Electrolytic bath extruding machine, pressing method and electrolytic bath

Abstract

The invention relates to the technical field of electrolytic hydrogen production equipment, and provides an electrolytic bath extruding machine, a pressing method and an electrolytic bath. The mounting seat is arranged on at least one side of the fixed seat, and the mounting seat and the fixed seat are arranged alternately; the cross beam is arranged between the fixed seat and the mounting seat; the movable pressing seat is slidably arranged on the cross beam and can move close to or away from the mounting seat along the cross beam; the movable pressing seat is provided with an extrusion surface facing the fixed seat and a connecting side deviating from the fixed seat, and the fixed seat is provided with a matching surface corresponding to the extrusion surface; the driving part is connected to the mounting base, the driving end is connected with the connecting side, and the driving part is used for driving the movable pressing base to move close to or away from the fixed base; the auxiliary locking piece is connected to the mounting base, and the auxiliary locking piece comprises a locking end capable of moving close to or away from the connecting side. Through the arrangement, the sealing effect of the tank body can be ensured while the disassembly, assembly and adjustment difficulty of the electrolytic tank is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic hydrogen production equipment, and in particular to an electrolytic cell extruder, a compacting method and an electrolytic cell. Background Art

[0002] At present, with the proposal of dual carbon, the number of domestic 100MW green hydrogen demonstration projects is gradually increasing, and ultra-large-scale off-grid hydrogen production by green electricity (GW-level green hydrogen plant) will become a future development trend. In response to the demand for such large-scale hydrogen production scenarios, domestic and foreign manufacturers have launched large-scale square alkaline electrolyzers. At present, there are two mainstream large-scale square alkaline electrolyzer structures: traditional round cells and square alkaline cells.

[0003] The square alkaline electrolytic cell is composed of multiple electrolytic chamber structures stacked together. Each electrolytic chamber includes a bipolar plate, an anode, a sealing gasket, a diaphragm, a sealing gasket, a cathode and a bipolar plate as well as a flow channel for the electrolyte. The sealing of the multi-layer structure of a single electrolytic chamber and the sealing of each chamber must be ensured, so the multiple electrolytic chambers must be stacked and extruded.

[0004] At present, there are two commonly used stacking and extrusion methods for square alkaline electrolytic cells, one is screw tightening and the other is hydraulic cylinder top tightening.

[0005] However, in the above-mentioned related technologies, the tightening torque of the tightening screw needs to be manually controlled, which cannot be guaranteed to be completely consistent. In addition, there are many tightening screws, which makes disassembly and assembly inconvenient. In addition, after the gasket creeps, the clamping force is difficult to adjust. When the hydraulic cylinder is tightened, once the cylinder pressure drops due to internal leakage or other reasons, the piston rod of the hydraulic cylinder will be displaced, causing the tank to leak.

[0006] Therefore, how to reduce the difficulty of disassembly, assembly and adjustment of the equipment while ensuring the sealing effect of the tank body is an important issue that needs to be solved urgently. Summary of the invention

[0007] The present invention provides an electrolytic cell extruder, a pressing method and an electrolytic cell, which are used to solve the defects in the prior art that the cell body is difficult to disassemble and adjust and the sealing effect is difficult to ensure. The sealing effect of the cell body can be ensured while reducing the difficulty of disassembling and adjusting the electrolytic cell.

[0008] The present invention provides an electrolytic cell extruder, comprising: Fixed seat; A mounting seat, provided on at least one side of the fixing seat and arranged alternately with the fixing seat; A crossbeam, arranged between the fixing seat and the mounting seat; A movable pressing seat is slidably arranged on the crossbeam and can move along the crossbeam toward or away from the mounting seat; the movable pressing seat is provided with an extrusion surface facing the fixed seat and a connection side facing away from the fixed seat, and the fixed seat is provided with a matching surface corresponding to the extrusion surface; A driving member, connected to the mounting seat and having a driving end connected to the connecting side, for driving the movable pressing seat to move closer to or away from the fixed seat; An auxiliary locking member is connected to the mounting seat, and the auxiliary locking member includes a locking end that can move toward or away from the connecting side.

[0009] According to an electrolytic cell extruder provided by the present invention, a plurality of auxiliary locking members are evenly distributed around the geometric center of the extrusion surface.

[0010] According to an electrolytic cell extruder provided by the present invention, the movable pressing seat is provided with a first side and a second side opposite to each other, and the first side and the second side are adjacent to the extrusion surface; The cross beams are provided with two, and the two cross beams are respectively slidably matched with the first side and the second side through a sliding assembly.

[0011] According to an electrolytic cell extruder provided by the present invention, the sliding assembly comprises: A slide rail, arranged on the crossbeam and arranged along the length direction of the crossbeam, the slide rail being provided with a first sliding surface; A slider is connected to the movable pressure seat and has a second sliding surface at the bottom. The second sliding surface is slidably supported on the first sliding surface. At least one of the slide rail and the slider is made of insulating material.

[0012] According to an electrolytic cell extruder provided by the present invention, the first sliding surface and the second sliding surface in the sliding assembly located at least one of the first side and the second side are configured to be in concave-convex surface contact.

[0013] According to an electrolytic cell extruder provided by the present invention, in the sliding assembly on the first side of the movable press seat, the first sliding surface and the second sliding surface are in concave-convex surface contact; in the sliding assembly on the second side, the first sliding surface and the second sliding surface are in planar contact.

[0014] According to an electrolytic cell extruder provided by the present invention, the slide rail is convexly arranged on the crossbeam; According to an electrolytic cell extruder provided by the present invention, in the sliding assembly on the first side, the cross section of the slide rail is trapezoidal, the slide block is provided with a trapezoidal groove, the slide rail is engaged with the groove, and the contact portion is formed as the first sliding surface and the second sliding surface in which the concave and convex surfaces are engaged; According to an electrolytic cell extruder provided by the present invention, the slide rail is formed by bending and is hollow inside, and a reinforcing rib is provided inside the slide rail; the bottom of the reinforcing rib is supported on the cross beam, and the top is supported on the bottom of the first sliding surface.

