Automatic pipeline welding device and welding method

Abstract

The invention relates to the field of pipeline welding, and discloses an automatic pipeline welding device and method.The automatic pipeline welding device comprises a pipeline welding frame, and a pipeline alignment mechanism is longitudinally arranged on the upper surface of the pipeline welding frame in a penetrating mode and used for conducting air blowing and dust removing on a welding part while pipeline alignment is conducted every time. The welding inner ends of the two pipelines are placed on the upper surfaces of the two soft supporting cloth belts, then the two pipelines are pushed outwards, after the inner ends of the two pipelines are in butt joint, the air bags on the inner sides of the linkage pressing plates on the outer sides of the two inner opposite-moving threaded frames extrude each other, airflow is obliquely blown to the butt joint position of the two pipelines through the air guide pipe by passing through the position of the air nozzle, and then the two pipelines are welded. Dust and impurities attached to the surfaces of the butt joint positions of the pipelines can be blown away by means of the airflow, so that the butt joint positions of the pipelines are clean, and in this way, automatic butt joint of the inner ends of the two pipelines before welding is guaranteed, and the butt joint positions of the pipelines are cleaned synchronously while butt joint is conducted.

Description

Technical Field

[0001] The invention relates to the field of pipeline welding, and in particular to an automatic pipeline welding device and a welding method. Background Art

[0002] Pipeline welding is a processing method that heats (sometimes pressurizes) metal pipes or pipe parts to partially melt them, and then cools and solidifies them to connect them into a whole. This technology is widely used in many fields such as petroleum, chemical industry, construction, water supply and drainage, heating, gas, nuclear industry, etc.

[0003] According to the Chinese authorized patent announcement number: CN117773435B, a pipeline automated welding device and method are disclosed, including a base and a movable adjustable support fixedly connected to the surface of the base and a welding gun fixedly installed on the surface of the movable adjustable support, the surface of the base is symmetrically fixedly installed with a docking support assembly, the docking support assembly includes a first rectangular block, a fixed block, a first screw, a first roller, a track, a movable seat, a fixed frame, a first hydraulic cylinder and a clamping seat, the surface of the fixed frame is fixedly installed with a pipeline surface grinding assembly, the pipeline surface grinding assembly includes a connecting plate, a first fixed ring, a connecting column, a second fixed ring, a gear ring, a connecting frame, a second hydraulic cylinder, a second U-shaped seat, a first fixed ring, a second ... Three rotating rods, a grinding motor and a grinding wheel can grind the surface of the pipeline to ensure that the pipeline will not shake due to the uneven surface during the rotation support process, thereby improving the welding quality. However, the pipeline automatic welding device still has shortcomings. Before pipeline welding, the two pipelines need to be manually butt-jointed before welding. Manual butt-jointed pipelines are difficult to achieve high-precision alignment, and the welding quality may be reduced due to alignment errors, and rework may even be required. In addition, dust and impurities on the surface of the pipeline butt joint position cannot be completely removed before welding. These impurities may affect the firmness and quality of the welding. Therefore, it is urgent to design a pipeline automatic welding device that can automatically butt the pipelines before welding and clean the butt joint position at the same time. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an automatic pipeline welding device and a welding method, which solve the problems of high labor intensity in pipeline docking and inability to clean the welding machine position.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic pipeline welding device, comprising a pipeline welding frame, wherein a pipeline alignment mechanism is longitudinally provided on the upper surface of the pipeline welding frame, and is used to blow air and clean the welding part at the same time as each pipeline alignment;

[0006] The front and rear sides of the upper surface of the pipeline welding frame are both provided with pipe bottom soft support mechanisms for providing soft support to the areas near the welding parts at the bottom of the two pipelines;

[0007] A welding and grinding mechanism is arranged on the right side of the upper surface of the pipeline welding frame, which is used for grinding the welding parts of the two pipelines.

