A device for splicing anti-corrosion pipes

Abstract

The invention discloses a device for splicing anti-corrosion pipelines, which relates to the technical field of pipeline splicing, and comprises a base and a program control component. A support frame 1 and a first linear motion component are arranged on the base, and a plurality of centering clamping components are arranged on both sides of the support frame 1, and the centering clamping components are slidably connected with the base. A grinding component is arranged in the support frame 1, and the grinding component is fixedly mounted on the base; a second linear motion component is arranged on the support frame 1, and a positioning component and a welding component are arranged on the second linear motion component, and the positioning component and the welding component are distributed at intervals on the second linear motion component, and two groups of positioning components are arranged, and the two groups of positioning components are respectively distributed on both sides of the second linear motion component. The invention can perform centering clamping on pipelines to be spliced, thereby reducing splicing errors, and can position the splicing joint of two pipelines and quickly weld the splicing joint, thereby improving the overall splicing quality and efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline splicing, and in particular to a device for splicing anti-corrosion pipelines. Background Art

[0002] In the normal processing of anti-corrosion pipes, since the actual processing length of each pipe is limited, it is necessary to splice multiple shorter pipes by welding in the subsequent processing, and splice multiple shorter pipes into a longer pipe; in the prior art, when splicing pipes, usually a manual crane is used to place two pipes to be spliced ​​on a support frame for splicing, but this splicing method is inefficient and inconvenient to center and clamp the two pipes. At the same time, since the position of the pipe is different each time, it is necessary to manually adjust the position of the pipe or the welding machine, which is time-consuming and labor-intensive and reduces the splicing efficiency.

[0003] A Chinese utility model patent with announcement number "CN213410990U" proposes a splicing device for a natural gas pipeline, including a shell and a limit device, through holes are provided on both sides of the shell, a pull rod is slidably connected to the top of the inner wall of the shell, the bottom of the pull rod is fixedly welded to the top of the heating plate, a limit bracket is slidably connected to the bottom of the heating plate, a limit groove is provided on the limit bracket, the limit groove is slidably connected to the sliding rod fixed on the heating plate, and a limit spring is fixedly welded between the top of the limit bracket and the inner wall of the shell; although this patent can limit the pipeline during pipeline welding, it cannot center and clamp the pipeline, cannot drive the pipeline to move, and cannot grind the pipeline welding point. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a device for splicing anti-corrosion pipes, including a base and a program control component, wherein a support frame 1 and a first linear motion component are arranged on the base, and a plurality of centering clamping components are arranged on both sides of the support frame 1, and the centering clamping components are slidably connected to the base, and a grinding component is arranged in the support frame 1, and the grinding component is fixedly mounted on the base; a second linear motion component is installed on the support frame 1, and a positioning component and a welding component are installed on the second linear motion component, and the positioning component and the welding component are distributed at intervals on the second linear motion component, and the positioning component is provided with two groups, and the two groups of positioning components are respectively distributed on both sides of the second linear motion component; the positioning component includes a support rod and a positioning head, the support rod is fixedly mounted on the second linear motion component, the support rod is slidably connected to the support frame 1, and the positioning head is slidably mounted on the support rod, a spring is connected between the support rod and the positioning head, and the two surfaces of the two positioning heads that are far away from each other are both arc surfaces, and the two surfaces of the two positioning heads that are close to each other are planes, and the two planes coincide, and a sensor is arranged in the support rod.

[0005] Furthermore, the centering clamping assembly includes a first driving unit, a first expansion unit, and a clamping head, the first driving unit is slidably mounted on the base, the first expansion unit is mounted on the first driving unit, and the clamping head is mounted on the first expansion unit; the grinding assembly includes a second driving unit, a second expansion unit, and a grinding head, the second driving unit is fixedly mounted on the base, the second expansion unit is mounted on the second driving unit, and the grinding head is mounted on the second expansion unit.

