Electrolytic bath extruder and electrolytic bath

Abstract

The utility model relates to the technical field of electrolytic hydrogen production equipment, and provides an electrolytic bath extruding machine 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] This utility model relates to the technical field of electrolytic hydrogen production equipment, and in particular to an electrolytic cell extruder and an electrolytic cell. Background Technology

[0002] Currently, with the introduction of the national dual-carbon strategy, the number of megawatt-level green hydrogen demonstration projects in China is gradually increasing, and ultra-large-scale off-grid hydrogen production from green electricity (GW-level green hydrogen plants) will become the future development trend. In response to the demand for such large-scale hydrogen production, domestic and foreign manufacturers have launched large-format alkaline electrolyzers. Currently, there are two main types of large-format alkaline electrolyzer structures: traditional circular tanks and square alkaline tanks.

[0003] The square alkaline electrolytic cell is composed of multiple electrolytic chambers stacked together. Each electrolytic chamber includes a bipolar plate, an anode, a sealing gasket, a diaphragm, a sealing gasket, a cathode, a bipolar plate, and an electrolyte flow channel. The multi-layer structure of a single electrolytic chamber must be sealed together, as must the chambers themselves. Therefore, multiple electrolytic chambers must be stacked and compressed together.

[0004] Currently, there are two common stacking and pressing methods for square alkaline electrolytic cells: one is screw fastening and pressing, and the other is hydraulic cylinder pressing.

[0005] However, in the aforementioned technologies, the tightening torque of the fastening screws needs to be manually controlled, which cannot guarantee complete consistency. Furthermore, the large number of fastening screws makes disassembly and assembly inconvenient. Additionally, the clamping force is difficult to adjust after the gaskets undergo creep. As for the hydraulic cylinder tightening method, if the cylinder pressure drops due to internal leakage or other reasons, the piston rod of the hydraulic cylinder will shift, leading to leakage in the groove.

[0006] Therefore, how to reduce the difficulty of disassembling and adjusting the equipment while ensuring the sealing effect of the tank is an important issue that urgently needs to be addressed. Utility Model Content

[0007] This utility model provides an electrolytic cell extruder and an electrolytic cell to solve the defects of the prior art, such as the difficulty in disassembling and adjusting the cell body and the difficulty in guaranteeing the sealing effect. It can reduce the difficulty of disassembling and adjusting the electrolytic cell while ensuring the sealing effect of the cell body.

[0008] This utility model provides an electrolytic cell extrusion press, comprising:

[0009] Fixed base;

[0010] The mounting base is disposed on at least one side of the fixing base and is arranged alternately with the fixing base;

[0011] A crossbeam is disposed between the fixed base and the mounting base;

[0012] The movable pressure seat is slidably disposed on the crossbeam and can move along the crossbeam toward or away from the mounting seat; the movable pressure seat has a pressing surface facing the fixed seat and a connecting side away from the fixed seat, and the fixed seat has a mating surface corresponding to the pressing surface;

[0013] A driving component, connected to the mounting base and with its driving end connected to the connecting side, is used to drive the movable pressure seat to move closer to or away from the fixed base;

[0014] An auxiliary locking element is connected to the mounting base, and the auxiliary locking element includes a locking end that can move toward or away from the connection side.

[0015] According to the present invention, an electrolytic cell extrusion machine is provided, wherein multiple auxiliary locking members are evenly distributed around the geometric center of the extrusion surface.

[0016] According to the present invention, an electrolytic cell extrusion press is provided, wherein the movable pressure base is provided with a first side and a second side, the first side and the second side being adjacent to the extrusion surface;

[0017] Two crossbeams are provided, and the two crossbeams slide and engage with the first side and the second side respectively through sliding components.

[0018] According to the present invention, an electrolytic cell extruder is provided, wherein the sliding assembly includes:

[0019] A slide rail is provided on the crossbeam and arranged along the length of the crossbeam, and the slide rail is provided with a first sliding surface;

[0020] The slider is connected to the movable pressure seat and has a second sliding surface at its 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.

[0021] According to the present invention, in an electrolytic cell extrusion machine, the first sliding surface and the second sliding surface in the sliding assembly located on at least one of the first side and the second side are configured to have concave-convex surface contact.

[0022] According to the present invention, in the sliding assembly on the first side of the movable pressure seat, the first sliding surface and the second sliding surface are in concave-convex contact; in the sliding assembly on the second side, the first sliding surface and the second sliding surface are in planar contact.

[0023] According to the present invention, an electrolytic cell extrusion machine is provided, wherein the slide rail protrudes from the crossbeam;

[0024] According to the present invention, in the sliding assembly on the first side, the slide rail has a trapezoidal cross-section, the slider has a trapezoidal groove, the slide rail is fitted with the groove, and the contact portion is formed as a first sliding surface and a second sliding surface with concave and convex surfaces fitted together.

