Pretreatment processing device for spiral welded pipe of municipal rain sewage pipe

Abstract

The invention relates to the field of spiral welded pipe machining, in particular to a spiral welded pipe pretreatment machining device for municipal rainwater and sewage pipes. The invention discloses a spiral welded pipe pretreatment processing device for a municipal rain sewage pipe. The spiral welded pipe pretreatment processing device comprises a base, a mounting frame and the like, and the base is fixedly connected with a mounting frame. Floating dust on the surface of strip steel is cleaned through the high-pressure pneumatic nozzles, then the spiral lines are additionally arranged on the rolling shafts, alternating current is conducted on the spiral lines, the strip steel can be demagnetized, dust impurities on the strip steel are removed through static accumulation of the silica gel cushion layers of the rolling shafts in the rolling process and the silica gel cushion layers with the micro-pyramid arrays arranged on the surfaces of the rolling shafts, and therefore the strip steel can be demagnetized. Deep cleaning of the strip steel is achieved, the rolling shafts are pressed on the surface of the strip steel through the spring rods, vibration of the strip steel is absorbed by the damping effect of the spring rods, the welding quality problem caused by vibration of the strip steel is avoided, and the welding quality of the spiral welded pipe body is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the field of spiral welded pipe processing, in particular to a spiral welded pipe pretreatment processing device used for municipal rainwater and sewage pipes. Background Art

[0002] Spiral welded pipe is made by rolling the strip steel into a pipe blank at a certain spiral angle and then welding the pipe seams. Due to its excellent crack resistance and weather resistance, it is widely used in oil or natural gas pipelines, as well as water pipes for municipal rainwater and sewage buried deep underground.

[0003] Since the spiral welded pipe is made by rolling the strip steel at a spiral angle, the strip steel used to make the spiral welded pipe is mainly low-carbon steel. This type of material itself is ferromagnetic, and dust impurities, metal debris, etc. in the air will adhere to the surface of the strip steel. The presence of dust impurities causes pores in the weld, affecting the welding quality. In addition, during the process of blowing and dust removal of the strip steel, the blowing process will also cause the strip steel to vibrate, and the spiral angle of the weld will fluctuate, resulting in uneven weld gaps, affecting the welding quality. Summary of the invention

[0004] In order to overcome the problem that dust impurities, metal debris and the like adhere to the surface of the steel strip and affect the welding quality, the steel strip generally vibrates during the air blowing and dust removal process, the welding spiral angle fluctuates, and the weld gap is uneven. The present invention provides a spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes.

[0005] The technical scheme is as follows: A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes includes a base and a mounting frame; the base is fixedly connected to the mounting frame; it also includes a power unit, a first air pipe, a high-pressure pneumatic nozzle, a spring rod, a straight suspension beam, a roller, a spiral and a conductive ring; the mounting frame is connected to two power units; each power unit is connected to a first air pipe; each first air pipe is installed with a number of high-pressure pneumatic nozzles equidistantly distributed on the left and right; each power unit is connected to two spring rods; two straight suspension beams are arranged between the two power units; each straight suspension beam is fixedly connected to the corresponding spring rod; a number of rollers are rotatably connected between the two straight suspension beams at the same horizontal position; a detachable silicone pad is applied on the surface of the roller; a spiral is wound around the surface of each roller; the spiral is an electrical conductor; a number of conductive rings are installed in each straight suspension beam; two conductive rings corresponding to the left and right at the same horizontal position are electrically connected to a spiral together; each conductive ring is connected to a terminal.

[0006] Optionally, the power unit includes an electric actuator, an I-shaped frame and an L-shaped suspension beam; a plurality of electric actuators are installed on the upper and lower parts of the mounting frame; all the telescopic parts of the electric actuators on the upper part are fixedly connected to an I-shaped frame; all the telescopic parts of the electric actuators on the lower part are fixedly connected to another I-shaped frame; the left and right parts of each I-shaped frame are respectively connected to two spring rods; two straight suspension beams are located between the two I-shaped frames; each I-shaped frame is fixedly connected to two L-shaped suspension beams distributed on the left and right; all the L-shaped suspension beams on each I-shaped frame are commonly connected to a first air pipe.

