydrogen storage area and the hydrogenation area; the flame detectors are respectively arranged at the corresponding gas unloading area, the compression area, the sequential control area, the hydrogen storage area and the hydrogenation area.

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