A seamless welding device and method for construction technology

Abstract

The present invention relates to the field of welding devices, and discloses a seamless welding device and method for building technology, which solves the problem that relative displacement may occur between a steel pipe and a clamping member when two steel pipes approach and press against each other. A workbench is provided with a welding mechanism and a steel pipe fixing mechanism at the top. The steel pipe fixing mechanism includes a main fixing member arranged in the middle of the top of the workbench and auxiliary fixing members symmetrically arranged on both sides of the main fixing member. Both the main fixing member and the auxiliary fixing member include an installation cylinder, and a rotation driving member for centering and clamping the steel pipe and rotating welding is arranged on the outer side of the installation cylinder. An end limiting mechanism is arranged at one end of the installation cylinder on the auxiliary fixing member away from the main fixing member. The present invention realizes centering clamping and fixing by installing the steel pipe in the corresponding installation cylinder, and limits the mutually separated ends of the two steel pipes at both ends through the end limiting mechanism, avoiding relative displacement between the steel pipe and the clamping member and improving the welding stability.

Description

Technical Field

[0001] The present invention belongs to the field of welding devices, and specifically relates to a seamless welding device and method for construction technology. Background Art

[0002] In the continuous development process of the construction industry, the complexity and functional requirements of building structures are increasing day by day. For many building metal components, such as steel beams, aluminum alloy door and window frames, etc., their connection quality directly affects the overall safety, stability and aesthetics of the building. Traditional welding technologies, such as manual arc welding, gas shielded welding, etc. In the construction industry, in many cases, multiple steel pipes need to be welded. For aesthetic needs, seamless welding is required. When performing seamless welding, generally, the steel pipes need to be horizontally clamped by clamping members, and the steel pipes need to be centered. Then, the two clamping members approach each other, so that the two clamping members drive the contact surfaces of adjacent two steel pipes to be pressed tightly, so as to perform seamless welding. However, there are still the following defects:

[0003] When the clamping members drive two steel pipes to approach each other and be pressed tightly, the two steel pipes are prone to relative displacement between the steel pipes and the clamping members under the mutual acting force, thereby causing a decrease in welding stability and affecting the quality of seamless welding. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a seamless welding device and method for construction technology, which effectively solves the problem that relative displacement may occur between the steel pipes and the clamping members when two steel pipes approach each other and are pressed tightly at present.

[0005] To achieve the above object, the present invention provides the following technical solutions: A seamless welding device and method for construction technology, including a workbench, and a welding mechanism and a steel pipe fixing mechanism are arranged at the top of the workbench;

[0006] The steel pipe fixing mechanism includes a main fixing member arranged in the middle of the top of the workbench and auxiliary fixing members symmetrically arranged on both sides of the main fixing member. Both the main fixing member and the auxiliary fixing members include mounting cylinders. A rotation driving member for centering and clamping the steel pipe and rotating for welding is arranged outside the mounting cylinder. An end limiting mechanism is arranged at one end of the mounting cylinder on the auxiliary fixing member away from the main fixing member;

[0007] The end limiting mechanism includes an end plate arranged at one end of the mounting cylinder on the auxiliary fixing member away from the main fixing member. A communication groove is opened in the middle of the end plate. An active pressing member for pressing the steel pipe is arranged on the end plate. An air inlet protection member for driving the pressing can be installed on the end plate. A clamping fixing member for fixing the air inlet protection member is arranged on the end plate;

[0008] The movable pressing member includes two semi-circular grooves symmetrically formed on the end plate. The semi-circular grooves are semi-circular in shape. A semi-circular plate is movably installed inside the semi-circular grooves. The outer wall of the semi-circular plate is in close contact with the inner wall of the semi-circular grooves. Limiting grooves are formed on one side of the two semi-circular grooves away from each other. Limiting blocks are installed on the semi-circular plate. The limiting blocks are slidably installed inside the limiting grooves. First springs are symmetrically installed on both sides of the limiting blocks. The ends of the first springs are fixedly connected to the inner walls of the limiting grooves. A limiting rotating ring is installed on one side of the end plate. The limiting rotating ring is rotatably installed inside the limiting ring groove. The limiting ring groove is formed at the end of the installation cylinder.

[0009] Preferably, the air intake protection member includes an installation cover installed on one side of the end plate. The end of the installation cover is in close contact with the surface of the end plate and the surface of the semi-circular plate. And the outer diameter of the installation cover is smaller than the outer diameter of the semi-circular plate. A connecting pipe is installed at one end of the installation cover. A valve is installed on the connecting pipe. Side blocks are symmetrically installed on both sides of the installation cover. A clamping groove is formed at the end of the side block. A positioning block is installed on one side of the side block close to the end plate.

