Electrolytic bath sealing component and electrolysis device thereof

Abstract

The invention relates to the technical field of electrolytic bath sealing, in particular to an electrolytic bath sealing component and an electrolyzer thereof, the interior of the electrolytic bath sealing component is in press fit with the edge of a diaphragm, and the electrolytic bath sealing component is characterized by comprising a convex gasket and a concave gasket which are parallel and attached to each other; a butt joint groove is formed in the inner side end face of the concave gasket. A plurality of bulges are arranged on the end surface of the inner side of the convex gasket; one end face of the diaphragm abuts against the butt joint groove, and the other end face of the diaphragm abuts against the protrusion. The protrusions, the butt joint grooves and the diaphragms are effectively matched, under the condition of the same sealing extrusion force, the sealing pressure intensity of the free ends of the protrusions can be enhanced, then the sealing effect is improved, and electrolyte flowing in all directions at the edges of the diaphragms is effectively prevented from seeping out. And the convex sealing structure also enhances the connection stability of the edge of the diaphragm and the pair of gaskets, so that the edge of the diaphragm can be prevented from slipping into an electrolysis area due to pressure fluctuation or overhigh pressure, and the potential safety hazard caused by mixing of cathode and anode gases is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic cell sealing, and particularly relates to an electrolytic cell sealing component and an electrolytic device thereof. Background Art

[0002] The diaphragm used in the alkaline water electrolysis cell is generally an isotropic diaphragm. The electrolyte will not only pass through the diaphragm in the direction perpendicular to the surface of the diaphragm, but also seep out from the edge of the diaphragm. Therefore, it is necessary to adopt a suitable sealing method and component design to ensure the sealing performance and safety reliability of the electrolytic device.

[0003] The existing electrolytic device usually seals through a pair of parallel and fitting gaskets. The electrolytic device squeezes a plurality of electrolytic cells arranged in an array through a pressing mechanism. A pair of gaskets are clamped between the frames of adjacent electrolytic cells, and the edge of the diaphragm is clamped between the pair of gaskets. Finally, the diaphragm can separate adjacent electrolytic cells to avoid the safety hazard formed by the mixing of anode and cathode gases. However, the pair of parallel and fitting gaskets are in surface-to-surface contact, so that the two end faces of the diaphragm edge are in surface-to-surface contact with the inner end faces of the pair of gaskets, and the sealing effect of the surface-to-surface fitting sealing method is poor. When the gas pressure is too high or the pressure fluctuation is too large during the electrolysis process, there is a risk that the diaphragm edge will slip into the electrolysis area, resulting in diaphragm failure and poor connection stability. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an electrolytic cell sealing component and an electrolytic device thereof, which solve the technical problems of poor sealing effect of the electrolytic cell sealing component using the surface-to-surface fitting sealing method and poor connection stability of the diaphragm edge.

[0006] (2) Technical Solutions

[0007] In order to achieve the above object, the inside of the electrolytic cell sealing component of the present invention is press-fitted with the edge of the diaphragm. The electrolytic cell sealing component includes a convex gasket and a concave gasket that are parallel and fittingly arranged;

[0008] A docking groove is provided on the inner end face of the concave gasket;

[0009] A plurality of protrusions are provided on the inner end face of the convex gasket; one end face of the diaphragm abuts against the docking groove, and the other end face abuts against the protrusions.

[0010] Optionally, a sealing groove communicating with the docking groove is further provided on the concave gasket; the edge of the diaphragm fits into the sealing groove;

[0011] The electrolytic cell sealing component further includes a sealing strip built in the sealing groove; the sealing strip is in contact with the edge of the diaphragm and the end face of the convex gasket at the same time.

[0012] Optionally, the part of the inner end face of the concave gasket where the docking groove and the sealing groove are not opened is a fitting surface;

[0013] The protrusion is in contact with the fitting surface.

[0014] Optionally, a pressing component is integrally arranged on the inner end face of the convex gasket;

[0015] The pressing component presses the edge of the diaphragm into the sealing groove.

[0016] Optionally, the sum of the thickness of the protrusion and the thickness of the diaphragm is greater than the distance between the docking groove and the inner end face of the convex gasket.