[0008] Preferably, the pipeline alignment mechanism includes a through plate, a fixed plate, a bidirectional lead screw, an externally opposed threaded frame, an internally opposed threaded frame, a transmission plate, a linkage pressure plate and an air bag, the lower end of the through plate is fixedly connected to the upper surface of the pipeline welding frame, fixed plates are symmetrically arranged on the front and rear sides of the upper surface of the through plate, a bidirectional lead screw is rotatably connected between the two fixed plates, the two-way lead screw has two internally opposed threaded frames symmetrically threaded near the middle, the two-way lead screw has two externally opposed threaded frames symmetrically threaded near both ends, and the lower ends of the internally opposed threaded frame and the externally opposed threaded frame are both slidably connected to the upper surface of the through plate.

[0009] Preferably, the inner sides of the upper ends of the two outer opposing threaded frames are rotatably connected to a transmission disk, the inner sides of the transmission disks are fixedly connected to a pipe clamping ring, and the outer sides of the outer opposing threaded frames are provided with a second motor, and the output end of the second motor is transmission-connected to the transmission disk.

[0010] Preferably, a linkage pressure plate is fixedly connected to the outer side of the inner opposing threaded frame, an airbag is arranged on the inner side of the linkage pressure plate, an L-shaped guard plate is arranged above the airbag, the L-shaped guard plate is fixedly connected to the linkage pressure plate, an air guide tube is arranged on the outer side of the airbag, an air nozzle is arranged at one end of the air guide tube away from the airbag, and the air nozzle is inclined toward the center of the two transmission disks.

[0011] Preferably, a motor 1 is arranged on the outer side of the fixing plate, and the output end of the motor 1 is connected to the bidirectional lead screw transmission.

[0012] Preferably, the pipe bottom soft support mechanism includes a fixed bracket, a limit rod, an upright electric guide rail, a vertical sliding block, a pushing arm, a lifting pull plate, a soft support cloth belt, a positioning plate and an electric push rod. The lower end of the fixed bracket is fixedly connected to the upper surface of the pipe welding frame, and two limit rods are arranged on the inner side of the upper end of the fixed bracket. Two transverse sliding blocks are penetrated at both ends of the two limit rods, and pushing arms are fixedly connected to the middle of two transverse sliding blocks relative to the transverse sliding blocks. The inner side of the pushing arm is fixedly connected to the upright electric guide rail, and the inner side of the upright electric guide rail is transmission-connected to the vertical sliding block, the lower surface of the vertical sliding block is fixedly connected to the lifting pull plate, and the inner side of the lifting pull plate is fixedly connected to the soft support cloth belt.

[0013] Preferably, the outer side of the pushing arm is fixedly connected to the free end of the electric push rod 1, the fixed end of the electric push rod 1 is fixedly connected to the upper surface of the fixed bracket, the free end of the electric push rod 1 passes through the positioning plate, and the front and rear ends of the positioning plate are respectively fixedly connected to two limit rods.

[0014] Preferably, the welding grinding mechanism includes a grinding frame, two electric push rods, a grinding plate and a grinding wheel. The lower end of the grinding frame is fixedly connected to the right side of the upper surface of the pipe welding frame. Two electric push rods are arranged inside the grinding frame. The free end of the two electric push rods is fixedly connected to the grinding plate. The end of the grinding plate away from the two electric push rods is engaged and connected to the grinding wheel.

[0015] Preferably, a welding table is fixedly connected to the left side of the upper surface of the pipe welding frame, a mobile welding frame is slidably connected to the upper surface of the welding table, a welding machine is arranged on the upper surface of the mobile welding frame, the front side of the mobile welding frame is fixedly connected to the free end of the cylinder, and the fixed end of the cylinder is fixedly connected to the outside of the welding table.

[0016] A pipeline automatic welding method comprises the following steps:

[0017] Step 1: Automatic pipe docking: First, place the inner ends of the two pipes to be welded on the upper surfaces of two pre-set soft support cloth belts, respectively, to ensure that the pipes are in the correct initial position. Then, push the two pipes outwards respectively, so that their outer ends are smoothly inserted into the pipe clamps on the transmission disk, and complete the preliminary docking preparations. Start the motor 1 to drive the bidirectional lead screw to start rotating. The rotation of the bidirectional lead screw causes the outer and inner threaded racks on the front and rear sides to move inwards synchronously. As the outer threaded racks move inwards, the inner ends of the two pipes gradually approach each other with the help of the soft support cloth belts until they fit together, achieving precise automatic docking.

