Ionic membrane electrolytic cell cathode and anode disc and large plate welding method

Abstract

The invention relates to a method for welding cathode and anode discs and a large plate of an ionic membrane electrolytic cell, which belongs to the technical field of welding and comprises the following steps: step 1, fixing two transverse rods and two longitudinal rods by adopting a welding positioning device; 1.1, two transverse rods are symmetrically placed on a workbench in the front-back direction through a workpiece conveying system, and the two transverse rods are made to move close to each other through a first pressing assembly till the transverse rods abut against the front side and the rear side of the positioning base correspondingly; 1.2, the two longitudinal rods are symmetrically placed on the workbench in the left-right direction through the first workpiece conveying system, and the two longitudinal rods move close to each other through a first pressing assembly, automatic welding of the cathode disc, the anode disc and the large plate is achieved, the production efficiency and appearance uniformity are improved, and through positioning of the transverse rods, the longitudinal rods and the large plate, the production efficiency is improved. The welding quality is improved, impurities are blown away through air exhausted through the first air holes and the second air holes, the impurities are prevented from influencing the welding effect and deformation, and the welding quality is further improved.

Description

TECHNICAL FIELD

[0001] The application relates to a welding method for anion membrane electrolyzer cathode and anode plates and large plates, and belongs to the technical field of welding. BACKGROUND

[0002] The anode and cathode plates and the large plates thereof are important structural components in the anion membrane electrolyzer. The anode and cathode plates are core components for realizing electrochemical reactions of the anion membrane electrolyzer, and their functions include electric conduction, catalytic reaction, support of the anion membrane, guidance of fluid flow and the like. The gas-liquid separation box of the anion membrane electrolyzer ensures the stability, safety and economy of the electrolysis process through efficient gas-liquid separation, liquid level control and pressure management, and is a key link for realizing product separation, resource recycling and safe production in the chlor-alkali production. The design and performance of the gas-liquid separation box directly affect the operation efficiency of the electrolyzer, the product quality and the long-period stable operation of the device. How to ensure the welding quality during the production of the anode and cathode plates and the large plates thereof is a very key process.

[0003] The utility model discloses a cathode plate large plate welding positioning device discloses a cathode plate large plate welding positioning device, relates to electrolytic cell processing technical field, including positioning frock, positioning frock includes two groups of deflection variable positioner, and is connected with the welding workstation between two groups of deflection variable positioner, is equipped with the second lateral limit device and the second longitudinal limit device on the welding workstation. The utility model discloses first place the electrolytic cell cathode plate on the welding workstation, then control the position adjusting support to walk along the slide axle, and the lifting of the lateral positioning baffle is controlled in combination with the lifting hydraulic cylinder, so that the lateral positioning baffle is in contact with one side of the electrolytic cell cathode plate and is limited, then control multiple lateral limit hydraulic cylinders to work, so that the lateral pressing plate at the end of the telescopic rod is in contact with the side of the electrolytic cell cathode plate and is fixed, and the side edge positioning of the electrolytic cell cathode plate is quickly completed. However, in the prior art, only the bending type anode and cathode plate large plates can be welded, and when the size of the anode and cathode plate large plates is relatively thick, only the manual welding mode can be used to produce the anode and cathode plates first, and then the large plates are welded on the anode and cathode plates. The welding quality and appearance uniformity are difficult to guarantee by the traditional manual welding, and the production efficiency cannot be guaranteed.

[0004] Therefore, a welding method for anion membrane electrolyzer cathode and anode plates and large plates is needed to improve the welding quality, production efficiency and appearance uniformity. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the deficiencies of the prior art and provide a welding method for anion membrane electrolyzer cathode and anode plates and large plates, which improves the welding quality, production efficiency and appearance uniformity.