[0010] Preferably, communication cavities are equiangularly formed inside the installation cover. An end groove is formed at one end of the communication cavity close to the end plate. A piston is movably installed inside the communication cavity. A pressing rod is installed on one side of the piston close to the end groove. The end of the pressing rod is in contact with the surface of the semi-circular plate. A second spring is installed on one side of the piston close to the end plate. The end of the second spring is fixedly connected to the inner wall of the end of the communication cavity. A side groove is formed at one end of the communication cavity away from the end groove. The side groove is communicated with the inner cavity of the installation cover.

[0011] Preferably, the clamping and fixing member includes moving grooves symmetrically formed on the end plate. Side grooves are symmetrically formed on both sides of the moving grooves. A moving block is slidably installed inside the moving grooves. Clamping blocks are symmetrically installed on both sides of the moving block. A third spring is installed on one side of the moving block away from the communication groove. One end of the third spring is fixedly connected to the inner wall of the end of the moving groove. A pull rod is installed on one side of the moving block. The pull rod penetrates to the outside of the end plate. Positioning grooves are symmetrically formed on both sides of the end plate.

[0012] Preferably, the rotation driving member includes two rotating frames. The installation cylinder is rotatably installed on the rotating frames. A first toothed ring is installed on the outer wall of the installation cylinder. A first gear is meshed and connected below the first toothed ring. The first gear is fixedly connected to the output shaft of the first motor. A bottom seat is arranged below the installation cylinder. The rotating frames and the first motor are both installed on the bottom seat. The bottom seat on the main fixing member is fixed on the workbench. A rotation adjusting member is arranged below the bottom seat on the sub-fixing member. A centering clamping member is installed on the installation cylinder.

[0013] Preferably, the centering clamping member includes clamping plates arranged at equal angles inside the mounting cylinder. A connecting frame is installed on the clamping plate. The connecting frame is slidably connected to the mounting cylinder. A connecting block is installed at the end of the connecting frame. Two moving rings are coaxially arranged outside the mounting cylinder. The two moving rings are symmetrically arranged on both sides of the connecting block. The two ends of the connecting block are symmetrically hinged with connecting rods. The end of the connecting rod is hinged to the moving ring. A sliding frame is installed on the bottom seat. Two sliding limit plates are slidably installed on the sliding frame. The two sliding limit plates are respectively in contact with the mutually remote sides of the two moving rings. A double-headed screw is rotatably installed on the inner wall of the sliding frame. The two sliding limit plates are respectively threadedly connected to two threaded grooves with opposite opening directions on the double-headed screw. One end of the double-headed screw is fixedly connected to the output shaft of the second motor. The second motor is fixedly installed on the sliding frame.

[0014] Preferably, the rotation adjustment member includes a sliding seat arranged below the bottom seat on the auxiliary fixing member. The top end of the sliding seat is rotatably installed with a rotating shaft. The rotating shaft is fixedly connected to the bottom seat. A second toothed ring is installed on the rotating shaft. One side of the second toothed ring is meshed with a second gear. The second gear is fixedly connected to the output shaft of the third motor. The third motor is fixedly installed on the sliding seat. A second lateral movement module for driving the sliding seat to move is arranged between the sliding seat and the workbench. The second lateral movement module is symmetrically arranged on the workbench.

[0015] Preferably, the welding mechanism includes welding bases symmetrically arranged on the workbench. An installation table is arranged above the welding base. A welding gun is installed at the top end of the installation table. A first lateral movement module is arranged between the welding base and the workbench. The first lateral movement module is symmetrically arranged on the workbench. A distance adjustment module is arranged between the welding base and the installation table. The welding height of the welding gun is the same as the height of the central axis of the mounting cylinder.