[0015] An electrolytic cell extruder provided according to the present invention further comprises an adjustment mechanism for adjusting the pitch angle of the movable press seat; Preferably, the adjustment mechanism comprises: An installation box is fixedly connected to the side of the movable pressure seat, and an opening is provided at the bottom of the installation box. In the direction of the opening, the slider is slidably arranged in the installation box so that the first sliding surface at the bottom of the slider can be exposed from the opening and cooperate with the slide rail; There are two adjusting bolts, which are distributed on both sides of the center of the slider in the extension direction of the slide rail; the adjusting bolts are threadedly connected to the installation box and the ends of the adjusting bolts penetrate into the installation box and act on the side of the slider away from the first sliding surface; Preferably, the adjustment mechanism further comprises a locking nut; the locking nut is threadedly connected to the adjustment bolt, and the bottom of the locking nut is used to abut against the installation box; Preferably, the adjustment mechanism further includes a pad; the pad is arranged in the installation box and located between the adjustment bolt and the slider.

[0016] Preferably, a reinforcing plate is connected between the installation box and the movable pressure seat.

[0017] The present invention also provides an electrolytic cell, comprising the electrolytic cell extruder described in any one of the above.

[0018] The present invention also provides a compacting method of an electrolytic cell extruder, which is applicable to the compacting working conditions of the electrolytic cell, wherein the compacting working conditions of the electrolytic cell at least include an installation working condition and an airtightness test working condition; The installation condition includes the following steps: Determine the target position of the movable press seat and the target stroke of the driving end corresponding to the target position in the displacement control mode; Controlling the movement of the driving end to push the movable pressing seat to a target position; Controlling the locking end of the auxiliary locking member to move close to the movable pressure seat to a position of a first preset distance; The airtight test condition comprises the following steps: During the pressurization stage, when it is determined in the displacement control mode that the actual position of the movable press seat deviates from the target position, the driving end is controlled to move so that the movable press seat is maintained at the target position; During the pressure-maintaining stage, when it is determined that the pressure in the tank reaches the test pressure, the mode is switched to the pressure control mode, in which the current pressure of the driving end is obtained as the preset pressure; After determining that the actual pressure of the driving end deviates from the preset pressure, the driving end is controlled to move so that the actual pressure is maintained at the preset pressure.

[0019] According to a compacting method of an electrolytic cell extruder provided by the present invention, the working condition of the electrolytic cell also includes an operating condition; the operating condition includes the following steps: In the boost phase, when it is determined in the displacement control mode that the actual position of the movable pressure seat deviates from the target position, the driving end is controlled to move so that the movable pressure seat is maintained at the target position; In the voltage stabilization and temperature rise stage, the current pressure of the driving end is obtained as the preset pressure in the pressure control mode, and after determining that the actual pressure of the driving end deviates from the preset pressure, the driving end is controlled to move so that the actual pressure remains at the preset pressure; After determining that the hydrogen side outlet of the electrolyzer reaches a set temperature, controlling the locking end to move close to the movable pressure seat to a position of a second preset distance; After it is determined that the temperature of the electrolytic cell reaches the rated operating temperature and has been stably operating for a set time, the locking end is controlled to be pressed against the movable pressure seat to reduce the pressure of the driving end to a set value.

[0020] According to a compacting method of an electrolytic cell extruder provided by the present invention, the working condition of the electrolytic cell also includes a maintenance working condition; the maintenance working condition includes the following steps: When it is determined that the locking end does not press against the movable pressing seat, determining the control mode of the driving member; When it is determined that the driving member is in the displacement control mode, controlling the locking end to press against the movable pressing seat; When it is determined that the driving member is in the pressure control mode, the locking end is controlled to press against the movable pressure seat, and the driving end is controlled to move so that the pressure is reduced to a set value; Preferably, the maintenance operation also includes the following steps: In the liquid discharge and displacement stage, the mode is switched to the displacement control mode, and the locking end is controlled to press against the movable pressure seat; Preferably, the maintenance working condition further includes the following steps: When it is determined that the hydrogen side outlet temperature drops more than a preset value, controlling the driving end to move to the preset pressure; Controlling the locking end to move away from the movable pressure seat to a position of the second preset distance; When the temperature is stable, the locking end is controlled to be pressed against the movable pressure seat, and the pressure of the driving end is reduced to a set value.

[0021] The electrolytic cell extruder, pressing method and electrolytic cell provided by the present invention can lock the movable pressing seat in a pressed and sealed state by providing an auxiliary locking piece, thereby effectively avoiding the problem of cell body leakage caused by insufficient thrust of the driving piece and ensuring the sealing effect of the cell body. At the same time, the reciprocating locking end of the auxiliary locking piece can cooperate with the driving end of the driving piece, thereby improving the convenience of disassembly, assembly and adjustment of the cell body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is one of the structural schematic diagrams of the electrolytic cell extruder provided in the embodiment of the present invention.

[0024] Figure 2 This is the second structural schematic diagram of the electrolytic cell extruder provided in an embodiment of the present invention.

[0025] Figure 3 It is a structural schematic diagram of a movable pressure seat provided in an embodiment of the present invention.

[0026] Figure 4 It is a structural schematic diagram of a sliding assembly and an adjusting mechanism on the first side of a movable pressure seat provided in an embodiment of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the sliding assembly and the adjustment mechanism on the second side of the movable pressure seat provided in an embodiment of the present invention.

