Electrolytic tank locking device and control method thereof

Abstract

The invention discloses an electrolytic bath locking device which comprises a fixed end plate, a movable end plate and a cross beam which are sequentially arranged side by side, an electrolytic bath is arranged between the fixed end plate and the movable end plate, the fixed end plate and the cross beam are fixedly arranged, and two opposite side ends of the fixed end plate and the cross beam are fixedly connected into a whole through a pair of cross beams. The two side ends of the movable end plate are connected with guide rails arranged on the pair of girders in a sliding fit mode through sliding blocks, a hydraulic oil cylinder is arranged on the cross beam, a piston rod of the hydraulic oil cylinder penetrates through the cross beam and then is connected to the movable end plate, and the hydraulic oil cylinder provides pressing force to lock the electrolytic cell. The pressing device has the advantages that the pressing effect is good, the electrolytic cell polar plate single piece can be pressed, and an electrolytic cell has good sealing performance; and meanwhile, quick separation of the faulted single polar plate can be realized, and the on-site maintenance time of the electrolytic single polar plate is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production by alkaline water. More specifically, the present invention relates to an electrolytic cell locking device and a control method thereof. Background Art

[0002] In an alkaline electrolytic cell, hydrogen ions and hydroxide ions generated by electrolyzing water react differently at the anode and cathode, and finally hydrogen, oxygen, and water are generated. It is widely used in fields such as green power to produce green hydrogen, energy storage, chemical industry, and metallurgy. The working pressure of the electrolytic stack has a great influence on the outlet pressure of the product hydrogen. Increasing the working pressure of the electrolytic stack can effectively improve the hydrogen storage efficiency at the rear end. However, increasing the working pressure of the electrolytic cell will increase the leakage risk of the electrolytic cell compartment, which may cause serious environmental pollution and safety accidents. There is an urgent need to develop a device with good pressing effect that can press the single plates of the electrolytic cell electrodes, so that the electrolytic cell has good sealing performance. At the same time, the device can also achieve rapid separation of the faulty electrodes, saving the maintenance time on-site for a single electrolytic cell plate.

[0003] There are mainly two existing ways of fastening and separating electrolytic cells at home and abroad, specifically:

[0004] (1) During the fastening process of a circular electrolytic cell, pre-pressing is carried out through a pressing assembly device, and then fastening is carried out through fasteners such as bolts, screws, and disc springs; during the separation process, the fasteners used to fasten the electrolytic cell are removed in sequence, and then maintenance can be carried out on a single electrolytic cell plate.

[0005] (2) A square electrolytic cell is pressed by a hydraulic press, and self-locking is completed through mechanical locking after pressing; during the separation process, the mechanical locking is released, the hydraulic press is loosened, and the faulty electrode plate is separated by an iron chain or a steel wire rope.

[0006] The main existing problems are:

[0007] (1) For the maintenance of a faulty electrode plate in a circular electrolytic cell, the whole stack needs to be removed, which is troublesome and has a long cycle. The fastening force of a single electrolytic cell plate is provided by fasteners, and the local stress of the single electrolytic cell plate is uneven, which is easy to cause leakage and damage to the single electrolytic cell plate.

[0008] (2) For a square electrolytic cell, an iron chain or a steel wire rope is used to separate the faulty electrode plate. The installation of the separation tooling is time-consuming and laborious, seriously affecting the maintenance efficiency of the electrolytic stack. Summary of the Invention

[0009] An object of the present invention is to provide an electrolytic cell locking device and a control method thereof, which solve the technical problems such as poor fastening reliability and long maintenance cycle of the current electrolytic cell, and have the advantages of good pressing effect, capable of pressing the single plates of the electrolytic cell electrodes, so that the electrolytic cell has good sealing performance; at the same time, it can also achieve rapid separation of a single faulty electrode plate, saving the maintenance time on-site for a single electrolytic cell plate.

[0010] To solve the above technical problems, the present invention provides an electrolytic cell locking device, which includes a fixed end plate, a movable end plate and a cross beam arranged side by side in sequence. The electrolytic cell is arranged between the fixed end plate and the movable end plate. The fixed end plate and the cross beam are both fixedly arranged, and the two opposite side ends are fixedly connected into one body through a pair of large beams. Both side ends of the movable end plate are slidably connected with the guide rails arranged on the pair of large beams by setting sliders. A hydraulic cylinder is arranged on the cross beam, and its piston rod passes through the cross beam and is connected to the movable end plate. The electrolytic cell is locked by the pressing force provided by the hydraulic cylinder.