[0018] Step 2: Cleaning the pipe joint position: When the inner ends of the two pipes are butted against each other, the air bags on the inner side of the linked pressure plates on the outer sides of the two inner oppositely shifted threaded racks begin to squeeze each other, and the air flow is guided to the air nozzle through the air guide pipe and blown obliquely to the joint of the two pipes. With the impact force of the air flow, the dust and impurities on the surface of the joint position are effectively blown away, ensuring the cleanliness of the pipe joint and creating good conditions for welding;

[0019] Step 3: Adjust the soft support at the bottom of the pipe: By operating the two electric push rods, control the outward or inward movement of the push arm, so as to adjust the tension of the soft support cloth belt. When the push arm moves outward, the soft support cloth belt gradually tightens, and vice versa, it gradually relaxes to meet the support requirements of different pipe materials. The height position of the soft support cloth belt is adjusted by the vertical movement of the vertical slider on the inner side of the vertical electric guide rail to ensure that the pipe remains stable during welding;

[0020] Step 4: Welding and grinding: Use a welding machine to weld the two pipe connection positions. During the welding process, the transmission disk is driven to rotate by motor 2 to rotate the two pipes, and then the welding machine welds other welding points until the pipe rotates one circle. After the welding of the pipe docking position is completed, start the electric push rod 2 to drive the grinding plate to move to the welding position. The grinding wheel on the grinding plate contacts the pipe welding position, start the motor to rotate the grinding wheel, and finely grind the welding position to eliminate welding marks.

[0021] Beneficial Effects

[0022] The present invention provides a pipeline automatic welding device and welding method. Compared with the prior art, it has the following beneficial effects:

[0023] 1. In the present invention, by setting up a pipeline alignment mechanism, before the pipelines are welded, the welded inner ends of the two pipelines are placed on the upper surfaces of the two soft support cloth belts, and then the two pipelines are pushed outwards respectively, so that the outer ends of the two pipelines are inserted into the pipeline clamping rings of the transmission disk, and then the bidirectional lead screw is driven to rotate by the motor 1. While the bidirectional lead screw rotates, the outer opposed threaded frame and the inner opposed threaded frame located on the front and rear sides of the bidirectional lead screw move inwards. In the process of the two outer opposed threaded frames moving inwards, the inner ends of the two pipelines approach each other until they fit together, thereby realizing the automatic docking of the two pipelines. In addition, since the two inner opposed threaded frames and the outer butt threaded frame move inward synchronously, when the inner ends of the two pipes are butted against each other, the air bags on the inner sides of the outer linkage pressure plates of the two inner opposed threaded frames squeeze each other. While the two air bags squeeze, the air flow is blown obliquely to the butt joint of the two pipes through the position of the air nozzle through the air guide pipe. With the help of the air flow, the dust and impurities attached to the surface of the butt joint of the pipes can be blown away, thereby ensuring the cleanliness of the butt joint of the pipes and improving the welding quality. In this way, the automatic butt joint of the inner ends of the two pipes before welding and the cleaning of the butt joint of the pipes can be realized synchronously while the butt joint is ensured;

[0024] 2. In the present invention, through the set pipe bottom soft support mechanism, after the two pipes are placed on the two soft support cloth belts, the two push arms are controlled to move by the two electric push rods. When the two push arms move outward, the soft support cloth belt is gradually tightened by the tension. On the contrary, when the two push arms move inward, the soft support cloth belt gradually relaxes and cooperates with the vertical slider to move vertically on the inner side of the vertical electric guide rail to adjust the height position of the soft support cloth belt. Whether it is metal or other metal composite materials, the pressure received can be adjusted according to the material of the pipe to provide appropriate support force. In addition, this soft support method uses the soft support cloth belt to fit the lower surface of the pipe, which will not cause damage to the pipe surface. In the process of the motor driving the transmission disk to rotate and adjust the welding position of the pipe, this soft support method will not restrict the pipe.

