Detection device for single-channel electrolytic cell

Abstract

The utility model relates to a detection device for a single-channel electrolytic cell, which comprises an explosion-proof casing, a main control board arranged in the explosion-proof casing, a gas inlet interface arranged on two sides of the explosion-proof casing and used for connecting a hydrogen outlet pipe of the electrolytic cell, a gas outlet interface arranged on two sides of the explosion-proof casing and used for connecting a gas inlet pipe of a hydrogen storage tank, and a cable interface assembly arranged at the bottom of the explosion-proof casing, the liquid crystal screen is arranged on the front side of the explosion-proof machine shell, a gas flow sensor, a hydrogen concentration sensor and a temperature and humidity sensor are arranged in the upper portion of the explosion-proof machine shell, and a signal collecting and processing module, a processing module, a display module, a Hart communication module, an output module and a key module are integrated on the main control board. The detection device of the single-channel electrolytic cell can be assembled between the electrolytic cell and a hydrogen storage tank, and can be used for automatically sampling parameters such as flow, purity, temperature and humidity of output hydrogen, processing signals, displaying on site and sending digital-analog signals, so that remote centralized on-line monitoring and automatic control of alarm protection equipment are realized.

Description

Technical Field

[0001] The utility model relates to the field of detection technology and equipment, and particularly relates to a detection device for a single-channel electrolytic cell. Background Art

[0002] The proton exchange membrane single-channel electrolytic cell is the main equipment for hydrogen production by water electrolysis. Deionized water is filled in the water tank of the PEM electrolytic cell. Under the action of direct current, water molecules undergo an oxidation reaction at the anode, losing electrons to generate oxygen and hydrogen ions. Subsequently, electrons are transferred to the cathode through the external circuit. Under the action of the electric field, hydrogen ions are conducted through the proton exchange membrane to the cathode and undergo a reduction reaction at the cathode, obtaining electrons to generate hydrogen, thereby realizing the function of hydrogen production and energy storage. The electrolytic cell system needs to continuously detect parameters such as the flow rate, concentration, temperature, humidity, etc. of the produced hydrogen to ensure its production, purity, gas temperature, and water content, and further ensure the energy storage quality, as well as the safety and stability of the system operation. The existing flow meter combined with sampling detection method not only consumes manpower but also has low efficiency. There is a need for a detection device that can be matched in the electrolytic cell system and realize automatic sampling, signal processing, and transmission of the hydrogen production parameters. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a detection device for a single-channel electrolytic cell, which can be assembled between the electrolytic cell and the hydrogen storage tank, and can automatically sample, signal process, display on-site, and transmit two types of digital and analog signals for the output hydrogen in terms of parameters such as flow rate, purity, temperature, and humidity, so as to realize remote centralized online monitoring and automatic control of the alarm protection device.

[0004] The detection device of this single-channel electrolytic cell includes an explosion-proof housing, a main control board arranged inside the explosion-proof housing, an air inlet interface for connecting the hydrogen outlet pipe of the electrolytic cell and an air outlet interface for connecting the inlet pipe of the hydrogen storage tank arranged on both sides of the explosion-proof housing, a cable interface assembly arranged at the bottom of the explosion-proof housing, and a liquid crystal screen arranged on the front side of the explosion-proof housing; wherein, a gas flow sensor, a hydrogen concentration sensor and a temperature and humidity sensor are installed inside the upper part of the explosion-proof housing, and a signal acquisition and processing module for respectively connecting the gas flow sensor, the hydrogen concentration sensor and the temperature and humidity sensor and conditioning the output signals of each sensor is integrated on the main control board, a processing module for performing analog-to-digital conversion on the output signal of the signal acquisition and processing module, a display module for displaying the digital signal output by the processing module, a Hart communication module for remotely transmitting the digital signal output by the processing module, an output module for performing digital-to-analog conversion on the digital signal output by the display processing module and outputting a 4-20mA weak current signal, a key module for performing functional operations on the processing module, and a power supply module for supplying power to the signal acquisition and processing module, the processing module, the display module, the Hart communication module and the output module, and the key module draws power from the processing module; a partition is arranged inside the explosion-proof housing, and the signal connection lines between the gas flow sensor, the hydrogen concentration sensor and the temperature and humidity sensor and the signal acquisition and processing module are hermetically isolated through the partition and a sealing rubber sleeve; the outgoing line of the output module and the incoming line of the power supply module are led out through the cable interface assembly, and the cable interface assembly includes an L-shaped connector integrally formed below the explosion-proof housing and a tapered wire fixing cap screwed on the connector, and a plurality of side openings for providing an inward receiving space are opened in the threaded area protruding above the connector.

