A hydraulic mechanism, an electrolyzer, and a hydrogen production system

Abstract

This utility model relates to the field of hydrogen production technology, specifically to a hydraulic mechanism, an electrolyzer, and a hydrogen production system. The hydraulic mechanism provided by this utility model includes a fixed base, a first end plate structure, a second end plate structure, a cylinder, and a locking assembly. The cylinder has a plunger rod that passes through the fixed base and connects to the first end plate structure, driving the first end plate structure to move towards or away from the second end plate structure to press or release the electrolyzer. The locking assembly is located on the fixed base and connected to the first end plate structure. The first and second end plate structures of this utility model can press the electrolyzer together. After pressing, the locking assembly on the fixed base restricts the movement of the first end plate structure towards the fixed base. The locking assembly is located on the fixed base, next to the plunger rod. While ensuring the same stroke, the length of the plunger rod is shortened, resulting in a shorter overall length of the hydraulic press and reduced space occupation.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology, specifically to a hydraulic mechanism, an electrolyzer, and a hydrogen production system. Background Technology

[0002] Currently, most alkaline water-to-hydrogen electrolyzers in China use a circular structure, sealed and fixed by screw tensioning. However, the existing screw-tensioned circular electrolyzer design cannot allow for online electrode disassembly and replacement, increasing maintenance time and reducing the electrolyzer's utilization rate. This has led to the development of hydraulically pressed square electrolyzers. These square electrolyzers are pressed using a hydraulic press, and are available in two types: pressurized electrolyzers and atmospheric pressure electrolyzers.

[0003] An existing hydraulic mechanism includes a fixed base, a locking nut, a cylinder, a fixed end plate, and a movable end plate. The cylinder is connected to the fixed base, and the piston rod of the cylinder is connected to the movable end plate. The piston rod has external threads, and the locking nut is screwed onto the piston rod. The piston rod extends a certain length to push the movable end plate closer to the fixed end plate to press the electrolytic cell (which is composed of multiple stacked square electrolytic cells) tightly. Tightening the locking nut causes it to abut against the fixed base, fixing the extension length of the piston rod. This prevents the movable end plate from moving towards the fixed base, providing stable clamping force while improving the service life of the cylinder.

[0004] Similar to the hydraulic press described above, because the locking nut is screwed onto the piston rod of the oil cylinder, the hydraulic system and the piston rod are designed as one unit. This results in a longer piston rod, which in turn makes the entire hydraulic press longer and occupies more space. Utility Model Content

[0005] (i) The problem to be solved by this utility model is that since the locking nut is screwed onto the piston rod of the oil cylinder, that is, the hydraulic system and the piston rod are designed as one unit, the required length of the piston rod is long, resulting in a long overall length of the hydraulic press and a large space occupation.

[0006] (II) Technical Solution The present invention provides a hydraulic mechanism, including a fixed base, a first end plate structure, a second end plate structure, an oil cylinder, and a locking assembly; The cylinder has a plunger rod that passes through the fixed seat and is connected to the first end plate structure. The plunger rod is used to drive the first end plate structure to move toward or away from the second end plate structure in order to press or release the electrolytic reactor. The locking assembly is disposed on the fixed base and connected to the first end plate structure, and the locking assembly can restrict the first end plate structure from moving toward the fixed base.

[0007] According to one embodiment of the present invention, the locking assembly includes a locking member and a guide rod; The fixed base is provided with a first through hole. One end of the guide rod is connected to the first end plate structure, and the other end passes through the first through hole. The locking member is used to restrict the guide rod from moving toward the fixed base.

[0008] According to one embodiment of the present invention, the locking component includes a locking nut, the guide rod is a threaded rod, the locking nut is screwed to the guide rod, and the locking nut passes through the guide rod and is located between the fixing seat and the first end plate structure.

[0009] According to one embodiment of the present invention, the locking member further includes a guide sleeve, one end of which is connected to the first through hole, and the guide rod is slidably connected inside the guide sleeve.

[0010] According to one embodiment of the present invention, the guide rod is connected to the first end plate structure via a connector.

