Water cooling machine room steel pipe welding device and method

Abstract

The invention provides a water cooling machine room steel pipe welding device and method, and belongs to the technical field of steel pipe welding. The counterweight V-shaped block is fixedly connected to the top of the bottom plate, and a fixed clamping block is arranged between the inner walls of the counterweight V-shaped block; the adjusting mechanism is arranged at the top of the bottom plate, the adjusting mechanism is connected with the fixed clamping block and used for moving the fixed clamping block, the adapter rod drives the movable clamping block to lift upwards, the movable clamping block is lifted to be away from the unwelded steel pipe, the included angle between the movable clamping block and the fixed clamping block is larger than 80 degrees, then a servo motor is powered on, and the servo motor drives the movable clamping block to move upwards; the lead screw moves down the displacement assembly and the clamping assembly through sliding fit between the lead screw and the sliding block, clamping of a pipe fitting is relieved, a single unwelded steel pipe is flexibly clamped in a narrow space, the butt joint difficulty between the unwelded steel pipe and the steel pipe to be welded is effectively reduced, the welding operation time between the steel pipes in the water cooling machine room is shortened, the welding operation is accelerated, and the welding efficiency is improved. And then the welding operation efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel pipe welding, and particularly relates to a steel pipe welding device and method for a chilled water machine room. Background Art

[0002] The chilled water machine room is the core part of the air conditioning system, mainly used for refrigeration and supplying chilled water (usually 7°C for water supply and 12°C for water return), providing a cold source for the air conditioning terminals in the building (such as fan coils, air handling units, etc.). The chilled water machine room consists of a chilled water machine room, chilled water pumps, cooling water pumps, and auxiliary equipment, etc., and various component devices are connected by pipelines. To ensure the connection tightness between the devices, some steel or alloy pipelines are connected by welding.

[0003] A welding device is a special equipment used to achieve permanent connection between materials (such as metals, plastics, etc.). By means of heating, pressurization, or a combination of both, the surface of the workpiece is melted or reaches a plastic state, and a firm joint is formed after cooling. It is an indispensable core equipment in modern industrial manufacturing and is widely used in fields such as machinery manufacturing, automobiles, ships, aerospace, construction, and energy.

[0004] The authorized publication number "CN118417988B" records "a straight seam steel pipe welding device, which relates to the technical field of steel pipe processing and solves the problem of insufficient grinding before welding. This straight seam steel pipe welding device includes a base. The output end of the third motor is connected to the second rotating shaft. A support plate is fixed on the top of the slider. On the other side of the upper end surface of the base, a second fixing frame is fixed. The second rotating shaft passes through the second support and the support plate and is rotatably connected to the second fixing frame. On both ends of the outside of the second rotating shaft, second gears are symmetrically and slidably connected. The second gears are meshed and connected to the front side of the clamping mechanism; in the present invention, the steel pipe is pushed between the first grinding block and the second grinding block. The first grinding block and the second grinding block clamp the edge of the steel pipe. After using the pressing plate to press the first grinding block and the second grinding block tightly, the steel pipe rotates at a high speed, and the first grinding block and the second grinding block can grind the inner and outer edges of the end of the steel pipe to ensure that the end is smooth and flat."

[0005] Through the mutual cooperation of the support block and the welding gun set in the above patent, the purpose of automatic welding can be achieved. After completing the grinding operation, the rotating shaft is rotated to withdraw the support block from between the two steel pipes. While splicing the two steel pipes together, the welding gun moves upward. The larger the outer diameter of the steel pipe, the smaller the upward movement distance of the welding gun. The larger the outer diameter of the steel pipe, the larger the upward movement distance of the welding gun. While the welding gun is operating, the steel pipe rotates slowly, which is convenient for automatic welding. However, limited by the narrow space in the chilled water machine room and the limited working space between various devices, the existing welding device cannot accurately dock the steel pipes in a narrow space, resulting in a reduction in the welding operation efficiency. Therefore, we propose a steel pipe welding device and method for a chilled water machine room. Summary of the Invention

[0006] The object of the present invention is to provide a steel pipe welding device and method for a chilled water machine room, aiming to assist the movement of steel pipes through a mechanical structure, move the steel pipes in the narrow chilled water machine room, enable precise docking between the steel pipes, accelerate the welding operation, and thus improve the welding operation efficiency.

[0007] To achieve the above object, the present invention provides the following technical solutions: A steel pipe welding device for a chilled water machine room, comprising a bottom plate; A counterweight V-shaped block, the counterweight V-shaped block is fixedly connected to the top of the bottom plate, and a fixed clamping block is arranged between the inner walls of the counterweight V-shaped block; and An adjusting mechanism, the adjusting mechanism is arranged on the top of the bottom plate, and the adjusting mechanism is connected to the fixed clamping block for moving the fixed clamping block.

[0008] As a preferred solution of the present invention, the adjusting mechanism includes a lifting component, a rotating component, a limiting component, a clamping component and a displacement component. The clamping component is arranged on the upper side of the bottom plate, the clamping component is connected to the fixed clamping block, the lifting component is arranged on the top of the bottom plate, the lifting component is located on one side of the counterweight V-shaped block, the displacement component is arranged on one side of the lifting component, the displacement component is connected to the clamping component, the rotating component is arranged on the other side of the lifting component, the rotating component is connected to the displacement component, the limiting component is arranged at the side end of the lifting component, and the limiting component is connected to the driving component.

[0009] As a preferred solution of the present invention, the lifting component includes a support frame, a slider, a partition plate, a limiting groove, a limiting block, a lead screw and a servo motor. The support frame is fixedly connected to the top of the bottom plate, the partition plate is fixedly connected between the inner walls of the support frame, the partition plate is fixedly connected between the inner walls of the support frame, the lead screw is rotatably connected between the inner walls of the support frame, and one end of the lead screw extends to the bottom of the partition plate. The servo motor is fixedly connected to the top of the bottom plate, the servo motor is located between the inner walls of the support frame, and the output end of the servo motor is fixedly connected to the extended end of the lead screw. The slider is sleeved on the circumferential surface of the lead screw, the slider is located between the inner walls of the support frame, and the slider is located above the partition plate. There are two limiting grooves, the two limiting grooves are opened at the two side ends of the support frame, both of the two limiting grooves are communicated with the inner wall of the support frame, there are two limiting blocks, the two limiting blocks slide between the inner walls of the two limiting grooves, and both of the two limiting blocks are communicated with the slider.

