Electrolytic bath unit piece and alkaline water electrolytic bath

Abstract

The utility model relates to an electrolytic bath unit piece and an alkaline water electrolytic bath and belongs to the technical field of electrolytic baths. According to the sealing gasket, the annular framework is arranged between the first sealing ring and the second sealing ring of the sealing gasket and can well support the sealing gasket, and the problems that the sealing gasket is not attached in place and is excessively compressed and deformed are solved; according to the utility model, the sealing gasket, the annular framework, the bipolar plate and the nickel net are combined together to form the electrolytic cell unit piece, so that the mounting efficiency, the mounting precision and the sealing performance of the electrolytic cell can be effectively improved; the electrolytic cell unit piece provided by the utility model is reasonable in structural design, suitable for a working environment in which the pressure and the temperature are alternately changed for a long time, long in service life and reusable.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic cells, in particular to an electrolytic cell unit component and an alkaline water electrolytic cell. Background Art

[0002] Existing alkaline water electrolytic cells include components such as diaphragms, bipolar plates, and sealing gaskets; an electrolytic cell can be stacked by multiple identical electrolytic units. After the electrolytic units are stacked on each other, they are pressed with screws, and after the pressing is completed, a metal end plate is fixed. The end plate is connected to an electrical system and electrolyte and gas pipelines are introduced.

[0003] As an important sealing component of the electrolytic cell, the sealing gasket is related to the overall life and even safety of the electrolytic cell. The installation of existing alkaline water electrolytic cells is difficult. After installation, heating and pre-tightening are often required. The sealing gasket needs to bear a large pre-tightening force, and the problems of poor fitting and excessive compression deformation are likely to occur in the sealing gasket. Furthermore, in a working environment with alternating pressure and temperature for a long time, the overall sealing performance of the electrolytic cell is poor, liquid and gas leakage are likely to occur, the service life is short, and even the electrolytic cell is damaged; when the electrolytic cell needs to be maintained, disassembled and assembled, existing sealing gaskets often cannot be used again and need to be replaced with new ones. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electrolytic cell unit component and an alkaline water electrolytic cell by overcoming the deficiencies of the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] In the first aspect, an electrolytic cell unit component provided by the utility model includes a sealing gasket, an annular skeleton, and a bipolar plate. The sealing gasket includes a gasket body with an annular structure. The middle part of the gasket body is an annular hole. The gasket body includes a first sealing ring, a second sealing ring, and a connecting part. The first sealing ring and the second sealing ring are connected by the connecting part. The first sealing ring is provided with a first diversion hole, and the second sealing ring is provided with a second diversion hole; the annular skeleton is clamped between the first sealing ring and the second sealing ring. The annular skeleton is provided with a third diversion hole. The first diversion hole, the third diversion hole, and the second diversion hole are sequentially connected to form a diversion channel. The diversion channel is connected to the annular hole through a flow channel groove. Nickel meshes are arranged on two opposite surfaces of the bipolar plate. The bipolar plate is arranged on the sealing gasket.

[0007] As a preferred embodiment of the utility model, the bipolar plate and the annular skeleton are integrally formed.

[0008] As a preferred embodiment of the utility model, the first sealing ring, the connecting part, and the second sealing ring are integrally formed.

[0009] As a preferred embodiment of the present utility model, a groove is provided on a side of the first sealing ring facing away from the second sealing ring. The groove communicates with the annular hole, the groove is adapted to the bipolar plate, and the bipolar plate is received in the groove.

[0010] As a preferred embodiment of the present utility model, an annular boss is provided on a side of the first sealing ring facing away from the second sealing ring. The annular boss is adapted to the second sealing ring.

[0011] As a preferred embodiment of the present utility model, a first convex ring is provided on a side of the first sealing ring facing away from the second sealing ring.

[0012] As a preferred embodiment of the present utility model, a clamping groove is provided on a side of the second sealing ring facing away from the first sealing ring. The clamping groove communicates with the annular hole, and the clamping groove is adapted to the diaphragm.

[0013] As a preferred embodiment of the present utility model, a second convex ring is provided on a side of the second sealing ring facing away from the first sealing ring.

[0014] As a preferred embodiment of the present utility model, the number of the connecting portions is not less than three. The connecting portions are located outside the annular hole, and the connecting portions with the number not less than three are equidistantly distributed. The annular skeleton is provided with mounting holes adapted to the connecting portions. One end of the connecting portion is connected to the first sealing ring, and the other end of the connecting portion passes through the mounting hole of the annular skeleton and is connected to the second sealing ring.

[0015] As a preferred embodiment of the present utility model, the number of the connecting portions is one. The connecting portion is annular, and the annular skeleton is sleeved outside the connecting portion and contacts the outer wall of the connecting portion.

[0016] In a second aspect, an alkaline water electrolysis cell of the present utility model includes at least two electrolysis cell elements as described in the first aspect, and the at least two electrolysis cell elements are arranged in sequence; in any two adjacent electrolysis cell elements, a diaphragm is clamped between the first sealing ring of one electrolysis cell element and the second sealing ring of the other electrolysis cell element, and the flow guiding channel of one electrolysis element communicates with the corresponding flow guiding channel of the other electrolysis unit.

