Diaphragm pressure resistance testing device

Abstract

The utility model discloses a diaphragm withstand voltage testing device, which comprises two symmetrically arranged end pressing plates, two supporting separation nets and two electrodes, the opposite sides of the two end pressing plates are provided with first grooves, the first grooves accommodate the supporting separation nets, the two electrodes are respectively arranged on the opposite sides of the two supporting separation nets, and the two ends of the two supporting separation nets are provided with second grooves. A test diaphragm is located between the two electrodes, the two end pressing plates are pressed through a locking piece to form a small electrolysis chamber and press the edge of the test diaphragm, two pipe joints are arranged on the end pressing plates and communicate with the first groove, one of the pipe joints is used for injecting electrolyte, and the other pipe joint is used for pressing the edge of the test diaphragm. And the other pipe joint is used for discharging electrolyte, and a glass window is arranged in the middle of the end pressing plate. According to the utility model, the aerophobic and hydrophilic performance of the diaphragm can be accurately judged and tested, the diaphragm with good pressure resistance can be conveniently screened out, and the safety and stability of the operation of the electrolytic cell are improved.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a diaphragm pressure resistance testing device. Background Technology

[0002] Hydrogen energy is widely used in transportation, steelmaking, chemical industry, power generation, heating and other fields. Hydrogen production is the foundation of various hydrogen energy application pathways, and water electrolysis hydrogen production technology is the most important way to build an electric hydrogen energy structure and help new energy achieve large-scale conversion and utilization.

[0003] Alkaline electrolysis technology is currently the most mature technology in the field of water electrolysis. Its basic principle of hydrogen production is: under the action of electric current, water is decomposed into hydrogen and oxygen through electrochemical reaction, and then hydrogen and oxygen are released at the cathode and anode of the electrolyzer, respectively.

[0004] In alkaline water electrolysis for hydrogen production, the diaphragm is one of the core components, and its performance directly determines the efficiency, safety, and service life of the electrolyzer. The main function of the diaphragm is to physically isolate the cathode (hydrogen evolution reaction) and anode (oxygen evolution reaction) regions, preventing the risk of explosion caused by the mixing of hydrogen and oxygen, while allowing hydroxide ions to migrate freely under the influence of the electric field to complete the current loop.

[0005] With the application of hydrogen energy in emerging scenarios such as transportation (hydrogen fuel cell vehicles) and energy storage (wind-solar-hydrogen production coupling), electrolyzers are required to be upgraded to higher current density and faster start-stop. The pore structure and mechanical strength of the membrane material need to be further optimized, and the upgrading and replacement of membranes is intensifying. Therefore, rapid testing of the membrane is necessary.

[0006] However, existing testing instruments cannot observe the test diaphragm during testing, making it difficult for operators to judge the performance of the test diaphragm. Utility Model Content

[0007] To overcome the shortcomings of the existing technology, this utility model provides a diaphragm pressure resistance testing device, which can accurately determine the gas-repellent and hydrophilic properties of the test diaphragm, making it easier to screen out diaphragms with good pressure resistance and improve the safety and stability of electrolytic cell operation.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] A diaphragm withstand voltage testing device includes two symmetrically arranged end plates, two supporting meshes, and two electrodes. Each of the two end plates has a first groove on one side of its opposite side, which accommodates the supporting mesh. The two electrodes are located on opposite sides of the two supporting meshes, and the test diaphragm is located between the two electrodes. The two end plates are pressed together by a locking member to form an electrolytic chamber and to press the edge of the test diaphragm tightly. Two pipe joints are provided on each end plate, both communicating with the first groove. One pipe joint is used to inject electrolyte, and the other is used to discharge electrolyte. A first threaded hole is provided on the edge of each end plate for connecting an external cable. A glass mounting hole is provided in the middle of each end plate, communicating with the first groove, and a glass window is installed in the glass mounting hole.

[0010] As a further improvement to the above technical solution, the end pressure plate and the glass window are sealed by a sealing ring, and a sealing groove is provided on the side wall of the glass mounting hole, the sealing groove being used to install the sealing ring.

[0011] As a further improvement to the above technical solution, the number of both the sealing ring and the sealing groove is two.