[0017] Optionally, the free end of the protrusion is provided with an arc chamfer.

[0018] Optionally, the sealing strip includes rubber and tetrafluoro material.

[0019] Optionally, along the length direction of the sealing strip, the sealing strip is arranged continuously or intermittently.

[0020] Furthermore, the present invention also provides an electrolysis device, and the electrolysis device includes the electrolytic cell sealing component as described above.

[0021] Optionally, the electrolysis device includes an extrusion mechanism, a plurality of electrolytic cells, a plurality of diaphragms and a plurality of the electrolytic cell sealing components;

[0022] A plurality of the electrolytic cells are arranged in an array inside the extrusion mechanism; the diaphragm and the electrolytic cell sealing component are arranged between adjacent electrolytic cells; in the circumferential direction of the diaphragm, the edge of the diaphragm is correspondingly connected to a plurality of the electrolytic cell sealing components;

[0023] The extrusion mechanism can extrude a plurality of the electrolytic cells, a plurality of the diaphragms and a plurality of the electrolytic cell sealing components along the array direction of the plurality of electrolytic cells.

[0024] (III) Beneficial effects

[0025] The beneficial effects of the present invention are:

[0026] Each protrusion plays a sealing role, greatly improving the sealing performance of a pair of gaskets. The part outside the inner end face of the gasket, that is, the part of the inner end face of the concave gasket where the docking groove is not opened, is in surface contact with the outside of the inner end face of the convex gasket, and can be the same as the existing sealing method. The surface-to-surface fitting seal is used in combination with the protrusion sealing structure to form a double-sealing structure.

[0027] The protrusion, docking groove and diaphragm cooperate effectively. Under the condition of the same sealing extrusion pressure, it can enhance the sealing pressure of the free end of the protrusion, thereby improving the sealing effect and effectively preventing the electrolyte seeping out from flowing in all directions at the edge of the diaphragm. The protrusion sealing structure also enhances the connection stability between the edge of the diaphragm and a pair of gaskets, and can prevent the edge of the diaphragm from slipping into the electrolysis area due to pressure fluctuations or excessive pressure, thus avoiding the potential safety hazard caused by the mixing of anode and cathode gases. The design of the electrolytic cell sealing component is safe, efficient, low-cost and easy to operate. Description of the Drawings

[0028] Figure 1 Schematic structural diagram of the electrolytic cell sealing component in the first embodiment of the present invention;

[0029] Figure 2 Schematic structural diagram of the electrolytic cell sealing component in the second embodiment of the present invention;

[0030] Figure 3 Schematic structural diagram of the electrolytic cell sealing component in the third embodiment of the present invention;

[0031] Figure 4 Schematic structural diagram of the electrolytic cell sealing component in the fourth embodiment of the present invention;

[0032] Figure 5 Schematic structural diagram of the electrolysis device of the present invention.

[0033]

Description of the Reference Numerals

[0034] 1: Diaphragm;

[0035] 2: Convex gasket; 21: Protrusion;

[0036] 3: Concave gasket; 31: Docking groove; 32: Sealing groove; 33: Fitting surface;

[0037] 4: Sealing strip;

[0038] 5: Extrusion mechanism;

[0039] 6: Electrolytic cell; 61: Electrolytic cell frame;

[0040] 7: Pressing member. Detailed Embodiments

[0041] In order to better explain the present invention for easy understanding, the present invention will be described in detail below with reference to the drawings through specific embodiments.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] First embodiment:

[0046] See also Figure 1 The present invention provides an electrolytic cell sealing component, the interior of the electrolytic cell sealing component is pressed against the edge of the diaphragm 1, and the electrolytic cell sealing component includes a convex gasket 2 and a concave gasket 3 that are arranged in parallel and in close contact; a docking groove 31 is provided inside the inner end surface of the concave gasket 3; a plurality of protrusions 21 are provided inside the inner end surface of the convex gasket 2; one end surface of the diaphragm 1 abuts against the docking groove 31, and the other end surface abuts against the protrusion 21. In this embodiment, the edge of the diaphragm 1 refers to the portion of the diaphragm 1 clamped in a pair of gaskets, and the diaphragm 1 is fixed and sealed by a pair of gaskets.

