Large-diameter plastic pipe welding device for hydraulic engineering construction

Abstract

The large-diameter plastic pipe welding device for hydraulic engineering construction comprises a bottom plate, the top face of the bottom plate is fixedly connected with a conversion frame, one side of the top face of the bottom plate is fixedly connected with a right vertical plate, and the other side of the top face of the bottom plate is fixedly connected with a left vertical plate; the switching mechanism comprises a switching motor, a rotating bottom plate, a heating plate and a cutting knife; and the cleaning mechanism comprises a cleaning motor, a hollow rotating platform, a cleaning head assembly, a cleaning shell and a cleaning base. The cutting knife is automatically switched into the heating plate through the switching mechanism, automatic extrusion welding is achieved through the moving mechanism, the integration degree of the device is improved, manual operation is replaced, safety accidents are avoided, the cleaning head assembly in the device is driven to rotate through the cleaning mechanism, the cleaning head assembly is driven to move through the moving assembly, and the welding efficiency is improved. Waste wound around the welding position of the pipe is cleaned up, and the working efficiency of welding is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipe welding devices, in particular to a large-diameter plastic pipe welding device for water conservancy project construction. Background Art

[0002] Plastic welding mainly uses the property of thermoplastics that they soften and melt after heating. The connecting parts of pipes and fittings are heated to a certain temperature by heating tools (such as hot plates, hot air guns, etc.) to activate the plastic molecular chains, and then the pipes and fittings are attached together under a certain pressure. After cooling, the plastic solidifies again, thus forming a sealed and firm connection.

[0003] The cutting knife and heating plate of traditional plastic pipe welding machines are separate. When welding the pipe, you need to manually switch and support it first, and finally manually squeeze the pipe fittings to connect. The device is not highly integrated, and there is a risk of burns during manual operation. In addition, after the cutting knife cuts the pipe welding point flat, the cut waste will be entangled on the pipe. The waste needs to be manually cleaned before using the heating plate for heating and welding, which affects the welding efficiency. Summary of the invention

[0004] The purpose of the utility model is to provide a large-diameter plastic pipe welding device for water conservancy project construction to solve the problem raised in the above-mentioned background technology that the cutting knife and the heating plate of the traditional plastic pipe welding machine are separated. When welding the pipe, it is necessary to manually switch and support it first, and finally manually squeeze and connect the pipe fittings. The integration level of the device is not high, and there is a risk of burns during manual operation. In addition, after the cutting knife cuts the pipe welding point flat, the cut waste will be entangled on the pipe. The waste needs to be manually cleaned before heating and welding with the heating plate, which affects the welding efficiency.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a large-diameter plastic pipe welding device for water conservancy project construction, comprising:

[0007] A bottom plate, the top surface of the bottom plate is fixedly connected to a conversion frame, one side of the top surface of the bottom plate is fixedly connected to a right vertical plate, and the other side of the top surface of the bottom plate is fixedly connected to a left vertical plate;

[0008] A switching mechanism, the switching mechanism comprising a switching motor, a rotating bottom plate, a heating plate and a cutting knife;

[0009] A cleaning mechanism, wherein the cleaning mechanism has two parts, and the cleaning mechanism comprises a cleaning motor, a hollow rotating platform, a cleaning head assembly, a cleaning shell and a cleaning base;

[0010] The switching motor is fixedly connected to the side of the conversion frame, the middle of the rotating bottom plate is fixedly connected to the power output end of the switching motor, the heating plate is fixedly connected to one end of the rotating bottom plate, and the cutting knife is fixedly connected to the other end of the rotating bottom plate;

[0011] The hollow rotating platform is fixed on the cleaning shell, the cleaning motor is fixedly connected to the hollow rotating platform, the power output end of the cleaning motor is fixed to the power input end of the hollow rotating platform, the cleaning head assembly includes a rotating circular plate, the rotating circular plate is rotatably connected to the inner cavity of the cleaning shell, the side of the rotating circular plate is fixedly connected to the power output end of the hollow rotating platform, and the cleaning base is fixedly connected to the bottom of the cleaning shell.

