CN117123944A

CN117123944A - Welding system and method for hydrogen energy alkaline electrolytic tank

Info

Publication number: CN117123944A
Application number: CN202310964975.5A
Authority: CN
Inventors: 杨田; 邹逢; 杨威; 程英; 赵健
Original assignee: Wuhan Huagong Laser Engineering Co Ltd
Current assignee: Wuhan Huagong Laser Engineering Co Ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2023-11-28

Abstract

The invention discloses a welding system and a method for a hydrogen energy alkaline electrolytic tank, which are used for welding a pole frame and a pole plate of the hydrogen energy alkaline electrolytic tank, wherein the system comprises a moving mechanism and a rotating platform, wherein a welding head, a wire feeding component and a welding seam tracking component are arranged on the moving mechanism, the welding head is used for laser welding of the pole frame and the pole plate, the wire feeding component is used for synchronously feeding wires during laser welding, and the welding seam tracking component is used for tracking welding seams during laser welding; the rotary platform is provided with a tool fixture, the tool fixture is used for fixing the pole frame and the pole plate, and the rotary platform drives the pole frame and the pole plate to rotate for welding during welding. The invention improves the welding processing efficiency and quality of the electrolytic tank and reduces the heat input deformation.

Description

Welding system and method for hydrogen energy alkaline electrolytic tank

Technical Field

The invention relates to the technical field of laser welding in the hydrogen energy industry, in particular to welding equipment and method for a hydrogen energy electrolytic tank.

Background

With the development of the hydrogen energy industry chain, the hydrogen production link is paid attention to, wherein the growing trend of the alkaline electrolytic tank is rapid. The existing electrolytic tank welding equipment mainly adopts traditional gas shielded welding, and has low welding efficiency, small welding depth-to-width ratio and large heat input, so that the heat input amount in the welding process is large, and the welding deformation amount is large, so that the subsequent electrolytic tank stacking process cannot be assembled.

In the process of material replacement, as the product size is larger, the welding position can be changed due to tiny size deviation or deformation, and the welding position is mainly changed by increasing the width of a welding line to be compatible at present, so that the efficiency is low or the heat input amount is increased, the deformation amount is increased, and the condition that the welding line is difficult to cover is easy to occur, so that the welding leakage or the welding defect occurs.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides welding equipment and a method for a hydrogen energy electrolytic cell, which are used for improving the welding processing efficiency and quality of the electrolytic cell and reducing the heat input deformation.

According to an aspect of the present specification, there is provided a welding system for a hydrogen alkaline electrolytic cell for welding a pole frame and a pole plate of the hydrogen alkaline electrolytic cell, comprising a moving mechanism and a rotating platform, wherein,

the welding head is used for laser welding of the polar frame and the polar plate, the wire feeding component is used for synchronously feeding wires during laser welding, and the welding seam tracking component is used for tracking welding seams during laser welding;

the rotary platform is provided with a tool fixture, the tool fixture is used for fixing the pole frame and the pole plate, and the rotary platform drives the pole frame and the pole plate to rotate for welding during welding.

According to the technical scheme, the special tooling jig is adopted, the rapid clamping of the polar frame and the polar plate is realized, the moving mechanism is matched with the welding head, the welding seam tracking and wire feeding assembly, the welding mode of laser wire feeding is realized, and the polar frame and the polar plate on the tooling jig are driven to rotate through the rotating platform during welding, so that the welding efficiency is higher and the thermal deformation is smaller under the condition of ensuring the welding quality and sealing.

Further, the weld tracking assembly is internally provided with a weld tracking program in advance, and can identify the XYZ coordinates of the weld and conduct guiding welding.

As a further technical scheme, the tool fixture is of an annular structure, a slip ring is arranged at the center of the tool fixture, a positioning pin is arranged on an outer ring of the tool fixture, a plurality of electromagnets are arranged on the inner ring of the tool fixture, the slip ring is of a hollow structure and is communicated with a rotary platform, the positioning pin is used for positioning a pole frame, and the electromagnets are used for fixing pole plates.

