A gasket, a sealing structure, an electrolytic cell and a temperature control system

Abstract

The utility model relates to a kind of sealing gasket, sealing structure, electrolytic cell and temperature control system, by setting up reaction cavity, heat dissipation groove, through hole one, through hole two and the mutual cooperation of sealing layer on the support of disc, the circulation delivery channel of electrolyte and coolant is provided, can guarantee good sealing property while, provide the basis for temperature adjustment in reaction cavity;Electrolyte in reaction cavity is transported in the process of water tank and returns reaction cavity, the temperature of electrolyte flowing out of electrolytic cell is monitored using temperature sensor, whether heating module is controlled according to the temperature of monitoring to heat the electrolyte in water tank and to sealing gasket for heat dissipation, and then the working temperature range of sealing gasket can be indirectly controlled in the preset range, to indirectly control sealing gasket's working temperature range.

Description

Technical Field

[0001] This utility model belongs to the field of electrolytic hydrogen production technology, and specifically relates to a sealing gasket, a sealing structure, an electrolytic cell, and a temperature control system. Background Technology

[0002] In current high-pressure hydrogen electrolyzers, sealing layers are installed on both sides of the diaphragm, and anode and cathode plates are installed at both ends of the two sealing layers to form the anode and cathode reaction chambers. After the electrolyte is delivered into the anode reaction chamber, an electrolytic reaction occurs in the cooperation of the anode, cathode, and diaphragm. Oxygen is produced in the anode reaction chamber, and hydrogen is produced in the cathode reaction chamber. However, the reaction chamber generates heat during the electrolysis process, and excessively high temperatures can adversely affect the sealing layers. Currently, the sealing layers are typically made of soft rubber materials, making it difficult to create heat dissipation channels and electrolyte delivery channels on them. This results in poor heat dissipation, and the electrolyte directly impacts the diaphragm when delivered to the anode reaction chamber, easily damaging the diaphragm.

[0003] Building upon the solutions to the above problems, a further step is needed: while dissipating heat from the sealing layer, the temperature of the electrolyte within the reaction chamber should also be adjusted to ensure it remains within a suitable temperature range. This prevents the sealing layer from operating at excessively high or low temperatures, thereby further guaranteeing its performance and lifespan. Utility Model Content

[0004] To address at least one of the above problems, the present invention provides the following technical solution:

[0005] A sealing gasket includes a disc-shaped support portion, a reaction chamber in the middle of the support portion, an annular heat dissipation groove on any end face of the support portion, at least two through holes I on the bottom wall of the heat dissipation groove, at least two through holes II on the support portion, the through holes II being located between the heat dissipation groove and the reaction chamber, a plurality of flow guide grooves connecting the through holes II and the reaction chamber, and a sealing layer on at least two end faces of the support portion.

[0006] Furthermore, there are four through holes, which are located on a virtual circle constructed with the reaction chamber at the center and are equally spaced.

[0007] Furthermore, there are two through holes, which are arranged symmetrically around the center of the reaction chamber.

[0008] A sealing structure includes a diaphragm and two sealing gaskets. The two sealing gaskets are respectively attached to the two end faces of the diaphragm with their ends away from the heat dissipation groove. A positive electrode plate and a negative electrode plate are respectively attached to the end faces of the two sealing gaskets. The diaphragm and the positive electrode plate are each provided with a plurality of through holes I, and the positive electrode plate and the negative electrode plate are each provided with a plurality of through holes II. The through holes I on the diaphragm and the through holes I on the sealing gaskets are aligned. The through holes I and II on the positive electrode plate are respectively aligned with the through holes I and II on the sealing gaskets connected to them. The through holes II on the negative electrode plate are aligned with the through holes II on the sealing gaskets connected to them.

[0009] An electrolytic cell includes the aforementioned sealing structure. An insulating plate one and an insulating plate two are respectively attached to the end faces of the anode plate and the cathode plate. An end plate one and an end plate two are respectively attached to the end faces of the insulating plate one and the insulating plate two. The insulating plate one and the end plate one each have multiple through holes one and two. The insulating plate two and the end plate two each have multiple through holes two. The through holes one on the insulating plate one, the through holes one on the end plate one, and the through holes one on the anode plate are aligned. The through holes two on the insulating plate one, the through holes two on the end plate one, and the through holes two on the anode plate are aligned. The through holes two on the cathode plate, the through holes two on the insulating plate two, and the through holes two on the end plate two are aligned.

[0010] Furthermore, the first end plate and the second end plate are connected by a connector, and a sealing layer is provided on both ends of the first insulating plate and the second insulating plate.