[0006] The technical scheme adopted by the present application to solve the above problems is as follows: a welding method for anion membrane electrolyzer cathode and anode plates and large plates, comprising the following steps: Step 1, two horizontal rods and two vertical rods are fixed by welding positioning device; Step 1.1, two horizontal rods are symmetrically placed on the workbench by the workpiece transmission system in the front-back direction, and the two horizontal rods are moved close to each other by the first pressing assembly until the horizontal rods abut against the front and rear sides of the positioning seat respectively; Step 1.2, two vertical rods are symmetrically placed on the workbench by the first workpiece transmission system in the left-right direction, and the two vertical rods are moved close to each other by the first pressing assembly until the vertical rods abut against the left and right sides of the positioning seat respectively, and at this time, the two horizontal rods are located between the two vertical rods, and the two horizontal rods and the two vertical rods form a disc body with a meandering frame structure, the two ends of the horizontal rod abut against the two vertical rods, and the abutment position of the vertical rod and the horizontal rod is the disc body welding position; Step 2, disc body welding; The disc body is welded by the welding system, and the specific welding position is the top, inside and outside of the meandering frame structure; During the execution of steps 1 and 2, the first air hole on the positioning seat exhausts air and acts on the disc body welding position; Step 3, large plate fixation; After placing the large plate on one end of the top of the disc body by the second workpiece transmission system, the large plate is pressed in the downward direction by the second pressing assembly, that is, the positioning between the large plate and the disc body in the upward and downward directions is realized; Step 4, large plate welding; The large plate is welded on the disc body by the welding system; During the execution of steps 3 and 4, the second air hole on the positioning seat exhausts air upward and acts on the large plate; Step 5, the large plate and the disc body are placed on the workbench after being turned over; Step 6, disc body secondary welding; The top of the disc body at this time is welded by the welding system, and the specific welding position is the top of the meandering frame structure at this time; Step 7, the side plate is welded on the top of the disc body at this time.

[0007] As preferred, the step 5 specifically includes the following steps: Step 5.1, the first pressing assembly and the second pressing assembly stop pressing action; Step 5.2, the positioning seat moves down to the lower side of the workbench; Step 5.3, the large plate and the disc body welded together on the workbench are grabbed and turned over up and down by the cooperation of the plurality of first workpiece transmission systems; Step 5.4, the large plate and the disc body after being turned over are placed on the workbench by the plurality of first workpiece transmission systems, and at this time, the large plate is at the bottom of the disc body.

[0008] Preferably, step 7 specifically includes the following steps: Step 7.1: Place the side plate horizontally on top of the disc body using the second workpiece transfer system; Step 7.2: Weld the side plates to the disc body using a welding system.

[0009] Preferably, the welding positioning device includes a workbench with a through hole. A positioning seat is vertically inserted through the through hole. A lifting system is connected to the positioning seat to raise and lower it. Four first clamping components are provided on the top of the workbench, located at the front, back, left, and right sides of the positioning seat. The positioning seat is hollow and has an air inlet pipe connected to an air supply system. A first air hole is provided on the side wall of the positioning seat, and a second air hole is provided on the top of the positioning seat. The first air hole, the second air hole, and the air inlet pipe are all connected to the inner cavity of the positioning seat. A second clamping component is provided on the positioning seat.

[0010] Preferably, the lifting system includes a lifting plate, which is driven to rise and fall by a first cylinder. The lifting plate is located below the positioning seat and is fixedly connected to the positioning seat.

[0011] Preferably, the first clamping assembly includes a clamping bar, and a second cylinder is connected to the side of the clamping bar away from the positioning seat. The second cylinder drives the clamping bar to move toward or away from the positioning seat.

[0012] Preferably, the positioning seat is a cuboid, and each of the four corners of the positioning seat is chamfered, with the four first air holes located at the four chamfers respectively.

[0013] Preferably, the second clamping assembly includes a horizontally arranged rotating shaft with a rotating support connected to it. The rotating support is mounted on a positioning seat. The rotating shaft is connected to a drive system, which enables the rotating shaft to rotate. Here, the drive system can be a motor. A connecting rod is provided on one side of the rotating shaft along the diameter direction. The connecting rod is parallel to the rotating shaft and is fixedly connected to it. A clamping plate is rotatably connected to the connecting rod via a connector. The clamping plate is arranged horizontally.

[0014] Preferably, the connector includes a sleeve that is rotatably fitted onto the connecting rod, the sleeve being positioned above the pressure plate, and the sleeve being fixedly connected to the pressure plate.

[0015] Preferably, both ends of the sleeve abut against limit rings, and the limit rings are fixedly sleeved on the connecting rod.