[0028] Reference numerals: 10. Fixed seat; 11. Mounting seat; 12. Crossbeam; 13. Movable pressure seat; 14. Driving member; 15. Auxiliary locking member; 20. First slide rail; 21. First slider; 210. Groove; 22. First reinforcing rib; 30. Second slide rail; 31. Second slider; 32. Second reinforcing rib; 40. Mounting box; 41. Adjusting bolt; 42. Locking nut; 43. Pad; 44. Reinforcing plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] With the introduction of dual carbon, large-scale green hydrogen projects are increasing in China, and large-scale square alkaline electrolyzer technology has also made great progress. The current mainstream large-scale square alkaline electrolyzer structures include traditional circular cells and square alkaline cells.

[0031] The square alkaline electrolytic cell is composed of multiple electrolytic chamber structures stacked together. Each electrolytic chamber includes a bipolar plate, an anode, a sealing gasket, a diaphragm, a sealing gasket, a cathode and a bipolar plate as well as a flow channel for the electrolyte. The sealing of the multi-layer structure of a single electrolytic chamber and the sealing of each chamber must be ensured, so the multiple electrolytic chambers must be stacked and extruded.

[0032] At present, there are two commonly used stacking and extrusion methods for square alkaline electrolytic cells, one is screw tightening and the other is hydraulic cylinder top tightening.

[0033] However, the tightening torque of the tightening screw needs to be manually controlled, which cannot be guaranteed to be completely consistent. In addition, there are many tightening screws, which makes disassembly and assembly inconvenient. In addition, after the gasket creeps, the clamping force is difficult to adjust. If the hydraulic cylinder is tightened, once the cylinder pressure drops due to internal leakage or other reasons, the piston rod of the hydraulic cylinder will be displaced, causing the tank to leak.

[0034] Therefore, how to reduce the difficulty of disassembly, assembly and adjustment of the equipment while ensuring the sealing effect of the tank body is an important issue that needs to be solved urgently.

[0035] In view of the above problems, the present invention provides an electrolytic cell extruder, a pressing method and an electrolytic cell, which can reduce the difficulty of disassembly, assembly and adjustment of the electrolytic cell while ensuring the sealing effect of the cell body.

[0036] Combine the following Figure 1-Figure 5 The electrolytic cell extruder, the compacting method and the electrolytic cell of the present invention are described.

[0037] Reference Figure 1, an electrolytic cell extruder, comprising a fixed seat 10, a mounting seat 11, a crossbeam 12, a movable pressure seat 13, a driving member 14 and an auxiliary locking member 15; wherein the mounting seat 11 is arranged on at least one side of the fixed seat 10 and is arranged alternately with the fixed seat 10; the crossbeam 12 is arranged between the fixed seat 10 and the mounting seat 11; the movable pressure seat 13 is slidably arranged on the crossbeam 12 and can move closer to or away from the mounting seat 11 along the crossbeam 12, the movable pressure seat 13 is provided with an extrusion surface facing the fixed seat 10 and a connection side away from the fixed seat 10, and the fixed seat 10 is provided with a matching surface corresponding to the extrusion surface; the driving member 14 is connected to the mounting seat 11 and the driving end is connected to the connection side, for driving the movable pressure seat 13 to move closer to or away from the fixed seat 10; the auxiliary locking member 15 is connected to the mounting seat 11, which includes a locking end that can move closer to or away from the connection side.

[0038] In practical applications, multiple electrolytic chambers are stacked and placed between the mating surface of the fixed seat 10 and the extrusion surface of the movable pressure seat 13. The driving end of the driving member 14 can drive the movable pressure seat 13 to move closer to or away from the fixed seat 10. During the installation stage, the driving end drives the movable pressure seat 13 to move closer to the fixed seat 10. Under the joint extrusion of the extrusion surface and the mating surface, the multi-layer structure of the single electrolytic chamber and the chambers are compressed and sealed. After reaching the expected sealing state, the locking end of the auxiliary locking member 15 moves closer to the movable pressure seat 13 and is compressed with the connecting side of the movable pressure seat 13, thereby locking the movable pressure seat 13 in the expected position. During the maintenance or adjustment stage, the locking end of the auxiliary locking member 15 moves away from the movable pressure seat 13, and the movable pressure seat 13 is unlocked. The electrolytic cell can be inspected or adjusted after the gasket creep by driving the movable pressure seat 13 to move by the driving end.

[0039] Compared with the related art, by providing an auxiliary locking member 15, the movable pressure seat 13 can be locked in a compressed and sealed state, thereby effectively avoiding the problem of tank leakage caused by insufficient thrust of the driving member 14 and ensuring the sealing effect of the tank. At the same time, the reciprocating locking end of the auxiliary locking member 15 can cooperate with the driving end of the driving member 14, thereby improving the convenience of disassembly, assembly and adjustment of the tank.

[0040] According to different actual needs, the mating surface can be formed on one side or two opposite sides of the fixing seat 10. When the mating surface is formed on one side of the fixing seat 10, the mounting seat 11 and the movable pressing seat 13 are each provided with one corresponding one, thereby forming a single-sided extruder, which can extrude the groove body on one side (such as Figure 1 When the mating surfaces are formed on two opposite sides of the fixed seat 10, two mounting seats 11 and two movable pressing seats 13 are provided correspondingly, thereby forming a double-sided extruder that can extrude the grooves on both sides at the same time (such as Figure 2As shown). When the extruder is configured as a double-sided extruder, the cross beam 12 may be provided in two groups and distributed between two groups of mounting seats 11 and the fixing seat 10, or may be provided in one group and spanning across the two mounting seats 11. The above two types of extruders and arrangements may be flexibly designed according to actual needs.