[0017] As a preferred embodiment of the present utility model, in any two adjacent electrolysis cell elements, the second sealing ring of one electrolysis cell element abuts against the inner side wall of the annular boss of the other electrolysis cell element.

[0018] As a preferred embodiment of the present utility model, the alkaline electrolyzer further includes two end plates, the electrolyzer unit components are arranged between the two end plates, and the two end plates are fixedly connected by bolts; at least one electrolyte flow hole and at least one gas flow hole are provided on the end plates.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] The present utility model provides an annular skeleton between the first sealing ring and the second sealing ring of the sealing gasket. The annular skeleton can well support the sealing gasket, avoiding the problems of improper fitting and excessive compression deformation of the sealing gasket;

[0021] The present utility model combines the sealing gasket, the annular skeleton, the bipolar plate, and the nickel mesh to form an electrolyzer unit component, which can effectively improve the installation efficiency, installation accuracy, and sealing performance of the electrolyzer;

[0022] The structure design of the electrolyzer unit component provided by the present utility model is reasonable, suitable for the working environment with alternating pressure and temperature for a long time, has a long service life, and can be reused. Description of the Drawings

[0023] Figure 1 The three-dimensional view of the sealing gasket provided by an embodiment of the present utility model;

[0024] Figure 2 The A-A cross-sectional view of the sealing gasket provided by an embodiment of the present utility model;

[0025] Figure 3 For Figure 2 The enlarged view of part A in

[0026] Figure 4 For Figure 2 The enlarged view of part B in

[0027] Figure 5 The three-dimensional view of the electrolyzer unit component provided by an embodiment of the present utility model;

[0028] Figure 6 The B-B cross-sectional view of the electrolyzer unit component provided by an embodiment of the present utility model;

[0029] Figure 7 For Figure 6 The enlarged view of part C in

[0030] Figure 8 The installation schematic diagram of two electrolyzer unit components and a diaphragm provided by an embodiment of the present utility model;

[0031] Figure 9C-C cross-sectional view of two electrolytic cell unit components and a diaphragm provided by an embodiment of the present utility model;

[0032] Figure 10 For Figure 9 Enlarged schematic view of part D in;

[0033] Figure 11 Structural schematic view of the electrolytic cell provided by the present utility model;

[0034] Figure 12 Three-dimensional view of the sealing gasket provided by another embodiment of the present utility model;

[0035] Figure 13 D-D cross-sectional view of the sealing gasket provided by another embodiment of the present utility model;

[0036] Figure 14 For Figure 2 Enlarged view of part E in;

[0037] Figure 15 For Figure 2 Enlarged view of part F in;

[0038] Figure 16 Structural schematic view of the integration of the bipolar plate and the annular skeleton provided by another embodiment of the present utility model;

[0039] Figure 17 Three-dimensional view of the electrolytic cell unit component provided by another embodiment of the present utility model;

[0040] Figure 18 E-E cross-sectional view of the electrolytic cell unit component and the diaphragm provided by another embodiment of the present utility model;

[0041] Figure 19 For Figure 18 Enlarged view of part G in;

[0042] Figure 20 Installation schematic view of two electrolytic cell unit components and a diaphragm provided by another embodiment of the present utility model;

[0043] Figure 21 F-F cross-sectional view of two electrolytic cell unit components and a diaphragm provided by another embodiment of the present utility model;

[0044] Figure 22 For Figure 21 Enlarged view of part H in.

[0045] In the figure, 1 - sealing ring, 11 - first sealing ring, 111 - first diversion hole, 112 - groove, 113 - annular boss, 114 - first convex ring, 12 - second sealing ring, 121 - second diversion hole, 122 - clamping groove, 123 - second convex ring, 13 - connecting part, 14 - flow channel groove, 141 - sealing convex line, 15 - annular hole, 16 - boss insert, 17 - first through hole, 2 - annular skeleton, 21 - third diversion hole, 22 - mounting hole, 23 - positioning ear, 24 - second through hole, 3 - bipolar plate, 31 - protrusion, 4 - diaphragm, 5 - support plate, 6 - end plate, 61 - electrolyte flow hole, 62 - gas flow hole. Detailed implementation mode

[0046] To better illustrate the purpose, technical solution and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0047] Please refer to Figure 1-22 , in the first aspect, the present invention provides an electrolytic cell unit component including a sealing gasket 1, an annular skeleton 2 and a bipolar plate 3. The sealing gasket 1 includes a gasket body with an annular structure. The middle part of the gasket body is an annular hole 15. The gasket body includes a first sealing ring 11, a second sealing ring 12 and a connecting part 13. The first sealing ring 11 and the second sealing ring 12 are connected through the connecting part 13. The first sealing ring 11 is provided with a first diversion hole 111, and the second sealing ring 12 is provided with a second diversion hole 121; the annular skeleton 2 is clamped between the first sealing ring 11 and the second sealing ring 12. The annular skeleton 2 is provided with a third diversion hole 21. The first diversion hole 111, the third diversion hole 21 and the second diversion hole 121 are sequentially communicated to form a diversion channel. The diversion channel is communicated with the annular hole 15 through the flow channel groove 14. Nickel meshes (not shown in the figure) are provided on two opposite surfaces of the bipolar plate 3. The bipolar plate 3 is arranged on the sealing gasket 1.

