A welding device for assembling high-voltage distribution cabinet

Abstract

This invention relates to the technical field of welding, specifically to a welding device for assembling high-voltage distribution cabinets, comprising a suspension arm, the mounted end of which is connected to a robotic arm, a rotating mechanism connected to the free end of the suspension arm, and a plasma arc welding machine provided on one side of the rotating mechanism. The rotating mechanism is used to drive the plasma arc welding machine to operate in a circular trajectory. This invention solves the problem of how to operate in a circular trajectory that is not disclosed in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a welding device for assembling a high-voltage distribution cabinet. Background Art

[0002] High-voltage distribution cabinets mainly play the role of power generation, transmission, distribution, and power conversion in the power system. High-voltage distribution cabinets are generally composed of the cabinet itself and high-voltage circuit breakers, high-voltage disconnectors, grounding switches, high-voltage load switches and other components; Reference Figure 1 ( Figure 1 It shows a partial schematic diagram of the high-voltage distribution cabinet. It can be seen from the figure that a plurality of brackets are installed on the inner wall of the cabinet, and high-voltage circuit breakers, high-voltage disconnectors, grounding switches, high-voltage load switches and other components need to be fixedly installed on the brackets; among them, further combined with Figure 2 The schematic diagram of a high-voltage circuit breaker assembled on a single bracket is shown in the figure. The high-voltage circuit breaker is installed on the corresponding bracket, and four wires need to be connected to the four pins of the high-voltage circuit breaker (for example, the four wires are A wire, B wire, C wire, and D wire). The four wires need to be connected to the corresponding bracket through a slot. The manufacturing process of the above-mentioned high-voltage power distribution cabinet mainly involves the process steps of design, material selection, blanking (such as cutting, tailoring), bending, welding, assembly, testing, and packaging. Among them, the welding process step further involves: one end of the wire needs to be welded to the corresponding pin of the high-voltage circuit breaker using a welding device, such as Figure 2 As shown in, for example, after the D-line connection coil is socketed and assembled with one of the pins of the high-voltage circuit breaker, it is necessary to use a welding device to weld the socketed connection coil and pins. The relevant prior art of welding equipment is disclosed in the Chinese Patent Library. For example, the publication number CN116532859A discloses a welding device for a distribution cabinet, including a base, a frame, a support plate, and a telescopic mechanism, including: a welding component: an electric welder slides vertically in the vertical frame; an anti-bias component: the bottom of the shaft column is rotatably connected to a square block that abuts against the inner wall of the frame, and the bottom of the sliding frame is installed with a stop frame that abuts against the outer wall of the frame; a side-changing component: a transmission member is provided on the shaft column, and the rotating sleeve controls the sliding frame to slide along the side extension frame through the transmission member when moving vertically.

[0003] Another example is a welding device for processing power distribution cabinets with publication number CN117984027A. This application provides a first roller that can roll against the welding position of the female corner of the power distribution cabinet. With the help of the rolling guidance of the first roller, the lower end of the welding head and the welding position can maintain a stable state for a long time during the welding movement. At the same time, the second connecting frame is flipped after adjustment so that the second roller and the welding head are symmetrically arranged and form mutually perpendicular right-angled surfaces, so that they can limit and support when welding the male corner of the power distribution cabinet, and then guide the movement of the adjusted welding head again, so that it can automatically maintain a stable state when welding the male corner, which reduces the operating difficulty of the welding device during use to a certain extent, effectively reduces the labor intensity of the staff, and is conducive to improving welding efficiency.

[0004] The above two disclosed prior arts (CN116532859A, CN117984027A) have the problem that when a welding device is used to weld the connection between the coil and the pin, the welding device must move in a circular trajectory, but the above existing welding devices do not disclose how to achieve the operation of the circular trajectory. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a welding device for assembling a high-voltage distribution cabinet, which mechanically enables the welding device to operate in a circular trajectory, thereby solving the problem that the prior art does not disclose how to operate in a circular trajectory.

