Environment-friendly welding device for air-insulated ring main unit and processing method thereof
By designing a welding device that combines an inner clamping plate with springs and support rods, the problems of pre-weld point cracking and gap changes during the welding process of ring main units were solved, achieving stable welding and precise adjustment of weld size, thus ensuring welding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGSU YAKAI ELECTRIC
- Filing Date
- 2026-05-09
- Publication Date
- 2026-06-16
AI Technical Summary
During the welding process of ring main units, existing welding fixtures can easily cause the pre-weld points to bear excessive tensile or shear stress, leading to cracking. Furthermore, the clamping force may alter the gaps in the plates, affecting the welding quality.
An environmentally friendly welding device for air-insulated ring main units, including a welding mechanism and a clamping mechanism, is adopted. The combination design of the inner clamping plate, spring and support rod realizes elastic support and fine adjustment of the workpiece, and stable welding is carried out by slide rail and welding robot.
It effectively prevents cracking of pre-weld joints, maintains stable gaps in sheet metal, ensures welding quality, avoids workpiece distortion during welding, and enables precise adjustment of weld dimensions.
Smart Images
Figure CN122210282A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of ring main unit manufacturing equipment, specifically to a welding device and processing method for an environmentally friendly air-insulated ring main unit. Background Technology
[0002] Ring main units (RMS) are essential components of power distribution networks, widely used in urban power grids, industrial parks, commercial buildings, and wind power generation. The RMS cabinet is typically constructed from stainless steel or aluminum-zinc coated steel sheet. Because the interior of the RMS needs to maintain a dry, leak-free gas environment, the welds must meet high standards of sealing, with no tolerances for welding defects such as porosity, cracks, or lack of fusion.
[0003] The welding process for ring main units typically follows this procedure: First, the sheet metal is pre-treated by bending and punching. Then, pre-welding (also known as spot welding or tack welding) is performed to initially fix the sheet metal into shape, giving the overall unit a cabinet-like form. After pre-welding, the main welds of the cabinet are continuously welded to obtain the final product.
[0004] In subsequent continuous welding processes, welding fixtures are needed to clamp and fix the ring main unit to be welded. Although the ring main unit is basically formed after pre-welding, the pre-welded joints are usually small and have limited strength, serving only as temporary fixation. When the fixture applies clamping force, if the direction or magnitude of the clamping force is improper, it may cause the pre-welded joints to be subjected to excessive tensile or shear stress, leading to cracking. Moreover, the clamping force may also force changes in the gap between the plates—the originally suitable gap may be compressed (leading to incomplete weld penetration) or stretched (leading to burn-through or requiring excessive filler wire), both of which will adversely affect the welding quality. Therefore, how to provide a welding device that can stably maintain the gap between the plates during clamping and has a certain degree of adjustability has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0005] In order to overcome the problems existing in the prior art, this application provides an environmentally friendly welding device and processing method for air-insulated ring main units.
[0006] This application adopts the following technical solution: an environmentally friendly welding device for air-insulated ring main units, including a welding mechanism and a clamping mechanism. The clamping mechanism includes a base, a fixed frame, and a movable frame. The fixed frame is connected to the base, and the movable frame can slide along the length direction of the base. Both the fixed frame and the movable frame are provided with clamping components. A pair of clamping components are used to clamp the workpiece to be welded. The clamping components include an outer clamping plate and an inner clamping plate. The outer clamping plate is provided with studs, and the workpiece passes through the studs and is locked with bolts. The inner clamping plate is located inside the workpiece. The top and bottom of the inner clamping plate are provided with receiving grooves. A first spring and a support rod are provided in the receiving grooves. A pressure strip is provided on the outside of the inner clamping plate. One end of the support rod is located in the receiving groove and is in contact with the first spring. The other end of the support rod is connected to the pressure strip. A pair of pressure strips are used to support the inner sidewall of the workpiece.
[0007] Optionally, the base is provided with a first slide rail and a second slide rail arranged in parallel, and the movable frame is adapted to be disposed on the first slide rail and can slide on the first slide rail; The welding mechanism includes a base and a welding robot. The welding robot is mounted on the base, and the base is adapted to be mounted on the second slide rail and can slide on the second slide rail.
