An alkaline electrolyzer having a wedge-shaped fastening end plate

Abstract

The utility model relates to a kind of alkaline electrolytic cell, specifically a kind of wedge fastening end plate whole alkaline electrolytic cell, including wedge sleeve, and its setting in the two end plate bodies of the inner ring of wedge sleeve, and the electrolytic cell unit of multilayer stacking between two the end plate bodies, the utility model: through the end plate with wedge-shaped protrusion on both sides and internal electrolytic cell unit, and the matching wedge-shaped groove sleeve;The sleeve is pushed into along axial direction when assembling, and the quick self-centering and neat positioning of electrolytic cell whole are realized using wedge-shaped structure, effectively improve assembly accuracy;Rotatable insertion rod is equipped with at the both ends of sleeve, can be accurately inserted into the positioning slot of end plate after rotating, realize mechanical interlocking;Subsequently, axial pre-tightening force is applied by the synchronous rotation of both sides insertion rod, realize the uniform compression of electrolytic cell whole;The structure significantly improves assembly efficiency and overall structural rigidity, while enhancing sealing performance and operating stability.

Description

Technical Field

[0001] This utility model relates to an alkaline electrolytic cell, specifically an alkaline electrolytic cell with an integral wedge-shaped fastening end plate. Background Technology

[0002] An alkaline electrolyzer is a device that uses potassium hydroxide (KOH) or sodium hydroxide (NaOH) aqueous solution as electrolyte. By passing a direct current through it, water molecules undergo an oxidation-reduction reaction on the electrode surface, thereby realizing the production of hydrogen by water decomposition (hydrogen is produced at the cathode and oxygen is produced at the anode). It is one of the most technologically mature and widely used electrolytic water hydrogen production devices in industrial applications.

[0003] The core stack of an electrolyzer consists of dozens of repeatedly stacked basic electrolyzer units (including bipolar plates, electrodes, and diaphragms), which are compressed together by strong end plates and tie rods at both ends under enormous pressure to form a compact, stable, high-pressure unit. This modular stacking design greatly improves gas production efficiency and power density, while the end plates are responsible for evenly distributing the compression force to ensure stack sealing, prevent gas leakage, and provide integrated interfaces for the inlet and outlet of current and fluids. It is the key structural foundation for realizing the large-scale, high-performance commercial application of electrolyzers.

[0004] In traditional electrolytic cell assembly, problems such as component misalignment and poor sealing consistency due to insufficient alignment accuracy are common. These issues often rely on manual adjustment or bulky external clamps for fixing, resulting in low efficiency and uneven clamping force distribution. Common bolt fastening methods are not only cumbersome to operate and dependent on experience for preload control, but are also prone to loosening due to thermal cycling and vibration, leading to electrolyte leakage, increased contact resistance, and performance degradation. Furthermore, the lack of an effective integrated locking and self-aligning structure limits the improvement of the overall rigidity and operational stability of the electrolytic cell, making it difficult to meet the assembly quality and reliability requirements of high-performance electrolysis systems. Utility Model Content

[0005] The purpose of this invention is to provide an alkaline electrolytic cell with an integral wedge-shaped fastening end plate to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An alkaline electrolytic cell with integral wedge-shaped fastening end plates includes a wedge-shaped sleeve, two end plate bodies disposed within the inner ring of the wedge-shaped sleeve, and an electrolytic cell unit stacked in multiple layers between the two end plate bodies. Both ends of the two end plate bodies and the multi-layered electrolytic cell unit have wedge-shaped protrusions. Both ends of the wedge-shaped sleeve have wedge-shaped grooves. The wedge-shaped grooves of the wedge-shaped sleeve fit into the wedge-shaped protrusions of the two end plate bodies and the multi-layered electrolytic cell unit. Both ends of the wedge-shaped sleeve are provided with slots and sliding guide components fixedly installed on the slots. The sliding guide components are connected to an elastic retractable mechanism and a plug-in mechanism fixedly installed on the elastic retractable mechanism. The elastic retractable mechanism is provided with a transmission mechanism.

[0008] The alkaline electrolytic cell with the wedge-shaped fastening end plate as described above: the sliding guide assembly includes two slide rails connected to the slot and an arc-shaped groove opened on the slide rails, and two sliding supports are slidably installed on the slide rails.

