Electrolytic hydrogen production device based on photovoltaic power generation

Abstract

The utility model relates to electrolytic hydrogen production technical field especially based on photovoltaic power generation's electrolytic hydrogen production device, include: electrolyte storage tank, be equipped with the electrode for electrolyzing electrolyte, electrolyte inlet pipe, be equipped with electrolyte storage tank's electrolyte import end, electrolyte outlet pipe, be equipped with electrolyte storage tank's electrolyte export end, oxygen outlet pipe, be equipped with electrolyte storage tank's oxygen export end, hydrogen outlet pipe, be equipped with electrolyte storage tank's hydrogen export end, surrounding mechanism, be equipped with electrolyte storage tank in, surrounding mechanism is used for electrolyte storage tank's inner chamber with electrolyte outlet pipe's intercommunication, control mechanism, be equipped with surrounding mechanism in, control mechanism in electrolyte storage tank's electrolyte fills up's moment, for controlling electrode power on electrolysis of electrolyte, the utility model can avoid power on not in time, lead to electrolyte electrolysis not completely, also can avoid electrode covering not completely, lead to the problem of low electrolysis efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen electrolysis technology, and in particular to a hydrogen electrolysis device based on photovoltaic power generation. Background Technology

[0002] Hydrogen, as a clean and efficient energy carrier, is gradually becoming an important part of the global energy transition and sustainable development strategy. Currently, the electrolysis of water to produce hydrogen incorporates photovoltaic power generation technology for power supply during the electrolysis process. For example, Chinese patent CN119020793B discloses a water electrolysis hydrogen production device, comprising at least one hydrogen production module. Each module is equipped with at least one electrolyzer, and each electrolyzer has two electrolyte storage tanks. The electrolyzer is equipped with a hydrogen delivery main pipe, an oxygen delivery main pipe, an electrolyte output main pipe, and an electrolyte input main pipe. A distribution valve is connected to the return port of the electrolyte storage tanks via a pipeline. The outlet of one electrolyte storage tank is connected to the electrolyte input main pipe via an electrolyte delivery pipe (pipeline 1), which is equipped with a concentration sensor (pipeline 2), a distribution valve (pipeline 6), and a distribution valve (pipeline 7). The outlet of the other electrolyte storage tank is connected to distribution valve 7 via an electrolyte delivery pipe (pipeline 2), which is equipped with a concentration sensor (pipeline 3). Through a meticulously designed electrolyte circulation system, efficient utilization and concentration control of the electrolyte are achieved, ensuring the stability and efficiency of the water electrolysis hydrogen production process.

[0003] However, the aforementioned patents still have the following problems:

[0004] Existing equipment lacks a high level of intelligence. In one scenario, the electrodes are energized and begin electrolysis before the electrolyte tank is fully filled, rendering the electrodes not in contact with the electrolyte ineffective and reducing electrolysis efficiency. To address this issue, this invention proposes a photovoltaic-based electrolysis hydrogen production device. Utility Model Content

[0005] To achieve the above objectives, this utility model provides an electrolytic hydrogen production device based on photovoltaic power generation, comprising:

[0006] An electrolyte storage tank, containing electrodes for electrolyzing the electrolyte;

[0007] An electrolyte inlet pipe is provided at the electrolyte inlet end of the electrolyte storage tank;

[0008] An electrolyte outlet pipe is provided at the electrolyte outlet end of the electrolyte storage tank;

[0009] An oxygen outlet pipe is located at the oxygen outlet end of the electrolyte storage tank;

[0010] A hydrogen outlet pipe is located at the hydrogen outlet end of the electrolyte storage tank;

[0011] An enclosing mechanism is provided inside the electrolyte storage tank, and the enclosing mechanism is used to connect the inner cavity of the electrolyte storage tank and the electrolyte outlet pipe;

[0012] A control mechanism is located within the enclosure mechanism. The control mechanism is used to control the electrodes to electrolyze the electrolyte the instant the electrolyte in the electrolyte tank is filled.

[0013] Optionally, the enclosure mechanism includes:

[0014] A fixed cylinder is fixedly installed inside the electrolyte storage tank. A liquid outlet hole is provided on the side wall of the fixed cylinder, which is used to connect the inner cavity of the fixed cylinder and the electrolyte outlet pipe.

[0015] The leak-proof component is movably disposed within the fixed cylinder;

[0016] The first guide component is fixedly connected at one end to the upper surface of the leak-proof component and at the other end to the inner top wall of the fixed cylinder.

