Hydrogen production device

Abstract

The hydrogen production device comprises an electrolysis structure and a clamping mechanism, the clamping mechanism comprises a positive electrode pressing plate, a negative electrode pressing plate, a positive electrode plate, a negative electrode plate and an adjusting assembly, the positive electrode pressing plate is opposite to the negative electrode pressing plate, and the positive electrode plate and the negative electrode plate are correspondingly arranged on the two opposite sides of the positive electrode pressing plate and the negative electrode pressing plate in a cushioned mode; the electrolysis structure is clamped between the positive plate and the negative plate, the adjusting assembly is connected between the positive pressing plate and the negative pressing plate, and a water inlet connector, a water return connector and a hydrogen outlet connector are formed in the side, back to the negative pressing plate, of the positive pressing plate. The electrolysis structure comprises an electrolysis unit and an outer sealing assembly, the outer sealing assembly comprises a supporting ring and an elastic sealing ring, the electrolysis unit is sleeved with the supporting ring, the periphery of the electrolysis unit is sleeved with the elastic sealing ring, and the thickness of the elastic sealing ring is larger than the thickness of the supporting ring and the thickness of the electrolysis unit. Good sealing performance can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production, and in particular to a hydrogen production device. Background Art

[0002] The PEM (Proton Exchange Membrane) water electrolysis hydrogen production device uses a proton exchange membrane as the core material of the electrolyzer to decompose water, thereby producing hydrogen. The PEM water electrolyzer hydrogen production device has the advantages of high efficiency and fast reaction speed to improve the efficiency of hydrogen production.

[0003] However, since the hydrogen production device produces high-pressure hydrogen, and hydrogen has an extremely low molecular weight and is easy to diffuse, if the sealing design of the hydrogen production device is not strict, hydrogen is easy to leak into the external environment. Summary of the invention

[0004] The purpose of the present invention is to provide a hydrogen production device to ensure better sealing performance.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A hydrogen production device comprises: an electrolysis structure and a clamping mechanism, wherein the clamping mechanism is used to clamp the electrolysis structure;

[0007] The clamping mechanism comprises a positive pressure plate, a negative pressure plate, a positive plate, a negative plate and an adjusting component, the positive pressure plate and the negative pressure plate are opposite to each other, the positive plate and the negative plate are correspondingly padded on both sides of the positive pressure plate and the negative pressure plate opposite to each other, the electrolysis structure is clamped between the positive plate and the negative plate, the adjusting component is connected between the positive pressure plate and the negative pressure plate to adjust the distance between the positive pressure plate and the negative pressure plate, and a water inlet interface, a water return interface and a hydrogen outlet interface are provided on the side of the positive pressure plate facing away from the negative pressure plate;

[0008] The electrolysis structure includes an electrolysis unit and an external sealing component, the external sealing component includes a support ring and an elastic sealing ring, the support ring is sleeved outside the electrolysis unit, a sealed space is formed between the support ring, the electrolysis unit, the positive plate and the negative plate, the elastic sealing ring is arranged in the sealed space and sleeved on the outer periphery of the electrolysis unit, the thickness of the elastic sealing ring in the direction from the positive plate to the negative plate is greater than the thickness of the support ring in the direction from the positive plate to the negative plate, and is also greater than the thickness of the electrolysis unit in the direction from the positive plate to the negative plate, the cross-section of the elastic sealing ring is rectangular, and the water inlet interface, the water return interface and the hydrogen outlet interface of the positive plate are all connected to the electrolysis unit.

[0009] In some embodiments, the electrolytic structure is provided in plurality, and the plurality of electrolytic structures are stacked in sequence, and a titanium plate is provided between two adjacent electrolytic structures; and in the electrolytic structure adjacent to the positive electrode plate, the support ring, the electrolytic unit, the positive electrode plate, and the titanium plate cooperate to form the sealed space;

[0010] In the electrolysis structure adjacent to the negative electrode plate, the support ring and the electrolysis unit form the sealed space with the negative electrode plate and the titanium plate;

[0011] In other electrolysis structures, the support ring and the electrolysis unit form the sealed space with the two adjacent titanium plates.

[0012] In some embodiments, a positioning ring is further included, which is arranged on a side of the electrolytic structure close to the positive electrode pressure plate. A positioning groove is circumferentially opened on the side of the positioning ring close to the electrolytic structure, and a portion of the elastic sealing ring enters the positioning groove.

[0013] In some embodiments, the outer sealing assembly further includes a supporting sealing gasket, the supporting ring is a stainless steel supporting ring, and the supporting sealing gaskets are attached to both sides of the supporting ring.

[0014] In some embodiments, the electrolysis unit includes a membrane electrode, a titanium sheet, a first drainage ring and a second drainage ring, the first drainage ring, the membrane electrode and the second drainage ring are stacked together in sequence, the membrane electrode is circular, the outer diameter of the first drainage ring and the outer diameter of the second drainage ring are both larger than the outer diameter of the membrane electrode, the first drainage ring and the second drainage ring clamp the outer periphery of the membrane electrode, the first drainage ring is provided with a hydrogen outlet channel connected to one side of the membrane electrode, the second drainage ring is provided with a water inlet channel and a water return channel both connected to the other side of the membrane electrode, two titanium sheets are provided, and the two titanium sheets are correspondingly connected to the two sides of the membrane electrode, the water inlet interface, the water return interface and the hydrogen outlet interface of the positive electrode pressure plate are correspondingly connected to the water inlet channel, the water return channel and the hydrogen outlet channel of the electrolysis unit.

[0015] In some embodiments, when the elastic sealing ring is squeezed by the clamping mechanism, the inner periphery of the elastic sealing ring is tightly wrapped around the outer periphery of the first drainage ring and the second drainage ring, and the inner periphery of the elastic sealing ring is squeezed into between the first drainage ring and the second drainage ring.

[0016] In some embodiments, the electrolysis unit also includes an intermediate sealing ring and an end sealing ring, the intermediate sealing ring is clamped between the first drainage ring and the second drainage ring, the membrane electrode is clamped between the first drainage ring and the intermediate sealing ring, or the membrane electrode is clamped between the second drainage ring and the intermediate sealing ring, and the end sealing rings are attached to both sides of the first drainage ring and the second drainage ring facing away from each other.

[0017] In some embodiments, the first guide ring is provided with a hydrogen outlet along the axial direction, and a hydrogen outlet groove is provided on a side of the first guide ring facing away from the second guide ring, one end of the hydrogen outlet groove is connected to the hydrogen outlet, and the other end of the hydrogen outlet groove passes through the inner ring of the first guide ring, and the hydrogen outlet and the hydrogen outlet groove form the hydrogen outlet channel;

[0018] The second drainage ring is axially provided with a water inlet and a water return port, and the second drainage ring is provided with a water inlet groove and a water return groove on the side facing away from the first drainage ring, one end of the water inlet groove is connected with the water inlet, and the other end of the water inlet groove passes through the inner circle of the second drainage ring, one end of the water return groove is connected with the water return port, and the other end of the water return groove passes through the inner circle of the second drainage ring, the water inlet and the water inlet groove form the water inlet channel, and the water return port and the water return groove form the water return channel.

[0019] In some embodiments, a plurality of water inlet grooves are provided on a side of the second drainage ring facing away from the first drainage ring, one end of the plurality of water inlet grooves is connected to the water inlet, and the other end of the plurality of water inlet grooves radially extends to the inner circle of the second drainage ring.

