Distance measurement monitoring system for water electrolysis hydrogen production device

Abstract

The invention discloses a distance measurement monitoring system for a water electrolysis hydrogen production device, which comprises a detection signal transmitting module or a detection signal receiving module arranged on a preset monitoring point position, and further comprises a time measurement module and a data processing module, when the detection signal transmitting module transmits a detection signal and the detection signal receiving module receives the detection signal, a trigger signal is generated to the time measuring module, and the data processing module calculates the distance l of a monitored part according to the time interval t and the propagation speed v of the detection signal; the distance between two preset monitoring point positions is detected in a non-contact mode such as ultrasonic waves, laser and radar, the online monitoring and interlocking functions are achieved, automatic control over equipment is facilitated, when the large size change reflects that the compensation capacity of the disc spring is insufficient, the leakage situation possibly occurring in the electrolytic bath can be early warned, and the service life of the electrolytic bath is prolonged. The ultrasonic ranging fixed-point detection system used by the device can measure without contact, and is high in precision, quick in response and strong in anti-interference capability.

Description

Technical Field

[0001] The invention relates to the technical field of water electrolysis hydrogen production equipment, and in particular to a distance measurement monitoring system for a water electrolysis hydrogen production device. Background Art

[0002] The water electrolysis hydrogen production device is a device that decomposes water into hydrogen and oxygen, and its core component is the electrolyzer. In the electrolyzer, water molecules are decomposed into hydrogen and oxygen under the action of electrical energy. Filter-press water electrolyzer is a special water electrolysis device that uses filter-press technology to achieve an efficient water electrolysis process. This design can effectively improve the separation efficiency of hydrogen and oxygen, reduce the risk of gas mixing, and help improve the energy efficiency of the overall system. Its structure includes a number of electrolyzer chambers stacked and arranged in sequence. The electrolyzer chamber is the core unit in the filter-press water electrolyzer, and each chamber is an independent electrolysis reaction space responsible for decomposing water molecules into hydrogen and oxygen. Its structural components include anode plates, cathode plates, diaphragms, electrolytes, and gas collection channels; the anode plates are usually made of corrosion-resistant materials such as titanium, nickel, or titanium mesh coated with a catalyst, which serves as the positive electrode, where an oxidation reaction occurs, and water molecules lose electrons to generate oxygen. The cathode plate is also made of corrosion-resistant materials, such as titanium, nickel or titanium mesh coated with a catalyst; it serves as the negative electrode, where a reduction reaction occurs, and water molecules gain electrons to generate hydrogen. Commonly used diaphragms include ion exchange membranes, porous ceramics or microporous plastic membranes; the diaphragm is located between the anode plate and the cathode plate, allowing ions in the water to pass through, but preventing hydrogen and oxygen from mixing to ensure gas separation. Electrolytes, common electrolytes include alkaline solutions (such as KOH or NaOH) and acidic solutions (such as sulfuric acid); they provide the ions required for electrolysis, reduce resistance, and improve electrolysis efficiency. The gas collection channel is a special gas collection channel provided on the anode plate and the cathode plate to guide the generated hydrogen and oxygen to discharge; it ensures that the gas can be discharged smoothly, prevents gas accumulation in the small chamber, and improves safety.

[0003] As shown in a filter press alkaline water electrolyzer disclosed in application number: CN202321594795.4, it includes a left-end pressure plate and a right-end pressure plate, an intermediate pole plate is arranged between the left-end pressure plate and the right-end pressure plate, a left-end pole frame and a plurality of left pole frames are arranged between the left side of the intermediate pole plate and the left-end pressure plate, a sealing gasket and a diaphragm are arranged between two adjacent left pole frames, a plurality of right pole frames and a right-end pole frame are arranged between the right side of the intermediate pole plate and the right-end pressure plate, a sealing gasket and a diaphragm are arranged between two adjacent right pole frames, the left-end pressure plate, the intermediate pole plate and the right-end pressure plate are tightened by a plurality of long bolts to form the electrolyzer body, one end of the long bolt is provided with a disc spring assembly, and the other end is provided with a constant pressure hydraulic compensation system.