[0025] 3. In the present invention, by setting up a welding and grinding mechanism, after the welding of the two pipe docking positions is completed, the grinding plate is driven to move to the grinding position by the second electric push rod, so that the grinding wheel on the inner side of the grinding plate contacts the welding positions of the two pipes. A motor is provided at the connection position between the grinding plate and the grinding wheel. The grinding wheel is driven to rotate by the motor to grind the pipe welding position, thereby ensuring the beauty of the pipe grinding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a right-side three-dimensional structural schematic diagram of a pipeline automatic welding device proposed by the present invention;

[0027] Figure 2 This is a schematic diagram of the left three-dimensional structure of a pipeline automatic welding device proposed by the present invention;

[0028] Figure 3 A schematic diagram of the three-dimensional structure of an automatic pipeline welding device proposed by the present invention from an oblique upper perspective;

[0029] Figure 4 This is a schematic diagram of the front structure of a pipe bottom soft support mechanism in a pipe automatic welding device proposed by the present invention;

[0030] Figure 5 This is a structural schematic diagram of a pipe bottom soft support mechanism in a pipe automatic welding device proposed by the present invention from an oblique upper perspective;

[0031] Figure 6 This is a schematic diagram of the structure of a pipeline alignment mechanism in a pipeline automatic welding device proposed by the present invention;

[0032] Figure 7 A pipeline automatic welding device proposed by the present invention Figure 6 A is an enlarged view of the middle image.

[0033] Legend:

[0034] 1. Pipe welding frame; 2. Pipe alignment mechanism; 201. Through plate; 202. Fixed plate; 203. Bidirectional screw; 204. Externally shifted thread frame; 205. Internally shifted thread frame; 206. Motor 1; 207. Motor 2; 208. Transmission plate; 209. Pipe clamp; 210. Linked pressure plate; 211. Air bag; 212. L-shaped guard plate; 213. Air guide tube; 214. Air nozzle; 3. Pipe bottom soft support mechanism; 301. Fixed ...3. Fixed bracket; 302, limit rod; 303, upright electric guide rail; 304, vertical sliding block; 305, push arm; 306, lifting pull plate; 307, soft support cloth belt; 308, positioning plate; 309, electric push rod one; 310, horizontal sliding block; 4, welding table; 5, cylinder; 6, mobile welding frame; 7, welding machine; 8, welding and grinding mechanism; 801, grinding frame; 802, electric push rod two; 803, grinding plate; 804, grinding wheel. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-Figure 7 The present invention provides two technical solutions, which specifically include the following embodiments:

[0037] Embodiment 1:

[0038] A pipeline automatic welding device includes a pipeline welding frame 1, and a pipeline alignment mechanism 2 is longitudinally penetrated on the upper surface of the pipeline welding frame 1, which is used to blow air and clean the welding part at the same time as each pipeline alignment. The pipeline alignment mechanism 2 includes a penetration plate 201, a fixed plate 202, a bidirectional lead screw 203, an outer counter-moving thread frame 204, an inner counter-moving thread frame 205, a transmission plate 208, a linkage pressure plate 210 and an air bag 211. The lower end of the penetration plate 201 is fixedly connected to the upper surface of the pipeline welding frame 1, and the front and rear ends of the upper surface of the penetration plate 201 are fixedly connected to the upper surface of the pipeline welding frame 1. A fixed plate 202 is symmetrically arranged on both sides, and a bidirectional lead screw 203 is rotatably connected between the two fixed plates 202. The bidirectional lead screw 203 is symmetrically threadedly connected to two inner opposed thread frames 205 near the middle, and the bidirectional lead screw 203 is symmetrically threadedly connected to two outer opposed thread frames 204 near the two ends. The lower ends of the inner opposed thread frames 205 and the outer opposed thread frames 204 are both slidably connected to the upper surface of the through plate 201, and the inner sides of the upper ends of the two outer opposed thread frames 204 are both rotatably connected to a transmission disk 208. The transmission disk 20 8 is fixedly connected to the inner side of the pipe clamp ring 209, the outer side of the outer oppositely moving threaded frame 204 is provided with a second motor 207, the output end of the second motor 207 is transmission-connected to the transmission disc 208, the outer side of the inner oppositely moving threaded frame 205 is fixedly connected to the linkage pressure plate 210, the inner side of the linkage pressure plate 210 is provided with an air bag 211, and an L-shaped guard plate 212 is provided above the air bag 211. The two L-shaped guard plates 212 are alternately arranged up and down. When the two inner oppositely moving threaded frames 205 are close to each other, one of the L-shaped guard plates 212 is inserted into the other L On the inner side of the L-shaped guard plate 212, two L-shaped guard plates 212 form a protective shield above the airbag 211 to prevent the airbag 211 from being damaged by welding slag. The L-shaped guard plate 212 is fixedly connected to the linked pressure plate 210. An air duct 213 is arranged on the outside of the airbag 211. An air nozzle 214 is arranged at one end of the air duct 213 away from the airbag 211. The air nozzle 214 is inclined to the center of the two transmission disks 208. A motor 206 is arranged on the outside of the fixed plate 202. The output end of the motor 206 is transmission-connected to the bidirectional lead screw 203.