[0010] As a preferred embodiment of the present invention, the clamping assembly includes a movable clamping block, a receiving groove, a transfer rod, and a first electric push rod. The receiving groove is formed at the side end of the fixed clamping block. The movable clamping block is rotatably connected between the inner walls of the receiving groove. The transfer rod is fixedly connected to the top of the transfer rod and is located between the inner walls of the receiving groove. The first electric push rod is rotatably connected between the inner walls of the receiving groove, and the output end of the first electric push rod is rotatably connected to the transfer rod.

[0011] As a preferred embodiment of the present invention, the rotating assembly includes a rotating shaft, a driven gear, a driving gear, a stepping motor, and a gear cover. The gear cover is fixedly connected to the side end of the slider. The rotating shaft is rotatably connected to one side of the slider. One end of the rotating shaft penetrates through the slider, and one end of the rotating shaft extends to the side end of the gear cover. The driven gear is fixedly connected to the circumferential surface of the rotating shaft and is located between the inner walls of the gear cover. The stepping motor is fixedly connected to the side end of the gear cover, and the output end of the stepping motor movably penetrates to the inner wall of the gear cover. The driving gear is fixedly connected to the output end of the stepping motor. The driving gear is located between the inner walls of the gear cover and meshes with the driven gear.

[0012] As a preferred embodiment of the present invention, the limiting assembly includes a ratchet cover, a ratchet, a pawl, and a second electric push rod. The ratchet cover is sleeved on one end of the rotating shaft and is fixedly connected to the side end of the gear cover. The ratchet is fixedly connected to the extended end of the rotating shaft and is located between the inner walls of the ratchet cover. The pawl is rotatably connected between the inner walls of the ratchet cover and is engaged with the ratchet. The second electric push rod is fixedly connected to the side end of the ratchet cover, and the output end of the second electric push rod is rotatably connected to the pawl.

[0013] As a preferred embodiment of the present invention, the displacement assembly includes a U-shaped block, a sliding hole, a sliding rod, a third electric push rod, and a bearing. The U-shaped block is sleeved on one end of the fixed clamping block and is fixedly connected to the rotating shaft. The bearing is fixedly connected between the slider and the U-shaped block. A plurality of sliding holes are provided. The plurality of sliding holes are formed at the two side ends of the U-shaped block, and the plurality of sliding holes are all communicated with the inner wall of the U-shaped block. A plurality of sliding rods are provided. The plurality of sliding rods are movably inserted between the inner walls of the plurality of sliding holes, and the plurality of sliding rods are all connected to the fixed clamping block. The third electric push rod is fixedly connected to the side end of the U-shaped block. The output end of the third electric push rod extends to the inner wall of the U-shaped block, and the output end of the third electric push rod is connected to the fixed clamping block.

[0014] As a preferred embodiment of the present invention, an infrared locator is fixedly connected to the bottom of the slider, a fixing frame is fixedly connected to the top of the U-shaped block, and a camera is fixedly connected to the side end of the fixing frame.

[0015] As a preferred embodiment of the present invention, a gyroscope is fixedly connected to the inner wall of the receiving groove.

[0016] A method for welding steel pipes in a chilled water machine room includes the following steps: S1. Pipe fitting clamping: Move the entire steel pipe welding device for the chilled water machine room to one side of the steel pipe to be welded, then lock the three universal wheels. The fixed clamping block is located between the inner walls of the counterweight V-shaped block, and the first electric push rod is energized and started. The output end of the first electric push rod contracts, and the output end of the first electric push rod presses down the transfer rod. The transfer rod is lifted between the inner walls of the receiving groove, and the un-welded steel pipe is placed in the V-shaped groove at the top of the counterweight V-shaped block. Then the output end of the first electric push rod extends to lift the transfer rod, and the transfer rod drives the movable clamping block to press down in the receiving groove. The movable clamping block clamps the un-welded steel pipe by approaching the fixed clamping block, realizing pipe fitting clamping. S2. Lifting the pipe fitting: After the pipe fitting is clamped, the servo motor is energized and started. The output end of the servo motor drives the lead screw to rotate. The lead screw pushes the slider to move up and down between the inner walls of the support frame through the sliding fit with the slider. The slider drives the bearing and the rotating shaft to move up and down. The rotating shaft and the bearing drive the U-shaped block to move up and down. The U-shaped block drives the fixed clamping block to move up and down through the displacement component. The fixed clamping block drives the clamping component to move up and down. At the same time, the infrared locator measures the lifting height of the un-welded steel pipe in real time by emitting infrared laser to the partition board, and then lifts the un-welded steel pipe between the fixed clamping block and the movable clamping block, realizing pipe fitting lifting. S3. Pipe fitting deflection: After the pipe fitting is lifted, the second electric push rod is energized. The output end of the second electric push rod contracts to pull the pawl away from the sliding hole, releasing the rotation lock of the rotating shaft. The stepping motor is energized and started. The output end of the stepping motor drives the driving gear to rotate. The driving gear drives the driven gear to rotate through the meshing with the driven gear. The driven gear drives the rotating shaft to rotate. The rotating shaft and the U-shaped block drive the U-shaped block to rotate. The U-shaped block drives the fixed clamping block and the movable clamping block to deflect through the displacement component. At the same time, the camera detects the real-time distance between the un-welded steel pipe and the steel pipe to be welded through the built-in image position calculation program, providing data reference for the butt joint between the steel pipes, and then realizing pipe fitting deflection. S4. Fine adjustment butt joint: During the deflection of the pipe fitting, the third electric push rod is energized and started. The output end of the third electric push rod extends or contracts to drive the fixed clamping block and the movable clamping block to move, and then realizes short-distance fine adjustment of the steel pipe to be welded clamped by the fixed clamping block and the movable clamping block, avoiding the collision between the un-welded steel pipe and the steel pipe to be welded during the deflection of the pipe fitting, and realizing the fine adjustment butt joint of the pipe fitting. S5. Precise butt joint: During the deflection and fine-tuning docking of pipe fittings, every time the gyroscope detects that the un-welded steel pipe deflects by 5 degrees, the second electric push rod is powered on and started. The output end of the second electric push rod extends to push the pawl to engage with the ratchet, restricting the rotation of the rotating shaft. Then, the output end of the third electric push rod extends or shortens to push the fixed clamp block to move between the inner walls of the U-shaped block, so that one end of the un-welded steel pipe approaches or moves away from the steel pipe to be welded. At the same time, the camera detects in real time whether the un-welded steel pipe and the steel pipe to be welded are docked. Then, one end of the un-welded steel pipe is lifted or pressed down so that the distance between the un-welded steel pipe and the steel pipe to be welded is 0.1 cm, so as to reserve a welding space and realize the precise docking between the un-welded steel pipe and the steel pipe to be welded; S6. Release the clamping: After precise docking, the welder performs circumferential welding around the docking end of the un-welded steel pipe and the steel pipe to be welded to weld and fix the un-welded steel pipe and the steel pipe to be welded. Since the steel pipe welding device in the chilled water machine room supports the un-welded steel pipe, a support structure is built at the bottom of the un-welded steel pipe. Then, the first electric push rod is powered on and started. The output end of the first electric push rod expands and contracts to pull the adapter rod down, and the adapter rod drives the movable clamp block to lift up. The movable clamp block lifts away from the un-welded steel pipe, and the angle between the movable clamp block and the fixed clamp block is greater than 80 degrees. Then, the servo motor is powered on and started, and the lead screw moves the displacement component and the clamping component downward through the sliding cooperation with the slider to release the clamping of the pipe fitting.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. In this solution, when clamping a single un-welded steel pipe, the single un-welded steel pipe is placed in the top groove of the counterweight V-shaped block, and the single un-welded steel pipe is located on the top of the fixed clamp block. At this time, the first electric push rod is powered on and started. The output end of the first electric push rod extends to push the adapter rod to lift up, and the adapter rod pushes the movable clamp block to rotate in the receiving groove. The movable clamp block clamps and fixes the single un-welded steel pipe by approaching the fixed clamp block. When releasing the clamping of the single un-welded steel pipe, since the steel pipe welding device in the chilled water machine room supports the un-welded steel pipe, a support structure is built at the bottom of the un-welded steel pipe. Then, the first electric push rod is powered on and started. The output end of the first electric push rod expands and contracts to pull the adapter rod down, and the adapter rod drives the movable clamp block to lift up. The movable clamp block lifts away from the un-welded steel pipe, and the angle between the movable clamp block and the fixed clamp block is greater than 80 degrees. Then, the servo motor is powered on and started, and the lead screw moves the displacement component and the clamping component downward through the sliding cooperation with the slider to release the clamping of the pipe fitting, so as to flexibly clamp a single un-welded steel pipe in a narrow space, effectively reducing the docking difficulty between the un-welded steel pipe and the steel pipe to be welded, shortening the welding operation time between the steel pipes in the chilled water machine room, accelerating the welding operation, and then improving the welding operation efficiency.