[0016] Compared with the prior art, the advantages of the present invention are as follows: This invention discloses a welding method for anode and cathode plates and large plates in an ion-exchange membrane electrolyzer. This method enables automatic welding of the anode and cathode plates and large plates, improving production efficiency and appearance uniformity. Furthermore, by positioning the crossbars, longitudinal bars, and large plates, the welding quality is improved. The air discharged through the first and second vents blows away impurities, preventing them from affecting the welding effect and causing deformation, thus further enhancing the welding quality. Attached Figure Description

[0017] Figure 1 A three-dimensional view of the welding positioning device; Figure 2 This is the front view of the welding positioning device; Figure 3 This is a top view of the welding positioning device; Figure 4 Left view of the welding positioning device; Figure 5 This is a schematic diagram of the second clamping assembly; Figure 6 A three-dimensional view of the positioning seat; Figure 7 This is a sectional view of the positioning seat; Figure 8 This is a schematic diagram of the disk's structure; Figure 9 This is a schematic diagram of the connection structure between the disk body and the large plate.

[0018] in: Workbench 1, positioning seat 2, lifting system 3, first pressing assembly 4, air inlet pipe 5, first air hole 6, second air hole 7, second pressing assembly 8; Lifting plate 31, first cylinder 32; Clamping bar 41, second cylinder 42; Rotating shaft 81, rotating support 82, connecting rod 83, clamping plate 84, sleeve 85, limiting ring 86 The plate is 100, and the large plate is 200. Horizontal bar 101, vertical bar 102. Detailed Implementation