[0016] The present invention also provides a welding method for a seamless welding device for building technology, including the following steps:

[0017] S1. Steel pipe installation: Centering and installing the main steel pipe in the mounting cylinder on the main fixing member, and centering and installing the auxiliary steel pipe in the mounting cylinder on the auxiliary fixing member;

[0018] S2. Limiting and pressing: Limiting and pressing the long pipe composed of multiple steel pipes through the end plates at the ends of the mounting cylinders of the two auxiliary fixing members, and making the inner cavity of the long pipe communicate with the communication groove;

[0019] S3. Ventilation: Installing the installation cover on the side of the end plate away from the steel pipe, connecting one of the connecting pipes to the inert gas storage tank, and ventilating the inner cavity of the long pipe to discharge air;

[0020] S4. Welding: Move the welding gun to the position where seamless welding is required between two adjacent steel pipes, and turn on the first motor on the installation cylinder where the steel pipes are installed, so that the steel pipes rotate synchronously, and then perform welding with the welding gun.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] (1) In the present invention, the steel pipes can be coaxially fixed inside the installation cylinder, and one end of the auxiliary steel pipe is closely attached to the end plate at one end of the installation cylinder. At the same time, the installation cylinder on the auxiliary fixing member can rotate, so that the position of the end plate on the installation cylinder can be adjusted, so that the end plates on the two installation cylinders can press and limit the two ends of the long pipe composed of two or three steel pipes, avoiding the relative movement between the steel pipe and the clamping member, and improving the stability of seamless welding.

[0023] (2) In this invention, both sides of the moving block are equipped with clamping blocks, so that the installation cover can be installed on both sides of the end plate. After the installation cover is installed on the side of the end plate away from the main steel pipe, the inner cavity of the installation cover is communicated with the communication groove, and the communication groove is communicated with the inner cavity of the long pipe composed of multiple steel pipes, so that the inner cavity of the long pipe is communicated with the inner cavities of the two installation covers, which is convenient for introducing inert gas into the long pipe and discharging air to protect the steel pipe welding.

[0024] (3) When the two valves are opened in this invention, inert gas can be introduced and air can be discharged. When the valve at the end of discharging air is closed, the air pressure in the inner cavities of the two installation covers continuously increases, generating pressure on the piston, so that the end of the pressure rod generates pressure on the semi-circular plate towards the side of the main steel pipe, further pressing the multiple steel pipes, improving the welding stability, and at the same time, the pressing strength can be adjusted by the amount of inert gas introduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] In the drawings:

[0027] Figure 1 is a schematic structural diagram of the seamless welding device for building technology of the present invention;

[0028] Figure 2 is a schematic structural diagram of the steel pipe fixing mechanism of the present invention;

[0029] Figure 3 is a schematic structural diagram of the centering clamping member of the present invention;

[0030] Figure 4 is a schematic structural diagram of the rotation adjusting member of the present invention;

[0031] Figure 5Schematic diagram of the end limit mechanism of the present invention;

[0032] Figure 6 Schematic diagram of the movable pressing member of the present invention;

[0033] Figure 7 Schematic diagram of the clamping and fixing member of the present invention;

[0034] Figure 8 Schematic diagram of the air intake protection member of the present invention;

[0035] Figure 9 Schematic diagram of the internal structure of the installation cover of the present invention;

[0036] In the figure: 1, workbench; 2, welding mechanism; 201, welding base; 202, installation table; 203, welding gun; 204, first lateral movement module; 205, distance adjustment module; 3, steel pipe fixing mechanism; 3a, main fixing member; 3b, auxiliary fixing member; 301, second lateral movement module; 302, installation cylinder; 303, bottom seat; 304, rotating frame; 305, first toothed ring; 306, first gear; 307, first motor; 308, centering clamping member; 3081, clamping plate; 3082, connecting frame; 3083, connecting block; 3084, moving ring; 3085, connecting rod; 3086, sliding frame; 3087, sliding limit plate; 3088, double-headed screw; 3089, second motor; 309, rotating adjustment member; 3091, sliding seat; 3092, rotating shaft; 3093, second toothed ring; 3094, second gear; 3095, third motor; 4, end limit mechanism; 401, end plate; 402, limit ring groove; 403, limit rotating ring; 404, communication groove; 405, movable pressing member; 4051, semi-ring groove; 4052, semi-ring plate; 4053, limit groove; 4054, limit block; 4055, first spring; 406, air intake protection member; 4061, installation cover; 4062, connecting pipe; 4063, valve; 4064, side block; 4065, positioning block; 4066, card slot; 4067, communication cavity; 4068, end groove; 4069, side groove; 40610, piston; 40611, pressure rod; 40612, second spring; 407, clamping and fixing member; 4071, positioning groove; 4072, moving groove; 4073, side groove; 4074, moving block; 4075, card block; 4076, pull rod; 4077, third spring. Detailed implementation manner