[0048] The present invention arranges the annular skeleton 2 between the first sealing ring 11 and the second sealing ring 12. The annular skeleton 2 can well support the sealing gasket 1, avoiding problems such as the sealing gasket 1 not being properly attached and excessive compression deformation; the present invention also combines the sealing gasket 1, the annular skeleton 2, the bipolar plate 3 and the nickel mesh together to form an electrolytic cell unit component, which can effectively improve the installation efficiency and installation accuracy of the electrolytic cell, and can also effectively improve the sealing performance of the electrolytic cell.

[0049] In one implementation mode, the first sealing ring 11, the connecting part 13 and the second sealing ring 12 are integrally formed.

[0050] In one implementation mode, the material of the sealing gasket 1 is rubber, and the rubber is thermoplastic rubber or thermosetting rubber.

[0051] It is understandable that the present utility model does not particularly limit the one-piece forming method, which can be integrally formed by casting, by molding, by machining, by injection, or by welding.

[0052] For example, the method of integrally forming the first sealing ring 11, the connecting portion 13, and the second sealing ring 12 can be: positioning the annular skeleton 2 in the positioning groove of the injection mold, injecting the kneaded rubber into the mold, and forming the sealing gasket 1 through vulcanization. For example, the method of integrally forming the first sealing ring 11, the connecting portion 13, and the second sealing ring 12 can be: placing the semi-finished rubber strip of rubber at the bottom of the mold, placing the annular skeleton 2 on the rubber strip, winding another semi-finished rubber strip around the annular skeleton 2, and forming the sealing gasket 1 through vulcanization. This way makes the processing cost of the unit parts lower.

[0053] In an embodiment, the first sealing ring 11 and the second sealing ring 12 are both provided with first through holes 17. The first through holes 17 on the first sealing ring 11 correspond to the first through holes 17 on the second sealing ring 12. The annular skeleton 2 is provided with second through holes 24 corresponding to the first through holes 17. The first through holes 17 and the second through holes 24 are communicated to form a heat exchange channel for passing a cooling medium (such as lye). The number of the heat exchange channels is not less than two and is equally spaced. When the alkaline water electrolysis cell works, lye can be introduced into the heat exchange channel through a pipeline. Through heat exchange, the lye can be preheated and the electrolysis cell can be cooled at the same time.

[0054] In an embodiment, a groove 112 is provided on the side of the first sealing ring 11 facing away from the second sealing ring 12. The groove 112 is communicated with the annular hole 15. The groove 112 is adapted to the bipolar plate 3, and the bipolar plate 3 is snap-fitted into the groove 112.

[0055] In an embodiment, an annular boss 113 is provided on the side of the first sealing ring 11 facing away from the second sealing ring 12. The annular boss 113 is adapted to the second sealing ring 12.

[0056] In an embodiment, a clamping groove 122 is provided on the side of the second sealing ring 12 facing away from the first sealing ring 11. The clamping groove 122 is communicated with the annular hole 15. The clamping groove 122 is adapted to the diaphragm 4.

[0057] Compared with the existing alkaline water electrolysis cell, the design of structures such as the groove 112, the annular boss 113, and the clamping groove 122 in the present utility model enables the alkaline water electrolysis cell not to need heating and locking after installation, and can effectively improve the installation efficiency and installation accuracy of the alkaline water electrolysis cell.

[0058] In an embodiment, a first convex ring 114 is provided on the side of the first sealing ring 11 facing away from the second sealing ring 12.

[0059] Specifically, the number of the first convex rings 114 is not less than two. For example, on the side of the first sealing ring 11 facing away from the second sealing ring 12, there is at least one of the following first convex rings 114 in (I) to (III): (I) the first convex ring 114 extending along the inner edge of the groove 112, (II) the first convex ring 114 extending along the outer edge of the annular boss 113, (III) the first convex ring 114 surrounding the opening of the first diversion hole 111.

[0060] In an embodiment, on the side of the second sealing ring 12 facing away from the first sealing ring 11, there is a second convex ring 123.

[0061] Specifically, the number of the second convex rings 123 is not less than two. For example, on the side of the second sealing ring 12 facing away from the first sealing ring 11, there is at least one of the following second convex rings 123 in (a) to (c): (a) the second convex ring 123 extending along the inner edge of the card slot 122, (b) the second convex ring 123 extending along the outer edge of the second sealing ring 12, (c) the second convex ring 123 surrounding the opening of the second diversion hole 121.

[0062] After the electrolytic cell is installed, the stress on the first convex ring 114 and the second convex ring 123 is relatively high, which can play a certain supporting role and at the same time help improve the sealing performance of the electrolytic cell.