[0012] Furthermore, the cleaning head assembly also includes a cleaning bevel block, a square hole, a limit plate, a guide column and a spring;

[0013] The cleaning shell is provided with a square hole, and there are multiple square holes. The limit plate is slidably connected in the square hole, the cleaning bevel is fixedly connected to the bottom surface of the limit plate, and the cleaning bevel passes through the inner ring of the rotating circular plate. The guide column is fixedly connected to the top surface of the limit plate, and the guide column passes through the outer ring of the rotating circular plate. One end of the spring is fixedly connected to the side of the limit plate, and the other end of the spring is fixed to the inner wall of the square hole, and the guide column passes through the spring.

[0014] Furthermore, it also includes a moving mechanism, which includes a first motor, a first screw rod, a guide rod, a second motor and a second screw rod;

[0015] The first motor is fixed to the side of the right vertical plate, the threads at both ends of the first screw and the second screw are opposite, the first screw is fixedly connected to the power output end of the first motor, one end of the guide rod is fixedly connected to the right vertical plate, and the other end of the guide rod is fixedly connected to the left vertical plate, there are two guide rods, the second motor is fixed to the side of the left vertical plate, the second screw is fixedly connected to the power output end of the second motor, and the second motor and both ends of the first screw are rotatably connected to the right vertical plate and the left vertical plate respectively.

[0016] Furthermore, a threaded hole is provided in the middle of the cleaning base, sliding holes are provided on both sides of the cleaning base, the threaded hole is threadedly connected to the second screw rod, and the sliding hole is slidably connected to the guide rod.

[0017] Furthermore, it also includes a clamping mechanism, wherein there are two clamping mechanisms, and the clamping mechanism includes a first frame, a clamping motor, a driving screw, an upper clamping plate, a lower clamping plate, a transmission assembly, a driven screw, a cross bar and a second frame;

[0018] The four corners of the first frame are fixedly connected to the cross bar, and the other end of the cross bar is fixedly connected to the second frame, the threads of the active screw and the driven screw are in opposite directions, the active screw is rotatably connected to the side wall of the first frame, and the driven screw is rotatably connected to the side wall of the second frame, the clamping motor is fixedly connected to the top surface of the first frame, and the power output end of the clamping motor is fixedly connected to the active screw, the side wall of the first frame is symmetrically provided with a first vertical groove, the upper clamping plate has two, and the two ends of one of the upper clamping plates slide in the first vertical groove, one end of the upper clamping plate is fixedly connected to an upper threaded plate, the upper threaded plate is threadedly connected to the active screw, the lower clamping plate has two, and the two ends of one of the lower clamping plates slide in the first vertical groove, The axial piston rod of the said first sliding plate is connected with the guide rail of the said second sliding plate, and the axial piston rod of the said second sliding plate is connected with the guide rail of the said second sliding plate.

[0019] Furthermore, it is characterized in that the transmission assembly includes a driving wheel, a transmission belt and a driven wheel;

[0020] The driving wheel is fixed at the bottom end of the driving screw, one end of the transmission belt is rotatably connected to the driving wheel, the other end of the transmission belt is rotatably connected to the driven wheel, and the driven wheel is fixed at the bottom end of the driven screw.

[0021] Furthermore, the bottom surface of the base plate is fixedly connected with universal wheels, and there are four universal wheels.

[0022] Compared with the prior art, the utility model has the advantage that when the pipe welding part is cut smoothly by the cutting knife, the cutting knife is automatically switched to the heating plate through the switching mechanism, and the welding is automatically extruded through the moving mechanism, thereby improving the integration of the device and replacing manual operation to avoid safety accidents.

[0023] Based on the above beneficial effects, after the cutting knife cuts, the cleaning mechanism drives the internal cleaning head assembly to rotate, and the moving assembly drives it to move, so as to clean up the waste material wrapped around the pipe welding place and improve the welding work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a first overall structural schematic diagram of the utility model;

[0026] Figure 2 It is a second overall structural schematic diagram of the utility model;

[0027] Figure 3 For this utility model Figure 2 Schematic diagram of the structure of part A in FIG.

