Sectional type tensioning structure for electrolytic bath

Abstract

The sectional type tensioning structure is characterized in that a plurality of pole frames are axially arranged and axially compressed through a positive end pressing plate and a negative end pressing plate, one or a plurality of middle frames are axially arranged among the pole frames at intervals, the middle frames radially extend to protrude out of the outer contours of the pole frames, and the outer contours of the middle frames extend out of the outer contours of the pole frames. The radial outer edges of the middle frame, the positive end pressing plate and the negative end pressing plate form spaced fixing parts, and every two adjacent fixing parts are fixed and tensioned through a tensioning mechanism. The sectional type connection mode can disperse pressure and pulling force borne by each small chamber pole frame, effectively prevents the pole plates and the gaskets from drooping, reduces risks of pole plate dislocation and sealing failure, and improves stability and reliability of the electrolytic cell.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production electrolyzers, and in particular to a segmented tensioning structure for electrolyzers. Background Technology

[0002] Currently, large-scale alkaline water electrolysis equipment is widely used in industrial hydrogen production. The electrolyzer is the core component of this type of equipment, consisting of hundreds of small chambers, each composed of several to hundreds of electrode plates depending on the amount of hydrogen produced. Traditional electrolyzers use end plates, tension bolts, disc springs, and nuts to press the electrode plates together, with sealing gaskets providing friction between the plates to prevent sagging. However, with variations in electrolyzer length and electrode thickness, and the influence of multiple factors such as thermal expansion and contraction, existing technologies face several problems that urgently need to be addressed or improved.

[0003] First, the gaskets at the ends are prone to thinning and creeping extrusion, while the electrodes and gaskets in the middle are prone to sagging. These problems exacerbate the risk of electrode misalignment and seal failure, thus affecting the safe operation of the electrolytic cell. Second, the existing tensioning and fixing method has a relatively simple structure, with the entire structure interconnected. During maintenance, the entire electrolytic cell must be disassembled, which may damage fragile components such as gaskets and electrodes, resulting in cumbersome maintenance procedures and extremely high costs. Summary of the Invention

[0004] Purpose of this utility model: This utility model requests protection for a segmented tensioning structure for an electrolytic cell. By setting a middle frame to connect the electrolytic cell in segments, the pressure and tension on each small chamber electrode frame can be distributed, effectively preventing the electrode plates and gaskets from sagging.

[0005] Technical solution: The electrolytic cell segmented tensioning structure provided by this utility model has multiple electrode frames arranged axially and axially pressed by positive end pressure plate and negative end pressure plate. One or more middle frames are axially spaced between the electrode frames. The middle frames extend radially outward to protrude from the outer contour of the electrode frames. The radial outer edges of the middle frames, positive end pressure plate and negative end pressure plate form spaced fixing parts. Adjacent fixing parts are fixed and tensioned by a tensioning mechanism.

[0006] Furthermore, the tensioning mechanism is provided in multiple circumferentially spaced positions on the fixing part to fasten the pole frame at multiple angular positions.

[0007] Furthermore, the tensioning mechanisms at adjacent axial positions are circumferentially staggered and fixed.

[0008] Furthermore, the tensioning mechanism includes a screw, a first nut, and a second nut. Adjacent fixing parts have corresponding screw holes. The screw passes through the screw hole and extends out at both ends. The first nut and the second nut are tightened at both ends respectively.

[0009] Furthermore, the bottom of the positive end pressure plate and the negative end pressure plate extend to form a support frame.

[0010] Furthermore, the outer periphery of the middle frame is provided with an electrolyte solution inlet, and the outer ends of the positive end pressure plate and the negative end pressure plate are provided with electrolyte solution outlets. After entering, the electrolyte solution is evenly distributed to both sides and finally flows out through the outlets on the positive and negative sides.

[0011] Furthermore, the pole frame, positive end pressure plate, negative end pressure plate, and axial pressing part of the middle frame are all provided with sealing water lines.

[0012] Beneficial effects: Compared with the prior art, the advantages of this utility model are:

[0013] 1. The segmented connection can distribute the pressure and tension on each small cell electrode frame, effectively preventing the electrode plates and gaskets from sagging, reducing the risk of electrode plate misalignment and sealing failure, and improving the stability and reliability of the electrolytic cell.

[0014] 2. The fixed structure is simple, requiring no complex support or tensioning fixtures, and can be adapted to electrolytic cells of different models, weights, and sizes, exhibiting good versatility;

[0015] 3. By dispersing pressure and tension, the service life of the electrolyzer is extended, and the efficiency and capacity of electrolytic hydrogen production are improved;

[0016] 4. When a small cell malfunctions, only the electrolytic cell in that area needs to be disassembled for repair, simplifying the repair procedure and greatly reducing repair costs. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional view of the present invention. Detailed Implementation

[0019] like Figure 1 and 2 The electrolytic cell shown uses a segmented tensioning structure, with multiple pole frames 1 arranged axially and axially pressed by positive end pressure plate 2 and negative end pressure plate 3. The internal functional components and electrolysis principle of the electrolytic cell all adopt existing technology, which will not be described in detail here.

