Electrolytic bath

Abstract

The utility model discloses an electrolytic bath which comprises a first end plate, a second end plate, a middle polar plate, a plurality of electrolytic units and a tensioning component, at least part of the electrolytic units are arranged between the first end plate and the middle polar plate, and at least part of the electrolytic units are arranged between the second end plate and the middle polar plate; the tensioning components comprise a plurality of first tensioning components and a plurality of second tensioning components, the first tensioning components are detachably connected with the first end plate and the middle polar plate so as to tension the first end plate towards the middle polar plate, and the second tensioning components are detachably connected with the second end plate and the middle polar plate so as to tension the second end plate towards the middle polar plate; the first tensioning component is parallel to the second tensioning component, and the first tensioning component and the second tensioning component are arranged in a staggered mode in the circumferential direction. The left side and the right side of the electrolytic cell are independent, can be detached respectively and can be detached on site, the maintenance time and the maintenance cost are greatly shortened, and the performance failure risk of the tensioning component is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrolytic water hydrogen production technical field especially a kind of electrolytic cell. BACKGROUND

[0002] Common electrolytic water hydrogen production equipment on market, especially alkaline electrolytic cell, generally is bipolar filter-pressing structure. Alkaline electrolytic cell is composed of multiple electrolytic units, and each electrolytic unit includes main pole plate, pole frame, electrode net, diaphragm, gasket and the like. For large-scale alkaline electrolytic cell with hydrogen production capacity greater than 1000 Nm 3 / h, its electrolytic unit often exceeds 300, the length of entire electrolytic cell often exceeds 6 meters, height and width all exceed 2 meters, and weight exceeds 50 tons.

[0003] Currently, alkaline electrolytic cell generally realizes the separation and sealing of hydrogen side and oxygen side of each electrolytic unit by tensioning component (long stud, nut, disc spring and the like) compression fixation. Since the normal working temperature of electrolytic cell is about 85 DEG C, and its working temperature has certain randomness, when electrolytic cell is in starting and stopping process, the working temperature of internal parts and tensioning component of electrolytic cell fluctuates from room temperature to 85 DEG C, in this process, the sealing gasket of electrolytic cell will creep, thereby affecting sealing performance, and the fluctuation of working temperature will also affect the performance of tensioning component, leading to electrolytic cell leakage. For alkaline electrolytic cell with hydrogen production capacity 1000 Nm 3 / h, tensioning component generally uses 18 M68 tensioning studs, and the length of stud exceeds 6 meters, and the length-diameter ratio exceeds 80, leading to poor bending and torsion resistance of stud, and in long-time running and variable load process of electrolytic cell, the middle part electrolytic unit can appear sinking condition, leading to performance instability of tensioning stud, and in serious case, it will lead to sealing failure of electrolytic cell. Moreover, electrolytic cell is more applied in northwest and northeast regions rich in wind and light resources, and in winter, the temperature is as low as minus 20 DEG C, and in starting and stopping process of electrolytic cell, the thermal deformation amount of tensioning stud is large due to temperature change, and it also has great influence on performance.

[0004] In addition, when problems such as serious performance attenuation, insufficient gas purity, local short circuit in electrolytic cell occur in running process of electrolytic cell, generally, electrolytic cell needs to be returned to factory for overall disassembly and maintenance, and the disassembly and assembly work is complex, the workload is large, the maintenance period is long, and all sealing gaskets after disassembly cannot be reused, and the cost is high.

[0005] Therefore, it is necessary to provide a new electrolytic cell to solve the above problems. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a detachable electrolytic cell, reducing the performance failure risk of tensioning component, and improving the performance stability of electrolytic cell.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] An electrolytic cell comprises a first end plate, a second end plate, a middle polar plate, a plurality of electrolytic units, and a tensioning member, at least part of the electrolytic units are arranged between the first end plate and the middle polar plate, and at least part of the electrolytic units are arranged between the second end plate and the middle polar plate;

[0009] The tensioning member comprises a plurality of first tensioning members and a plurality of second tensioning members, the first tensioning members are detachably connected with the first end plate and the middle polar plate to tension the first end plate towards the middle polar plate, the second tensioning members are detachably connected with the second end plate and the middle polar plate to tension the second end plate towards the middle polar plate, the first tensioning members and the second tensioning members are parallel, and the first tensioning members and the second tensioning members are arranged in a circumferential direction.