[0037] 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment 1 is given by Figures 1-9 The present invention relates to a seamless welding device and method for building technology, including a workbench 1, and a welding mechanism 2 and a steel pipe fixing mechanism 3 are arranged at the top of the workbench 1;

[0039] The steel pipe fixing mechanism 3 includes a main fixing member 3a arranged in the middle of the top of the workbench 1 and auxiliary fixing members 3b symmetrically arranged on both sides of the main fixing member 3a. Both the main fixing member 3a and the auxiliary fixing members 3b include an installation cylinder 302. A rotation driving member for centering and clamping the steel pipe and rotating welding is arranged on the outer side of the installation cylinder 302. An end limiting mechanism 4 is arranged at one end of the installation cylinder 302 on the auxiliary fixing member 3b away from the main fixing member 3a;

[0040] The end limiting mechanism 4 includes an end plate 401 arranged at one end of the installation cylinder 302 on the auxiliary fixing member 3b away from the main fixing member 3a. The steel pipe can be coaxially fixed inside the installation cylinder 302, and one end of the auxiliary steel pipe is in close contact with the end plate 401 at one end of the installation cylinder 302. At the same time, the installation cylinder 302 on the auxiliary fixing member 3b can rotate, so that the position of the end plate 401 on the installation cylinder 302 can be adjusted, so that the end plates 401 on the two installation cylinders 302 can press and limit both ends of a long pipe composed of two or three steel pipes, improving the stability of seamless welding. A communication groove 404 is opened in the middle of the end plate 401. An active pressing member 405 for pressing the steel pipe is arranged on the end plate 401. An air inlet protection member 406 for driving the pressing can be installed on the end plate 401. A clamping and fixing member 407 for fixing the air inlet protection member 406 is arranged on the end plate 401. A limiting rotating ring 403 is installed on one side of the end plate 401. The limiting rotating ring 403 is rotatably installed inside a limiting ring groove 402, and the limiting ring groove 402 is opened at the end of the installation cylinder 302.

[0041] The movable pressing member 405 includes two semi-circular grooves 4051 symmetrically formed on the end plate 401. The semi-circular grooves 4051 are semi-circular in shape. A semi-circular plate 4052 is movably installed inside the semi-circular grooves 4051. The outer wall of the semi-circular plate 4052 is in close contact with the inner wall of the semi-circular grooves 4051. Limiting grooves 4053 are formed on one side of the two semi-circular grooves 4051 away from each other. A limiting block 4054 is installed on the semi-circular plate 4052. The limiting block 4054 is slidably installed inside the limiting groove 4053. First springs 4055 are symmetrically installed on both sides of the limiting block 4054. The ends of the first springs 4055 are fixedly connected to the inner wall of the limiting groove 4053.

[0042] The air intake protection member 406 includes a mounting cover 4061 installed on one side of the end plate 401. The end of the mounting cover 4061 is in close contact with the surface of the end plate 401 and the surface of the semi-circular plate 4052. And the outer diameter of the mounting cover 4061 is smaller than the outer diameter of the semi-circular plate 4052. A connecting pipe 4062 is installed at one end of the mounting cover 4061. A valve 4063 is installed on the connecting pipe 4062. Side blocks 4064 are symmetrically installed on both sides of the mounting cover 4061. A clamping groove 4066 is formed at the end of the side block 4064. A positioning block 4065 is installed on the side of the side block 4064 close to the end plate 401. Communication cavities 4067 are equiangularly formed inside the mounting cover 4061. An end groove 4068 is formed at one end of the communication cavity 4067 close to the end plate 401. A piston 40610 is movably installed inside the communication cavity 4067. A pressure rod 40611 is installed on the side of the piston 40610 close to the end groove 4068. The end of the pressure rod 40611 is in contact with the surface of the semi-circular plate 4052. A second spring 40612 is installed on the side of the piston 40610 close to the end plate 401. The end of the second spring 40612 is fixedly connected to the end inner wall of the communication cavity 4067. A side groove 4069 is formed at one end of the communication cavity 4067 away from the end groove 4068. The side groove 4069 communicates with the inner cavity of the mounting cover 4061. When the two valves 4063 are opened, inert gas can be introduced and air can be discharged. When the valve 4063 at the end where air is discharged is closed, the air pressure in the inner cavities of the two mounting covers 4061 continuously increases, generating pressure on the piston 40610, so that the end of the pressure rod 40611 generates pressure on the semi-circular plate 4052 toward the main steel pipe side, further pressing the multiple steel pipes to improve the welding stability. At the same time, the pressing strength can be adjusted by the amount of inert gas introduced.