[0006] Further, the first driving unit includes a support frame 2, a motor 2, a gear 1, a gear 2, and a support shaft, the support frame 2 is installed on the base, the motor 2 is installed on the support frame 2, the support shaft is rotatably installed on the support frame 2, the gear 1 is fixedly installed on the support shaft, the gear 2 is rotatably installed in the support frame 2, the gear 1 is arranged in the support frame 2, the gear 1 and the gear 2 are meshingly connected, and a circular hole is arranged on the gear 2.

[0007] Furthermore, the first expansion unit includes an electric cylinder 1, a first connecting rod mechanism, and a second connecting rod mechanism. The first connecting rod mechanism and the second connecting rod mechanism are both installed on gear 2. The first connecting rod mechanism and the second connecting rod mechanism are both provided with multiple ones. The two second connecting rods are connected by a first connecting rod mechanism. The electric cylinder 1 is fixedly installed on gear 2 by a fixing rod, and the piston rod of the electric cylinder 1 is connected to the second connecting rod mechanism.

[0008] Further, the first connecting rod mechanism includes connecting rod 2, slider 1, sliding rod, and connecting rod 3. The slider 1 and the sliding rod are both slidably installed on gear 2. One end of the connecting rod 2 and the connecting rod 3 are both slidably connected to the slider 1. The other ends of the connecting rod 2 and the connecting rod 3 are respectively connected to the second connecting rod mechanism through a sliding rod. The second connecting rod mechanism includes connecting rod 1, connecting rod 4, and slider 2. The slider 2 is slidably installed on gear 2. One end of the connecting rod 1 and the connecting rod 4 are both slidably connected to the slider 2. The connecting rod 2 is connected to the connecting rod 1 through a sliding rod, and the connecting rod 3 is connected to the connecting rod 4 through another sliding rod.

[0009] Furthermore, the structure of the second drive unit is the same as that of the first drive unit, the structure of the second expansion unit is the same as that of the first expansion unit, the clamping head is fixedly mounted on the slider 2 of the first expansion unit, and there are multiple clamping heads, which are evenly spaced in a circular shape, and the clamping head is provided with an arc groove matching the size of the pipe, the grinding head is fixedly mounted on the slider 2 of the second expansion unit, and there are multiple grinding heads, which are evenly spaced in a circular shape, the support frame 2 on the first drive unit is slidably connected to the base, the support frame 2 on the second drive unit is fixedly connected to the base, a support block is fixedly mounted on the support frame 2 of the first drive unit, an electric cylinder 2 is fixedly mounted on the support block, and a clamping block is fixedly mounted on the piston rod of the electric cylinder 2.

[0010] Further, the first linear motion component includes a screw 1, a slide 1, and a motor 1, wherein the motor 1 is fixedly mounted on the base, the screw 1 is rotatably mounted on the base, the slide 1 is slidably mounted on the base, the slide 1 and the screw 1 are connected by threads, and there are multiple slides 1, and the first linear motion component is provided in two groups, and the two groups of first linear motion components are respectively distributed on both sides of the base, the slide 1 is provided with a slot matching the card block, and the motor 1 and the card block are both provided with sensors.

[0011] Furthermore, the second linear motion component includes a motor three, a slide two, a screw two, a connecting rod five, and a slide three. The motor three is fixedly mounted on the support frame one, the slide two and the slide three are both slidably mounted on the support frame one, the screw two is rotatably mounted on the support frame one, the output shaft of the motor three is fixedly connected to the screw two, the slide two and the slide three are both threadedly connected to the screw two, the slide two and the slide three are spaced apart on the support frame one, the support rod is fixedly connected to the slide three through the connecting rod five, and two connecting rods five are provided.

[0012] Furthermore, the welding assembly includes a welding unit and a support frame three, the support frame three is fixedly mounted on a slide seat two, the support frame three is slidably connected to the support frame one, and the welding unit is fixedly mounted on the support frame three.