[0007] Optionally, the silicone cushion surface of the roller has an array of micro-pyramids.

[0008] Optionally, the number of turns of the spiral on the roller decreases gradually from front to back.

[0009] Optionally, the winding directions of the spirals on the two adjacent rollers are opposite, and the winding directions of the spirals on the two corresponding rollers above and below are also opposite.

[0010] Optionally, it also includes a dust box and a second air pipe; a plurality of dust boxes are fixedly connected between every two straight suspension beams at the same horizontal position; all dust boxes at the same horizontal position are connected to the second air pipe; each dust box corresponds to a roller position.

[0011] Optionally, a diverter box is also included; all L-shaped cantilever beams on each I-shaped frame are fixedly connected to a diverter box; each diverter box is connected to a first air pipe; the opposite sides of each diverter box are connected to corresponding high-pressure pneumatic nozzles; an electric heating plate is arranged in the diverter box.

[0012] Optionally, it also includes a shunt pipe and a confluence pipe; the roller is a hollow tube; the right ends of all rollers at the same horizontal position are connected to a shunt pipe; the left ends of all rollers at the same horizontal position are connected to a confluence pipe.

[0013] Optionally, it also includes a cooling box, a first water pipe, a pump, a second water pipe and a semiconductor radiator; two L-shaped cantilever beams at the same horizontal position are fixedly connected to a cooling box; the front of each cooling box is fixedly connected to a diversion box; each manifold is connected to a first water pipe; each first water pipe passes through a cooling box; each cooling box is equipped with a pump; each pump input end is connected to a first water pipe; each pump output end is connected to a second water pipe; each second water pipe is connected to a diversion pipe; each cooling box is equipped with a number of semiconductor radiators; the P-type and N-type semiconductors of the semiconductor radiator serve as the cold end and the hot end respectively; the semiconductor radiator is used to cool the heat transfer fluid in the cooling box.

[0014] Optionally, a heat conducting sheet is also included; all semiconductor heat sinks at the same horizontal position are fixedly connected to the shunt box via heat conducting rods; a number of heat conducting sheets are fixedly connected between adjacent heat conducting rods; and all the heat conducting sheets are located in the shunt box.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention uses a high-pressure pneumatic nozzle to clean the floating dust on the surface of the steel strip, and then adds a spiral on the roller and passes alternating current to it, so as to demagnetize the steel strip, and then utilizes the static electricity accumulation of the silicone cushion layer of the roller during the rolling process and the silicone cushion layer with a micro-pyramid array on the surface of the roller to remove dust and impurities on the steel strip, thereby achieving deep cleaning of the steel strip, and utilizes the spring rod to press the roller against the surface of the steel strip, and the vibration of the steel strip is absorbed by the damping effect of the spring rod, thereby avoiding welding quality problems caused by the vibration of the steel strip, and effectively ensuring the welding quality of the spiral welded pipe body.

[0016] 2. By introducing heat transfer fluid into the roller, the heat generated by the spiral can be conducted away by the heat transfer fluid flowing in the roller, thereby maintaining the temperature of the spiral stable, ensuring the demagnetization process continues, ensuring the demagnetization efficiency and demagnetization effect, and at the same time, the heat generated is also conducted to the cooling box through the heat transfer fluid, realizing the utilization of waste heat, which is used to preheat the strip and save energy resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the installation position of the strip steel of the present invention; Figure 3 It is a schematic diagram of the roller installation position of the present invention; Figure 4 It is a schematic diagram of the installation position of the conductive ring of the present invention; Figure 5 It is a schematic diagram of the internal structure of the cooling box of the present invention; Figure 6 It is a schematic diagram of the internal structure of the diverter box of the present invention.