[0043] The snap-fastening fixture 407 includes moving grooves 4072 symmetrically formed in the end plate 401. Side grooves 4073 are symmetrically formed on both sides of the moving groove 4072. A moving block 4074 is slidably installed inside the moving groove 4072. Clamping blocks 4075 are symmetrically installed on both sides of the moving block 4074. A third spring 4077 is installed on the side of the moving block 4074 away from the communication groove 404. One end of the third spring 4077 is fixedly connected to the inner wall of the end of the moving groove 4072. A pull rod 4076 is installed on one side of the moving block 4074. The pull rod 4076 penetrates to the outside of the end plate 401. Positioning grooves 4071 are symmetrically formed on both sides of the end plate 401. Clamping blocks 4075 are installed on both sides of the moving block 4074, enabling the mounting cover 4061 to be installed on both sides of the end plate 401. After the mounting cover 4061 is installed on the side of the end plate 401 away from the main steel pipe, the inner cavity of the mounting cover 4061 communicates with the communication groove 404, and the communication groove 404 communicates with the inner cavity of the long pipe composed of multiple steel pipes, enabling the inner cavity of the long pipe to communicate with the inner cavities of the two mounting covers 4061, facilitating the introduction of inert gas into the long pipe and the discharge of air to protect the steel pipe welding.

[0044] The rotation driving member includes two rotating frames 304. The mounting cylinder 302 is rotatably installed on the rotating frames 304. A first toothed ring 305 is installed on the outer wall of the mounting cylinder 302. A first gear 306 is meshed and connected below the first toothed ring 305. The first gear 306 is fixedly connected to the output shaft of the first motor 307. A bottom seat 303 is arranged below the mounting cylinder 302. The rotating frames 304 and the first motor 307 are both installed on the bottom seat 303. The bottom seat 303 on the main fixing member 3a is fixed on the workbench 1. A rotation adjusting member 309 is arranged below the bottom seat 303 of the sub-fixing member 3b. A centering clamping member 308 is installed on the mounting cylinder 302.

[0045] The centering clamp 308 includes clamping plates 3081 arranged at equal angles inside the mounting cylinder 302. A connecting frame 3082 is installed on the clamping plate 3081. The connecting frame 3082 is slidably connected to the mounting cylinder 302. A connecting block 3083 is installed at the end of the connecting frame 3082. Two moving rings 3084 are coaxially arranged outside the mounting cylinder 302. The two moving rings 3084 are symmetrically arranged on both sides of the connecting block 3083. Connecting rods 3085 are symmetrically hinged at both ends of the connecting block 3083. The ends of the connecting rods 3085 are hinged to the moving rings 3084. A sliding frame 3086 is installed on the bottom seat 303. Two sliding limit plates 3087 are slidably installed on the sliding frame 3086. The two sliding limit plates 3087 are respectively in contact with the mutually remote sides of the two moving rings 3084. A double-headed screw 3088 is rotatably installed on the inner wall of the sliding frame 3086. The two sliding limit plates 3087 are respectively threadedly connected to two thread grooves with opposite opening directions on the double-headed screw 3088. One end of the double-headed screw 3088 is fixedly connected to the output shaft of the second motor 3089. The second motor 3089 is fixedly installed on the sliding frame 3086.

[0046] The rotation adjustment member 309 includes a sliding seat 3091 arranged below the bottom seat 303 on the secondary fixing member 3b. A rotating shaft 3092 is rotatably installed at the top end of the sliding seat 3091. The rotating shaft 3092 is fixedly connected to the bottom seat 303. A second toothed ring 3093 is installed on the rotating shaft 3092. A second gear 3094 is meshed and connected to one side of the second toothed ring 3093. The second gear 3094 is fixedly connected to the output shaft of the third motor 3095. The third motor 3095 is fixedly installed on the sliding seat 3091. A second lateral movement module 301 for driving the sliding seat 3091 to move is arranged between the sliding seat 3091 and the workbench 1. The second lateral movement module 301 is symmetrically arranged on the workbench 1.

[0047] The welding mechanism 2 includes welding bases 201 symmetrically arranged on the workbench 1. An installation table 202 is arranged above the welding base 201. A welding gun 203 is installed at the top end of the installation table 202. A first lateral movement module 204 is arranged between the welding base 201 and the workbench 1. The first lateral movement module 204 is symmetrically arranged on the workbench 1. A distance adjustment module 205 is arranged between the welding base 201 and the installation table 202. The welding height of the welding gun 203 is the same as the central axis height of the mounting cylinder 302.