[0025] According to the present invention, an electrolytic cell extrusion machine is provided, wherein the slide rail is formed by bending and is hollow inside, and the slide rail is provided with reinforcing ribs; the bottom of the reinforcing ribs is supported on the crossbeam, and the top is supported on the bottom of the first sliding surface.

[0026] According to the present invention, an electrolytic cell extruder also includes an adjustment mechanism for adjusting the pitch angle of the movable pressure seat;

[0027] Preferably, the adjustment mechanism includes:

[0028] The mounting box is fixedly connected to the side of the movable pressure seat. The bottom of the mounting box has an opening. The slider is slidably disposed in the mounting box with the opening facing upwards, so that the first sliding surface at the bottom of the slider can be exposed to the opening and cooperate with the slide rail.

[0029] Two adjusting bolts are provided, located on both sides of the center of the slider in the extension direction of the slide rail; the adjusting bolts are threaded to the mounting box and their ends pass through the mounting box and act on the side of the slider away from the first sliding surface;

[0030] Preferably, the adjusting mechanism further includes a locking nut; the locking nut is threaded onto the adjusting bolt, and the bottom of the locking nut is used to abut against the mounting box;

[0031] Preferably, the adjustment mechanism further includes a pad; the pad is disposed inside the mounting box and located between the adjustment bolt and the slider.

[0032] Preferably, a reinforcing plate is connected between the mounting box and the movable pressure seat.

[0033] This utility model also provides an electrolytic cell, including the electrolytic cell extruder described in any one of the above.

[0034] This utility model also provides a pressing method for an electrolytic cell extruder, which is applicable to the pressing conditions of an electrolytic cell. The pressing conditions of the electrolytic cell include at least the installation conditions and the airtightness test conditions.

[0035] The installation process includes the following steps:

[0036] In displacement control mode, the target position of the active pressure seat and the target stroke of the drive end corresponding to the target position are determined;

[0037] Controlling the movement of the drive end pushes the movable pressure seat to the target position;

[0038] The locking end of the auxiliary locking component is controlled to move close to the movable pressure seat to a position of a first preset distance;

[0039] The airtightness test conditions include the following steps:

[0040] During the pressurization phase, when the actual position of the movable pressure seat deviates from the target position in the displacement control mode, the drive end is controlled to move so that the movable pressure seat is kept in the target position.

[0041] During the pressure holding phase, when the pressure inside the tank reaches the test pressure, switch to pressure control mode. In pressure control mode, the current pressure at the drive end is obtained as the preset pressure.

[0042] After determining that the actual pressure at the drive end deviates from the preset pressure, the movement of the drive end is controlled to keep the actual pressure at the preset pressure.

[0043] According to the pressing method of the electrolytic cell extruder provided by this utility model, the working condition of the electrolytic cell also includes a running condition; the running condition includes the following steps:

[0044] During the pressurization phase, when the actual position of the movable pressure seat deviates from the target position in the displacement control mode, the drive end is controlled to move so that the movable pressure seat is kept in the target position.

[0045] During the pressure stabilization and heating stage, the current pressure of the drive end is obtained as the preset pressure in the pressure control mode. After determining that the actual pressure of the drive end deviates from the preset pressure, the movement of the drive end is controlled to keep the actual pressure at the preset pressure.

[0046] After determining that the hydrogen side outlet of the electrolyzer has reached the set temperature, control the locking end to move close to the movable pressure seat to a position of the second preset distance;

[0047] After confirming that the temperature of the electrolytic cell has reached the rated operating temperature and has been running stably for a set time, the locking end is controlled to press against the movable pressure seat, and the pressure of the driving end is reduced to the set value.

[0048] According to the pressing method of the electrolytic cell extruder provided by this utility model, the operating conditions of the electrolytic cell also include a maintenance condition; the maintenance condition includes the following steps:

[0049] If it is determined that the locking end is not pressed against the movable pressure seat, the control mode of the driving component is determined;

[0050] When the drive component is determined to be in displacement control mode, the locking end is controlled to press against the movable pressure seat;

[0051] When the drive unit is determined to be in pressure control mode, the locking end is controlled to press against the movable pressure seat, and the drive end is controlled to move to reduce the pressure to the set value.

[0052] Preferably, the maintenance procedure further includes the following steps:

[0053] During the drainage and replacement phase, switch to displacement control mode to control the locking end to press against the movable pressure seat;

[0054] Preferably, the maintenance condition further includes the following steps:

[0055] When the hydrogen-side outlet temperature drops more than a preset value, the drive end is controlled to move to the preset pressure.

[0056] Control the locking end to move away from the movable pressure seat to a position of the second preset distance;

[0057] Once the temperature stabilizes, the locking end is pressed against the movable pressure seat, reducing the pressure at the drive end to the set value.