[0018] Markings in the accompanying drawings: 111-strip steel, 222-spiral welded pipe body, 1-base, 2-mounting frame, 3-electric actuator, 4-I-shaped frame, 5-L-shaped suspension beam, 6-diversion box, 7-first air pipe, 8-high-pressure pneumatic nozzle, 9-spring rod, 10-straight suspension beam, 11-roller, 12-diversion pipe, 13-collector, 14-spiral, 15-conductive ring, 16-cooling box, 17-first water pipe, 18-pump, 19-second water pipe, 20-semiconductor radiator, 21-heat conductive sheet, 101-dust box, 102-second air pipe. DETAILED DESCRIPTION

[0019] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

[0020] Embodiment 1 A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes, according to Figure 1-Figure 6 As shown, it includes a base 1 and a mounting frame 2; the mounting frame 2 is bolted to the middle of the base 1; It also includes a power unit, a first air pipe 7, a high-pressure pneumatic nozzle 8, a spring rod 9, a straight suspension beam 10, a roller 11, a spiral 14 and a conductive ring 15; the mounting frame 2 is connected to two power units symmetrically distributed up and down; each power unit is connected to a first air pipe 7; each first air pipe 7 is installed with a number of high-pressure pneumatic nozzles 8 equidistantly distributed on the left and right; each power unit is connected to two spring rods 9; two straight suspension beams 10 are arranged between the two power units; each straight suspension beam 10 is fixedly connected to the corresponding spring rod 9; four rollers 11 distributed front and back are rotatably connected between the two straight suspension beams 10 at the same horizontal position; a detachable silicone pad is applied on the surface of the roller 11; a spiral 14 is wound around the surface of each roller 11; the spiral 14 is an electrical conductor; four equidistantly distributed conductive rings 15 are installed in each straight suspension beam 10; two conductive rings 15 corresponding to the left and right at the same horizontal position are electrically connected to a spiral 14; each conductive ring 15 is connected to a terminal.

[0021] The power unit includes an electric actuator 3, an I-shaped frame 4 and an L-shaped suspension beam 5; two electric actuators 3 are respectively installed on the upper and lower parts of the mounting frame 2; the electric actuator 3 is an electric push rod; the telescopic parts of all the electric actuators 3 on the upper part are commonly fixedly connected to an I-shaped frame 4; the telescopic parts of all the electric actuators 3 on the lower part are commonly fixedly connected to another I-shaped frame 4; the left and right parts of each I-shaped frame 4 are respectively connected to two spring rods 9; two straight suspension beams 10 are located between the two I-shaped frames 4; each I-shaped frame 4 is respectively fixedly connected to two L-shaped suspension beams 5 distributed on the left and right; all the L-shaped suspension beams 5 on each I-shaped frame 4 are commonly connected to a first air pipe 7.

[0022] The surface of the silicone pad layer of the roller 11 is provided with a micro-pyramid array. The concave-convex surface formed by the micro-pyramid array can capture dust particles on the surface of the steel strip 111 when it contacts the steel strip 111 .

[0023] From front to back, the number of turns of the spiral wire 14 on the roller 11 decreases gradually, so as to generate a gradually weakening electromagnetic field.

[0024] The winding directions of the spirals 14 on the two adjacent rollers 11 are opposite, and the winding directions of the spirals 14 on the two corresponding rollers 11 are also opposite, which is used to form a disordered magnetic field, disrupt the arrangement of magnetic domains on the strip 111, and eliminate the magnetism of the strip 111.

[0025] It also includes a dust box 101 and a second air pipe 102; four dust boxes 101 equidistantly distributed front and back are welded between every two straight suspension beams 10 at the same horizontal position; all dust boxes 101 at the same horizontal position are connected to the second air pipe 102; each dust box 101 corresponds to the position of a roller 11.