[0006] The invention discloses a welding device for assembling a high-voltage power distribution cabinet, comprising a suspension arm, a mounting end of the suspension arm being connected to a mechanical arm, a rotating mechanism being connected to a free end of the suspension arm, a plasma arc welding machine being arranged on one side of the rotating mechanism, and the rotating mechanism being used to drive the plasma arc welding machine to operate in a circular track; the rotating mechanism comprising an annular gear, an annular groove body being formed inside the annular gear, a roller being slidably contacted and adapted inside the annular groove body, the roller being transferred to a sliding arm, and a servo motor for driving the roller to rotate being installed on the sliding arm; a transmission gear being meshed and linked to the sliding arm on the outer side of the annular gear, the transmission gear being transferred to the sliding arm; a central axis of the transmission gear being concentrically transferred to a cavity; a sleeve being concentrically connected to the annular gear, a limiting ring groove being formed outside the sleeve, and a free end of a support arm on the cavity being slidably adapted to the limiting ring groove; a plasma arc welding machine being installed on the cavity, and the sleeve being fixedly connected to the suspension arm through a hanging seat; when the sleeve is placed directly above a corresponding connecting coil and a pin, a welding gun mouth of the plasma arc welding machine is opposite to one of the connecting coils and the pins.

[0007] Specifically, the rotating mechanism also includes a piston cover, which is vertically slidably connected to the cavity through a protrusion, and the sealed space between the piston cover and the cavity is used to store coolant; a threaded hole is provided in the center of the piston cover, and the center axis is threadedly assembled on the threaded hole; the cavity is connected to a liquid injection tube; when the sleeve is placed directly above the corresponding connecting coil and pin, the liquid outlet of the liquid injection tube is opposite to the connection point of the connecting coil and pin.

[0008] Optimally, the present invention further comprises a deviation correction and alignment mechanism, which is connected to the suspension arm and is used for pulling the connection coil to be directly above the corresponding pin.

[0009] Specifically, the deviation correction and alignment mechanism includes two supports, which are arranged in parallel and form a gap. A single support is horizontally slidably connected to a slide, and a first elastic component is connected between the support and the slide; a claw is movably connected to the slide, and two claws arranged opposite to each other are used to hold the wire on one side of the docking coil; the slide is connected to a driving unit, and the two driving units drive the two claws to move towards each other; the arm of the slide is vertically slidably connected to a vertical plate, and the vertical plate is fixedly connected to the suspension arm, and a second elastic component is connected between the vertical plate and the arm of the slide; the two supports are limited to the corresponding partition grooves, and the sleeve is placed directly above the corresponding pin; when the vertical plate and the slide form a conflict, the welding gun mouth of the plasma arc welding machine moves to the edge of the pin; when the second elastic component is in a natural state, the vertical plate and the slide are arranged opposite to each other and separated.

[0010] As one of the implementation modes of the driving unit, the driving unit is an electric telescopic rod, the electric telescopic rod is fixedly connected to the sliding seat, and the telescopic shaft of the electric telescopic rod is fixedly connected to the corresponding claw.

[0011] Optimally, a locking hole is provided on the slide seat, and the locking hole is opposite to the free end of the vertical plate.

[0012] The beneficial effects of the present invention are:

[0013] The present invention combines a rotating mechanism and a plasma arc welding machine, and can utilize the rotating mechanism to effectively drive the plasma arc welding machine placed above the connection point of the coil and the pin to realize circular trajectory operation, thereby ensuring that the plasma arc welding machine can realize continuous welding while spot welding; compared with the prior art, the present invention solves the problem of how to operate in a circular trajectory that is not disclosed in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a partial schematic diagram of the high-voltage distribution cabinet.

[0015] Figure 2 Schematic diagram of assembling a high voltage circuit breaker for a single bracket.

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the welding device used for assembling high-voltage distribution cabinets.

[0017] Figure 4 Schematic diagram of the installation structure of the rotating mechanism.

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the rotating mechanism.

[0019] Figure 6 Schematic diagram of the installation structure of the optimized rotating mechanism.

[0020] Figure 7 It is a schematic diagram of the assembly structure of the deviation correction and alignment mechanism.

[0021] Figure 8 It is a schematic diagram of the three-dimensional structure of the driving unit of the second embodiment.

[0022] Fig. 9 It is a schematic diagram of the structure of the present invention in use state.

[0023] In the figure, 1, suspension arm; 2, lifting ring; 3, ring gear; 4, ring groove body; 5, roller; 6, sliding arm; 7, servo motor; 8, transmission gear; 9, central axis; 10, cavity; 11, support arm; 12, sleeve; 13, limit ring groove; 14, plasma arc welding machine; 15, hanging seat; 16, piston cover; 17, injection pipe; 18, bump; 19, connecting coil; 20, pin; 21, bracket; 22, partition groove; 23, crossbeam; 24, positioning seat; 25, second elastic component; 26, third elastic component; 27, fourth elastic component; 28, slide seat; 29, claw; 30, vertical plate; 31, wedge block; 32, bearing plate; 33, arc groove seat; 34, locking hole. DETAILED DESCRIPTION

[0024] In order to clearly understand the technical solution of the present application, a welding device for assembling a high-voltage distribution cabinet provided by the present application will be described in detail below in combination with specific embodiments and drawings.