[0011] Preferably, the piston rod is provided with a thread, and a locking mechanism is fitted thereon. The locking mechanism includes a hollow shell and a lock nut, a worm gear and a worm arranged inside it. The lock nut is threadedly sleeved on the piston rod. The worm gear is fixedly sleeved outside the lock nut. The worm is engaged with the worm gear. The worm is driven to rotate by a hydraulic motor. One side of the lock nut facing the cross beam protrudes outside the hollow shell.

[0012] Preferably, the hydraulic cylinder is provided with hydraulic oil by a hydraulic station, and the pressing force of the hydraulic cylinder on the electrolytic cell is controlled by an electric control cabinet.

[0013] Preferably, protruding lifting lugs are arranged on both opposite sides of the electrolytic cell, and they are slidably sleeved on the large beams through the guide rails.

[0014] Preferably, stoppers are arranged at both opposite ends of the large beam, and they respectively abut against the cross beam and the fixed end plate.

[0015] Preferably, the end of the piston rod is a protruding spherical surface, and a concave spherical hole that matches the spherical surface at the end of the piston rod is arranged at the center of the movable end plate. The end of the piston rod and the movable end are bolted together through a flange.

[0016] Preferably, a separation mechanism is also provided, which includes separation units arranged oppositely on the outer sides of a pair of large beams. The separation unit includes a movable end plate pull rod arm and a fixed end plate pull rod arm respectively fixedly connected to the side ends of the movable end plate and the fixed end plate, an inner pull rod and an outer pull rod connecting the movable end plate pull rod arm and the fixed end plate pull rod arm, an inner separation arm and an outer separation arm respectively arranged on the inner pull rod and the outer pull rod; one end of the inner pull rod is fixedly connected to the fixed end plate pull rod arm, and the other end is slidably connected to the movable end plate pull rod arm; one end of the outer pull rod is fixedly connected to the movable end plate pull rod arm, and the other end is slidably connected to the fixed end plate pull rod arm; the inner separation arm is slidably arranged on the inner pull rod, and the outer separation arm is slidably arranged on the outer pull rod.

[0017] Preferably, a one-way locking lock head and a spring are provided in both the inner separation arm and the outer separation arm to enable the inner separation arm and the outer separation arm to slide or lock on the inner pull rod and the outer pull rod.

[0018] The present invention also provides a control method for an electrolytic cell locking device. A strain gauge is provided at the end of the piston rod for monitoring the compression force of the electrolytic cell. A displacement sensor is correspondingly provided on the movable end plate for monitoring the displacement of the movable end plate. The strain gauge and the displacement sensor are both connected to an electric control cabinet, and the electric control cabinet also monitors the hydraulic oil pressure; the electric control cabinet monitors the compression force of the electrolytic cell obtained by the strain gauge and compares it with the designed target value. If the designed value is reached, the hydraulic cylinder is controlled to stop operating, otherwise it continues to operate; the maximum displacement of the movable end plate and the maximum value of the hydraulic oil pressure are set in the electric control cabinet. When monitoring the compression force of the electrolytic cell, the displacement of the movable end plate and whether the hydraulic oil pressure reaches the designed maximum value are monitored simultaneously. If either reaches the maximum value, the hydraulic cylinder is controlled to stop operating.

[0019] Preferably, sensors are provided at both the end of the piston rod where the thread is located and the crossbeam plane, and the sensors are all connected to the electric control cabinet for monitoring the displacement of the locking mechanism.

[0020] The present invention has at least the following beneficial effects:

[0021] (1) The device of the present invention can compress each single plate of the electrolytic cell electrodes, and the compression effect is good; the hydraulic cylinder provides the compression force, making the internal force of the electrolytic cell uniform, and the sealing effect is better during the operation of the electrolytic cell.

[0022] (2) The separation mechanism included in the device of the present invention enables each single plate of the electrolytic cell electrodes to be separated without the need to remove the whole stack, without affecting the state of other single plates of the electrodes, realizing the rapid separation of the faulty electrode plates, saving the on-site maintenance time of each single plate of the electrolytic cell electrodes; and the separation process is controlled by the electric control cabinet and the process is simple and easy to operate.