[0026] The working steps of this embodiment are: First, the steel strip 111 is cut and rolled, spread out and rolled flat, and then the steel strip 111 is rolled into a spiral pipe, and the spiral pipe is welded inside and outside. This is the general step of producing the spiral welded pipe body 222 in the prior art. Considering that metal powder and dust debris will adhere to the surface of the steel strip 111 during the cutting and rolling process, and dust impurities will cause defects such as pores and slag inclusions in the weld during the welding process, a high-pressure pneumatic nozzle 8 and a roller 11 are set to pass the rolled flat steel strip 111 between the two corresponding rollers 11 above and below, and then all the electric actuators 3 are controlled to extend, synchronously driving the I-shaped frame 4 and the corresponding The movement of the parts makes the high-pressure pneumatic nozzle 8 approach the surface of the steel strip 111. At the same time, the roller 11 is attached to the surface of the steel strip 111 with the cooperation of the spring rod 9. As the electric actuator 3 continues to extend, the distance between the I-frame 4 and the steel strip 111 is further shortened, thereby compressing the spring rod 9. Through the rebound force of the spring rod 9, the roller 11 is pressed against the surface of the steel strip 111. The external air pump is connected to the first air pipe 7. The external air pump delivers high-pressure gas to each high-pressure pneumatic nozzle 8 through the first air pipe 7. The surface of the steel strip 111 is purged with high pressure through the high-pressure pneumatic nozzle 8 to remove a large amount of dust and impurities adhering to the surface of the steel strip 111, thereby improving the cleanliness of the steel strip 111 before welding.

[0027] Since the steel strip 111 itself is magnetic, magnetic dust particles are adsorbed on the surface of the steel strip 111. The dust cannot be fully removed by simply blowing or sucking. Therefore, a spiral 14 is added to the roller 11, and an alternating current is passed through the spiral 14 through the terminal of the conductive ring 15. The terminal of the conductive ring 15 on the left is connected to the positive pole of the external power supply, and the terminal of the conductive ring 15 on the right is connected to the negative pole of the external power supply. Therefore, the spiral 14 will generate a horizontal alternating magnetic field, which acts on the surface of the steel strip 111 and disrupts the magnetic field. The magnetic domains are arranged to achieve demagnetization. At this time, the number of turns of the spiral 14 on the roller 11 from front to back is gradually reduced, and the winding directions of the spirals 14 on the two adjacent rollers 11 are opposite, and the winding directions of the spirals 14 on the two corresponding rollers 11 are also opposite, so that the strip steel 111 is fully demagnetized when passing through the processing device, thereby avoiding the magnetic field of the strip steel 111 interfering with the welding arc, causing the welding arc to deviate, that is, magnetic blow, resulting in deviation of the welding position, reducing the welding quality, and preventing the strip steel 111 from being conveyed. At 11, the steel strip 111 drives the roller 11 to rotate. A silicone pad layer of a micro-pyramid array is arranged on the surface of the roller 11. The roller 11 and the steel strip 111 are in static friction contact. Therefore, static electricity will accumulate on the silicone pad layer of the roller 11. When the micro-pyramid array structure on the surface of the roller 11 contacts the surface of the steel strip 111, the micro-pyramid array on the surface of the roller 11 is compressed and expanded and deformed, so that the silicone pad layer on the surface of the roller 11 is closer to the surface of the steel strip 111. Then, as the steel strip 111 is transmitted, the roller 11 rotates, and the silicone pad layer originally expanded and deformed. The deformed micro-pyramid array structure is separated from the surface of the steel strip 111, causing it to shrink and recover, and carrying away the dust and impurities on the surface of the steel strip 111, thereby completing the cleaning of the dust and impurities on the steel strip 111 that has lost its magnetism, and achieving full cleaning of the steel strip 111. Then the second air pipe 102 is connected to the air suction port of the external air pump, and through the second air pipe 102 and each dust collection box 101, the opening of the dust collection box 101 on the side of the roller 11 sucks away the dust on the corresponding roller 11, thereby achieving automatic cleaning of the roller 11.