[0058] The electrolytic cell extruder and electrolytic cell provided by this utility model, by setting an auxiliary locking component, can lock the movable pressure seat under the pressure and sealing state, effectively avoiding the problem of cell leakage caused by insufficient thrust of the driving component, and ensuring the sealing effect of the cell. At the same time, the locking end of the auxiliary locking component, which can reciprocate, can cooperate with the driving end of the driving component, improving the convenience of disassembly, assembly and adjustment of the cell. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the 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.

[0060] Figure 1 This is one of the structural schematic diagrams of the electrolytic cell extruder provided in this embodiment of the utility model.

[0061] Figure 2 This is the second structural schematic diagram of the electrolytic cell extruder provided in this embodiment of the utility model.

[0062] Figure 3 This is a schematic diagram of the structure of the movable pressure seat provided in an embodiment of this utility model.

[0063] Figure 4 This is a schematic diagram of the sliding component and adjustment mechanism on the first side of the movable pressure seat provided in this embodiment of the utility model.

[0064] Figure 5 This is a schematic diagram of the sliding component and adjustment mechanism on the second side of the movable pressure seat provided in this embodiment of the utility model.

[0065] Figure label:

[0066] 10. Fixed seat; 11. Mounting seat; 12. Crossbeam; 13. Movable pressure seat; 14. Driving component; 15. Auxiliary locking component; 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 Implementation

[0067] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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 scope of protection of this utility model.

[0068] With the introduction of the national dual-carbon strategy, large-scale green hydrogen projects are increasing in China, and the technology of large-scale alkaline electrolyzers has also made significant progress. Currently, the mainstream structures of large-scale alkaline electrolyzers include the traditional circular cell and the square alkaline cell.

[0069] The square alkaline electrolytic cell is composed of multiple electrolytic chambers stacked together. Each electrolytic chamber includes a bipolar plate, an anode, a sealing gasket, a diaphragm, a sealing gasket, a cathode, a bipolar plate, and an electrolyte flow channel. The multi-layer structure of a single electrolytic chamber must be sealed together, as must the chambers themselves. Therefore, multiple electrolytic chambers must be stacked and compressed together.

[0070] Currently, there are two common stacking and pressing methods for square alkaline electrolytic cells: one is screw fastening and pressing, and the other is hydraulic cylinder pressing.

[0071] However, the tightening torque of the fastening screws needs to be manually controlled, which cannot be guaranteed to be completely consistent. In addition, there are many fastening screws, making disassembly and assembly inconvenient. Furthermore, after the gaskets creep, the clamping force is difficult to adjust. As for the hydraulic cylinder tightening method, if the cylinder pressure drops due to internal leakage or other reasons, the piston rod of the hydraulic cylinder will displace, causing leakage in the groove.

[0072] Therefore, how to reduce the difficulty of disassembling and adjusting the equipment while ensuring the sealing effect of the tank is an important issue that urgently needs to be addressed.

[0073] To address the aforementioned problems, this utility model provides an electrolytic cell extruder and an electrolytic cell, which can reduce the difficulty of disassembling, assembling, and adjusting the electrolytic cell while ensuring the sealing effect of the cell.

[0074] The following combination Figure 1-Figure 5 This invention describes the electrolytic cell extruder and the electrolytic cell.

[0075] Reference Figure 1 An electrolytic cell extrusion press includes a fixed base 10, a mounting base 11, a crossbeam 12, a movable pressure seat 13, a driving member 14, and an auxiliary locking member 15. The mounting base 11 is located on at least one side of the fixed base 10 and is arranged alternately with the fixed base 10. The crossbeam 12 is arranged between the fixed base 10 and the mounting base 11. The movable pressure seat 13 is slidably mounted on the crossbeam 12 and can move along the crossbeam 12 towards or away from the mounting base 11. The movable pressure seat 13 has an extrusion surface facing the fixed base 10 and a connecting side away from the fixed base 10. The fixed base 10 has a mating surface corresponding to the extrusion surface. The driving member 14 is connected to the mounting base 11, and its driving end is connected to the connecting side, for driving the movable pressure seat 13 towards or away from the fixed base 10. The auxiliary locking member 15 is connected to the mounting base 11 and includes a locking end that can move towards or away from the connecting side.

[0076] In practical applications, multiple electrolytic cells are stacked between the mating surface of the fixed base 10 and the pressing surface of the movable pressure base 13. The driving end of the driving component 14 can drive the movable pressure base 13 to move closer to or away from the fixed base 10. During installation, the driving end drives the movable pressure base 13 closer to the fixed base 10. Under the combined pressing of the pressing surface and the mating surface, the multi-layer structure of each individual electrolytic cell and the cells themselves are compressed and sealed. After achieving the desired sealing state, the locking end of the auxiliary locking component 15 moves closer to the movable pressure base 13 and presses against the connecting side of the movable pressure base 13, thereby locking the movable pressure base 13 in the desired position. During maintenance or adjustment, the locking end of the auxiliary locking component 15 moves away from the movable pressure base 13, unlocking the movable pressure base 13. The electrolytic cell can then be inspected or adjusted after gasket creep by driving the movable pressure base 13 with the driving end.