[0008] Optionally, a pair of receiving grooves are provided at the top and bottom of the inner clamping plate, and a support rod is provided in each receiving groove; There is a pressure strip above and below the inner clamping plate. A pair of support rods at the top of the inner clamping plate are used to support the pressure strip located above the inner clamping plate, and a pair of support rods at the bottom of the inner clamping plate are used to support the pressure strip located below the inner clamping plate.
[0009] Optionally, the inner clamping plate is provided with an upper pull plate and a lower pull plate on the side facing away from the outer clamping plate, and the upper pull plate and the lower pull plate are respectively and correspondingly connected to a pair of pressure strips; The bottom of the upper pull plate is provided with a slot, and a second spring is provided in the slot. The lower pull plate is adapted to be inserted into the slot and connected to the second spring. When the pressure strip is in contact with the inner clamping plate, the second spring is in a partially compressed state.
[0010] Optionally, the pressure strip located above and the upper pull plate, as well as the pressure strip located below and the lower pull plate, are connected by connecting plates; The upper pull plate, lower pull plate, and slot all extend along the height direction of the inner clamping plate, and the outer wall of the lower pull plate fits against the inner wall of the slot.
[0011] Optionally, the upper pull plate is provided with a handle at the bottom, and the lower pull plate is provided with a plurality of adjustment slots in the middle. The plurality of adjustment slots are spaced apart along the length direction of the lower pull plate. The operator grips the handle and pulls the corresponding adjustment slot to adjust the insertion depth of the lower pull plate.
[0012] Optionally, the inner clamping plate is provided with a through hole, one end of the through hole is connected to the receiving groove at the top of the inner clamping plate, the other end of the through hole is connected to the receiving groove at the bottom of the inner clamping plate, and a receiving cavity is provided in the middle of the through hole, the inner diameter of the receiving cavity is larger than the inner diameter of the through hole, and the inner diameter of the through hole is larger than the inner diameter of the receiving groove. An upper lead screw and a lower lead screw are inserted into the through hole. The top of the upper lead screw is used to support the first spring located above, and the bottom of the upper lead screw extends into the receiving cavity. The top of the lower lead screw is used to support the first spring located below, and the bottom of the lower lead screw extends into the receiving cavity and is close to the bottom of the upper lead screw. An adjustment knob is provided inside the accommodating cavity. The adjustment knob is sleeved on the bottom of the upper lead screw and the bottom outside of the lower lead screw. The adjustment knob is threadedly connected to both the upper lead screw and the lower lead screw.
[0013] Optionally, the outer wall of the inner clamping plate is provided with an opening, the opening communicating with the receiving cavity, and the adjusting knob extending to the outside of the inner clamping plate through the opening; The accommodating cavity is also provided with a first bearing, which is used to support and fix the adjustment knob, and the adjustment knob can rotate around the axis of the first bearing.
[0014] Optionally, each of the receiving slots has a pad at the bottom, and the bottom of the pad has a second bearing. The top of the upper lead screw and the top of the lower lead screw are adapted to be screwed into the corresponding second bearing, and the threads of the upper lead screw and the lower lead screw have opposite directions.
[0015] An environmentally friendly air-insulated ring main unit processing method, applied to a welding device for an environmentally friendly air-insulated ring main unit, includes the following steps: Step 1: Adjust the position of the movable frame according to the height of the workpiece to be welded, so that the outer wall of the workpiece fits against a pair of outer clamps, and then screw the bolts onto the studs to achieve the initial fixation of the workpiece. Step 2: By grasping the handle at the bottom of the upper pull plate and pulling up the different adjustment slots on the lower pull plate, the relative position of the upper and lower pull plates is roughly adjusted so that the initial distance between the upper and lower pressure strips is slightly less than the height of the inner wall of the workpiece, thereby placing the inner clamping plate inside the workpiece so that the upper and lower pressure strips contact the inner wall of the workpiece. Step 3: Observe and measure the weld size. If the weld size meets the requirements, the welding robot begins welding. If the weld size does not meet the requirements, rotate the adjustment knob. By synchronously moving the upper and lower lead screws in opposite directions, the pressure applied by the first spring to the pressure bar is adjusted, thus achieving fine-tuning of the weld size. Step 4: Start the welding robot and move it along the second slide rail to continuously weld each weld seam of the workpiece. Step 5: After welding is completed, loosen the bolts on the outer clamping plate, push the movable frame back, remove the inner clamping plate, and unload the welded workpiece.