[0010] As a further improved technical scheme of the utility model, the tensioning member comprises a screw rod, the first end plate and the second end plate are respectively provided with a first through hole and a second through hole, the middle polar plate is provided with a third through hole and a fourth through hole which are axially corresponding to the first through hole and the second through hole, the screw rod of the first tensioning member passes through the third through hole and the first through hole, the screw rod of the second tensioning member passes through the fourth through hole and the second through hole, and the third through hole and the fourth through hole are arranged alternately.

[0011] As a further improved technical scheme of the utility model, the tensioning member further comprises a disc spring and a nut, the screw rod comprises a head and a rod, the radial dimension of the head is larger than that of the rod, the disc spring and the nut pass through the rod in sequence, the disc spring abuts against one side of the first end plate away from the middle polar plate, and the nut compresses the disc spring.

[0012] As a further improved technical scheme of the utility model, the tensioning member further comprises a guide ring and a guide sleeve, the disc spring is sleeved on the outer periphery of the guide sleeve and axially abuts against the guide sleeve, the guide ring is sleeved into the tail of the guide sleeve and axially abuts against the other end of the disc spring, and the guide sleeve is sleeved on the outer periphery of the rod of the screw rod.

[0013] As a further improved technical scheme of the utility model, the electrolytic cell further comprises a connecting assembly, the connecting assembly is fixedly connected with a plurality of continuously arranged electrolytic units, the connecting assembly comprises a connecting plate and a connecting screw, and the electrolytic unit comprises a polar frame.

[0014] As a further improved technical scheme of the utility model, the bottom of the first end plate, the second end plate and the middle polar plate is supported by an insulating base.

[0015] As a further improved technical scheme of the present application, the electrolytic cell further comprises a support assembly, the support assembly is supported below the plurality of electrolytic units arranged in series, the support assembly comprises a support plate, the electrolytic unit comprises a pole frame, and the upper surface of the support plate is adapted to at least part of the lower contour of the pole frame.

[0016] One side of the pole frame fixedly connected with the sealing gasket is provided with a groove, and the diaphragm is at least partially fixed in the groove.

[0017] As a further improved technical scheme of the present application, the electrolytic cell further comprises a support assembly, the support assembly is supported below the plurality of electrolytic units arranged in series, the support assembly comprises a support plate, the electrolytic unit comprises a pole frame, and the upper surface of the support plate is adapted to at least part of the lower contour of the pole frame.

[0018] As a further improved technical scheme of the present application, the support assembly further comprises at least two groups of support adjusting assemblies arranged below the support plate, each group of the support adjusting assemblies comprises an upper support block, a lower support block, two middle support blocks and a support screw, the two middle support blocks are arranged between the upper support block and the lower support block, the support screw is fixedly connected with the two middle support blocks, and the upper support block is fixed with the support plate.

[0019] As a further improved technical scheme of the present application, the upper support block and the lower support block are respectively provided with a first inclined portion and a second inclined portion, the middle support block is provided with a third inclined portion and a fourth inclined portion adapted to the first inclined portion and the second inclined portion respectively, and the third inclined portion is at least partially attached to the first inclined portion and the fourth inclined portion is at least partially attached to the second inclined portion.

[0020] Compared with the prior art, the electrolytic cell has the following advantages: the electrolytic cell is divided into two independent parts from the middle pole plate, the first end plate and the second end plate at both ends are detachably connected to the middle pole plate through the first tensioning member and the second tensioning member and are tensioned towards the middle pole plate, when the electrolytic cell needs to be disassembled and repaired, it does not need to be returned to the factory, and can be disassembled and processed on site, greatly shortening the repair time and repair cost, and greatly reducing the performance failure risk of the tensioning member, which is beneficial to improve the performance stability of the electrolytic cell. The first tensioning member and the second tensioning member are arranged in a staggered manner in the circumferential direction, which reduces the pressure borne by the middle pole plate, thereby reducing the thickness of the middle pole plate and reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional structure schematic view of the electrolytic cell of a specific embodiment of the present application.