[0039] During operation, before the pipes are welded, the inner ends of the two pipes are placed on the upper surfaces of the two soft support cloth belts 307, and then the two pipes are pushed outwards respectively so that the outer ends of the two pipes are inserted into the pipe clamping rings 209 of the transmission disk 208, and then the two-way screw 203 is driven to rotate by the motor 1 206. While the two-way screw 203 rotates, the outer opposing threaded frames 204 and the inner opposing threaded frames 205 located on the front and rear sides of the two-way screw 203 move inwards. In the process of the two outer opposing threaded frames 204 moving inwards, the inner ends of the two pipes approach each other until they fit together, thereby realizing the automatic docking of the two pipes. In addition, by The two inner opposed threaded frames 205 and the outer docking threaded frames move inward synchronously. When the inner ends of the two pipes are docked with each other, the air bags 211 on the inner sides of the outer linkage pressure plates 210 of the two inner opposed threaded frames 205 squeeze each other. While the two air bags 211 are squeezing, the air flow is blown obliquely to the docking point of the two pipes through the position of the air nozzle 214 through the air guide pipe 213. With the help of the air flow, dust and impurities attached to the surface of the pipe docking position can be blown away, thereby ensuring the cleanliness of the pipe docking position and improving the welding quality. In this way, the automatic docking of the inner ends of the two pipes before welding and the cleaning of the pipe docking position can be achieved simultaneously while docking.

[0040] Embodiment 2:

[0041] On the basis of the first embodiment, both the front and rear sides of the upper surface of the pipe welding frame 1 are provided with a pipe bottom soft support mechanism 3, which is used to provide soft support for the areas near the welding parts of the bottom of the two pipes. The pipe bottom soft support mechanism 3 includes a fixed bracket 301, a limit rod 302, an upright electric guide rail 303, a vertical sliding block 304, a push arm 305, a lifting pull plate 306, a soft support cloth belt 307, a positioning plate 308 and an electric push rod 309. The lower end of the fixed bracket 301 is fixedly connected to the upper surface of the pipe welding frame 1, and the inner side of the upper end of the fixed bracket 301 is provided with There are two limit rods 302, and two transverse sliding blocks 310 are penetrated at both ends of the two limit rods 302. A push arm 305 is fixedly connected between the two relative transverse sliding blocks 310. The inner side of the push arm 305 is fixedly connected to the upright electric guide rail 303. The inner side of the upright electric guide rail 303 is transmission-connected to the vertical sliding block 304. The lower surface of the vertical sliding block 304 is fixedly connected to a lifting plate 306. The inner side of the lifting plate 306 is fixedly connected to a soft support cloth belt 307. The outer side of the push arm 305 is fixedly connected to the free end of the electric push rod 309. The fixed end of the push rod 309 is fixedly connected to the upper surface of the fixed bracket 301, and the free end of the electric push rod 309 passes through the positioning plate 308. The front and rear ends of the positioning plate 308 are respectively fixedly connected to the two limit rods 302. After the two pipes are placed on the two soft support belts 307, the two push arms 305 are controlled to move by the two electric push rods 309. When the two push arms 305 move outward, the soft support belt 307 is gradually tightened by the tension. On the contrary, when the two push arms 305 move inward, the soft support belt 307 is gradually loosened and Cooperate with the vertical moving slider 304 to move vertically inside the upright electric guide rail 303 to adjust the height position of the soft support cloth belt 307. No matter it is metal or other metal synthetic materials, the material can adapt the pressure received according to the material of the pipeline to provide appropriate supporting force. In addition, this soft support method uses the soft support cloth belt 307 to fit the lower surface of the pipeline without causing damage to the pipeline surface. Moreover, in the process of the motor 207 driving the transmission disk 208 to rotate and adjust the pipeline welding position, this soft support method will not restrict the pipeline.