Optionally, the positioning pin is provided with one or more. When a plurality of locating pins are arranged, the locating pins are uniformly distributed on the outer ring at intervals.

Further, a plurality of electromagnets are arranged at the edge of the inner ring for one circle, and the edge of the polar plate is attracted by generating magnetic force through electrifying.

As a further technical scheme, be equipped with annular water route on the frock tool, annular water route passes through the pipeline and connects to sliding ring department. And the annular waterway is used for radiating welding heat, so that the effect of reducing the deformation of the polar plate is achieved.

Further, the annular waterway is connected with a water chiller. The water chiller is used for providing cold water for the annular waterway and also used for providing refrigeration for a laser, a welding head and the like.

As a further technical scheme, be equipped with the air flue on the frock tool, the air flue passes through the pipeline and connects to sliding ring department.

Optionally, the air channel comprises a plurality of air grooves and air holes, and each air groove corresponds to one air hole. And the gas is introduced into the gas tank and is discharged from the gas holes, so that the effect of protecting the appearance of the welding seam is achieved.

As a further technical scheme, the tool fixture is provided with a pressing block for pressing the pole frame.

Optionally, the press block is a pneumatic press block. The pneumatic pressing block is driven by a pressing cylinder.

Further, the cylinder rotates 180 degrees to press down for compaction, and is positioned at 0 degree and at the highest position when the cylinder does not work.

Optionally, the pressing block can adopt an electric pressing device or a manual pressing device to realize the function of pressing the pole frame.

Further, the waterway pipeline, the air channel pipeline and the electromagnet circuit can be connected to the slip ring, so that each pipeline and the wire harness follow rotation when the rotating platform rotates.

As a further technical scheme, send the silk subassembly to include sending a silk hanging disc, send a silk hanging disc to connect and send a silk conveyer, send a silk conveyer to connect and send the silk pipe, send the front end of silk pipe to be equipped with and send the silk mouth.

Further, the wire feeding conveying piece comprises a wire feeding driving wheel and a wire feeding driven wheel.

Further, the wire feeding hanging plate is connected with a motor.

Further, the wire feeding assembly is also connected with a wire feeding controller.

As a further technical scheme, the wire feeding nozzle, the wire feeding pipe and the wire feeding conveying piece are replaceable components and are replaced according to the diameter and/or the material of the wire.

Further, the wire feeding nozzle needs to be matched and selected according to the diameter of the wire.

Further, the wire feeding tube needs to select different types of materials according to wires of different materials.

Further, the wire grooves on the wire feeding driving wheel and the wire feeding driven wheel are required to be matched according to the diameter of the wire.

Further, the compression bar on the wire feeding driving wheel and the wire feeding driven wheel needs to be adjusted according to wires of different materials.

As a further technical solution, the moving mechanism includes a multi-axis robot, a multi-axis module, or a multi-axis mechanical arm. The multi-shaft moving mechanism can drive the welding head to realize multi-station welding of products with different sizes and different angles.

As a further technical scheme, the welding head is a swinging welding head.

Alternatively, the oscillation frequency and the oscillation amplitude of the oscillating welding head may be set according to the welding requirements.

Optionally, the welding head is a laser welding head with coaxial blowing and visual monitoring functions, and the state of the welding seam can be observed through a display screen.

Further, the coaxial blowing device adopts calandria blowing to protect welding seams from oxidation during and after welding.

Further, the welding head is connected with a laser collimator, the laser collimator is connected with a laser through an optical fiber, and the laser is used as a light emitting source.

According to an aspect of the present specification, there is provided a welding method for a hydrogen energy alkaline electrolytic cell for welding a pole frame and a pole plate of the hydrogen energy alkaline electrolytic cell, the method comprising:

placing the pole frame on an outer ring of the tool fixture and compacting;

placing the polar plate in an inner ring of a tooling fixture and compacting;

the wire feeding assembly is adjusted to enable the angle of the wire feeding tube, the heights of wires and products, the positions of the wires and laser focuses and the wire feeding speed to meet preset conditions;

cooling water and protective gas are led into the tool fixture;

driving the welding head to move to a welding position, and performing spot welding by combining the preset spot welding positions of the wire feeding assembly and the welding seam tracking assembly;

and controlling the welding head to move, and performing full welding by combining a welding seam tracking program in the wire feeding assembly and the welding seam tracking assembly.