[0022] Figure 2 It is the exploded view of electrolytic cell of a specific embodiment of the utility model;

[0023] Figure 3 It is the structure diagram of the utility model, Figure 2 It is the enlarged structure diagram of A area in the middle,

[0024] Figure 4 It is the structure diagram of the utility model, Figure 2 It is the enlarged structure diagram of B area in the middle,

[0025] Figure 5 It is the exploded view of tensioning component of a specific embodiment of the utility model;

[0026] Figure 6 It is the assembly view of tensioning component of a specific embodiment of the utility model;

[0027] Figure 7 It is the structure diagram of intermediate polar plate of a specific embodiment of the utility model;

[0028] Figure 8 It is the structure diagram of the other side of intermediate polar plate of the utility model, Figure 7

[0029] Figure 9 It is the exploded view of electrolytic unit of a specific embodiment of the utility model;

[0030] Figure 10 It is the assembly view of diaphragm and polar frame of a specific embodiment of the utility model;

[0031] Figure 11 It is the enlarged structure diagram of C area in the middle of the utility model, Figure 10

[0032] Figure 12 It is the structure diagram of support assembly of a specific embodiment of the utility model;

[0033] Figure 13 It is the exploded view of support adjusting assembly of a specific embodiment of the utility model. DETAILED DESCRIPTION

[0034] ​​The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. If there are several embodiments, the features in these embodiments can be combined with each other in the case of no conflict. When the description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise specified. The description in the following exemplary embodiments does not represent all the embodiments consistent with the present application; rather, they are merely examples of devices, products and / or methods consistent with some aspects of the present application as recited in the claims of the present application.

[0035] The terms used in the present application are merely for the purpose of describing the embodiments and are not intended to limit the scope of the protection of the present application. The singular forms "a", "an" and "the" used in the specification and claims of the present application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0036] It should be understood that the terms "first", "second" and similar terms used in the description and claims of the present application do not denote any order, quantity or importance, but are merely used to distinguish features. Similarly, "one" or "a" and similar terms do not denote a quantity limitation, but mean that at least one exists. Unless otherwise indicated, the terms "front", "back", "up", "down" and similar terms appearing in the present application are intended to facilitate the description and are not limited to a particular position or a spatial orientation. The terms "include" or "contain" and similar terms are open-ended expressions, meaning that the elements appearing before "include" or "contain" encompass the elements appearing after "include" or "contain" and their equivalents, and do not exclude the possibility that the elements appearing before "include" or "contain" can also include other elements. If "several" appears in the present application, it means two or more.

[0037] Referring to Figures 1 to 13 As shown in the drawings, the present embodiment discloses an electrolytic cell, comprising a first end plate 11, a second end plate 12, a middle electrode plate 21, a plurality of electrolytic units 3 and a tensioning member 4, wherein at least part of the electrolytic units 3 are arranged between the first end plate 11 and the middle electrode plate 21, and at least part of the electrolytic units 3 are arranged between the second end plate 12 and the middle electrode plate 21, the tensioning member 4 comprises a plurality of first tensioning members 401 and a plurality of second tensioning members 402, the first tensioning members 401 are detachably connected to the first end plate 11 and the middle electrode plate 21 and are tensioned, and the second tensioning members 402 are detachably connected to the second end plate 12 and the middle electrode plate 21 and are tensioned. The electrolytic cell is independent on the left and right sides respectively, and can realize independent disassembly of unilateral electrolytic cell on site, saving maintenance cost and time cost.

[0038] Referring toFigure 1 、 Figure 2 and Figure 6 As shown in

[0039] Please refer to Figure 1 、 Figure 2 and Figure 6 , the bottom of the first end plate 11, the second end plate 12 and the intermediate plate 21 is supported by an insulating base 13, so that the intermediate plate 21 and the first end plate 11 and the second end plate 12 on both sides are lifted synchronously and supported on the ground, improving the support strength of the middle part of the electrolytic tank, which can effectively avoid the sinking of the middle part of the electrolytic tank and reduce the risk of electrolytic tank leakage.