[0025] The terms used in the following embodiments are only for the purpose of describing specific embodiments, and are not intended to be used as limitations to the present application. As used in the specification and claims of the present application, the singular expressions "one", "a kind of", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" refer to one, two or more than two.

[0026] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0027] Embodiment 1: This embodiment provides a welding device for assembling a high-voltage distribution cabinet. Figure 3 , which shows a three-dimensional structural schematic diagram of a welding device for assembling a high-voltage distribution cabinet. It can be seen from the figure that the present invention includes a suspension arm 1, and a hanging ring 2 is formed at the mounting end of the suspension arm 1; the hanging ring 2 is connected to the clamping claw of the mechanical arm, and the mechanical arm can directly use existing products available on the market, which will not be described in detail here; a rotating mechanism is installed on the free end of the suspension arm 1, and a plasma arc welding machine 14 is provided on one side of the rotating mechanism (existing products can be used, which will not be described in detail here), and the rotating mechanism is used to drive the plasma arc welding machine 14 to operate in a circular trajectory, thereby realizing effective welding of the connection between the coil and the pin 20; the specific structure of the rotating mechanism is as follows.

[0028] refer to Figure 4-5 , Figure 4 The figure shows the installation structure diagram of the rotating mechanism. Figure 5 The three-dimensional structure diagram of the rotating mechanism is shown. As shown in the above two figures, the rotating mechanism includes a ring gear 3, an annular groove body 4 is formed on the inner wall of the ring gear 3, a roller 5 is slidably contacted and adapted in the annular groove body 4, the roller 5 is rotatably connected to one end of a sliding arm 6, and a servo motor 7 for driving the roller 5 to rotate is fixedly connected to the sliding arm 6; a transmission gear 8 is meshed on the external teeth of the ring gear 3, and the transmission gear 8 is rotatably connected to the other end of the sliding arm 6; the bottom center axis 9 of the transmission gear 8 is rotatably connected to the bottom center of the cavity 10, and the outer wall of the cavity 10 is fixedly connected to the servo motor 7 for driving the roller 5 to rotate. A support arm 11 is connected; a sleeve 12 is concentrically connected to the bottom of the ring gear 3, a limiting ring groove 13 is formed on the outer wall of the sleeve 12, and the free end of the support arm 11 is slidably fitted with the limiting ring groove 13; a plasma arc welding machine 14 is fixedly installed on the bottom of the cavity 10, and an L-shaped hanger 15 is fixedly connected to the inside of the sleeve 12 by welding, and the other end of the hanger 15 is fixedly connected to the suspension arm 1; at the same time, it is defined that when the sleeve 12 is placed directly above the assembled connecting coil 19 and the pin 20, the welding gun mouth of the plasma arc welding machine 14 is opposite to one of the connection points of the connecting coil 19 and the pin 20.

[0029] The working principle of the welding device for assembling high-voltage distribution cabinets is as follows: first, use the robotic arm to drive the suspension arm 1 and the rotating mechanism, and the plasma arc welding machine 14 to move toward one of the pairs of connected coils 19 and pins 20, until the sleeve 12 of the rotating mechanism moves to just above the coil 19; continue to move the plasma arc welding machine 14 downward through the robotic arm until the welding gun mouth of the plasma arc welding machine 14 contacts the connection between the coil 19 and the pin 20. Then, the plasma arc welding machine 14 is started, so that the plasma arc welding machine 14 begins to weld the connection between the butt coil 19 and the pin 20; at the same time, the servo motor 7 is started, and the servo motor 7 drives the roller 5 to rotate. At this time, due to the meshing linkage between the transmission gear 8 and the ring gear 3, the transmission gear 8, the sliding arm 6 and the rotating roller 5 jointly limit the roller 5 to revolve along the a1 direction on the ring gear 3 in a circular trajectory; and the transmission gear 8 rotates along the a2 direction during the movement. Here, the transmission gear 8 rotates on the ring gear 3 to ensure the smoothness of the movement of the transmission gear 8; the support arm 11 on the cavity 10 is limited by the limiting ring groove 13, so that the support arm 11 drives the cavity 10 to move along the limiting ring groove 13, and the cavity 10 does not rotate at this time. Finally, the moving cavity 10 carries the plasma arc welding machine 14 and revolves along the ring gear 3 , so that the plasma arc welding machine 14 moving in a circular trajectory can weld all the connections between the coil 19 and the pin 20 .