[0023] (3) The device and control method of the present invention are applicable to the locking and fastening of square alkaline electrolytic water hydrogen production electrolytic cells. The control of the electric control cabinet replaces the traditional manual control, and has the advantages of high automation degree, high working stability, and saving labor costs, and has broad application prospects.

[0024] Other advantages, objectives, and features of the present invention will be partially reflected by the following description, and partially will be understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall assembly structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall blasting structure of the present invention;

[0027] Figure 3 Schematic diagram of the assembly structure of the locking mechanism of the present invention;

[0028] Figure 4 Enlarged view of the structure of the locking mechanism of the present invention;

[0029] Figure 5 Enlarged view of the structure of the end of the piston rod of the present invention;

[0030] Figure 6 Schematic diagram of the structure of the separation mechanism of the present invention;

[0031] Figure 7 Control flow chart of the electric control cabinet of the present invention.

[0032] Explanation of reference numerals:

[0033] 1. Fixed end plate, 2. Movable end plate, 3. Cross beam, 4. Electrolytic cell, 5. Girder, 6. Hydraulic cylinder, 7. Piston rod, 8. Thread, 9. Locking mechanism, 91. Hollow housing, 92. Hydraulic motor, 93. Worm, 94. Worm gear, 95. Lock nut, 10. Lifting lug, 11. Stopper, 12. Spherical surface, 13. Flange, 14. Separation mechanism, 141. Movable end plate pull rod arm, 142. Fixed end plate pull rod arm, 143. Inner pull rod, 144. Outer pull rod, 145. Inner separation arm, 146. Outer separation arm, 147. Lock head, 15. Slide block. Detailed implementation manners

[0034] In order to better understand the purpose, structure and function of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0035] It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present invention, the orientation or positional relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0036] Such as Figure 1 and Figure 2As shown in the figure, the present invention provides an electrolytic cell 4 locking device, which includes a fixed end plate 1, a movable end plate 2 and a cross beam 3 arranged side by side in sequence. The electrolytic cell 4 is arranged between the fixed end plate 1 and the movable end plate 2. The fixed end plate 1 and the cross beam 3 are both fixedly arranged, and the two opposite side ends are fixedly connected into a whole through a pair of large beams 5. Both side ends of the movable end plate 2 are slidably connected with the guide rails arranged on the pair of large beams 5 through the setting of sliders 15. A hydraulic cylinder 6 is arranged on the cross beam 3, and its piston rod 7 passes through the cross beam 3 and is then connected to the movable end plate 2. The electrolytic cell 4 is locked by the pressing force provided by the hydraulic cylinder 6.

[0037] The electrolytic cells 4 are distributed in the middle of the movable end plate 2 and the fixed end plate 1, and there are lifting lugs 10 on both the left and right opposite sides thereof that cooperate with the left and right large beams 5; the hydraulic cylinder 6 is fixedly installed on the end face of the cross beam 3; one end of the piston rod 7 forms a sliding pair with the cylinder, and at the same time the piston rod 7 passes through the cross beam 3, and the other end thereof is fixedly connected to the movable end plate 2. One end of the large beam 5 is fixedly connected to the cross beam 3, and the other end is fixedly connected to the fixed end plate 1; sliders 15 that cooperate with the guide rails of the large beam 5 are arranged on both the left and right sides of the movable end plate 2. The shapes of the guide rails on the pair of large beams 5 can be set differently, so as to facilitate the distinction between the anode and the cathode during the single-piece assembly of the electrode plates and avoid reverse assembly.

[0038] At present, the fastening force of the single electrolytic sheet of the existing electrolytic cell 4 is provided by fasteners, and the local stress of the single electrode plate is uneven, which is easy to cause leakage and damage of the single piece; the electrolytic cell 4 locking device proposed by the present invention provides a pressing force by the hydraulic cylinder 6, and this pressing method provides a uniform pressing force for the single electrode plate, reducing the risk of damage to the single electrode plate. During the assembly process of the existing circular electrolytic cell 4 at present, vertical assembly is adopted, and the process of installing the electrode plate on the limiting member is complicated and time-consuming, resulting in low assembly efficiency of the electrolytic cell 4; the new electrolytic cell 4 provided by the present invention adopts the horizontal assembly as shown in Figure 1 the figure during the assembly process, the locking process is simple and rapid, and the assembly efficiency of the electrolytic cell 4 is high.