[0047] The cross-section of the docking groove 31 is an L-shaped groove. The protrusion 21 can be presented as a wavy protrusion structure. The diaphragm 1 is pressed against the docking groove 31 through the protrusion 21 to achieve sealing. Each protrusion 21 plays a sealing role, greatly improving the sealing performance of a pair of gaskets. The outer part of the inner end face of the gasket, that is, the part of the inner end face of the concave gasket 3 where the docking groove 31 is not provided, is in surface contact with the outer part of the inner end face of the convex gasket 2, which can be the same as the existing sealing method to form an enclosing structure of the docking groove 31, effectively preventing the electrolyte from seeping out. The surface-to-surface fitting seal is used in combination with the protrusion sealing structure to form a double-sealing structure. Among them, the protrusion sealing structure is an auxiliary sealing structure that blocks most of the electrolyte from entering the docking groove 31; the surface-to-surface fitting seal is the main sealing structure that fences in the small amount of electrolyte that seeps into the docking groove 31 to prevent the electrolyte from seeping out.

[0048] Compared with the traditional sealing method that only has surface-to-surface fitting, the protrusion 21, the docking groove 31 and the diaphragm 1 cooperate effectively. Under the condition of the same sealing extrusion pressure, it can enhance the sealing pressure of the free end of the protrusion 21, thereby improving the sealing effect and effectively preventing the electrolyte flowing in all directions at the edge of the diaphragm 1 from seeping out. The protrusion sealing structure also enhances the connection stability between the edge of the diaphragm 1 and a pair of gaskets, and can prevent the edge of the diaphragm 1 from slipping into the electrolysis area due to pressure fluctuation or excessive pressure, thus avoiding the safety hazard caused by the mixing of anode and cathode gases. The electrolytic cell sealing component is designed safely, efficiently, inexpensively and is easy to operate.

[0049] Second Embodiment:

[0050] As Figure 2 shown, on the basis of the first embodiment, a sealing groove 32 communicating with the docking groove 31 is further provided on the concave gasket 3; the edge of the diaphragm 1 fits in the sealing groove 32, and the edge of the diaphragm 1 refers to the part where the edge fits with the sealing groove 32; the electrolytic cell sealing component further includes a sealing strip 4 disposed in the sealing groove 32; the sealing strip 4 is in contact with both the edge of the diaphragm 1 and the end face of the convex gasket 2. Specifically, the sealing strip 4 seals the sealing groove 32 to form a third sealing structure, which is used as an auxiliary sealing structure. At the same time, by virtue of the resultant force received by the sealing strip 4, the connection strength between the edge of the diaphragm 1 and a pair of gaskets is enhanced, and the risk of the edge of the diaphragm 1 slipping out of a pair of gaskets is further reduced.

[0051] In this embodiment, the cross-section of the sealing strip 4 is in an O shape. Under the extrusion force of a pair of gaskets, the sealing strip 4 is deformed under pressure so that the sealing strip 4 can basically fill the sealing groove 32, thereby pressing the edge of the diaphragm 1 firmly in the sealing groove 32, further enhancing the connection strength and waterproof performance of the diaphragm 1.

[0052] Third Embodiment:

[0053] Refer to Figure 3, the part of the inner end face of the concave gasket 3 without the docking groove 31 and the sealing groove 32 is the fitting surface 33; the protrusion 21 abuts against the fitting surface 33. On the basis of the second embodiment, a protrusion 21 is additionally provided on the outer part of the inner end face of the convex gasket 2, so that the outside of the pair of gaskets also has a multi-layer sealing effect, enhancing the sealing performance of the outside of the pair of gaskets. At this time, the head end water seepage of the diaphragm 1 is blocked by the protrusion 21 and the fitting surface 33.