[0020] In some embodiments, the thickness of the second guide ring in the axial direction is T 1 mm, the depth of the water inlet groove in the axial direction of the second drainage ring is D 1 mm, where 0.2≤D 1 / T 1 ≤0.7;

[0021] The surface area of ​​the inner ring of the second guide ring is S 1 mm 2 The total opening area of ​​the plurality of water inlet grooves in the inner ring of the second drainage ring is S 2 mm 2 , where 0.005≤S 2 / S 1 ≤0.03.

[0022] In some embodiments, a plurality of return water grooves are provided on a side of the second drainage ring facing away from the first drainage ring, one end of the plurality of return water grooves is connected to the return water port, and the other end of the plurality of return water grooves radially extends to the inner circle of the second drainage ring.

[0023] In some embodiments, the thickness of the second guide ring in the axial direction is T 1 mm, the depth of the return groove in the axial direction of the second drainage ring is D 2 mm, where 0.2≤D 2 / T 1 ≤0.7;

[0024] The surface area of ​​the inner ring of the second guide ring is S 1 mm 2 The total opening area of ​​the plurality of return water grooves in the inner ring of the second drainage ring is S 3 mm 2 , where 0.005≤S 3 / S 1 ≤0.03.

[0025] In some embodiments, a plurality of hydrogen outlet grooves are provided on a side of the first guide ring facing away from the second guide ring, one end of the plurality of hydrogen outlet grooves is connected to the hydrogen outlet port, and the other end of the plurality of hydrogen outlet grooves radially extends to the inner ring of the first guide ring.

[0026] In some embodiments, the thickness of the first guide ring in the axial direction is T 2 mm, the depth of the hydrogen outlet groove in the axial direction of the first guide ring is D 3 mm, where 0.2≤D 3 / T 2 ≤0.7;

[0027] The surface area of ​​the inner ring of the first guide ring is S 4 mm 2 The total opening area of ​​the plurality of hydrogen outlet grooves in the inner ring of the first guide ring is S 5 mm 2 , where 0.005≤S 5 / S 4 ≤0.05.

[0028] In some embodiments, the electrolysis unit also includes a titanium filter, which is located inside the inner circle of the second drainage ring, the outer circle of the titanium filter is close to the inner circle of the second drainage ring, and the end of the water inlet trough away from the water inlet is opposite to the outer circle of the titanium filter, and the titanium filter is arranged on the side of the titanium sheet on the side of the membrane electrode close to the second drainage ring.

[0029] In some embodiments, the first drainage ring and the second drainage ring are both made of ppsu.

[0030] Compared with the prior art, the hydrogen production device according to the embodiment of the present invention has the following beneficial effects:

[0031] In the present invention, since the electrolysis structure is used to prepare high-pressure hydrogen, the inside thereof is in a high-pressure environment. In order to ensure the sealing performance, the present invention sleeves an outer sealing component on the outside of the electrolysis unit, allows the elastic sealing ring to be sleeved on the outer periphery of the electrolysis unit, and then allows the support ring to be sleeved on the outer periphery of the elastic sealing ring, and the axial thickness of the elastic sealing ring is greater than the axial thickness of the support ring and the axial thickness of the electrolysis unit. Moreover, both sides of the elastic sealing ring in the axial direction are planes, and the cross-section of the elastic sealing ring is rectangular, so that when the clamping mechanism clamps the electrolysis structure When the elastic sealing ring is squeezed and deformed, and under the action of the support ring clamping the elastic sealing ring, the elastic sealing ring can be pressed against each other with the clamping mechanism, and the elastic sealing ring can also clamp the electrolysis unit, that is, when the positive plate and the negative plate are driven to clamp the electrolysis structure, the positive plate, the negative plate, the support ring and the electrolysis unit jointly compress the elastic sealing ring in the sealed space, thereby forming a tight structure, ensuring the sealing between the clamping mechanism, the external sealing component and the electrolysis unit, ensuring that the hydrogen production device can have sufficient sealing, making it difficult for high-pressure hydrogen to leak, and making the hydrogen production device more stable. When the clamping mechanism clamps the electrolysis structure, the distance between the positive plate and the negative plate can be adjusted by the adjustment component, so that the positive plate and the negative plate are correspondingly pressed on both sides of the electrolysis structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is an exploded view of the overall structure of an embodiment of the present invention;

[0033] Figure 2 is a three-dimensional diagram of the overall structure of an embodiment of the present invention;

[0034] Figure 3 is a side view of the overall structure of an embodiment of the present invention;

[0035] Figure 4 is a three-dimensional diagram of an electrolytic structure according to an embodiment of the present invention;

[0036] Figure 5 is another three-dimensional diagram of the electrolytic structure of an embodiment of the present invention;

[0037] Figure 6 is an exploded view of the electrolytic structure of an embodiment of the present invention;

[0038] Figure 7is another exploded view of the electrolytic structure of an embodiment of the present invention;

[0039] Figure 8 is a stereoscopic diagram of a first drainage ring according to an embodiment of the present invention;

[0040] Fig. 9 yes Figure 8 A in the enlarged view;

[0041] Fig.10 is a stereoscopic diagram of a second drainage ring according to an embodiment of the present invention;

[0042] Fig.11 yes Fig.10 The enlarged view of point B in the figure;

[0043] Fig.12 yes Fig.10 The enlarged view of point C in the figure;

[0044] Fig.13 is a cross-sectional view of an electrolytic structure according to an embodiment of the present invention;

[0045] Fig.14 yes Fig.13 The enlarged view of D in the figure;

[0046] Fig.15 is a schematic diagram of a positioning ring according to an embodiment of the present invention;

[0047] Fig.16 is a cross-sectional view of multiple electrolytic structures according to an embodiment of the present invention;

[0048] Fig.17 yes Fig.16 Enlarged view of point E in FIG.

[0049] In the figure, 100, hydrogen outlet channel; 101, hydrogen outlet; 200, water inlet channel; 201, water inlet; 300, water return channel; 301, water return outlet;

[0050] 1. Electrolysis unit; 11. Membrane electrode; 12. Titanium sheet; 13. First drainage ring; 131. Hydrogen outlet slot; 132. First sealing slot; 14. Second drainage ring; 141. Water inlet slot; 142. Water return slot; 143. Second sealing slot; 15. Middle sealing ring; 16. End sealing ring; 17. Titanium filter; 18. Gap;

[0051] 2. External sealing assembly; 21. Support ring; 22. Elastic sealing ring; 23. Support sealing pad;

[0052] 3. Clamping mechanism; 31. Positive electrode pressure plate; 32. Negative electrode pressure plate; 33. Positive electrode plate; 34. Negative electrode plate; 35. Adjustment assembly; 351. Bolt; 352. Nut; 36. Titanium plate; 37. Positioning ring; 371. Positioning groove; 38. First sealing ring; 39. Second sealing ring;

[0053] 4. Sealing plate; 5. Water inlet joint; 6. Water return joint; 7. Hydrogen outlet joint; 8. Sealed space. DETAILED DESCRIPTION

[0054] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0055] In the description of the present invention, it should be understood that the wording "comprising" used in the present specification refers to the presence of the features, integers, steps, operations, parts / components and / or assemblies, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts / components, assemblies and / or their groups. It should be understood that when we say a part / component is "connected" to another part / component, it can be directly connected to the other part / component, or there can be intermediate parts / components. The wording "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0056] like Figures 1 to 17 As shown, the present invention relates to a hydrogen production device, comprising: an electrolysis structure and a clamping mechanism 3, wherein the clamping mechanism 3 is used to clamp the electrolysis structure.