[0077] Compared with related technologies, by setting the auxiliary locking component 15, the movable pressure seat 13 can be locked under the pressure and sealing state, which effectively avoids the leakage problem of the tank caused by insufficient thrust of the driving component 14, and ensures the sealing effect of the tank. At the same time, the locking end of the auxiliary locking component 15, which can reciprocate, can cooperate with the driving end of the driving component 14, improving the convenience of tank disassembly, assembly and adjustment.

[0078] Depending on the specific requirements, the mating surface can be formed on one side or both opposite sides of the fixed base 10. When the mating surface is formed on one side of the fixed base 10, both the mounting base 11 and the movable pressure base 13 are correspondingly provided, thus forming a single-sided extruder capable of extruding the groove on one side (e.g., Figure 1 (As shown). When the mating surfaces are formed on opposite sides of the fixed base 10, two mounting bases 11 and two movable pressure bases 13 are respectively provided, thus forming a double-sided extruder, which can simultaneously extrude the grooves on both sides (as shown). Figure 2 (As shown). When the extruder is configured as a double-sided extruder, the crossbeam 12 can be provided in two sets and distributed between the two sets of mounting seats 11 and fixed seats 10, or it can be provided in one set and span the two mounting seats 11. The above two forms of extruders and their arrangements can be flexibly designed according to actual needs.

[0079] In one embodiment of this utility model, the extruder is configured as a double-sided extruder, that is, the mating surfaces are formed on opposite sides of the fixed base 10. Two sets of mounting bases 11 and movable pressure seats 13 are provided and distributed on opposite sides of the fixed base 10. One set of crossbeams 12 spans across the two mounting bases 11, and the two movable pressure seats 13 share one set of crossbeams 12. In this way, the extruder can simultaneously extrude the grooves on both sides.

[0080] It is understandable that, regardless of whether it is a double-sided extruder or a single-sided extruder, the connection method of each component in the extruder has not changed in essence. For ease of understanding and explanation, this utility model embodiment will use the components on one side of the extruder as an example for illustration.

[0081] In some alternative embodiments, the specific materials, shapes, dimensions, and structures of the mounting base 11, the fixed base 10, and the movable pressure base 13 can be flexibly designed according to actual needs.

[0082] In one embodiment of this utility model, the mounting base 11, the fixed base 10, and the movable pressure base 13 are all rectangular structures. The bottom of the mounting base 11 and the fixed base 10 are provided with support legs. The support legs can be connected to the ground by bolts or other connecting components, thereby realizing the connection of the mounting base 11 and the fixed base 10 on the ground.

[0083] The mating surfaces are formed on both sides of the fixing seat 10 along its thickness direction. The mounting seat 11 and the fixing seat 10 are arranged alternately along the thickness direction of the fixing seat 10. Two crossbeams 12 are provided, distributed on both sides of the fixing seat 10 adjacent to the mating surfaces, and symmetrically arranged with the center line of the fixing seat 10 as the center. To ensure structural strength, the crossbeams 12 are fixedly connected to the fixing seat 10 and the mounting seat 11.

[0084] Specifically, the crossbeam 12 can be connected to the side of the fixed seat 10 and the mounting seat 11 by bolts or other connecting components. In order to ensure the stability of the connection, multiple connecting components can be provided between the crossbeam 12 and the fixed seat 10 and the mounting seat 11.

[0085] 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 extrusion surface described above. The shape and specifications of the extrusion surface and the mating surface are adapted to each other, and in order to adapt to the shape of the electrolysis chamber, both are set as rectangular surfaces. When the movable pressure seat 13 slides closer to or away from the fixed seat 10 under the drive of the drive member 14, the extrusion surface can move closer to or away from the mating surface, thereby extruding and sealing the electrolysis chamber.

[0086] In one embodiment of this utility model, in order to make the pressure on the extrusion surface even, the connection point between the drive end of the drive member 14 and the movable pressure seat 13 is located at the geometric center of the extrusion surface, so as to ensure that the extrusion surface applies force evenly to the electrolytic chamber.

[0087] The drive component 14 and the mounting base 11 can be connected by a flange or by other means. No specific restrictions are imposed in this embodiment of the utility model.

[0088] Similarly, the drive end and the movable pressure seat 13 can be connected by a flange or by other means, and no specific limitation is made in this embodiment of the utility model.

[0089] Specifically, the drive component 14 includes a single main hydraulic cylinder, which is a conventional high-thrust hydraulic cylinder.

[0090] In actual operation, the main hydraulic cylinder pushes the movable pressure seat 13 closer to the fixed seat 10, so that the multi-layer structure of the individual electrolysis chamber and the chambers reach the expected compression and sealing state. Then, the locking end of the auxiliary locking member 15 is pressed against the connecting side of the movable pressure seat 13, locking the movable pressure seat 13 in the expected position.