[0030] The present invention combines a rotating mechanism and a plasma arc welding machine 14, and can utilize the rotating mechanism to effectively drive the plasma arc welding machine 14 placed above the connection point of the connecting coil 19 and the pin 20 to realize circular trajectory operation, thereby ensuring that the plasma arc welding machine 14 can realize continuous welding while spot welding; compared with the prior art, the present invention solves the problem of how to operate in a circular trajectory that is not disclosed in the prior art.

[0031] After welding the connection between the coil 19 and the pin 20 by the plasma arc welding machine 14, it is necessary to perform appropriate cooling treatment in order to stabilize the performance and quality of the weld. To this end, the present invention makes the following optimization scheme: Figure 6, which shows a schematic diagram of the installation structure of the optimized rotating mechanism. It can be seen from the figure that the rotating mechanism also includes a piston cover 16, which is slidably fitted with the cavity 10, and the sealed space formed between the piston cover 16 and the cavity 10 is used to store coolant (such as pure water, etc.); a threaded hole is provided at the center of the piston cover 16, and a thread is formed on the central axis 9, and the thread of the central axis 9 forms a threaded fit with the threaded hole; a liquid injection tube 17 is provided on the outer surface of the cavity 10, and the liquid injection tube 17 is connected with the cavity 10; when the sleeve 12 is placed directly above the connecting coil 19 and the pin 20, the liquid outlet of the liquid injection tube 17 is opposite to the connection point of the connecting coil 19 and the pin 20; bumps 18 are formed on both sides of the piston cover 16, and the bumps 18 form a vertical sliding connection with the slide grooves on the adjacent inner walls of the cavity 10. The operating principle is that when the transmission gear 8 rotates and revolves synchronously, due to the rotation of the transmission gear 8 and the center shaft 9, and the limitation of the piston cover 16 by the slide groove of the cavity 10, the piston cover 16 moves downward in the cavity 10, thereby compressing the coolant in the cavity 10, so that the coolant is sprayed out from the liquid outlet of the injection pipe 17 and cools the weld.

[0032] Because the connecting coil 19 and the pin 20 are in a misaligned state before the connecting coil 19 and the pin 20 are sleeved, the connecting coil 19 of the wire and the pin 20 of the high-voltage circuit breaker are in a misaligned state; at this time, it is necessary to pull the connecting coil 19 to the top of the pin 20 before welding. In view of the above problems, the present invention designs a deviation correction and alignment mechanism. Figure 7 It can be seen that, among them, Figure 7 The figure shows the assembly structure diagram of the deflection correction and alignment mechanism, which is connected to the suspension arm 1 and is used to pull the connecting coil 19 to the top of the corresponding pin 20. The specific structure of the deflection correction and alignment mechanism is as follows.

[0033] Continue to see Figure 7 , the deviation correction and alignment mechanism includes two supports, which are arranged in parallel and form a gap. A slide 28 is horizontally slidably connected to the crossbeam 23 of a single support, and a first elastic component (not shown in the figure, such as a spring, etc.) is connected between the crossbeam 23 and the slide 28; a claw 29 is movably connected to the slide 28, and the two claws 29 are arranged opposite to each other. The two claws 29 are used to hold the wire on one side of the connection coil 19; a driving unit is connected to the slide 28, and the two driving units drive their respective claws 29 to move towards each other; a vertical plate 30 is vertically slidably connected to the arm of the slide 28, and the vertical plate 30 is fixedly connected to the suspension arm 1, and a second elastic component 25 (such as a spring, etc.) is connected between the vertical plate 30 and the arm of the slide 28, and the bottom of the vertical plate 30 is opposite to the slide 28; at the same time, the following definition is made: when the two supports are placed in the corresponding slots 22 on the surface of the high-voltage circuit breaker (the slots 22 are in Figure 2As shown in the figure, the sleeve 12 is placed directly above the pin 20 of the high-voltage circuit breaker; when the vertical plate 30 and the slide seat 28 form a conflict, the welding gun mouth of the plasma arc welding machine 14 moves to the edge of the pin 20; when the second elastic component 25 is in a natural state, the vertical plate 30 and the slide seat 28 are in a separated state.