[0017] Optionally, the leak-proof component includes:

[0018] The first leak-proof plate is movably disposed inside the fixed cylinder;

[0019] The second leak-proof plate is movably disposed inside the fixed cylinder, and a docking cavity is formed between the second leak-proof plate and the first leak-proof plate, and the docking cavity is in communication with the liquid outlet hole.

[0020] A connecting plate is disposed between the second leak-proof plate and the first leak-proof plate. One end of the connecting plate is fixedly connected to the lower end surface of the second leak-proof plate, and the other end of the connecting plate is fixedly connected to the upper end surface of the first leak-proof plate.

[0021] Optionally, the first guiding component includes:

[0022] The first guide rod is located on the upper surface of the second leak-proof plate;

[0023] The first guide cylinder is disposed on the inner top wall of the fixed cylinder, and the first guide cylinder is movably sleeved outside the first guide rod;

[0024] A first guide spring is wound around the outside of the first guide rod, and the two ends of the first guide spring are respectively fixedly connected to the side wall of the first guide rod and the outer side wall of the first guide cylinder.

[0025] Optionally, the control mechanism includes:

[0026] A control chamber is located between the second leak-proof plate and the fixed cylinder;

[0027] The first electrode contact is fixedly disposed on the upper end surface of the second leak-proof plate;

[0028] The second electrode contact is disposed above the first electrode contact, and both the second electrode contact and the first electrode contact are movably disposed within the control cavity;

[0029] The second guide assembly has one end fixedly disposed on the upper end surface of the second electrode contact, and the other end fixedly connected to the inner top wall of the fixed cylinder.

[0030] Optionally, the second guide component includes:

[0031] The second guide rod is fixedly mounted on the upper end surface of the second electrode contact piece;

[0032] The second guide cylinder is fixedly mounted on the inner top wall of the fixed cylinder, and the second guide cylinder is movably sleeved outside the second guide rod;

[0033] The second guide spring is wound around the second guide rod, and the two ends of the second guide spring are respectively fixedly connected to the side wall of the second guide rod and the outer side wall of the second guide cylinder.

[0034] Optionally, it also includes a pressure relief mechanism, which includes:

[0035] A fixed tube is fixedly inserted into the electrolyte outlet tube. The inner cavity of the fixed tube includes a first chamber located in the middle, a second chamber and a third chamber located on opposite sides of the first chamber. The second chamber has a trapezoidal structure, and the third chamber has a trumpet-shaped structure.

[0036] A movable plug is movably disposed within the fixed tube;

[0037] A second return spring is wound around the movable plug, and the two ends of the second return spring are respectively fixedly connected to the side wall of the third chamber and the side wall of the movable plug.

[0038] Optionally, the movable plug includes:

[0039] The first plug is movable within the first cavity;

[0040] The second plug is disposed on the first end of the first plug, and the second plug is movably disposed in the third chamber;

[0041] The third plug is located on the second end of the first plug, and the third plug is movably disposed within the second cavity.

[0042] Optionally, the third plug includes:

[0043] The first body is fixedly mounted on the first plug;

[0044] The second body is hinged to the first plug;

[0045] An elastic fabric is disposed between the first body and the second body, with its two ends fixedly connected to the lower end surface of the first body and the upper end surface of the second body, respectively.

[0046] A first reset spring is disposed between the first body and the second body, with its two ends fixedly connected to the lower end surface of the first body and the upper end surface of the second body, respectively.

[0047] Optionally, it also includes an isolation mechanism for isolating the first electrode contact and the second electrode contact, the isolation mechanism comprising:

[0048] An isolation plate is movably disposed within the control cavity, and the isolation plate is disposed between the first electrode contact and the second electrode contact;

[0049] An isolation rod is movably inserted into the electrolyte storage tank, and the first end of the isolation rod is fixedly connected to the side wall of the isolation plate;

[0050] A pull-out plate is fixedly mounted on the second end of the isolation rod.

[0051] The beneficial effects of this utility model are as follows:

[0052] This invention improves upon existing equipment by adding a control mechanism inside the electrolyte storage tank to control the activation of the electrodes. Specifically, the control mechanism has a reasonable structural design, energizing the electrodes the instant the electrolyte storage tank is filled with electrolyte. This avoids both the reduced electrolysis efficiency and incomplete electrolyte electrolysis caused by untimely energization, and the low electrolysis efficiency caused by incomplete electrode coverage. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of an embodiment of the electrolytic hydrogen production device based on photovoltaic power generation of this utility model;

[0054] Figure 2 This utility model relates to a photovoltaic power generation-based electrolytic hydrogen production device. Figure 1 Enlarged schematic diagram of structure A in the middle;

[0055] Figure 3 This is a schematic diagram of the pressure relief mechanism located at the electrolyte outlet pipe of the photovoltaic power generation electrolysis hydrogen production device of this utility model.