[0041] In one embodiment of the present invention, the extruder is configured as a double-sided extruder, that is, the mating surfaces are formed on two opposite sides of the fixed seat 10, two groups of mounting seats 11 and movable pressing seats 13 are provided and distributed on two opposite sides of the fixed seat 10, one group of cross beams 12 is provided and spans across the two mounting seats 11, and the two movable pressing seats 13 share one group of cross beams 12. In this way, the extruder can extrude the trough bodies on both sides at the same time.

[0042] It is understandable that, whether it is a double-sided extruder or a single-sided extruder, the connection method of the various components in the extruder has not changed essentially. For the convenience of understanding and explanation, the embodiments of the present invention are explained by taking the components on one side of the extruder as an example.

[0043] In some optional embodiments, the specific material, shape, size, specification and structure of the mounting seat 11, the fixing seat 10 and the movable pressing seat 13 can be flexibly designed according to actual needs.

[0044] In one embodiment of the present invention, the mounting seat 11, the fixed seat 10 and the movable pressure seat 13 are all rectangular structures as a whole. The bottom of the mounting seat 11 and the fixed seat 10 are provided with supporting legs, which can be connected to the ground through connecting components such as bolts, thereby realizing the connection of the mounting seat 11 and the fixed seat 10 on the ground.

[0045] The mating surfaces are formed on both sides of the fixing seat 10 along the thickness direction, and the mounting seats 11 and the fixing seat 10 are arranged alternately in the thickness direction of the fixing seat 10. Two cross beams 12 are provided, and the two cross beams 12 are distributed on both sides of the fixing seat 10 adjacent to the mating surface, and the two cross beams 12 are arranged symmetrically with the center line of the fixing seat 10 as the center. In order to ensure the structural strength, the cross beam 12 is fixedly connected to the fixing seat 10 and the mounting seat 11.

[0046] Specifically, the cross beam 12 is attached to the sides of the fixing seat 10 and the mounting seat 11 and can be connected by connecting components such as bolts. In order to ensure the stability of the connection, multiple connecting components can be provided between the cross beam 12 and the fixing seat 10 and the mounting seat 11.

[0047] The movable pressure seat 13 is slidably supported on the crossbeam 12, and one side of the movable pressure seat 13 along the thickness direction faces the mating surface, forming the above-mentioned extrusion surface. The shape and specification of the extrusion surface are adapted to the mating surface, and in order to adapt to the shape of the electrolysis chamber, both are set to rectangular surfaces. When the movable pressure seat 13 slides close to or away from the fixed seat 10 driven by the driving member 14, the extrusion surface can move close to or away from the mating surface, thereby squeezing and sealing the electrolysis chamber.

[0048] In one embodiment of the present invention, in order to balance the pressure on the extrusion surface, the connection point between the driving end of the driving member 14 and the movable pressure seat 13 is located at the geometric center of the extrusion surface to ensure that the extrusion surface applies uniform force to the electrolytic chamber.

[0049] The driving member 14 and the mounting seat 11 may be connected by a flange or by other means, which is not specifically limited in the embodiment of the present invention.

[0050] Similarly, the driving end and the movable pressure seat 13 may be connected by a flange or other means, which is not specifically limited in the embodiment of the present invention.

[0051] Specifically, the driving member 14 includes a single master cylinder, and the master cylinder adopts a conventional large-thrust cylinder.

[0052] In actual work, the main oil cylinder pushes the movable pressure seat 13 to move closer to the fixed seat 10, so that the multi-layer structure of a single electrolysis chamber and the chambers reach the expected compression and sealing state, and then the locking end of the auxiliary locking piece 15 is compressed with the connecting side of the movable pressure seat 13 to lock the movable pressure seat 13 in the expected position.

[0053] In one embodiment of the present invention, there are multiple auxiliary locking pieces 15 surrounding the geometric center of the extrusion surface. With this arrangement, after the auxiliary locking piece 15 locks the movable pressure seat 13, the force balance of the movable pressure seat 13 can be ensured, and the movable pressure seat 13 can be leveled by adjusting the auxiliary locking pieces 15 at different positions.

[0054] Specifically, four auxiliary locking members 15 are provided, and the four auxiliary locking members 15 are distributed at diagonal positions of the extrusion surface.

[0055] According to different working principles, there are many options for the auxiliary locking member 15, such as a hydraulic cylinder with a mechanical locking function (such as the SLP series single-acting mechanical locking hydraulic cylinder, the CLL series single-acting locking nut hydraulic cylinder, etc.), a cylinder (such as the CLJ2, CLM2, CLG1, CL1 series, etc.) or an electric cylinder (EAS series, EGC series, SDE series, etc.). In addition, without considering the convenience of adjustment, the auxiliary locking member 15 can also use a manual threaded screw push rod to achieve the locking of the movable pressure seat 13 by utilizing the self-locking function of the threaded screw and the screw nut.

[0056] In one embodiment of the present invention, sliding components are provided on opposite sides of the movable press seat 13 , and the movable press seat 13 and the two beams 12 are slidably matched through the sliding components to ensure the stability and smoothness of the sliding of the movable press seat 13 .

[0057] In some optional embodiments, the sliding assembly can be selected as a roller structure, so that the movable pressure seat 13 can slide smoothly on the cross beam 12. However, it is found in actual applications that in order to ensure good insulation performance, an insulating plate, such as a PP insulating plate, is arranged on the upper part of the cross beam 12. When the movable pressure seat 13 slides, the roller is in line contact with the PP insulating plate on the upper part of the cross beam 12. The PP insulating plate is prone to cracking at the long-term pressure position, and there is a risk of short circuit after the insulating plate cracks. In addition, the roller structure is complicated to process.

[0058] To solve the above problems, refer to Figures 3 to 5 In one embodiment of the present invention, the sliding assembly includes a slide rail and a slider; wherein the slide rail is arranged on the beam 12 and arranged along the length direction of the beam 12, and the slide rail is provided with a first sliding surface; the slider is connected to the sliding pressure seat and has a second sliding surface at the bottom, and the second sliding surface is slidably supported on the first sliding surface, and at least one of the slide rail and the slider is made of insulating material.