[0028] Figure 4 This is a schematic diagram of the cleaning mechanism structure of the utility model;

[0029] Figure 5 This is a schematic diagram of the cleaning head assembly structure of the utility model.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 100, bottom plate; 110, universal wheel; 120, conversion frame; 130, right vertical plate; 140, left vertical plate;

[0032] 200, switching mechanism; 210, switching motor; 220, rotating bottom plate; 230, heating plate; 240, cutting knife;

[0033] 300, clamping mechanism; 310, first frame; 311, first vertical slot; 312, first sliding bottom plate; 320, clamping motor; 330, active screw; 340, upper clamping plate; 341, upper threaded plate; 350, lower clamping plate; 351, lower threaded plate; 360, transmission assembly; 361, active wheel; 362, transmission belt; 363, driven wheel; 370, driven screw; 380, cross bar; 390, second frame; 391, second vertical slot; 392, second sliding bottom plate;

[0034] 400, cleaning mechanism; 410, cleaning motor; 420, hollow rotating platform; 430, cleaning head assembly; 431, rotating circular plate; 432, cleaning inclined block; 433, square hole; 434, limit plate; 435, guide column; 436, spring; 440, cleaning housing; 450, cleaning base; 451, threaded hole; 452, sliding hole;

[0035] 500, moving mechanism; 510, first motor; 520, first screw; 530, guide rod; 540, second motor; 550, second screw. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0038] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1-5 As shown, this embodiment is a large-diameter plastic pipe welding device for water conservancy project construction, comprising:

[0040] A bottom plate 100, a conversion frame 120 is fixedly connected to the top surface of the bottom plate 100, a right vertical plate 130 is fixedly connected to one side of the top surface of the bottom plate 100, and a left vertical plate 140 is fixedly connected to the other side of the top surface of the bottom plate 100;

[0041] The switching mechanism 200 includes a switching motor 210, a rotating bottom plate 220, a heating plate 230 and a cutting blade 240;

[0042] The switching motor 210 is fixedly connected to the side of the conversion frame 120, the middle of the rotating bottom plate 220 is fixedly connected to the power output end of the switching motor 210, the heating plate 230 is fixedly connected to one end of the rotating bottom plate 220, and the cutting knife 240 is fixedly connected to the other end of the rotating bottom plate 220. The switching motor 210 is started, and the switching motor 210 drives the rotating bottom plate 220 to rotate, and the rotating bottom plate 220 drives the heating plates 230 and the cutting knife 240 at both ends to revolve, thereby achieving the purpose of switching;

[0043] The moving mechanism 500 includes a first motor 510, a first screw rod 520, a guide rod 530, a second motor 540 and a second screw rod 550;

[0044] The first motor 510 is fixed to the side of the right vertical plate 130, the threads of the active screw 330 and the driven screw 370 at both ends are opposite, the first screw 520 is fixedly connected to the power output end of the first motor 510, one end of the guide rod 530 is fixedly connected to the right vertical plate 130, and the other end of the guide rod 530 is fixedly connected to the left vertical plate 140, there are two guide rods 530, the second motor 540 is fixed to the side of the left vertical plate 140, the second screw 550 is fixedly connected to the power output end of the second motor 540, the second motor 540 and the two ends of the first screw 520 are rotatably connected to the right vertical plate 130 and the left vertical plate 140 respectively, the first motor 510 is started, the first motor 510 drives the first screw 520 to rotate, the second motor 540 is started, and the second motor 540 drives the second screw 550 to rotate;

[0045] The clamping mechanism 300 has two clamping mechanisms 300, and the clamping mechanism 300 includes a first frame 310, a clamping motor 320, a driving screw 330, an upper clamping plate 340, a lower clamping plate 350, a transmission assembly 360, a driven screw 370, a cross bar 380 and a second frame 390;