[0018] 2. In this solution, when lifting a single unwelded steel pipe, the servo motor is powered on and started. The output end of the servo motor drives the lead screw to rotate. The lead screw pushes the slider to lift or lower through the sliding fit with the slider. The slider moves the single unwelded steel pipe up and down through the displacement component and the clamping component, so as to facilitate the height alignment of the unwelded steel pipe and the steel pipe to be welded, effectively lift the unwelded steel pipe in the cold water machine room with a narrow space, and reduce the welding difficulty of the steel pipe in the narrow space.

[0019] 3. In this solution, when deflecting a single unwelded steel pipe, the stepper motor is powered on and started. The stepper motor drives the driving gear to rotate. The driving gear drives the driven gear to rotate through the meshing with the driven gear. The driven gear drives the rotating shaft to rotate. The rotating shaft drives the displacement component, the clamping component and the fixed clamp block to rotate, and then deflects the single unwelded steel pipe, so that one end of the unwelded steel pipe can be adapted to the steel pipe to be welded. At the same time, the cold water machine room steel pipe welding device as a whole can be arranged on both sides or the welding end of the steel pipe to be welded. By moving the cold water machine room steel pipe welding device as a whole, precise docking can be carried out according to the actual pipeline route, so as to increase the practicability of the cold water machine room steel pipe welding device.

[0020] 4. In this solution, when deflecting a single unwelded steel pipe, when the single unwelded steel pipe deflects to the required angle, the second electric push rod is powered on and started. The output end of the second electric push rod extends to push the pawl to engage with the ratchet. The pawl restricts the rotation of the rotating shaft through the engagement with the ratchet, so that the deflection angle of the single unwelded steel pipe is locked, and then a required pipeline route is formed between the inclined unwelded steel pipe and the steel pipe to be welded, so that the cold water machine room steel pipe welding device can meet the welding requirements of complex pipeline arrangements.

[0021] 5. In this solution, when docking between the unwelded steel pipe and the steel pipe to be welded, every time the gyroscope detects that the unwelded steel pipe deflects 5 degrees, the second electric push rod is powered on and started. The output end of the second electric push rod extends to push the pawl to engage with the ratchet, restricting the rotation of the rotating shaft. Then, the output end of the third electric push rod extends or shortens to push the fixed clamp block to move between the inner walls of the U-shaped block, so that one end of the unwelded steel pipe approaches or moves away from the steel pipe to be welded. At the same time, the camera detects in real time whether the unwelded steel pipe and the steel pipe to be welded are docked, and then lifts or presses one end of the unwelded steel pipe, so that the distance between the unwelded steel pipe and the steel pipe to be welded is 0.1 cm, so as to reserve a welding space, realize the precise docking between the unwelded steel pipe and the steel pipe to be welded, and avoid the collision damage between the unwelded steel pipe and the steel pipe to be welded. Description of the Drawings

[0022] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings: Figure 1 This is the first - perspective three - dimensional view of a steel pipe welding device for a chilled water machine room in the present invention; Figure 2 This is the second - perspective three - dimensional view of a steel pipe welding device for a chilled water machine room in the present invention; Figure 3 This is the first full - sectional view of a steel pipe welding device for a chilled water machine room in the present invention; Figure 4 This is the second full - sectional view of a steel pipe welding device for a chilled water machine room in the present invention; Figure 5 This is the three - dimensional view of the adjusting mechanism of a steel pipe welding device for a chilled water machine room in the present invention; Figure 6 This is the first full - sectional view of the adjusting mechanism of a steel pipe welding device for a chilled water machine room in the present invention; Figure 7 This is the second full - sectional view of the adjusting mechanism of a steel pipe welding device for a chilled water machine room in the present invention; Figure 8 This is the third full - sectional view of the adjusting mechanism of a steel pipe welding device for a chilled water machine room in the present invention; Figure 9 This is the first - perspective exploded view of the adjusting mechanism of a steel pipe welding device for a chilled water machine room in the present invention; Figure 10 This is the second - perspective exploded view of the adjusting mechanism of a steel pipe welding device for a chilled water machine room in the present invention.