[0019] like Figures 1-9 As shown in this embodiment, a welding method for the anode and cathode plates and the large plate of an ion-exchange membrane electrolyzer includes the following steps: Step 1: Fix the two horizontal bars 101 and the two vertical bars 102 using a welding positioning device; Step 1.1: Place the two crossbars 101 symmetrically on the worktable 1 in the front-back direction using the workpiece transfer system, and move the two crossbars 101 closer together using the first clamping assembly 4 until the crossbars 101 abut against the front and back sides of the positioning seat 2 respectively. Step 1.2: The two vertical rods 102 are symmetrically placed on the worktable 1 in the left-right direction through the first workpiece transfer system, and the two vertical rods 102 are moved closer together by the first clamping assembly 4 until the vertical rods 102 abut against the left and right sides of the positioning seat 2 respectively. At this time, the two horizontal rods 101 are located between the two vertical rods 102. The two horizontal rods 101 and the two vertical rods 102 together form a U-shaped frame structure of the disc body 100. The two ends of the horizontal rods 101 abut against the two vertical rods 102 respectively. The abutment position of the vertical rods 102 and the horizontal rods 101 is the welding position of the disc body 100. The first workpiece transfer system can be a gripper-type robotic arm; Step 2: Solder the disk body in one pass (100%). The disk body 100 is welded using a welding system, specifically at the top, inner, and outer sides of the loop frame structure. The welding system can be a welding robot; During the execution of steps 1 and 2, the first air hole 6 on the positioning seat 2 discharges air and acts on the welding position of the disc 100. Under the action of the airflow, on the one hand, it blows away the impurities at the position where the crossbar 101 and the vertical bar 102 abut against each other, so as to avoid the impurities affecting the welding effect. On the other hand, it realizes heat dissipation during welding, so as to avoid the disc 100 from deforming due to overheating during the welding process. Step 3: Fix the large board 200; After the large plate 200 is placed at one end of the top of the disc body 100 by the second workpiece transfer system, the large plate 200 is squeezed downward by the second pressing component 8, thus achieving the vertical positioning between the large plate 200 and the disc body 100. The second workpiece transfer system can be a suction cup robotic arm; Step 4: Weld the large plate to 200mm; The large plate 200 is welded onto the disk 100 using a welding system; During steps 3 and 4, the second air hole 7 on the positioning seat 2 discharges air upward and acts on the large plate 200. Under the action of the airflow, on the one hand, the impurities on the large plate 200 are blown away to avoid the impurities affecting the welding effect. On the other hand, heat dissipation is achieved during welding to prevent the large plate 200 from deforming due to overheating when it is welded to the disc 100. Step 5: After flipping the large plate 200 and the disk body 100, place them on the workbench 1; Step 5.1: The first clamping component 4 and the second clamping component 8 stop clamping. Step 5.2: Positioning seat 2 moves down to below worktable 1; Step 5.3: Through the cooperation of multiple first workpiece transfer systems, the large plate 200 and the disk 100 that have been welded together on the worktable 1 are picked up and flipped up and down; Step 5.4: Using multiple first workpiece transfer systems, place the flipped large plate 200 and disk 100 on the worktable 1, at which time the large plate 200 is at the bottom of the disk 100. Step 6: Secondary welding of the disk body; The top of the disk body 100 is welded using a welding system, specifically at the top of the loop frame structure. Step 7: Weld the side plate to the top of the plate body 100 at this time; Step 7.1: Place the side plate horizontally on top of the disk body 100 using the second workpiece transfer system. Here, the size of the side plate matches the size of the disk body 100. Step 7.2: Weld the side plates onto the disc body 100 using a welding system; It should be noted that the loop-shaped frame structure and the side plate form the yin and yang polarity plates; The welding positioning device includes a workbench 1 with a through hole. A positioning seat 2 is vertically inserted through the through hole. A lifting system 3 is connected to the positioning seat 2, which enables the positioning seat 2 to be raised and lowered. Four first pressing components 4 are provided on the top of the workbench 1, which are located on the front, back, left, and right sides of the positioning seat 2. The positioning seat 2 is hollow and has an air inlet pipe 5 connected to an air supply system, which can be an air pump. A first air hole 6 is provided on the side wall of the positioning seat 2, and a second air hole 7 is provided on the top of the positioning seat 2. The first air hole 6, the second air hole 7, and the air inlet pipe 5 are all connected to the inner cavity of the positioning seat 2. A second pressing component 8 is provided on the positioning seat 2. The lifting system 3 includes a lifting plate 31, which is driven to lift by a first cylinder 32. The lifting plate 31 is located below the positioning seat 2 and is fixedly connected to the positioning seat 2. When the first cylinder 32 drives the lifting plate 31 to lift, the lifting plate 31 drives the positioning seat 2 to lift. The first clamping assembly 4 includes a clamping strip 41. A second cylinder 42 is connected to the side of the clamping strip 41 away from the positioning seat 2. The second cylinder 42 drives the clamping strip 41 to move closer to or away from the positioning seat 2. When positioning the crossbar 101, the crossbar 101 is first placed between the clamping strip 41 and the positioning seat 2. Then, the clamping strip 41 is driven to move closer to the positioning seat 2 by the second cylinder 42. The movement of the clamping strip 41 pushes the crossbar 101 to move synchronously until the clamping strip 41 and the positioning seat 2 achieve a clamping position on the crossbar 101. The positioning method of the vertical bar 102 is the same as that of the crossbar 101. The positioning seat 2 is a cuboid, and chamfers are provided at all four corners of the positioning seat 2. The four first air holes 6 are located at the four chamfers respectively. Here, the chamfers are used to prevent obstruction of the welding position of the loop frame structure. The second clamping assembly 8 includes a horizontally arranged rotating shaft 81, a rotating support seat 82 connected to the rotating shaft 81, the rotating support seat 82 being disposed on the positioning seat 2, the rotating shaft 81 being connected to a drive system, the drive system enabling the rotating shaft 81 to rotate, here, the drive system can be a motor, a connecting rod 83 is provided on one side of the rotating shaft 81 along the diameter direction, the connecting rod 83 is parallel to the rotating shaft 81, the connecting rod 83 is fixedly connected to the rotating shaft 81, a clamping plate 84 is rotatably connected to the connecting rod 83 through a connector, the clamping plate 84 is arranged horizontally; Multiple connectors are provided, and the multiple connectors are arranged along the axis of the connecting rod 83. Each connector includes a sleeve 85, which is rotatably sleeved on the connecting rod 83. The sleeve 85 is located above the pressure plate 84, and the sleeve 85 is fixedly connected to the pressure plate 84. Both ends of the sleeve 85 abut against the limiting ring 86, which is fixedly sleeved on the connecting rod 83. The function of the limiting ring 86 is to prevent the sleeve 85 from shifting along the axis of the connecting rod 83. When positioning the horizontal bar 101 and the vertical bar 102, the first air hole 6 is above the worktable 1. The drive system drives the rotating shaft 81 to rotate. The rotation of the rotating shaft 81 causes the connecting rod 83 to rotate downward. The clamping plate 84 rotates relative to the sleeve 85 and the connecting rod 83 due to its own gravity. The clamping plate 84 always remains horizontal. When the clamping plate 84 is in contact with the top of the positioning plate, the rotating shaft 81 stops rotating. At this time, the clamping plate 84 seals the second air hole 7. After the air supply system delivers air from the air inlet pipe 5 to the positioning seat 2, the air in the positioning seat 2 can only be discharged from the first air hole 6. When the rotating shaft 81 rotates in the opposite direction, the clamping plate 84 separates from the positioning seat 2, that is, the clamping plate 84 stops sealing the second air hole 7. Before positioning and welding the large plate 200, the first cylinder 32 drives the lifting plate 31 to descend. The descent of the lifting plate 31 causes the positioning seat 2 to descend synchronously, and the first air hole 6 is placed in the through hole. The first air hole 6 is sealed through the inner wall of the through hole. At this time, the pressing plate 84 stops sealing the second air hole 7, and the air in the positioning seat 2 can only be discharged from the second air hole 7. In summary, the automatic welding of the anode and cathode plates and the large plate 200 has been achieved, improving production efficiency and appearance uniformity. Furthermore, the positioning of the crossbar 101, the longitudinal bar 102, and the large plate 200 has improved the welding quality. The air discharged through the first vent 6 and the second vent 7 blows away impurities, preventing them from affecting the welding effect and causing deformation, thus further improving the welding quality.