[0057] The clamping mechanism 3 includes a positive electrode pressure plate 31, a negative electrode pressure plate 32, a positive electrode plate 33, a negative electrode plate 34 and an adjusting component 35. The positive electrode pressure plate 31 and the negative electrode pressure plate 32 are opposite to each other. The positive electrode plate 33 and the negative electrode plate 34 are correspondingly padded on both sides of the positive electrode pressure plate 31 and the negative electrode pressure plate 32 that are opposite to each other. The electrolysis structure is clamped between the positive electrode plate 33 and the negative electrode plate 34. The adjusting component 35 is connected between the positive electrode pressure plate 31 and the negative electrode pressure plate 32 to adjust the distance between the positive electrode pressure plate 31 and the negative electrode pressure plate 32. The side of the positive electrode pressure plate 31 facing away from the negative electrode pressure plate 32 is provided with a water inlet interface, a water return interface and a hydrogen outlet interface connected to the electrolysis structure.

[0058] The electrolysis structure includes an electrolysis unit 1 and an outer sealing component 2, the outer sealing component 2 includes a support ring 21 and an elastic sealing ring 22, the support ring 21 is sleeved outside the electrolysis unit 1, a sealed space is formed between the support ring 21, the electrolysis unit 1, the positive plate 33 and the negative plate 34, the elastic sealing ring 22 is arranged in the sealed space and sleeved on the outer periphery of the electrolysis unit 1, the thickness of the elastic sealing ring 22 in the direction from the positive plate 33 to the negative plate 34 is greater than the thickness of the support ring 21 in the direction from the positive plate 33 to the negative plate 34, and is also greater than the thickness of the electrolysis unit 1 in the direction from the positive plate 33 to the negative plate 34, the cross-section of the elastic sealing ring 22 is rectangular, and the water inlet interface, the water return interface and the hydrogen outlet interface of the positive plate 31 are all connected to the electrolysis unit 1.

[0059] In the present invention, the electrolysis structure is used to prepare high-pressure hydrogen, so the inside thereof is in a high-pressure environment. In order to ensure the sealing performance, the present invention sleeves an outer sealing component 2 on the outside of the electrolysis unit 1, and allows the elastic sealing ring 22 to be sleeved on the outer periphery of the electrolysis unit 1, and then allows the support ring 21 to be sleeved on the outer periphery of the elastic sealing ring 22, and the axial thickness of the elastic sealing ring 22 is greater than the axial thickness of the support ring 21 and the axial thickness of the electrolysis unit 1. Moreover, both sides of the elastic sealing ring 22 in the axial direction are planes, and the cross-section of the elastic sealing ring 22 is rectangular, so that when the clamping mechanism 3 clamps the electrolysis structure, the elastic sealing ring 22 is The sealing ring 22 is deformed by being squeezed, and under the action of the support ring 21 clamping the elastic sealing ring 22, the elastic sealing ring 22 can be pressed against each other with the clamping mechanism 3, and the elastic sealing ring 22 can also clamp the electrolysis unit 1, that is, when driving the positive plate 33 and the negative plate 34 to clamp the electrolysis structure, the positive plate 33, the negative plate 34, the support ring 21 and the electrolysis unit 1 together compress the elastic sealing ring 22 in the sealed space, so as to form a tight structure, ensure the sealing between the clamping mechanism 3, the external sealing component 2 and the electrolysis unit 1, ensure that the hydrogen production device can have sufficient sealing, make the high-pressure hydrogen less likely to leak, and make the hydrogen production device more stable. When the clamping mechanism 3 clamps the electrolysis structure, the distance between the positive plate 31 and the negative plate 32 can be adjusted by the adjustment component 35, so that the positive plate 33 and the negative plate 34 are pressed against the two sides of the electrolysis structure.

[0060] In this embodiment, the electrolysis unit 1 includes a membrane electrode 11, a titanium sheet 12, a first drainage ring 13 and a second drainage ring 14. The first drainage ring 13, the membrane electrode 11 and the second drainage ring 14 are stacked together in sequence. The membrane electrode 11 is circular. The outer diameter of the first drainage ring 13 and the outer diameter of the second drainage ring 14 are both larger than the outer diameter of the membrane electrode 11. The first drainage ring 13 and the second drainage ring 14 clamp the outer periphery of the membrane electrode 11. The first drainage ring 13 A hydrogen outlet channel 100 connected to one side of the membrane electrode 11 is opened on the top, and a water inlet channel 200 and a water return channel 300 connected to the other side of the membrane electrode 11 are opened on the second drainage ring 14. Two titanium sheets 12 are provided, and the two titanium sheets 12 are correspondingly connected to the two sides of the membrane electrode 11. The water inlet interface, the water return interface and the hydrogen outlet interface of the positive electrode pressure plate 31 are correspondingly connected to the water inlet channel 200, the water return channel 300 and the hydrogen outlet channel 100 of the electrolysis unit 1.

[0061] In the present invention, when the electrolysis unit 1 is working, one of the titanium sheets 12 serves as an anode and the other titanium sheet 12 serves as a cathode. Water flows into the titanium sheet 12 serving as an anode through the water inlet channel 200 of the second drainage ring 14 to electrolyze hydrogen ions. The electrolyzed water can then be discharged through the return water channel 300 of the second drainage ring 14. At the same time, the ionized hydrogen ions can pass through the membrane electrode 11 and reach the titanium sheet 12 serving as a cathode to react and produce high-pressure hydrogen. The high-pressure hydrogen can enter the hydrogen outlet channel 100 of the first drainage ring 13 to facilitate the collection of the high-pressure hydrogen and complete the preparation of the high-pressure hydrogen.

[0062] Furthermore, since the membrane electrode 11 is clamped between the first drainage ring 13 and the second drainage ring 14, and the outer diameter of the first drainage ring 13 and the outer diameter of the second drainage ring 14 are both larger than the outer diameter of the membrane electrode 11, the first drainage ring 13 and the second drainage ring 14 clamp the outer periphery of the membrane electrode 11, and there will be a gap between the areas of the first drainage ring 13 and the second drainage ring 14 close to the outer circle. Therefore, when the clamping mechanism 3 clamps the electrolysis structure, the inner periphery of the elastic sealing ring 22 will squeeze into the gap between the areas of the first drainage ring 13 and the second drainage ring 14 close to the outer circle, which can strengthen the sealing between the first drainage ring 13 and the second drainage ring 14 and further prevent the leakage of high-pressure hydrogen.

[0063] In addition, since the titanium sheet 12 has a high flatness, after the titanium sheet 12 is attached to the side of the membrane electrode 11, it can fit tightly to the side of the membrane electrode 11, thereby providing good support for the membrane electrode 11 and ensuring the stability of the electrolysis structure.

[0064] In this embodiment, the outer sealing component 2 further includes a supporting sealing gasket 23 , and the supporting ring 21 is a stainless steel supporting ring 21 , and the supporting sealing gaskets 23 are attached to both sides of the supporting ring 21 in the axial direction.