[0009] The alkaline electrolytic cell with the wedge-shaped fastening end plate as described above: the elastic retractable mechanism includes a spring connected to the sliding support and a sliding block slidably mounted on the sliding support, the sliding block abutting against the spring.

[0010] The alkaline electrolytic cell with the wedge-shaped fastening end plate as described above: the elastic retractable mechanism further includes a fixing ring connected to one end of the sliding block and a plug rod connected to the fixing ring, and the two fixing rings are provided with the same internal threaded slider.

[0011] As described above, the alkaline electrolytic cell with wedge-shaped fastening end plates consists of two wedge-shaped protrusions on the end plate bodies, each with a positioning groove. The insertion rods at one end of the four internally threaded sliders are respectively inserted into the positioning grooves on the wedge-shaped protrusions of the two end plate bodies.

[0012] The alkaline electrolytic cell with the wedge-shaped fastening end plate as described above: two bidirectional screws are threadedly connected between the four internal threaded sliders. The bidirectional screws pass through the two internal threaded sliders distributed on both sides of the wedge-shaped sleeve, and a knob is provided at one end of the bidirectional screw.

[0013] The alkaline electrolytic cell with the wedge-shaped fastening end plate as described above: the transmission mechanism includes a transverse support frame connected to two internally threaded sliders on the same side, and a rotating disk is provided on the transverse support frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The electrolytic cell unit consists of end plates with wedge-shaped protrusions on both sides and an internal electrolytic cell unit, along with a matching wedge-shaped groove sleeve. During assembly, the sleeve is pushed in axially, and the wedge structure enables the electrolytic cell to achieve rapid self-centering and neat positioning, effectively improving assembly accuracy. Rotatable insert rods are provided at both ends of the sleeve, which can be precisely inserted into the pre-set positioning grooves on the end plates after rotation, achieving mechanical interlocking. Subsequently, axial preload is applied by the synchronous screwing of the insert rods on both sides, achieving uniform compression of the entire electrolytic cell. This structure significantly improves assembly efficiency and overall structural rigidity, while also enhancing sealing performance and operational stability.

[0016] This utility model, through the synchronous pre-tightening operation of the two-side insert rod structure towards the middle, can apply a uniform and controllable axial pre-tightening force to the entire electrolytic cell. This pre-tightening force can be transmitted to the sealing interface between the end plate and the electrolytic cell, ensuring that the sealing components such as gaskets and sealing rings are fully compressed, significantly improving the fit of the sealing interface, effectively avoiding the risk of electrolyte leakage. At the same time, uniform pre-tightening can avoid deformation of the end plate or electrolytic cell caused by local stress concentration, thus extending the service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an alkaline electrolytic cell with wedge-shaped fastening end plates.

[0018] Figure 2 This is a schematic diagram of the assembly state structure of an alkaline electrolytic cell with a wedge-shaped fastening end plate as the whole.

[0019] Figure 3 This is a schematic diagram of the assembly state of the entire alkaline electrolytic cell with wedge-shaped fastening end plates from another angle.

[0020] Figure 4 This is a schematic diagram of the structure of an alkaline electrolytic cell after the end plate is fixed, which is a whole structure of wedge-shaped fastening end plate.

[0021] Figure 5 This is a schematic diagram of the structure of an alkaline electrolytic cell before the end plate is fixed, which is an integral part of the wedge-shaped fastening end plate.

[0022] Figure 6 This is a schematic diagram of a wedge-shaped sleeve structure in an alkaline electrolytic cell, which is an integral part of a wedge-shaped fastening end plate.

[0023] Figure 7 A schematic diagram of the sliding guide assembly, insertion mechanism, and transmission mechanism in an alkaline electrolytic cell with a wedge-shaped fastening end plate as the whole.

[0024] Figure 8 A schematic diagram of the slide rail, transmission mechanism, and elastic retractable mechanism in an alkaline electrolytic cell with a wedge-shaped fastening end plate.

[0025] Figure 9This is a schematic diagram of the elastic retractable mechanism in an alkaline electrolytic cell with a wedge-shaped fastening end plate.

[0026] Figure 10 This is a schematic diagram of the internal structure of the wedge-shaped sleeve in an alkaline electrolytic cell, which is an integral part of the wedge-shaped fastening end plate.