[0005] Further, the gas flow sensor, the hydrogen concentration sensor and the temperature and humidity sensor are respectively connected to the input end of the processing module through a signal acquisition and processing module, the output end of the processing module is respectively connected to the display module and the Hart communication module and outputs a digital signal, another output end of the processing module is connected to the output module to output a 4-20mA weak current signal, the key module is connected to the control input end of the processing module, and the power supply module steps down and converts the external power supply to DC3.3-5V and then supplies power to other modules except the key module.

[0006] Specifically, the processing module uses an STM32F303 microprocessor integrated with an AD conversion module.

[0007] Specifically, the signal acquisition and processing module uses an LDM-1000 signal acquisition module.

[0008] Specifically, the output module uses an XTR111 voltage signal to 4-20mA current signal module.

[0009] The detection device of a single-channel electrolytic cell of the present utility model can be assembled between the electrolytic cell and the hydrogen storage tank, and can automatically sample parameters such as flow rate, purity, temperature, and humidity of the output hydrogen, process signals, display on-site, and send two types of signals, digital and analog, for realizing remote centralized online monitoring and automatic control of alarm protection equipment. Brief Description of the Drawings

[0010] The following further describes the detection device of a single-channel electrolytic cell of the present utility model in conjunction with the drawings:

[0011] Figure 1 It is a schematic three-dimensional structure diagram of the detection device of the single-channel electrolytic cell;

[0012] Figure 2 is Figure 1 the internal structure schematic diagram of

[0013] Figure 3 is Figure 2 the partial enlarged view of part A in

[0014] Figure 4 It is the logic structure and connection principle block diagram of the wired temperature sensor.

[0015] In the figure:

[0016] 1 - explosion-proof housing; 101 - gas flow sensor, 102 - hydrogen concentration sensor, 103 - temperature and humidity sensor; 11 - intake joint, 12 - outlet joint, 13 - partition board, 14 - sealing rubber sleeve;

[0017] 2 - main control board; 21 - signal acquisition and processing module, 22 - processing module, 23 - display module, 24 - Hart communication module, 25 - output module, 26 - key module, 27 - power module;

[0018] 3 - cable interface component; 31 - connector, 32 - wire fixing cap, 33 - side opening;

[0019] 4 - liquid crystal display screen. Detailed Embodiment

[0020] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. are all based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0022] The following uses specific embodiments to further describe the technical solution of the present utility model, but the protection scope of the present utility model is not limited to the following embodiments.