[0039] In another embodiment, as shown in Figure 3 and Figure 4 the figure, a thread 8 is arranged on the piston rod 7, and a locking mechanism 9 is fitted thereon. The locking mechanism 9 includes a hollow housing 91 and a lock nut 95, a worm gear 94 and a worm 93 arranged inside it. The lock nut 95 is threadedly sleeved on the piston rod 7, the worm gear 94 is fixedly sleeved outside the lock nut 95, the worm 93 is engaged with the worm gear 94, the worm 93 is driven to rotate by a hydraulic motor 92, and one side of the lock nut 95 facing the cross beam 3 protrudes outside the hollow housing 91.

[0040] After the hydraulic cylinder 6 is compressed and locked, the pressure is generally not maintained directly by the hydraulic oil. In addition, the hydraulic oil may leak or release pressure, such as damage to the sealing ring, valve, etc., resulting in a reduction in the unloading force of the compression force. Therefore, mechanical locking is achieved by setting a locking mechanism 9 after the compression is completed. The surface of the piston rod 7 is processed with a thread 8, and the thread 8 cooperates with the locking mechanism 9. The locking mechanism 9 can reciprocate along the axial direction of the piston rod 7 through the transmission of the thread 8. When the piston rod 7 moves forward and compresses, the locking mechanism 9 moves forward together. When the locking mechanism 9 is basically in contact with the side of the crossbeam 3, even if the pressure is released and the piston rod 7 has a retraction action, it cannot be rotated on the thread 8 of the piston rod 7 due to the obstruction of the locking mechanism 9, which can block the retraction of the piston rod 7 and avoid the unloading of the compression force.

[0041] The hydraulic motor 92 drives the worm 93 to rotate, and drives the worm wheel 94 to rotate. The worm wheel 94 is fixed with the lock nut 95, and the lock nut 95 is connected with the piston rod 7 thread 8. The lock nut 95 can realize rotating movement on the piston rod 7, and stops when it moves close to the cross beam 3. The hydraulic cylinder 6 can release pressure, and the piston rod 7 will not retract when it is locked. The contact between the lock nut 95 and the cross beam 3 realizes the required clamping force state for locking the electrolytic cell 4. The end face of the lock nut 95 protrudes outside the hollow shell 91 of the locking mechanism 9, and the hollow shell 91 does not contact the cross beam 3. A guide rod is arranged between the hollow shell 91 and the cross beam 3 to guide the movement process of the locking structure 9.

[0042] In another embodiment, the hydraulic cylinder 6 is provided with hydraulic oil through a hydraulic station, and the pressing force of the hydraulic cylinder 6 on the electrolytic cell 4 is controlled by an electric control cabinet. The hydraulic station provides the hydraulic cylinder 6 with the driving hydraulic oil required for movement; the action process of the electrolytic stack hydraulic locking device is controlled by the electric control cabinet, and the manual operation and automatic operation of the whole process of pressing and releasing the electrolytic stack can be realized.

[0043] In another embodiment, the electrolytic cell 4 is provided with protruding lifting ears 10 on opposite sides, which are slidably mounted on the beam 5 through guide rails. The several plates contained in the electrolytic cell 4 are slidably connected to the beam 5 through the lifting ears 10, and are convenient to move when they are pressed by the hydraulic cylinder 6.

[0044] In another embodiment, the two opposite ends of the beam 5 are provided with blocks 11, which respectively press against the cross beam 3 and the fixed end plate 1. When the hydraulic cylinder 6 is actuated to push the movable end plate 2 to move, the cross beam 3 is subjected to a force to the left, and the fixed end plate 1 is subjected to a force to the right. This force is transferred to the beam 5 through four blocks 11 on both sides and absorbed by the beam 5, and the beam 5 is in a tension state on both sides.