[0011] According to one embodiment of the present invention, the connector includes a key plate and a fixing bolt; The first end plate structure has a first circular groove, the side wall of the guide rod has a slot, one side of the key plate is inserted into the slot, one end of the guide rod is inserted into the first circular groove, and the key plate is connected to one side of the first end plate structure by a plurality of fixing bolts.

[0012] According to one embodiment of the present invention, at least a portion of the side of the fixing seat near the first end plate structure is planar.

[0013] According to one embodiment of the present invention, the locking assembly is provided in at least two sets, and the at least two sets of the locking assembly are symmetrically arranged on both sides of the fixing seat.

[0014] An electrolytic cell comprising any one of the hydraulic mechanisms described above.

[0015] A hydrogen production system, comprising any of the hydraulic mechanisms described above, or comprising an electrolyzer described above.

[0016] The beneficial effects of this utility model are: The first end plate structure moves toward the second end plate structure via the plunger rod, so that the first and second end plate structures can press the electrolytic reactor together. After pressing, the first end plate structure is restricted from moving toward the fixed seat by the locking component set on the fixed seat. Compared with the traditional method of integrating a locking nut on the plunger rod, the locking component is set on the fixed seat and located next to the plunger rod. Under the premise of ensuring the same stroke, the length of the plunger rod is shortened, which shortens the overall length of the hydraulic press and reduces the space occupied. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A perspective view of a first hydraulic mechanism provided for an embodiment of this utility model; Figure 2 A perspective view of the fixing base, locking assembly, and hydraulic cylinder provided for embodiments of this utility model; Figure 3 A perspective view of the locking assembly provided in an embodiment of this utility model; Figure 4 A perspective view of the first end plate structure provided for an embodiment of this utility model; Figure 5 A perspective view of a second hydraulic mechanism provided for an embodiment of this utility model.

[0019] Icons: 1. Fixed seat; 2. First end plate structure; 21. First circular groove; 22. Rectangular hollow plate; 23. Support roller; 24. First connecting block; 25. Second connecting block; 3. Second end plate structure; 4. Hydraulic cylinder; 41. Piston rod; 5. Locking assembly; 51. Guide rod; 52. Locking nut; 53. Guide sleeve; 54. Key plate; 55. Fixing bolt; 56. Flange; 57. Handle; 6. Main beam assembly; 61. Strip plate. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Example 1: like Figures 1-5 As shown, one embodiment of the present invention provides a hydraulic mechanism, including a fixed base 1, a first end plate structure 2, a second end plate structure 3, an oil cylinder 4, and a locking assembly 5; The cylinder 4 has a plunger rod 41, which passes through the fixed seat 1 and is connected to the first end plate structure 2. It is used to drive the first end plate structure 2 to move toward or away from the second end plate structure 3 to press or release the electrolytic stack. The locking component 5 is mounted on the fixed base 1 and connected to the first end plate structure 2. The locking component 5 can restrict the first end plate structure 2 from moving toward the fixed base 1.

[0022] The first end plate structure 2 is moved toward the second end plate structure 3 by the plunger rod 41, so that the first end plate structure 2 and the second end plate structure 3 can press the electrolytic stack together. After pressing, the first end plate structure 2 is restricted from moving toward the fixed seat 1 by the locking component 5 provided on the fixed seat 1. Compared with the traditional method of integrating a locking nut on the plunger rod 41, the locking component 5 is provided on the fixed seat 1 and located next to the plunger rod 41. Under the premise of ensuring the same stroke, the length of the plunger rod 41 is shortened, which shortens the overall length of the hydraulic press and reduces the space occupied.

[0023] According to one embodiment of the present invention, the locking assembly 5 is provided in at least two sets, and the at least two sets of locking assemblies 5 are symmetrically arranged on both sides of the fixing base 1. The multiple sets of symmetrically arranged locking assemblies 5 provide clamping force on both sides, improve the uniformity of sealing stress, and improve the sealing performance of the electrolytic reactor.

[0024] Furthermore, the locking assembly 5 includes a locking element and a guide rod 51; The fixed base 1 is provided with a first through hole. One end of the guide rod 51 is connected to the first end plate structure 2, and the other end passes through the first through hole. The locking member is used to restrict the guide rod 51 from moving toward the fixed base 1.