[0034] The working principle of the deviation correction and alignment mechanism is as follows: First, the suspension arm 1, the rotating mechanism, the plasma arc welding machine 14, and the deviation correction and alignment mechanism are moved toward the high-voltage circuit breaker by a mechanical arm until the support enters the corresponding compartment 22 of the high-voltage circuit breaker and the sleeve 12 is placed above the pin 20. Then, see Figure 6 , since the support is limited by the partition groove 22, when the mechanical arm is used to push the suspension arm 1 to continue to move along the b1 direction, the slide 28 moves on the support along the b1 direction until the two claws 29 are placed beside the wire on one side of the connection coil 19; the drive unit is started, and the two claws 29 are moved close to the wire through the drive unit until the two claws 29 hold the wire; the mechanical arm is withdrawn to return to its original position, and the slide 28 is also restored to its original position under the action of the first elastic component, and the connection coil 19 is opposite to the pin 20. Finally, the mechanical arm is continued to press the suspension arm 1 down along the c1 direction until the vertical plate 30 and the slide 28 form a conflict, and the welding gun mouth of the plasma arc welding machine 14 moves to the edge of the pin 20. At this time, the rotating mechanism and the plasma arc welding machine 14 are used to weld the connection between the connection coil 19 and the pin 20.

[0035] As a further limitation on the driving unit, the present invention provides the following two implementation modes, and the specific solutions are as follows.

[0036] In the first embodiment, the driving unit of this embodiment directly adopts an electric telescopic rod, which is fixedly connected to the slide 28, and the telescopic shaft of the electric telescopic rod is fixedly connected to the corresponding claw 29. This embodiment is not shown in the figure.

[0037] The second implementation method, refer to Figure 8, which shows a three-dimensional structural schematic diagram of the driving unit of the second embodiment. It can be seen from the figure that the driving unit of this embodiment includes a wedge block 31, the slope surface of the wedge block 31 is arranged opposite to the vertical plate 30, the wedge block 31 is slidably connected to the slide 28 and is fixedly connected with the claw 29; a third elastic component 26 (such as a spring, etc.) is connected between the slide 28 and the claw 29, and the elasticity of the second elastic component 25 is greater than the elasticity of the third elastic component 26. When this embodiment is used, after the two claws 29 are located on both sides of the corresponding wire, the suspension arm 1 and the vertical plate 30 are moved downward by the mechanical arm, and as the vertical plate 30 gradually contacts the slide 28, the two vertical plates 30 push the corresponding wedge block 31 to move in the direction of d1 or d2 until the vertical plate 30 contacts the slide 28. The present invention drives the wedge block 31 to move by the power of the vertical plate 30 moving downward, and then uses the wedge block 31 to push the claw 29 to move.

[0038] from Figure 2 It can be seen that the partition 22 and the wire are connected to form a wire groove together; after the wire enters the partition 22, in order to save space, the wire needs to be bent first so that the wire and the surface of the partition 22 are fully fitted; for this purpose, the present invention further optimizes the deviation correction and alignment mechanism, such as Figure 8 As shown in the figure, the deviation correction and alignment mechanism also includes a bearing plate 32, one end of the bearing plate 32 is fixedly connected to the suspension arm 1, and an arc slot seat 33 is fixedly connected to the lower surface of the other end of the bearing plate 32; the support here includes a crossbeam 23 and a positioning seat 24, the crossbeam 23 is slidably connected to the positioning seat 24 in a horizontally extending manner, a fourth elastic component 27 is connected between the positioning seat 24 and the crossbeam 23, and the elastic force of the fourth elastic component 27 is greater than the sum of the elastic forces of the second elastic component 25 and the third elastic component 26; at the same time, it is stipulated that when the vertical plate 30 and the sliding seat 28 form a conflict, the arc slot seat 33 and the wire in the partition slot 22 on the adjacent side of the wire are relative and separated. When in use, when the vertical plate 30 and the slide seat 28 form a conflict, the arc slot seat 33 and the wire are in a separated state; then the mechanical arm is used to continue to move the suspension arm 1 downward, and the vertical plate 30 pushes the slide seat 28 and the crossbeam 23 to move downward (at this time, the connecting coil 19 sleeved on the pin 20 also moves up and down a short distance on the pin 20 accordingly), and the crossbeam 23 compresses the fourth elastic component 27 and slides downward on the positioning seat 24 until the wire is pressed down and fits onto the wire and the partition slot 22.