[0091] In one embodiment of this utility model, there are multiple auxiliary locking members 15 around the geometric center of the extrusion surface. With this arrangement, after the auxiliary locking members 15 lock the movable pressure seat 13, the force on the movable pressure seat 13 can be balanced, and the movable pressure seat 13 can be leveled by adjusting the auxiliary locking members 15 at different positions.

[0092] Specifically, there are four auxiliary locking elements 15, which are distributed diagonally on the extrusion surface.

[0093] Depending on the different working principles, the auxiliary locking component 15 can be selected in various ways. For example, it can be a hydraulic cylinder with 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 pneumatic 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 ease of adjustment, the auxiliary locking component 15 can also be a manual threaded screw push rod, which uses the self-locking function of the threaded screw and screw nut to lock the movable pressure seat 13.

[0094] In one embodiment of this utility model, sliding components are provided on opposite sides of the movable pressure seat 13. The movable pressure seat 13 and the two crossbeams 12 slide and cooperate through the sliding components to ensure the stability and smoothness of the sliding of the movable pressure seat 13.

[0095] In some alternative embodiments, the sliding component can be a roller structure, allowing the movable pressure seat 13 to slide smoothly on the crossbeam 12. However, in practical applications, it has been found that to ensure good insulation performance, an insulating plate, such as a PP insulating plate, is arranged on the upper part of the crossbeam 12. When the movable pressure seat 13 slides, the roller and the PP insulating plate on the upper part of the crossbeam 12 are in line contact. The PP insulating plate is prone to cracking at the pressure point over a long period of time, and there is a risk of short circuit after the insulating plate cracks. In addition, the roller structure is complex to manufacture.

[0096] 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 disposed on the crossbeam 12 and arranged along the length direction of the crossbeam 12, and the slide rail is provided with a first sliding surface; the slider is connected to the sliding pressure seat and is provided with a second sliding surface at its bottom, 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.

[0097] Through the above technical solution, the slide rail and slider adopt surface contact, which effectively avoids the problem of insulation material cracking, thereby solving the short circuit problem. In addition, the slide rail and slider are relatively simple to process, which can effectively reduce processing costs.

[0098] In one embodiment of this utility model, to ensure the structural strength and stability of the sliding assembly, the slide rail is made of metal material, such as stainless steel sheet bent into shape. The slider is made of insulating material; specifically, the slider can be made of materials such as PP (polypropylene), PA (polyamide), PU (polyurethane), or PUA (polyurethane acrylate).

[0099] In one embodiment of this invention, the first sliding surface and the second sliding surface in the sliding assembly located on at least one side of the movable pressure seat 13 are configured to have concave-convex surface contact. By configuring the first sliding surface and the second sliding surface to have concave-convex surface contact, the sliding direction of the slider can be constrained, ensuring that the slider can only slide along the slide rail, effectively preventing the movable pressure seat 13 from deviating during movement.

[0100] In one embodiment of this utility model, the two sides of the movable pressure seat 13 are a first side and a second side, respectively. In the sliding assembly of the first side of the movable pressure seat 13, the first sliding surface and the second sliding surface are configured to have concave-convex surface contact; in the sliding assembly of the second side, the first sliding surface and the second sliding surface are configured to have planar contact.

[0101] In practical applications, if the sliders and slide rails in both sliding components are designed with concave-convex surface contact, very high machining precision is required to ensure that the sliders on both sides simultaneously engage with the corresponding slide rails, greatly increasing the machining difficulty. However, by designing the slider and slide rail in only one sliding component with concave-convex surface contact and the other side with planar contact, the sliding direction of the slider can be constrained to prevent the movable pressure seat 13 from deviating during sliding, and a certain adjustment margin can be provided to ensure the engagement of the slider with the corresponding slide rail. This reduces the machining precision requirements and greatly decreases the machining difficulty.

[0102] The specific structure and arrangement of the slide rail and slider can be selected according to actual needs. In one embodiment of this utility model, for ease of understanding and explanation, the sliding component located on the first side of the movable pressure seat 13 is designated as the first sliding component, the slide rail in the first sliding component is the first slide rail 20, and the slider is the first slider 21; the sliding component located on the second side of the movable pressure seat 13 is designated as the second sliding component, the slide rail in the second sliding component is the second slide rail 30, and the slider is the second slider 31.

[0103] Specifically, the first slide rail 20 protrudes from the crossbeam 12 and has a trapezoidal cross section. Correspondingly, the bottom of the first slider 21 is provided with a trapezoidal groove 210. The first slide rail 20 is embedded in the groove 210. The part of the first slide rail 20 that contacts the groove 210 forms the first sliding surface. Similarly, the part of the groove 210 that contacts the slide rail forms the second sliding surface, so that the first sliding surface and the second sliding surface form a concave-convex surface fit together.

[0104] Specifically, the angle of the acute angle at the bottom of the trapezoidal cross-section can be set to 30 degrees to 60 degrees according to actual needs.