[0040] Please refer to Figure 1 、 Figure 2 and Figure 6 , the first tensioning member 401 is parallel to the second tensioning member 402, and the first tensioning member 401 and the second tensioning member 402 are arranged in a circumferential direction. Interleaved, that is, any first tensioning member 401 and any second tensioning member 402 are not on the same straight line. By setting in this way, the pressure borne by the intermediate plate 21 can be reduced, and the interleaved arrangement of the first tensioning member 401 and the second tensioning member 402 can reduce the thickness of the intermediate plate 21 by half compared with the coaxial arrangement, thereby reducing the cost and weight.

[0041] Please refer to Figures 5 to 8As shown, the tensioning member 4 includes a screw rod 41, a disc spring 42 and a nut 43, the first end plate 11 is provided with a first through hole 111, the second end plate 12 is provided with a second through hole 121, and the intermediate plate 21 is provided with a third through hole 211 and a fourth through hole 212 which axially correspond to the first through hole 111 and the second through hole 121 respectively. The screw rod 41 of the first tensioning member 401 passes through the third through hole 211 and the first through hole 111, and the disc spring 42 and the nut 43 are screwed into the tail of the screw rod 41 in sequence to tighten the first end plate 11 towards the intermediate plate 21; the screw rod 41 of the second tensioning member 402 passes through the fourth through hole 212 and the second through hole 121, and the disc spring 42 and the nut 43 are screwed into the tail of the screw rod 41 in sequence to tighten the second end plate 12 towards the intermediate plate 21. Further, the third through hole 211 and the fourth through hole 212 are arranged alternately, the number of the third through hole 211 is equal to the number of the fourth through hole 212, that is, the first tensioning member 401 and the second tensioning member 402 are arranged alternately, and the number of the first tensioning member 401 is equal to the number of the second tensioning member 402. Further, the screw rod 41 of the first tensioning member 401 and the screw rod 41 of the second tensioning member 402 are of the same size, and the number of the electrolytic cells 3 on both sides of the intermediate plate 21 is the same. In this way, the electrolytic cell as a whole is symmetrical along the left and right sides of the intermediate plate 21, the stress on both sides of the intermediate plate 21 is balanced, the aspect ratio of the screw rod 41 is relatively reduced by half, the risk of performance failure of the screw rod 41 is greatly reduced, and the stability of the electrolytic cell is improved.

[0042] Please refer to Figures 6 to 8 As shown, the first tensioning member 401 is connected to the first end plate 11 and the intermediate plate 21, the screw rod 41 passes through the third through hole 211 of the intermediate plate 21 and the first through hole 111 of the first end plate 11 in sequence and abuts against the side of the intermediate plate 21 away from the first end plate 11, the disc spring 42 and the nut 43 are screwed into the tail of the screw rod 41 in sequence and the disc spring 42 abuts against the side of the first end plate 11 away from the intermediate plate 21, and the nut 43 compresses the disc spring 42 to make it in a compressed state. The second tensioning member 402 is connected to the second end plate 12 and the intermediate plate 21, the screw rod 41 passes through the fourth through hole 212 of the intermediate plate 21 and the second through hole 121 of the second end plate 12 in sequence and abuts against the side of the intermediate plate 21 away from the second end plate 12, the disc spring 42 and the nut 43 are screwed into the tail of the screw rod 41 in sequence and the disc spring 42 abuts against the side of the second end plate 12 away from the intermediate plate 21, and the nut 43 compresses the disc spring 42 to make it in a compressed state. In this way, the stress of the disc spring 42 and the nut 43 acts on the first end plate 11 and the second end plate 12 on both sides, reducing the force borne by the intermediate plate 21 and improving its support stability.