[0023] Embodiment 1: As Figures 1 to 4As shown in the figure, the detection device of this single-channel electrolytic cell includes an explosion-proof housing 1, a main control board 2 arranged inside the explosion-proof housing 1, an air inlet interface 11 for connecting the hydrogen outlet pipe of the electrolytic cell and an air outlet interface 12 for connecting the inlet pipe of the hydrogen storage tank arranged on both sides of the explosion-proof housing 1, a cable interface component 3 arranged at the bottom of the explosion-proof housing 1, and a liquid crystal screen 4 arranged on the front side of the explosion-proof housing 1; among them, a gas flow sensor 101, a hydrogen concentration sensor 102 and a temperature and humidity sensor 103 are installed inside the upper part of the explosion-proof housing 1. A signal acquisition and processing module 21 for respectively connecting the gas flow sensor 101, the hydrogen concentration sensor 102 and the temperature and humidity sensor 103 and conditioning the output signals of each sensor is integrated on the main control board 2, a processing module 22 for performing analog-to-digital conversion on the output signal of the signal acquisition and processing module 21, a display module 23 for displaying the digital signal output by the processing module 22, a Hart communication module 24 for remotely transmitting the digital signal output by the processing module 22, an output module 25 for performing digital-to-analog conversion on the digital signal output by the display processing module 22 and outputting a 4-20 mA weak current signal, a key module 26 for performing functional operations on the processing module 22, and a power supply module 27 for supplying power to the signal acquisition and processing module 21, the processing module 22, the display module 23, the Hart communication module 24, and the output module 25. The key module 26 draws power from the processing module 22; a partition 13 is arranged inside the explosion-proof housing 1, and the signal connection lines between the gas flow sensor 101, the hydrogen concentration sensor 102 and the temperature and humidity sensor 103 and the signal acquisition and processing module 21 are hermetically isolated by arranging the partition 13 and the sealing rubber sleeve 14; the outgoing line of the output module 25 and the incoming line of the power supply module 27 are led out through the cable interface component 3. The cable interface component 3 includes an L-shaped connector 31 integrally formed below the explosion-proof housing 1 and a frustum-shaped wire fixing cap 32 screwed onto the connector 31. A plurality of side openings 33 for providing an inward receiving space are opened in the threaded area extending above the connector 31. After the wiring is led out, by screwing the wire fixing cap into the connector, the frustum-shaped wire fixing cap presses the edge of the connector to gradually retract the threaded part, clamping the wire to play a role in preventing retreat, thereby preventing the wire from being dragged away from the soldering connection of the main control board by an external force. The gas flow sensor 101, the hydrogen concentration sensor 102 and the temperature and humidity sensor 103 are respectively connected to the input end of the processing module 22 through a signal acquisition and processing module 21. The output end of the processing module 22 is respectively connected to the display module 23 and the Hart communication module 24 and outputs a digital signal. Another output end of the processing module 22 is connected to the output module 25 to output a 4-20 mA weak current signal. The key module 26 is connected to the control input end of the processing module 22. The power supply module 27 steps down and converts the external power supply to DC 3.3-5V and supplies power to other modules except the key module.

[0024] Embodiment 2: AsFigure 4 As shown in the figure, the processing module 22 of the detection device for this single-channel electrolytic cell uses an STM32F303 microprocessor integrated with an AD conversion module. In addition to the control functions for other functional modules and the control of display content based on the processor, the STM32F303 is integrated with several multi-channel ADC modules, which can directly perform analog-to-digital conversion on different input signals. The signal acquisition and processing module 21 uses an LDM-1000 signal acquisition module. The LDM-1000 acquisition module can amplify, filter, and condition the input signal in sequence to ensure signal anti-interference and stability. The output module 25 uses an XTR111 voltage signal to 4-20mA current signal module. The weak current analog signal is used to connect devices such as alarms and protection switches. The devices can directly alarm or perform electrolysis interruption protection according to the signal strength in the case of low hydrogen concentration, high temperature, and flow threshold when entering the tank. The remaining structures and components are as described in Embodiment 1 and will not be repeated.

[0025] During operation: Deionized water electrolyzes hydrogen, and the hydrogen from the hydrogen outlet pipe of the electrolytic cell enters the hydrogen storage tank through the air duct. The gas flow sensor, palladium alloy nano-film hydrogen purity sensor, and temperature and humidity sensor arranged in the air duct respectively collect hydrogen flow, hydrogen purity, gas temperature, and gas water content (humidity). After the signal is amplified, conditioned, and filtered to remove interference by the acquisition and processing module, it is input into the STM32F303 for analog-to-digital conversion processing, and then sent to the display module integrated on the liquid crystal screen for display through the liquid crystal screen, and sent to the Hart communication module for remote transmission of data to the upper computer for online centralized data and status monitoring. At the same time, after voltage regulation processing, it is sent to the output module for voltage and current conversion to output a 4-20mA weak current signal to be interconnected with devices such as alarms and switches to achieve automatic protection control.