[0105] Of course, the first slide rail 20 and the first slider 21 include, but are not limited to, the structures or forms listed above. Any other forms or structures of the first slide rail 20 and the first slider 21 that can constrain the sliding direction of the first slider 21 are also applicable.

[0106] Specifically, the second slide rail 30 protrudes from the crossbeam 12, has a rectangular cross-section and a flat upper surface; the bottom surface of the second slider 31 is flat, and the bottom surface of the second slider 31 is 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.

[0107] Similarly, the second slide rail 30 and the second slider 31 include, but are not limited to, the structures or forms listed above. Any other forms or structures of the second slide rail 30 and the second slider 31 that can achieve contact between the first sliding surface and the second sliding surface are also applicable.

[0108] Through the above 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 fitted together. The requirements for machining accuracy are low, which greatly reduces the machining difficulty.

[0109] Specifically, the slide rail is made of bent metal plate to form a hollow structure. Reinforcing ribs are provided inside the slide rail. The bottom of the reinforcing ribs is supported on the crossbeam 12, and the top is supported on the bottom of the first sliding surface.

[0110] Specifically, the reinforcing ribs include a first reinforcing rib 22 disposed within the first slide rail 20 and a second reinforcing rib 32 disposed within the second slide rail 30; wherein, there is one first reinforcing rib 22, the upper side of which is supported on the bottom of the first track and the lower side of which is supported on the crossbeam 12; two second reinforcing ribs 32 are disposed side by side, the upper side of which is supported on the top surface of the second track and the lower side of which is supported on the crossbeam 12.

[0111] In one embodiment of this utility model, the electrolytic cell extruder further includes an adjustment mechanism for adjusting the pitch angle of the movable pressure seat 13. The adjustment mechanism allows for adjustment of the pitch angle of the movable pressure seat 13, ensuring that the extrusion surface fits snugly against the electrolytic chamber and guaranteeing uniform force distribution.

[0112] In one embodiment of this utility model, the adjustment mechanism includes a mounting box 40 and adjusting bolts 41. The mounting box 40 is fixedly connected to the side of the movable pressure seat 13. The bottom of the mounting box 40 has an opening. The slider is slidably disposed inside the mounting box 40 with the opening facing upwards, so that the first sliding surface of the bottom of the slider can be exposed to the opening and cooperate with the slide rail. There are two adjusting bolts 41. In the extension direction of the crossbeam 12, the two adjusting bolts 41 are distributed on both sides of the center of the slider. The adjusting bolts 41 are threadedly connected to the mounting box 40 and their ends pass through the mounting box 40 and act on the side of the slider away from the first sliding surface.

[0113] Specifically, the inner cavity of the mounting box 40 is larger than the size of the slider, thus ensuring a certain adjustment margin.

[0114] In practical applications, by controlling the screwing depth of the two adjusting bolts 41, the distance between the two ends of the slider extending out of the bottom opening of the mounting box 40 can be adjusted in the extension direction of the slide rail, thereby adjusting the pitch angle of the movable pressure seat 13.

[0115] In one embodiment of this utility model, after the angle is adjusted to the correct position, to prevent the adjusting bolt 41 from loosening due to equipment vibration, the adjusting mechanism also includes a locking nut 42. The locking nut 42 is threaded onto the adjusting bolt 41, and the bottom of the locking nut 42 is used to abut against the mounting box 40. After the angle is adjusted to the correct position using the locking nut 42, tightening the locking nut 42 will cause the bottom of the locking nut 42 to abut against the mounting box 40, preventing the adjusting bolt 41 from loosening under the action of preload.

[0116] In practical applications, because the contact area between the adjusting bolt 41 and the slider is small, the local stress applied to the slider by the end of the adjusting bolt 41 is relatively large, which can easily lead to damage to the slider.

[0117] To address the aforementioned problems, in one embodiment of this invention, the adjusting mechanism further includes a pad 43, which is disposed within the mounting box 40 and located between the adjusting bolt 41 and the slider. The pad 43 prevents direct contact between the adjusting bolt 41 and the slider, thereby protecting the slider.

[0118] Specifically, the pad 43 is made of metal.

[0119] In one embodiment of the present invention, the mounting 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 mounting box 40, a reinforcing plate 44 is connected between the mounting box 40 and the movable pressure seat 13.

[0120] It is understood that, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0121] The pressing method of the electrolytic cell extruder provided by this utility model is described below. The pressing method of the electrolytic cell extruder described below can be referred to in correspondence with the electrolytic cell extruder described above.

[0122] A pressing method for an electrolytic cell extruder, applicable to the pressing of electrolytic cells, wherein the pressing conditions of the electrolytic cell include at least installation conditions and airtightness test conditions.

[0123] The installation process includes the following steps:

[0124] S1. In displacement control mode, determine the target position of the movable pressure seat 13 and the target stroke of the drive end corresponding to the target position.

[0125] S2, control the movement of the drive component 14 to push the movable pressure seat 13 to the target position.