[0004] In summary, the filter press water electrolyzer is prone to the following problems during operation: During the operation of the filter press water electrolyzer, the number of superimposed electrolysis chambers is large, which makes the electrolyzer longer. The electrolysis reaction releases heat, which causes the internal temperature of the electrolyzer to rise. The temperature change will not only affect the electrolysis efficiency and gas production, but also cause changes in the structure of the electrolyzer, especially the length expansion and contraction in the axial direction.

[0005] Temperature changes have an impact on the material of the electrolytic cell equipment, the thermal expansion coefficient of the material, and the thermal expansion coefficient of different materials is different. Common electrolytic cell materials such as titanium, stainless steel and ceramics have their own thermal expansion coefficients. Specifically, the linear expansion coefficient of titanium is about 8.6×10^-6 / °C, while the linear expansion coefficient of stainless steel is about 17×10^-6 / °C. When the temperature of the electrolytic cell rises, the material will stretch in the axial direction; when the temperature drops, the material will shrink. Axial expansion and contraction have a great impact on the sealing performance, electrode spacing and diaphragm performance of the electrolytic cell. Axial expansion and contraction may cause stress changes in the electrolytic cell seals (such as gaskets and sealing rings), affecting the sealing effect. If the seal cannot adapt to the expansion and contraction caused by temperature changes, it may cause electrolyte leakage or gas escape, affecting the safety and reliability of the system. Axial expansion and contraction will affect the distance between the anode plate and the cathode plate, that is, the electrode spacing. Changes in the electrode spacing will affect the resistance of the electrolytic cell, and thus affect the electrolysis efficiency and energy consumption. If the electrode spacing becomes larger, the resistance increases and the electrolysis efficiency decreases; vice versa. The expansion and contraction of the diaphragm in the axial direction may affect its physical and chemical properties. If the diaphragm material cannot adapt to the expansion and contraction caused by temperature changes, it may cause the diaphragm to rupture or deform, affecting the separation effect of hydrogen and oxygen. At the same time, under normal working conditions, the disc spring on the electrolytic cell fastener may be severely deformed due to long-term use, excessive load, etc., resulting in a larger spacing between the electrolytic cells and leakage.

[0006] Therefore, it is particularly important to measure the distance between key components of a water electrolyzer when it is working. Currently, most electrolyzer distance measurement methods use manual tape measures. On the one hand, the measurement accuracy is insufficient, and on the other hand, manual distance measurement may touch the electrolyzer, causing safety problems.

[0007] In view of the above, it is necessary to propose a distance measurement monitoring system for a water electrolysis hydrogen production device to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to overcome the defects in the prior art and provide a distance measurement monitoring system for a water electrolysis hydrogen production device.

[0009] To achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a distance measurement monitoring system for a water electrolysis hydrogen production device, comprising a left-end pressure plate and a right-end pressure plate, a plurality of electrolysis chambers are arranged between the left-end pressure plate and the right-end pressure plate, the left-end pressure plate, the middle plate and the right-end pressure plate are tightened and overlapped with the plurality of electrolysis chambers by a plurality of long bolts to form an electrolytic cell body, a disc spring assembly is arranged at one end of the long bolt, preset monitoring points are arranged in pairs at the monitoring part of the electrolytic cell body, and also includes a detection signal transmitting module or a detection signal receiving module arranged at the preset monitoring point, the detection signal transmitting module is used to send a detection signal for non-contact measurement, and the detection signal receiving module is used to receive the detection signal; also includes a time measurement module and a data processing module; the detection signal transmitting module sends a detection signal and detects The signal receiving module generates a trigger signal to the time measurement module when receiving the detection signal. The time measurement module calculates the time interval t between two trigger signals as the flight time of the detection signal. The data processing module calculates the spacing l of the monitoring parts according to the time interval t and the detection signal propagation speed v; it also includes a temperature detection unit for monitoring the temperature of the electrolytic cell body, and measures the temperature T of the electrolytic cell body while performing distance detection; it also includes a comparison processing system, and the comparison processing system is preset with a database of theoretical spacings L of corresponding monitoring points of the electrolytic cell at different body temperatures; the comparison processing system receives the electrolytic cell body temperature T and the calculated spacing l, and compares them with the range of the theoretical spacing L of the corresponding temperature in the database, and triggers the alarm system when the spacing l exceeds the range of the theoretical spacing L.