[0063] It can be understood that the present invention does not particularly limit the sizes and longitudinal cross-sectional shapes of the first convex ring 114 and the second convex ring 123. Those skilled in the art can design the sizes and longitudinal cross-sectional shapes of the convex rings according to actual needs. For example, the longitudinal cross-sectional shapes of the convex rings are all semi-circular; for example, the sizes of the convex rings are designed according to the sealing force that the sealing ring 1 needs to withstand during the installation and operation of the electrolytic cell; for example, the ratio of the height of the first convex ring 114 to the thickness of the first sealing ring 11 is (0.0001 - 0.2):1, and the ratio of the height of the second convex ring 123 to the thickness of the second sealing ring 12 is (0.0001 - 0.2):1.

[0064] In an embodiment, the number of the connecting parts 13 is not less than three. The connecting parts 13 are located outside the ring hole 14, and the connecting parts 13 with a number not less than three are equally spaced. The annular skeleton 2 is provided with mounting holes 22 adapted to the connecting parts 13. One end of the connecting part 13 is connected to the first sealing ring 11, and the other end of the connecting part 13 passes through the mounting hole 22 of the annular skeleton 2 and is then connected to the second sealing ring 12.

[0065] It can be understood that the present invention does not particularly limit the shape of the connecting part 13. Those skilled in the art can design it according to the actual situation. For example, the connecting part 13 can be frustum-shaped, cylindrical, polygonal columnar or ellipsoidal columnar.

[0066] In one embodiment, the number of the connecting parts 13 is one. The connecting part 13 is annular. The annular skeleton 2 is sleeved outside the connecting part 13 and contacts with the outer wall of the connecting part 13.

[0067] In one embodiment, the number of the diversion channels and the flow channel grooves 14 is equal, and is not less than two. At least one of the flow channel grooves 14 is arranged on the first sealing ring 11, and the remaining flow channel grooves 14 are arranged on the second sealing ring 12. The flow channel groove 14 arranged on the second sealing ring 12 is communicated with the clamping groove 122.

[0068] In one embodiment, a sealing convex line 141 is arranged along the outer periphery of the opening of the flow channel groove 14. The design of the sealing convex line 141 helps to improve the sealing performance of the electrolytic cell.

[0069] In one embodiment, a boss insert 16 is arranged inside the flow channel groove 14. The number of the boss inserts 16 is preferably not less than two, and the boss inserts 16 are equally spaced.

[0070] In the utility model, by arranging the boss insert 16 inside the flow channel groove 14, it can be more ensured that the flow channel groove 14 will not be blocked due to the compression of the sealing gasket 1 during the installation of the electrolytic cell.

[0071] For example, two rows of boss inserts 13 are arranged inside the flow channel groove 14. The number of the boss inserts 13 in each row is not less than two and they are equally spaced. A gap is left between the two rows of boss inserts 13.

[0072] In one embodiment, the bipolar plate 3 and the annular skeleton 2 are integrally formed and connected to form a plate-like structure.

[0073] In one embodiment, the material of the annular skeleton 2 is metal or non-metal. The non-metal can be SMC, polyurethane, epoxy resin, unsaturated polyester or polyacrylate.

[0074] In one embodiment, positioning lugs 23 are arranged on the outer wall of the annular skeleton 2, and positioning holes are arranged on the positioning lugs 23. With the design of this positioning structure, it is convenient to align each electrolytic cell unit during installation, which is beneficial to improving the installation efficiency.

[0075] In one embodiment, the material of the bipolar plate 3 is metal.

[0076] In one embodiment, a plurality of protrusions 31 are arranged on both opposite surfaces of the bipolar plate 3. The protrusions 31 are adapted to the mesh holes of the nickel mesh. During installation, the nickel mesh is covered on the surface of the bipolar plate 2, and the protrusions 31 are clamped in the mesh holes of the nickel mesh.

[0077] In one embodiment, the width of the annular skeleton 2 is not less than the width of the first sealing ring 11, and the width of the annular skeleton 2 is not less than the width of the second sealing ring 12.

[0078] In a second aspect, as Figure 1~22 shown, the present utility model provides an alkaline water electrolysis cell, which includes at least two electrolysis cell unit components arranged in sequence; in any two adjacent electrolysis cell unit components, a diaphragm 4 is clamped between a first sealing ring 11 of one electrolysis cell unit component and a second sealing ring 12 of the other electrolysis cell unit component, a gap is left between the diaphragm 4 and the adjacent nickel mesh, and a diversion channel of one electrolysis component is communicated with a corresponding diversion channel of the other electrolysis unit.

[0079] In an embodiment, in any two adjacent electrolysis cell unit components, the second sealing ring 12 of one electrolysis cell unit component abuts against the inner side wall of the annular boss 113 of the other electrolysis cell unit component.

[0080] In an embodiment, in any two adjacent electrolysis cell unit components, a heat exchange channel of one electrolysis cell unit component is communicated with a heat exchange channel of the other electrolysis cell unit component.