[0013] Furthermore, the support frame 2 is provided with a rotating groove 1, a rotating groove 2, a rotating groove 3, a rotating groove 4, a connecting hole 1, and a connecting hole 2. The electric cylinder 1 is rotatably connected to the rotating groove 2. The gear 2 is rotatably installed in the rotating groove 1. The gear 2 is provided with a circular guide rail, which is rotatably connected to the rotating groove 3. The output shaft of the motor 2 is rotatably connected to the connecting hole 1. The support shaft is rotatably connected to the connecting hole 2. The gear 1 is arranged in the rotating groove 4.

[0014] Compared with the prior art, the present invention has the following advantages: (1) the present invention can clamp the center of the pipe before splicing it by means of a centering clamping assembly, thereby reducing the error during pipe splicing; (2) the present invention can accurately move the splicing point of two pipes to the position of the welding assembly by means of a positioning assembly, thereby solving the problem of multiple adjustments of the splicing point due to position deviation when placing the pipes; (3) the present invention can clamp and rotate the spliced ​​pipe by means of the cooperation of the centering clamping assembly and the welding assembly, thereby enabling rapid welding of the spliced ​​joint; (4) the present invention can rapidly grind the weld point after welding by means of the cooperation of the centering clamping assembly and the grinding assembly, thereby improving the efficiency of welding and grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 .

[0016] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 .

[0017] Figure 3 For the present invention Figure 2 Enlarged structural diagram at A in the middle.

[0018] Figure 4 The overall structure of the present invention is shown in FIG. Figure 3 .

[0019] Figure 5 The overall structure of the present invention is shown in FIG. Figure 4 .

[0020] Figure 6 The local structure of the present invention is shown in FIG. Figure 1 .

[0021] Figure 7 The local structure of the present invention is shown in FIG. Figure 2 .

[0022] Figure 8 The local structure of the present invention is shown in FIG. Figure 3 .

[0023] Fig. 9 For the present invention Figure 8 Enlarged structural diagram at B in the middle.

[0024] Fig.10 It is a schematic diagram of the structure of the grinding assembly of the present invention.

[0025] Fig.11 The local structure of the present invention is shown in FIG. Figure 4 .

[0026] Fig.12 It is a structural schematic diagram of the second support frame of the present invention.

[0027] Fig.13 The cross-sectional view of the support frame 2 of the present invention Figure 1 .

[0028] Fig.14 The cross-sectional view of the support frame 2 of the present invention Figure 2 .

[0029] Fig.15 It is a schematic diagram of the structure of the centering clamping assembly of the present invention.

[0030] Figure numbers: 101-base; 102-screw 1; 103-slide 1; 104-motor 1; 105-support frame 1; 201-pipeline; 301-support frame 2; 302-motor 2; 303-gear 1; 304-gear 2; 305-support shaft; 306-electric cylinder 1; 307-connecting rod 1; 308-connecting rod 2; 309-slider 1; 310-slider; 311-connecting rod 3; 312-connecting rod 4; 313-clamping head; 314-slider 2; 30 11-rotation slot one; 3012-rotation slot two; 3013-rotation slot three; 3014-rotation slot four; 3015-connection hole one; 3016-connection hole two; 401-motor three; 402-slide two; 403-screw two; 404-connection rod five; 405-slide three; 406-support rod; 407-spring; 408-positioning head; 409-welding unit; 410-support frame three; 501-grinding head; 601-support block; 602-electric cylinder two; 603-block. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0032] Example: Figure 1-Figure 15The device for splicing anti-corrosion pipes shown in the figure includes a base 101 and a program control component. A support frame 105 and a first linear motion component are arranged on the base 101. A plurality of centering clamping components are arranged on both sides of the support frame 105. The centering clamping components are slidably connected to the base 101. A grinding component is arranged in the support frame 105, and the grinding component is fixedly installed on the base 101. A second linear motion component is installed on the support frame 105. A positioning component and a welding component are installed on the second linear motion component. The positioning component and the welding component are spaced apart on the second linear motion component. There are two groups of components, and the two groups of positioning components are distributed on both sides of the second linear motion component respectively; the positioning components include a support rod 406 and a positioning head 408, the support rod 406 is fixedly installed on the second linear motion component, the support rod 406 is slidably connected to the support frame 105, the positioning head 408 is slidably installed on the support rod 406, and a spring 407 is connected between the support rod 406 and the positioning head 408, the two surfaces of the two positioning heads 408 that are away from each other are both arc surfaces, and the two surfaces of the two positioning heads 408 that are close to each other are planes, and the two planes coincide, and a sensor is arranged in the support rod 406.