[0010] Furthermore, the detection signal transmitting module is an ultrasonic ranging sensor, a laser ranging sensor or a radar ranging sensor.

[0011] Furthermore, the comparison processing system is connected to the PLC control system of the electrolytic hydrogen production device, so that the PLC control system of the electrolytic hydrogen production device triggers the corresponding interlock according to the comparison processing result; or the PLC control system of the electrolytic hydrogen production device issues a detection command to trigger the distance measurement monitoring system to perform regular detection.

[0012] Furthermore, the detection signal transmitting module and the detection signal receiving module are located at the same preset monitoring point, and a reflective component is provided at another preset monitoring point corresponding to the preset monitoring point.

[0013] Furthermore, the detection signal transmitting module and the detection signal receiving module are respectively arranged at two preset monitoring points of the monitoring part.

[0014] Furthermore, a positioning frame structure for setting up a detection signal transmitting module or a detection signal receiving module is provided at the preset monitoring point.

[0015] An application of a distance measurement monitoring system for a water electrolysis hydrogen production device, wherein a positioning frame structure is arranged on a left end pressure plate and a right end pressure plate, and a distance measurement monitoring system is used to monitor the distance change between the two end pressure plates.

[0016] An application of a distance measurement monitoring system for a water electrolysis hydrogen production device, wherein a positioning frame structure is arranged on any end pressure plate, another positioning frame structure is arranged on the pole frame of a certain electrolysis chamber, and a distance measurement monitoring system is used to monitor the distance change between the end pressure plate and the predetermined electrolysis chamber.

[0017] An application of a distance measurement monitoring system for a water electrolysis hydrogen production device, wherein positioning frame structures are respectively arranged on insulating pads on both sides of a disc spring assembly at the end of a long bolt, and a distance measurement monitoring system is used to monitor the size change of the disc spring assembly.