[0020] In addition to the above embodiments, the present invention also includes other embodiments. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.

Claims

1. A method for welding anode and cathode plates and a large plate (200) of an ion-exchange membrane electrolyzer, characterized in that: Includes the following steps: Step 1: Fix the two horizontal bars (101) and two vertical bars (102) using a welding positioning device. Step 1.1: Place the two crossbars (101) symmetrically on the worktable (1) in the front-back direction through the workpiece transfer system, and move the two crossbars (101) closer together through the first clamping assembly (4) until the crossbars (101) abut against the front and back sides of the positioning seat (2) respectively. Step 1.2: The two vertical rods (102) are symmetrically placed on the worktable (1) in the left and right directions through the first workpiece transfer system, and the two vertical rods (102) are moved closer together by the first clamping assembly (4) until the vertical rods (102) abut against the left and right sides of the positioning seat (2) respectively. At this time, the two horizontal rods (101) are located between the two vertical rods (102). The two horizontal rods (101) and the two vertical rods (102) together form a disc (100) with a loop frame structure. The two ends of the horizontal rods (101) abut against the two vertical rods (102) respectively. The abutment position of the vertical rods (102) and the horizontal rods (101) is the welding position of the disc (100). Step 2: Solder the disc body (100) in one go; The disk body (100) is welded using a welding system, specifically at the top, inner and outer sides of the loop frame structure; During the execution of steps 1 and 2, the first vent (6) on the positioning seat (2) discharges air and acts on the welding position of the disc body (100); Step 3: Fix the large plate (200); After the large plate (200) is placed at one end of the top of the disk body (100) by the second workpiece transfer system, the large plate (200) is squeezed downward by the second clamping component (8), thus realizing the vertical positioning between the large plate (200) and the disk body (100). Step 4: Welding of the large plate (200); The large plate (200) is welded to the disc (100) using a welding system; During steps 3 and 4, the second air hole (7) on the positioning seat (2) discharges air upwards and acts on the large plate (200); Step 5: After flipping the large plate (200) and the tray (100), place them on the workbench (1); Step 6: Secondary welding of the disc body (100); The top of the disk body (100) is welded using a welding system, specifically at the top of the loop frame structure. Step 7: Weld the side plate to the top of the plate (100) at this time.