[0033] The centering clamping assembly includes a first driving unit, a first expansion unit, and a clamping head 313. The first driving unit is slidably mounted on the base 101, the first expansion unit is mounted on the first driving unit, and the clamping head 313 is mounted on the first expansion unit; the grinding assembly includes a second driving unit, a second expansion unit, and a grinding head 501. The second driving unit is fixedly mounted on the base 101, the second expansion unit is mounted on the second driving unit, and the grinding head 501 is mounted on the second expansion unit.

[0034] The first driving unit includes a support frame 2 301, a motor 2 302, a gear 1 303, a gear 2 304, and a support shaft 305. The support frame 2 301 is installed on the base 101, the motor 2 302 is installed on the support frame 2 301, the support shaft 305 is rotatably installed on the support frame 2 301, the gear 1 303 is fixedly installed on the support shaft 305, the gear 2 304 is rotatably installed in the support frame 2 301, the gear 1 303 is arranged in the support frame 2 301, the gear 1 303 and the gear 2 304 are meshed and connected, and a circular hole is arranged on the gear 2 304.

[0035] The first expansion unit includes an electric cylinder 306, a first connecting rod mechanism, and a second connecting rod mechanism. The first connecting rod mechanism and the second connecting rod mechanism are both installed on gear 2 304. There are multiple first connecting rod mechanisms and second connecting rod mechanisms. The two second connecting rods are connected by a first connecting rod mechanism. The electric cylinder 306 is fixedly installed on gear 2 304 by a fixing rod, and the piston rod of the electric cylinder 306 is connected to the second connecting rod mechanism.

[0036] The first connecting rod mechanism includes connecting rod 2 308, slider 1 309, slide rod 310, and connecting rod 3 311. Slide rod 1 309 and slide rod 310 are both slidably installed on gear 2 304. One end of connecting rod 2 308 and connecting rod 3 311 are both slidably connected to slider 1 309. The other ends of connecting rod 2 308 and connecting rod 3 311 are respectively connected to the second connecting rod mechanism through a slide rod 310. The second connecting rod mechanism includes connecting rod 1 307, connecting rod 4 312, and slider 2 314. Slide rod 2 314 is slidably installed on gear 2 304. One end of connecting rod 1 307 and connecting rod 4 312 are both slidably connected to slider 2 314. Connecting rod 2 308 is connected to connecting rod 1 307 through a slide rod 310. Connecting rod 311 is connected to connecting rod 4 312 through another slide rod 310.

[0037] The structure of the second drive unit is the same as that of the first drive unit, and the structure of the second expansion unit is the same as that of the first expansion unit. The clamping head 313 is fixedly mounted on the slider 2 314 of the first expansion unit. There are multiple clamping heads 313, which are evenly spaced in a circular shape. The clamping head 313 is provided with an arc groove matching the size of the pipe 201. The grinding head 501 is fixedly mounted on the slider 2 314 of the second expansion unit. There are multiple grinding heads 501, which are evenly spaced in a circular shape. The support frame 2 301 on the first drive unit is slidably connected to the base 101, and the support frame 2 301 on the second drive unit is fixedly connected to the base 101. A support block 601 is fixedly mounted on the support frame 2 301 of the first drive unit, and an electric cylinder 2 602 is fixedly mounted on the support block 601. A clamping block 603 is fixedly mounted on the piston rod of the electric cylinder 2 602.