[0045] In another embodiment, Figure 5As shown, the end of the piston rod 7 is a protruding spherical surface 12, and a concave spherical hole that mates with the spherical surface 12 at the end of the piston rod 7 is provided at the center of the movable end plate 2 to achieve spherical surface 12 contact. The end of the piston rod 7 and the movable end are bolted together through a flange 13. That is, after the spherical surface 12 is fitted into the concave surface, the movable end plate 2 is pressed by the combination of two plates and bolted together.

[0046] In another embodiment, as Figure 6 shown, a separating mechanism 14 is further provided, which includes separating units oppositely arranged on the outer sides of a pair of girders 5. The separating units include a movable end plate pull rod arm 141 and a fixed end plate pull rod arm 142 respectively fixedly connected to the side ends of the movable end plate 2 and the fixed end plate 1, an inner pull rod 143 and an outer pull rod 144 connecting the movable end plate pull rod arm 141 and the fixed end plate pull rod arm 142, and inner separating arms 145 and outer separating arms 146 respectively arranged on the inner pull rod 143 and the outer pull rod 144; one end of the inner pull rod 143 is fixedly connected to the fixed end plate pull rod arm 142, and the other end is slidably connected to the movable end plate pull rod arm 141 relatively; one end of the outer pull rod 144 is fixedly connected to the movable end plate pull rod arm 141, and the other end is slidably connected to the fixed end plate pull rod arm 142 relatively; the inner separating arm 145 is slidably arranged on the inner pull rod 143, and the outer separating arm 146 is slidably arranged on the outer pull rod 144.

[0047] The alkaline electrolytic cell 4 is composed of a number of single plates of the electrode plates connected in series. The single plates of the electrode plates are pressed and locked by the pressing force of the external hydraulic cylinder 6. When a single plate of the electrode plate fails and needs to be replaced, the faulty electrode plate needs to be separated from the electrode plates on both sides, so as to achieve the replacement of the faulty electrode plate. The movable end plate pull rod arm 141 is installed on both sides of the movable end plate 2, the fixed end plate pull rod arm 142 is installed on both sides of the fixed end plate 1, one end of the inner pull rod 143 is fixedly connected to the fixed end plate pull rod arm 142, and the other end is slidably connected to the movable end plate pull rod arm 141 relatively. One end of the outer pull rod 144 is fixedly connected to the movable end plate pull rod arm 141, and the other end is slidably connected to the fixed end plate pull rod arm 142 relatively. The inner separating arm 145 is installed on the inner pull rod 143 and can slide axially relative to the inner pull rod 143, and the outer separating arm 146 is installed on the outer pull rod 144 and can slide axially relative to the outer pull rod 144. One-way locking lock heads 147 and springs are installed in both the inner separating arm 145 and the outer separating arm 146.

[0048] During the locking process of the electrolytic cell 4, the inner separation arm 145 and the outer separation arm 146 are not connected to the single plate of the electrode in the electrolytic cell 4, which does not affect the locking action; when a single plate of the electrode fails and needs to be replaced, the inner separation arm 145 and the outer separation arm 146 are respectively connected to the corresponding single plate of the electrode. The detachable connection can be realized through the tooling block and bolts. The right side of this application refers to the side of the fixed end plate 1, where the inner separation arm 145 is connected to the right electrode plate of the faulty electrode, and the outer separation arm 146 is connected to the left electrode plate of the faulty electrode. The internal lock head 147 of the separation arm falls into the lock groove on the pull rod under the action of the spring pressure. The inner separation arm 145 cannot move to the right, and the outer separation arm 146 cannot move to the left. When the movable end plate 2 moves to the left driven by the piston rod 7, the movable end plate pull rod arm 141 pulls the outer pull rod 144 to move to the left together, thereby driving the left electrode plate of the faulty electrode to move towards the cross beam 3 side. The right electrode plate of the faulty electrode is connected to the inner separation arm 145 and is not displaced by being pulled by the pull rod and the fixed end plate pull rod arm 142. Through the movement of the left electrode plate of the faulty electrode, the separation of the faulty electrode from other electrodes is realized, and further maintenance of the faulty electrode can be completed. The lock head 147 can be set as a lock pin, on which a spring is sleeved. The lock pin slides or locks the inner separation arm 145 and the outer separation arm 146 on the inner pull rod 143 and the outer pull rod 144 by the rotation of the lock pin rod.