[0018] The advantages and beneficial effects of the present invention are as follows: the present invention provides a measuring device which can autonomously or automatically monitor the electrolytic cell body (internal spacing of the end pressure plates) and / or the size change of the electrolytic cell disc spring during the operation of the electrolytic cell online. The present invention detects the distance between two preset monitoring points by non-contact methods such as ultrasound, laser, radar, etc., and has online monitoring and interlocking functions, which is beneficial to automatic control of the equipment. When the size change is large and the disc spring compensation capacity is insufficient, it can provide early warning of possible leakage of the electrolytic cell. The ultrasonic ranging fixed-point detection system used in the device can measure without contact, has high precision, fast response, and strong anti-interference ability, and is directly connected to the PLC control system of the electrolytic hydrogen production device to carry out a chain reaction to protect the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the overall principle schematic diagrams of a distance measurement monitoring system for a water electrolysis hydrogen production device of the present invention; Figure 2 This is the second overall principle schematic diagram of a distance measurement monitoring system for a water electrolysis hydrogen production device according to the present invention; Figure 3 It is a schematic diagram of the installation structure of a distance measurement monitoring system for a water electrolysis hydrogen production device according to the present invention; Figure 4 is a schematic diagram of the installation of the positioning frame structure in the fifth embodiment of the present invention; Figure 5 The present invention Figure 4 Structural diagram of the AA section; Figure 6 is a schematic diagram of the installation of the positioning frame structure in the sixth embodiment of the present invention; Figure 7 The present invention Figure 6 Structural diagram of the AA section; Figure 8 is a schematic diagram of the installation of the positioning frame structure in the seventh embodiment of the present invention; Fig. 9 The present invention Figure 7 Structural diagram of the AA section; In the figure: 1. electrolytic cell body; 2. left end pressure plate; 3. right end pressure plate; 4. long bolt; 5. disc spring assembly; 6. preset monitoring point; 7. detection signal transmitting module; 8. detection signal receiving module; 9. ranging monitoring system; 10. reflection component; 11. positioning frame structure; 12. slot; 13. first side plate; 14. second side plate; 15. bottom plate; 16. U-shaped bayonet; 17. fastening bolt; 18. reinforcing rib; 19. guide rail; 20. slider; 21. vertical plate; 22. nut; 23. adjusting screw; 24. arc base plate; 25. first articulated arm; 26. second articulated arm; 27. positioning screw; 28. threaded hole; 29. ​​sensor; 30. insulating pad; 31. collar; 32. pole frame. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0021] Embodiment 1: A distance measurement monitoring system for a water electrolysis hydrogen production device includes a left-end pressure plate 2 and a right-end pressure plate 3, wherein a plurality of electrolysis chambers are arranged between the left-end pressure plate 2 and the right-end pressure plate 3, and the left-end pressure plate 2, the middle plate and the right-end pressure plate 3 are tightened and overlapped by a plurality of long bolts 4 to form an electrolytic cell body 1, wherein a disc spring assembly 5 is arranged at one end of the long bolt 4, and preset monitoring points 6 are arranged in pairs at the monitoring part of the electrolytic cell body 1, and a detection signal transmitting module 7 or a detection signal receiving module 8 is arranged at the preset monitoring point 6, and the detection signal transmitting module 7 is used to send a detection signal for non-contact measurement. In this embodiment, the detection signal transmitting module 7 and the detection signal receiving module 8 are placed at the same end, and the detection target is located at another preset monitoring point 6 opposite to the detection signal transmitting module 7. Figure 3 As shown, the detection signal transmitting module 7 and the detection signal receiving module 8 are located at the same preset monitoring point 6, and another preset monitoring point 6 corresponding to the preset monitoring point 6 is provided with a reflective component 10. The detection signal transmitting module 7 is an ultrasonic ranging sensor 29, and this embodiment is based on a pulse echo method, such as Figure 1As shown, the trigger signal of the control circuit causes the detection signal transmitting module 7 to generate an ultrasonic pulse under the stimulation. At this moment, the system also generates a start signal to be transmitted to the time measurement module. The ultrasonic wave is transmitted to the object and generates a pulse callback when it is blocked by the object. The detection signal receiving module 8 is used to receive the detection signal; the detection signal receiving module 8 receives the signal and sends an end signal to the time measurement module at the same time as receiving the signal, that is, the detection signal transmitting module 7 generates a trigger signal to the time measurement module when the detection signal is sent and the detection signal receiving module 8 receives the detection signal; the time measurement module digitizes the two signals to calculate the time difference, and the time measurement module calculates the time interval t between the two trigger signals as the flight time of the detection signal, thereby matching the flight time of the ultrasonic wave, combined with the sound propagation speed v (the sound propagation speed in the air can be calculated, assuming that the temperature in the air is constant at 15°C and the sound speed is about 340m / s), so that the distance between the signal transmitting end and the target is the distance l between the two preset monitoring points 6, and the data processing module calculates the spacing l of the monitoring parts according to the time interval t and the detection signal propagation speed v, as shown in the following formula:

[0022] .

[0023] It also includes a temperature detection unit that monitors the temperature of the electrolytic cell body 1, and measures the temperature T of the electrolytic cell body 1 while performing distance detection; the temperature detection unit measures the temperature of the environment in which the electrolytic cell body 1 is located, and can use this as a basis to calculate the speed of the sound wave in the environment, and can also be used to monitor the temperature of the electrolytic cell body 1 for the subsequent comparison processing of the corresponding temperature and the change relationship between the elongation of the electrolytic cell.

[0024] Specifically, temperature has a certain influence on the accuracy of ultrasonic ranging. Generally, for every 1°C change in temperature, the speed of sound changes by 0.607m / s. The change in the temperature effect on the ultrasonic wave is compensated to the ultrasonic wave speed as a correction to reduce the influence of temperature conditions on the ranging results and improve the accuracy of this ultrasonic detection system. This ultrasonic ranging system includes a temperature compensation part. By obtaining the medium temperature, the ultrasonic propagation speed is corrected to improve the ranging accuracy. The propagation speed of ultrasonic waves in actual working conditions is calculated by the following formula:

[0025] ; In the formula: t is the temperature of the air medium, the unit is ℃; T0 is a constant, and T0=273.16, the unit of v is m / s.