[0025] The guide rod 51 can slide along the first end plate structure 2. When the first end plate structure 2 no longer moves, the position of the locking member is adjusted to restrict the guide rod 51 from moving toward the fixed seat 1, thereby preventing the first end plate structure 2 connected to it from moving toward the fixed seat 1. The locking member and the guide rod 51 work together to provide a stable mechanical clamping force, thereby improving the service life of the hydraulic cylinder 4.

[0026] According to one embodiment of the present invention, the locking component includes a locking nut 52, a guide rod 51 being a threaded rod, and the locking nut 52 being screwed onto the guide rod 51. The locking nut 52 passes through the guide rod 51 and is located between the fixed seat 1 and the first end plate structure 2. By tightening the locking nut 52, the locking nut 52 abuts against the fixed seat 1, thereby restricting the movement of the first end plate structure 2 toward the fixed seat 1. To facilitate tightening the locking nut 52, multiple handles 57 can be connected around the locking nut 52. Preferably, multiple connecting grooves are provided on the side wall of the locking nut 52, and the ends of the handles 57 can be interference-fitted into the connecting grooves to fix the handles 57.

[0027] According to one embodiment of this utility model, the locking component further includes a guide sleeve 53, one end of which is connected to the first through hole, and the guide rod 51 is slidably connected inside the guide sleeve 53. The guide sleeve 53 serves to guide and support the guide rod 51, allowing it to slide more smoothly along its length. The axis of the guide sleeve 53 and the axis of the locking nut 52 coincide with the axis of the guide rod 51, and the axis of the guide rod 51 is perpendicular to the first end plate structure 2.

[0028] Of course, in this embodiment, the locking component 5 can also be in other forms. For example, the locking component 5 includes a threaded ring, an internal threaded sleeve, and a sliding rod. One end of the internal threaded sleeve near the first end plate structure 2 is connected to the first through hole, and the other end is suspended. One end of the sliding rod is connected to the first end plate structure 2, and the other end of the sliding rod is slidably connected to the internal threaded sleeve. An abutment rod is screwed into the internal end of the internal threaded sleeve away from the first end plate structure 2. One end of the abutment rod is connected to a handle, and the other end can abut against the sliding rod. When the first end plate structure 2 moves into place, the abutment rod is screwed in, so that the abutment rod abuts against the sliding rod, thereby preventing the first end plate structure 2 from moving toward the fixed seat 1. Its purpose has not deviated from the design concept of this utility model, and therefore, it should fall within the protection scope of this utility model.

[0029] According to one embodiment of the present invention, the guide rod 51 is connected to the first end plate structure 2 via a connector.

[0030] Preferably, two connectors are symmetrically provided along the circumference of the guide rod 51, and the connectors include a key plate 54 and a fixing bolt 55; The first end plate structure 2 has a first circular groove 21, the side wall of the guide rod 51 has a slot, one side of the key plate 54 is inserted into the slot, one end of the guide rod 51 is inserted into the first circular groove 21, and the key plate 54 is connected to one side of the first end plate structure 2 by multiple fixing bolts 55.

[0031] One end of the guide rod 51 is inserted into the first circular groove 21 through the guide sleeve 53. Two key plates 54 are inserted into their respective slots. The key plates 54 are then fixed to one side of the first end plate structure 2 using fixing bolts 55. The annular sidewall of the first circular groove 21 restricts the movement of the guide rod 51 in a direction perpendicular to its axis. The bottom wall of the first circular groove 21 restricts the movement of the guide rod 51 along the direction from the first end plate structure 2 to the second end plate structure 3. The cooperation of the two sets of key plates 54 and slots not only restricts the movement of the guide rod 51 along the direction from the first end plate structure 2 to the fixed seat 1, but also restricts the circumferential rotation of the guide rod 51, thus fixing the guide rod 51 relatively to the first end plate structure 2. Restricting the circumferential rotation of the guide rod 51 makes tightening the locking nut 52 easier and faster.