[0048] Working principle: When seamless welding is required at the ends of two steel pipes, insert the main steel pipe into the mounting cylinder 302 on the main fixture 3a, and then turn on the second motor 3089 to drive the double-headed screw 3088 to rotate, driving the two sliding limit plates 3087 to approach each other and squeeze the two moving rings 3084. When the two moving rings 3084 approach each other, the connecting rod 3085 is used to push each clamping plate 3081 to move equidistantly towards the main steel pipe to clamp and fix the main steel pipe. By the above method, install a secondary steel pipe into the mounting cylinder 302 on one of the secondary fixtures 3b, and make one end of the secondary steel pipe closely adhere to the end plate 401. Then, drive the secondary steel pipe towards the main steel pipe by the second lateral movement module 301, so that the secondary steel pipe is closely adhered to the end of the main steel pipe. Then, turn on the third motor 3095 on the other secondary fixture 3b to make the second gear 3094 rotate. Driven by the second toothed ring 3093, drive the mounting cylinder 302 on the other secondary fixture 3b to rotate, so that the end plate 401 on the mounting cylinder 302 faces the main steel pipe side. Then, drive this mounting cylinder 302 towards the main steel pipe by the second lateral movement module 301 until the end plate 401 is closely adhered to one end of the main steel pipe;

[0049] When seamless welding is required for three steel pipes, by the above method, install the main steel pipe in the mounting cylinder 302 on the main fixture 3a, and install the two secondary steel pipes in the mounting cylinders 302 on the two secondary fixtures 3b respectively. It is necessary to make the ends of the secondary steel pipes far from the main steel pipe closely adhere to the corresponding end plates 401. The outer diameter of the steel pipe should be smaller than the outer diameter of the semi-ring plate 4052, and the inner diameter of the steel pipe should be larger than the inner diameter of the semi-ring plate 4052. When the end of the steel pipe is closely adhered to the end plate 401, the end of the steel pipe is also closely adhered to the surface of the semi-ring plate 4052;

[0050] After the installation of the steel pipe is completed, the installation cover 4061 is installed on the side of the end plate 401 away from the steel pipe. During installation, the pull rods 4076 on both sides of the end plate 401 are pulled outwards, and then the installation cover 4061 is installed on the side wall of the end plate 401, so that the positioning block 4065 is inserted into the positioning groove 4071 on the end plate 401. Then the pull rods 4076 are released. At this time, the clamping block 4075 moves back under the elastic force of the third spring 4077, so that the clamping block 4075 is clamped into the clamping groove 4066, and the end plate 401 and the installation cover 4061 are clamped and fixed. At this time, the ends of the main steel pipe and the auxiliary steel pipe form a long pipe, and both ends of the long pipe are in close contact with the two end plates 401 respectively, and the long pipe is communicated with the communication grooves 404 on the two end plates 401, so it is communicated with the inner cavities of the two installation covers 4061. At this time, the connecting pipe 4062 at the end of one of the installation covers 4061 is connected to the inert gas storage tank, and the two valves 4063 are opened to introduce inert gas into the inner cavity of the long pipe. The inert gas can protect the steel pipe during the welding process and prevent the steel pipe from reacting with the air at high temperature. After introducing a certain amount of inert gas and completely exhausting the air in the long pipe, the valve 4063 at the gas discharge end is closed. At this time, inert gas continues to be introduced into the inner cavity of the long pipe and the interiors of the two installation covers 4061, so that the air pressure inside the installation cover 4061 increases. Since the communication cavity 4067 is communicated with the inner cavity of the installation cover 4061, one side of the piston 40610 is pressed to move towards the end plate 401, so that the end of the pressure rod 40611 generates a pressure towards the steel pipe on the semi-circular ring plate 4052, further pressing the main steel pipe and the auxiliary steel pipe to improve the welding stability;

[0051] When welding two steel pipes, one of the welding torches 203 is moved to the welding position through the first lateral movement module 204, and then the distance between the welding torch 203 and the weld position is adjusted through the distance adjustment module 205. Subsequently, the first motor 307 on the installation cylinder 302 where the steel pipe is installed is started to drive the installation cylinder 302 to rotate synchronously, so that during the rotation process, seamless welding is performed on the welding end of the steel pipe.