Alternatively, the placement of the polar frame and/or polar plate can be realized by using a lifting or mechanical arm.

Optionally, before cooling water and shielding gas are introduced into the fixture, the fixture further comprises adjusting the blowing angle of the calandria, wherein the blowing angle is required to be larger than 20 degrees.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, a robot is matched with a laser welding head, a welding line tracking and wire feeding assembly, and the tool fixture adopts pneumatic pressing, electromagnetic adsorption, water cooling and lower protection gas, so that the rapid feeding clamping, pre-welding and full-welding of the electrode plates and the electrode frames of the electrolytic cell are realized, and the high-efficiency and high-quality welding requirements of the electrolytic cell are realized.

2. The invention adopts the method of laser wire feeding welding, and has higher welding efficiency and smaller thermal deformation under the condition of ensuring welding quality and sealing.

3. The welding head of the welding process method adopts the swinging head, so that different paths and widths can be set, and the width and quality of the welding seam are ensured.

4. The welding process adopts a weld joint tracking system, avoids the position setting and realizes automatic welding.

5. The welding adopts a water cooling jig and lower protection blowing, ensures the quality of welding seams and reduces the thermal deformation.

Drawings

FIG. 1 is a schematic view of a welding system for a hydrogen energy alkaline electrolyzer of the invention.

FIG. 2 is a cross-sectional view of a weld for an A-type product implementation in a hydrogen energy alkaline electrolyzer welding process in accordance with the present invention.

FIG. 3 is a cross-sectional view of a weld for another implementation of type A product in a hydrogen energy alkaline cell welding process according to the present invention.

FIG. 4 is a cross-sectional view of a weld for a type B product implementation in a hydrogen energy alkaline cell welding process of the present invention.

FIG. 5 is a cross-sectional view of a weld for another implementation of a type B product in a hydrogen energy alkaline cell welding process of the present invention.

FIG. 6 is a schematic view of 3 swing patterns used for a welding head in a welding method for a hydrogen energy alkaline electrolytic cell according to the present invention.

In the figure: 1. a robot; 2. a welding head; 3. a weld tracking assembly; 4. a wire feeding assembly; 5. rotating the platform; 6. tool fixture; 7. a laser; 8. a water chiller; 9. an air blowing device; 10. briquetting; 11. a positioning pin; 12. an electromagnet; 13. an annular waterway; 14. an airway; 15. a slip ring; 16. a collimator lens; 17. a monitoring camera; 18 coaxial air tap; 19. a wire feeding nozzle; 20. a wire feeding tube; 21. a compression bar; 22. a driving wheel; 23. driven wheel; 24. a wire feeding hanging plate; 25. an A-type polar plate; 26. an A-type pole frame; 27. an A-type weld cross section; 28. another type a weld cross section; 29. a B-type polar plate; 30. a B-type pole frame; 31; a B-type weld cross section; 32; another type B weld cross section.

Detailed Description

The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Example 1

As shown in fig. 1, a welding system for a hydrogen-enabled alkaline electrolyzer: comprises a robot, a welding head, a welding seam tracking system, a wire feeding assembly, a laser, a rotary platform, a tooling fixture and a water chiller.

The robot is suspended with a laser welding head, a wire feeding assembly, a welding line tracking and blowing device. The laser welding head is connected with laser collimation, the collimation device is connected with a laser through an optical fiber, and the laser is used as a light-emitting source. The wire feeding assembly consists of a wire feeding nozzle, a wire feeding pipe, a wire feeding driving wheel, a wire feeding driven wheel, a motor, a wire feeding hanging disc, a wire controller and other mechanisms.