[0011] A temperature control system includes a water pump 1, a water pump 2, a heating module, a controller, and the aforementioned electrolytic cell. At least one through hole 2 on the end plate 1 is connected to the drain outlet of the water pump 1. The inlet of the water pump 1 is connected to a water tank. The heating module can heat the water in the water tank. The water tank is connected to the remaining through holes 2 on the end plate 1. A temperature sensor is provided on the inlet side of the water tank. At least one through hole 1 on the end plate 1 is connected to the water pump 2. The water pump 2 is connected to a radiator. The radiator is connected to the remaining through holes 1 on the end plate 1. The controller is electrically connected to the heating module, water pump 1, water pump 2, and the temperature sensor.

[0012] Furthermore, a liquid storage tank is connected between the radiator and the water pump, and a temperature sensor is provided on the water inlet side of the radiator.

[0013] Furthermore, the water tank is connected to the through hole 2 on the end plate 1 via a water pipe, the radiator is connected to the through hole 1 on the end plate 1 via a water pipe, the temperature sensor is mounted on the water pipe, and the controller is electrically connected to the radiator.

[0014] Furthermore, the heating module is an electric heating tube installed inside the water tank or an electric heating film installed on the outer wall of the water tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. By setting an annular heat dissipation groove on the end face of the rigid support and setting a sealing layer on both end faces of the support, good sealing performance can be provided, and the heat dissipation groove can be prevented from being blocked due to compression after installation, thus affecting the heat dissipation effect.

[0017] 2. The support section is provided with two through holes and a flow guide groove to make the electrolyte flow in and out of the reaction chamber in a direction that is close to parallel to the diaphragm. This can effectively reduce the force of the electrolyte on the diaphragm and thus reduce damage to the diaphragm.

[0018] 3. When the electrolyte circulates between the water tank and the electrolytic cell, the temperature of the electrolyte flowing into the water tank is monitored by a temperature sensor. When the temperature of the electrolyte flowing into the water tank is higher than the preset upper limit, it indicates that the temperature in the reaction chamber is too high. To prevent the sealing gasket from overheating, the heating module is controlled to stop heating the electrolyte, and water pump two is started to circulate the coolant between the radiator and the sealing gasket. The radiator is used to quickly cool the coolant, which can prevent the sealing gasket from overheating. When the temperature of the electrolyte flowing into the water tank is detected to be lower than the preset lower limit, the heating module is controlled to heat the electrolyte in the water tank. During this process, water pump two needs to be stopped to avoid heat dissipation from the sealing gasket, which can prevent the sealing gasket from overheating and keep the sealing gasket operating within the preset temperature range. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the sealing gasket structure;

[0020] Figure 2 Schematic diagram of the electrolytic cell Figure 1 ;

[0021] Figure 3 Schematic diagram of the electrolytic cell Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the working principle of a temperature control system (the arrows in the diagram indicate the direction of fluid flow).

[0023] In the diagram: 1. Support; 2. Through hole one; 3. Guide channel; 4. Through hole two; 5. Heat dissipation channel; 6. Sealing layer; 7. Reaction chamber; 8. End plate two; 9. Insulating plate two; 10. Cathode plate; 11. Diaphragm; 12. Connector; 13. End plate one; 14. Anode plate; 15. Radiator; 16. Water pump two; 17. Water pipe; 18. Temperature sensor; 19. Water pump one; 20. Water tank; 21. Heating module; 22. Controller; 23. Insulating plate one; 24. Liquid storage tank. Detailed Implementation

[0024] To better understand the technical content of this utility model, specific embodiments are provided below, and the utility model will be further described in conjunction with the accompanying drawings.

[0025] Example 1

[0026] See Figure 1 A sealing gasket is provided, including a disc-shaped support 1. The support 1 is made of a high-temperature and high-pressure resistant ceramic matrix composite material. A square reaction chamber 7 is provided in the middle of the support 1. An annular heat dissipation groove 5 is provided on one end face of the support 1. The heat dissipation groove 5 surrounds the outside of the reaction chamber 7 and is close to the edge of the reaction chamber 7, which is beneficial to improving the heat dissipation effect of the electrolyte in the reaction chamber 5. Four through holes 1 2 are provided on the bottom wall of the heat dissipation groove 5. The four through holes 1 2 are located on a virtual circle constructed with the reaction chamber 7 as the center and are equally spaced. Two through holes 2 4 are provided on the support 1. The two through holes 2 4 are symmetrically arranged based on the center of the reaction chamber 7 and are located between the heat dissipation groove 5 and the reaction chamber 7. Multiple guide grooves 3 are connected between the through holes 2 4 and the reaction chamber 7. The guide grooves 3 are opened on the same end face as the heat dissipation groove 5. The specific number of guide grooves 3 is not limited. Those skilled in the art can set it according to the specific implementation requirements. A sealing layer 6 is provided on the two end faces of the support 1. The sealing layer 6 is a rubber layer vulcanized on the end face of the support 1.