[0059] Through the above technical solution, the slide rail and the slider adopt surface contact, which effectively avoids the problem of cracking of the insulating material and thus solves the short circuit problem. In addition, the processing of the slide rail and the slider is relatively simple, which can effectively reduce the processing cost.

[0060] In one embodiment of the present invention, in order to ensure the structural strength and stability of the sliding assembly, the slide rail is made of metal material, for example, it can be formed by bending a metal sheet such as stainless steel. The slider is made of insulating material, specifically, the slider can be made of PP (polypropylene), PA (polyamide), PU (polyurethane), PUA (polyurethane acrylate) and other materials.

[0061] In one embodiment of the present invention, the first sliding surface and the second sliding surface in the sliding assembly located on at least one side of the movable press seat 13 are set to be in contact with each other. By setting the first sliding surface and the second sliding surface to be in contact with each other, the sliding direction of the slider can be constrained so that the slider can only slide along the slide rail, effectively preventing the movable press seat 13 from running off during movement.

[0062] In one embodiment of the present invention, the two sides of the movable pressure seat 13 are respectively a first side and a second side. In the sliding component on the first side of the movable pressure seat 13, the first sliding surface and the second sliding surface are set to be in concave-convex surface contact; in the sliding component on the second side, the first sliding surface and the second sliding surface are set to be in plane contact.

[0063] In practical applications, if the sliders and the slide rails in the sliding assemblies on both sides are set to be in contact with the concave and convex surfaces, a very high processing accuracy is required to ensure that the sliders on both sides are simultaneously engaged with the slide rails at the corresponding positions, which greatly increases the processing difficulty. However, if the slider and the slide rail in the sliding assembly on only one side are set to be in contact with the concave and convex surfaces, and the other side is set to be in contact with the plane, it can not only constrain the sliding direction of the slider to prevent the movable pressure seat 13 from running off during the sliding process, but also provide a certain adjustment margin to ensure the engagement of the slider with the slide rail at the corresponding position, and the processing accuracy requirements are low, which greatly reduces the processing difficulty.

[0064] The specific structure and arrangement of the slide rail and the slider can be selected according to actual needs. In one embodiment of the present invention, for the convenience of understanding and explanation, the sliding assembly located on the first side of the movable pressure seat 13 is set as a first sliding assembly, the slide rail in the first sliding assembly is a first slide rail 20, and the slider is a first slider 21; the sliding assembly located on the second side of the movable pressure seat 13 is a second sliding assembly, the slide rail in the second sliding assembly is a second slide rail 30, and the slider is a second slider 31.

[0065] Specifically, the first slide rail 20 is protruded on the cross beam 12, and its cross-section is trapezoidal. Correspondingly, a trapezoidal groove 210 is provided at the bottom of the first slider 21. The first slide rail 20 is embedded in the groove 210, and the portion of the first slide rail 20 in contact with the groove 210 forms a first sliding surface. Similarly, the portion of the groove 210 in contact with the slide rail forms a second sliding surface, thereby forming a concave and convex surface fit between the first sliding surface and the second sliding surface.

[0066] Specifically, the angle of the acute angle at the lower part of the trapezoidal cross section can be set to 30 degrees to 60 degrees according to actual needs.

[0067] Of course, the first slide rail 20 and the first slider 21 include but are not limited to the structures or forms listed above. First slide rails 20 and first slider 21 of other forms or structures are also applicable as long as they can constrain the sliding direction of the first slider 21.

[0068] Specifically, the second slide rail 30 is protruded on the cross beam 12, and its cross section is rectangular and the upper surface is a plane; the bottom surface of the second slider 31 is a plane, and the bottom surface of the second slider 31 can be slidably supported on the upper surface of the second slide rail 30, forming a first sliding surface and a second sliding surface that are in sliding contact.

[0069] Similarly, the second slide rail 30 and the second slider 31 include but are not limited to the structures or forms listed above. Second slide rails 30 and second sliders 31 of other forms or structures are also applicable as long as they can achieve planar contact between the first sliding surface and the second sliding surface.

[0070] Through the above-mentioned technical solution, the first slide rail 20 and the first slider 21 can constrain the sliding of the movable pressure seat 13 to avoid deviation. The second slide rail 30 and the second slider 31 can provide a certain radial adjustment margin to ensure that the first slide rail 20 and the first slider 21 can be smoothly engaged. The processing accuracy requirements are low, which greatly reduces the processing difficulty.

[0071] Specifically, the slide rail is formed by bending a metal plate to form an internal hollow structure. A reinforcing rib is provided inside the slide rail. The bottom of the reinforcing rib is supported on the cross beam 12, and the top is supported on the bottom of the first sliding surface.

[0072] Specifically, the reinforcing ribs include a first reinforcing rib 22 arranged in the first slide rail 20, and a second reinforcing rib 32 arranged in the second slide rail 30; wherein, the first reinforcing rib 22 is provided with one, the upper side of which is supported on the bottom of the upper bottom of the first rail, and the lower side is supported on the beam 12; the second reinforcing ribs 32 are provided with two side by side, the upper side of the second reinforcing rib 32 is supported on the top surface of the second rail, and the lower side is supported on the beam 12.

[0073] In one embodiment of the present invention, the electrolytic cell extruder further comprises an adjustment mechanism for adjusting the pitch angle of the movable pressing seat 13. The pitch angle of the movable pressing seat 13 can be adjusted by the adjustment mechanism to ensure that the extrusion surface can fit the electrolytic chamber and ensure uniformity of force.