[0042] Preferably, a welding and grinding mechanism 8 is provided on the right side of the upper surface of the pipeline welding frame 1 for grinding the two pipeline welding parts. The welding and grinding mechanism 8 includes a grinding frame 801, a second electric push rod 802, a grinding plate 803 and a grinding wheel 804. The lower end of the grinding frame 801 is fixedly connected to the right side of the upper surface of the pipeline welding frame 1. A second electric push rod 802 is provided inside the grinding frame 801. The free end of the second electric push rod 802 is fixedly connected to the grinding plate 803. The end of the grinding plate 803 away from the second electric push rod 802 is engaged with the grinding wheel 804. The left side of the upper surface of the pipeline welding frame 1 is fixedly connected to the welding table 4. The welding table 4 A mobile welding frame is slidably connected to the upper surface, and a welding machine 7 is arranged on the upper surface of the mobile welding frame 6. The front side of the mobile welding frame 6 is fixedly connected to the free end of the cylinder 5, and the fixed end of the cylinder 5 is fixedly connected to the outer side of the welding table 4. After the welding of the two pipes at the butt joint is completed, the grinding plate 803 is driven to move to the grinding position by the electric push rod 802, so that the grinding wheel 804 on the inner side of the grinding plate 803 contacts the welding positions of the two pipes. A motor is arranged at the connection position between the grinding plate 803 and the grinding wheel 804. The grinding wheel 804 is driven to rotate by the motor to grind the pipe welding position, thereby ensuring the beauty of the pipe grinding device.

[0043] A pipeline automatic welding method comprises the following steps:

[0044] Step 1: Automatic pipe docking: First, place the inner ends of the two pipes to be welded on the upper surfaces of two pre-set soft support cloth belts 307, respectively, to ensure that the pipes are in the correct initial position, then push the two pipes outwards respectively, so that their outer ends are smoothly inserted into the pipe clamp ring 209 on the transmission disk 208, and complete the preliminary docking preparation work, start the motor 1 206, drive the bidirectional lead screw 203 to start rotating, and the rotation of the bidirectional lead screw 203 causes the outer opposing threaded frame 204 and the inner opposing threaded frame 205 located on the front and rear sides thereof to move inwards synchronously, and as the outer opposing threaded frame 204 moves inwards, the inner ends of the two pipes gradually approach each other with the assistance of the soft support cloth belt 307, until they fit together, realizing accurate automatic docking;

[0045] Step 2: Cleaning the joint position of the pipes: When the inner ends of the two pipes are butted against each other, the air bags 211 inside the interlocking pressure plates 210 outside the two inner oppositely shifted threaded racks 205 begin to squeeze each other, and the air flow is guided to the air nozzle 214 through the air guide pipe 213, and blown to the joint of the two pipes in an oblique manner. With the impact force of the air flow, the dust and impurities on the surface of the joint position are effectively blown away, ensuring the cleanliness of the pipe joint and creating good conditions for welding;

[0046] Step 3: Adjustment of the soft support at the bottom of the pipe: By operating the two electric push rods 309, the push arm 305 is controlled to move outward or inward, so as to adjust the tension of the soft support cloth belt 307. When the push arm 305 moves outward, the soft support cloth belt 307 is gradually tightened, and vice versa, it is gradually loosened to meet the support requirements of different pipe materials. The height position of the soft support cloth belt 307 is adjusted by vertically moving the vertical slider 304 on the inner side of the vertical electric guide rail 303 to ensure that the pipe remains stable during the welding process.

[0047] Step 4: Welding and grinding: The two pipe connection positions are welded by the welding machine 7. During the welding process, the transmission disk 208 is driven to rotate by the motor 207 to rotate the two pipes, and then the welding machine 7 welds other welding points until the pipe rotates one circle. After the welding of the pipe docking position is completed, the electric push rod 2 802 is started to drive the grinding plate 803 to move to the welding position. The grinding wheel 804 on the grinding plate 803 contacts the pipe welding position, and the motor is started to rotate the grinding wheel 804 to finely grind the welding position to eliminate welding marks.