[0016] Compared with the prior art, this application has the following beneficial effects: 1. By setting a receiving groove, a first spring, and a support rod on the inner clamping plate, the pressure strip and the inner clamping plate are elastically connected. When the inner clamping plate is placed inside the workpiece to be welded, the first spring is naturally released and remains in a partially compressed state, thus achieving reliable fixation of the inner clamping plate inside the workpiece. The inner clamping plate provides elastic support for the workpiece, preventing instantaneous impact force from being directly transmitted to the workpiece, and effectively preventing the pre-weld joint from cracking due to excessive tensile or shear stress.
[0017] 2. Elastic support strips are installed above and below the inner clamping plate. These strips always adhere to the inner wall of the workpiece and apply a continuous and uniform elastic support force. By coordinating the upper and lower lead screws with the adjustment knob, rotating the adjustment knob simultaneously drives the upper and lower lead screws to move in opposite directions, thereby synchronously adjusting the initial support height of the top and bottom support strips of the inner clamping plate. This improves the clamping effect on the workpiece and effectively prevents the workpiece from twisting or deforming during clamping. Attached Figure Description
[0018] Figure 1 This is a schematic perspective view of this application; Figure 2 This is a reference diagram showing the explosion state of the outer clamping plate, the workpiece, and the inner clamping plate; Figure 3 It is a schematic 3D diagram of the inner panel; Figure 4 This is a cross-sectional view of the internal structure of the inner panel; Figure 5 This is a reference diagram showing the exploded state of the top and bottom pull plates; In the diagram: 1. Base; 11. First slide rail; 12. Second slide rail; 2. Fixed frame; 3. Movable frame; 4. Clamping assembly; 41. Outer clamping plate; 411. Stud; 412. Bolt; 42. Inner clamping plate; 421. Receiving groove; 422. First spring; 423. Support rod; 424. Through hole; 425. Receiving cavity; 426. Opening; 43. Pressure strip; 44. Upper pull plate; 441. Slot; 442. Second spring; 443. Connecting plate; 444. Handle; 45. Lower pull plate; 450. Adjustment groove; 46. Upper lead screw; 47. Lower lead screw; 48. Adjustment knob; 480. First bearing; 49. Pad; 490. Second bearing; 5. Base; 6. Welding robot. Detailed Implementation
[0019] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0020] like Figure 1-5 As shown, this embodiment provides an environmentally friendly welding device for air-insulated ring main units, including a welding mechanism and a clamping mechanism. The clamping mechanism includes a base 1, a fixed frame 2, and a movable frame 3. The fixed frame 2 is fixedly connected to the base 1, and the movable frame 3 can slide along the length of the base 1 to accommodate workpieces of different lengths. Both the fixed frame 2 and the movable frame 3 are equipped with clamping components 4. A pair of clamping components 4 approach from both ends of the workpiece towards the middle to clamp the workpiece to be welded.
[0021] The clamping assembly 4 includes an outer clamping plate 41 and an inner clamping plate 42. The outer clamping plate 41 is provided with studs 411. The workpiece (i.e., the pre-welded ring main unit cabinet) passes through the studs 411 and is locked in place by bolts 412, fixing the outer clamping plate 41 to the outer wall of the workpiece. Process holes are pre-drilled on the workpiece corresponding to the positions of the studs 411, or existing mounting holes are utilized. The inner clamping plate 42 is located inside the workpiece, opposite to the outer clamping plate 41. The top and bottom of the inner clamping plate 42 are provided with receiving grooves 421, within which a first spring 422 and a support rod 423 are located. A pressure strip 43 is provided on the outer side of the inner clamping plate 42. One end of the support rod 423 is located within the receiving groove 421 and contacts the first spring 422; the other end of the support rod 423 is connected to the pressure strip 43. A pair of pressure strips 43 (the pressure strip 43 above the inner clamping plate 42 and the pressure strip 43 below the inner clamping plate 42) are used to support the inner wall of the workpiece from the inside, that is, the upper and lower pressure strips 43 are respectively attached to the upper inner wall and the lower inner wall of the workpiece.