[0046] The four corners of the first frame 310 are fixedly connected to the cross bar 380, and the other end of the cross bar 380 is fixedly connected to the second frame 390. The threads at both ends of the first screw 520 and the second screw 550 are opposite. The active screw 330 is rotatably connected to the side wall of the first frame 310, and the driven screw 370 is rotatably connected to the side wall of the second frame 390. The clamping motor 320 is fixedly connected to the top surface of the first frame 310, and the power output end of the clamping motor 320 is fixedly connected to the active screw 330. The side wall of the first frame 310 is symmetrically provided with a first vertical groove 311, and there are two upper clamping plates 340. Both ends of an upper clamping plate 340 slide in the first vertical groove 311, and one end of the upper clamping plate 340 is fixedly connected to an upper threaded plate 341. The threaded plate 341 is threadedly connected to the active screw rod 330, and there are two lower clamping plates 350. The two ends of one lower clamping plate 350 slide in the first vertical groove 311, and one end of the lower clamping plate 350 is fixedly connected to the lower threaded plate 351, and the lower threaded plate 351 is threadedly connected to the active screw rod 330. The side wall of the second frame 390 is symmetrically provided with a second vertical groove 391, and the two ends of the other upper clamping plate 340 slide in the second vertical groove 391. The other upper threaded plate 341 is threadedly connected to the driven screw rod 370, and the two ends of the other lower clamping plate 350 slide in the second vertical groove 391. The other lower threaded plate 351 is threadedly connected to the driven screw rod 370. The active screw rod 330 drives the driven screw rod 370 to rotate through the transmission assembly 360. A first sliding bottom plate 312 is fixedly connected to the bottom of a frame 310, and the middle of the first sliding bottom plate 312 is threadedly connected to the first screw rod 520, and the two sides of the first sliding bottom plate 312 are slidably connected to the guide rod 530. A second sliding bottom plate 392 is fixedly connected to the bottom of the second frame 390, and the two sides of the second sliding bottom plate 392 are slidably connected to the guide rod 530. Two pipes are respectively placed in two clamping mechanisms 300, and the clamping motor 320 is started. The clamping motor 320 drives the active screw rod 330 to rotate. The thread directions of the upper and lower ends of the active screw rod 330 are opposite. Under the action of the thread, the active screw 330 drives the upper thread plate 341 and the lower thread plate 351 to approach each other, and the upper thread plate 341 and the lower thread plate 351 are respectively driven to move closer. 51 respectively drives the upper clamping plate 340 and the lower clamping plate 350 to move and clamp the pipe, the active screw 330 drives the driven screw 370 to rotate through the transmission assembly 360, and the driven screw 370 drives another upper threaded plate 341 and another lower threaded plate 351 to approach each other under the action of the thread, and the other upper threaded plate 341 and the other lower threaded plate 351 respectively drive another upper clamping plate 340 and another lower clamping plate 350 to move and clamp another pipe, the first screw 520 rotates to make the first sliding bottom plate 312 move under the action of the thread, the first sliding bottom plate 312 drives the first frame 310 to move, the first frame 310 drives the cross bar 380 to move, and the cross bar 380 drives the second frame 390 to move at the same time;

[0047] The transmission assembly 360 includes a driving wheel 361, a transmission belt 362 and a driven wheel 363;

[0048] The driving wheel 361 is fixed to the bottom end of the driving screw 330, one end of the transmission belt 362 is rotatably connected to the driving wheel 361, the other end of the transmission belt 362 is rotatably connected to the driven wheel 363, the driven wheel 363 is fixed to the bottom end of the driven screw 370, the driving screw 330 drives the driving wheel 361 to rotate, the driving wheel 361 drives the transmission belt 362 to rotate, the transmission belt 362 drives the driven wheel 363 to rotate, and the driven wheel 363 drives the driven screw 370 to rotate;

[0049] Working principle: Put two pipes to be welded into two clamping mechanisms 300 respectively, start the clamping motor 320, the clamping motor 320 drives the active screw 330 to rotate, the thread directions of the upper and lower ends of the active screw 330 are opposite, the active screw 330 drives the upper thread plate 341 and the lower thread plate 351 to approach each other under the action of the thread, the upper thread plate 341 and the lower thread plate 351 respectively drive the upper clamping plate 340 and the lower clamping plate 350 to move to clamp the pipe, and the active screw 3 30 drives the driving wheel 361 to rotate, the driving wheel 361 drives the transmission belt 362 to rotate, the transmission belt 362 drives the driven wheel 363 to rotate, the driven wheel 363 drives the driven screw 370 to rotate, the driven screw 370 drives another upper threaded plate 341 and another lower threaded plate 351 to approach each other under the action of the thread, and the other upper threaded plate 341 and another lower threaded plate 351 respectively drive another upper clamping plate 340 and another lower clamping plate 350 to move to clamp another pipe;