[0048] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the application should be included in the protection scope of the present application.

Claims

1. A pipeline automatic welding device, comprising a pipeline welding frame (1), characterized in that: A pipeline alignment mechanism (2) is longitudinally provided on the upper surface of the pipeline welding frame (1) and is used for blowing air and cleaning the welding part each time the pipeline is aligned; The upper surface of the pipeline welding frame (1) is provided with pipe bottom soft support mechanisms (3) on both the front and rear sides thereof, for providing soft support to the areas near the welding positions at the bottoms of the two pipelines; A welding grinding mechanism (8) is provided on the right side of the upper surface of the pipeline welding frame (1) for grinding the welding parts of the two pipelines.

2. The automatic pipeline welding device according to claim 1 is characterized in that: The pipeline alignment mechanism (2) comprises a through plate (201), a fixed plate (202), a bidirectional lead screw (203), an outer counter-moving threaded frame (204), an inner counter-moving threaded frame (205), a transmission plate (208), a linkage pressure plate (210) and an air bag (211); the lower end of the through plate (201) is fixedly connected to the upper surface of the pipeline welding frame (1); fixed plates (202) are symmetrically arranged on the front and rear sides of the upper surface of the through plate (201); a bidirectional lead screw (203) is rotatably connected between the two fixed plates (202); two inner counter-moving threaded frames (205) are symmetrically threadedly connected to the position of the bidirectional lead screw (203) near the middle; two outer counter-moving threaded frames (204) are symmetrically threadedly connected to the position of the bidirectional lead screw (203) near the two ends; and the lower ends of the inner counter-moving threaded frames (205) and the outer counter-moving threaded frames (204) are both slidably connected to the upper surface of the through plate (201).

3. The automatic pipeline welding device according to claim 2 is characterized in that: The inner sides of the upper ends of the two outer counter-moving threaded frames (204) are both rotatably connected to a transmission disk (208), the inner sides of the transmission disk (208) are fixedly connected to a pipe clamping ring (209), and the outer sides of the outer counter-moving threaded frames (204) are provided with a second motor (207), and the output end of the second motor (207) is transmission-connected to the transmission disk (208).

4. The automatic pipeline welding device according to claim 2 is characterized in that: The outer side of the inner counter-moving threaded frame (205) is fixedly connected with a linkage pressure plate (210), the inner side of the linkage pressure plate (210) is provided with an air bag (211), an L-shaped guard plate (212) is provided above the air bag (211), the L-shaped guard plate (212) is fixedly connected with the linkage pressure plate (210), the outer side of the air bag (211) is provided with an air guide tube (213), the end of the air guide tube (213) away from the air bag (211) is provided with an air nozzle (214), and the air nozzle (214) is inclined to the center of the two transmission plates (208).

5. The automatic pipeline welding device according to claim 2 is characterized in that: A motor 1 (206) is arranged outside the fixing plate (202), and an output end of the motor 1 (206) is transmission-connected to a bidirectional lead screw (203).

6. The automatic pipeline welding device according to claim 1 is characterized in that: The pipe bottom soft support mechanism (3) comprises a fixed support (301), a limit rod (302), an upright electric guide rail (303), a vertical sliding block (304), a push arm (305), a lifting and pulling plate (306), a soft support cloth belt (307), a positioning plate (308) and an electric push rod (309). The lower end of the fixed support (301) is fixedly connected to the upper surface of the pipe welding frame (1). Two limit rods (302) are arranged on the inner side of the upper end of the fixed support (301). The two limit rods (302) are arranged on the inner side of the upper end of the fixed support (301). Two transverse sliding blocks (310) are provided at both ends of the two transverse sliding blocks (302), and a push arm (305) is fixedly connected between the two relative transverse sliding blocks (310), and the inner side of the push arm (305) is fixedly connected to a vertical electric guide rail (303), and the inner side of the vertical electric guide rail (303) is transmission-connected to a vertical sliding block (304), and the lower surface of the vertical sliding block (304) is fixedly connected to a lifting plate (306), and the inner side of the lifting plate (306) is fixedly connected to a soft support cloth belt (307).