[0023] In the figure: 1, base plate; 2, support frame; 3, counterweight V - shaped block; 4, fixed clamping block; 5, movable clamping block; 6, receiving groove; 7, transfer rod; 8, first electric push rod; 9, U - shaped block; 10, bearing; 11, slider; 12, rotating shaft; 13, driven gear; 14, driving gear; 15, stepping motor; 16, partition board; 17, limiting groove; 18, limiting block; 19, lead screw; 20, ratchet cover; 21, ratchet; 22, ratchet pawl; 23, second electric push rod; 24, sliding hole; 25, sliding rod; 26, third electric push rod; 27, gear cover; 28, fixing frame; 29, camera; 30, servo motor; 32, universal wheel; 33, infrared locator; 34, gyroscope. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment 1 Refer to Figure 1 -Figure 10 , a steel pipe welding device for a chilled water machine room, comprising: A bottom plate 1; A counterweight V-shaped block 3, the counterweight V-shaped block 3 is fixedly connected to the top of the bottom plate 1, and a fixed clamping block 4 is arranged between the inner walls of the counterweight V-shaped block 3; and An adjusting mechanism, the adjusting mechanism is arranged on the top of the bottom plate 1, and the adjusting mechanism is connected to the fixed clamping block 4 for moving the fixed clamping block 4.

[0026] In the present invention, universal wheels 32 are installed at the bottom triangles of the bottom plate 1 to support the overall movement of the steel pipe welding device for the chilled water machine room. The bottom plate 1 is used to support the fixed counterweight V-shaped block 3 and the support frame 2. The counterweight V-shaped block 3 is used to accommodate the fixed clamping block 4. At the same time, the counterweight V-shaped block 3 is used to balance the overall steel pipe welding device for the chilled water machine room, and the counterweight V-shaped block 3 is used to assist in supporting the un-welded steel pipe. The fixed clamping block 4 is used to lift the un-welded steel pipe. The adjusting mechanism is connected to the fixed clamping block 4 for moving the fixed clamping block 4.

[0027] The adjusting mechanism includes a lifting component, a rotating component, a limiting component, a clamping component and a displacement component. The clamping component is arranged on the upper side of the bottom plate 1, and the clamping component is connected to the fixed clamping block 4. The lifting component is arranged on the top of the bottom plate 1, and the lifting component is located on one side of the counterweight V-shaped block 3. The displacement component is arranged on one side of the lifting component, and the displacement component is connected to the clamping component. The rotating component is arranged on the other side of the lifting component, and the rotating component is connected to the displacement component. The limiting component is arranged at the side end of the lifting component, and the limiting component is connected to the driving component.

[0028] In the present invention, the clamping component is used to clamp and fix a single un-welded steel pipe. The lifting component is used to lift or lower a single un-welded steel pipe. The displacement component is used to perform precise horizontal displacement on a single un-welded steel pipe. The rotating component is used to deflect the angle of a single un-welded steel pipe. The limiting component is used to limit the deflection angle of a single un-welded steel pipe.

[0029] The lifting assembly includes a support frame 2, a slider 11, a partition plate 16, a limit groove 17, a limit block 18, a lead screw 19, and a servo motor 30. The support frame 2 is fixedly connected to the top of the bottom plate 1. The partition plate 16 is fixedly connected between the inner walls of the support frame 2. The lead screw 19 is rotatably connected between the inner walls of the support frame 2, and one end of the lead screw 19 extends to the bottom of the partition plate 16. The servo motor 30 is fixedly connected to the top of the bottom plate 1. The servo motor 30 is located between the inner walls of the support frame 2, and the output end of the servo motor 30 is fixedly connected to the extended end of the lead screw 19. The slider 11 is sleeved on the circumferential surface of the lead screw 19. The slider 11 is located between the inner walls of the support frame 2, and the slider 11 is located above the partition plate 16. There are two limit grooves 17. The two limit grooves 17 are opened at the two side ends of the support frame 2. The two limit grooves 17 are both communicated with the inner wall of the support frame 2. There are two limit blocks 18. The two limit blocks 18 slide between the inner walls of the two limit grooves 17, and the two limit blocks 18 are both communicated with the slider 11.

[0030] In the present invention, the support frame 2 is used to accommodate the slider 11, the partition plate 16, the lead screw 19, and the servo motor 30. The partition plate 16 is used to separate the slider 11 from the servo motor 30. The lead screw 19 pushes the slider 11 to lift through the sliding fit with the slider 11. The servo motor 30 is used to drive the lead screw 19 to rotate. The slider 11 is used to support and connect the rotating shaft 12, the U-shaped block 9, the infrared locator 33, and the two limit blocks 18. The two limit grooves 17 are used to accommodate the sliding of the two limit blocks 18. The two limit blocks 18 limit and guide the lifting of the slider 11 through the sliding fit with the two limit grooves 17, so as to limit the extreme height range of a single un-welded steel pipe. When lifting a single un-welded steel pipe, the servo motor 30 is powered on and started. The output end of the servo motor 30 drives the lead screw 19 to rotate. The lead screw 19 pushes the slider 11 to lift through the sliding fit with the slider 11. The slider 11 moves the single un-welded steel pipe up and down through the displacement assembly and the clamping assembly, so as to facilitate the height alignment of the un-welded steel pipe and the steel pipe to be welded, effectively lift the un-welded steel pipe in the cold water machine room with a narrow space, and reduce the welding difficulty of the steel pipe in the narrow space.

[0031] The clamping assembly includes a movable clamping block 5, a receiving groove 6, a transfer rod 7, and a first electric push rod 8. The receiving groove 6 is opened at the side end of the fixed clamping block 4. The movable clamping block 5 is rotatably connected between the inner walls of the receiving groove 6. The transfer rod 7 is fixedly connected to the top of the transfer rod 7, and the transfer rod 7 is located between the inner walls of the receiving groove 6. The first electric push rod 8 is rotatably connected between the inner walls of the receiving groove 6. The output end of the first electric push rod 8 is rotatably connected to the transfer rod 7.