[0126] S3. Control the locking end of the auxiliary locking member 15 to move close to the movable pressure seat 13 to a position of the first preset distance.

[0127] During installation, switching to displacement control mode, after all end frames of the electrolytic cell are installed in the electrolytic cell extruder, the main hydraulic 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 ratio of the sealing gaskets between each end frame. The target stroke of the main hydraulic cylinder can be determined by the target position of the movable pressure seat 13. The displacement of the main hydraulic cylinder can be collected by the displacement sensor and controlled by the displacement signal to ensure that the main hydraulic cylinder can push the movable pressure seat 13 to the target position.

[0128] By employing displacement control, the main hydraulic cylinder can be controlled more simply and intuitively, ensuring the sealing between the multi-layered structure of the individual electrolysis chambers in the electrolytic cell and between the chambers themselves. After the main hydraulic cylinder pushes the movable pressure seat 13 to the target position, it controls the locking end of the auxiliary locking member 15 to move close to the movable pressure seat 13 to a position of a first preset distance. Specifically, the first preset distance is 10-20mm, to ensure sufficient adjustment margin.

[0129] The airtightness test includes the following steps:

[0130] S10, Pressurization stage: When the actual position of the movable pressure seat 13 deviates from the target position in the displacement control mode, the drive end is controlled to move so that the movable pressure seat 13 is kept in the target position.

[0131] S11, Pressure Holding Stage: After confirming that the pressure inside the tank has reached the test pressure, switch to pressure control mode. In pressure control mode, the pressure at the drive end under the test pressure is obtained as the preset pressure.

[0132] S12. After determining that the actual pressure deviates from the preset pressure, control the movement of the drive end to keep the actual pressure at the preset pressure.

[0133] During the pressurization stage, the pressure inside the electrolytic cell is changing. Therefore, 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 pressurizes or depressurizes the cylinder to ensure that the position of the movable pressure seat 13 is consistent with the target position.

[0134] During the pressure holding stage, the gasket may undergo some creep deformation, which may affect the accuracy of displacement control. Therefore, when the pressure in the tank reaches the test pressure, the main hydraulic cylinder switches from displacement control to pressure control, using the pressure at the drive end under the test pressure as the preset pressure. When the actual pressure of the main hydraulic cylinder on the tank deviates from the preset pressure, the system replenishes or releases pressure on the main hydraulic cylinder to keep the actual pressure at the preset pressure, thereby ensuring sealing performance.

[0135] Throughout the entire airtightness test, the locking end of the auxiliary locking component 15 and the movable pressure seat 13 remained within 10-20 mm.

[0136] In one embodiment of this utility model, the pressing condition of the electrolytic cell also includes an operating condition, which includes the following steps:

[0137] S100, during the pressurization stage, when the actual position of the movable pressure seat 13 deviates from the target position in the displacement control mode, the drive end is controlled to move so that the movable pressure seat 13 is kept in the target position.

[0138] S101, During the pressure stabilization and heating stage, in the pressure control mode, after determining that the actual pressure at the drive end deviates from the preset pressure, the drive end is controlled to move so that the actual pressure is maintained at the preset pressure.

[0139] S102. After confirming that the hydrogen side outlet of the electrolyzer has reached the set temperature, control the locking end to move close to the movable pressure seat 13 to the position of the second preset distance.

[0140] S103. After confirming 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 to press against the movable pressure seat 13 and reduce the pressure of the drive end to the set value.

[0141] During the pressurization stage, the pressure inside the electrolytic cell changes, so the main cylinder still adopts the displacement control mode. After detecting that the main cylinder has displacement collapse (>1mm), it is automatically corrected. The locking end of the auxiliary locking part 15 and the movable pressure seat 13 are always kept at the first set distance.

[0142] During the temperature and pressure rise stage, the gasket may creep, affecting the accuracy of displacement control. Therefore, during the pressure stabilization and temperature rise stage, the system switches to pressure control mode, using the current pressure value of the system as the preset pressure. When the actual pressure collected by the pressure sensor by the main cylinder deviates from the preset pressure, the drive end is controlled to move so that the actual pressure is maintained at the preset pressure.

[0143] After determining that the hydrogen side outlet of the electrolyzer has reached the set temperature, specifically when it is about 15-20°C lower than the rated operating temperature, control the locking end to move close to the movable pressure seat 13 to a position of the second preset distance, specifically 1-2mm, to reserve a certain adjustment margin.

[0144] After the temperature of the electrolytic cell reaches the rated operating temperature and stabilizes for a set time, such as 4 hours, the gasket will generally no longer creep or deform. Control the locking end to move close to the movable pressure seat 13 and press it against the movable pressure seat 13, reducing the hydraulic system oil pressure to the set value.

[0145] In one embodiment of this utility model, the pressing condition of the electrolytic cell also includes a maintenance condition, which includes the following steps:

[0146] If it is determined that the locking end is not pressed against the movable pressure seat 13, determine the control mode of the drive component 14;

[0147] When the drive component 14 is in displacement control mode, the locking end is controlled to press against the movable pressure seat 13.