[0027] Based on the guide groove 3 and heat dissipation groove 5 opened on the end face of the support part 1, the guide groove 3 and heat dissipation groove 5 can be prevented from being squeezed and blocked during the application of the sealing gasket. Furthermore, the rubber vulcanized on the two end faces of the support part 1 after the guide groove 3, heat dissipation groove 5, through hole 1 2 and through hole 2 4 are opened can provide a good sealing effect. Moreover, the processing technology is simple and the processing cost is low.

[0028] Example 2

[0029] See Figures 2 to 3 A sealing structure is provided, including the sealing gasket in Embodiment 1. Two sealing gaskets are respectively aligned and attached to the two end faces of the diaphragm 11 with their end faces away from the heat dissipation groove 5. A positive electrode plate 14 and a negative electrode plate 10 are respectively aligned and attached to the end faces of the two sealing gaskets. The diaphragm 11 and the positive electrode plate 14 are each provided with four through holes 1 2. The positive electrode plate 14 and the negative electrode plate 10 are each provided with two through holes 2. The four through holes 1 2 on the diaphragm 11 are aligned with the four through holes 1 2 on the sealing gasket. The four through holes 1 2 and the two through holes 2 4 on the positive electrode plate 14 are respectively aligned with the four through holes 1 2 and the two through holes 2 4 on the sealing gasket connected to it. The two through holes 2 4 on the negative electrode plate 10 are aligned with the two through holes 2 4 on the sealing gasket connected to it.

[0030] After the anode plate 14, sealing gasket, diaphragm 11, sealing gasket and cathode plate 10 are installed in a sealed and aligned manner from top to bottom, the electrolyte flows into the upper reaction chamber 7 sequentially through the through hole 4 on the right side of the anode plate 14, the through hole 4 on the right side of the sealing gasket, and the guide groove 3 on the right side of the sealing gasket. Due to the action of the diaphragm 11, the electrolyte cannot flow into the lower reaction chamber 7. The electrolyte in the upper reaction chamber 7 undergoes an electrolytic reaction under the combined action of the anode plate 14, cathode plate 10 and diaphragm 11, producing oxygen in the upper reaction chamber 7 and hydrogen in the lower reaction chamber 7. The oxygen and the remaining electrolyte in the upper reaction chamber 7 will flow out sequentially through the guide groove 3 on the left side of the sealing gasket, the through hole 4 on the left side of the sealing gasket and the through hole 4 on the left side of the anode plate 14.

[0031] When the sealing gasket needs to be cooled, the coolant will flow into the right side of the heat dissipation tank 5 through the two through holes 12 on the right side of the anode plate 14 and the two through holes 12 on the right side of the upper sealing gasket. After the coolant flows to the right side of the heat dissipation tank 5, it will flow out through the two through holes 12 on the left side of the sealing gasket and the two through holes 12 on the left side of the anode plate 14.

[0032] The hydrogen gas generated in the lower reaction chamber 7 will flow out through the guide groove 3 and through hole 4 on the lower sealing gasket and through hole 4 on the cathode plate 10.

[0033] Example 3

[0034] See Figures 2 to 3 An electrolytic cell is provided, including the sealing structure of Embodiment 2. Insulating plate 123 and insulating plate 9 are respectively aligned and attached to the end faces of the anode plate 14 and the cathode plate 10. End plate 13 and end plate 8 are respectively aligned and attached to the end faces of the insulating plate 123 and the insulating plate 9. Insulating plate 123 and end plate 13 each have four through holes 2 and two through holes 4. Insulating plate 29 and end plate 28 each have two through holes 4. The through holes 2 on insulating plate 123, the through holes 2 on end plate 13, and the anode plate 14... The through holes 1 and 2 on the insulating plate 1 and 23, the through holes 2 and 4 on the end plate 13 and the anode plate 14 are aligned, and the through holes 2 and 4 on the cathode plate 10, the insulating plate 2 and 9 and the end plate 2 and 8 are aligned. The end plate 13 and the end plate 2 and 8 are connected by bolts, nuts and other connecting parts 12. Both ends of the insulating plate 1 and the insulating plate 2 and 9 have vulcanized rubber sealing layers 6, which ensures the sealing between the three when the two ends of the insulating plate are respectively attached to the end plate and the electrode plate.