[0032] In the present invention, the receiving groove 6 is used to receive the movable clamping block 5, the transfer rod 7 and the first electric push rod 8. One end of the movable clamping block 5 can be inserted between the inner walls of the fixed clamping block 4. The movable clamping block 5 approaches the fixed clamping block 4 by rotation to clamp and fix a single un-welded steel pipe. The transfer rod 7 is used to push the movable clamping block 5 to rotate, and the first electric push rod 8 is used to push the transfer rod 7 to deflect. When clamping a single un-welded steel pipe, the single un-welded steel pipe is placed in the top groove of the counterweight V-shaped block 3, and the single un-welded steel pipe is located at the top of the fixed clamping block 4. At this time, the first electric push rod 8 is powered on and started. The output end of the first electric push rod 8 extends to push the transfer rod 7 to lift. The transfer rod 7 pushes the movable clamping block 5 to rotate in the receiving groove 6. The movable clamping block 5 approaches the fixed clamping block 4 to clamp and fix the single un-welded steel pipe. When releasing the clamping of the single un-welded steel pipe, since the steel pipe welding device in the chilled water machine room supports the un-welded steel pipe, a support structure is built at the bottom of the un-welded steel pipe. Then the first electric push rod 8 is powered on and started. The output end of the first electric push rod 8 expands and contracts to pull the transfer rod 7 to press down. The transfer rod 7 drives the movable clamping block 5 to lift. The movable clamping block 5 lifts away from the un-welded steel pipe, and the included angle between the movable clamping block 5 and the fixed clamping block 4 is greater than 80 degrees. Then the servo motor 30 is powered on and started. The lead screw 19 moves the displacement assembly and the clamping assembly through the sliding cooperation with the slider 11 to release the clamping of the pipe fitting, flexibly clamp a single un-welded steel pipe in a narrow space, effectively reduce the docking difficulty between the un-welded steel pipe and the steel pipe to be welded, shorten the welding operation time between the steel pipes in the chilled water machine room, speed up the welding operation, and then improve the welding operation efficiency.

[0033] The rotating assembly includes a rotating shaft 12, a driven gear 13, a driving gear 14, a stepping motor 15 and a gear cover 27. The gear cover 27 is fixedly connected to the side end of the slider 11. The rotating shaft 12 is rotatably connected to one side of the slider 11. One end of the rotating shaft 12 penetrates through the slider 11, and one end of the rotating shaft 12 extends to the side end of the gear cover 27. The driven gear 13 is fixedly connected to the circumferential surface of the rotating shaft 12, and the driven gear 13 is located between the inner walls of the gear cover 27. The stepping motor 15 is fixedly connected to the side end of the gear cover 27, and the output end of the stepping motor 15 movably penetrates to the inner wall of the gear cover 27. The driving gear 14 is fixedly connected to the output end of the stepping motor 15. The driving gear 14 is located between the inner walls of the gear cover 27, and the driving gear 14 meshes with the driven gear 13.

[0034] In the present invention, the gear cover 27 is used to accommodate the driven gear 13 and the driving gear 14, and the gear cover 27 is used to support and fix the stepping motor 15 and the ratchet cover 20. The rotating shaft 12 is used to support and fix the driven gear 13 and the U-shaped block 9. The driven gear 13 is used to drive the rotating shaft 12 to rotate. The stepping motor 15 is used to drive the driving gear 14 to rotate. The driving gear 14 drives the driven gear 13 to rotate through meshing with the driven gear 13. When deflecting a single unwelded steel pipe, the stepping motor 15 is powered on and started. The stepping motor 15 drives the driving gear 14 to rotate. The driving gear 14 drives the driven gear 13 to rotate through meshing with the driven gear 13. The driven gear 13 drives the rotating shaft 12 to rotate. The rotating shaft 12 drives the displacement assembly, the clamping assembly, and the fixed clamp block 4 to rotate, thereby deflecting the single unwelded steel pipe so that one end of the unwelded steel pipe can be adapted to the steel pipe to be welded. At the same time, the whole cold water machine room steel pipe welding device can be arranged on both sides of the steel pipe to be welded or at the welding end. By moving the whole cold water machine room steel pipe welding device, precise docking can be carried out according to the actual pipeline route, so as to increase the practicality of the cold water machine room steel pipe welding device.

[0035] The limiting assembly includes a ratchet cover 20, a ratchet 21, a pawl 22, and a second electric push rod 23. The ratchet cover 20 is sleeved on one end of the rotating shaft 12, and the ratchet cover 20 is fixedly connected to the side end of the gear cover 27. The ratchet 21 is fixedly connected to the extended end of the rotating shaft 12, and the ratchet 21 is located between the inner walls of the ratchet cover 20. The pawl 22 is rotatably connected between the inner walls of the ratchet cover 20, and the ratchet cover 20 is engaged with the ratchet 21. The second electric push rod 23 is fixedly connected to the side end of the ratchet cover 20, and the output end of the second electric push rod 23 is rotatably connected to the pawl 22.

[0036] In the present invention, the ratchet cover 20 is used to accommodate the ratchet 21 and the pawl 22. The ratchet 21 is used to rotate synchronously with the rotating shaft 12. The pawl 22 restricts the rotation of the rotating shaft 12 through engagement with the ratchet 21. The second electric push rod 23 is used to push and pull the pawl 22. When deflecting a single unwelded steel pipe, when the single unwelded steel pipe deflects to the required angle, the second electric push rod 23 is powered on and started. The output end of the second electric push rod 23 extends to push the pawl 22 to engage with the ratchet 21. The pawl 22 restricts the rotation of the rotating shaft 12 through engagement with the ratchet 21, so that the deflection angle of the single unwelded steel pipe is locked, thereby forming the required pipeline route between the inclined unwelded steel pipe and the steel pipe to be welded, and enabling the cold water machine room steel pipe welding device to adapt to the welding requirements of complex pipeline arrangements.

[0037] The displacement component includes a U-shaped block 9, a sliding hole 24, a sliding rod 25, a third electric push rod 26 and a bearing 10. The U-shaped block 9 is sleeved on one end of the fixed clamping block 4, and the U-shaped block 9 is fixedly connected to the rotating shaft 12. The bearing 10 is fixedly connected between the slider 11 and the U-shaped block 9. A plurality of sliding holes 24 are provided, and the plurality of sliding holes 24 are opened on two side ends of the U-shaped block 9, and the plurality of sliding holes 24 are all communicated with the inner wall of the U-shaped block 9. A plurality of sliding rods 25 are provided, and the plurality of sliding rods 25 are movably inserted between the inner walls of the plurality of sliding holes 24, and the plurality of sliding rods 25 are all connected to the fixed clamping block 4. The third electric push rod 26 is fixedly connected to the side end of the U-shaped block 9, and the output end of the third electric push rod 26 extends between the inner walls of the U-shaped block 9, and the output end of the third electric push rod 26 is connected to the fixed clamping block 4.