The rotary platform is provided with a tool fixture, the tool fixture is provided with a pneumatic pressing block, an outer ring positioning pin and an inner ring, electromagnets are distributed on the periphery of the inner ring, and the electromagnets are connected to the slip ring. The tooling jig is provided with a waterway, and the waterway is connected to the slip ring through a water pipe. The tool fixture is provided with an air passage which is connected to the slip ring through an air pipe.

The cold water machine provides water cooling for the jig laser and the laser head.

Further, the robot is a multi-axis robot, and can drive the laser welding head to realize the product with the diameter of more than 500mm, the vertical welding and the double-station welding.

Further, the laser is a continuous laser, and the welding power is greater than 300w.

Furthermore, the laser head is a swing welding head, and the swing frequency and the swing amplitude can be set according to welding requirements.

Further, the laser welding head is provided with a coaxial blowing and monitoring camera.

Further, the rotating platform can drive the product to rotate for one circle to weld.

Further, the weld tracking can identify weld XYZ coordinates for guiding welding. The weld tracking system comprises a preset weld tracking program, and the spot welding position is set in advance. When the product is replaced, the height of the product is different from the position of the welding seam, the welding seam tracking system can acquire coordinates and height information in real time, and the coordinates and the height information are transmitted to a program, so that the welding head is corrected for welding.

Further, the blowing device is used for blowing air for the calandria and is used for protecting welding seams from oxidation in and after welding.

Further, the wire feeding assembly can be replaced to feed wires of different materials and different diameters.

Example 2

A welding system for a hydrogen energy alkaline electrolyzer comprising the tooling fixture of embodiment 1.

Further, the outer ring of the tool fixture is provided with a compressing cylinder, the cylinder rotates 180 degrees to press down for compressing, and the tool fixture is positioned at the highest position at 0 degrees when not in work.

Further, the fixture is provided with a locating pin, so that the product pole frame can be located.

Further, the inner ring edge is provided with an electromagnet on the tool jig, and magnetic force is generated through electrification to attract the edge of the polar plate.

Further, the tooling jig is provided with a circle of waterway at the lower position of the welding seam, so that welding heat can be radiated, and the deformation of the polar plate is reduced.

Further, the tool fixture is provided with an air groove and an air hole, and the appearance of the welding seam is protected through air.

Further, the tool fixture is provided with a slip ring structure, and when the turntable rotates, the wire harness follows the rotation. This avoids wire entanglement during rotation.

Example 3

A process for a hydrogen alkaline electrolyzer comprising a welding system for a hydrogen alkaline electrolyzer of example 1, said welding process comprising the steps of:

s1: a sample was prepared in which the dimensions of the welded product were Φ 180mm x 2mm plate and frame splice welded. The sample piece is cleaned, and residual greasy dirt and the like on the sample piece are removed, so that air holes are avoided after welding.

S2: the pole frame is placed, and is lifted or a manipulator is adopted to place the pole frame according to the position of the locating pin. The cylinder pressing blocks on the jig are adopted, the pressing pole frame is controlled, the single pressure is 20 kg, and the total number of the pressing blocks is 20.

S3: the polar plate is placed, and the polar plate is placed by adopting a hoisting or mechanical arm. And then pressing by adopting a pressing plate, wherein the weight of the pressing block is 100kg, and finally, the electromagnets are electrified to fix the polar plates, and the single suction force of the electromagnets is 8kg, and the total number of the electromagnets is 20.

S4, the following steps: the wire feeder is adjusted, and a compression bar is adjusted, so that the pressure is ensured not to damage the metal wire; adjusting the angle of the wire feeding pipe to 45 degrees; regulating the heights of the silk and the product to be 0.5mm; the position of the adjusting wire coincides with the position of the laser focus, the wire feeding parameters are adjusted, and the wire feeding speed is 10mm/s-15mm/s.

S4: the air blowing angle of the calandria is adjusted to be larger than 30 degrees, and the air blowing amount is 15L/MIN.