[0026] In this embodiment, the temperature data in the actual working condition is collected by the temperature detection unit, and the sound velocity is corrected, thereby improving the accuracy of the distance measurement. In this embodiment, the ultrasonic distance measurement monitoring system 9 has a measurement range of 20mm to 10m; the distance measurement accuracy error is ±0.025mm.

[0027] Furthermore, it also includes a contrast processing system, such as Figure 1 As shown, the comparison processing system is preset with a database of theoretical spacing L of corresponding monitoring points of the electrolytic cell at different temperatures of the main body; in actual operation, since the working temperature of the electrolytic cell main body 1 changes within a certain range, the elongation of the electrolytic cell main body 1 also changes corresponding to the temperature change. For example, the long bolt 4 connected between the two side end pressure plates has the fastening bolts 17 at both ends driven to a suitable torque when the equipment leaves the factory, so that the distance between the end pressure plates on both sides is the calibrated length of the original factory state; and the electrolytic cell main body 1 is affected by changes in working conditions and environmental changes during operation, and thermal expansion and contraction cause the spacing of the two side end pressure plates to change with the change of temperature. Based on long-term practical operation experience, the temperature change during the operation of the electrolytic cell main body 1 is edited as a temperature gradient as a reference. When a certain temperature value in the temperature gradient corresponds to, the spacing of the end pressure plates should be within a certain range. The comparison processing system receives the temperature T of the electrolytic cell main body 1 and the calculated spacing l, and compares them with the range of the theoretical spacing L of the corresponding temperature in the database. When the spacing l exceeds the range of the theoretical spacing L, the alarm system is triggered. During actual processing, the aforementioned temperature detection unit also detects and evaluates the temperature of the electrolytic cell body 1, and transmits the verified temperature data to the comparison processing system to select the corresponding temperature value from the temperature gradient, and then the distance range value of the end pressure plate under the temperature gradient can be found; and the actual spacing l measured by the ultrasonic ranging system is also transmitted to the comparison processing system by the data processing module, and the theoretical spacing L is compared with the actual spacing l. If the actual spacing is within the range of the theoretical spacing, the spacing change of the end pressure plate is normal; if it exceeds the range of the theoretical spacing, there may be a risk of leakage, and an alarm signal can be sent to the operator through the connected alarm system.

[0028] As a preferred embodiment, the comparison processing system is connected to the PLC control system of the electrolytic hydrogen production device. The distance value of the two preset monitoring points 6 measured by the aforementioned ultrasonic ranging monitoring system 9 can be transmitted to the display panel of the PLC control system for observation by the system operator, and the measured distance value and the comparison result can also be used as the conditions for the PLC to trigger the interlock, so that the PLC control system of the electrolytic hydrogen production device triggers the corresponding interlock according to the comparison processing result. The specific interlock operations include but are not limited to reducing the power of the electrolytic cell, increasing or decreasing the supply flow of the electrolyte, emergency parking and other operations.

[0029] In practice, the distance measurement between two preset monitoring points 6 of the monitoring area by the distance measurement monitoring system 9 can be automatically measured at regular intervals, or the distance measurement monitoring system 9 can be triggered by a detection command issued by the PLC control system of the electrolytic hydrogen production device.

[0030] Embodiment 2: The principle is the same as that of the first embodiment. In this embodiment, the detection signal transmitting module and the detection signal receiving module in the ranging monitoring system are respectively located at two preset monitoring points, so that the detection signal transmitting module and the detection signal receiving module are arranged relative to each other. Figure 4 As shown, the detection signal transmitting module and the detection signal receiving module are respectively arranged at two preset monitoring points of the monitoring part. Then, at this time, the distance between the two preset monitoring points is l=v×t.