[0035] After the end plate 13 and end plate 28 are tightened by the two connectors 12, a sealed connection is formed between the end plate 13, the insulating plate 23, the anode plate 14, the diaphragm 11, the cathode plate 10, the insulating plate 29, and the end plate 28. At this time, the electrolyte flows into the through hole 24 on the right side of the anode plate 14 through the through hole 24 on the right side of the end plate 13 and the insulating plate 23; while the electrolyte in the through hole 24 on the right side of the anode plate 14 flows out through the through hole 24 on the left side of the insulating plate 23 and the through hole 24 on the left side of the end plate 13.

[0036] Hydrogen gas in the through hole 4 on the negative electrode plate 10 will flow out through the through hole 4 on the insulating plate 9 and the end plate 8.

[0037] Example 4

[0038] See Figure 4 A temperature control system is provided, including a water pump 19, a water pump 26, a heating module 21, a controller 22, and an electrolytic cell as described in Embodiment 3. A through-hole 24 on the right side of end plate 13 is connected to the inlet of water pump 19 via a water pipe 17. The outlet of water pump 19 is connected to a water tank 20 via the water pipe 17. A temperature sensor 18 is installed on the water pipe 17. The water tank 20 stores electrolyte for electrolysis. The heating module 21 heats the water in the water tank 20. The heating module 21 is either an electric heating element installed inside the water tank 20 or located on the outer wall of the water tank 20. The electric heating film and water tank 20 are connected to another through hole 4 on end plate 13 via water pipe 17. Two through holes 2 on the right side of end plate 13 are connected to the drain outlet of water pump 16 via two water pipes 17. The inlet of water pump 16 is connected to radiator 15 via water pipe 17. Radiator 15 is connected to two through holes 2 on the left side of end plate 13 via two water pipes 17. Temperature sensor 18 is provided on either of the two water pipes 17. Controller 22 is electrically connected to heating module 21, water pump 19, water pump 16 and temperature sensor 18.

[0039] During electrolysis, the controller 22 controls the water pump 19 to be in the start state, causing the electrolyte to circulate between the water tank 20 and the electrolytic cell. The water pump 19 delivers the electrolyte in the water tank 20 to the through hole 4 on the right side of the end plate 13, and then flows into the upper reaction chamber 7 for electrolysis. The electrolyte in the upper reaction chamber 7 flows into the water tank 20 through the through hole 4 on the left side of the end plate 13. During this process, the temperature sensor 18 detects the temperature of the electrolyte and transmits it to the controller 22. This temperature is equivalent to the temperature inside the reaction chamber 7. The controller 22 has preset upper and lower temperature range values ​​(30- When the temperature of the electrolyte flowing into the water tank 20 exceeds the preset upper limit (60℃), it indicates that the temperature inside the reaction chamber 7 is too high. To prevent the sealing gasket from overheating, if the heating module 21 is in operation, the controller 22 controls the heating module 21 to stop heating the electrolyte in the water tank 20. The controller 22 controls the second water pump 16 to start, causing the coolant to circulate between the radiator 15 and the electrolytic cell. The controller 22 controls the radiator 15 to start, forcibly dissipating the coolant, thus preventing the sealing gasket from overheating. When the temperature of the electrolyte flowing into the water tank 20 is detected to be lower than the preset lower limit, the controller 22 controls the heating module 21 to heat the electrolyte in the water tank 20. If the second water pump 16 is in operation, the controller 22 controls the second water pump 16 to stop working, so as to avoid dissipating heat from the sealing gasket, thus preventing the sealing gasket from overheating and indirectly controlling the sealing gasket to operate within the preset temperature range.

[0040] Preferably, a liquid storage tank 24 is connected between the radiator 15 and the second water pump 16. The liquid storage tank 24 is used to store coolant. The liquid storage tank 24 is connected to the water inlet end of the second water pump 16 through two water pipes 17, and the liquid storage tank 24 is also connected to the drain end of the radiator 15 through two water pipes 17. A temperature sensor 18 is provided on the water inlet side of the radiator 15 to monitor the temperature of the coolant flowing out of the sealing gasket during the cooling process, which is equivalent to monitoring the temperature inside the sealing gasket. When the monitored temperature is lower than the preset value, the controller 22 controls the second water pump 16 to stop working in order to avoid excessive cooling and causing the sealing gasket temperature to be too low.