[0056] Figure 4 This utility model relates to a photovoltaic power generation-based electrolytic hydrogen production device. Figure 3A schematic diagram of the third plug in the pressure relief mechanism;

[0057] Figure 5 This utility model relates to a photovoltaic power generation-based electrolytic hydrogen production device. Figure 4 Enlarged schematic diagram of the B-structure;

[0058] Figure 6 This is a schematic diagram of the isolation mechanism between the first electrode contact and the second electrode contact in the photovoltaic-based electrolytic hydrogen production device of this utility model.

[0059] Explanation of reference numerals in the attached figures

[0060] Electrolyte storage tank 1, electrolyte inlet pipe 2, electrolyte outlet pipe 3, oxygen outlet pipe 4, hydrogen outlet pipe 5, surrounding mechanism 6, fixing cylinder 61, outlet hole 62, leak-proof assembly 63, first leak-proof plate 631, second leak-proof plate 632, connecting plate 633, docking cavity 634, first guide assembly 64, first guide rod 641, first guide cylinder 642, first guide spring 643, control mechanism 7, control cavity 71, first electrode contact 72, second electrode contact 73, second guide assembly Component 74, second guide rod 741, second guide cylinder 742, second guide spring 743, pressure relief mechanism 8, fixed tube 81, first chamber 82, second chamber 83, third chamber 84, movable plug 85, first plug 851, second plug 852, third plug 853, first body 8531, second body 8532, elastic cloth 8533, first return spring 8534, second return spring 86, isolation mechanism 9, isolation plate 91, isolation rod 92, pull-out plate 93. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but does not exclude other elements or objects.

[0062] To address the problems existing in the prior art, embodiments of this utility model provide an electrolytic hydrogen production device based on photovoltaic power generation, such as... Figure 1 and Figure 2As shown, the photovoltaic-based electrolytic hydrogen production device includes: an electrolyte storage tank 1 containing electrodes for electrolyzing the electrolyte; the electrodes, when energized, can be used for the electrolysis of the electrolyte.

[0063] The electrolyte inlet pipe 2 is located at the electrolyte inlet end of the electrolyte storage tank 1;

[0064] The electrolyte outlet pipe 3 is located at the electrolyte outlet end of the electrolyte storage tank 1;

[0065] Oxygen outlet pipe 4 is located at the oxygen outlet end of the electrolyte storage tank 1;

[0066] The hydrogen outlet pipe 5 is located at the hydrogen outlet end of the electrolyte storage tank 1;

[0067] The surrounding mechanism 6 is located inside the electrolyte storage tank 1. The surrounding mechanism 6 is used to connect the inner cavity of the electrolyte storage tank 1 and the electrolyte outlet pipe 3. The surrounding mechanism 6 serves two purposes: firstly, to prevent leakage, and secondly, to protect the internal structure of the control mechanism 7.

[0068] The control mechanism 7 is located inside the enclosure mechanism 6. The control mechanism 7 is used to control the electrodes to electrolyze the electrolyte the instant the electrolyte in the electrolyte tank 1 is filled.

[0069] In one implementation, such as Figure 2 As shown, the surrounding mechanism 6 includes: a fixed cylinder 61 fixedly disposed inside the electrolyte storage tank 1, and an outlet hole 62 opened on the side wall of the fixed cylinder 61, the outlet hole 62 being used for communication between the inner cavity of the fixed cylinder 61 and the electrolyte outlet pipe 3; a leak-proof component 63 movably disposed inside the fixed cylinder 61; and a first guide component 64 having one end fixedly connected to the upper end face of the leak-proof component 63 and the other end fixedly connected to the inner top wall of the fixed cylinder 61.

[0070] In one implementation, such as Figure 2 As shown, the leak-proof component 63 includes: a first leak-proof plate 631 movably disposed within the fixed cylinder 61; a second leak-proof plate 632 movably disposed within the fixed cylinder 61, with a mating cavity 634 formed between the second leak-proof plate 632 and the first leak-proof plate 631, the mating cavity 634 communicating with the liquid outlet 62; and a connecting plate 633 disposed between the second leak-proof plate 632 and the first leak-proof plate 631, one end of the connecting plate 633 being fixedly connected to the lower end face of the second leak-proof plate 632, and the other end of the connecting plate 633 being fixedly connected to the upper end face of the first leak-proof plate 631.