And S5, the jig is filled with cooling water at 20 ℃ and with protective gas, wherein the protective gas is argon, and the blowing amount is 15L/MIN.

S6: the robot drives the laser head to move to a welding position, and spot welding is performed by combining the wire feeding assembly and the weld tracking, the distance is 100mm, and primary fixing is performed. And the welding seam tracking acquires XYZ coordinates and transmits the XYZ coordinates to a program, and the robot and the welding head are controlled to follow according to the welding seam.

S7: the robot drives the laser head to move to a welding position, and full welding is performed by combining the wire feeding assembly and the welding seam tracking system.

S8, welding line conditions are double-sided welding, double-sided molding, laser power is 1000w, swing amplitude of a welding head is 2mm, and wire feeding speed is 10mm/S.

Example 4

A process for a hydrogen energy alkaline electrolyzer comprising the process steps of example 3.

The welding seam is formed by single-sided welding and double-sided molding as shown in FIG. 3, the laser power is 1300w, the swing amplitude of a welding head is 2mm, and the wire feeding speed is 15mm/s.

Example 5

The weld joint is formed by single-sided welding and double-sided molding as shown in FIG. 4, the laser power is 1400w, the swing amplitude of a welding head is 2mm, and the wire feeding speed is 15mm/s.

Example 6

The welding seam is formed by double-sided welding and double-sided molding as shown in FIG. 5, the laser power is 1200w, the swing amplitude of a welding head is 2mm, and the wire feeding speed is 10mm/s.

It should be noted that, the use of single-sided welding or double-sided welding may be selected according to the actual needs of the customer. In general, the double-sided welding has lower welding efficiency than single-sided welding in consideration of the need of turning, but has low power and small deformation; while single-sided welding is efficient, but is highly deformed.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A welding system for a hydrogen alkaline electrolyzer is used for welding a polar frame and a polar plate of the hydrogen alkaline electrolyzer and is characterized by comprising a moving mechanism and a rotating platform, wherein,

2. The welding system for the hydrogen energy alkaline electrolytic tank according to claim 1, wherein the tool fixture is of an annular structure, a slip ring is arranged at the center of the tool fixture, a positioning pin is arranged on an outer ring of the tool fixture, a plurality of electromagnets are arranged on an inner ring of the tool fixture, the slip ring is of a hollow structure and is communicated with the rotary platform, the positioning pin is used for positioning a pole frame, and a plurality of electromagnets are used for fixing pole plates.

3. The welding system for a hydrogen energy alkaline electrolyzer of claim 2 wherein the tooling fixture is provided with an annular waterway connected to the slip ring by a pipe.

4. The welding system for a hydrogen energy alkaline electrolyzer of claim 2 wherein the tooling fixture is provided with an air passage connected to the slip ring by a pipe.

5. The welding system for a hydrogen energy alkaline electrolyzer of claim 2 wherein the tooling fixture is provided with a press block for compressing the pole frame.

6. The welding system for a hydrogen alkaline electrolyzer of claim 1 wherein the wire feed assembly comprises a wire feed hanger plate connected to a wire feed conveyor connected to a wire feed tube having a wire feed nozzle at a forward end thereof.

7. A welding system for hydrogen energy alkaline cells as claimed in claim 6 wherein the wire feeder nozzle, wire feeder tube, wire feeder transfer member are all replaceable components and are replaced according to wire diameter and/or material.

8. A welding system for a hydrogen energy alkaline cell in accordance with claim 1 wherein said moving mechanism comprises a multi-axis robot, multi-axis module or multi-axis robotic arm.

9. A welding system for a hydrogen energy alkaline cell in accordance with claim 1 wherein said weld head is a swing weld head.

10. A welding method for a hydrogen alkaline electrolyzer, for welding a polar frame and a polar plate of a hydrogen alkaline electrolyzer, the method comprising:

placing the pole frame on an outer ring of the tool fixture and compacting;

placing the polar plate in an inner ring of a tooling fixture and compacting;

cooling water and protective gas are led into the tool fixture;