[0049] Currently, when separating the electrode plates of the existing circular electrolytic cell 4, the whole stack needs to be removed, which is difficult and time-consuming to maintain, consuming labor and time costs, and is not conducive to technological progress; the locking device of the electrolytic cell 4 proposed by the present invention can separately separate the faulty electrode plate without removing other electrode plates, reducing the maintenance cost. Currently, the existing locking mechanism 9 of the square electrolytic cell 4 uses iron chains or steel wires to separate the faulty electrode plate during the separation of the electrode plates. The installation of the separation tooling is time-consuming and laborious, seriously affecting the maintenance efficiency of the electrolytic cell stack; the present invention realizes the control of the action process of the hydraulic locking device of the electrolytic cell stack through the electric control cabinet, and can realize the manual operation and automatic operation of the whole process of compressing and loosening the electrolytic cell stack.

[0050] The present invention also provides a control method for the locking device of the electrolytic cell 4, as Figure 7 shown, a strain gauge is provided at the end of the piston rod 7, which is used to monitor the pressing force of the electrolytic cell 4. A displacement sensor is correspondingly provided on the movable end plate 2, which is used to monitor the displacement of the movable end plate 2. The strain gauge and the displacement sensor are both connected to the electric control cabinet, and the electric control cabinet also monitors the hydraulic oil pressure; the electric control cabinet monitors the pressing force of the electrolytic cell 4 obtained by the strain gauge and compares it with the designed target value. If the designed value is reached, the hydraulic cylinder 6 is controlled to stop acting, otherwise it continues to act; the maximum displacement value of the movable end plate 2 and the maximum value of the hydraulic oil pressure are set in the electric control cabinet. When monitoring the pressing force of the electrolytic cell 4, the displacement of the movable end plate 2 and whether the hydraulic oil pressure reaches the designed maximum value are also monitored. If either reaches the maximum value, the hydraulic cylinder 6 is controlled to stop acting.

[0051] The electrical control cabinet collects signals such as the hydraulic pressure of the oil cylinder, the displacement of the movable end plate 2, the compression force of the electrolytic stack, and the displacement of the locking mechanism 9, and determines the compression and separation states of the electrolytic stack through the above signals; if all the signals reach the target set values, the compression / loosening state is good, otherwise the controller will continue to control the hydraulic cylinder to perform compression or loosening actions until all parameters reach the design target values. A strain gauge is provided at the end of the piston rod 7 to monitor whether the compression force reaches the designed locking force; a displacement sensor is correspondingly provided on the movable end plate 2 for detecting the displacement value of the movable end plate 2. When the strain force of the monitored strain gauge reaches the design value, the oil can be locked and drained; when the strain gauge is damaged and fails, that is, when it is monitored that the strain force is problematic and does not display or displays significantly incorrectly, the displacement sensor corresponding to the movable end plate 2 can be monitored to make it not exceed the designed displacement limit position, otherwise the excessive compression force will damage the electrolytic cell 4. The electrical control cabinet also collects the hydraulic pressure of the oil cylinder and sets a limit hydraulic pressure to avoid damaging the equipment and achieve further control and protection.

[0052] In another embodiment, sensors are provided at both the end of the thread 8 of the piston rod 7 and the plane of the cross beam 3, and the sensors are all connected to the electrical control cabinet for monitoring the displacement of the locking mechanism 9. A part of the thread 8 is provided on the piston rod 7, with a distance from one end to the end of the piston rod 7 and the other end extending to the cross beam 3. Sensors are provided at both the end of the thread 8 of the piston rod 7 and the contact plane between the locking mechanism 9 and the cross beam 3 (the actual interval is 1-2 mm, which does not affect the unloading caused by the small retraction distance of the piston rod 7 and also prevents excessive force on the contact surface due to direct contact and damage), for monitoring the limit position of the movement of the locking mechanism 9 to prevent the locking mechanism 9 from damaging the cross beam 3 or moving out of the piston rod 7.