[0039] As a further optimization of the present invention, refer to Figure 7-8 A locking hole 34 is provided on the slide 28 , and the locking hole 34 is opposite to the free end of the vertical plate 30 , so that when the vertical plate 30 contacts the slide 28 , the vertical plate 30 can be placed in the locking hole 34 .

Claims

1. A welding device for assembling a high-voltage distribution cabinet, characterized in that: The invention comprises a suspension arm (1), wherein the mounting end of the suspension arm (1) is connected to a mechanical arm, and the free end of the suspension arm (1) is connected to a rotating mechanism, and a plasma arc welding machine (14) is provided on one side of the rotating mechanism, and the rotating mechanism is used to drive the plasma arc welding machine (14) to operate in a circular trajectory; the rotating mechanism comprises a ring gear (3), a ring groove body (4) is formed in the ring gear (3), a roller (5) is slidably contacted and adapted in the ring groove body (4), the roller (5) is connected to a sliding arm (6), and a servo motor (7) for driving the roller (5) to rotate is installed on the sliding arm (6); the outer side of the ring gear (3) is meshed with a transmission gear (8), and the transmission gear (8) is connected to the sliding arm (6); the central axis (9) of the transmission gear (8) is connected concentrically with the cavity (10); A sleeve (12) is coaxially connected to the ring gear (3), a limiting ring groove (13) is formed outside the sleeve (12), and a free end of the support arm (11) on the cavity (10) is slidably matched with the limiting ring groove (13); a plasma arc welding machine (14) is installed on the cavity (10), and the sleeve (12) is fixedly connected to the suspension arm (1) through a suspension seat (15); when the sleeve (12) is placed directly above the assembled connection coil (19) and the pin (20), the welding gun mouth of the plasma arc welding machine (14) is opposite to one of the connection points of the connection coil (19) and the pin (20); and the correction and alignment mechanism is also included, which is connected to the suspension arm (1) and is used to pull the connection coil (19) to directly above the corresponding pin (20); the correction and alignment mechanism includes two supports, which are arranged in parallel and form a gap, and a single support is horizontally slidably connected to a slide seat (28), and the support and the slide seat (28); a first elastic component is connected between the slide seat (28); a claw (29) is movably connected to the slide seat (28), and the two claws (29) arranged opposite to each other are used to hold the wire on one side of the docking coil (19); a driving unit is connected to the slide seat (28), and the two driving units drive the two claws (29) to move towards each other; a vertical plate (30) is vertically slidably connected to the holding arm of the slide seat (28), and the vertical plate (30) is fixedly connected to the suspension arm (1), and a second elastic component (25) is connected between the vertical plate (30) and the holding arm of the slide seat (28); after the two supports are limited to the corresponding partition grooves (22), the sleeve (12) is placed directly above the corresponding pin (20); when the vertical plate (30) and the slide seat (28) form a conflict, the welding gun mouth of the plasma arc welding machine (14) moves to the edge of the pin (20); when the second elastic component (25) is in a natural state, the vertical plate (30) and the slide seat (28) are arranged opposite to each other and separated.

2. The welding device for assembling a high-voltage distribution cabinet according to claim 1 is characterized in that: The rotating mechanism also includes a piston cover (16), the piston cover (16) and the cavity (10) are vertically slidably connected via a protrusion (18), and the sealed space between the piston cover (16) and the cavity (10) is used to store coolant; a threaded hole is provided at the center of the piston cover (16), and the center axis (9) is threadedly assembled on the threaded hole; the cavity (10) is connected to a liquid injection pipe (17); when the sleeve (12) is placed directly above the corresponding connecting coil (19) and the pin (20), the liquid outlet of the liquid injection pipe (17) is opposite to the connection point between the connecting coil (19) and the pin (20).

3. The welding device for assembling a high-voltage distribution cabinet according to claim 1 is characterized in that: The driving unit is an electric telescopic rod, which is fixedly connected to the slide seat (28), and the telescopic shaft of the electric telescopic rod is fixedly connected to the corresponding claw (29).

4. The welding device for assembling a high-voltage distribution cabinet according to claim 1 is characterized in that: A locking hole (34) is provided on the sliding seat (28), and the locking hole (34) is opposite to the free end of the vertical plate (30).

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