[0050] Then, the switching motor 210 is started, and the switching motor 210 drives the rotating base plate 220 to rotate. The rotating base plate 220 first rotates the cutting knife 240 to the welding position, and the first motor 510 is started. The first motor 510 drives the first screw 520 to rotate. The first screw 520 rotates to make the first sliding base plate 312 move under the action of the thread. The first sliding base plate 312 drives the first frame 310 to move. The first frame 310 drives the cross bar 380 to move. The cross bar 380 drives the second frame 390 to move at the same time. The threads at both ends of the first screw 520 are opposite, thereby driving the two clamping mechanisms 300 to approach each other. The two clamping mechanisms 300 approach each other so that the welding position of the two pipes contacts the two sides of the cutting knife 240 and The cutting knife 240 is started for cutting. After the cutting is smooth, the first motor 510 is reversed to drive the first screw 520 to reverse so that the two clamping mechanisms 300 are moved away, and the two pipes are separated from the cutting knife 240. The switching motor 210 is started to drive the rotating base plate 220 to rotate. The rotating base plate 220 rotates to switch the heating plate 230 to the welding position. Similarly, the first motor 510 is started to make the two pipes contact with both sides of the heating plate. After heating is completed, the first motor 510 is started to reverse to separate the pipes from the heating plate. The switching motor 210 is started again so that the rotating base plate 220 drives the heating plate 230 and the cutting knife 240 to be in a horizontal position. Finally, the first motor 510 is started to make the heated positions of the two pipes contact and continue to be close to be squeezed and welded together.

[0051] In this step, after the pipe welding part is cut smoothly by the cutting knife 240, the cutting knife 240 is automatically switched to the heating plate 230 through the switching mechanism 200, and the welding is automatically extruded through the moving mechanism 500, thereby improving the integration of the device and replacing manual operation to avoid safety accidents.

[0052] See also Figure 1-5 As shown, this embodiment is based on the above structure and further includes a cleaning mechanism 400. There are two cleaning mechanisms 400. The cleaning mechanism 400 includes a cleaning motor 410, a hollow rotating platform 420, a cleaning head assembly 430, a cleaning shell 440 and a cleaning base 450.

[0053] The hollow rotating platform 420 is fixed on the cleaning shell 440, the cleaning motor 410 is fixedly connected to the hollow rotating platform 420, the power output end of the cleaning motor 410 is fixed to the power input end of the hollow rotating platform 420, the cleaning head assembly 430 includes a rotating circular plate 431, the rotating circular plate 431 is rotatably connected to the inner cavity of the cleaning shell 440, the side of the rotating circular plate 431 is fixedly connected to the power output end of the hollow rotating platform 420, the cleaning base 450 is fixedly connected to the bottom of the cleaning shell 440, the cleaning motor 410 is started, the cleaning motor 410 drives the hollow rotating platform 420 to rotate, and the hollow rotating platform 420 drives the rotating circular plate 431 to rotate;

[0054] The cleaning head assembly 430 also includes a cleaning inclined block 432, a square hole 433, a limit plate 434, a guide post 435 and a spring 436;

[0055] The cleaning shell 440 is provided with a square hole 433, and there are multiple square holes 433. The limiting plate 434 is slidably connected in the square hole 433. The cleaning inclined block 432 is fixedly connected to the bottom surface of the limiting plate 434. The cleaning inclined block 432 passes through the inner ring of the rotating circular plate 431. The guide column 435 is fixedly connected to the top surface of the limiting plate 434. The guide column 435 passes through the outer ring of the rotating circular plate 431. One end of the spring 436 is fixedly connected to the side of the limiting plate 434, and the other end of the spring 436 is fixed to the inner wall of the square hole 433. The guide column 435 passes through the spring 436. When the pipe is inserted, the pipe contacts the inclined surface of the cleaning inclined block 432 and squeezes the cleaning inclined block 432 into the square hole 433 and compresses the guide column 435, so that the pipe wall is in close contact with the cleaning inclined block 432. The rotating circular plate 431 rotates to drive the cleaning inclined block 432 to rotate;

[0056] A threaded hole 451 is provided in the middle of the cleaning base 450, and sliding holes 452 are provided on both sides of the cleaning base 450. The threaded hole 451 is threadedly connected to the second screw rod 550, and the sliding hole 452 is slidably connected to the guide rod 530. The second motor 540 is started to drive the second screw rod 550 to rotate. The threads at both ends of the second screw rod 550 are opposite. The second screw rod 550 rotates to make the two cleaning bases 450 move closer to each other under the action of the threads, so as to clean up the cut waste.