[0038] In the present invention, the U-shaped block 9 is used to accommodate the fixed clamping block 4, the bearing 10 is used to assist in supporting the U-shaped block 9, the plurality of sliding holes 24 are used to accommodate the movable insertion of the plurality of sliding rods 25, and the plurality of sliding rods 25 support the receiving groove 6 through the movable insertion with the plurality of sliding holes 24. The third electric push rod 26 is used to push and pull the fixed clamping block 4, and then realize the fine adjustment movement of the clamping component and the fixed clamping block 4. When docking between the un-welded steel pipe and the steel pipe to be welded, every time the gyroscope 34 detects that the un-welded steel pipe deflects 5 degrees, the second electric push rod 23 is powered on and started. The output end of the second electric push rod 23 extends to push the pawl 22 to engage with the ratchet 21, restricting the rotation of the rotating shaft 12. Then, the output end of the third electric push rod 26 extends or shortens to push the fixed clamping block 4 to move between the inner walls of the U-shaped block 9, so that one end of the un-welded steel pipe approaches or moves away from the steel pipe to be welded. At the same time, the camera 29 monitors in real time whether the un-welded steel pipe and the steel pipe to be welded are docked, and then lifts or presses one end of the un-welded steel pipe, so that the distance between the un-welded steel pipe and the steel pipe to be welded is 0.1 cm, for reserving a welding space, realizing the precise docking between the un-welded steel pipe and the steel pipe to be welded, and avoiding the collision damage between the un-welded steel pipe and the steel pipe to be welded.

[0039] An infrared locator 33 is fixedly connected to the bottom of the slider 11, a fixed frame 28 is fixedly connected to the top of the U-shaped block 9, and a camera 29 is fixedly connected to the side end of the fixed frame 28.

[0040] In the present invention, the infrared locator 33 is used to detect the position distance between the slider 11 and the partition 16 in real time, and then calculate the height of the un-welded steel pipe from the ground, providing height parameters for the movement of the un-welded steel pipe. The fixed frame 28 is used to support and fix the camera 29, and the camera 29 is used to synchronously deflect to achieve real-time monitoring of the precise distance between the un-welded steel pipe and the steel pipe to be welded and provide an image reference.

[0041] A gyroscope 34 is fixedly connected to the inner wall of the receiving groove 6.

[0042] In the present invention, the gyroscope 34 moves synchronously with the fixed clamping block 4 to detect the inclination angle of the un-welded steel pipe in real time, providing the inclination angle parameter for the inclination of the un-welded steel pipe.

[0043] A steel pipe welding method for a chilled water machine room includes the following steps: S1. Pipe fitting clamping: Move the whole steel pipe welding device for the chilled water machine room to one side of the steel pipe to be welded, then lock the three universal wheels 32. The fixed clamping block 4 is located between the inner walls of the counterweight V-shaped block 3. Then, power on and start the first electric push rod 8. The output end of the first electric push rod 8 contracts, and the output end of the first electric push rod 8 presses down the transfer rod 7. The transfer rod 7 is lifted between the inner walls of the receiving groove 6. Place the un-welded steel pipe in the V-shaped groove at the top of the counterweight V-shaped block 3. Then, the output end of the first electric push rod 8 extends to lift the transfer rod 7. The transfer rod 7 drives the movable clamping block 5 to press down in the receiving groove 6. The movable clamping block 5 clamps the un-welded steel pipe by approaching the fixed clamping block 4, realizing pipe fitting clamping. S2. Lifting the pipe fitting: After the pipe fitting is clamped, power on and start the servo motor 30. The output end of the servo motor 30 drives the lead screw 19 to rotate. The lead screw 19 pushes the slider 11 to move up and down between the inner walls of the support frame 2 through the sliding fit with the slider 11. The slider 11 drives the bearing 10 and the rotating shaft 12 to move up and down. The rotating shaft 12 and the bearing 10 drive the U-shaped block 9 to move up and down. The U-shaped block 9 drives the fixed clamping block 4 to move up and down through the displacement component. The fixed clamping block 4 drives the clamping component to move up and down. At the same time, the infrared locator 33 measures the lifting height of the un-welded steel pipe in real time by emitting infrared laser to the partition plate 16, and then lifts the un-welded steel pipe between the fixed clamping block 4 and the movable clamping block 5, realizing pipe fitting lifting. S3. Pipe fitting deflection: After the pipe fitting is lifted, power on the second electric push rod 23. The output end of the second electric push rod 23 contracts to pull the pawl 22 away from the sliding hole 24, releasing the rotation lock of the rotating shaft 12. Power on and start the stepping motor 15. The output end of the stepping motor 15 drives the driving gear 14 to rotate. The driving gear 14 drives the driven gear 13 to rotate through the meshing with the driven gear 13. The driven gear 13 drives the rotating shaft 12 to rotate. The rotating shaft 12 and the U-shaped block 9 drive the U-shaped block 9 to rotate. The U-shaped block 9 drives the fixed clamping block 4 and the movable clamping block 5 to deflect through the displacement component. At the same time, the camera 29 detects the real-time distance between the un-welded steel pipe and the steel pipe to be welded through the built-in image position calculation program, providing data reference for the butt joint between the steel pipes, and then realizing pipe fitting deflection. S4. Fine adjustment butt joint: During the deflection of the pipe fitting, the third electric push rod 26 is powered on and started. The extension or contraction of the output end of the third electric push rod 26 drives the fixed clamping block 4 and the movable clamping block 5 to move, thereby realizing a short-distance fine adjustment of the steel pipe to be welded clamped by the fixed clamping block 4 and the movable clamping block 5, avoiding the collision between the non-welded steel pipe and the steel pipe to be welded during the deflection of the pipe fitting, and realizing the fine adjustment docking of the pipe fitting; S5. Precise docking: During the deflection and fine adjustment docking of the pipe fitting, every time the gyroscope 34 detects that the non-welded steel pipe deflects by 5 degrees, the second electric push rod 23 is powered on and started. The output end of the second electric push rod 23 extends to push the pawl 22 to engage with the ratchet wheel 21, restricting the rotation of the rotating shaft 12. Then, the output end of the third electric push rod 26 extends or shortens to push the fixed clamping block 4 to move between the inner walls of the U-shaped block 9, so that one end of the non-welded steel pipe approaches or moves away from the steel pipe to be welded. At the same time, the camera 29 monitors in real time whether the non-welded steel pipe and the steel pipe to be welded are docked, and then lifts or presses one end of the non-welded steel pipe so that the distance between the non-welded steel pipe and the steel pipe to be welded is 0.1 cm, so as to reserve a welding space and realize the precise docking between the non-welded steel pipe and the steel pipe to be welded; S6. Release clamping: After precise docking, the welder performs circumferential welding around the docking end of the non-welded steel pipe and the steel pipe to be welded to weld and fix the non-welded steel pipe and the steel pipe to be welded. Since the steel pipe welding device in the chilled water machine room supports the non-welded steel pipe and builds a support structure at the bottom of the non-welded steel pipe, then the first electric push rod 8 is powered on and started. The output end of the first electric push rod 8 expands and contracts to pull the adapter rod 7 to press down, and the adapter rod 7 drives the movable clamping block 5 to lift up. The movable clamping block 5 lifts away from the non-welded steel pipe, and the angle between the movable clamping block 5 and the fixed clamping block 4 is greater than 80 degrees. Then the servo motor 30 is powered on and started, and the lead screw 19 moves the displacement component and the clamping component downward through the sliding cooperation with the slider 11 to realize the release of the clamping of the pipe fitting.