[0038] The first linear motion component includes a lead screw 102, a slide 103, and a motor 104. The motor 104 is fixedly mounted on the base 101, the lead screw 102 is rotatably mounted on the base 101, the slide 103 is slidably mounted on the base 101, the slide 103 and the lead screw 102 are connected by threads, and there are multiple slides 103. There are two groups of first linear motion components, and the two groups of first linear motion components are respectively distributed on both sides of the base 101. The slide 103 is provided with a slot matching the block 603, and sensors are provided on the motor 104 and the block 603.

[0039] The second linear motion component includes a motor three 401, a slide two 402, a screw two 403, a connecting rod five 404, and a slide three 405. The motor three 401 is fixedly mounted on the support frame one 105. The slide two 402 and the slide three 405 are both slidably mounted on the support frame one 105. The screw two 403 is rotatably mounted on the support frame one 105. The output shaft of the motor three 401 is fixedly connected to the screw two 403. The slide two 402 and the slide three 405 are both connected to the screw two 403 by threads. The slide two 402 and the slide three 405 are distributed at intervals on the support frame one 105. The support rod 406 is fixedly connected to the slide three 405 through the connecting rod five 404. Two connecting rods five 404 are provided.

[0040] The welding assembly includes a welding unit 409 and a support frame three 410 . The support frame three 410 is fixedly mounted on the slide seat two 402 . The support frame three 410 is slidably connected to the support frame one 105 . The welding unit 409 is fixedly mounted on the support frame three 410 .

[0041] The support frame 2 301 is provided with a rotating groove 1 3011, a rotating groove 2 3012, a rotating groove 3013, a rotating groove 4 3014, a connecting hole 1 3015, and a connecting hole 2 3016. The electric cylinder 1 306 is rotatably connected to the rotating groove 2 3012. The gear 2 304 is rotatably installed in the rotating groove 1 3011. The gear 2 304 is provided with a circular guide rail, which is rotatably connected to the rotating groove 3 3013. The output shaft of the motor 2 302 is rotatably connected to the connecting hole 1 3015. The support shaft 305 is rotatably connected to the connecting hole 2 3016. The gear 1 303 is arranged in the rotating groove 4 3014.

[0042] The working principle of the present invention is as follows: the plurality of gears 2 304 are installed concentrically, the arc groove on the clamping head 313 and the circular hole on the gear 2 304 are installed concentrically, the two positioning heads 408 are located on the axis of the gear 2 304, the clamping block 603 corresponds to the slot position on the slide 103, and the plurality of expansion units are in the expanded state (such as Fig.15 As shown in FIG. 1 ), the two pipes 201 to be spliced ​​are passed through the circular holes on the gear 2 304 on both sides of the support frame 1 105, and the pipes 201 are placed on the circular holes on the gear 2 304 (as shown in FIG. 1 ). Figure 1As shown), the electric cylinder 1 306 is started, the piston rod of the electric cylinder 1 306 pushes the slider 2 314, the slider 2 314 drives the connected connecting rod 1 307 and the connecting rod 4 312 to move, the connecting rod 1 307 drives the connecting rod 2 308 to move through the slide bar 310, the connecting rod 2 308 drives the slider 1 309 to move, the slider 1 309 drives the connecting rod 3 311 to move, the connecting rod 3 311 drives another connected connecting rod 4 312 to move through the slide bar 310, and so on, so that all the multiple clamping heads 313 move, the arc grooves on the multiple clamping heads 313 clamp the pipe 201, so that the pipe 201 is concentric with the circular hole on the gear 2 304, so that the pipe 201 is centered and clamped by the multiple clamping heads 313.