[0022] Before clamping, the operator first pre-fixes the outer clamping plate 41 to the outer wall of the workpiece using studs 411 and bolts 412. Then, the inner clamping plate 42 is placed inside the workpiece, so that the upper and lower pressure strips 43 contact the upper and lower inner walls of the workpiece. When the movable frame 3 moves towards the fixed frame 2, a pair of clamping components 4 apply clamping force from both ends towards the middle. At this time, the outer clamping plate 41 pushes the outer wall of the workpiece inward, while the pressure strips 43 on the inner clamping plate 42, under the reaction force of the workpiece, compress the first spring 422 through the support rod 423, causing the pressure strips 43 to slightly retract towards the inner clamping plate 42. The compression of the first spring 422 is converted into a continuous elastic support force for the workpiece. In this way, when the clamping force is too large or there is an impact, the first spring 422 is compressed first to absorb energy, avoiding the instantaneous impact force from being transmitted to the pre-welding point and preventing the pre-welding point from cracking. At the same time, the pressure strip 43 and the workpiece maintain an elastic fit. When the outer side of the workpiece is subjected to pressure from the outer clamping plate 41, the internal and external forces are balanced, keeping the weld gap between the workpiece plates within a stable and ideal range, and preventing excessive compression or stretching due to fluctuations in clamping force.
[0023] The base 1 is equipped with a first slide rail 11 and a second slide rail 12 arranged in parallel. The movable frame 3 is adapted to be mounted on the first slide rail 11 and can slide on the first slide rail 11, realizing reliable adjustment of the movable frame 3 and ensuring that workpieces of different sizes can be reliably clamped. The welding mechanism includes a base 5 and a welding robot 6. The welding robot 6 is mounted on the base 5 and can be a six-axis articulated industrial robot. A welding torch is installed at the end of the welding robot 6. The base 5 is adapted to be mounted on the second slide rail 12 and can slide on the second slide rail 12. Through the independent arrangement of the first slide rail 11 and the second slide rail 12, the clamping action and the welding action do not interfere with each other. After the workpiece is clamped and fixed, the welding robot 6 moves along the second slide rail 12 to automatically and continuously weld the welds on the workpiece.
[0024] The inner clamping plate 42 has a pair of receiving grooves 421 at both its top and bottom. Specifically, there is one receiving groove 421 on each of the left and right sides of the top and bottom of the inner clamping plate 42. Each receiving groove 421 contains a support rod 423. There is a pressure strip 43 at both the top and bottom of the inner clamping plate 42. The pair of support rods 423 at the top of the inner clamping plate 42 (one on each side) jointly support the pressure strip 43 located above the inner clamping plate 42, ensuring that the pressure strip 43 is evenly stressed and does not tilt. The pair of support rods 423 at the bottom of the inner clamping plate 42 (one on each side) jointly support the pressure strip 43 located below the inner clamping plate 42. Each support rod 423 is independently equipped with a first spring 422. Even if there are minor unevennesses on the inner wall of the workpiece, each support rod 423 can independently extend and retract to compensate, ensuring that the pressure strip 43 reliably fits against the inner wall of the workpiece.
[0025] An upper pull plate 44 and a lower pull plate 45 are provided on the side of the inner clamping plate 42 facing away from the outer clamping plate 41 (i.e., the side of the inner clamping plate 42 facing the internal space of the workpiece). The upper pull plate 44 and the lower pull plate 45 are respectively and correspondingly connected to a pair of pressure strips 43. The pressure strip 43 located above is connected to the upper pull plate 44 by a connecting plate 443; the pressure strip 43 located below is also connected to the lower pull plate 45 by a connecting plate 443. The connecting plate 443 can adopt an L-shaped or T-shaped structure, with one end connected to the middle of the pressure strip 43 and the other end connected to the pull plate, ensuring smooth force transmission and a compact structure. The bottom of the upper pull plate 44 is provided with a slot 441, and a second spring 442 is provided in the slot 441. The lower pull plate 45 is adapted to be inserted into the slot 441 and connected to the second spring 442. Specifically, the top of the pull-down plate 45 is inserted into the slot 441 at the bottom of the pull-up plate 44, and the second spring 442 presses against the top inner wall of the slot 441 of the pull-up plate 44 and the top end face of the pull-down plate 45.