[0043] Further, please refer to Figures 5 to 8As shown, the screw rod 41 comprises a head portion 411 and a rod portion 412, the head portion 411 has a larger radial dimension than the rod portion 412, the third through hole 211 comprises an axially communicated first hole portion 2111 and a first countersunk groove 2112, the first countersunk groove 2112 has a larger radial dimension than the first hole portion 2111, the fourth through hole 212 comprises an axially communicated second hole portion 2121 and a second countersunk groove 2122, the second countersunk groove 2122 has a larger radial dimension than the second hole portion 2121. Specifically, the first hole portion 2111 and the second hole portion 2121 are both adapted to the rod portion 412, the first countersunk groove 2112 and the second countersunk groove 2122 are both adapted to the head portion 411, and the first countersunk groove 2112 is away from the first end plate 11 relative to the first hole portion 2111, the second countersunk groove 2122 is away from the second end plate 12 relative to the second hole portion 2121. The first countersunk groove 2112 is used to limit the head portion 411 of the screw rod 41 connecting the first end plate 11 and the intermediate pole plate 21, and the head portion 411 is located in the first countersunk groove 2112 and abuts against the groove bottom wall of the first countersunk groove 2112; the second countersunk groove 2122 is used to limit the head portion 411 of the screw rod 41 connecting the second end plate 12 and the intermediate pole plate 21, and the head portion 411 is located in the second countersunk groove 2122 and abuts against the groove bottom wall of the second countersunk groove 2122. In this way, the head portion 411 of the screw rod 41 is collected within the thickness of the intermediate pole plate 21, which facilitates disassembly and reduces the impact on other components during disassembly.

[0044] Preferably, the radial cross section of the head portion 411 of the screw rod 41 is provided in other shapes other than circular, and the first countersunk groove 2112 and the second countersunk groove 2122 are adaptively provided in corresponding shapes. In this embodiment, the radial cross section of the head portion 411 is square, i.e. the head portion 411 is a square column. In this way, when the head portion 411 is limited in the first countersunk groove 2112 or the second countersunk groove 2122, the screw rod 41 will not rotate any more, and then after the locking disc spring 42 and the nut 43 are locked, the entire first tensioning member 401 and the second tensioning member 402 can always remain fixed, thereby ensuring the sealing performance of the electrolytic cell and reducing the risk of leakage.

[0045] Please refer to Figure 5 and Figure 6 As shown, the tensioning member 4 further comprises a guide ring 44 and a guide sleeve 45, which are used to limit the assembly of the disc spring 42, the disc spring 42 is sleeved on the outer periphery of the guide sleeve 45 and axially abuts against the guide sleeve 45, the guide ring 44 is sleeved from the tail of the guide sleeve 45 and axially abuts against the other end of the disc spring 42, and the guide sleeve 45 is sleeved on the outer periphery of the rod portion 412 of the screw rod 41. Further, the other side of the guide ring 44 abuts against the first end plate 11 or the second end plate 12, and the other side of the guide sleeve 45 abuts against the nut 43.

[0046] Please refer to Figures 9 to 11As shown, the electrolytic unit 3 comprises a pole frame 31, a main pole plate 32, a cathode electrode net 33, an anode electrode net 34, a diaphragm 35 and a sealing gasket 36, the main pole plate 32 is fixed in the pole frame 31, and the anode electrode net 34, the diaphragm 35, the cathode electrode net 33 and the sealing gasket 36 are sequentially arranged on the same side of the main pole plate 32. Further, the anode electrode net 34 and the cathode electrode net 33 are fixed to the pole frame 31 by welding; the pole frame 31 is provided with a groove 311, and the diaphragm 35 is fixed to the pole frame 31 through the groove 311. Specifically, the groove 311 is trapezoidal, and the diaphragm 35 is at least partially fixed in the groove 311, the edge of the diaphragm 35 is at least partially arranged in the groove 311 and adheres to the inner wall of the groove, and then a sealing strip or glue is used to fill the groove 311 to press and fix the diaphragm 35, the sealing strip can be a rubber strip, a PTFE strip or an EPDM strip. The sealing gasket 36 can be fixed on the sealing surface of the pole frame 31 by pasting. In this embodiment, the groove 311 is arranged on the sealing surface of the pole frame 31. In this way, the cathode electrode net 33, the anode electrode net 34, the diaphragm 35 and the sealing gasket 36 can be prevented from falling off during disassembly of the electrolytic cell.

[0047] In this embodiment, insulation measures need to be taken between the first pole plate 22 and the first end plate 11, between the second pole plate 23 and the second end plate 12, and between the tensioning member 4 and the first end plate 11, the second end plate 12 and the intermediate pole plate 21, and insulation pads, insulation sleeves and insulation gaskets can be arranged to achieve the insulation.