[0065] Specifically, the support seal 23 is made of Teflon. On the one hand, the support seal 23 is attached to both sides of the support ring 21, so that after the clamping mechanism 3 clamps the electrolytic structure, the support seal 23 is tightly attached to the clamping mechanism 3, which can further improve the sealing effect. Therefore, the electrolytic structure is tightly attached to the clamping mechanism 3 through the elastic seal 22, and is tightly attached to the clamping mechanism 3 through the support seal 23, so that a double sealing effect is achieved, and the sealing of the electrolytic structure is ensured. On the second hand, since the support ring 21 is made of stainless steel, the elastic seal 22 is clamped with sufficient strength, and then the support seal 23 is attached to both sides of the stainless steel support ring 21, so that the flatness requirements of the planes on both sides of the support ring 21 do not need to be too high, and the sealing can be ensured, and the processing difficulty and processing accuracy of the support ring 21 can be reduced. On the third hand, Teflon has high chemical stability and can withstand high temperatures, so that the support seal 23 can have a long service life and high practicality.

[0066] In this embodiment, the clamping mechanism 3 clamps the electrolysis structure so that when the elastic sealing ring 22 is squeezed, the inner periphery of the elastic sealing ring 22 is tightly wrapped around the outer periphery of the first drainage ring 13 and the second drainage ring 14, and a portion of the inner periphery of the elastic sealing ring 22 is squeezed into between the first drainage ring 13 and the second drainage ring 14, thereby strengthening the sealing between the first drainage ring 13 and the second drainage ring 14.

[0067] In this embodiment, the elastic sealing ring 22 is a rubber elastic sealing ring 22, so as to ensure the sealing performance of the electrolysis structure.

[0068] In this embodiment, the electrolysis unit 1 also includes an intermediate sealing ring 15, which is sandwiched between the first drainage ring 13 and the second drainage ring 14, and the membrane electrode 11 is sandwiched between the first drainage ring 13 and the intermediate sealing ring 15, or the membrane electrode 11 is sandwiched between the second drainage ring 14 and the intermediate sealing ring 15.

[0069] The middle sealing ring 15 is sandwiched between the first drain ring 13 and the second drain ring 14. The middle sealing ring 15 is made of Teflon. Since Teflon has high chemical stability and high temperature resistance, the sealing between the first drain ring 13 and the second drain ring 14 can be ensured, and the life of the electrolysis structure is longer. Then, the edge of the membrane electrode 11 is sandwiched between the first drain ring 13 and the middle sealing ring 15, or the edge of the membrane electrode 11 is sandwiched between the second drain ring 14 and the middle sealing ring 15, so that the membrane electrode 11 blocks the inner rings of the first drain ring 13 and the second drain ring 14, so as to limit water from passing through the inner ring of the second drain ring 14 to the inner ring of the first drain ring 13, and only allow hydrogen ions to pass through the membrane electrode 11 to the titanium sheet 12 as the cathode.

[0070] Preferably, the electrolysis unit 1 further comprises an end sealing ring 16 , and the end sealing ring 16 is attached to both sides of the first drainage ring 13 and the second drainage ring 14 facing away from each other.

[0071] The first drainage ring 13 and the second drainage ring 14 are both provided with the end sealing ring 16 on both sides facing away from each other. The end sealing ring 16 is made of Teflon. Since Teflon has high chemical stability and high temperature resistance, after the clamping mechanism 3 clamps the electrolytic structure, the sealing between the electrolytic structure and the clamping mechanism 3 can be ensured, and the service life of the electrolytic structure is longer. Moreover, when one of the end sealing rings 16 is attached to the side of the first drainage ring 13 facing away from the second drainage ring 14, the end sealing ring 16 can also cover the hydrogen outlet groove 131 of the first drainage ring 13 and seal the hydrogen outlet groove 131. When the other end sealing ring 16 is attached to the side of the second drainage ring 14 facing away from the first drainage ring 13, the end sealing ring 16 can also cover the water inlet groove 141 and the water return groove 142 of the second drainage ring 14 and seal the water inlet groove 141 and the water return groove 142.

[0072] In this embodiment, the first drainage ring 13 is provided with first sealing grooves 132 along the circumferential direction on both sides in the axial direction, and the second drainage ring 14 is provided with second sealing grooves 143 along the circumferential direction on both sides in the axial direction. After the clamping mechanism 3 clamps the electrolysis structure, the corresponding parts of the intermediate sealing ring 15 on both sides in the axial direction are pressed into the first sealing groove 132 and the second sealing groove 143, and a part of one of the end sealing rings 16 is pressed into the first sealing groove 132 of the first drainage ring 13, and a part of the other end sealing ring 16 is pressed into the second sealing groove 143 of the second drainage ring 14.

[0073] That is, by correspondingly opening the first sealing groove 132 and the second sealing groove 143 on the first drainage ring 13 and the second drainage ring 14, when the clamping mechanism 3 clamps the electrolysis structure, the corresponding parts on both sides of the intermediate sealing ring 15 are pressed into the first sealing groove 132 of the first drainage ring 13 and the second sealing groove 143 of the second drainage ring 14, which is conducive to strengthening the sealing between the first drainage ring 13 and the second drainage ring 14. At the same time, part of one of the end sealing rings 16 is pressed into the first sealing groove 132 of the first drainage ring 13, and part of the other end sealing ring 16 is pressed into the second sealing groove 143 of the second drainage ring 14, which can strengthen the sealing between the first drainage ring 13 and one of the end sealing rings 16, so that hydrogen will not leak, and also strengthen the sealing between the second drainage ring 14 and the other end sealing ring 16, so that water will not leak.

[0074] In this embodiment, the first guide ring 13 is provided with a hydrogen outlet 101 along the axial direction, and the first guide ring 13 is provided with a hydrogen outlet groove 131 on the side facing away from the second guide ring 14, one end of the hydrogen outlet groove 131 is connected to the hydrogen outlet 101, and the other end of the hydrogen outlet groove 131 passes through the inner circle of the first guide ring 13, and the hydrogen outlet 101 and the hydrogen outlet groove 131 form the hydrogen outlet channel 100.

[0075] The second drainage ring 14 is axially provided with a water inlet 201 and a water return port 301, and the second drainage ring 14 is provided with a water inlet groove 141 and a water return groove 142 on the side facing away from the first drainage ring 13, one end of the water inlet groove 141 is connected with the water inlet 201, and the other end of the water inlet groove 141 passes through the inner circle of the second drainage ring 14, one end of the water return groove 142 is connected with the water return port 301, and the other end of the water return groove 142 passes through the inner circle of the second drainage ring 14, the water inlet 201 and the water inlet groove 141 form the water inlet channel 200, and the water return port 301 and the water return groove 142 form the water return channel 300.