[0032] Of course, in this embodiment, the guide rod 51 can also be directly welded to one side of the first end plate structure 2, or the guide rod 51 can be fixedly connected to one side of the first end plate structure 2 via a flange, or the guide sleeve 53 can have an internal thread, with one end of the guide rod 51 rotatably connected to the first end plate structure 2, so that when the first end plate structure 2 moves, the guide rod 51 moves and rotates simultaneously, reducing the flexibility of the guide rod 51's movement. As long as the connection between the guide rod 51 and the first end plate structure 2 can be achieved, so that the guide rod 51 does not move relative to the first end plate structure 2 along its axial direction, it is acceptable.

[0033] According to one embodiment of the present invention, at least a portion of the side of the fixed seat 1 near the first end plate structure 2 is flat. Preferably, the end face of the guide sleeve 53 does not protrude from the side of the fixed seat 1 near the first end plate structure 2. Tighten the locking nut 52 until it abuts against one side of the fixed seat 1, so that the guide rod 51 cannot move toward the fixed seat 1.

[0034] Optionally, the end face of the guide sleeve 53 protrudes from the side of the fixed seat 1. The end of the guide sleeve 53 is connected to the flange 56. The flange 56 has multiple countersunk holes, and the screws and countersunk holes correspond one-to-one. The flange 56 is detachably connected by multiple screw fixing seats 1. When installed in place, the screws do not protrude from the end face of the flange 56. At this time, the locking nut 52 is tightened, and the locking nut 52 abuts against the flange 56, so that the guide rod 51 cannot move toward the fixed seat 1.

[0035] According to one embodiment of the present invention, the hydraulic press further includes a main beam assembly 6; One side of the main beam assembly 6 is connected to the fixing seat 1, and the other side is connected to the second end plate structure 3; The first end plate structure 2 is disposed between the fixed base 1 and the second end plate structure 3 and is slidably connected to the main beam assembly 6. The main beam assembly 6, the first end plate structure 2 and the second end plate structure 3 form a placement space for placing the electrolytic reactor.

[0036] Preferably, one side of the main beam assembly 6 is detachably connected to a fixed seat 1, and the other side is detachably connected to a second end plate structure 3. They can be connected by bolts, pins, or other connecting structures. The detachable connection method allows the entire hydraulic mechanism to be disassembled into multiple modules for separate transportation, greatly reducing transportation costs.

[0037] According to one embodiment of the present invention, such as Figure 1 As shown, the first end plate structure 2 includes a rectangular hollow plate 22 and a support roller 23; Both sides of the rectangular hollow plate 22 are rotatably connected to support rollers 23.

[0038] The rectangular hollow plate 22 includes a first main frame, a first connecting block 24 and a second connecting block 25. Multiple horizontal steel pipes and multiple vertical steel are welded together to form the first main frame. Compared with the design of solid end plates, it saves materials and reduces production costs.

[0039] The first connecting block 24 is welded to the first main frame. The first connecting block 24 has a first circular groove 21 and multiple first threaded holes. The fixing bolt 55 passes through the key plate 54 and is screwed into the first threaded hole. The second connecting block 25 is welded to the first main frame. The end of the plunger rod 41 is fixedly connected to the second circular groove on the second connecting block 25.

[0040] The fixed base 1 includes a second main frame and a fastening plate connected to each other. The second main frame is formed by welding together multiple horizontal and vertical rectangular steel tubes. In order to assemble the guide sleeve 53 and the oil cylinder 4, a fastening plate is set up. A first through hole for the guide rod 51 to pass through and a second through hole for the plunger rod 41 to pass through are opened on the fastening plate. The fastening plate can provide a smooth contact surface, ensuring that the end face of the locking nut 52 is completely in contact with the fixed base 1. When the locking nut 52 is tightened, the preload will be evenly distributed on the entire contact surface, resulting in better locking effect and more uniform force.

[0041] It should be noted that, as Figure 2 As shown, the fastening plate can be set as a single piece of plate. In this case, the side of the fixing seat 1 near the first end plate structure 2 is entirely flat, as shown below. Figure 1 As shown, the fastening plate can also be composed of multiple small rectangular plates. In this case, a portion of the side of the fixing seat 1 near the first end plate structure 2 is a plane.