[0081] In an embodiment, a clamping groove 122 of one electrolysis cell unit component and the first sealing ring 11 of the other electrolysis cell unit component are combined to form a diaphragm accommodating groove with an opening facing the ring hole 15, and the diaphragm 4 is clamped with the diaphragm accommodating groove.

[0082] Specifically, the diaphragm 4 abuts against the boss insert 16 in the corresponding flow channel groove 14.

[0083] Specifically, a support plate 5 is arranged between the diaphragm 4 and the boss insert 16 in the corresponding flow channel groove 14. The support plate 5 is made of a metal material or a plastic material with a hardness greater than that of the diaphragm 4 and the sealing gasket 1.

[0084] In an embodiment, the alkaline water electrolysis cell further includes two end plates 6. The electrolysis cell unit components are arranged between the two end plates 6, and the two end plates 6 are tightly connected by bolts.

[0085] Furthermore, the end plate 6 is provided with at least one electrolyte circulation hole 61 and at least one gas circulation hole 52.

[0086] Furthermore, the end plate 6 is provided with an accommodating groove adapted to the sealing gasket 1. During installation, the sealing gaskets 1 at the head end and the tail end are respectively accommodated in the corresponding accommodating grooves, and the outer wall of the sealing gasket 1 is in close contact with the inner wall of the accommodating groove, so as to achieve a good sealing effect.

[0087] It is understandable that the present utility model places no particular restrictions on the shapes and sizes of components such as the annular skeleton 2, bipolar plate 3, first sealing ring 11, second sealing ring 12, and diaphragm 4. Those skilled in the art can design them according to actual needs. For example, the shapes of the annular skeleton 2, first sealing ring 11, and second sealing ring 12 can be circular, elliptical, or polygonal; the shapes of the diaphragm 4 and bipolar plate 3 can be circular, elliptical, or polygonal. Preferably, the shapes of the annular skeleton 2, first sealing ring 11, and second sealing ring 12 are circular, and the shapes of the diaphragm 4 and bipolar plate 3 are circular.

[0088] The present utility model provides the following embodiments to facilitate the understanding of the present utility model. These embodiments are provided by the present utility model not to limit the scope of the claims.

[0089] Embodiment 1

[0090] Please refer to Figure 1-11 , this embodiment provides an electrolytic cell unit component and an alkaline water electrolyzer.

[0091] The electrolytic cell unit component includes a sealing gasket 1, an annular skeleton 2, and a bipolar plate 3. The sealing gasket 1 includes a gasket body with an annular structure. The middle part of the gasket body is an annular hole 15. The gasket body includes a first sealing ring 11, a second sealing ring 12, and a connecting part 13. The first sealing ring 11 and the second sealing ring 12 are connected through the connecting part 13. The first sealing ring 11 is provided with a first diversion hole 111, and the second sealing ring 12 is provided with a second diversion hole 121. The annular skeleton 2 is clamped between the first sealing ring 11 and the second sealing ring 12. The annular skeleton 2 is provided with a third diversion hole 21. The first diversion hole 111, the third diversion hole 21, and the second diversion hole 121 are sequentially connected to form a diversion channel. The diversion channel is connected to the annular hole 15 through a flow channel groove 14. Nickel meshes (not shown in the figure) are provided on two opposite surfaces of the bipolar plate 3. The bipolar plate 3 is arranged on the sealing gasket 1.

[0092] The material of the sealing gasket 1 is rubber. The first sealing ring 11, the connecting part 13, and the second sealing ring 12 are integrally formed. The connecting part 13 is annular. The annular skeleton 2 is sleeved outside the connecting part 13 and contacts the outer wall of the connecting part 13. Specifically, the annular skeleton 2 is positioned in the positioning groove of the injection mold, and the kneaded rubber is injected into the mold and vulcanized to form the sealing gasket 1.

[0093] On one side of the first sealing ring 11 facing away from the second sealing ring 12, there is a groove 112. The groove 112 communicates with the ring hole 15. The groove 112 is adapted to the bipolar plate 3, and the bipolar plate 3 is accommodated in the groove 112. On one side of the first sealing ring 11 facing away from the second sealing ring 12, there is an annular boss 113, and the annular boss 113 is adapted to the second sealing ring 12. On one side of the second sealing ring 12 facing away from the first sealing ring 11, there is a card slot 122. The card slot 122 communicates with the ring hole 15, and the card slot 122 is adapted to the diaphragm 4. In this embodiment, by providing structures such as the groove 112, the annular boss 113, and the card slot 122 on the sealing gasket 1, heating and locking are not required after the installation of the alkaline water electrolyzer, which can effectively improve the installation efficiency and installation accuracy of the alkaline water electrolyzer.

[0094] The number of the diversion channels and the flow channel grooves 14 is equal and not less than two; at least one of the flow channel grooves 14 among the not less than flow channel grooves 14 is arranged on the first sealing ring 11, and the remaining flow channel grooves 14 are arranged on the second sealing ring 12. There is a boss insert 16 in the flow channel groove 14. The number of the boss inserts 16 is preferably not less than two, and the boss inserts 16 are equally spaced; by arranging the boss inserts 16 made of hard materials in the flow channel groove 14, it can be more ensured that the flow channel groove 14 will not be blocked due to the compression of the sealing gasket 1 during the installation of the electrolyzer, and the diaphragm 4 can also be well supported.