[0148] When the drive unit 14 is in pressure control mode, the locking end is controlled to press against the movable pressure seat 13, and the drive end is controlled to move to reduce the pressure to the set value.

[0149] In one embodiment of this utility model, the maintenance process further includes the following steps:

[0150] During the drainage and replacement phase, switch to displacement control mode to control the locking end to press against the movable pressure seat 13.

[0151] In one embodiment of this utility model, the maintenance process further includes the following steps:

[0152] When the temperature drop at the hydrogen outlet exceeds a preset value, control the drive end to move to the preset pressure.

[0153] Control the locking end to move away from the movable pressure seat 13 to a position of the second preset distance;

[0154] Once the temperature stabilizes, the locking end moves closer to the movable pressure seat 13 and presses against it, reducing the pressure at the drive end to the set value.

[0155] Specifically, the preset value is 5℃.

[0156] With the electrolytic cell extruder and electrolytic cell provided in this embodiment of the utility model, the auxiliary locking member 15 can lock the movable pressure seat 13 under the pressure and sealing state, which effectively avoids the problem of cell leakage caused by insufficient thrust of the driving member 14, and ensures the sealing effect of the cell. At the same time, the locking end of the auxiliary locking member 15, which can reciprocate, can cooperate with the driving end of the driving member 14, improving the convenience of disassembly, assembly and adjustment of the cell.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electrolytic cell extrusion press, characterized in that, include: Fixture (10); Mounting base (11) is provided on at least one side of the fixing base (10) and arranged alternately with the fixing base (10); A crossbeam (12) is arranged between the fixed seat (10) and the mounting seat (11); The movable pressure seat (13) is slidably disposed on the crossbeam (12) and can move along the crossbeam (12) to approach or move away from the mounting seat (11); the movable pressure seat (13) is provided with a pressing surface facing the fixed seat (10) and a connecting side away from the fixed seat (10); the fixed seat (10) is provided with a mating surface corresponding to the pressing surface; A driving component (14) is connected to the mounting base (11) and its driving end is connected to the connecting side, for driving the movable pressure seat (13) to move closer to or away from the fixed base (10); An auxiliary locking member (15) is connected to the mounting base (11), and the auxiliary locking member (15) includes a locking end that can move toward or away from the connection side.

2. The electrolytic cell extruder according to claim 1, characterized in that, The movable pressure seat (13) is provided with a first side and a second side, the first side and the second side being adjacent to the extrusion surface; Two crossbeams (12) are provided, and the two crossbeams (12) slide and cooperate with the first side and the second side respectively through sliding components.

3. The electrolytic cell extruder according to claim 2, characterized in that, The sliding component includes: A slide rail is provided on the crossbeam (12) and arranged along the length of the crossbeam (12), and the slide rail is provided with a first sliding surface; The slider is connected to the movable pressure seat (13) and has a second sliding surface at its 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 assembly located on at least one of the first side and the second side are configured to have 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 contact; in the sliding assembly on the second side, the first sliding surface and the second sliding surface are in planar contact.

6. The electrolytic cell extruder according to claim 5, characterized in that, In the sliding assembly on the first side, the slide rail has a trapezoidal cross section, the slider has a trapezoidal groove (210), the slide rail is fitted with the groove (210), and the contact portion between the slide rail and the groove (210) is formed as a first sliding surface and a second sliding surface with concave and convex surfaces fitted together.

7. The electrolytic cell extruder according to any one of claims 3 to 6, characterized in that, It also includes an adjustment mechanism for adjusting the pitch angle of the movable pressure seat (13); the adjustment mechanism includes: The mounting box (40) is fixedly connected to the side of the movable pressure seat (13). The bottom of the mounting box (40) is provided with an opening. The slider is slidably disposed in the mounting box (40) with the opening facing upwards, so that the first sliding surface at the bottom of the slider can be exposed to the opening and cooperate with the slide rail. Two adjusting bolts (41) are provided. In the extension direction of the slide rail, the two adjusting bolts (41) are distributed on both sides of the center of the slider. The adjusting bolts (41) are threadedly connected to the mounting box (40) and their ends pass through the mounting box (40) and act on the side of the slider away from the first sliding surface.

8. The electrolytic cell extruder according to claim 7, characterized in that, The adjustment mechanism also includes a locking nut (42); the locking nut (42) is threaded onto the adjustment bolt (41), and the bottom of the locking nut (42) is used to abut against the mounting box (40).

9. The electrolytic cell extruder according to claim 8, characterized in that, The adjustment mechanism also includes a pad (43); the pad (43) is disposed inside the mounting box (40) and located between the adjustment bolt (41) and the slider.

10. An electrolytic cell, characterized in that, Including the electrolytic cell extruder as described in any one of claims 1-9.

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