[0028] Dust and impurities will not only affect the welding process of the spiral welded pipe body 222, but the above process also mentioned that the strip steel 111 must be flattened and rolled first so that the strip steel 111 can be used for the welding of the spiral welded pipe body 222. Therefore, during the flattening and rolling process, due to the unwinding of the strip steel 111 and the mechanical vibration of the rolling equipment, the strip steel 111 is likely to vibrate. The vibration is likely to cause the spiral angle of the strip steel 111 to fluctuate during the welding process, resulting in uneven weld gaps. The residual vibration will also superimpose welding thermal stress, causing cracks or grain coarsening, causing the weld to become brittle, affecting the use of the spiral welded pipe body 222. In the prior art, the flattened and rolled steel strip 111 is generally pulled out for a long distance, and the influence of vibration is offset by the gravity and elasticity of the steel strip 111 itself, which requires a large amount of space and increases production costs. At this time, the roller 11 is pressed against the surface of the steel strip 111 by the spring rod 9. When the vibration generated by the steel strip 111 passes through the position of the roller 11, the vibration is offset by the damping effect of the spring rod 9, so that the vibration energy of the steel strip 111 is absorbed when it leaves the position of the roller 11, thereby avoiding welding quality problems caused by the vibration of the steel strip 111 and effectively ensuring the welding quality of the spiral welded pipe body 222.

[0029] Second embodiment On the basis of the first embodiment, according to Figure 1-Figure 6 As shown, it also includes a diverter box 6; all L-shaped cantilever beams 5 on each I-shaped frame 4 are bolted together to have a diverter box 6; each diverter box 6 is connected to a first air pipe 7; each diverter box 6 is connected to a corresponding high-pressure pneumatic nozzle 8 on the opposite sides; an electric heating plate is arranged in the diverter box 6.

[0030] The working steps of this embodiment are: In the above embodiment, it is mentioned that the steel strip 111 needs to be pressed by the roller 11. Considering the influence of moisture in the ambient air, as the processing procedure of the spiral welded pipe body 222 proceeds, the silicone cushion layer of the roller 11 continues to contact the steel strip 111. Most of the steel strip 111 is in contact with the air, and the steel strip 111 is an excellent thermal conductor. When the humidity in the ambient air is high, the moisture in the air will condense on the surface of the steel strip 111. Therefore, when the steel strip 111 contacts the roller 11, the moisture on the steel strip 111 will be transferred to the silicone cushion layer of the roller 11, and the moisture will combine with dust and impurities. The dust and impurities on the roller 11 will be condensed. The dust and impurities on the roller 11 are easily re-adhered to the steel strip 111, and some dust and impurities on the roller 11 remain in the gap of the micro-pyramid array of the silicone pad layer of the roller 11 in a colloid state, which makes it difficult to clean the silicone pad layer of the roller 11 later. At this time, a diverter box 6 is added, and an electric heating plate is arranged in the diverter box 6, so that the gas blown out of the first air pipe 7 first enters the diverter box 6, and the gas is first heated, and then sprayed out through the high-pressure pneumatic nozzle 8, thereby preheating the steel strip 111, and blowing and evaporating the condensed water on the steel strip 111, so that the surface of the steel strip 111 remains dry, which is convenient for removing dust and impurities on the surface of the steel strip 111.

[0031] The third embodiment On the basis of the second embodiment, according to Figure 1-Figure 6 As shown, it also includes a shunt pipe 12 and a confluence pipe 13; the roller 11 is a hollow tube; the right ends of all rollers 11 at the same horizontal position are connected to a shunt pipe 12; the left ends of all rollers 11 at the same horizontal position are connected to a confluence pipe 13.

[0032] It also includes a cooling box 16, a first water pipe 17, a pump 18, a second water pipe 19 and a semiconductor radiator 20; two L-shaped cantilever beams 5 at the same horizontal position are fixedly connected to a cooling box 16; the front of each cooling box 16 is fixedly connected to a diversion box 6; the diversion box 6 is made of heat-insulating material; each manifold 13 is connected to a first water pipe 17; each first water pipe 17 passes through a cooling box 16; a pump 18 is installed on the right side of each cooling box 16; the input end of each pump 18 is connected to a first water pipe 17; the output end of each pump 18 is connected to a second water pipe 19; each second water pipe 19 is connected to a diversion pipe 12; each cooling box 16 is installed with a number of equidistantly distributed semiconductor radiators 20; the P-type and N-type semiconductors of the semiconductor radiator 20 serve as the cold end and the hot end respectively.