[0057] The bottom surface of the base plate 100 is fixedly connected with universal wheels 110, and there are four universal wheels 110 to facilitate the movement of the device;

[0058] Working principle: insert the pipe into the cleaning mechanism 400, the pipe contacts the inclined surface of the cleaning inclined block 432 and squeezes the cleaning inclined block 432 into the square hole 433 and compresses the guide column 435, so that the pipe wall is in close contact with the cleaning inclined block 432. When the cutting knife completes the cutting, start the cleaning motor 410, the cleaning motor 410 drives the hollow rotating platform 420 to rotate, the hollow rotating platform 420 drives the rotating circular plate 431 to rotate, and the rotating circular plate 431 drives the cleaning inclined block 432 to rotate. At the same time, start the second motor 540 to drive the second screw 550 to rotate. The threads at both ends of the second screw 550 are reversed. The second screw 550 rotates to make the two cleaning bases 450 move closer under the action of the threads to clean up the cut waste. When the second motor 540 is reversed, it drives the second screw 550 to reverse. The second screw 550 reverses to make the two cleaning bases 450 move away from each other, exposing the welding part of the pipe, and then heat welding is performed;

[0059] In this step, after the cutting knife 240 has cut, the cleaning mechanism 400 drives the internal cleaning head assembly 430 to rotate, and the moving assembly 500 drives it to move, so as to clean the waste materials wrapped around the pipe welding place, thereby improving the welding work efficiency.

[0060] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A large-diameter plastic pipe welding device for water conservancy project construction, characterized in that: include: A bottom plate (100), the top surface of the bottom plate (100) being fixedly connected to a conversion frame (120), one side of the top surface of the bottom plate (100) being fixedly connected to a right vertical plate (130), and the other side of the top surface of the bottom plate (100) being fixedly connected to a left vertical plate (140); A switching mechanism (200), the switching mechanism (200) comprising a switching motor (210), a rotating bottom plate (220), a heating plate (230) and a cutting knife (240); A cleaning mechanism (400), wherein there are two cleaning mechanisms (400), and the cleaning mechanism (400) comprises a cleaning motor (410), a hollow rotating platform (420), a cleaning head assembly (430), a cleaning housing (440) and a cleaning base (450); The switching motor (210) is fixedly connected to a side surface of the conversion frame (120), the middle of the rotating base plate (220) is fixedly connected to a power output end of the switching motor (210), the heating plate (230) is fixedly connected to one end of the rotating base plate (220), and the cutting knife (240) is fixedly connected to the other end of the rotating base plate (220); The hollow rotating platform (420) is fixed on the cleaning shell (440), the cleaning motor (410) is fixedly connected to the hollow rotating platform (420), the power output end of the cleaning motor (410) is fixed to the power input end of the hollow rotating platform (420), the cleaning head assembly (430) comprises a rotating circular plate (431), the rotating circular plate (431) is rotatably connected to the inner cavity of the cleaning shell (440), the side surface of the rotating circular plate (431) is fixedly connected to the power output end of the hollow rotating platform (420), and the cleaning base (450) is fixedly connected to the bottom of the cleaning shell (440).

2. A large-diameter plastic pipe welding device for water conservancy project construction according to claim 1, characterized in that: The cleaning head assembly (430) further comprises a cleaning inclined block (432), a square hole (433), a limiting plate (434), a guide column (435) and a spring (436); The cleaning housing (440) is provided with a square hole (433), wherein there are a plurality of square holes (433); the limiting plate (434) is slidably connected in the square hole (433); the cleaning inclined block (432) is fixedly connected to the bottom surface of the limiting plate (434); the cleaning inclined block (432) passes through the inner ring of the rotating circular plate (431); the guide column (435) is fixedly connected to the top surface of the limiting plate (434); the guide column (435) passes through the outer ring of the rotating circular plate (431); one end of the spring (436) is fixedly connected to the side surface of the limiting plate (434); the other end of the spring (436) is fixedly connected to the inner wall of the square hole (433); and the guide column (435) passes through the spring (436).