[0076] Specifically, the first drainage ring 13, the second drainage ring 14, the middle sealing ring 15 and the end sealing ring 16 are all provided with the water inlet 201, the water return port 301 and the hydrogen outlet 101, a plurality of the water inlets 201 are connected together, a plurality of the water return ports 301 are connected together, and a plurality of the hydrogen outlets 101 are connected together. By providing the water inlet 201, the water return port 301 and the hydrogen outlet 101 on the first drainage ring 13, the second drainage ring 14, the middle sealing ring 15 and the end sealing ring 16, a plurality of electrolysis structures can be stacked. After water is injected into the water inlet 201 of the outermost electrolysis structure, the water can flow into the plurality of electrolysis structures along the plurality of water inlets 201. Moreover, due to the arrangement of the middle sealing ring 15 and the end sealing ring 16, water can only enter the inner circle of the second drainage ring 14 through the water inlet groove 141. After electrolysis, the water enters the plurality of water return ports 301 through the water return groove 142. Then, after the hydrogen ions at the titanium sheet 12 serving as the cathode react to generate hydrogen, the hydrogen can enter the hydrogen outlet 101 along the hydrogen outlet groove 131. This facilitates the simultaneous water supply, water recovery and hydrogen collection of the plurality of electrolysis structures. It is convenient for users to stack the electrolysis structures according to their needs, and the practicability is high.

[0077] In this embodiment, a plurality of water inlet grooves 141 are provided on the side of the second drainage ring 14 facing away from the first drainage ring 13 , one end of the plurality of water inlet grooves 141 is connected to the water inlet 201 of the second drainage ring 14 , and the other end of the plurality of water inlet grooves 141 radially extends to the inner circle of the second drainage ring 14 .

[0078] There are multiple water inlet grooves 141, one end of each of the multiple water inlet grooves 141 is connected to the water inlet 201 of the second drainage ring 14, and the other end of each of the multiple water inlet grooves 141 extends radially to the inner circle of the second drainage ring 14. Therefore, on the one hand, water can be quickly injected into the titanium sheet 12 serving as the anode through the multiple water inlet grooves 141, which is beneficial to speed up the water injection efficiency and improve the electrolysis efficiency; on the other hand, the multiple water inlet grooves 141 extend radially to the inner circle of the second drainage ring 14, so that water can more quickly and evenly soak the titanium sheet 12 serving as the anode. Moreover, since the electrolysis structure is in a high-pressure environment, the multiple water inlet grooves 141 are extended radially, so that the openings of the multiple water inlet grooves 141 located in the inner circle of the second drainage ring 14 can maintain a sufficient distance from each other, and the structural strength of the second drainage ring 14 is not easily affected by the setting of the multiple water inlet grooves 141, so that the second drainage ring 14 can still maintain sufficient structural strength under a high-pressure environment, thereby ensuring the stability of the electrolysis structure.

[0079] Preferably, the thickness of the second guide ring 14 in the axial direction is T 1 mm, the depth of the water inlet groove 141 in the axial direction of the second drainage ring 14 is D 1 mm, where 0.2≤D 1 / T 1 ≤0.7.D 1 / T 1 The value of can be 0.2, 0.3, 0.4, 0.5, 0.6 or 0.7.

[0080] In D 1 / T 1 When the diameter of the second drainage ring 14 is too large, the thickness of the second drainage ring 14 in the axial direction is small, or the depth of the water inlet groove 141 in the axial direction of the second drainage ring 14 is large, which will cause the structural strength of the second drainage ring 14 to be weakened; 1 / T 1 If the value is too small, the thickness of the second drainage ring 14 is too large, which will cause the volume of the electrolysis structure to be too large, or the depth of the water inlet groove 141 in the axial direction of the second drainage ring 14 is too small, which will affect the efficiency of water injection into the titanium sheet 12 and the hydrogen production efficiency. Therefore, keep 0.2≤D 1 / T 1 ≤0.7, thereby ensuring the hydrogen production efficiency of the electrolysis structure and ensuring that the electrolysis structure has sufficient strength.

[0081] Furthermore, the surface area of ​​the inner circumference of the inner ring of the second guide ring 14 is S 1 mm 2 The total opening area of ​​the plurality of water inlet grooves 141 in the inner ring of the second drainage ring 14 is S 2 mm 2 , where 0.005≤S 2 / S 1 ≤0.03.S 2 / S 1 The value of can be 0.008, 0.01, 0.015, 0.02, 0.025 or 0.028.

[0082] Since the second drainage ring 14 is weaker at the position where the water inlet groove 141 is opened, the more the water inlet groove 141 occupies the position of the second drainage ring 14, the weaker the structural strength of the second drainage ring 14 will be. 2 / S 1 When the flow rate is larger, the water inlet groove 141 occupies more space of the second drainage ring 14, which will affect the structural strength of the second drainage ring 14. 2 / S 1When the water inlet groove 141 is smaller, the position of the second drainage ring 14 is less, and although the structural strength of the second drainage ring 14 can be ensured, the efficiency of water injection into the titanium sheet 12 will be affected. Therefore, 0.005≤S 2 / S 1 ≤0.03, thereby ensuring the structural strength of the second guide ring 14, as well as the water injection efficiency and hydrogen production efficiency.

[0083] In this embodiment, a plurality of return water grooves 142 are provided on the side of the second drainage ring 14 facing away from the first drainage ring 13 , one end of the plurality of return water grooves 142 is connected to the return water port 301 of the second drainage ring 14 , and the other end of the plurality of return water grooves 142 radially extends to the inner circle of the second drainage ring 14 .

[0084] There are multiple return water grooves 142, one end of each of the return water grooves 142 is connected to the return water port 301 of the second drainage ring 14, and the other end of each of the return water grooves 142 extends radially to the inner circle of the second drainage ring 14. Therefore, on the one hand, water can quickly flow from the titanium sheet 12 serving as the anode to the return water port 301 through the multiple return water grooves 142, which is beneficial to speeding up the water recovery efficiency and will not affect the electrolysis efficiency; on the other hand, since the interior of the electrolysis structure is a high-pressure environment, extending the multiple return water grooves 142 radially can allow the openings of the multiple return water grooves 142 located in the inner circle of the second drainage ring 14 to maintain a sufficient distance from each other, and it is not easy for the setting of the multiple return water grooves 142 to affect the structural strength of the second drainage ring 14, so that the second drainage ring 14 can still maintain sufficient structural strength under high-pressure environment, thereby ensuring the stability of the electrolysis structure.

[0085] Preferably, the thickness of the second guide ring 14 in the axial direction is T 1 mm, the depth of the return groove 142 in the axial direction of the second drainage ring 14 is D 2 mm, where 0.2≤D 2 / T 1 ≤0.7.D 2 / T 1 The value of can be 0.2, 0.3, 0.4, 0.5, 0.6 or 0.7.

[0086] In D 2 / T 1 When the diameter of the second drainage ring 14 is too large, the thickness of the second drainage ring 14 in the axial direction is small, or the depth of the return groove 142 in the axial direction of the second drainage ring 14 is large, which will cause the structural strength of the second drainage ring 14 to be weakened; 2 / T 1If the thickness of the second drainage ring 14 is too large, the volume of the electrolysis structure will be too large, or the depth of the return groove 142 in the axial direction of the second drainage ring 14 is too small, which will affect the efficiency of water exiting the titanium sheet 12 and the electrolysis efficiency. Therefore, keep 0.2≤D 2 / T 1 ≤0.7, thereby ensuring the hydrogen production efficiency of the electrolysis structure and ensuring that the electrolysis structure has sufficient structural strength.

[0087] Furthermore, the surface area of ​​the inner circumference of the inner ring of the second guide ring 14 is S 1 mm 2 The total opening area of ​​the plurality of return water grooves 142 in the inner ring of the second drainage ring 14 is S 3 mm 2 , where 0.005≤S 3 / S 1 ≤0.03.S 3 / S 1 The value of can be 0.005, 0.008, 0.01, 0.015, 0.02, 0.025, 0.028 or 0.03.