[0012] As a further improvement to the above technical solution, a glass retaining ring is connected to one end face of the end plate away from the first groove, and the glass retaining ring is used to fix the glass window.

[0013] As a further improvement to the above technical solution, the glass pressure ring is mounted on the end face of the end pressure plate by a number of first bolts. The end pressure plate is provided with a number of second threaded holes, and the glass pressure ring is provided with a number of first through holes. The number of first through holes corresponds one-to-one with the number of second threaded holes. The first through holes accommodate the threaded rod of the first bolt through which it passes, and the second threaded holes are threadedly connected to the first bolt.

[0014] As a further improvement to the above technical solution, the edge of the end pressure plate is provided with a number of second through holes, and the locking member includes a number of second bolts and nuts. The screw of the second bolt passes through the corresponding second through holes on two end pressure plates in sequence and is threadedly connected to the nut.

[0015] As a further improvement to the above technical solution, a sealing gasket is provided between the two end pressure plates.

[0016] As a further improvement to the above technical solution, the contact surface between the end pressure plate and the sealing gasket is provided with water ripple lines.

[0017] As a further improvement to the above technical solution, one end face of one of the end pressure plates is provided with a second groove, the second groove accommodating the test diaphragm.

[0018] As a further improvement to the above technical solution, the end pressure plate, the supporting mesh, and the electrode are all circular structures.

[0019] The beneficial effects of this utility model are as follows: This utility model provides a diaphragm pressure resistance testing device. By setting a glass window in the end pressure plate, the operator can directly observe the reaction on the surface of the test diaphragm through the glass window. Thus, the gas-repellent and hydrophilic properties of the test diaphragm can be accurately judged, making it easier to screen out diaphragms with good pressure resistance and improving the safety and stability of the electrolytic cell operation. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a structural schematic diagram provided by an example of this utility model;

[0022] Figure 2 yes Figure 1 A sectional view;

[0023] Figure 3 yes Figure 1 The exploded sectional view.

[0024] Reference numerals: 1-End pressure plate, 2-Support mesh, 3-Electrode, 4-Pipe connector, 5-Glass window, 6-Sealing ring, 7-Glass pressure ring, 8-Sealing gasket, 9-Test diaphragm, 11-First groove, 12-First threaded hole, 13-Second threaded hole, 14-Second through hole, 15-Water ripple line, 16-Second groove, 71-First through hole. Detailed Implementation

[0025] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0026] Reference Figures 1 to 3This utility model provides a diaphragm withstand pressure testing device, comprising two symmetrically arranged end pressure plates 1, two supporting meshes 2, and two electrodes 3. Each end pressure plate 1 has a first groove 11 on its opposite side, which accommodates the supporting meshes 2. The two electrodes 3 are located on opposite sides of the two supporting meshes 2, and a test diaphragm 9 is located between the two electrodes 3. One electrode 3 is the cathode, and the other electrode 3 is the anode. The two end pressure plates 1 are pressed together by a locking member to form an electrolytic chamber, thus pressing the edge of the test diaphragm 9. Two pipe joints 4 are provided on the end pressure plates 1, both of which communicate with the first grooves 11. One pipe joint 4 is used to inject electrolyte, and the other pipe joint 4 is used to discharge electrolyte. A first threaded hole 12 is provided on the edge of the end pressure plate 1 for connecting an external cable. A glass mounting hole is provided in the middle of the end pressure plate 1, communicating with the first groove 11, and a glass window 5 is installed in the glass mounting hole.

[0027] During assembly, the two end plates 1 are arranged symmetrically. A support mesh 2 is placed in the first groove 11 on the opposite side of the end plates 1. Then, the two electrodes 3 are placed on the opposite side of the two support meshes 2. The test diaphragm 9 is then placed between the two electrodes 3. Finally, the two end plates 1 are pressed together by the locking device to form an electrolysis chamber, while the edge of the test diaphragm 9 is pressed tightly.