[0074] In one embodiment of the present invention, the adjustment mechanism includes a mounting box 40 and an adjusting bolt 41; wherein the mounting box 40 is fixedly connected to the side of the movable pressure seat 13, and an opening is provided at the bottom of the mounting box 40. In the direction of the opening, the slider can be slidably arranged in the mounting box 40 so that the first sliding surface at the bottom of the slider can be exposed through the opening and cooperate with the slide rail; two adjusting bolts 41 are provided, and in the extension direction of the cross beam 12, the two adjusting bolts 41 are distributed on both sides of the center of the slider, and the adjusting bolt 41 is threadedly connected to the mounting box 40 and the end thereof passes through the mounting box 40 and acts on the side of the slider away from the first sliding surface.

[0075] Specifically, the size of the inner cavity of the installation box 40 is larger than the size of the slider, thereby ensuring a certain adjustment margin.

[0076] In practical applications, by controlling the screwing depth of the two adjusting bolts 41 , the distance of the two ends of the slider extending out of the bottom opening of the mounting box 40 can be adjusted in the extending direction of the slide rail, thereby adjusting the pitch angle of the movable pressure seat 13 .

[0077] In one embodiment of the present invention, after the angle is adjusted to the right position, in order to prevent the adjusting bolt 41 from loosening due to the vibration of the device, the adjusting mechanism further includes a locking nut 42, which is threadedly connected to the adjusting bolt 41, and the bottom of the locking nut 42 is used to abut against the installation box 40. Through the locking nut 42, after the angle is adjusted to the right position, the locking nut 42 is tightened, and the bottom of the locking nut 42 is tightly abutted against the installation box 40, preventing the adjusting bolt 41 from loosening under the action of the pre-tightening force.

[0078] In actual applications, since the contact surface between the adjusting bolt 41 and the slider is small, this will cause the end of the adjusting bolt 41 to apply a large local stress to the slider, which may easily cause damage to the slider.

[0079] In order to solve the above problem, in one embodiment of the present invention, the adjustment mechanism further includes a pad 43, which is arranged in the installation box 40 and between the adjustment bolt 41 and the slider. The pad 43 can avoid direct contact between the adjustment bolt 41 and the slider, thereby protecting the slider.

[0080] Specifically, the pad 43 is made of metal material.

[0081] In one embodiment of the present invention, the installation box 40 is fixedly connected to the side of the movable pressure seat 13 by welding, and in order to ensure the stability of the connection of the installation box 40, a reinforcing plate 44 is connected between the installation box 40 and the movable pressure seat 13.

[0082] It is to be understood that, without mutual contradiction, those skilled in the art may combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification.

[0083] The compacting method of the electrolytic cell extruder provided by the present invention is described below. The compacting method of the electrolytic cell extruder described below and the electrolytic cell extruder described above can be referred to each other.

[0084] A pressing method for an electrolytic cell extruder is applicable to the pressing of the electrolytic cell. The pressing working conditions of the electrolytic cell at least include installation working conditions and airtightness test working conditions.

[0085] The installation process includes the following steps: S1. Determine the target position of the movable pressing seat 13 and the target stroke of the driving end corresponding to the target position in the displacement control mode.

[0086] S2, controlling the driving member 14 to move and push the movable pressing seat 13 to the target position.

[0087] S3, controlling the locking end of the auxiliary locking member 15 to move close to the movable pressing seat 13 to a position of a first preset distance.

[0088] During the installation condition, switch to the displacement control mode. After all the end frames of the electrolytic cell are installed in place in the electrolytic cell extruder, the main cylinder pushes the movable pressure seat 13 to slide to the target position. The target position of the movable pressure seat 13 can be calculated based on the compression rate of the sealing gaskets between the end frames. The target stroke of the main cylinder can be determined by the target position of the movable pressure seat 13. The displacement of the main cylinder can be collected by the displacement sensor and controlled by the displacement signal to ensure that the main cylinder can push the movable pressure seat 13 to the target position.

[0089] By adopting displacement control, the main oil cylinder can be controlled more simply and intuitively to ensure the sealing between the multi-layer structure of a single electrolytic chamber of the electrolytic cell and between the chambers. After the main oil cylinder pushes the movable pressure seat 13 to the target position, the locking end of the auxiliary locking member 15 is controlled to move close to the movable pressure seat 13 to a position of a first preset distance. Specifically, the first preset distance is 10-20 mm to ensure that sufficient adjustment margin is reserved.

[0090] The airtight test conditions include the following steps: S10, during the pressurization phase, when it is determined in the displacement control mode that the actual position of the movable press seat 13 deviates from the target position, the driving end is controlled to move so that the movable press seat 13 remains at the target position.

[0091] S11, during the pressure-maintaining stage, after determining that the pressure in the tank body reaches the test pressure, the mode is switched to the pressure control mode. In the pressure control mode, the pressure at the driving end under the test pressure is obtained as the preset pressure.

[0092] S12. After determining that the actual pressure deviates from the preset pressure, control the movement of the driving end to keep the actual pressure at the preset pressure.

[0093] During the pressurization stage, the pressure in the electrolytic cell is changing, so the main cylinder still uses displacement variable control to ensure the sealing performance of the electrolytic cell. When the displacement sensor detects that the piston rod of the main cylinder has a displacement greater than 1mm from the target stroke, the system replenishes or releases pressure on the cylinder to ensure that the position of the movable pressure seat 13 is consistent with the target position.

[0094] During the pressure holding stage, the gasket may produce a certain amount of creep deformation, which may affect the accuracy of displacement control. Therefore, when the pressure in the tank body reaches the test pressure, the main oil cylinder switches from displacement control to pressure control, and the pressure at the driving end under the test pressure is used as the preset pressure. When the actual pressure of the main oil cylinder on the tank body deviates from the preset pressure, the system replenishes or releases the pressure of the main oil cylinder to keep the actual pressure at the preset pressure, thereby ensuring the sealing performance.