3. A large-diameter plastic pipe welding device for water conservancy project construction according to claim 1, characterized in that: It also includes a moving mechanism (500), wherein the moving mechanism (500) includes a first motor (510), a first screw rod (520), a guide rod (530), a second motor (540), and a second screw rod (550); The first motor (510) is fixed to the side of the right vertical plate (130); the threads at both ends of the first screw rod (520) and the second screw rod (550) are in opposite directions; the first screw rod (520) is fixedly connected to the power output end of the first motor (510); one end of the guide rod (530) is fixedly connected to the right vertical plate (130); the other end of the guide rod (530) is fixedly connected to the left vertical plate (140); there are two guide rods (530); the second motor (540) is fixed to the side of the left vertical plate (140); the second screw rod (550) is fixedly connected to the power output end of the second motor (540); and the second motor (540) and the first screw rod (520) are rotatably connected to the right vertical plate (130) and the left vertical plate (140) at both ends.

4. A large-diameter plastic pipe welding device for water conservancy project construction according to claim 3, characterized in that: A threaded hole (451) is provided in the middle of the cleaning base (450), sliding holes (452) are provided on both sides of the cleaning base (450), the threaded hole (451) is threadedly connected to the second screw rod (550), and the sliding hole (452) is slidably connected to the guide rod (530).

5. A large-diameter plastic pipe welding device for water conservancy project construction according to claim 3, characterized in that: It also includes a clamping mechanism (300), wherein there are two clamping mechanisms (300), and the clamping mechanism (300) includes a first frame (310), a clamping motor (320), a driving screw (330), an upper clamping plate (340), a lower clamping plate (350), a transmission assembly (360), a driven screw (370), a crossbar (380) and a second frame (390); The four corners of the first frame (310) are fixedly connected to the cross bar (380), and the other end of the cross bar (380) is fixedly connected to the second frame (390). The threads at both ends of the active screw (330) and the driven screw (370) are opposite. The active screw (330) is rotatably connected to the side wall of the first frame (310), and the driven screw (370) is rotatably connected to the side wall of the second frame (390). The clamping motor (320) is fixedly connected to the top surface of the first frame (310), and the power output of the clamping motor (320) is The first frame (310) has two upper clamping plates (340), one of which has two ends sliding in the first vertical groove (311), one end of the upper clamping plate (340) is fixedly connected to an upper threaded plate (341), and the upper threaded plate (341) is threadedly connected to the active screw rod (330), and the first frame (310) has two lower clamping plates (350), one of which has two ends sliding in the first vertical groove (311), and the lower clamping plate (350) has two ends sliding in the first vertical groove (311). One end of the second frame (390) is fixedly connected to a lower threaded plate (351), the lower threaded plate (351) is threadedly connected to the active screw rod (330), the side wall of the second frame (390) is symmetrically provided with a second vertical groove (391), the two ends of the other upper clamping plate (340) slide in the second vertical groove (391), the other upper threaded plate (341) is threadedly connected to the driven screw rod (370), the two ends of the other lower clamping plate (350) slide in the second vertical groove (391), the other lower threaded plate (351) is threadedly connected to the driven screw rod (370), The active screw rod (330) drives the driven screw rod (370) to rotate through the transmission assembly (360); the first frame (310) is fixedly connected to a first sliding base plate (312) at the bottom; the first sliding base plate (312) is threadedly connected to the first screw rod (520) in the middle; the first sliding base plate (312) is slidably connected to the guide rod (530) at both sides; the second frame (390) is fixedly connected to a second sliding base plate (392) at the bottom; the second sliding base plate (392) is slidably connected to the guide rod (530) at both sides.

6. A large-diameter plastic pipe welding device for water conservancy project construction according to claim 5, characterized in that: The transmission assembly (360) comprises a driving wheel (361), a transmission belt (362) and a driven wheel (363); The driving wheel (361) is fixed to the bottom end of the driving screw (330), one end of the transmission belt (362) is rotationally connected to the driving wheel (361), the other end of the transmission belt (362) is rotationally connected to the driven wheel (363), and the driven wheel (363) is fixed to the bottom end of the driven screw (370).

7. A large-diameter plastic pipe welding device for water conservancy project construction according to claim 6, characterized in that: The bottom surface of the base plate (100) is fixedly connected with universal wheels (110), and there are four universal wheels (110).

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