[0033] It also includes a heat conducting sheet 21; all semiconductor heat sinks 20 at the same horizontal position are fixedly connected to the shunt box 6 through heat conducting rods; a number of heat conducting sheets 21 equidistantly distributed front and back are fixedly connected between adjacent heat conducting rods; all heat conducting sheets 21 are located in the shunt box 6.

[0034] The working steps of this embodiment are: It should also be considered that, based on the problem that the steel strip 111 will generate magnetism when it is rolled out as mentioned in the first embodiment, a spiral 14 is provided on the roller 11, and the spiral 14 is energized. A large amount of heat is generated during the working process of the spiral 14, which hollows out the inside of the roller 11, and pre-fills the roller 11, the shunt pipe 12, the manifold 13 and related pipelines with heat transfer fluid. At this time, the pump 18 is controlled to start, and the pump 18 draws the heat transfer fluid in the manifold 13 through the first water pipe 17, and then pumps it into the shunt pipe 12 through the second water pipe 19. When the heat transfer fluid enters the shunt pipe 12, the original heat transfer fluid in the shunt pipe 12 The heat-conducting liquid first flows into each hollow roller 11, and then enters the manifold 13, thereby realizing the circulation of the heat-conducting liquid. The flowing heat-conducting liquid can conduct away a large amount of heat generated by the working process of the spiral 14. At this time, a cooling box 16 and a semiconductor radiator 20 are set, and heat-conducting liquid is also injected into the cooling box 16. The semiconductor radiator 20 cools down the heat-conducting liquid in the cooling box 16, and the heat-conducting liquid in the cooling box 16 evenly cools down the heat-conducting liquid passing through the first water pipe 17. When the low-temperature heat-conducting liquid reaches the roller 11, it can exchange heat with the roller 11 to achieve cooling of the roller 11, and at the same time, the heat When the heat-conducting fluid passes through the cooling box 16, the heat-conducting fluid exchanges heat with the heat-conducting fluid in the cooling box 16 through the first water pipe 17, so that the heat-conducting fluid in the cooling box 16 is heated. At this time, direct current is passed to the semiconductor radiator 20, and the cold end of the semiconductor radiator 20 is in the cooling box 16. The heat-conducting rod in the cooling box 16 absorbs heat from the heat-conducting fluid. The hot end of the semiconductor radiator 20 is located in the diverter box 6. The heat of the semiconductor radiator 20 is released through the heat-conducting rod, thereby realizing active cooling. The heat-conducting fluid flowing through the roller 11 exchanges heat with the roller 11 to dissipate heat, and further exchanges heat with the spiral 14 to dissipate heat, thereby The temperature of the spiral 14 is maintained stable to ensure that the demagnetization process continues, the demagnetization efficiency and effect are guaranteed, and there is a first air pipe 7 in the diverter box 6 to continuously pump air. The air passes through the heat conducting rod of the semiconductor radiator 20 located in the diverter box 6, and takes away the heat of the hot end of the semiconductor radiator 20. The heat conducting plate 21 is added to increase the contact area with the gas pumped out by the first air pipe 7, which is convenient for the heat dissipation of the hot end of the semiconductor radiator 20 in the heat conducting rod in the diverter box 6, reduces the energy consumption of the electric heating plate in the diverter box 6, realizes the utilization of waste heat, and cooperates with the high-pressure pneumatic nozzle 8 to preheat the strip steel 111 and save energy resources.

[0035] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes, comprising a base (1) and a mounting frame (2); the base (1) is fixedly connected to the mounting frame (2); the characteristics are: It also includes a power unit, a first air pipe (7), a high-pressure pneumatic nozzle (8), a spring rod (9), a straight suspension beam (10), a roller (11), a spiral (14) and a conductive ring (15); the mounting frame (2) is connected to two power units; each power unit is connected to a first air pipe (7); each first air pipe (7) is installed with a plurality of high-pressure pneumatic nozzles (8) equidistantly distributed on the left and right; each power unit is connected to two spring rods (9); two straight suspension beams (10) are arranged between the two power units; each straight suspension beam (1 0) are each fixedly connected to a corresponding spring rod (9); a plurality of rollers (11) are rotatably connected between two straight suspension beams (10) at the same horizontal position; a detachable silicone pad is applied to the surface of the rollers (11); a spiral (14) is wound around the surface of each roller (11); the spiral (14) is an electrical conductor; a plurality of conductive rings (15) are installed in each straight suspension beam (10); two conductive rings (15) corresponding to each other at the same horizontal position are electrically connected to a spiral (14); and each conductive ring (15) is connected to a terminal.

2. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes according to claim 1, characterized in that: The power unit comprises an electric actuator (3), an I-shaped frame (4) and an L-shaped suspension beam (5); a plurality of electric actuators (3) are respectively mounted on the upper and lower parts of the mounting frame (2); the telescopic parts of all the electric actuators (3) on the upper part are fixedly connected to an I-shaped frame (4); the telescopic parts of all the electric actuators (3) on the lower part are fixedly connected to another I-shaped frame (4); the left and right parts of each I-shaped frame (4) are respectively connected to two spring rods (9); two straight suspension beams (10) are located between the two I-shaped frames (4); each I-shaped frame (4) is respectively fixedly connected to two L-shaped suspension beams (5) distributed on the left and right sides; and all the L-shaped suspension beams (5) on each I-shaped frame (4) are connected to a first air pipe (7).

3. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes according to claim 2, characterized in that: The surface of the silicone pad layer of the roller (11) has a micro-pyramid array.

4. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes according to claim 3, characterized in that: From front to back, the number of turns of the spiral (14) on the roller (11) gradually decreases.

5. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes according to claim 4, characterized in that: The winding directions of the spirals (14) on the two adjacent rollers (11) are opposite, and the winding directions of the spirals (14) on the two corresponding rollers (11) are also opposite.

6. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes according to claim 5, characterized in that: It also includes a dust collection box (101) and a second air pipe (102); a plurality of dust collection boxes (101) are fixedly connected between every two straight suspension beams (10) at the same horizontal position; all dust collection boxes (101) at the same horizontal position are connected to the second air pipe (102); and each dust collection box (101) corresponds to a roller (11) in position.

7. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes according to any one of claims 1 to 6, characterized in that: It also includes a diverter box (6); all L-shaped suspension beams (5) on each I-shaped frame (4) are fixedly connected to a diverter box (6); each diverter box (6) is connected to a first air pipe (7); the opposite sides of each diverter box (6) are connected to corresponding high-pressure pneumatic nozzles (8); and an electric heating plate is arranged in the diverter box (6).

8. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes according to claim 7, characterized in that: It also includes a flow distribution pipe (12) and a flow collection pipe (13); the roller (11) is a hollow pipe; the right ends of all rollers (11) at the same horizontal position are connected to a flow distribution pipe (12); and the left ends of all rollers (11) at the same horizontal position are connected to a flow collection pipe (13).

9. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes according to claim 8, characterized in that: It also includes a cooling box (16), a first water pipe (17), a pump (18), a second water pipe (19) and a semiconductor radiator (20); two L-shaped suspension beams (5) at the same horizontal position are fixedly connected to a cooling box (16); the front of each cooling box (16) is fixedly connected to a diversion box (6); each manifold (13) is connected to a first water pipe (17); each first water pipe (17) passes through a cooling box (16); each cooling box (16) is equipped with a pump (18); the input end of each pump (18) is connected to a first water pipe (17); the output end of each pump (18) is connected to a second water pipe (19); each second water pipe (19) is connected to a shunt pipe (12); a plurality of semiconductor radiators (20) are installed in each cooling box (16); the P-type and N-type semiconductors of the semiconductor radiator (20) serve as the cold end and the hot end respectively; the semiconductor radiator (20) is used to cool the heat transfer fluid in the cooling box (16).

10. A spiral welded pipe pretreatment processing device for municipal rainwater and sewage pipes according to claim 9, characterized in that: It also includes a heat conducting sheet (21); all semiconductor heat sinks (20) at the same horizontal position are fixedly connected to the shunt box (6) via heat conducting rods; a plurality of heat conducting sheets (21) are fixedly connected between adjacent heat conducting rods; and all the heat conducting sheets (21) are located in the shunt box (6).

Images