Claims

1. A seamless welding device for construction technology, comprising a workbench (1), characterized in that: The top of the workbench (1) is provided with a welding mechanism (2) and a steel pipe fixing mechanism (3); The steel pipe fixing mechanism (3) comprises a main fixing member (3a) arranged at the middle of the top end of the workbench (1) and auxiliary fixing members (3b) symmetrically arranged on both sides of the main fixing member (3a), the main fixing member (3a) and the auxiliary fixing member (3b) both comprising a mounting tube (302), a rotating driving member for centering and clamping the steel pipe and performing rotational welding is arranged outside the mounting tube (302), and an end stop mechanism (4) is arranged at one end of the mounting tube (302) on the auxiliary fixing member (3b) away from the main fixing member (3a); The end limiting mechanism (4) comprises an end plate (401) arranged on an end of the mounting tube (302) on the auxiliary fixing member (3b) away from the main fixing member (3a); a connecting groove (404) is provided in the middle of the end plate (401); a movable pressing member (405) for pressurizing the steel pipe is provided on the end plate (401); an air intake protection member (406) for driving pressurization can be installed on the end plate (401); and a clamping fixing member (407) for fixing the air intake protection member (406) is provided on the end plate (401); The movable pressing member (405) comprises two semi-annular grooves (4051) symmetrically arranged on the end plate (401), the semi-annular grooves (4051) being arranged in a semi-annular shape, a semi-annular plate (4052) being movably installed inside the semi-annular grooves (4051), the outer wall of the semi-annular plate (4052) being in close contact with the inner wall of the semi-annular grooves (4051), a limiting groove (4053) being arranged on the side away from each other of the two semi-annular grooves (4051), and a limiting block (4053) being installed on the semi-annular plate (4052). 54), the limit block (4054) is slidably installed inside the limit groove (4053), the first springs (4055) are symmetrically installed on both sides of the limit block (4054), the ends of the first springs (4055) are fixedly connected to the inner wall of the limit groove (4053), and a limit swivel (403) is installed on one side of the end plate (401), and the limit swivel (403) is rotatably installed inside the limit ring groove (402), and the limit ring groove (402) is opened at the end of the installation tube (302); The air intake protection member (406) comprises a mounting cover (4061) mounted on one side of the end plate (401); the end of the mounting cover (4061) is in close contact with the surface of the end plate (401) and the surface of the semi-ring plate (4052); the outer diameter of the mounting cover (4061) is smaller than the outer diameter of the semi-ring plate (4052); a connecting pipe (4062) is mounted on one end of the mounting cover (4061); a valve (4063) is mounted on the connecting pipe (4062); side blocks (4064) are symmetrically mounted on both sides of the mounting cover (4061); a card slot (4066) is provided at the end of the side block (4064); and a positioning block (4065) is mounted on the side of the side block (4064) close to the end plate (401); the interior of the mounting cover (4061) is provided with a connecting cavity (4064) at equal angles. 067), an end groove (4068) is provided at one end of the connecting cavity (4067) close to the end plate (401), a piston (40610) is movably installed inside the connecting cavity (4067), a pressure rod (40611) is installed on one side of the piston (40610) close to the end groove (4068), the end of the pressure rod (40611) contacts the surface of the semi-ring plate (4052), a second spring (40612) is installed on one side of the piston (40610) close to the end plate (401), the end of the second spring (40612) is fixedly connected to the inner wall of the end of the connecting cavity (4067), and a side groove (4069) is provided at one end of the connecting cavity (4067) away from the end groove (4068), and the side groove (4069) is connected to the inner cavity of the mounting cover (4061).

2. A seamless welding device for building technology according to claim 1, characterized in that: The clamping fixing member (407) comprises a movable groove (4072) symmetrically opened on the end plate (401), side grooves (4073) are symmetrically opened on both sides of the movable groove (4072), a movable block (4074) is slidably installed inside the movable groove (4072), clamping blocks (4075) are symmetrically installed on both sides of the movable block (4074), a third spring (4077) is installed on the side of the movable block (4074) away from the connecting groove (404), one end of the third spring (4077) is fixedly connected to the inner wall of the end of the movable groove (4072), a pull rod (4076) is installed on one side of the movable block (4074), the pull rod (4076) passes through the outer side of the end plate (401), and positioning grooves (4071) are symmetrically opened on both sides of the end plate (401).