[0026] When the pressure bar 43 is in contact with the inner clamping plate 42 (i.e., in the normal clamping state), the second spring 442 is in a partially compressed state, meaning it still retains some margin for further compression. Thus, when the upper and lower pressure bars 43 experience uneven stress due to workpiece manufacturing tolerances (for example, the upper pressure bar 43 has been compressed significantly while the lower pressure bar 43 has not yet contacted the workpiece), the second spring 442 allows relative sliding between the upper pull plate 44 and the lower pull plate 45. This allows the pressure bar 43 on the side with greater stress to retract further, while the pressure bar 43 on the side with less stress continues to extend until it contacts the workpiece, thereby preventing the workpiece from twisting or deforming due to excessive localized stress. The second spring 442 is always under compression, ensuring that both the upper and lower pressure bars 43 can apply stable elastic support after clamping. The upper pull plate 44, the lower pull plate 45 and the slot 441 all extend along the height direction (i.e., the vertical direction) of the inner clamping plate 42. The outer wall of the lower pull plate 45 fits against the inner wall of the slot 441 to form a sliding guide fit, ensuring that the lower pull plate 45 does not slant laterally when sliding in the slot 441.
[0027] The bottom of the upper pull plate 44 is provided with a handle 444, which can be inverted U-shaped or ring-shaped for easy gripping. The middle of the lower pull plate 45 is provided with several adjustment slots 450, which are spaced apart along the length direction (i.e., vertical direction) of the lower pull plate 45, for example, a V-shaped or U-shaped slot is provided every 10mm. The operator can manually adjust the insertion depth of the lower pull plate 45 relative to the upper pull plate 44 by gripping the handle 444 and pulling the corresponding adjustment slot 450. Specifically, the operator holds the handle 444 with one hand to lift the upper pull plate 44, and hooks the fingers of the other hand on the adjustment slot 450 at a certain height on the lower pull plate 45. After pulling the lower pull plate 45 up or down to the target position, the operator releases it. The elastic force of the second spring 442 presses the top of the lower pull plate 45 against the bottom of the handle 444 or the top of the slot 441, realizing quick adjustment of the initial distance between the upper and lower pressure bars 43 when clamping workpieces of different heights.
[0028] The inner clamping plate 42 has a through hole 424. One end of the through hole 424 communicates with the receiving groove 421 at the top of the inner clamping plate 42, and the other end of the through hole 424 communicates with the receiving groove 421 at the bottom of the inner clamping plate 42. A receiving cavity 425 is provided in the middle of the through hole 424. The inner diameter of the receiving cavity 425 is larger than the inner diameter of the through hole 424, and the inner diameter of the through hole 424 is larger than the inner diameter of the receiving groove 421 (that is, the diameter is smallest at the receiving groove 421, next largest at the through hole 424, and largest at the receiving cavity 425). An upper lead screw 46 and a lower lead screw 47 pass through the through hole 424. The top of the upper lead screw 46 is used to support the first spring 422 located above (that is, the bottom end of the first spring 422 in the upper receiving groove 421 presses against the top end face of the upper lead screw 46), and the bottom of the upper lead screw 46 extends into the receiving cavity 425. The top of the lower lead screw 47 is used to support the first spring 422 located below (that is, the top of the first spring 422 in the lower receiving groove 421 presses against the top end face of the lower lead screw 47, at which time the support direction of the first spring 422 is opposite, with the pressure bar 43 as a reference). For ease of assembly, one end of the first spring 422 is usually in contact with the support rod 423, and the other end is in contact with the end face of the lead screw. The bottom of the lower lead screw 47 also extends into the receiving cavity 425 and is close to the bottom of the upper lead screw 46, with a gap between them or close to each other.