[0028] During testing, electrolyte is injected into one of the pipe joints 4, forming a flow channel within the supporting mesh 2 to fill the electrolysis chamber. During or after the test, the electrolyte can be discharged through the other pipe joint 4. Positive and negative DC power cables are connected to the first threaded holes 12 on the two end plates 1, respectively. An electrochemical reaction occurs on the two electrodes 3 inside the electrolysis chamber, decomposing the water in the electrolyte into hydrogen and oxygen. Subsequently, hydrogen and oxygen are released at the cathode and anode of the electrolysis chamber, respectively. The gas production rate is controlled by adjusting the input current, further controlling the pressure difference across the test diaphragm 9, thus achieving pressure resistance testing of the diaphragm under different pressures. Simultaneously, the operator can directly observe the reaction on the surface of the test diaphragm 9 through the glass window 5, thereby accurately judging the gas-repellent and hydrophilic properties of the test diaphragm 9, facilitating the selection of diaphragms with good pressure resistance, and improving the safety and stability of the electrolytic cell operation.

[0029] In some preferred embodiments, the end pressure plate 1 and the glass window 5 are sealed by a sealing ring 6, and a sealing groove is provided on the side wall of the glass mounting hole for installing the sealing ring 6.

[0030] Understandably, by setting the sealing ring 6, the electrolyte in the electrolysis chamber can be prevented from leaking out from the gap between the end pressure plate 1 and the glass window 5, thereby improving the sealing performance of the device.

[0031] Furthermore, there are two sealing rings 6 and two sealing grooves. The two sealing rings 6 can form a double sealing barrier, further reducing the risk of electrolyte leakage.

[0032] In some preferred embodiments, a glass retaining ring 7 is connected to the end face of the end plate 1 away from the first groove 11. The glass retaining ring 7 is used to fix the glass window 5, thereby preventing the glass window 5 from shifting or loosening due to vibration or external force during the test, and improving stability.

[0033] Furthermore, the glass pressure ring 7 is mounted on the end face of the end pressure plate 1 by a number of first bolts (not shown in the figure). The end pressure plate 1 is provided with a number of second threaded holes 13, and the glass pressure ring 7 is provided with a number of first through holes 71. The number of first through holes 71 corresponds one-to-one with the number of second threaded holes 13. The threaded rod of the first bolt passes through the first through hole 71, and the second threaded hole 13 is threadedly connected to the first bolt.

[0034] Understandably, when installing the glass window 5, the sealing ring 6 is first placed in the sealing groove, then the glass window 5 is installed in the glass mounting hole, and then the glass pressure ring 7 is placed on the end face of the end pressure plate 1, with the first through holes 71 corresponding one-to-one with the second threaded holes 13. Finally, the first bolts are tightened into the second threaded holes 13 respectively, so that the glass pressure ring 7 fixes the glass window 5 in the end pressure plate 1. When the glass window 5 needs to be replaced, only the first bolts need to be unscrewed and the glass pressure ring 7 needs to be removed, so that the old glass window 5 can be easily removed and the new glass window 5 can be installed. Thus, the glass window 5 can be quickly installed and removed, which facilitates the inspection and maintenance of the glass window 5 and reduces maintenance time and costs.

[0035] In some preferred embodiments, the glass window 5 is tempered borosilicate glass, which has the characteristics of alkali resistance, high transparency and high strength. Therefore, it can withstand the corrosion of alkaline electrolyte and high temperature environment, ensuring the stability of long-term testing.

[0036] In some preferred embodiments, the edge of the end plate 1 is provided with a plurality of second through holes 14, and the locking element includes a plurality of second bolts (not shown in the figure) and nuts (not shown in the figure). The screw of the second bolt passes through the corresponding second through holes 14 on the two end plates 1 in sequence and is threadedly connected to the nut.

[0037] Understandably, by symmetrically locking multiple second bolts and nuts, it can be ensured that the two end pressure plates 1 apply uniform clamping force to the edge of the test diaphragm 9, avoiding seal failure or damage to the test diaphragm 9 caused by local stress concentration. Moreover, it can also facilitate the quick assembly and disassembly of the two end pressure plates 1, improving assembly efficiency.

[0038] Furthermore, a sealing gasket 8 is provided between the two end pressure plates 1. The sealing gasket 8 can fill the contact gap between the two end pressure plates 1, thereby effectively preventing electrolyte leakage or intrusion of external impurities in the electrolysis chamber. Moreover, the sealing gasket 8 can buffer the mechanical stress of the end pressure plates 1 during locking through its own elastic deformation, avoiding damage to the edge of the test diaphragm 9 due to local pressure concentration. At the same time, it can also reduce the direct contact between the two end pressure plates 1, reducing wear on the two end pressure plates 1 during repeated disassembly and assembly.