[0031] Embodiment three: It is understandable that in actual use, laser ranging sensors can also be used instead of ultrasonic waves, using optical signals as detection signals for non-contact measurement; specifically, d is the distance to be measured between two preset monitoring points, c is the speed of light, and its propagation speed in the atmosphere is about 3×108m / s, and t is the flight time of the laser pulse from emission to reception, that is, the time interval between the start signal and the stop signal. In the pulsed laser ranging system, the time interval t is recorded by the clock counter inside the time measurement module to record the number of cycles of the clock oscillator between the start signal and the stop signal. The frequency of the oscillator determines the time resolution of the counter. Assuming the clock oscillator frequency is f, and the clock counter records N oscillation cycles, the distance d can be calculated according to the following formula:

[0032] ; Embodiment 4: It is understandable that in actual use, radar ranging sensors can also be used instead of ultrasonic waves, using electromagnetic wave signals as detection signals for non-contact measurement; the propagation speed of electromagnetic waves is about the speed of light, that is, about 300,000 kilometers per second. The radar ranging sensor system can calculate the distance of the target by measuring the time difference between the transmitted signal and the received echo signal. According to the time difference and the speed of the electromagnetic wave, the formula can be used:

[0033] D = (c × t) / 2 Calculate the distance to the target. Where D is the distance, c is the propagation speed of the electromagnetic wave (approximately 3×10^8 m / s), and t is the time difference from transmission to reception. Divide by 2 because the electromagnetic wave goes back and forth once.

[0034] Embodiment five: As an application embodiment of the distance measurement monitoring system, the preset monitoring point 6 is provided with a positioning frame structure 11 for setting up the detection signal transmitting module 7 or the detection signal receiving module 8. Specifically, in this embodiment, it is used to monitor the spacing between the end pressure plates on both sides of the electrolytic cell body, such as Figure 4 As shown, a positioning frame structure 11 is set on the left end pressure plate 2 and the right end pressure plate 3, and the monitoring part is the distance between the two end pressure plates. The two side end pressure plates are preset monitoring points 6, and a distance measurement monitoring system 9 is used to monitor the distance change between the two end pressure plates.

[0035] The positioning frame structure 11 includes a slot 12 with a groove fixed on the end pressure plate and matching the shape of the end pressure plate. The groove matches the shape of the edge of the end pressure plate. When used specifically, if the electrolytic cell body is a circular flange-shaped pressure plate, the slot 12 is also an arc-shaped structure, such as Figure 5 As shown, a first side plate 13 is provided on one side of the slot 12, and a second side plate 14 is provided on the other side opposite thereto. A bottom plate 15 is provided between the two side plates to fit the edge of the end pressure plate. The bottom plate 15 and the two side plates form a groove-shaped slot 12. Specifically, the first side plate 13 is provided with a U-shaped bayonet 16 that matches the position of the flange hole on the end pressure plate. When the slot 12 is clamped on the end pressure plate, the U-shaped bayonet 16 is clamped on at least two long bolts 4, and the number of U-shaped bayonet 16 is not less than two, so that the first side plate 13 uses the position of the two long bolts 4 to position the slot 12; and a fastening bolt 17 is screwed on the second side plate 14 on the other side. It can be understood that the spacing between the first side plate 13 and the second side plate 14 is greater than the thickness of the end pressure plate. When the slot 12 is buckled, the fastening bolt 17 is tightened to form a clamping and fixing state of the end pressure plate; so that the positioning frame structure 11 can be conveniently installed on the end pressure plate of the electrolytic cell body.

[0036] As a preferred embodiment, Figure 4 As shown, the side panels on both sides of the bottom plate 15 extend to form extended side edges, so that the bottom plate 15 plus the extended side edges on both sides form a widened slot 12, and triangular reinforcing ribs 18 are arranged between the extended side edges and the two side panels to avoid deformation during clamping; at the same time, the extended side edges are also beneficial to the position adjustment of the detection signal transmitting module 7 installed on the upper side.