3. A seamless welding device for building technology according to claim 2, characterized in that: The rotary drive member comprises two rotary frames (304), the mounting cylinder (302) is rotatably mounted on the rotary frames (304), a first gear ring (305) is mounted on the outer wall of the mounting cylinder (302), a first gear (306) is meshingly connected below the first gear ring (305), the first gear (306) is fixedly connected to the output shaft of the first motor (307), a bottom seat (303) is arranged below the mounting cylinder (302), the rotary frame (304) and the first motor (307) are both mounted on the bottom seat (303), the bottom seat (303) on the main fixing member (3a) is fixed on the workbench (1), a rotary adjustment member (309) is arranged below the bottom seat (303) on the auxiliary fixing member (3b), and a centering clamp (308) is mounted on the mounting cylinder (302).

4. A seamless welding device for building technology according to claim 3, characterized in that: The centering clamp (308) comprises a clamping plate (3081) arranged at an equal angle on the inner side of the mounting tube (302); a connecting frame (3082) is installed on the clamping plate (3081); the connecting frame (3082) is slidably connected to the mounting tube (302); a connecting block (3083) is installed at the end of the connecting frame (3082); two moving rings (3084) are coaxially arranged on the outer side of the mounting tube (302); the two moving rings (3084) are symmetrically arranged on both sides of the connecting block (3083); connecting rods (3085) are symmetrically hingedly installed at both ends of the connecting block (3083); the ends of the connecting rods (3085) are hingedly connected to the moving rings (3084) A sliding frame (3086) is installed on the bottom seat (303), and two sliding limit plates (3087) are slidably installed on the sliding frame (3086). The two sliding limit plates (3087) are respectively in contact with the two moving rings (3084) on the side away from each other. A double-headed screw (3088) is rotatably installed on the inner wall of the sliding frame (3086). The two sliding limit plates (3087) are respectively threadedly connected with two thread grooves on the double-headed screw (3088) with opposite directions. One end of the double-headed screw (3088) is fixedly connected to the output shaft of the second motor (3089), and the second motor (3089) is fixedly installed on the sliding frame (3086).

5. A seamless welding device for building technology according to claim 4, characterized in that: The rotation adjustment member (309) comprises a sliding seat (3091) arranged below the bottom seat (303) on the auxiliary fixing member (3b); a rotating shaft (3092) is rotatably mounted on the top of the sliding seat (3091); the rotating shaft (3092) is fixedly connected to the bottom seat (303); a second gear ring (3093) is mounted on the rotating shaft (3092); a second gear (3094) is meshingly connected to one side of the second gear ring (3093); the second gear (3094) is fixedly connected to the output shaft of a third motor (3095); the third motor (3095) is fixedly mounted on the sliding seat (3091); a second lateral moving module (301) for driving the sliding seat (3091) to move is arranged between the sliding seat (3091) and the workbench (1); the second lateral moving module (301) is symmetrically arranged on the workbench (1).

6. A seamless welding device for construction technology according to claim 5, characterized in that: The welding mechanism (2) comprises a welding base (201) symmetrically arranged on a workbench (1); a mounting platform (202) is arranged above the welding base (201); a welding gun (203) is installed on the top of the mounting platform (202); a first transverse moving module (204) is arranged between the welding base (201) and the workbench (1); the first transverse moving module (204) is symmetrically arranged on the workbench (1); a distance adjustment module (205) is arranged between the welding base (201) and the mounting platform (202); and a welding height of the welding gun (203) is the same as the height of the central axis of the mounting cylinder (302).

7. A welding method for a seamless welding device for building technology as claimed in claim 6, characterized in that: The following steps are involved: S1. Steel pipe installation: the main steel pipe is centrally installed in the installation tube (302) on the main fixing member (3a), and the auxiliary steel pipe is centrally installed in the installation tube (302) on the auxiliary fixing member (3b); S2, limiting and pressing: the long tube composed of a plurality of steel tubes is limited and pressed by the end plates (401) at the ends of the mounting tubes (302) of the two auxiliary fixing members (3b), and the inner cavity of the long tube is connected with the connecting groove (404); S3, ventilation: install the mounting cover (4061) on the side of the end plate (401) away from the steel pipe, connect one of the connecting pipes (4062) to the inert gas storage box, ventilate the inner cavity of the long pipe and exhaust the air; S4, welding: moving the welding gun (203) to the position where two adjacent steel pipes need to be seamlessly welded, and turning on the first motor (307) on the mounting cylinder (302) on which the steel pipes are mounted, so that the steel pipes rotate synchronously, and welding is performed by the welding gun (203).

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