[0044] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A steel pipe welding device for a chilled water machine room, characterized in that, Comprising; Bottom plate (1); Counterweight V-block (3), the counterweight V-block (3) is fixedly connected to the top of the bottom plate (1), and a fixed clamp block (4) is arranged between the inner walls of the counterweight V-block (3); and Adjusting mechanism, the adjusting mechanism is arranged on the top of the bottom plate (1), and the adjusting mechanism is connected to the fixed clamp block (4) for moving the fixed clamp block (4).

2. The steel pipe welding device for a chilled water machine room according to claim 1, wherein The adjusting mechanism includes a lifting component, a rotating component, a limiting component, a clamping component and a displacement component. The clamping component is arranged on the upper side of the bottom plate (1), and the clamping component is connected to the fixed clamp block (4). The lifting component is arranged on the top of the bottom plate (1), the lifting component is located on one side of the counterweight V-block (3), the displacement component is arranged on one side of the lifting component, the displacement component is connected to the clamping component, the rotating component is arranged on the other side of the lifting component, the rotating component is connected to the displacement component, the limiting component is arranged on the side end of the lifting component, and the limiting component is connected to the driving component.

3. The steel pipe welding device for a chilled water machine room according to claim 2, wherein The lifting component includes a support frame (2), a slider (11), a partition plate (16), a limiting groove (17), a limiting block (18), a lead screw (19) and a servo motor (30). The support frame (2) is fixedly connected to the top of the bottom plate (1). The partition plate (16) is fixedly connected between the inner walls of the support frame (2). The partition plate (16) is fixedly connected between the inner walls of the support frame (2). The lead screw (19) is rotatably connected between the inner walls of the support frame (2), and one end of the lead screw (19) extends to the bottom of the partition plate (16). The servo motor (30) is fixedly connected to the top of the bottom plate (1). The servo motor (30) is located between the inner walls of the support frame (2), and the output end of the servo motor (30) is fixedly connected to the extended end of the lead screw (19). The slider (11) is sleeved on the circumferential surface of the lead screw (19). The slider (11) is located between the inner walls of the support frame (2), and the slider (11) is located above the partition plate (16). There are two limiting grooves (17). The two limiting grooves (17) are opened at the two side ends of the support frame (2). The two limiting grooves (17) are both communicated with the inner wall of the support frame (2). There are two limiting blocks (18). The two limiting blocks (18) slide between the inner walls of the two limiting grooves (17), and the two limiting blocks (18) are both communicated with the slider (11).

4. The steel pipe welding device for a chilled water machine room according to claim 3, characterized in that, The clamping component includes a movable clamp block (5), a receiving groove (6), a transfer rod (7) and a first electric push rod (8). The receiving groove (6) is opened at the side end of the fixed clamp block (4). The movable clamp block (5) is rotatably connected between the inner walls of the receiving groove (6). The transfer rod (7) is fixedly connected to the top of the transfer rod (7), and the transfer rod (7) is located between the inner walls of the receiving groove (6). The first electric push rod (8) is rotatably connected between the inner walls of the receiving groove (6). The output end of the first electric push rod (8) is rotatably connected to the transfer rod (7).

5. The steel pipe welding device for a chilled water machine room according to claim 4, characterized in that, The rotating assembly includes a rotating shaft (12), a driven gear (13), a driving gear (14), a stepper motor (15) and a gear cover (27). The gear cover (27) is fixedly connected to the side end of the slider (11). The rotating shaft (12) is rotatably connected to one side of the slider (11). One end of the rotating shaft (12) penetrates through the slider (11), and one end of the rotating shaft (12) extends to the side end of the gear cover (27). The driven gear (13) is fixedly connected to the circumferential surface of the rotating shaft (12), and the driven gear (13) is located between the inner walls of the gear cover (27). The stepper motor (15) is fixedly connected to the side end of the gear cover (27), and the output end of the stepper motor (15) movably penetrates to between the inner walls of the gear cover (27). The driving gear (14) is fixedly connected to the output end of the stepper motor (15). The driving gear (14) is located between the inner walls of the gear cover (27), and the driving gear (14) meshes with the driven gear (13).

6. The steel pipe welding device for a chilled water machine room according to claim 5, characterized in that, The limiting assembly includes a ratchet cover (20), a ratchet (21), a ratchet pawl (22) and a second electric push rod (23). The ratchet cover (20) is sleeved on one end of the rotating shaft (12), and the ratchet cover (20) is fixedly connected to the side end of the gear cover (27). The ratchet (21) is fixedly connected to the extended end of the rotating shaft (12), and the ratchet (21) is located between the inner walls of the ratchet cover (20). The ratchet pawl (22) is rotatably connected between the inner walls of the ratchet cover (20), and the ratchet cover (20) engages with the ratchet (21). The second electric push rod (23) is fixedly connected to the side end of the ratchet cover (20), and the output end of the second electric push rod (23) is rotatably connected to the ratchet pawl (22).