[0037] Specifically, a guide rail 19 is provided on the upper side of the widened slot 12 and is arranged along the axial direction of the electrolytic cell body. A slider 20 is slidably arranged on the guide rail 19. The transmitting and receiving modules of the ranging detection system are installed on the slider 20. Specifically, a vertical plate 21 is vertically arranged on the slider 20. A through hole is arranged on the vertical plate 21. A sensor 29 of the ranging monitoring system 9 is installed through the through hole. Nuts 22 threadedly connected to the sensor 29 are arranged on both sides of the through hole for fixation; an adjusting screw 23 is also provided. The adjusting screw 23 is arranged parallel to the guide rail 19 and is rotatably connected to the slot 12. The adjusting screw 23 passes through the slider 20 and is threadedly connected. Therefore, the position of the sensor 29 can be accurately adjusted by rotating the adjusting screw 23, so that the transmitting window of the sensor 29 is flush with the end face of the end pressure plate, thereby minimizing the measurement error.

[0038] Embodiment six: An application of a distance measurement monitoring system 9 for a water electrolysis hydrogen production device, wherein a positioning frame structure 11 is arranged on any end pressure plate, such as Figure 6 As shown, another positioning frame structure 11 is arranged on the pole frame 32 of a certain electrolysis chamber, and a distance measurement monitoring system 9 is used to monitor the distance change between the end pressure plate and the predetermined electrolysis chamber.

[0039] In this embodiment, if Figure 6 As shown in the figure, the left end pressure plate is a preset monitoring point 6, and a certain pole frame 32 on the right is another preset monitoring point 6, so a positioning frame structure 11 is respectively set at these two points. The positioning frame structure 11 on the left point is the same as the structure of the fifth embodiment, and the positioning frame structure 11 on the right side includes an arc-shaped base plate 24, a first hinge arm 25, and a second hinge arm 26. Figure 7 As shown, the arc-shaped substrate 24 is arranged in contact with the surface of the pole frame 32, and its bottom surface has the same curvature as the surface of the pole frame 32. A threaded hole 28 is provided on the surface of the pole frame 32, and a positioning screw 27 is provided through the arc-shaped substrate 24. The positioning screw 27 is screwed on the threaded hole 28 to fix the positioning frame structure 11 to the pole frame 32. It can be understood that the threaded hole 28 for installation can be preset on the pole frame 32 of each small chamber, so as to facilitate the installation of the sensor 29.

[0040] An articulated seat is provided on the surface of the arc-shaped base plate 24, the lower end of the first articulated arm 25 is hinged on the articulated seat, and the upper end is hinged to the second articulated arm 26, and a vertical plate 21 is provided at the other end of the second articulated arm 26, and a sensor 29 is provided on the vertical plate 21; in this way, through the setting of the two articulated arms, the position of the sensor 29 in the up and down and left and right directions can be conveniently adjusted so that it can be set opposite to the sensor 29 on the other side.

[0041] Embodiment seven: An application of a distance measurement monitoring system 9 for a water electrolysis hydrogen production device, wherein a positioning frame structure 11 is respectively provided on the insulating pads 30 on both sides of the disc spring assembly 5 at the end of the long bolt 4, and the distance measurement monitoring system 9 is used to monitor the size change of the disc spring assembly 5. In this embodiment, the distance measurement monitoring system 9 is provided on the disc spring assembly 5, which can facilitate monitoring of the extrusion or rebound of the disc spring, and then the expansion and contraction deformation margin of the electrolyzer body can be judged accordingly.