[0029] An adjusting knob 48 is provided within the accommodating cavity 425, and is sleeved on the bottom of the upper lead screw 46 and the outer side of the bottom of the lower lead screw 47. The adjusting knob 48 is threadedly connected to both the upper and lower lead screws 46 and 47, with the threads of the upper and lower lead screws 47 in opposite directions (e.g., the upper lead screw 46 has a right-hand thread, and the lower lead screw 47 has a left-hand thread). When the adjusting knob 48 is rotated, the upper lead screw 46 and lower lead screw 47 move simultaneously in opposite directions due to the axial limitation of the knob 48. When the adjusting knob 48 is rotated clockwise, the upper lead screw 46 moves upward and the lower lead screw 47 moves downward, causing the upper and lower pressure bars 43 to expand outward simultaneously, increasing the support force on the inner wall of the workpiece; when rotated counterclockwise, the upper lead screw 46 moves downward and the lower lead screw 47 moves upward, causing the upper and lower pressure bars 43 to contract inward simultaneously, reducing the support force or accommodating smaller workpiece heights. In this way, the positions of the upper and lower pressure bars 43 can be precisely and synchronously adjusted, so that when the size of the weld changes during the clamping process, the upper screw 46 and the lower screw 47 can drive the pressure bars 43 to achieve fine adjustment of the weld size, ensuring that the weld size meets the welding requirements.
[0030] An opening 426 is provided on the outer wall of the inner clamping plate 42, which communicates with the receiving cavity 425. The adjusting knob 48 extends to the outside of the inner clamping plate 42 through the opening 426, allowing the operator to directly rotate the adjusting knob 48 from the side of the inner clamping plate 42 without disassembling any parts. A first bearing 480 is also provided in the receiving cavity 425. The outer ring of the first bearing 480 is fixed to the inner wall of the receiving cavity 425, and the inner ring of the first bearing 480 is fitted outside or inside the adjusting knob 48 to support and fix the adjusting knob 48, while allowing the adjusting knob 48 to rotate freely around its axis without axial movement. A pad 49 is provided at the bottom of each receiving groove 421 (i.e., the end away from the pressure strip 43). A second bearing 490 is provided at the bottom of the pad 49. The top of the upper lead screw 46 and the top of the lower lead screw 47 are adapted to be screwed into the corresponding second bearing 490. Specifically, the top of the upper lead screw 46 passes through the through hole 424 at the bottom of the receiving groove 421 and connects to the inner ring of the second bearing 490, while the outer ring of the second bearing 490 is fixed inside the pad 49. When the upper lead screw 46 rotates, the second bearing 490 allows the lead screw to rotate relative to the fixed structure without wear. The pad 49 serves to isolate the first spring 422 from the end of the lead screw, preventing the first spring 422 from bending laterally or getting stuck during compression.
[0031] This embodiment also provides a method for processing an environmentally friendly air-insulated ring main unit, applied to a welding device for an environmentally friendly air-insulated ring main unit, including the following steps: Step 1: Adjust the position of the movable frame 3 according to the height of the workpiece to be welded, so that the outer wall of the workpiece fits against a pair of outer clamps 41, and then screw the bolts 412 onto the studs 411 to achieve the initial fixation of the workpiece. Step 2: By grasping the handle 444 at the bottom of the upper pull plate 44 and pulling up the different adjustment slots 450 on the lower pull plate 45, the relative position of the upper pull plate 44 and the lower pull plate 45 is roughly adjusted so that the initial distance between the upper and lower pressure strips 43 is slightly less than the height of the inner wall of the workpiece, thereby placing the inner clamping plate 42 inside the workpiece so that the upper and lower pressure strips 43 contact the inner wall of the workpiece. Step 3: Observe and measure the weld size. If the weld size meets the requirements, welding robot 6 begins welding. If the weld size does not meet the requirements, rotate the adjustment knob 48. Through the synchronous reverse movement of the upper lead screw 46 and the lower lead screw 47, the pressure applied by the first spring 422 to the pressure bar 43 is adjusted, thereby achieving fine adjustment of the weld size. Step 4: Start the welding robot 6 and move it along the second slide rail 12 to continuously weld each weld seam of the workpiece. Step 5: After welding is completed, loosen the bolts 412 on the outer clamping plate 41, move the movable frame 3 backward, remove the inner clamping plate 42, and unload the welded workpiece.