[0048] As shown in Figure 2 and Figure 3 , the electrolytic cell of this embodiment further comprises a connecting assembly 5 for fixing and connecting the other electrolytic units 3 on both sides as a whole when the electrolytic unit 3 to be repaired or replaced is disassembled, thereby improving the overall stability and sealing performance. The connecting assembly 5 fixedly connects a plurality of continuously arranged electrolytic units 3, and the connecting assembly 5 comprises a connecting plate 51 and a connecting screw 52, the connecting plate 51 is attached to the pole frames 31 of the plurality of continuously arranged electrolytic units 3, and the connecting screw 52 screw-fixedly connects the connecting plate 51 and the pole frames 31.

[0049] As shown in Figure 2 , Figure 4 and Figure 12As shown, the electrolytic cell of the embodiment further comprises a support assembly 6 for supporting the electrolytic unit 3 upward from the bottom to prevent sagging when the electrolytic unit 3 needs to be disassembled for maintenance or replacement. The support assembly 6 comprises a support plate 61 and at least two sets of support adjusting assemblies 60, the upper surface of the support plate 61 is adapted to the at least partial lower contour of the polar frame 31 and abuts against the polar frame 31. The support adjusting assembly 60 is arranged below the support plate 61 to lift the support plate 61 to abut against the polar frame 31 of the electrolytic unit 3. Each set of support adjusting assemblies 60 comprises an upper support block 62, a lower support block 63, two middle support blocks 64 arranged between the upper support block 62 and the lower support block 63, and a support screw 65 fixedly connected to the two middle support blocks 64, and the middle support blocks 64 are provided with connecting holes 643 for the support screw 65 to connect. Further, the upper support block 62 is fixed to the support plate 61 to ensure the strength of the support assembly 6 and prevent displacement caused by slipping between the support plate 61 and the support adjusting assembly 60, which can be fixed by welding or the like.

[0050] As shown in Figure 12 and Figure 13 As shown, the support adjusting assembly 60 of the embodiment can be adjusted in height, the upper support block 62 is provided with a first inclined portion 621, the lower support block 63 is provided with a second inclined portion 631, the middle support block 64 is provided with a third inclined portion 641 and a fourth inclined portion 642 adapted to the first inclined portion 621 and the second inclined portion 631 respectively, and the third inclined portion 641 at least partially abuts against the first inclined portion 621 and the fourth inclined portion 642 at least partially abuts against the second inclined portion 631. In this way, the support adjusting assembly 60 realizes height adjustment through simple structural cooperation, ensures structural stability at a lower cost, and changes the overall height of the support assembly 6 by adjusting the relative positions of the middle support block 64, the upper support block 62 and the lower support block 63.

[0051] In the embodiment, the upper support block 62 and the lower support block 63 have the same structure and size, the first slope portion 621 and the second slope portion 631 have the same slope, and the third slope portion 641 and the fourth slope portion 642 have the same slope, which facilitates the manufacture and assembly. In the upper support block 62, the first slope portion 621 extends upward from the middle of the lower bottom wall of the upper support block 62, and two first slope portions 621 are symmetrically arranged; the lower support block 63 is the same, and the lower support block 63 is placed symmetrically with the upper support block 62. Further, the upper support block 62 and the lower support block 63 further comprise a first side wall 622 and a second side wall 632, respectively, the distance between the two first side walls 622 corresponding to the same first slope portion 621 of the upper support block 62 is equal to the width of the middle support block 64, and the lower edge of the first side wall 622 is flush with the lower bottom wall of the upper support block 62; the second side wall 632 is the same. In this way, the assembly between the middle support block 64 and the upper support block 62 and the lower support block 63 is facilitated, and the middle support block 64 is limited to avoid unnecessary displacement, and can only move in the slope direction of the first slope portion 621 and the second slope portion 631, with high stability.

[0052] In the embodiment, the support assembly 6 comprises a support plate 61 and three support adjusting assemblies 60, the length of the support plate 61 is equivalent to the distance between the first end plate 11 or the second end plate 12 and the side of the intermediate polar plate 21 close to each other, and the three support adjusting assemblies 60 are uniformly and spacedly arranged below the support plate 61, thereby providing effective support for the electrolytic unit 3 located on the side when the single-side electrolytic cell is disassembled. The support assembly 6 adopts a steel structure, that is, the support plate 61, the upper support block 62, the lower support block 63 and the middle support block 64 are all made of steel material to ensure the strength of the support assembly 6. Each support adjusting assembly 60 comprises two support screws 65.