[0026] The detection device for this single-channel electrolytic cell can be assembled between the electrolytic cell and the hydrogen storage tank, and can automatically sample, process signals, display on-site, and send two types of signals, digital and analog, for the output hydrogen in terms of parameters such as flow, purity, temperature, and humidity, so as to achieve remote centralized online monitoring and automatic control of alarm protection devices.

[0027] The above description shows the main features, basic principles, and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments or examples, and can be implemented in other specific forms without departing from the spirit or basic features of the present utility model. Therefore, the above embodiments or examples should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0028] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A detection device for a single-channel electrolytic cell, characterized in that: It includes an explosion-proof housing (1), a main control board (2) arranged inside the explosion-proof housing (1), an intake interface (11) for connecting the hydrogen outlet pipe of the electrolytic cell and arranged on both sides of the explosion-proof housing (1), and an outlet interface (12) for connecting the intake pipe of the hydrogen storage tank, a cable interface assembly (3) arranged at the bottom of the explosion-proof housing (1), and a liquid crystal display screen (4) arranged on the front side of the explosion-proof housing (1); among them, a gas flow sensor (101), a hydrogen concentration sensor (102) and a temperature and humidity sensor (103) are installed inside the upper part of the explosion-proof housing (1). A signal acquisition and processing module (21) for respectively connecting the gas flow sensor (101), the hydrogen concentration sensor (102) and the temperature and humidity sensor (103) and conditioning the output signals of each sensor is integrated on the main control board (2), a processing module (22) for performing analog-to-digital conversion on the output signal of the signal acquisition and processing module (21), a display module (23) for displaying the digital signal output by the processing module (22), a Hart communication module (24) for remotely transmitting the data of the digital signal output by the processing module (22), an output module (25) for performing digital-to-analog conversion on the digital signal output by the processing module (22) and outputting a 4-20 mA weak current signal, a key module (26) for performing functional operations on the processing module (22), and a power supply module (27) for supplying power to the signal acquisition and processing module (21), the processing module (22), the display module (23), the Hart communication module (24), and the output module (25). The key module (26) gets power from the processing module (22); a partition (13) is arranged inside the explosion-proof housing (1), and the signal connection lines between the gas flow sensor (101), the hydrogen concentration sensor (102) and the temperature and humidity sensor (103) and the signal acquisition and processing module (21) are hermetically isolated by arranging the partition (13) and a sealing rubber sleeve (14); the outgoing wire of the output module (25) and the incoming wire of the power supply module (27) are led out through the cable interface assembly (3). The cable interface assembly (3) includes an L-shaped joint (31) integrally formed below the explosion-proof housing (1) and a conical wire fixing cap (32) screwed onto the joint (31). A plurality of side openings (33) for providing an inward receiving space are formed in the threaded area extending above the joint (31).

2. The detection device for a single-channel electrolytic cell according to claim 1, characterized in that: The gas flow sensor (101), hydrogen concentration sensor (102) and temperature and humidity sensor (103) are respectively connected to the input end of the processing module (22) through a signal acquisition and processing module (21). The output end of the processing module (22) is respectively connected to a display module (23) and a Hart communication module (24) and outputs digital signals. Another output end of the processing module (22) is connected to an output module (25) to output a 4-20 mA weak current signal. The key module (26) is connected to the control input end of the processing module (22). The power supply module (27) steps down and converts the external power supply to DC 3.3-5V and supplies power to other modules except the key module.

3. The detection device for the single-channel electrolytic cell according to claim 2, characterized in that: The processing module (22) uses an STM32F303 microprocessor integrated with an AD conversion module.

4. The detection device for a single-channel electrolytic cell according to claim 3, characterized in that: The signal acquisition and processing module (21) uses an LDM-1000 signal acquisition module.

5. The detection device for a single-channel electrolytic cell according to claim 4, characterized in that: The output module (25) uses an XTR111 voltage signal to 4-20 mA current signal module.

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