[0041] Preferably, water pump 19 is connected to water tank 20 via water pipe 17, the drain outlet of water pump 16 is connected to the corresponding through hole 2 via water pipe 17, radiator 15 is connected to through hole 2 via water pipe 17, and temperature sensor 18 is mounted on water pipe 17 for easy installation.

[0042] It should be noted that, for the purpose of understanding the technical solution of this utility model, the directions mentioned in this embodiment, such as up, down, left, and right, are directions for reference in the accompanying drawings, rather than directions for actual application.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sealing gasket, characterized in that: The device includes a support section, a reaction chamber in the middle of the support section, a heat dissipation groove on any end face of the support section, at least two through holes 1 on the bottom wall of the heat dissipation groove, at least two through holes 2 on the support section, the through holes 2 being located between the heat dissipation groove and the reaction chamber, and multiple guide grooves connecting the through holes 2 and the reaction chamber, and a sealing layer on at least two end faces of the support section.

2. The sealing gasket according to claim 1, characterized in that: The number of through holes is four, and the four through holes are located on a virtual circle constructed with the reaction chamber as the center and are equally spaced.

3. A sealing gasket according to claim 1, characterized in that: The number of the two through holes is two, and the two through holes are arranged symmetrically around the center of the reaction chamber.

4. A sealing structure, characterized in that: The device includes a diaphragm and two sealing gaskets as described in any one of claims 1 to 3. The two sealing gaskets are respectively attached to the two end faces of the diaphragm with their end faces away from the heat dissipation groove. A positive electrode plate and a negative electrode plate are respectively attached to the end faces of the two sealing gaskets. The diaphragm and the positive electrode plate are each provided with a plurality of through holes I, and the positive electrode plate and the negative electrode plate are each provided with a plurality of through holes II. The through holes I on the diaphragm and the through holes I on the sealing gasket are aligned. The through holes I and II on the positive electrode plate are respectively aligned with the through holes I and II on the sealing gasket connected to them. The through holes II on the negative electrode plate are aligned with the through holes II on the sealing gasket connected to them.

5. An electrolytic cell, characterized in that: The sealing structure includes the one described in claim 4, wherein an insulating plate 1 and an insulating plate 2 are respectively attached to the end faces of the anode plate and the cathode plate, and an end plate 1 and an end plate 2 are respectively attached to the end faces of the insulating plate 1 and the insulating plate 2. The insulating plate 1 and the end plate 1 are each provided with a plurality of through holes 1 and 2, and the insulating plate 2 and the end plate 2 are each provided with a plurality of through holes 2. The through holes 1 on the insulating plate 1, the through holes 1 on the end plate 1, and the through holes 1 on the anode plate are aligned. The through holes 2 on the insulating plate 1, the through holes 2 on the end plate 1, and the through holes 2 on the anode plate are aligned. The through holes 2 on the cathode plate, the through holes 2 on the insulating plate 2, and the through holes 2 on the end plate 2 are aligned.

6. An electrolytic cell according to claim 5, characterized in that: The first end plate and the second end plate are connected by a connector, and a sealing layer is provided on both ends of the first and second insulating plates.

7. A temperature control system, characterized in that: The device includes a water pump 1, a water pump 2, a heating module, a controller, and an electrolytic cell as described in claim 5. At least one through hole 2 on the end plate 1 is connected to the drain outlet of the water pump 1, the inlet of the water pump 1 is connected to a water tank, the heating module can heat the water in the water tank, the water tank is connected to the remaining through holes 2 on the end plate 1, a temperature sensor is provided on the inlet side of the water tank, at least one through hole 1 on the end plate 1 is connected to the water pump 2, the water pump 2 is connected to a radiator, the radiator is connected to the remaining through holes 1 on the end plate 1, and the controller is electrically connected to the heating module, water pump 1, water pump 2, and temperature sensor.

8. A temperature control system according to claim 7, characterized in that: A liquid storage tank is connected between the radiator and the water pump, and a temperature sensor is installed on the water inlet side of the radiator.

9. A temperature control system according to claim 8, characterized in that: The water tank is connected to the through hole 2 on the end plate 1 by a water pipe, the radiator is connected to the through hole 1 on the end plate 1 by a water pipe, the temperature sensor is located on the water pipe, and the controller is electrically connected to the radiator.

10. A temperature control system according to claim 7, characterized in that: The heating module is an electric heating tube installed inside the water tank or an electric heating film installed on the outer wall of the water tank.

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