[0042] Of course, in this embodiment, it is also possible to... Figure 5 As shown, the fixing base 1, the first end plate structure 2, and the second end plate structure 3 are all rectangular plates with flat surfaces. It should be noted that... Figure 1 The fixed seat 1 in the middle can hold Figure 5 The fixed seat 1 in the second type of hydraulic mechanism is replaced, or Figure 1 The first end plate structure 2 in the middle will Figure 5 The first end plate structure 2 in the middle is replaced and used interchangeably.

[0043] The main beam assembly 6 includes two parallel strip plates 61; The strip plate 61 corresponds one-to-one with the support roller 23, and the side wall of the support roller 23 contacts the upper end surface of the strip plate 61. The support roller 23 can support the first end plate structure 2, and since the support roller 23 can roll on the upper end surface of the strip plate 61, the first end plate structure 2 can move more smoothly.

[0044] Each strip 61 is connected to a support foot at the bottom, which can provide support for the strip 61 and prevent the strip 61 from deforming due to excessive force.

[0045] Preferably, the first end plate structure 2 has mounting grooves on both sides, and each mounting groove is connected to a rotating shaft. The other end of the rotating shaft protrudes from the side wall of the first end plate structure 2, and a support roller 23 is connected to the rotating shaft through a bearing.

[0046] Example 2: An electrolytic cell, including a hydraulic mechanism as described in Example 1, and an electrolytic stack, which is placed in a placement space. The hydraulic mechanism is used to press the electrolytic stack, which is composed of multiple stacked square electrolytic cells.

[0047] Example 3: A hydrogen production system, including the hydraulic mechanism of Example 1, or including an electrolyzer of Example 2.

[0048] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic mechanism, characterized in that, It includes a fixed base (1), a first end plate structure (2), a second end plate structure (3), a hydraulic cylinder (4), and a locking assembly (5); The cylinder (4) has a plunger rod (41), which passes through the fixed seat (1) and is connected to the first end plate structure (2) to drive the first end plate structure (2) to move toward or away from the second end plate structure (3) to press or loosen the electrolytic reactor. The locking component (5) is disposed on the fixed base (1) and connected to the first end plate structure (2). The locking component (5) can restrict the first end plate structure (2) from moving toward the fixed base (1).

2. A hydraulic mechanism according to claim 1, characterized in that, The locking assembly (5) includes a locking element and a guide rod (51); The fixed base (1) is provided with a first through hole. One end of the guide rod (51) is connected to the first end plate structure (2), and the other end passes through the first through hole. The locking member is used to restrict the guide rod (51) from moving toward the fixed base (1).

3. A hydraulic mechanism according to claim 2, characterized in that, The locking component includes a locking nut (52), the guide rod (51) is a threaded rod, the locking nut (52) is screwed to the guide rod (51), the locking nut (52) passes through the guide rod (51) and is located between the fixed seat (1) and the first end plate structure (2).

4. A hydraulic mechanism according to claim 3, characterized in that, The locking component also includes a guide sleeve (53), one end of which is connected to the first through hole, and the guide rod (51) is slidably connected inside the guide sleeve (53).

5. A hydraulic mechanism according to claim 2, characterized in that, The guide rod (51) is connected to the first end plate structure (2) via a connector.

6. A hydraulic mechanism according to claim 5, characterized in that, The connector includes a key plate (54) and a fixing bolt (55); The first end plate structure (2) has a first circular groove (21), the guide rod (51) has a slot on its side wall, one side of the key plate (54) is inserted into the slot, one end of the guide rod (51) is inserted into the first circular groove (21), and the key plate (54) is connected to one side of the first end plate structure (2) by a plurality of fixing bolts (55).

7. A hydraulic mechanism according to claim 1, characterized in that, At least a portion of the side of the fixed base (1) near the first end plate structure (2) is planar.

8. A hydraulic mechanism according to claim 1, characterized in that, The locking assembly (5) is provided in at least two sets, and the at least two sets of the locking assembly (5) are symmetrically arranged on both sides of the fixing seat (1).

9. An electrolytic cell, characterized in that, Includes a hydraulic mechanism as described in any one of claims 1-8.

10. A hydrogen production system, characterized in that, It includes a hydraulic mechanism as described in any one of claims 1-8, or an electrolytic cell as described in claim 9.

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