[0053] When the electrolytic cell of the embodiment has a leakage, a short circuit, an abnormal voltage and the like, first, the position of the electrolytic cell fault is confirmed, and one or two screws 41 at the bottom of the side of the intermediate polar plate 21 close to the first end plate 11 or the side of the intermediate polar plate 21 close to the second end plate 12 where the fault occurs is removed. After the bottom screw 41 is removed, the support assembly 6 is installed, the support assembly 6 is placed below the electrolytic unit 3, the position of the middle support block 64 is adjusted to ensure that the height of the support assembly 6 is appropriate, the bottom of the polar frame 31 is ensured to be attached to the support plate 61, and the electrolytic unit 3 is prevented from sagging or falling. On both sides of the electrolytic unit 3 that needs to be repaired and disassembled, the polar frame 31 of the electrolytic unit 3 on both sides is connected and fixed by the connecting assembly 5. Then, the upper screw 41 on the side of the fault is removed, and the remaining screws 41 are loosened, so as to remove the electrolytic unit 3 that needs to be repaired or replaced. After the repair is completed, the electrolytic unit 3 is reinstalled, and all the screws 41 are tightened. Finally, the connecting assembly 5 is removed and the bottom support assembly 6 is disassembled, that is, the fault processing is completed.

[0054] In summary, compared with the prior art, the electrolytic cell has the following advantages: the electrolytic cell is divided into two independent parts from the middle pole plate 21, the first end plate 11 and the second end plate 12 at both ends are respectively detachably connected with the middle pole plate 21 through the first tensioning member 401 and the second tensioning member 402 and are tensioned towards the middle pole plate 21, when the electrolytic cell needs to be disassembled and repaired, it does not need to be returned to the factory, and can be disassembled and processed on site, greatly shortening the repair time and repair cost, and greatly reducing the performance failure risk of the tensioning member 4, which is beneficial to improve the performance stability of the electrolytic cell. The first tensioning member 401 and the second tensioning member 402 are arranged in a circumferential direction, which reduces the pressure borne by the middle pole plate 21, and thus the thickness of the middle pole plate 21 can be reduced, thereby reducing the cost. When the electrolytic cell is disassembled and repaired, the intact electrolytic unit 3 is connected and fixed by the connecting assembly 5 to improve the structural stability and ensure the sealing of the remaining electrolytic unit 3, and the support assembly 6 is used to support the electrolytic unit 3 below to provide effective support for the electrolytic unit 3 that loses tension.

[0055] The above embodiments are only used to illustrate the utility model and not to limit the technical solutions described in the utility model, and the understanding of the specification should be based on the technical personnel in the technical field, although the utility model has been described in detail with reference to the above-mentioned embodiments, but the ordinary technical personnel in the art should understand that the technical personnel in the technical field can still modify or equivalently replace the utility model, and all technical solutions and improvements that do not deviate from the spirit and scope of the utility model should be covered in the scope of the claims of the utility model.

Claims

1. An electrolytic cell characterized by: The electrolytic cell comprises a first end plate (11), a second end plate (12), a middle plate (21), a plurality of electrolytic units (3), and a tensioning member (4), at least part of the electrolytic units (3) are arranged between the first end plate (11) and the middle plate (21), and at least part of the electrolytic units (3) are arranged between the second end plate (12) and the middle plate (21); The tensioning member (4) comprises a plurality of first tensioning members (401) and a plurality of second tensioning members (402), the first tensioning members (401) are detachably connected with the first end plate (11) and the middle plate (21) to tension the first end plate (11) towards the middle plate (21), the second tensioning members (402) are detachably connected with the second end plate (12) and the middle plate (21) to tension the second end plate (12) towards the middle plate (21), the first tensioning members (401) and the second tensioning members (402) are parallel, and the first tensioning members (401) and the second tensioning members (402) are arranged in a circumferential direction.