[0095] On one side of the first sealing ring 11 facing away from the second sealing ring 12, there are the following first convex rings 114: (I) the first convex ring 114 extending along the inner edge of the groove 112, (II) the first convex ring 114 extending along the outer edge of the annular boss 113, (III) the first convex ring 114 surrounding the opening of the first diversion hole 111. On one side of the second sealing ring 12 facing away from the first sealing ring 11, there are the following second convex rings 123: (a) the second convex ring 123 extending along the inner edge of the card slot 122, (b) the second convex ring 123 extending along the outer edge of the second sealing ring 12, (c) the second convex ring 123 surrounding the opening of the second diversion hole 121; there is a sealing convex line 141 along the outer periphery of the opening of the flow channel groove 14. In this embodiment, by providing structures such as the first convex ring 114, the second convex ring 123, and the sealing convex line 141 on the sealing gasket 1, it can play a certain supporting role and at the same time help improve the sealing performance of the electrolyzer.

[0096] The material of the annular skeleton 2 is metal.

[0097] The material of the bipolar plate 3 is metal. On the two opposite surfaces of the bipolar plate 3 corresponding to the ring hole 15, there are a number of protrusions 31 provided. The protrusions 31 are adapted to the mesh holes of the nickel mesh. During installation, the nickel mesh is covered on the surface of the bipolar plate 2, and the protrusions 31 are inserted into the mesh holes of the nickel mesh.

[0098] The alkaline water electrolyzer includes at least two electrolyzer unit components, which are arranged in sequence; in any two adjacent electrolyzer unit components, a diaphragm 4 is clamped between the first sealing ring 11 of one electrolyzer unit component and the second sealing ring 12 of the other electrolyzer unit component. There is a gap between the diaphragm 4 and the adjacent nickel mesh. The diversion channel of one electrolysis element is communicated with the corresponding diversion channel of the other electrolysis unit; the second sealing ring 12 of one electrolyzer unit component abuts against the inner side wall of the annular boss 113 of the other electrolyzer unit component.

[0099] In any two adjacent electrolyzer unit components, the clamping groove 122 of one electrolyzer unit component and the first sealing ring 11 of the other electrolyzer unit component form a diaphragm accommodating groove with an opening facing the annular hole 15, and the diaphragm 4 is clamped with the diaphragm accommodating groove; the diaphragm 4 abuts against the boss insert 16 in the corresponding flow channel groove 14.

[0100] The alkaline water electrolyzer further includes two end plates 6. The electrolyzer unit components are arranged between the two end plates 6, and the two end plates 6 are fixedly connected by bolts. The end plate 6 is provided with at least one electrolyte circulation hole 61 and at least one gas circulation hole 52; the end plate 6 is provided with a accommodating groove adapted to the sealing gasket 1. During installation, the sealing gaskets 1 at the head end and the tail end are respectively accommodated in the corresponding accommodating grooves, and the outer wall of the sealing gasket 1 is in close contact with the inner wall of the accommodating groove, so as to achieve a good sealing effect.

[0101] Embodiment 2

[0102] Please refer to Figure 11~22 , this embodiment provides an electrolyzer unit component and an alkaline water electrolyzer.

[0103] The electrolyzer unit component includes a sealing gasket 1, an annular skeleton 2 and a bipolar plate 3. The sealing gasket 1 includes a gasket body with an annular structure. The middle part of the gasket body is an annular hole 15. The gasket body includes a first sealing ring 11, a second sealing ring 12 and a connecting part 13. The first sealing ring 11 and the second sealing ring 12 are connected by the connecting part 13. The first sealing ring 11 is provided with a first diversion hole 111, and the second sealing ring 12 is provided with a second diversion hole 121; the annular skeleton 2 is clamped between the first sealing ring 11 and the second sealing ring 12. The annular skeleton 2 is provided with a third diversion hole 21. The first diversion hole 111, the third diversion hole 21 and the second diversion hole 121 are sequentially communicated to form a diversion channel. The diversion channel is communicated with the annular hole 15 through a flow channel groove 14. Nickel meshes (not shown in the figure) are arranged on two opposite surfaces of the bipolar plate 3, and the bipolar plate 3 is arranged on the sealing gasket 1.

[0104] Both the bipolar plate 3 and the annular framework 2 are made of metal, and the bipolar plate 3 and the annular framework 2 are integrally formed and connected to form a plate-like structure. The outer wall of the annular framework 2 is provided with positioning lugs 23, and positioning holes are provided on the positioning lugs 23. The design of this positioning structure facilitates the alignment of each electrolytic cell unit during installation, which is beneficial to improving the installation efficiency.

[0105] A number of protrusions are provided on both opposite surfaces of the bipolar plate 3 ( Figure 12-22 not shown in the figure). The protrusions are adapted to the mesh holes of the nickel mesh. During installation, the nickel mesh is covered on the surface of the bipolar plate 2, and the protrusions are inserted into the mesh holes of the nickel mesh.