7. The steel pipe welding device for a chilled water machine room according to claim 6, characterized in that, The displacement assembly includes a U-shaped block (9), a sliding hole (24), a sliding rod (25), a third electric push rod (26) and a bearing (10). The U-shaped block (9) is sleeved on one end of the fixed clamping block (4), and the U-shaped block (9) is fixedly connected to the rotating shaft (12). The bearing (10) is fixedly connected between the slider (11) and the U-shaped block (9). A plurality of sliding holes (24) are provided. The plurality of sliding holes (24) are opened at both side ends of the U-shaped block (9), and the plurality of sliding holes (24) are all communicated with the inner wall of the U-shaped block (9). A plurality of sliding rods (25) are provided. The plurality of sliding rods (25) are movably inserted between the inner walls of the plurality of sliding holes (24), and the plurality of sliding rods (25) are all connected to the fixed clamping block (4). The third electric push rod (26) is fixedly connected to the side end of the U-shaped block (9). The output end of the third electric push rod (26) extends to between the inner walls of the U-shaped block (9), and the output end of the third electric push rod (26) is connected to the fixed clamping block (4).

8. A steel pipe welding device for a chilled water machine room according to claim 7, characterized in that, An infrared locator (33) is fixedly connected to the bottom of the slider (11). A fixing frame (28) is fixedly connected to the top of the U-shaped block (9). A camera (29) is fixedly connected to the side end of the fixing frame (28).

9. The steel pipe welding device for a chilled water machine room according to claim 8, characterized in that, The inner wall of the receiving groove (6) is fixedly connected with a gyroscope (34).

10. A steel pipe welding method for a chilled water machine room, characterized in that, Applying a steel pipe welding device for a chilled water machine room according to claim 9, comprising the following steps: S1. Pipe fitting clamping: Move the whole steel pipe welding device for the chilled water machine room to one side of the steel pipe to be welded, and then lock the three universal wheels (32). The fixed clamping block (4) is located between the inner walls of the counterweight V-shaped block (3). Then, power on and start the first electric push rod (8). The output end of the first electric push rod (8) contracts, and the output end of the first electric push rod (8) presses down the transfer rod (7). The transfer rod (7) is lifted between the inner walls of the receiving groove (6). Place the un-welded steel pipe on the V-shaped groove at the top of the counterweight V-shaped block (3). Then, the output end of the first electric push rod (8) extends to lift the transfer rod (7). The transfer rod (7) drives the movable clamping block (5) to press down in the receiving groove (6). The movable clamping block (5) clamps the un-welded steel pipe by approaching the fixed clamping block (4), thus realizing pipe fitting clamping. S2. Lifting the pipe fitting: After the pipe fitting is clamped, power on and start the servo motor (30). The output end of the servo motor (30) drives the lead screw (19) to rotate. The lead screw (19) pushes the slider (11) to move up and down between the inner walls of the support frame (2) through the sliding fit with the slider (11). The slider (11) drives the bearing (10) and the rotating shaft (12) to move up and down. The rotating shaft (12) and the bearing (10) drive the U-shaped block (9) to move up and down. The U-shaped block (9) drives the fixed clamping block (4) to move up and down through the displacement component. The fixed clamping block (4) drives the clamping component to move up and down. At the same time, the infrared locator (33) measures the lifting height of the un-welded steel pipe in real time by emitting infrared laser to the partition plate (16), and then lifts the un-welded steel pipe between the fixed clamping block (4) and the movable clamping block (5), thus realizing the lifting of the pipe fitting. S3. Pipe fitting deflection: After the pipe fitting is lifted, power on the second electric push rod (23). The output end of the second electric push rod (23) contracts to pull the pawl (22) away from the sliding hole (24), releasing the rotation lock of the rotating shaft (12). Power on and start the stepping motor (15). The output end of the stepping motor (15) drives the driving gear (14) to rotate. The driving gear (14) drives the driven gear (13) to rotate through the meshing with the driven gear (13). The driven gear (13) drives the rotating shaft (12) to rotate. The rotating shaft (12) and the U-shaped block (9) drive the U-shaped block (9) to rotate. The U-shaped block (9) drives the fixed clamping block (4) and the movable clamping block (5) to deflect through the displacement component. At the same time, the camera (29) detects the real-time distance between the un-welded steel pipe and the steel pipe to be welded through the built-in image position calculation program, providing data reference for the butt joint between the steel pipes, and then realizing the deflection of the pipe fitting. S4. Fine adjustment butt joint: During the deflection of the pipe fitting, the third electric push rod (26) is powered on and started. The extension or contraction of the output end of the third electric push rod (26) drives the fixed clamp block (4) and the movable clamp block (5) to move, thereby realizing a short-distance fine adjustment of the steel pipe to be welded clamped by the fixed clamp block (4) and the movable clamp block (5), avoiding the collision between the non-welded steel pipe and the steel pipe to be welded during the deflection of the pipe fitting, and realizing the fine adjustment docking of the pipe fitting; S5. Precise docking: During the deflection and fine adjustment docking of the pipe fitting, every time the gyroscope (34) detects that the non-welded steel pipe deflects by 5 degrees, the second electric push rod (23) is powered on and started. The output end of the second electric push rod (23) extends to push the pawl (22) to engage with the ratchet wheel (21), restricting the rotation of the rotating shaft (12). Then, the output end of the third electric push rod (26) extends or shortens to push the fixed clamp block (4) to move between the inner walls of the U-shaped block (9), so that one end of the non-welded steel pipe approaches or moves away from the steel pipe to be welded. At the same time, the camera (29) monitors in real time whether the non-welded steel pipe and the steel pipe to be welded are docked, and then lifts or presses one end of the non-welded steel pipe so that the distance between the non-welded steel pipe and the steel pipe to be welded is 0.1 cm, so as to reserve a welding space and realize the precise docking between the non-welded steel pipe and the steel pipe to be welded; S6. Release the clamping: After the precise docking, the welder performs circumferential welding around the docking end of the non-welded steel pipe and the steel pipe to be welded to weld and fix the non-welded steel pipe and the steel pipe to be welded. Since the steel pipe welding device in the chilled water machine room supports the non-welded steel pipe and builds a support structure at the bottom of the non-welded steel pipe, then the first electric push rod (8) is powered on and started. The output end of the first electric push rod (8) stretches and pulls the adapter rod (7) to press down. The adapter rod (7) drives the movable clamp block (5) to lift up. The movable clamp block (5) lifts away from the non-welded steel pipe, and the angle between the movable clamp block (5) and the fixed clamp block (4) is greater than 80 degrees. Then, the servo motor (30) is powered on and started. The lead screw (19) moves the displacement component and the clamping component downward through the sliding fit with the slider (11) to realize the release of the clamping of the pipe fitting.

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