[0032] The second spring 442 supports the upper pull plate 44 and the lower pull plate 45, achieving elastic contact between the upper and lower pressure bars 43 and the workpiece, reducing the impact of external forces on the workpiece weld. Then, by adjusting the knob 48, the bidirectional lead screw is driven to move synchronously in the opposite direction, achieving fine adjustment of the position of the upper and lower pressure bars 43. This reliably adjusts the elastic force of the first spring 422 on the pressure bars 43, thereby fine-tuning the weld size, ensuring that the weld size meets the design requirements, and effectively preventing cracking of the pre-weld point, providing ideal conditions for subsequent continuous welding.
[0033] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.
Claims
1. An environmentally friendly welding device for an air-insulated ring main unit, comprising a welding mechanism and a clamping mechanism, wherein the clamping mechanism comprises a base (1), a fixed frame (2), and a movable frame (3), the fixed frame (2) being connected to the base (1), the movable frame (3) being slidable along the length of the base (1), and both the fixed frame (2) and the movable frame (3) being provided with clamping components (4), a pair of clamping components (4) being used to clamp the workpiece to be welded, characterized in that, The clamping assembly (4) includes an outer clamping plate (41) and an inner clamping plate (42). The outer clamping plate (41) is provided with a stud (411). The workpiece passes through the stud (411) and is locked by a bolt (412). The inner clamping plate (42) is located on the inner side of the workpiece. The top and bottom of the inner clamping plate (42) are provided with receiving grooves (421). The receiving grooves (421) are provided with a first spring (422) and a support rod (423). The outer side of the inner clamping plate (42) is provided with pressure strips (43). One end of the support rod (423) is located in the receiving groove (421) and is in contact with the first spring (422). The other end of the support rod (423) is connected to the pressure strips (43). A pair of pressure strips (43) are used to support the inner sidewall of the workpiece.
2. The welding device for an environmentally friendly air-insulated ring main unit according to claim 1, characterized in that, The base (1) is provided with a first slide rail (11) and a second slide rail (12) arranged in parallel. The movable frame (3) is adapted to be mounted on the first slide rail (11) and can slide on the first slide rail (11). The welding mechanism includes a base (5) and a welding robot (6). The welding robot (6) is mounted on the base (5). The base (5) is adapted to be mounted on the second slide rail (12) and can slide on the second slide rail (12).
3. The welding device for an environmentally friendly air-insulated ring main unit according to claim 1, characterized in that, The top and bottom of the inner clamping plate (42) are each provided with a pair of receiving grooves (421), and each receiving groove (421) is provided with a support rod (423); There is a pressure strip (43) above and below the inner clamping plate (42). A pair of support rods (423) at the top of the inner clamping plate (42) are used to support the pressure strip (43) located above the inner clamping plate (42), and a pair of support rods (423) at the bottom of the inner clamping plate (42) are used to support the pressure strip (43) located below the inner clamping plate (42).
4. The welding device for an environmentally friendly air-insulated ring main unit according to claim 3, characterized in that, The inner clamping plate (42) is provided with an upper pull plate (44) and a lower pull plate (45) on the side opposite to the outer clamping plate (41). The upper pull plate (44) and the lower pull plate (45) are respectively and correspondingly connected to a pair of pressure strips (43). The bottom of the upper pull plate (44) is provided with a slot (441), and a second spring (442) is provided in the slot (441). The lower pull plate (45) is adapted to be inserted into the slot (441) and connected to the second spring (442). When the pressure strip (43) is in contact with the inner clamping plate (42), the second spring (442) is in a state of incomplete compression.
5. The welding device for an environmentally friendly air-insulated ring main unit according to claim 4, characterized in that, The pressure strip (43) located above and the upper pull plate (44) are connected by a connecting plate (443) and the pressure strip (43) located below and the lower pull plate (45). The upper pull plate (44), the lower pull plate (45) and the slot (441) all extend along the height direction of the inner clamping plate (42), and the outer wall of the lower pull plate (45) fits against the inner wall of the slot (441).