2. The welding method for the anode and cathode plates and the large plate (200) of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: Step 5 specifically includes the following steps: Step 5.1: The first clamping assembly (4) and the second clamping assembly (8) stop clamping. Step 5.2: The positioning seat (2) is moved down to below the worktable (1); Step 5.3: Through the cooperation of multiple first workpiece transfer systems, the large plate (200) and the disk (100) that have been welded together on the worktable (1) are picked up and flipped up and down; Step 5.4: The flipped large plate (200) and the disk (100) are placed on the worktable (1) through multiple first workpiece transfer systems, and at this time, the large plate (200) is at the bottom of the disk (100).

3. The welding method for the anode and cathode plates and the large plate (200) of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: Step 7 specifically includes the following steps: Step 7.1: Place the side plate horizontally on top of the disk body (100) at this time using the second workpiece transfer system; Step 7.2: Weld the side plate to the disc (100) using a welding system.

4. The welding method for the anode and cathode plates and the large plate (200) of an ion-exchange membrane electrolyzer according to claim 1, characterized in that: The welding positioning device includes a workbench (1), a through hole is provided on the workbench (1), a positioning seat (2) is vertically inserted in the through hole, a lifting system (3) is connected to the positioning seat (2), the lifting system (3) is used to lift the positioning seat (2), four first pressing components (4) are provided on the top of the workbench (1), the four first pressing components (4) are respectively located on the front, back, left and right sides of the positioning seat (2), the positioning seat (2) is hollow, an air inlet pipe (5) is provided on the positioning seat (2), the air inlet pipe (5) is connected to the air supply system, a first air hole (6) is provided on the side wall of the positioning seat (2), a second air hole (7) is provided on the top of the positioning seat (2), the first air hole (6), the second air hole (7) and the air inlet pipe (5) are all connected to the cavity inside the positioning seat (2), and a second pressing component (8) is provided on the positioning seat (2).

5. The welding method for the anode and cathode plates and the large plate (200) of an ion-exchange membrane electrolyzer according to claim 4, characterized in that: The lifting system (3) includes a lifting plate (31), which is driven to lift by a first cylinder (32). The lifting plate (31) is located below the positioning seat (2) and is fixedly connected to the positioning seat (2).

6. The welding method for the anode and cathode plates and the large plate (200) of an ion-exchange membrane electrolyzer according to claim 4, characterized in that: The first pressing assembly (4) includes a pressing strip (41), and a second cylinder (42) is connected to the side of the pressing strip (41) away from the positioning seat (2). The second cylinder (42) drives the pressing strip (41) to move closer to or away from the positioning seat (2).

7. The welding method for the anode and cathode plates and the large plate (200) of an ion-exchange membrane electrolyzer according to claim 4, characterized in that: The positioning seat (2) is a cuboid, and chamfers are provided at all four corners of the positioning seat (2). The four first air holes (6) are located at the four chamfers respectively.

8. The welding method for the anode and cathode plates and the large plate (200) of an ion-exchange membrane electrolyzer according to claim 4, characterized in that: The second pressing assembly (8) includes a horizontally arranged rotating shaft (81), on which a rotating support seat (82) is connected. The rotating support seat (82) is set on the positioning seat (2). The rotating shaft (81) is connected to a drive system, which enables the rotating shaft (81) to rotate. Here, the drive system can be a motor. A connecting rod (83) is provided on one side of the rotating shaft (81) along the diameter direction. The connecting rod (83) is parallel to the rotating shaft (81) and is fixedly connected to the rotating shaft (81). A pressing plate (84) is rotatably connected to the connecting rod (83) through a connector. The pressing plate (84) is arranged horizontally.

9. The welding method for the anode and cathode plates and the large plate (200) of an ion-exchange membrane electrolyzer according to claim 8, characterized in that: The connector includes a sleeve (85), which is rotatably sleeved on the connecting rod (83). The sleeve (85) is located above the pressure plate (84), and the sleeve (85) is fixedly connected to the pressure plate (84).

10. The welding method for the anode and cathode plates and the large plate (200) of an ion-exchange membrane electrolyzer according to claim 9, characterized in that: Both ends of the sleeve (85) abut against the limiting ring (86), and the limiting ring (86) is fixedly sleeved on the connecting rod (83).

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