[0088] Since the second drainage ring 14 is weaker at the position where the return groove 142 is opened, the more the return groove 142 occupies the position of the second drainage ring 14, the weaker the structural strength of the second drainage ring 14 will be. 3 / S 1 When the flow rate is larger, the return groove 142 occupies more space of the second drainage ring 14, which will affect the structural strength of the second drainage ring 14. 3 / S 1 When the return water groove 142 is smaller, the position of the second drainage ring 14 is less, and although the structural strength of the second drainage ring 14 can be ensured, the efficiency of water exiting the titanium sheet 12 will be affected. Therefore, 0.005≤S 3 / S 1 ≤0.03, thereby ensuring the structural strength of the second guide ring 14 and the hydrogen production efficiency.

[0089] In this embodiment, a plurality of hydrogen outlet grooves 131 are provided on a side of the first guide ring 13 facing away from the second guide ring 14 , one end of the plurality of hydrogen outlet grooves 131 is connected to the hydrogen outlet port 101 of the first guide ring 13 , and the other end of the plurality of hydrogen outlet grooves 131 radially extends to the inner circle of the first guide ring 13 .

[0090] There are multiple hydrogen outlet grooves 131, one end of each of the multiple hydrogen outlet grooves 131 is connected to the hydrogen outlet port 101 of the first guide ring 13, and the other end of each of the multiple hydrogen outlet grooves 131 extends radially to the inner circle of the first guide ring 13. Therefore, on the one hand, the hydrogen produced by the reaction at the titanium sheet 12 serving as the cathode can quickly enter the hydrogen outlet port 101 through the multiple hydrogen outlet grooves 131; on the other hand, the multiple hydrogen outlet grooves 131 extend radially to the inner circle of the first guide ring 13, so that hydrogen can be collected faster. Moreover, since the inside of the electrolysis structure is a high-pressure environment, the multiple hydrogen outlet grooves 131 are extended radially, so that the openings of the multiple hydrogen outlet grooves 131 located in the inner circle of the first guide ring 13 can maintain a sufficient distance from each other, and the structural strength of the first guide ring 13 is not easily affected by the setting of the multiple hydrogen outlet grooves 131, so that the first guide ring 13 can still maintain sufficient structural strength under a high-pressure environment, thereby ensuring the stability of the electrolysis structure.

[0091] Preferably, the thickness of the first guide ring 13 in the axial direction is T 2 mm, the depth of the hydrogen outlet groove 131 in the axial direction of the first guide ring 13 is D 3 mm, where 0.2≤D 3 / T 2 ≤0.7.D 3 / T 2 The value of can be 0.2, 0.3, 0.4, 0.5, 0.6 or 0.7.

[0092] In D 3 / T 2 When the diameter of the first guide ring 13 is too large, the thickness of the first guide ring 13 in the axial direction is small, or the depth of the hydrogen outlet groove 131 in the axial direction of the first guide ring 13 is large, which will cause the structural strength of the first guide ring 13 to be weakened; 3 / T 2 If the thickness of the first guide ring 13 is too large, the volume of the electrolysis structure will be too large, or the depth of the hydrogen outlet groove 131 in the axial direction of the first guide ring 13 is too small, which will affect the recovery efficiency of hydrogen. Therefore, keep 0.2≤D 3 / T 2 ≤0.7, thereby ensuring the efficiency of the electrolysis structure in collecting hydrogen and ensuring that the electrolysis structure has sufficient structural strength.

[0093] Furthermore, the surface area of ​​the inner ring of the first guide ring 13 is S 4 mm 2 The total opening area of ​​the plurality of hydrogen outlet grooves 131 in the inner ring of the first guide ring 13 is S 5 mm 2 , where 0.005≤S5 / S 4 ≤0.05.S 5 / S 4 The value of can be 0.005, 0.008, 0.01, 0.015, 0.02, 0.025, 0.03, 0.035, 0.04, 0.045 or 0.05.

[0094] Since the first guide ring 13 is weaker at the position where the hydrogen outlet groove 131 is opened, the more the hydrogen outlet groove 131 occupies the position of the first guide ring 13, the weaker the structural strength of the first guide ring 13 will be. 5 / S 4 When the hydrogen outlet groove 131 is larger, the hydrogen outlet groove 131 occupies more space of the first guide ring 13, which will affect the structural strength of the first guide ring 13. 5 / S 4 When the S is smaller, the hydrogen outlet groove 131 occupies less space in the first guide ring 13. Although the structural strength of the first guide ring 13 can be ensured, the efficiency of hydrogen entering the hydrogen outlet 101 will be affected. Therefore, 0.005≤S 5 / S 4 ≤0.05, thereby ensuring the structural strength of the first guide ring 13 and the collection efficiency of hydrogen.

[0095] In addition, in the present invention, the axial thickness T of the second guide ring 14 is 1 Greater than the axial thickness T of the first guide ring 13 2 , because water will pass through the water inlet 201 to the water inlet groove 141 of the second drainage ring 14, and enter the second drainage ring 14, that is, the second drainage ring 14 will also be impacted by water, and the second drainage ring 14 is provided with the water inlet groove 141 and the water return groove 142, so the structural strength of the second drainage ring 14 is affected to a certain extent, however, the first drainage ring 13 is only provided with the hydrogen outlet groove 131, so the structural strength of the first drainage ring 13 is less affected. Therefore, considering that the size of the electrolysis structure in the axial direction will not be too large, the thickness T of the second drainage ring 14 in the axial direction is set to 1 Greater than the axial thickness T of the first guide ring 13 2 , thereby ensuring the overall stability of the electrolysis structure and preventing the electrolysis structure from being too large in the axial direction.

[0096] In this embodiment, the water inlet 201 and the water return port 301 of the second drainage ring 14 are evenly distributed along the circumference of the second drainage ring 14, and the end of the water inlet groove 141 away from the water inlet 201 and the end of the water return groove 142 away from the water return port 301 are relatively arranged.

[0097] Since the water in the water inlet 201 enters the inner circle of the second drainage ring 14 through the water inlet groove 141 of the second drainage ring 14, the water can enter the water return port 301 through the water return groove 142 of the second drainage ring 14 after passing through the titanium sheet 12, so the water inlet 201 and the water return port 301 of the second drainage ring 14 are evenly arranged along the circumference of the second drainage ring 14, so that the water can better and evenly wet the entire surface of the titanium sheet 12, which is conducive to improving the efficiency of electrolysis, and can also prevent the titanium sheet 12 from ablating the membrane electrode 11 or other components. Moreover, the end of the water inlet groove 141 away from the water inlet 201 and the end of the water return groove 142 away from the water return port 301 are arranged relative to each other, which is conducive to smoother entry and exit of water and ensures the amount of electrolyte.

[0098] In this embodiment, the electrolysis unit 1 also includes a titanium filter 17, which is located in the inner circle of the second drainage ring 14, and the outer circle of the titanium filter 17 is close to the inner circle of the second drainage ring 14, and the end of the water inlet groove 141 away from the water inlet 201 is opposite to the outer circle of the titanium filter 17, and the titanium filter 17 is attached to the side of the titanium sheet 12 of the membrane electrode 11 close to the second drainage ring 14.