[0071] During operation, as the amount of electrolyte in the electrolyte tank 1 increases, it pushes the leak-proof component 63 upward. When the lower edge of the first leak-proof plate 631 passes the lower edge of the left opening of the outlet hole 62, the electrolyte will overflow from the electrolyte outlet pipe 3. In this example, the structure of the surrounding mechanism 6 serves to relieve pressure and prevent excessive pressure inside the electrolyte tank 1 when it is full of electrolyte.

[0072] In one implementation, such as Figure 2 As shown, the first guide assembly 64 includes: a first guide rod 641 disposed on the upper end surface of the second leak-proof plate 632; a first guide cylinder 642 disposed on the inner top wall of the fixed cylinder 61, the first guide cylinder 642 being movably sleeved on the outside of the first guide rod 641; and a first guide spring 643 wound around the outside of the first guide rod 641, the two ends of the first guide spring 643 being fixedly connected to the side wall of the first guide rod 641 and the outer side wall of the first guide cylinder 642, respectively.

[0073] In this embodiment, the first guide component 64 serves two purposes: firstly, it guides the movement of the leak-proof component 63, allowing the leak-proof component 63 to move only in the vertical direction; secondly, it provides a resetting force for the downward resetting movement of the leak-proof component 63.

[0074] In one implementation, such as Figure 2 As shown, the control mechanism 7 includes: a control cavity 71 located between the second leak-proof plate 632 and the fixed cylinder 61; a first electrode contact 72 fixedly disposed on the upper end surface of the second leak-proof plate 632; a second electrode contact 73 disposed above the first electrode contact 72, and both the second electrode contact 73 and the first electrode contact 72 are movably disposed within the control cavity 71; and a second guide assembly 74 with one end fixedly disposed on the upper end surface of the second electrode contact 73 and the other end fixedly connected to the inner top wall of the fixed cylinder 61.

[0075] During operation, as the leak-proof component 63 moves upward, it also moves the first electrode contact 72 upward. The upward movement of the first electrode contact 72 brings it into contact with the second electrode contact 73. When the second electrode contact 73 contacts the first electrode contact 72, the series circuit is connected, the electrode is energized, and the electrolysis process begins. It is important to note that when the second electrode contact 73 contacts the first electrode contact 72, the lower edge of the leak-proof component 63 and the lower left edge of the outlet hole 62 should be at the same horizontal level. This ensures that when electrolyte is added to the electrolyte tank 1, the leak-proof component 63 will move upward, allowing that portion of the electrolyte to drain from the electrolyte outlet pipe 3. This design ensures that the electrolyte in the electrolyte tank 1 remains full during electrolysis.

[0076] In one implementation, such as Figure 2 As shown, the second guide assembly 74 includes: a second guide rod 741 fixedly disposed on the upper end face of the second electrode contact 73; a second guide cylinder 742 fixedly disposed on the inner top wall of the fixed cylinder 61, the second guide cylinder 742 being movably sleeved outside the second guide rod 741; and a second guide spring 743 wound around the second guide rod 741, the two ends of the second guide spring 743 being fixedly connected to the side wall of the second guide rod 741 and the outer side wall of the second guide cylinder 742, respectively. In this embodiment, the second guide assembly 74 serves two purposes: it acts as a buffer, protecting the first electrode contact 72 and the second electrode contact 73 when they contact each other; it also guides and supports the movement of the second electrode contact 73, ensuring that the second electrode contact 73 moves only in the vertical direction; and it provides a restoring force for the reset movement of the second electrode contact 73. Furthermore, the second guide component 74 ensures that there is always a buffer distance between the first electrode contact 72 and the second electrode contact 73. This is so that after the first electrode contact 72 and the second electrode contact 73 come into contact, if electrolyte is injected into the electrolyte storage tank 1, this portion of electrolyte will be discharged from the electrolyte outlet pipe 3 as the anti-leakage component 63 moves upward, thus ensuring the smooth progress of the process and preventing the equipment from getting stuck.