[0043] The electric cylinder 2 602 is started, and the piston rod of the electric cylinder 2 602 drives the block 603 to be inserted into the slot on the slide 103, the motor 104 is started, and the output shaft of the motor 104 drives the lead screw 102 to rotate, the lead screw 102 drives the block 603 to move through the slide 103, the block 603 drives the support block 601 to move through the electric cylinder 2 602, the support block 601 drives the positioning clamping assembly to move, the positioning clamping assembly drives the pipe 201 to move, and the pipe 201 passes through the circle of the gear 2 304 on the grinding assembly When the pipe 201 passes through the arc surface on the positioning head 408, the positioning head 408 is driven to move in the support rod 406, and the spring 407 is compressed. When the pipe 201 moves to the contact surface of the two positioning heads 408, the pipe 201 moves to the lowest point of the arc surface of the positioning head 408, and the positioning head 408 touches the sensor in the support rod 406. The sensor sends a signal, and the motor 104 stops moving. At this time, the pipe 201 moves to a position that is in the same straight line with the welding unit 409 in the longitudinal direction (such as Figure 4 As shown), the problem of deviation in the front and rear positions of the pipe 201 when placing the pipe 201 is solved. The problem of the pipe 201 not being centered is solved by the front centering clamping assembly, thereby realizing the function of adjusting the position of the pipe 201.

[0044] When the end faces of the two pipes 201 overlap, the motor 3 401 is started, the output shaft of the motor 3 401 drives the screw 2 403 to rotate, the screw 2 403 drives the slide 3 405 and the slide 2 402 to slide on the support frame 1 105, so that the positioning head 408 is moved away, the welding unit 409 moves to the splicing position, the motor 3 401 is turned off, the welding unit 409 and the motor 2 302 on the centering clamping assembly are started, the output shaft of the motor 2 302 drives the support shaft 305 to rotate, and the support shaft 305 is driven by the gear 1 303 drives gear two 304 to rotate, gear two 304 drives the two pipes 201 to rotate through the first expansion unit and the clamping head 313, the welding unit 409 welds the overlapping part of the two pipes 201, so as to splice the two pipes 201. After welding is completed, the motor three 401 is started to drive the slide two 402 to move the welding unit 409, and the slide three 405 drives the positioning head 408 to move, so that the positioning head 408 and the welding unit 409 are away from the splicing part of the pipe 201.

[0045] After the welded pipe 201 cools down naturally for a period of time, the first linear motion component drives the electric cylinder 2 602 to move through the clamp block 603, and the electric cylinder 2 602 drives the positioning clamping component to move through the support block 601 (the working principle of the movement refers to the previous one), so that the welding point of the two pipes 201 is moved to the position of the grinding head 501, and the second expansion unit drives the multiple grinding heads 501 to move to the welding point of the two pipes 201 (the working principle of the movement is the same as the working principle of the first expansion unit), and the output of the motor 2 302 on the grinding component The shaft drives the support shaft 305 to rotate, and the support shaft 305 drives the gear 2 304 to rotate through the gear 1 303, and the gear 2 304 drives the multiple grinding heads 501 to rotate through the second expansion unit. At this time, the pipe 201 is clamped by the positioning clamping component, and the multiple grinding heads 501 grind the welding parts when they rotate. After the grinding is completed, the two spliced ​​and polished pipes 201 are driven to move through the first linear motion component, and then the subsequent pipes 201 are spliced ​​(the principle of splicing refers to the previous one), thereby completing the splicing of multiple pipes 201.

[0046] It should be noted that the start and stop of all the above-mentioned power parts are controlled by the program control component.