[0027] In the diagram: 1. Wedge sleeve; 2. Wedge groove; 3. Slot; 4. End plate body; 5. Electrolytic cell unit; 6. Positioning groove; 7. Slide rail; 8. Sliding support; 9. Spring; 10. Sliding block; 11. Fixing ring; 12. Internal threaded slider; 13. Connecting rod; 14. Arc groove; 15. Two-way lead screw; 16. Knob; 17. Transverse support frame; 18. Rotating disk. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Please see Figures 1-10 As an embodiment of this utility model, the alkaline electrolytic cell with the wedge-shaped fastening end plate as a whole includes a wedge-shaped sleeve 1, two end plate bodies 4 disposed in the inner ring of the wedge-shaped sleeve 1, and an electrolytic cell unit 5 stacked in multiple layers between the two end plate bodies 4. Both ends of the two end plate bodies 4 and the multi-layer stacked electrolytic cell unit 5 are designed with wedge-shaped protrusions. Both ends of the wedge-shaped sleeve 1 are wedge-shaped grooves 2. The wedge-shaped grooves 2 of the wedge-shaped sleeve 1 fit into the wedge-shaped protrusions of the two end plate bodies 4 and the multi-layer stacked electrolytic cell unit 5. Both ends of the wedge-shaped sleeve 1 are provided with slots 3 and sliding guide components fixedly installed on the slots 3. The sliding guide components are connected to an elastic retractable mechanism and a plug-in mechanism fixedly installed on the elastic retractable mechanism. The elastic retractable mechanism is provided with a transmission mechanism.

[0030] In this embodiment, the electrolytic cell unit 5, with wedge-shaped protrusions on both sides of the end plate body 4 and the matching wedge sleeve 1 are used. The wedge sleeve 1 is pushed in axially during assembly, and the wedge structure enables the electrolytic cell to quickly self-align and neatly position itself, effectively improving assembly accuracy. The wedge sleeve 1 has rotatable insertion mechanisms at both ends. After rotation, the insertion mechanisms can be precisely inserted into the positioning slots 6 of the end plate body 4 to achieve mechanical interlocking. At this time, the insertion mechanisms on both sides can be driven by the transmission mechanism to move closer to each other, thereby tightening the entire electrolytic cell. The axial preload is applied by the synchronous rotation of the insertion mechanisms on both sides, thereby achieving uniform compression of the entire electrolytic cell. This structure significantly improves assembly efficiency and overall structural rigidity, while also enhancing sealing performance and operational stability.

[0031] As a further embodiment of this utility model, the sliding guide assembly includes two slide rails 7 connected to the slot 3 and an arc-shaped groove 14 formed on the slide rails 7, and two sliding supports 8 are slidably installed on the slide rails 7.

[0032] In this embodiment, there are a total of four sets of slide rails 7, which are distributed in pairs at both ends of the wedge sleeve 1. The slide rails 7 are provided with arc grooves 14, and two sliding supports 8 are slidably installed on each slide rail 7.

[0033] As a further embodiment of this utility model, the elastic retractable mechanism includes a spring 9 connected to the sliding support 8 and a sliding block 10 slidably mounted on the sliding support 8, wherein the sliding block 10 abuts against the spring 9.

[0034] In this embodiment, a sliding block 10 is slidably mounted on the sliding support 8, and a spring 9 provides an elastic restoring force to the sliding block 10.

[0035] As a further embodiment of this utility model, the elastic retractable mechanism further includes a fixing ring 11 connected to one end of the sliding block 10 and a plug rod 13 connected to the fixing ring 11, and a common internal thread slider 12 is provided between the two fixing rings 11.

[0036] In this embodiment, the fixing ring 11 is fixed to the plug rod 13, and the two fixing rings 11 are distributed at both ends of the internal thread slider 12, and the plug rod 13 is fixed to the internal thread slider 12.

[0037] As a further embodiment of this utility model, positioning grooves 6 are provided on the wedge-shaped protrusions of the two end plate bodies 4, and the insertion rods 13 at one end of the four internal thread sliders 12 are respectively inserted into the positioning grooves 6 provided on the wedge-shaped protrusions of the two end plate bodies 4.

[0038] In this embodiment, positioning grooves 6 are provided on the end plate bodies 4 at both ends, and the positioning grooves 6 cooperate with the plug rods 13.

[0039] As a further embodiment of this utility model, two bidirectional lead screws 15 are threadedly connected between the four internal thread sliders 12. The bidirectional lead screws 15 pass through the two internal thread sliders 12 distributed on both sides of the wedge sleeve 1, and a knob 16 is provided at one end of the bidirectional lead screw 15.