[0095] During the entire airtight test phase, the locking end of the auxiliary locking member 15 and the movable pressure seat 13 are always kept at 10-20 mm.

[0096] In one embodiment of the present invention, the compacting condition of the electrolytic cell further includes an operating condition, and the operating condition includes the following steps: S100, during the pressure-increasing stage, when it is determined in the displacement control mode that the actual position of the movable pressure seat 13 deviates from the target position, the driving end is controlled to move so that the movable pressure seat 13 is kept at the target position; S101, during the voltage stabilization and temperature rise phase, after determining that the actual pressure of the driving end deviates from the preset pressure in the pressure control mode, the driving end is controlled to move so that the actual pressure remains at the preset pressure; S102, after determining that the hydrogen side outlet of the electrolyzer reaches the set temperature, controlling the locking end to move close to the movable pressure seat 13 to a position of a second preset distance; S103, after determining that the temperature of the electrolytic cell has reached the rated operating temperature and has been running stably for a set time, control the locking end and the movable pressure seat 13 to be pressed tightly, and reduce the pressure of the driving end to a set value.

[0097] During the pressure-increasing stage, the pressure in the electrolytic cell changes, so the main oil cylinder still uses the displacement control mode. After detecting that the main oil cylinder has displacement collapse (>1mm), it will be automatically corrected. The locking end of the auxiliary locking member 15 and the movable pressure seat 13 are always maintained at the first set distance.

[0098] During the temperature-pressure rising stage, the gasket may creep and affect the accuracy of displacement control. Therefore, the pressure control mode is switched to the pressure control mode during the pressure stabilization and temperature rising stage. The current pressure value of the system is used as the preset pressure. When the actual pressure collected by the main cylinder through the pressure sensor deviates from the preset pressure, the movement of the drive end is controlled to keep the actual pressure at the preset pressure.

[0099] After determining that the hydrogen side outlet of the electrolyzer reaches the set temperature, specifically about 15-20°C lower than the rated operating temperature, the locking end is controlled to move close to the movable pressure seat 13 to a position of a second preset distance, the specific second preset distance is 1-2mm, to reserve a certain adjustment margin.

[0100] After the temperature of the electrolytic cell reaches the rated operating temperature and runs stably for a set time, for example, after running stably for 4 hours, the gasket generally no longer produces creep deformation, and the locking end is controlled to move close to the movable pressure seat 13 and press against the movable pressure seat 13 to reduce the hydraulic system oil pressure to the set value.

[0101] In one embodiment of the present invention, the compacting working condition of the electrolytic cell also includes a maintenance working condition, and the maintenance working condition includes the following steps: When it is determined that the locking end does not press against the movable pressing seat 13, the control mode of the driving member 14 is determined; When it is determined that the driving member 14 is in the displacement control mode, the locking end is controlled to press against the movable pressing seat 13; When it is determined that the driving member 14 is in the pressure control mode, the locking end is controlled to press against the movable pressure seat 13, and the driving end is controlled to move so that the pressure is reduced to the set value.

[0102] In one embodiment of the present invention, the maintenance working condition further includes the following steps: During the liquid discharge and displacement stage, the mode is switched to the displacement control mode, and the locking end is controlled to press against the movable pressure seat 13 .

[0103] In one embodiment of the present invention, the maintenance working condition further includes the following steps: When it is determined that the temperature drop of the hydrogen side outlet is greater than a preset value, the driving end is controlled to move to a preset pressure; Control the locking end to move away from the movable pressing seat 13 to a position of a second preset distance; When the temperature is stable, the locking end is controlled to move close to the movable pressure seat 13 and press against the movable pressure seat 13, thereby reducing the pressure of the driving end to a set value.

[0104] Specifically, the preset value is 5°C.

[0105] Through the electrolytic cell extruder, pressing method and electrolytic cell provided by the embodiments of the present invention, the auxiliary locking member 15 can lock the movable pressure seat 13 in the pressed and sealed state, effectively avoiding the leakage of the cell body caused by insufficient thrust of the driving member 14, and ensuring the sealing effect of the cell body. At the same time, the reciprocating locking end of the auxiliary locking member 15 can cooperate with the driving end of the driving member 14, thereby improving the convenience of disassembly, assembly and adjustment of the cell body.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrolytic cell extruder, characterized in that: include: Fixed seat (10); A mounting seat (11) is provided on at least one side of the fixing seat (10) and is arranged alternately with the fixing seat (10); A crossbeam (12) arranged between the fixing seat (10) and the mounting seat (11); A movable pressing seat (13) is slidably arranged on the crossbeam (12) and can move along the crossbeam (12) toward or away from the mounting seat (11); the movable pressing seat (13) is provided with an extrusion surface facing the fixed seat (10) and a connection side facing away from the fixed seat (10), and the fixed seat (10) is provided with a matching surface corresponding to the extrusion surface; A driving member (14), connected to the mounting seat (11) and having a driving end connected to the connecting side, for driving the movable pressing seat (13) to move closer to or away from the fixed seat (10); An auxiliary locking member (15) is connected to the mounting seat (11), and the auxiliary locking member (15) comprises a locking end that can move toward or away from the connecting side.

2. The electrolytic cell extruder according to claim 1, characterized in that: The movable pressing seat (13) is provided with a first side and a second side opposite to each other, wherein the first side and the second side are adjacent to the pressing surface; Two cross beams (12) are arranged, and the two cross beams (12) are respectively slidably matched with the first side and the second side through a sliding component.

3. The electrolytic cell extruder according to claim 2, characterized in that: The sliding assembly comprises: A slide rail, arranged on the crossbeam (12) and arranged along the length direction of the crossbeam (12), the slide rail being provided with a first sliding surface; A slider is connected to the movable pressure seat (13) and has a second sliding surface at the bottom. The second sliding surface is slidably supported on the first sliding surface. At least one of the slide rail and the slider is made of insulating material.