Claims

1. A device for anti-corrosion pipe splicing, comprising a base (101) and a program control component, wherein a support frame (105) and a first linear motion component are arranged on the base (101), characterized in that: A plurality of centering clamping assemblies are arranged on both sides of the support frame 1 (105), and the centering clamping assemblies are slidably connected to the base (101); a grinding assembly is arranged inside the support frame 1 (105), and the grinding assembly is fixedly mounted on the base (101); a second linear motion assembly is mounted on the support frame 1 (105), and a positioning assembly and a welding assembly are mounted on the second linear motion assembly, and the positioning assembly and the welding assembly are distributed at intervals on the second linear motion assembly, and the positioning assembly is arranged in two groups, and the two groups of positioning assemblies are respectively distributed on both sides of the second linear motion assembly; the positioning assembly The component comprises a support rod (406) and a positioning head (408), wherein the support rod (406) is fixedly mounted on the second linear motion component, the support rod (406) is slidably connected to a support frame (105), the positioning head (408) is slidably mounted on the support rod (406), a spring (407) is connected between the support rod (406) and the positioning head (408), two surfaces of the two positioning heads (408) that are away from each other are both arc-shaped surfaces, and two surfaces of the two positioning heads (408) that are close to each other are planes, and the two planes overlap, and a sensor is arranged inside the support rod (406).

2. The device for anti-corrosion pipe splicing according to claim 1, characterized in that: The centering clamping assembly comprises a first driving unit, a first expansion unit, and a clamping head (313); the first driving unit is slidably mounted on the base (101); the first expansion unit is mounted on the first driving unit; and the clamping head (313) is mounted on the first expansion unit; the grinding assembly comprises a second driving unit, a second expansion unit, and a grinding head (501); the second driving unit is fixedly mounted on the base (101); the second expansion unit is mounted on the second driving unit; and the grinding head (501) is mounted on the second expansion unit.

3. The device for anti-corrosion pipe splicing according to claim 2, characterized in that: The first driving unit comprises a support frame 2 (301), a motor 2 (302), a gear 1 (303), a gear 2 (304), and a support shaft (305); the support frame 2 (301) is mounted on the base (101); the motor 2 (302) is mounted on the support frame 2 (301); the support shaft (305) is rotatably mounted on the support frame 2 (301); the gear 1 (303) is fixedly mounted on the support shaft (305); the gear 2 (304) is rotatably mounted in the support frame 2 (301); the gear 1 (303) is arranged in the support frame 2 (301); the gear 1 (303) and the gear 2 (304) are meshingly connected; and a circular hole is arranged on the gear 2 (304).

4. The device for anti-corrosion pipe splicing according to claim 3, characterized in that: The first expansion unit includes an electric cylinder 1 (306), a first connecting rod mechanism, and a second connecting rod mechanism. The first connecting rod mechanism and the second connecting rod mechanism are both installed on gear 2 (304). The first connecting rod mechanism and the second connecting rod mechanism are both provided with multiple ones. The two second connecting rod mechanisms are connected by a first connecting rod mechanism. The electric cylinder 1 (306) is fixedly installed on gear 2 (304) by a fixing rod, and the piston rod of the electric cylinder 1 (306) is connected to the second connecting rod mechanism.

5. The device for anti-corrosion pipe splicing according to claim 4, characterized in that: The first connecting rod mechanism comprises a second connecting rod (308), a slider (309), a slide bar (310), and a third connecting rod (311). The slide bar (309) and the slide bar (310) are both slidably mounted on the second gear (304). One end of the second connecting rod (308) and the third connecting rod (311) are both slidably connected to the slider (309). The other ends of the second connecting rod (308) and the third connecting rod (311) are respectively connected to the second connecting rod mechanism via a slide bar (310). The two-link mechanism comprises a connecting rod 1 (307), a connecting rod 4 (312), and a sliding block 2 (314); the sliding block 2 (314) is slidably mounted on the gear 2 (304); one end of the connecting rod 1 (307) and the connecting rod 4 (312) are both slidably connected to the sliding block 2 (314); the connecting rod 2 (308) is connected to the connecting rod 1 (307) via a sliding block (310); and the connecting rod 3 (311) is connected to the connecting rod 4 (312) via another sliding block (310).