[0077] In one implementation, such as Figure 3 As shown, the photovoltaic-based electrolytic hydrogen production device also includes a pressure relief mechanism 8. The pressure relief mechanism 8 seals the electrolyte outlet pipe 3 when the electrolyte storage tank 1 is not full, and opens the electrolyte outlet pipe 3 when the electrolyte level exceeds the full capacity, allowing excess electrolyte to drain. The pressure relief mechanism 8 includes: a fixed tube 81 fixedly inserted into the electrolyte outlet pipe 3; the inner cavity of the fixed tube 81 includes a first chamber 82 located in the middle, a second chamber 83 and a third chamber 84 located on opposite sides of the first chamber 82; the second chamber 83 has a trapezoidal structure, and the third chamber 84 has a trumpet-shaped structure; a movable plug 85 movably disposed within the fixed tube 81; and a second return spring 86 wound around the movable plug 85, with both ends of the second return spring 86 fixedly connected to the side wall of the third chamber 84 and the side wall of the movable plug 85, respectively.

[0078] In one implementation, such as Figure 3As shown, the movable plug 85 includes: a first plug 851 movably disposed within the first chamber 82; a second plug 852 disposed on the first end of the first plug 851, and movably disposed within the third chamber 84; and a third plug 853 disposed on the second end of the first plug 851, and movably disposed within the second chamber 83.

[0079] In one implementation, such as Figure 3 As shown, the third plug 853 includes: a first body 8531 fixedly disposed on the first plug 851; a second body 8532 hinged to the first plug 851; an elastic cloth 8533 disposed between the first body 8531 and the second body 8532, with both ends of the elastic cloth 8533 fixedly connected to the lower end surface of the first body 8531 and the upper end surface of the second body 8532, respectively; and a first return spring 8534 disposed between the first body 8531 and the second body 8532, with both ends of the first return spring 8534 fixedly connected to the lower end surface of the first body 8531 and the upper end surface of the second body 8532, respectively.

[0080] In one implementation, such as Figure 6 As shown, the photovoltaic-based electrolytic hydrogen production device further includes an isolation mechanism 9. The isolation mechanism 9 is used to isolate the first electrode contact 72 and the second electrode contact 73. The isolation mechanism 9 includes: an isolation plate 91 movably disposed within the control cavity 71, positioned between the first electrode contact 72 and the second electrode contact 73; an isolation rod 92 movably inserted into the electrolyte storage tank 1, with its first end fixedly connected to the side wall of the isolation plate 91; and a pull-out plate 93 fixedly disposed on the second end of the isolation rod 92.

[0081] Although the embodiments of this utility model have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of this utility model. Moreover, the utility model described herein may have other embodiments and can be implemented or realized in various ways.

Claims

1. A photovoltaic-based electrolytic hydrogen production device, characterized in that, include: An electrolyte storage tank (1) is provided with electrodes for electrolyzing the electrolyte. An electrolyte inlet pipe (2) is provided at the electrolyte inlet end of the electrolyte storage tank (1); An electrolyte outlet pipe (3) is provided at the electrolyte outlet end of the electrolyte storage tank (1); Oxygen outlet pipe (4) is located at the oxygen outlet end of the electrolyte storage tank (1); Hydrogen outlet pipe (5) is located at the hydrogen outlet end of the electrolyte storage tank (1); A surrounding mechanism (6) is provided inside the electrolyte storage tank (1). The surrounding mechanism (6) is used to connect the inner cavity of the electrolyte storage tank (1) and the electrolyte outlet pipe (3). The control mechanism (7) is located inside the enclosure mechanism (6). The control mechanism (7) is used to control the electrode to electrolyze the electrolyte at the moment when the electrolyte in the electrolyte tank (1) is filled.

2. The photovoltaic-based electrolytic hydrogen production device according to claim 1, characterized in that, The surrounding mechanism (6) includes: A fixed cylinder (61) is fixedly installed inside the electrolyte storage tank (1). An outlet hole (62) is provided on the side wall of the fixed cylinder (61). The outlet hole (62) is used to connect the inner cavity of the fixed cylinder (61) and the electrolyte outlet pipe (3). Leak-proof component (63) is movably disposed within the fixed cylinder (61); The first guide component (64) is fixedly connected at one end to the upper surface of the leak-proof component (63) and at the other end to the inner top wall of the fixed cylinder (61).

3. The photovoltaic-based electrolytic hydrogen production device according to claim 2, characterized in that, The leak-proof component (63) includes: The first leak-proof plate (631) is movably disposed inside the fixed cylinder (61); The second leak-proof plate (632) is movably disposed inside the fixed cylinder (61). A docking cavity (634) is formed between the second leak-proof plate (632) and the first leak-proof plate (631). The docking cavity (634) is in communication with the liquid outlet (62). A connecting plate (633) is disposed between the second leak-proof plate (632) and the first leak-proof plate (631). One end of the connecting plate (633) is fixedly connected to the lower end surface of the second leak-proof plate (632), and the other end of the connecting plate (633) is fixedly connected to the upper end surface of the first leak-proof plate (631).