[0020] A middle frame 4 is provided at the axial center of the stacked pole frames 1. The middle frame 4 extends radially out of the outer contour of the pole frame 1. The radial outer edges of the middle frame 4, the positive end pressure plate 2, and the negative end pressure plate 3 form spaced fixing parts 5. Adjacent fixing parts 5 are fixed and tightened by a tensioning mechanism, that is, the positive end pressure plate 2 is fixed to the middle frame 4, and at the same time, the middle frame 4 is fixed to the negative end pressure plate 3.

[0021] Multiple tensioning mechanisms are arranged at circumferential intervals in the fixed part 5, and the tensioning mechanisms at axially adjacent positions are circumferentially staggered and fixed, that is, their angular positions are staggered.

[0022] The tensioning mechanism includes a screw 601, a first nut 602 and a second nut 603. Adjacent fixing parts 5 have corresponding screw holes. The screw 601 passes through the screw hole and extends out at both ends. The first nut 602 and the second nut 603 are tightened at both ends respectively.

[0023] The bottom of the positive end pressure plate 2 and the negative end pressure plate 3 extend to form a support frame 7, which supports the entire electrolytic cell.

[0024] The outer periphery of the middle frame 4 is provided with an electrolyte solution inlet 8, and the outer ends of the positive end pressure plate 2 and the negative end pressure plate 3 are provided with electrolyte solution outlets. After entering, the electrolyte solution is evenly distributed to both sides and finally flows out through the outlets on the positive and negative sides.

[0025] To ensure the sealing of the axial installation, the pole frame 1, the positive end pressure plate 2, the negative end pressure plate 3, and the middle frame 4 are all equipped with sealing water lines 9 for the axial pressing part.

[0026] In this embodiment, the middle frame 4 is not limited to one; two or more middle frames can be set. When multiple middle frames 4 are set, the positive end pressure plate 2 and the negative end pressure plate 3 are fixed to the middle frames adjacent to them respectively, and all middle frames are fixed to each other in pairs.

[0027] In this application, the electrolytic cell is divided into left and right sides or multiple axial sections, which are cross-fixed by a tensioning mechanism without the need for disc springs. By utilizing the principle that the internal temperature and pressure of the electrolytic cell are equal, the electrolytic cell can achieve self-locking under different working conditions. This eliminates the need for disc springs, which are structurally important, heavy, costly, and prone to failure in conventional electrolytic cells, and greatly increases the flexibility of installation and disassembly.

Claims

1. A segmented tensioning structure for an electrolytic cell, a plurality of pole frames (1) are arranged axially and axially compressed by a positive end pressing plate (2) and a negative end pressing plate (3), characterized in that: One or more middle frames (4) are axially spaced between the pole frames (1). The middle frames (4) extend radially out of the outer contour of the pole frames (1). The radial outer edges of the middle frames (4), the positive end pressure plate (2), and the negative end pressure plate (3) form spaced fixing parts (5). The adjacent fixing parts (5) are fixed and tightened by a tensioning mechanism.

2. The segmented tensioning structure for an electrolytic cell according to claim 1, characterized in that: Multiple tensioning mechanisms are arranged at circumferential intervals on the fixing part (5).

3. The segmented tensioning structure for an electrolytic cell of claim 1, wherein: The tensioning mechanisms at adjacent axial positions are fixed in a circumferentially staggered manner.

4. The segmented tensioning structure for an electrolyzer of claim 1, wherein: The tensioning mechanism includes a screw (601), a first nut (602), and a second nut (603). Adjacent fixing parts (5) have corresponding screw holes. The screw (601) passes through the screw hole and extends out at both ends. The first nut (602) and the second nut (603) are tightened at both ends respectively.

5. The segmented tensioning structure for an electrolytic cell of claim 1, wherein: The bottom of the positive end pressure plate (2) and the negative end pressure plate (3) extend to form a support frame (7).

6. The segmented tensioning structure for an electrolyzer of claim 1, wherein: The outer periphery of the middle frame (4) is provided with an electrolyte solution inlet (8), and the outer ends of the positive end pressure plate (2) and the negative end pressure plate (3) are provided with electrolyte solution outlets.

7. The segmented tensioning structure for an electrolytic cell of claim 1, wherein: The axial pressing parts of the pole frame (1), positive end pressure plate (2), negative end pressure plate (3) and middle frame (4) are all provided with sealing water lines (9).

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