[0042] In addition to the stacked disc springs in the disc spring assembly 5, annular insulating pads 30 are provided at both ends of the disc springs. By arranging sensors 29 on the two insulating pads 30, it is convenient to monitor the change amount of the disc spring assembly 5. Specifically, Figure 8 , 9 As shown, in this embodiment, the positioning frame is a ring 31, the inner diameter of the ring 31 is larger than the insulating pad 30, a vertical plate 21 is provided on the outer wall of the ring 31, and a sensor 29 is provided on the vertical plate 21; and a plurality of positioning screws 27 are threadedly provided through the ring 31, and the positioning screws 27 are distributed circumferentially. During installation, the ring 31 is put on the corresponding insulating pad 30, and then the positioning screws 27 around are gradually tightened so that the positioning screws 27 are pressed against the insulating pad 30, thereby fixing the positioning frame structure 11, and measuring the distance between the two sides by using the distance measurement detection system.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A distance measurement monitoring system for a water electrolysis hydrogen production device, comprising a left end pressure plate and a right end pressure plate, a plurality of electrolysis chambers are arranged between the left end pressure plate and the right end pressure plate, the left end pressure plate, the middle plate and the right end pressure plate are tightened and overlapped with the plurality of electrolysis chambers by a plurality of long bolts to form an electrolytic cell body, a disc spring assembly is arranged at one end of the long bolt, characterized in that: Preset monitoring points are arranged in pairs on the monitoring part of the electrolytic cell body, and also include a detection signal transmitting module or a detection signal receiving module arranged at the preset monitoring point, the detection signal transmitting module is used to send a detection signal for non-contact measurement, and the detection signal receiving module is used to receive the detection signal; also include a time measurement module and a data processing module; the detection signal transmitting module generates a trigger signal to the time measurement module when sending the detection signal and the detection signal receiving module receives the detection signal, the time measurement module calculates the time interval t between two trigger signals as the flight time of the detection signal, and the data processing module calculates the spacing l of the monitoring parts according to the time interval t and the detection signal propagation speed v; also includes a temperature detection unit for monitoring the temperature of the electrolytic cell body, and measures the temperature T of the electrolytic cell body while performing distance detection; also includes a comparison processing system, in which a database of theoretical spacings L of corresponding monitoring points of the electrolytic cell at different temperatures of the body is preset; the comparison processing system receives the temperature T of the electrolytic cell body and the calculated spacing l, and compares them with the range of the theoretical spacing L of the corresponding temperature in the database, and triggers the alarm system when the spacing l exceeds the range of the theoretical spacing L.

2. A distance measurement monitoring system for a water electrolysis hydrogen production device according to claim 1, characterized in that: The detection signal transmitting module is an ultrasonic ranging sensor, a laser ranging sensor or a radar ranging sensor.

3. A distance measurement monitoring system for a water electrolysis hydrogen production device according to claim 1, characterized in that: The comparison processing system is connected to the PLC control system of the electrolytic hydrogen production device, so that the PLC control system of the electrolytic hydrogen production device triggers the corresponding interlock according to the comparison processing result; or the PLC control system of the electrolytic hydrogen production device issues a detection command to trigger the distance measurement monitoring system to conduct regular detection.

4. The distance measurement monitoring system for a water electrolysis hydrogen production device according to claim 1 is characterized in that: The detection signal transmitting module and the detection signal receiving module are located at the same preset monitoring point, and a reflection component is arranged at another preset monitoring point corresponding to the preset monitoring point.

5. The distance measurement monitoring system for a water electrolysis hydrogen production device according to claim 1, characterized in that: The detection signal transmitting module and the detection signal receiving module are respectively arranged at two preset monitoring points of the monitoring part.

6. A distance measurement monitoring system for a water electrolysis hydrogen production device according to claim 1, characterized in that: The preset monitoring point is provided with a positioning frame structure for setting up a detection signal transmitting module or a detection signal receiving module.

7. The use of a distance measurement monitoring system for a water electrolysis hydrogen production device according to any one of claims 1 to 6, characterized in that: A positioning frame structure is set on the left end pressure plate and the right end pressure plate, and a distance measurement monitoring system is used to monitor the distance change between the two end pressure plates.

8. The use of a distance measurement monitoring system for a water electrolysis hydrogen production device according to any one of claims 1 to 6, characterized in that: A positioning frame structure is arranged on any end pressure plate, another positioning frame structure is arranged on the pole frame of a certain electrolytic chamber, and a distance measurement monitoring system is used to monitor the distance change between the end pressure plate and the predetermined electrolytic chamber.

9. The use of a distance measurement monitoring system for a water electrolysis hydrogen production device according to any one of claims 1 to 6, characterized in that: Positioning frame structures are respectively arranged on the insulating pads on both sides of the disc spring assembly at the end of the long bolt, and a distance measurement monitoring system is used to monitor the size change of the disc spring assembly.

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