7. The automatic pipeline welding device according to claim 6, characterized in that: The outer side of the push arm (305) is fixedly connected to the free end of the electric push rod (309), and the fixed end of the electric push rod (309) is fixedly connected to the upper surface of the fixed bracket (301). The free end of the electric push rod (309) passes through the positioning plate (308), and the front and rear ends of the positioning plate (308) are respectively fixedly connected to the two limit rods (302).

8. The automatic pipeline welding device according to claim 1, characterized in that: The welding grinding mechanism (8) comprises a grinding frame (801), a second electric push rod (802), a grinding plate (803) and a grinding wheel (804); the lower end of the grinding frame (801) is fixedly connected to the right side of the upper surface of the pipeline welding frame (1); the second electric push rod (802) is arranged inside the grinding frame (801); the free end of the second electric push rod (802) is fixedly connected to the grinding plate (803); and the end of the grinding plate (803) away from the second electric push rod (802) is engaged and connected to the grinding wheel (804).

9. The automatic pipeline welding device according to claim 1, characterized in that: A welding platform (4) is fixedly connected to the left side of the upper surface of the pipeline welding frame (1), a movable welding frame is slidably connected to the upper surface of the welding frame (4), a welding machine (7) is arranged on the upper surface of the movable welding frame (6), the front side of the movable welding frame (6) is fixedly connected to the free end of the cylinder (5), and the fixed end of the cylinder (5) is fixedly connected to the outer side of the welding platform (4).

10. A pipeline automatic welding method, based on any one of the pipeline automatic welding devices according to claims 1-9, characterized in that: The following steps are involved: Step 1: Automatic pipe docking: First, the inner ends of the two pipes to be welded are placed on the upper surfaces of two pre-set soft support cloth belts (307) to ensure that the pipes are in the correct initial position. Then, the two pipes are pushed outwards respectively so that their outer ends are smoothly inserted into the pipe clamping ring (209) on the transmission disk (208). After completing the preliminary docking preparation work, the motor 1 (206) is started to drive the bidirectional lead screw (203) to start rotating. The rotation of the bidirectional lead screw (203) causes the outer opposing threaded frame (204) and the inner opposing threaded frame (205) located on the front and rear sides thereof to move inwards synchronously. As the outer opposing threaded frame (204) moves inwards, the inner ends of the two pipes gradually approach each other with the assistance of the soft support cloth belts (307) until they fit together, thereby achieving accurate automatic docking. Step 2: Cleaning the joint position of the pipes: When the inner ends of the two pipes are butted against each other, the air bags (211) on the inner sides of the interlocking pressure plates (210) on the outer sides of the two inner oppositely shifted threaded frames (205) begin to squeeze each other, and the air flow is guided to the air nozzle (214) through the air guide tube (213), and blown obliquely to the joint of the two pipes. With the impact force of the air flow, the dust and impurities on the surface of the joint position are effectively blown away, ensuring the cleanliness of the pipe joint and creating good conditions for welding; Step 3: Adjustment of the soft support at the bottom of the pipe: by operating the two electric push rods (309), the outward or inward movement of the push arm (305) is controlled, thereby adjusting the tension of the soft support cloth belt (307). When the push arm (305) moves outward, the soft support cloth belt (307) is gradually tightened, and vice versa, it is gradually loosened to meet the support requirements of different pipe materials. The height position of the soft support cloth belt (307) is adjusted by vertically moving the vertical slider (304) on the inner side of the vertical electric guide rail (303) to ensure that the pipe remains stable during the welding process. Step 4: Welding and grinding: The two pipe connection positions are welded by the welding machine (7). During the welding process, the transmission plate (208) is driven to rotate by the second motor (207) to rotate the two pipes, and then the welding machine (7) welds other welding points until the pipes rotate one circle. After the welding of the pipe joint position is completed, the second electric push rod (802) is started to drive the grinding plate (803) to move to the welding position. The grinding wheel (804) on the grinding plate (803) contacts the pipe welding position, and the motor is started to rotate the grinding wheel (804) to finely grind the welding position to eliminate welding marks.

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