6. The device for anti-corrosion pipe splicing according to claim 5, characterized in that: The structure of the second driving unit is the same as that of the first driving unit. The structure of the second expansion unit is the same as that of the first expansion unit. The clamping head (313) is fixedly mounted on the second slider (314) of the first expansion unit. The clamping head (313) is provided with a plurality of clamping heads (313). The plurality of clamping heads (313) are evenly spaced and distributed in a circular shape. The clamping head (313) is provided with an arc groove matching the size of the pipe (201). The grinding head (501) is fixedly mounted on the second slider (314) of the second expansion unit. A plurality of grinding heads (501) are provided, and the plurality of grinding heads (501) are evenly spaced and distributed in a circular shape; a second support frame (301) on the first drive unit is slidably connected to the base (101); a second support frame (301) on the second drive unit is fixedly connected to the base (101); a support block (601) is fixedly mounted on the second support frame (301) of the first drive unit; a second electric cylinder (602) is fixedly mounted on the support block (601); and a clamping block (603) is fixedly mounted on the piston rod of the second electric cylinder (602).

7. The device for anti-corrosion pipe splicing according to claim 6, characterized in that: The first linear motion component comprises a lead screw 1 (102), a slide 1 (103), and a motor 1 (104); the motor 1 (104) is fixedly mounted on the base (101); the lead screw 1 (102) is rotatably mounted on the base (101); the slide 1 (103) is slidably mounted on the base (101); the slide 1 (103) and the lead screw 1 (102) are connected by threads; a plurality of slides 1 (103) are provided; two groups of the first linear motion components are provided; the two groups of first linear motion components are respectively distributed on two sides of the base (101); a slot matching the clamping block (603) is provided on the slide 1 (103); and sensors are provided on both the motor 1 (104) and the clamping block (603).

8. The device for anti-corrosion pipe splicing according to claim 7, characterized in that: The second linear motion component comprises a motor three (401), a slide two (402), a lead screw two (403), a connecting rod five (404), and a slide three (405). The motor three (401) is fixedly mounted on the support frame one (105). The slide two (402) and the slide three (405) are both slidably mounted on the support frame one (105). The lead screw two (403) is rotatably mounted on the support frame one (105). The output shaft of the motor three (401) is fixedly connected to the lead screw two (403). The slide two (402) and the slide three (405) are both threadedly connected to the lead screw two (403). The slide two (402) and the slide three (405) are spaced apart on the support frame one (105). The support rod (406) is fixedly connected to the slide three (405) via the connecting rod five (404). Two connecting rods five (404) are provided.

9. The device for anti-corrosion pipe splicing according to claim 8, characterized in that: The welding assembly comprises a welding unit (409) and a support frame three (410), wherein the support frame three (410) is fixedly mounted on the slide seat two (402), the support frame three (410) is slidably connected to the support frame one (105), and the welding unit (409) is fixedly mounted on the support frame three (410).

10. The device for anti-corrosion pipe splicing according to claim 9, characterized in that: The support frame 2 (301) is provided with a rotation groove 1 (3011), a rotation groove 2 (3012), a rotation groove 3 (3013), a rotation groove 4 (3014), a connection hole 1 (3015), and a connection hole 2 (3016); the electric cylinder 1 (306) is rotationally connected to the rotation groove 2 (3012); the gear 2 (304) is rotationally installed in the rotation groove 1 (3011); a circular guide rail is provided on the gear 2 (304); the circular guide rail is rotationally connected to the rotation groove 3 (3013); the output shaft of the motor 2 (302) is rotationally connected to the connection hole 1 (3015); the support shaft (305) is rotationally connected to the connection hole 2 (3016); and the gear 1 (303) is arranged in the rotation groove 4 (3014).

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