[0106] The first sealing ring 11, the connecting portion 13, and the second sealing ring 12 are integrally formed; the sealing gasket 1 is made of rubber, and the rubber is thermoplastic rubber or thermosetting rubber. The number of the connecting portions ( Figure 12-22 not shown in the figure) is not less than three. The connecting portions 13 are located outside the ring hole 14, and the connecting portions 13 with the number not less than three are equally spaced. The annular framework 2 is provided with mounting holes 22 adapted to the connecting portions 13. One end of the connecting portion 13 is connected to the first sealing ring 11, and the other end of the connecting portion 13 passes through the mounting hole 22 of the annular framework 2 and is connected to the second sealing ring 12. The method for integrally forming the first sealing ring 11, the connecting portion 13, and the second sealing ring 12 is as follows: The semi-finished rubber strip is placed at the bottom of the mold, the plate-like structure is placed on the rubber strip, and another semi-finished rubber strip is wound around the annular framework 2 of the plate-like structure. After vulcanization, the sealing gasket 1 is formed. This method makes the processing cost of the unit component lower.

[0107] Both the first sealing ring 11 and the second sealing ring 12 are provided with first through holes 17. The first through holes 17 on the first sealing ring 11 correspond to the first through holes 17 on the second sealing ring 12. The annular framework 2 is provided with second through holes 24 corresponding to the first through holes 17. The first through holes 17 and the second through holes 24 communicate to form a heat exchange channel for passing a cooling medium (such as lye). The number of the heat exchange channels is not less than two and they are equally spaced. When the alkaline water electrolyzer is working, lye can be introduced into the heat exchange channel through a pipeline. After heat exchange, the lye can be preheated and the electrolyzer can be cooled down.

[0108] On one side of the first sealing ring 11 facing away from the second sealing ring 12, there is a groove 112. The groove 112 communicates with the ring hole 15. The groove 112 is adapted to the bipolar plate 3, and the bipolar plate 3 is accommodated in the groove 112. On one side of the first sealing ring 11 facing away from the second sealing ring 12, there is an annular boss 113, and the annular boss 113 is adapted to the second sealing ring 12. On one side of the second sealing ring 12 facing away from the first sealing ring 11, there is a clamping groove 122. The clamping groove 122 communicates with the ring hole 15, and the clamping groove 122 is adapted to the diaphragm 4. In this embodiment, by providing structures such as the groove 112, the annular boss 113, and the clamping groove 122 on the sealing gasket 1, heating and locking are not required after the installation of the alkaline electrolyzer, which can effectively improve the installation efficiency and installation accuracy of the alkaline electrolyzer.

[0109] The number of the diversion channels and the flow channel grooves 14 is equal, and both are not less than two; at least one of the flow channel grooves 14 among the not less than flow channel grooves 14 is provided on the first sealing ring 11, and the remaining flow channel grooves 14 are provided on the second sealing ring 12. There is a boss insert 16 inside the flow channel groove 14. The number of the boss inserts 16 is preferably not less than two, and the boss inserts 16 are equally spaced; by providing the boss inserts 16 made of hard material inside the flow channel groove 14, it can be more ensured that the flow channel groove 14 will not be blocked due to the compression of the sealing gasket 1 during the installation of the electrolyzer, and it can also well support the diaphragm 4.

[0110] On one side of the first sealing ring 11 facing away from the second sealing ring 12, there are the following first convex rings 114: (I) the first convex ring 114 extending along the inner edge of the groove 112, (II) the first convex ring 114 extending along the outer edge of the annular boss 113, (III) the first convex ring 114 surrounding the opening of the first diversion hole 111. On one side of the second sealing ring 12 facing away from the first sealing ring 11, there are the following second convex rings 123: (a) the second convex ring 123 extending along the inner edge of the clamping groove 122, (b) the second convex ring 123 extending along the outer edge of the second sealing ring 12, (c) the second convex ring 123 surrounding the opening of the second diversion hole 121; there is a sealing convex line 141 provided on the outer periphery of the opening of the flow channel groove 14. In this embodiment, by providing structures such as the first convex ring 114, the second convex ring 123, and the sealing convex line 141 on the sealing gasket 1, it can play a certain supporting role and at the same time help to improve the sealing performance of the electrolyzer.

[0111] The alkaline water electrolyzer includes at least two electrolytic cell unit components, which are arranged in sequence; in any two adjacent electrolytic cell unit components, a diaphragm 4 is clamped between the first sealing ring 11 of one electrolytic cell unit component and the second sealing ring 12 of the other electrolytic cell unit component. There is a gap between the diaphragm 4 and the adjacent nickel mesh. The diversion channels of one electrolytic component are communicated with the corresponding diversion channels of the other electrolytic unit. The second sealing ring 12 of one electrolytic cell unit component abuts against the inner side wall of the annular boss 113 of the other electrolytic cell unit component. The heat exchange channels of one electrolytic cell unit component are communicated with the heat exchange channels of the other electrolytic cell unit component.