4. The electrolytic cell extruder according to claim 3, characterized in that: The first sliding surface and the second sliding surface in the sliding component located at at least one of the first side and the second side are configured to be in concave-convex surface contact.

5. The electrolytic cell extruder according to claim 4, characterized in that: In the sliding assembly on the first side of the movable pressure seat (13), the first sliding surface and the second sliding surface are in concave-convex surface contact; in the sliding assembly on the second side, the first sliding surface and the second sliding surface are in flat surface contact; Preferably, the slide rail is convexly arranged on the crossbeam (12); Preferably, in the sliding assembly on the first side, the cross-section of the slide rail is trapezoidal, a trapezoidal groove (210) is provided on the slider, the slide rail is engaged with the groove (210), and the contact portion between the slide rail and the groove (210) forms the first sliding surface and the second sliding surface in which concave and convex surfaces are engaged; Preferably, the slide rail is formed by bending and is hollow inside, and a reinforcing rib is provided inside the slide rail; the bottom of the reinforcing rib is supported on the cross beam (12), and the top is supported on the bottom of the first sliding surface.

6. The electrolytic cell extruder according to any one of claims 3 to 5, characterized in that: It also includes an adjustment mechanism for adjusting the pitch angle of the movable pressure seat (13); Preferably, the adjustment mechanism comprises: A mounting box (40) is fixedly connected to the side of the movable pressure seat (13), and an opening is provided at the bottom of the mounting box (40). In the direction of the opening, the slider is slidably arranged in the mounting box (40), so that the first sliding surface at the bottom of the slider can be exposed from the opening and cooperate with the slide rail; There are two adjusting bolts (41), and in the extension direction of the slide rail, the two adjusting bolts (41) are distributed on both sides of the center of the slide block; the adjusting bolts (41) are threadedly connected to the installation box (40) and the ends of the adjusting bolts (41) penetrate into the installation box (40) and act on the side of the slide block away from the first sliding surface; Preferably, the adjustment mechanism further comprises a locking nut (42); the locking nut (42) is threadedly connected to the adjustment bolt (41), and the bottom of the locking nut (42) is used to abut against the installation box (40); Preferably, the adjustment mechanism further comprises a pad (43); the pad (43) is arranged in the installation box (40) and located between the adjustment bolt (41) and the sliding block.

7. An electrolytic cell, characterized in that: It comprises the electrolytic cell extruder as described in any one of claims 1-6.

8. A compacting method for an electrolytic cell extruder, characterized in that: Applicable to the compacting working condition of the electrolytic cell, the compacting working condition of the electrolytic cell at least includes the installation working condition and the airtightness test working condition; The installation condition includes the following steps: Determining a target position of a movable pressing seat (13) and a target stroke of a driving end corresponding to the target position in a displacement control mode; Controlling the driving member to push the movable pressing seat (13) to a target position; Controlling the locking end of the auxiliary locking member (15) to move close to the movable pressing seat (13) to a position of a first preset distance; The airtight test condition comprises the following steps: In the pressurizing stage, when it is determined in the displacement control mode that the actual position of the movable press seat (13) deviates from the target position, the driving end is controlled to move so that the movable press seat (13) is maintained at the target position; During the pressure-maintaining stage, when it is determined that the pressure in the tank reaches the test pressure, the mode is switched to the pressure control mode, in which the current pressure of the driving end is obtained as the preset pressure; After determining that the actual pressure of the driving end deviates from the preset pressure, the driving end is controlled to move so that the actual pressure is maintained at the preset pressure.

9. The compacting method of the electrolytic cell extruder according to claim 8, characterized in that: The working condition of the electrolytic cell also includes an operating condition; the operating condition includes the following steps: In the boost phase, when it is determined in the displacement control mode that the actual position of the movable pressure seat (13) deviates from the target position, the driving end is controlled to move so that the movable pressure seat (13) remains at the target position; In the voltage stabilization and temperature rise stage, the current pressure of the driving end is obtained as the preset pressure in the pressure control mode, and after determining that the actual pressure of the driving end deviates from the preset pressure, the driving end is controlled to move so that the actual pressure remains at the preset pressure; After determining that the hydrogen side outlet of the electrolyzer reaches a set temperature, controlling the locking end to move close to the movable pressing seat (13) to a position of a second preset distance; After it is determined that the temperature of the electrolytic cell reaches the rated operating temperature and has been running stably for a set time, the locking end is controlled to be pressed against the movable pressure seat (13) to reduce the pressure of the driving end to a set value.

10. The compacting method of the electrolytic cell extruder according to claim 9, characterized in that: The working condition of the electrolytic cell also includes a maintenance working condition; the maintenance working condition includes the following steps: When it is determined that the locking end is not pressed against the movable pressing seat (13), determining the control mode of the driving member (14); When it is determined that the driving member (14) is in a displacement control mode, the locking end is controlled to press against the movable pressing seat (13); When it is determined that the driving member (14) is in the pressure control mode, the locking end is controlled to press against the movable pressure seat (13), and the driving end is controlled to move so that the pressure is reduced to a set value; Preferably, the maintenance operation also includes the following steps: During the liquid discharge and displacement phase, the mode is switched to a displacement control mode, and the locking end is controlled to press against the movable pressing seat (13); Preferably, the maintenance working condition further includes the following steps: When it is determined that the hydrogen side outlet temperature drops more than a preset value, controlling the driving end to move to the preset pressure; Controlling the locking end to move away from the movable pressing seat (13) to a position at the second preset distance; When the temperature is stable, the locking end is controlled to be pressed against the movable pressure seat (13), and the pressure of the driving end is reduced to a set value.

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