2. The electrolytic cell of claim 1, wherein: The tensioning member (4) comprises a screw rod (41), the first end plate (11) and the second end plate (12) are respectively provided with a first through hole (111) and a second through hole (121), the middle plate (21) is provided with a third through hole (211) and a fourth through hole (212) corresponding to the first through hole (111) and the second through hole (121) in an axial direction, the screw rod (41) of the first tensioning member (401) passes through the third through hole (211) and the first through hole (111), the screw rod (41) of the second tensioning member (402) passes through the fourth through hole (212) and the second through hole (121), and the third through hole (211) and the fourth through hole (212) are arranged alternately.

3. The electrolytic cell of claim 2, wherein: The tensioning member (4) further comprises a disc spring (42) and a nut (43), the screw rod (41) comprises a head portion (411) and a rod portion (412), the radial dimension of the head portion (411) is greater than the radial dimension of the rod portion (412), the disc spring (42) and the nut (43) pass through the rod portion (412) in sequence, the disc spring (42) abuts against a side of the first end plate (11) away from the middle plate (21), and the nut (43) compresses the disc spring (42).

4. The electrolytic cell of claim 3, wherein: The tensioning member (4) further comprises a guide ring (44) and a guide sleeve (45), the disc spring (42) is sleeved on the outer periphery of the guide sleeve (45) and axially abuts against the guide sleeve (45), the guide ring (44) is sleeved on the tail of the guide sleeve (45) and axially abuts against the other end of the disc spring (42), and the guide sleeve (45) is sleeved on the outer periphery of the rod portion (412) of the screw rod (41).

5. The electrolytic cell of claim 1, wherein: The electrolytic cell further comprises a connecting assembly (5) fixedly connecting a plurality of the electrolytic units (3) arranged in series, the connecting assembly (5) comprising a connecting plate (51) and a connecting screw (52), the electrolytic unit (3) comprising a pole frame (31), the connecting screw (52) screwing the connecting plate (51) and the pole frame (31) together.

6. The electrolytic cell of claim 1, wherein: The first end plate (11), the second end plate (12) and the bottom of the intermediate pole plate (21) are all supported by an insulating base (13).

7. The electrolytic cell of claim 1, wherein: The electrolytic unit (3) comprises a pole frame (31), a main pole plate (32), a cathode electrode net (33), an anode electrode net (34), a diaphragm (35) and a sealing gasket (36), the main pole plate (32) being fixed in the pole frame (31), the anode electrode net (34), the diaphragm (35), the cathode electrode net (33) and the sealing gasket (36) being arranged on the same side of the main pole plate (32) in sequence, the sealing gasket (36) being fixedly connected with the pole frame (31). One side of the pole frame (31) fixedly connected with the sealing gasket (36) is provided with a groove (311), and the diaphragm (35) is at least partially fixed in the groove (311).

8. The electrolytic cell of claim 1, wherein: The electrolytic cell further comprises a supporting assembly (6) supporting the plurality of the electrolytic units (3) arranged in series from below, the supporting assembly (6) comprising a supporting plate (61), the electrolytic unit (3) comprising a pole frame (31), and the upper surface of the supporting plate (61) being adapted to at least part of the lower contour of the pole frame (31).

9. The electrolytic cell of claim 8, wherein: The supporting assembly (6) further comprises at least two groups of supporting adjusting assemblies (60) arranged below the supporting plate (61), each group of the supporting adjusting assemblies (60) comprising an upper supporting block (62), a lower supporting block (63), two middle supporting blocks (64) and a supporting screw (65), the two middle supporting blocks (64) being arranged between the upper supporting block (62) and the lower supporting block (63), the supporting screw (65) being fixedly connected with the two middle supporting blocks (64), and the upper supporting block (62) being fixed with the supporting plate (61).

10. The electrolytic cell of claim 9, wherein: The upper supporting block (62) and the lower supporting block (63) are respectively provided with a first inclined portion (621) and a second inclined portion (631), and the middle supporting block (64) is provided with a third inclined portion (641) and a fourth inclined portion (642) adapted to the first inclined portion (621) and the second inclined portion (631) respectively, the third inclined portion (641) being at least partially fitted with the first inclined portion (621) and the fourth inclined portion (642) being at least partially fitted with the second inclined portion (631).

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