[0112] In any two adjacent electrolytic cell unit components, the clamping groove 122 of one electrolytic cell unit component and the first sealing ring 11 of the other electrolytic cell unit component form a diaphragm accommodating groove with an opening facing the annular hole 15, and the diaphragm 4 is clamped with the diaphragm accommodating groove; the diaphragm 4 abuts against the boss insert 16 in the corresponding flow channel groove 14.

[0113] A support plate 5 is arranged between the diaphragm 4 and the boss insert 16 in the corresponding flow channel groove 14. The support plate 5 is made of metal or plastic with a hardness greater than that of the diaphragm 4 and the sealing gasket 1. The setting of the support plate 5 can play a good supporting role for the diaphragm 4.

[0114] The alkaline water electrolyzer further includes two end plates 6. The electrolytic cell unit components are arranged between the two end plates 6, and the two end plates 6 are tightly connected by bolts. The end plate 6 is provided with at least one electrolyte circulation hole 61 and at least one gas circulation hole 52; the end plate 6 is provided with a accommodating groove adapted to the sealing gasket 1. During installation, the sealing gaskets 1 at the head end and the tail end are respectively accommodated in the corresponding accommodating grooves, and the outer wall of the sealing gasket 1 is in close contact with the inner wall of the accommodating groove, so as to achieve a good sealing effect.

[0115] In the description of the present utility model, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. All directional indication words (such as up and down) in the present utility model are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indication also changes accordingly.

[0116] In the description of the present utility model, it should also be noted that the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0117] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the term "connected" should be understood in a broad sense. For example, it can be directly connected or indirectly connected through an intermediate medium.

[0118] For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit the protection scope of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present utility model.

Claims

1. An electrolytic cell unit component, characterized in that, It includes a sealing gasket, an annular skeleton and a bipolar plate. The sealing gasket includes a gasket body with an annular structure. The middle part of the gasket body is an annular hole. The gasket body includes a first sealing ring, a second sealing ring and a connecting part. One end of the first sealing ring is connected to the connecting part, and the other end of the second sealing ring is connected to the connecting part. The first sealing ring is provided with a first diversion hole, and the second sealing ring is provided with a second diversion hole; the annular skeleton is clamped between the first sealing ring and the second sealing ring. The annular skeleton is provided with a third diversion hole. The first diversion hole, the third diversion hole and the second diversion hole are sequentially communicated to form a diversion channel. The diversion channel is communicated with the annular hole through a flow channel groove. Nickel meshes are arranged on two opposite surfaces of the bipolar plate. The bipolar plate is arranged on the sealing gasket.

2. The electrolytic cell unit according to claim 1, characterized in that, The bipolar plate and the annular skeleton are integrally formed.

3. The electrolytic cell unit according to claim 1, characterized in that, A groove is arranged on one side of the first sealing ring facing away from the second sealing ring. The groove is communicated with the annular hole. The groove is adapted to the bipolar plate. The bipolar plate is accommodated in the groove.

4. The electrolytic cell unit according to claim 1, wherein, The first sealing ring, the connecting part and the second sealing ring are integrally formed.

5. The electrolytic cell unit according to claim 1, characterized in that, An annular boss is arranged on one side of the first sealing ring facing away from the second sealing ring. The annular boss is adapted to the second sealing ring; a first convex ring is arranged on one side of the first sealing ring facing away from the second sealing ring, and a second convex ring is arranged on one side of the second sealing ring facing away from the first sealing ring.

6. The electrolytic cell unit according to claim 1, characterized in that, A clamping groove is arranged on one side of the second sealing ring facing away from the first sealing ring. The clamping groove is communicated with the annular hole. The clamping groove is adapted to the diaphragm.

7. The electrolytic cell unit according to claim 1, characterized in that, The number of the connecting parts is not less than three. The connecting parts are located outside the annular hole. The connecting parts with the number not less than three are equidistantly distributed. The annular skeleton is provided with mounting holes adapted to the connecting parts. One end of the connecting part is connected to the first sealing ring, and the other end of the connecting part passes through the mounting hole of the annular skeleton and is connected to the second sealing ring.

8. The electrolytic cell unit according to claim 1, characterized in that, The number of the connecting parts is one. The connecting part is annular. The annular skeleton is sleeved outside the connecting part and is in contact with the outer wall of the connecting part.

9. An alkaline water electrolyzer, characterized in that, It includes at least two electrolytic cell unit components as described in any one of claims 1 to 8. The at least two electrolytic cell unit components are sequentially arranged; in any two adjacent electrolytic cell unit components, a diaphragm is clamped between the first sealing ring of one electrolytic cell unit component and the second sealing ring of the other electrolytic cell unit component, and the diversion channel of one electrolytic component is communicated with the corresponding diversion channel of the other electrolytic unit.

10. The alkaline water electrolyzer according to claim 9, characterized in that, In any two adjacent electrolytic cell unit components, the second sealing ring of one electrolytic cell unit component abuts against the inner side wall of the annular boss of the other electrolytic cell unit component.

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