[0099] By allowing the titanium filter 17 to be attached to the side of the titanium sheet 12 on the side of the membrane electrode 11 close to the second drainage ring 14, that is, the titanium filter 17 can be attached to the side of the titanium sheet 12 serving as the anode. On the one hand, the titanium filter 17 can play a filtering role to prevent foreign matter from entering the titanium sheet 12 and the membrane electrode 11 and affecting the electrolysis of water; on the other hand, the titanium filter 17 is a mesh structure, so under the capillary action of the titanium filter 17, water enters the titanium filter After the titanium filter 17 is connected, water can be guided to quickly and evenly penetrate the surface of the titanium filter 17, so that water can flow more quickly and evenly to the surface of the titanium sheet 12 as the anode, which is conducive to accelerating the electrolysis efficiency and improving the hydrogen production efficiency. Moreover, since the titanium sheet 12 will quickly generate heat after being energized, the setting of the titanium filter 17 can help water to quickly cover the entire surface of the titanium sheet 12, and prevent the part of the titanium sheet 12 that is not wetted by water from overheating and eventually ablating the membrane electrode 11 or other components. At the same time, since the titanium filter 17 has high mechanical strength and toughness, it can withstand greater pressure and mechanical impact without being easily deformed or damaged. Compared with other metal filters, the titanium filter 17 can maintain long-term stability under high pressure or harsh working environment, which is conducive to improving the service life of the electrolysis structure.

[0100] In this embodiment, the first drainage ring 13 and the second drainage ring 14 are both made of ppsu.

[0101] PPSU (polyphenylsulfone) is a high-performance engineering plastic with the advantages of high temperature resistance, chemical corrosion resistance, and good mechanical properties. It can have a long service life in electrolytic hydrogen production technology, thereby improving the service life of the electrolytic structure.

[0102] In this embodiment, the electrolytic structure is provided in plurality, and the plurality of electrolytic structures are stacked in sequence, and a titanium plate 36 is provided between two adjacent electrolytic structures; and in the electrolytic structure adjacent to the positive plate 33, the support ring 21, the electrolytic unit 1 cooperate with the positive plate 33 and the titanium plate 36 to form the sealed space; in the electrolytic structure adjacent to the negative plate 34, the support ring 21 and the electrolytic unit 1 cooperate with the negative plate 34 and the titanium plate 36 to form the sealed space; in other electrolytic structures, the support ring 21 and the electrolytic unit 1 form the sealed space with two adjacent titanium plates 36. In two adjacent electrolytic structures, the titanium filter 17 of one electrolytic structure and the titanium sheet 12 of the other electrolytic structure are correspondingly attached to the two sides of the titanium plate 36.

[0103] Specifically, the titanium junction 12 serving as the cathode in the electrolysis structure close to the negative plate 34 contacts the negative plate 34, and the titanium filter 17 in the electrolysis structure close to the positive plate 33 contacts the positive plate 33. Then, in two adjacent electrolysis structures, the titanium filter 17 of one electrolysis structure and the titanium junction 12 of the other electrolysis structure are correspondingly attached to the two sides of the titanium plate 36, so that when the positive plate 33 and the negative plate 34 are energized, multiple electrolysis structures are also energized.

[0104] In this embodiment, it also includes a plurality of positioning rings 37, and the plurality of positioning rings 37 are arranged one by one on the side of the plurality of electrolytic structures close to the positive electrode pressure plate 31, the inner diameter of the positioning ring 37 is greater than or equal to the outer diameter of the electrolytic unit 1, and a positioning groove 371 is circumferentially opened on the side of the positioning ring 37 close to the electrolytic structure, and a portion of the elastic sealing ring 22 enters the positioning groove 371.

[0105] Specifically, a positioning ring 37 is provided between two adjacent electrolytic structures. When the positioning ring 37 is located between the two adjacent electrolytic structures, the positioning ring 37 is located between the electrolytic structure and the titanium plate 36, and a first sealing ring 38 is provided between the positioning ring 37 and the titanium plate 36, and the first sealing ring 38 is made of Teflon; a positioning ring 37 is also provided between the electrolytic structure close to the positive plate 33 and the positive plate 33, and a second sealing ring 39 is provided between the positioning ring 37 and the positive plate 33, and the second sealing ring 39 is made of Teflon.

[0106] In this embodiment, a sealing plate 4 is provided between the positive electrode pressure plate 31 and the positive electrode plate 33, and a sealing plate 4 is provided between the negative electrode pressure plate 32 and the negative electrode plate 34. The sealing plate 4 is made of Teflon to allow the positive electrode pressure plate 31 and the positive electrode plate 33 to have a higher sealing performance after being attached, and to allow the negative electrode pressure plate 32 and the negative electrode plate 34 to have a higher sealing performance after being attached.

[0107] It should be noted that the titanium plate 36, the positive plate 33 and the positive pressure plate 31 are also provided with a water inlet 201, a water return port 301 and a hydrogen outlet 101, and the titanium plate 36, the positive plate 33, the positive pressure plate 31 and the water inlet 201, the water return port 301 and the hydrogen outlet 101 of the electrolysis unit 1 are correspondingly connected, and the positive pressure plate 31 is provided with a water inlet interface, a water return interface and a hydrogen outlet interface correspondingly connected to the water inlet 201, the water return port 301 and the hydrogen outlet 101 of the electrolysis unit 1 on the side facing away from the negative pressure plate 32, and the water inlet interface, the water return interface and the hydrogen outlet interface are correspondingly installed with a water inlet joint 5, a water return joint 6 and a hydrogen outlet joint 7, so that the hydrogen production device can transport and recycle water at the positive pressure plate 31, and can also collect hydrogen.

[0108] In this embodiment, there are multiple adjustment components 35, and the multiple adjustment components 35 are evenly distributed along the circumference of the positive electrode pressure plate 31. The adjustment component 35 can be a combination of a bolt 351 and a nut 352. The bolt 351 passes through the negative electrode pressure plate 32 and the positive electrode pressure plate 31 in sequence. The nut 352 is threadedly connected to the bolt 351, and the nut 352 is pressed against the side of the positive electrode pressure plate 31 facing away from the negative electrode pressure plate 32, so that the positive electrode pressure plate 31 and the negative electrode pressure plate 32 can clamp the electrolytic structure when the nut 352 is tightened.

[0109] 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 substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A hydrogen production device, characterized in that: include: An electrolysis structure and a clamping mechanism, wherein the clamping mechanism is used to clamp the electrolysis structure; The clamping mechanism comprises a positive pressure plate, a negative pressure plate, a positive plate, a negative plate and an adjusting component, the positive pressure plate and the negative pressure plate are opposite to each other, the positive plate and the negative plate are correspondingly padded on both sides of the positive pressure plate and the negative pressure plate opposite to each other, the electrolysis structure is clamped between the positive plate and the negative plate, the adjusting component is connected between the positive pressure plate and the negative pressure plate to adjust the distance between the positive pressure plate and the negative pressure plate, and a water inlet interface, a water return interface and a hydrogen outlet interface are provided on the side of the positive pressure plate facing away from the negative pressure plate; The electrolysis structure includes an electrolysis unit and an external sealing component, the external sealing component includes a support ring and an elastic sealing ring, the support ring is sleeved outside the electrolysis unit, a sealed space is formed between the support ring, the electrolysis unit, the positive plate and the negative plate, the elastic sealing ring is arranged in the sealed space and sleeved on the outer periphery of the electrolysis unit, the thickness of the elastic sealing ring in the direction from the positive plate to the negative plate is greater than the thickness of the support ring in the direction from the positive plate to the negative plate, and is also greater than the thickness of the electrolysis unit in the direction from the positive plate to the negative plate, the cross-section of the elastic sealing ring is rectangular, and the water inlet interface, the water return interface and the hydrogen outlet interface of the positive plate are all connected to the electrolysis unit.