[0054] Fourth Embodiment:

[0055] As Figure 4 shown, on the basis of the third embodiment, a pressing member 7 is integrally provided on the inner end face of the convex gasket 2; the pressing member 7 presses the edge of the diaphragm 1 into the sealing groove 32. The integral setting optimizes the disassembly and assembly process of the pressing member 7 and the convex gasket 2, reduces the installation difficulty of the edge of the diaphragm 1 in the sealing groove 32, and further enhances the sealing performance of the joint surface between the pressing member 7 and the inner end face of the convex gasket 2 after the integral setting.

[0056] Furthermore, the sum of the thickness of the protrusion 21 and the thickness of the diaphragm 1 is greater than the distance between the docking groove 31 and the inner end face of the convex gasket 2. Specifically, the diaphragm 1 has a certain elasticity, so that the free end of the protrusion 21 can be embedded into the end face of the diaphragm 1, further enhancing the sealing performance of the protrusion sealing structure and the connection strength with the diaphragm 1.

[0057] Secondly, the free end of the protrusion 21 in contact with the diaphragm 1 is provided with a rounded chamfer to prevent its sharp end from cutting the diaphragm 1 and ensure that there is no risk of failure of the diaphragm 1. The cross-section of the protrusion 21 can be triangular, trapezoidal or arc-shaped, preferably triangular, to reduce the stress area at the end of the protrusion 21 and increase the sealing pressure of the free end of the protrusion 21.

[0058] In addition, the sealing strip 4 is made of insulating non-metallic materials, including rubber and tetrafluoro materials. The cross-section of the sealing strip 4 can be common regular shapes such as rectangular, circular, oval, triangular or trapezoidal, or multi-sided irregular shapes such as convex-shaped, concave-shaped or serrated. The shape and size of the sealing groove 32 are adapted to the shape and size of the sealing strip 4 in the pressed state to completely compact the part of the diaphragm 1 located in the sealing groove 32, thereby improving the sealing performance and connection strength between the diaphragm 1 and the pair of gaskets. Optionally, a tetrafluoro film is lined on the rubber surface, and the tetrafluoro material has corrosion resistance and can extend the service life of the sealing strip 4.

[0059] Further, along the length direction of the sealing strip 4, the sealing strip 4 is arranged continuously or intermittently. The intermittent arrangement means that multiple sealing strips 4 are arranged in an array along the length direction of the sealing strip 4, and there is no connection between adjacent sealing strips 4. The sealing strip 4 under the intermittent arrangement only serves to press the diaphragm 1, so as to save the material used for the sealing strip 4. Under the continuous arrangement, the sealing strip 4 is an integral sealing strip 4, which has both the functions of sealing and pressing the diaphragm 1. The continuous or intermittent arrangement of the sealing strip 4 can be reasonably selected according to the sealing strength of a pair of gaskets.

[0060] In addition, referring to Figure 5 , the present invention also provides an electrolysis device, and the electrolysis device includes the above-mentioned electrolytic cell sealing component. The electrolysis device includes an extrusion mechanism 5, multiple electrolytic cells 6, multiple diaphragms 1 and multiple electrolytic cell sealing components; multiple electrolytic cells 6 are arranged in an array inside the extrusion mechanism 5; a diaphragm 1 and an electrolytic cell sealing component are arranged between adjacent electrolytic cells 6; in the circumferential direction of the diaphragm 1, the edge of the diaphragm 1 is correspondingly connected to multiple electrolytic cell sealing components, and the electrolytic cell sealing component is arranged between the electrolytic cell frames 61 of adjacent electrolytic cells 6; the extrusion mechanism 5 can extrude multiple electrolytic cells 6, multiple diaphragms 1 and multiple electrolytic cell sealing components along the array direction of the multiple electrolytic cells 6. In this embodiment, multiple electrolytic cells 6 are arranged in an array along the horizontal direction, and the extrusion mechanism 5 is internally provided with a push block, and the push block extrudes multiple electrolytic cells 6 along the horizontal direction to suspend the bottom ends of the multiple electrolytic cells 6, and electrolyte is supplied through the bottom tube openings of the electrolytic cells 6, and the electrolytic gas is discharged through the top tube openings of the electrolytic cells 6. The diaphragm 1 separates adjacent electrolytic cells 6 to prevent the electrolytic gas from leaking. In the circumferential direction of the electrolytic cell 6, that is, at the square edge position of the diaphragm 1, it is necessary to be sealed by the electrolytic cell sealing component to form a hemming seal of the diaphragm 1 to prevent the electrolyte from leaking out and the electrolytic gas from overflowing. By the way of the extrusion mechanism 5 extruding multiple electrolytic cells 6, multiple diaphragms 1 and multiple electrolytic cell sealing components, it is easy to disassemble and assemble multiple electrolytic cells 6, multiple diaphragms 1 and multiple electrolytic cell sealing components, which is convenient for maintenance and replacement. In the working state, with the horizontal pressure applied by the extrusion mechanism 5, the sealing strip 4 (or the pressing member 7), the diaphragm 1 and a pair of gaskets are pressed together, and high-performance sealing and stable connection of the edge of the diaphragm 1 are realized through a triple-sealing structure.