[0040] In this embodiment, there are two bidirectional lead screws 15, and four internal threaded sliders 12 are respectively threaded onto the two bidirectional lead screws 15. The bidirectional lead screws 15 can be rotated by rotating the knob 16.

[0041] As a further embodiment of this utility model, the transmission mechanism includes a transverse support frame 17 connected to two internally threaded sliders 12 on the same side, and a rotating disk 18 is provided on the transverse support frame 17.

[0042] In this embodiment, when the wedge sleeve 1 is pushed back axially during assembly, the lateral support frame 17 is deflected by the torsion rotating disk 18. At this time, the four internal threaded sliders 12 move in the same direction. Subsequently, the four plug rods 13 pass through the positioning grooves 6 on the two end plate bodies 4 respectively, realizing mechanical interlocking. At this time, by rotating the bidirectional lead screw 15, the bidirectional lead screw 15 drives the two internal threaded sliders 12 to move closer to each other. At this time, the two internal threaded sliders 12 move inward and tighten respectively. The sliding block 10 slides on the sliding support 8 and compresses the spring 9, which can apply axial preload to the end plate bodies 4 on both sides, realizing uniform pressing of the entire electrolytic cell. This structure significantly improves the assembly efficiency and overall structural rigidity, while enhancing the sealing performance and operational stability.

[0043] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. An alkaline electrolytic cell with integral wedge-shaped fastening end plates, comprising a wedge-shaped sleeve (1), two end plate bodies (4) disposed in the inner ring of the wedge-shaped sleeve (1), and an electrolytic cell unit (5) stacked in multiple layers between the two end plate bodies (4), characterized in that, Both ends of the two end plate bodies (4) and the multi-layer stacked electrolytic cell unit (5) are designed with wedge-shaped protrusions. Both ends of the wedge sleeve (1) are wedge-shaped grooves (2). The wedge-shaped grooves (2) of the wedge sleeve (1) fit into the wedge-shaped protrusions of the two end plate bodies (4) and the multi-layer stacked electrolytic cell unit (5). Both ends of the wedge sleeve (1) are provided with slots (3) and sliding guide components fixedly installed on the slots (3). The sliding guide components are connected to an elastic retractable mechanism and a plug-in mechanism fixedly installed on the elastic retractable mechanism. The elastic retractable mechanism is provided with a transmission mechanism.

2. The alkaline electrolytic cell with an integral wedge-shaped fastening end plate according to claim 1, characterized in that, The sliding guide assembly includes two slide rails (7) connected to the slot (3) and an arc groove (14) opened on the slide rails (7). Two sliding supports (8) are slidably installed on the slide rails (7).

3. The alkaline electrolytic cell with an integral wedge-shaped fastening end plate according to claim 2, characterized in that, The elastic retractable mechanism includes a spring (9) connected to the sliding support (8) and a sliding block (10) slidably mounted on the sliding support (8), the sliding block (10) abutting against the spring (9).

4. The alkaline electrolytic cell with an integral wedge-shaped fastening end plate according to claim 3, characterized in that, The elastic retractable mechanism also includes a fixed ring (11) connected to one end of the sliding block (10) and a plug rod (13) connected to the fixed ring (11), and the same internal threaded slider (12) is provided between the two fixed rings (11).

5. An alkaline electrolytic cell with an integral wedge-shaped fastening end plate according to claim 4, characterized in that, The two end plate bodies (4) are provided with positioning grooves (6) on their wedge-shaped protrusions. The plug rods (13) at one end of the four internal thread sliders (12) are respectively plugged into the positioning grooves (6) on the two end plate bodies (4).

6. The alkaline electrolytic cell with an integral wedge-shaped fastening end plate according to claim 5, characterized in that, Two double-ended screws (15) are threadedly connected to the four internal threaded sliders (12). The double-ended screws (15) pass through the two internal threaded sliders (12) distributed on both sides of the wedge sleeve (1). A knob (16) is provided at one end of the double-ended screws (15).

7. The alkaline electrolytic cell with an integral wedge-shaped fastening end plate according to claim 6, characterized in that, The transmission mechanism includes a transverse support frame (17) connected to two internal threaded sliders (12) on the same side, and a rotating disk (18) is provided on the transverse support frame (17).

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