2. The hydrogen production device according to claim 1, characterized in that: The electrolytic structure is provided in plurality, and the plurality of electrolytic structures are stacked in sequence, and a titanium plate is provided between two adjacent electrolytic structures; and in the electrolytic structure adjacent to the positive electrode plate, the support ring, the electrolytic unit, the positive electrode plate, and the titanium plate cooperate to form the sealed space; In the electrolysis structure adjacent to the negative electrode plate, the support ring and the electrolysis unit form the sealed space with the negative electrode plate and the titanium plate; In other electrolysis structures, the support ring and the electrolysis unit form the sealed space with the two adjacent titanium plates.

3. The hydrogen production device according to claim 1 or 2, characterized in that: It also includes a positioning ring, which is arranged on the side of the electrolysis structure close to the positive electrode pressure plate. The side of the positioning ring close to the electrolysis structure is circumferentially provided with a positioning groove, and part of the elastic sealing ring enters the positioning groove.

4. The hydrogen production device according to claim 1, characterized in that: The outer sealing component also includes a supporting sealing pad. The supporting ring is a stainless steel supporting ring. The supporting sealing pads are attached to both sides of the supporting ring.

5. The hydrogen production device according to claim 1, characterized in that: The electrolysis unit includes a membrane electrode, a titanium sheet, a first drainage ring and a second drainage ring, the first drainage ring, the membrane electrode and the second drainage ring are stacked together in sequence, the membrane electrode is circular, the outer diameter of the first drainage ring and the outer diameter of the second drainage ring are both larger than the outer diameter of the membrane electrode, the first drainage ring and the second drainage ring clamp the outer periphery of the membrane electrode, the first drainage ring is provided with a hydrogen outlet channel connected to one side of the membrane electrode, the second drainage ring is provided with a water inlet channel and a water return channel both connected to the other side of the membrane electrode, two titanium sheets are provided, and the two titanium sheets are correspondingly connected to the two sides of the membrane electrode, the water inlet interface, the water return interface and the hydrogen outlet interface of the positive electrode pressure plate are correspondingly connected to the water inlet channel, the water return channel and the hydrogen outlet channel of the electrolysis unit.

6. The hydrogen production device according to claim 5, characterized in that: When the elastic sealing ring is squeezed by the clamping mechanism, the inner periphery of the elastic sealing ring is tightly sleeved around the outer peripheries of the first drainage ring and the second drainage ring, and the inner periphery of the elastic sealing ring is squeezed between the first drainage ring and the second drainage ring.

7. The hydrogen production device according to claim 5, characterized in that: The electrolysis unit also includes a middle sealing ring and an end sealing ring, wherein the middle sealing ring is clamped between the first drainage ring and the second drainage ring, and the membrane electrode is clamped between the first drainage ring and the middle sealing ring, or the membrane electrode is clamped between the second drainage ring and the middle sealing ring, and the end sealing rings are attached to both sides of the first drainage ring and the second drainage ring facing away from each other.

8. The hydrogen production device according to claim 5, characterized in that: The first guide ring is provided with a hydrogen outlet along the axial direction, and a hydrogen outlet groove is provided on a side of the first guide ring facing away from the second guide ring, one end of the hydrogen outlet groove is connected to the hydrogen outlet, and the other end of the hydrogen outlet groove passes through the inner ring of the first guide ring, and the hydrogen outlet and the hydrogen outlet groove form the hydrogen outlet channel; The second drainage ring is axially provided with a water inlet and a water return port, and the second drainage ring is provided with a water inlet groove and a water return groove on the side facing away from the first drainage ring, one end of the water inlet groove is connected with the water inlet, and the other end of the water inlet groove passes through the inner circle of the second drainage ring, one end of the water return groove is connected with the water return port, and the other end of the water return groove passes through the inner circle of the second drainage ring, the water inlet and the water inlet groove form the water inlet channel, and the water return port and the water return groove form the water return channel.

9. The hydrogen production device according to claim 8, characterized in that: A plurality of water inlet grooves are provided on a side of the second drainage ring facing away from the first drainage ring, one end of the plurality of water inlet grooves is connected to the water inlet, and the other end of the plurality of water inlet grooves radially extends to the inner circle of the second drainage ring.

10. The hydrogen production device according to claim 9, characterized in that: The thickness of the second drainage ring in the axial direction is T1 mm, and the depth of the water inlet groove in the axial direction of the second drainage ring is D1 mm, wherein 0.2≤D1 / T1≤0.7; The surface area of ​​the inner ring of the second guide ring is S1mm 2 The total opening area of ​​the plurality of water inlet grooves in the inner ring of the second drainage ring is S2mm 2 , where 0.005≤S2 / S1≤0.

03.

11. The hydrogen production device according to claim 8, characterized in that: A plurality of return water grooves are provided on a side of the second drainage ring facing away from the first drainage ring, one end of the plurality of return water grooves is connected to the return water port, and the other end of the plurality of return water grooves radially extends to the inner circle of the second drainage ring.

12. The hydrogen production device according to claim 11, characterized in that: The thickness of the second drainage ring in the axial direction is T1 mm, and the depth of the water return groove in the axial direction of the second drainage ring is D2 mm, wherein 0.2≤D2 / T1≤0.7; The surface area of ​​the inner ring of the second guide ring is S1mm 2 The total opening area of ​​the plurality of return water grooves in the inner ring of the second drainage ring is S3mm 2 , where 0.005≤S3 / S1≤0.

03.

13. The hydrogen production device according to claim 8, characterized in that: A plurality of hydrogen outlet grooves are provided on a side of the first guide ring facing away from the second guide ring, one end of the plurality of hydrogen outlet grooves is connected to the hydrogen outlet port, and the other end of the plurality of hydrogen outlet grooves radially extends to the inner ring of the first guide ring.

14. The hydrogen production device according to claim 13, characterized in that: The thickness of the first guide ring in the axial direction is T2 mm, and the depth of the hydrogen outlet groove in the axial direction of the first guide ring is D3 mm, wherein 0.2≤D3 / T2≤0.7; The surface area of ​​the inner ring of the first guide ring is S4mm 2 The total opening area of ​​the plurality of hydrogen outlet grooves in the inner ring of the first guide ring is S5mm 2 , where 0.005≤S5 / S4≤0.

05.

15. The hydrogen production device according to claim 8, characterized in that: The electrolysis unit also includes a titanium filter, which is located in the inner circle of the second drainage ring, the outer circle of the titanium filter is close to the inner circle of the second drainage ring, and the end of the water inlet trough away from the water inlet is opposite to the outer circle of the titanium filter, and the titanium filter is arranged on the side of the titanium sheet on the side of the membrane electrode close to the second drainage ring.

16. The hydrogen production device according to claim 5, characterized in that: The first drainage ring and the second drainage ring are both made of ppsu.

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