[0061] It should be understood that the above description of the specific embodiments of the present invention is only for explaining the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present invention should be covered by the protection scope of the present invention.

Claims

1. An electrolytic cell sealing component, the interior of which is press-fitted with the edge of a diaphragm (1), characterized in that The electrolytic cell sealing component includes a convex gasket (2) and a concave gasket (3) which are arranged in parallel and in contact with each other; A docking groove (31) is formed on the inner end surface of the concave gasket (3); A plurality of protrusions (21) are arranged on the inner end surface of the convex gasket (2); One end surface of the diaphragm (1) abuts against the docking groove (31), and the other end surface abuts against the protrusions (21).

2. The electrolytic cell sealing member according to claim 1, characterized in that, A sealing groove (32) communicating with the docking groove (31) is further formed on the concave gasket (3); The edge of the diaphragm (1) fits into the sealing groove (32); The electrolytic cell sealing component further includes a sealing strip (4) disposed in the sealing groove (32); The sealing strip (4) abuts against both the edge of the diaphragm (1) and the end surface of the convex gasket (2).

3. The electrolytic cell sealing member according to claim 2, wherein The part of the inner end surface of the concave gasket (3) where the docking groove (31) and the sealing groove (32) are not formed is a fitting surface (33); The protrusions (21) abut against the fitting surface (33).

4. The electrolytic cell sealing member according to claim 2, wherein A pressing member (7) is integrally arranged on the inner end surface of the convex gasket (2); The pressing member (7) presses the edge of the diaphragm (1) into the sealing groove (32).

5. The electrolytic cell sealing member according to any one of claims 2-4, characterized in that, The sum of the thickness of the protrusions (21) and the thickness of the diaphragm (1) is greater than the distance between the docking groove (31) and the inner end surface of the convex gasket (2).

6. The electrolytic cell sealing member according to any one of claims 2-4, characterized in that, The free end of the protrusions (21) is provided with a rounded chamfer.

7. The electrolytic cell sealing member according to any one of claims 2-4, characterized in that The sealing strip (4) includes rubber and tetrafluoro material.

8. The electrolytic cell sealing member according to any one of claims 2-4, characterized in that Along the length direction of the sealing strip (4), the sealing strip (4) is arranged continuously or intermittently.

9. An electrolysis device, characterized in that, The electrolytic device includes the electrolytic cell sealing component according to any one of claims 1-8.

10. The electrolysis device according to claim 9, characterized in that, The electrolytic device includes an extrusion mechanism (5), a plurality of electrolytic cells (6), a plurality of diaphragms (1), and a plurality of the electrolytic cell sealing components; A plurality of the electrolytic cells (6) are arranged in an array inside the extrusion mechanism (5); The diaphragm (1) and the electrolytic cell sealing component are arranged between adjacent electrolytic cells (6); In the circumferential direction of the diaphragm (1), the edge of the diaphragm (1) is correspondingly connected to a plurality of the electrolytic cell sealing components; The extrusion mechanism (5) can extrude a plurality of the electrolytic cells (6), a plurality of the diaphragms (1), and a plurality of the electrolytic cell sealing components along the array direction of the plurality of electrolytic cells (6).

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