[0053] It can be understood that the present invention is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, various changes or equivalent substitutions can be made to these features and embodiments. Although the embodiments of the present invention are disclosed as above, it is not limited to only the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. An electrolytic cell locking device, characterized in that, It includes a fixed end plate, a movable end plate and a cross beam arranged side by side in sequence. The electrolytic cell is arranged between the fixed end plate and the movable end plate. The fixed end plate and the cross beam are both fixedly arranged, and the two opposite side ends are fixedly connected into one body through a pair of large beams. Both side ends of the movable end plate are slidably connected with the guide rails arranged on the pair of large beams by setting sliders. A hydraulic cylinder is arranged on the cross beam, and its piston rod passes through the cross beam and is connected to the movable end plate. The electrolytic cell is locked by the pressing force provided by the hydraulic cylinder.

2. The electrolytic cell locking device according to claim 1, characterized in that, The piston rod is provided with threads, and a locking mechanism is fitted thereon. The locking mechanism includes a hollow shell and a lock nut, a worm gear and a worm arranged inside it. The lock nut is threadedly sleeved on the piston rod. The worm gear is fixedly sleeved outside the lock nut. The worm is engaged with the worm gear. The worm is driven to rotate by a hydraulic motor. One side of the lock nut facing the cross beam protrudes outside the hollow shell.

3. The electrolytic cell locking device according to claim 1, characterized in that, The hydraulic cylinder is provided with hydraulic oil by a hydraulic station, and the pressing force of the hydraulic cylinder on the electrolytic cell is controlled by an electric control cabinet.

4. The electrolytic cell locking device according to claim 1, wherein, Lifting lugs are arranged on both opposite sides of the electrolytic cell, and they are slidably sleeved on the large beams through guide rails.

5. The electrolytic cell locking device according to claim 1, characterized in that, Blocks are arranged at both opposite ends of the large beam, and they respectively abut against the cross beam and the fixed end plate.

6. The electrolytic cell locking device according to claim 1, characterized in that, The end of the piston rod is a protruding spherical surface, and a spherical concave hole that is concave inward and matches the spherical surface at the end of the piston rod is arranged at the center of the movable end plate. The end of the piston rod and the movable end are bolted through a flange plate.

7. The electrolytic cell locking device according to claim 1, characterized in that, A separation mechanism is also provided, which includes separation units arranged oppositely on the outer sides of a pair of large beams. The separation unit includes a movable end plate pull rod arm and a fixed end plate pull rod arm respectively fixedly connected to the side ends of the movable end plate and the fixed end plate, an inner pull rod and an outer pull rod connecting the movable end plate pull rod arm and the fixed end plate pull rod arm, an inner separation arm and an outer separation arm respectively arranged on the inner pull rod and the outer pull rod; one end of the inner pull rod is fixedly connected to the fixed end plate pull rod arm, and the other end is slidably connected to the movable end plate pull rod arm; one end of the outer pull rod is fixedly connected to the movable end plate pull rod arm, and the other end is slidably connected to the fixed end plate pull rod arm; the inner separation arm is slidably arranged on the inner pull rod, and the outer separation arm is slidably arranged on the outer pull rod.

8. The electrolytic cell locking device according to claim 7, characterized in that, Locking heads and springs that are unidirectionally locked are arranged in both the inner separation arm and the outer separation arm to enable the inner separation arm and the outer separation arm to slide or lock on the inner pull rod and the outer pull rod.

9. A control method for an electrolytic cell locking device, characterized in that, A strain gauge is arranged at the end of the piston rod, which is used to monitor the pressing force of the electrolytic cell. A displacement sensor is correspondingly arranged on the movable end plate, which is used to monitor the displacement of the movable end plate. The strain gauge and the displacement sensor are both connected to the electric control cabinet, and the electric control cabinet also monitors the hydraulic oil pressure; the electric control cabinet monitors the pressing force of the electrolytic cell obtained by the strain gauge and compares it with the designed target value. If the designed value is reached, it controls the hydraulic cylinder to stop acting, otherwise it continues to act; the maximum displacement value of the movable end plate and the maximum value of the hydraulic oil pressure are set in the electric control cabinet. When monitoring the pressing force of the electrolytic cell, the displacement of the movable end plate and whether the hydraulic oil pressure reaches the designed maximum value are also monitored simultaneously. If either reaches the maximum value, the hydraulic cylinder is controlled to stop acting.

10. The control method of the electrolytic cell locking device according to claim 9, characterized in that, The piston rod is provided with sensors at both the end of its thread and the crossbeam plane, and the sensors are all connected to the electric control cabinet for monitoring the displacement of the locking mechanism.

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