4. The photovoltaic-based electrolytic hydrogen production device according to claim 3, characterized in that, The first guide component (64) includes: The first guide rod (641) is disposed on the upper end surface of the second leak-proof plate (632); The first guide cylinder (642) is disposed on the inner top wall of the fixed cylinder (61), and the first guide cylinder (642) is movably sleeved on the outside of the first guide rod (641); A first guide spring (643) is wound around the outside of the first guide rod (641), and the two ends of the first guide spring (643) are respectively fixedly connected to the side wall of the first guide rod (641) and the outer side wall of the first guide cylinder (642).

5. The photovoltaic-based electrolytic hydrogen production device according to claim 3, characterized in that, The control mechanism (7) includes: A control cavity (71) is located between the second leak-proof plate (632) and the fixed cylinder (61); The first electrode contact (72) is fixedly disposed on the upper end surface of the second leak-proof plate (632); The second electrode contact (73) is disposed above the first electrode contact (72), and both the second electrode contact (73) and the first electrode contact (72) are movably disposed within the control cavity (71); The second guide assembly (74) is fixed at one end on the upper surface of the second electrode contact (73) and at the other end on the inner top wall of the fixed cylinder (61).

6. The photovoltaic-based electrolytic hydrogen production device according to claim 5, characterized in that, The second guide component (74) includes: The second guide rod (741) is fixedly disposed on the upper end surface of the second electrode contact (73); The second guide cylinder (742) is fixedly disposed on the inner top wall of the fixed cylinder (61), and the second guide cylinder (742) is movably sleeved on the outside of the second guide rod (741); The second guide spring (743) is wound around the second guide rod (741), and the two ends of the second guide spring (743) are respectively fixedly connected to the side wall of the second guide rod (741) and the outer side wall of the second guide cylinder (742).

7. The photovoltaic-based electrolytic hydrogen production device according to claim 5, characterized in that, It also includes a pressure relief mechanism (8), which includes: A fixed tube (81) is fixedly inserted into the electrolyte outlet tube (3). The inner cavity of the fixed tube (81) includes a first chamber (82) located in the middle, a second chamber (83) and a third chamber (84) located on opposite sides of the first chamber (82). The cavity of the second chamber (83) has a trapezoidal structure, and the cavity of the third chamber (84) has a trumpet-shaped structure. The movable plug (85) is movably disposed within the fixed tube (81); A second return spring (86) is wound around the movable plug (85), and the two ends of the second return spring (86) are respectively fixedly connected to the side wall of the third chamber (84) and the side wall of the movable plug (85).

8. The photovoltaic-based electrolytic hydrogen production device according to claim 7, characterized in that, The movable plug (85) includes: The first plug (851) is movable within the first chamber (82); The second plug (852) is disposed on the first end of the first plug (851), and the second plug (852) is movably disposed in the third chamber (84); The third plug (853) is disposed on the second end of the first plug (851) and is movably disposed in the second chamber (83).

9. The photovoltaic-based electrolytic hydrogen production device according to claim 8, characterized in that, The third plug (853) includes: The first body (8531) is fixedly mounted on the first plug (851); The second body (8532) is hinged to the first plug (851); An elastic fabric (8533) is disposed between the first body (8531) and the second body (8532), with both ends of the elastic fabric (8533) fixedly connected to the lower end surface of the first body (8531) and the upper end surface of the second body (8532), respectively. A first reset spring (8534) is disposed between the first body (8531) and the second body (8532), with its two ends fixedly connected to the lower end surface of the first body (8531) and the upper end surface of the second body (8532), respectively.

10. The photovoltaic-based electrolytic hydrogen production device according to claim 8, characterized in that, It also includes an isolation mechanism (9) for isolating the first electrode contact (72) and the second electrode contact (73), the isolation mechanism (9) comprising: An isolation plate (91) is movably disposed within the control cavity (71), and the isolation plate (91) is disposed between the first electrode contact (72) and the second electrode contact (73); An isolation rod (92) is movably inserted into the electrolyte storage tank (1), and the first end of the isolation rod (92) is fixedly connected to the side wall of the isolation plate (91); A pull-out plate (93) is fixedly mounted on the second end of the isolation rod (92).

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