6. The welding device for an environmentally friendly air-insulated ring main unit according to claim 4, characterized in that, The top pull plate (44) is provided with a handle (444) at the bottom, and the bottom pull plate (45) is provided with a plurality of adjustment slots (450) in the middle. The plurality of adjustment slots (450) are spaced apart along the length of the bottom pull plate (45). The operator grasps the handle (444) and pulls the corresponding adjustment slot (450) to adjust the insertion depth of the bottom pull plate (45).
7. The welding device for an environmentally friendly air-insulated ring main unit according to claim 6, characterized in that, The inner clamping plate (42) is provided with a through hole (424). One end of the through hole (424) is connected to the receiving groove (421) at the top of the inner clamping plate (42), and the other end of the through hole (424) is connected to the receiving groove (421) at the bottom of the inner clamping plate (42). A receiving cavity (425) is provided in the middle of the through hole (424). The inner diameter of the receiving cavity (425) is larger than the inner diameter of the through hole (424), and the inner diameter of the through hole (424) is larger than the inner diameter of the receiving groove (421). An upper lead screw (46) and a lower lead screw (47) are inserted into the through hole (424). The top of the upper lead screw (46) is used to support the first spring (422) located above it, and the bottom of the upper lead screw (46) extends into the receiving cavity (425). The top of the lower lead screw (47) is used to support the first spring (422) located below it, and the bottom of the lower lead screw (47) extends into the receiving cavity (425) and is close to the bottom of the upper lead screw (46). An adjustment knob (48) is provided in the accommodating cavity (425). The adjustment knob (48) is sleeved on the bottom of the upper lead screw (46) and the bottom outside of the lower lead screw (47). The adjustment knob (48) is threadedly connected to the upper lead screw (46) and the lower lead screw (47).
8. The welding device for an environmentally friendly air-insulated ring main unit according to claim 7, characterized in that, An opening (426) is provided on the outer wall of the inner clamping plate (42), the opening (426) is connected to the accommodating cavity (425), and the adjusting knob (48) extends to the outside of the inner clamping plate (42) through the opening (426); The accommodating cavity (425) is also provided with a first bearing (480), which is used to support and fix the adjusting knob (48). The adjusting knob (48) can rotate around the axis of the first bearing (480).
9. The welding device for an environmentally friendly air-insulated ring main unit according to claim 7, characterized in that, Each of the receiving grooves (421) has a pad (49) at the bottom, and a second bearing (490) is provided at the bottom of the pad (49). The top of the upper lead screw (46) and the top of the lower lead screw (47) are adapted to be screwed into the corresponding second bearing (490). The threads of the upper lead screw (46) and the lower lead screw (47) are opposite.
10. A method for processing an environmentally friendly air-insulated ring main unit, applied to the welding device for an environmentally friendly air-insulated ring main unit as described in claim 7, characterized in that, Includes the following steps: Step 1: Adjust the position of the movable frame (3) according to the height of the workpiece to be welded so that the outer wall of the workpiece fits against a pair of outer clamps (41), and then screw the bolts (412) onto the studs (411) to achieve the initial fixation of the workpiece. Step 2: By grasping the handle (444) at the bottom of the upper pull plate (44) and pulling up the different adjustment slots (450) on the lower pull plate (45), the relative position of the upper pull plate (44) and the lower pull plate (45) is roughly adjusted so that the initial distance between the upper and lower pressure strips (43) is slightly less than the height of the inner wall of the workpiece, thereby placing the inner clamping plate (42) on the inner side of the workpiece so that the upper and lower pressure strips (43) contact the inner wall of the workpiece. Step 3: Observe and measure the weld size. If the weld size meets the requirements, the welding robot (6) starts welding. If the weld size does not meet the requirements, turn the adjustment knob (48). Through the synchronous reverse movement of the upper screw (46) and the lower screw (47), the pressure applied by the first spring (422) to the pressure bar (43) is adjusted to achieve fine adjustment of the weld size. Step 4: Start the welding robot (6) and move it along the second slide rail (12) to continuously weld each weld seam of the workpiece; Step 5: After welding is completed, loosen the bolts (412) on the outer clamping plate (41), move the movable frame (3) backward, remove the inner clamping plate (42), and unload the welded workpiece.