[0039] Furthermore, the contact surface between the end pressure plate 1 and the sealing gasket 8 is provided with water ripple lines 15. The water ripple lines 15 can increase the friction and tightness of the contact surface between the end pressure plate 1 and the sealing gasket 8, prevent the sealing gasket 8 from shifting, and form a multi-point dispersed sealing barrier to effectively prevent electrolyte leakage between the end pressure plate 1 and the sealing gasket 8.

[0040] In some preferred embodiments, one end face of one of the end pressure plates 1 is provided with a second groove 16, which accommodates the test diaphragm 9. The test diaphragm 9 is limited by the second groove 16, thereby reducing the impact of the positional deviation during worker installation on the test results.

[0041] The depth of the second groove 16 matches the thickness of the test diaphragm 9, which can prevent the test diaphragm 9 from wrinkling under pressure, causing local sealing failure or stress concentration rupture.

[0042] In some preferred embodiments, the end pressure plate 1, the support mesh 2, and the electrode 3 are all circular structures. The circular structure has no sharp corners, and when the end pressure plate 1 is locked, it can achieve uniform pressure in the circumference, avoiding the failure of the edge seal or local damage of the test diaphragm 9 due to stress concentration at the corners of the square structure.

[0043] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A diaphragm pressure resistance testing device, characterized in that, The device includes two symmetrically arranged end plates, two supporting meshes, and two electrodes. Each of the two end plates has a first groove on one side, which accommodates the supporting mesh. The two electrodes are located on opposite sides of the two supporting meshes. A test diaphragm is located between the two electrodes. The two end plates are pressed together by a locking device to form an electrolysis chamber and to press the edge of the test diaphragm. Each end plate has two pipe connectors, both of which communicate with the first groove. One pipe connector is used to inject electrolyte, and the other is used to discharge electrolyte. Each end plate has a first threaded hole on its edge for connecting an external cable. A glass mounting hole is located in the middle of each end plate, communicating with the first groove, and a glass window is installed in the glass mounting hole.

2. The diaphragm pressure resistance testing device according to claim 1, characterized in that, The end pressure plate and the glass window are sealed by a sealing ring, and a sealing groove is provided on the side wall of the glass mounting hole for installing the sealing ring.

3. The diaphragm pressure resistance testing device according to claim 2, characterized in that, The number of the sealing rings and the sealing grooves are both two.

4. The diaphragm pressure resistance testing device according to claim 1, characterized in that, A glass retaining ring is connected to one end face of the end plate away from the first groove, and the glass retaining ring is used to fix the glass window.

5. The diaphragm pressure resistance testing device according to claim 4, characterized in that, The glass pressure ring is mounted on the end face of the end pressure plate by a plurality of first bolts. The end pressure plate is provided with a plurality of second threaded holes, and the glass pressure ring is provided with a plurality of first through holes. The plurality of first through holes correspond one-to-one with the plurality of second threaded holes. The first through holes accommodate the threaded rod of the first bolt through which it passes, and the second threaded holes are threadedly connected to the first bolt.

6. The diaphragm pressure resistance testing device according to claim 1, characterized in that, The edge of the end pressure plate is provided with a number of second through holes, and the locking member includes a number of second bolts and nuts. The screw of the second bolt passes through the corresponding second through holes on two end pressure plates in sequence and is threadedly connected to the nut.

7. The diaphragm pressure resistance testing device according to claim 1, characterized in that, A sealing gasket is provided between the two end pressure plates.

8. The diaphragm pressure resistance testing device according to claim 7, characterized in that, The contact surface between the end pressure plate and the sealing gasket is provided with water ripple lines.

9. The diaphragm pressure resistance testing device according to claim 1, characterized in that, One end face of one of the end pressure plates is provided with a second groove, which accommodates the test diaphragm.

10. A diaphragm pressure resistance testing device according to claim 1, characterized in that, The end pressure plate, the supporting mesh, and the electrode are all circular structures.

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