A device for processing and cleaning insulation pipes

Abstract

The present invention provides a device for processing and cleaning an insulated pipe, which relates to the technical field of dirt cleaning. The cleaning device body comprises a cleaning table, a driving mechanism, a guiding mechanism and a pressurizing mechanism. A column is welded at one end of the surface of the cleaning table, a top plate is welded on the top of the column, a pressurizing mechanism is inserted under the top plate, a pressing wheel is embedded at the bottom of the pressurizing mechanism, and the pressurizing mechanism applies downward pressure to the top of the insulated pipe to be cleaned through the pressing wheel. The bottom of the cleaning table is embedded with a driving mechanism. The cleaning device controls the rotation of the insulated pipe to be cleaned through the driving mechanism, and can drive the flushing component to move in conjunction with the inner guiding mechanism to achieve the flushing effect on the inner wall of the insulated pipe, and diverts waste water to avoid secondary pollution, thereby improving the utilization rate of clean water, and provides multi-directional pressure application during the cleaning process, so that the rotation and movement of the flushing component are smoother and more effective.

Description

Technical Field

[0001] The invention relates to the technical field of dirt cleaning, and in particular to a device for processing and cleaning thermal insulation pipes. Background Art

[0002] The main purpose of cleaning during the insulation pipe production process is to ensure the neatness and halo inside and outside the pipe, prevent impurities and dirt adhered during the previous processing from affecting the performance of the pipe, and ensure the smooth flow of the pipe. Cleaning can thoroughly remove dirt and sediment in the pipe, thereby improving the water or gas transmission efficiency of the pipe. The inner wall of the pipe is smooth after cleaning, which reduces heat loss and improves the insulation effect during subsequent use.

[0003] In the prior art, the cleaning device used in the production process of the insulation pipe directly flushes the inner wall through the flushing equipment, but during the flushing process, part of the wastewater generated will flow toward the surroundings, which will cause the area that has been flushed to be polluted again, prolonging the overall cleaning cycle and requiring a large amount of clean water. On the other hand, although the direction of wastewater flow can be limited by cleaning the pipe upright, the pipe needs to be lifted during the entire cleaning process, so the preparation process is time-consuming and labor-intensive, which increases the difficulty of cleaning. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a device for processing and cleaning insulated pipes to solve the problems raised in the above-mentioned background technology. The present invention controls the rotation of the insulated pipe to be cleaned by a driving mechanism, and cooperates with the inner guide mechanism to drive the flushing component to move, thereby achieving the flushing effect on the inner wall of the insulated pipe, and diverting the waste water to avoid secondary pollution, thereby improving the utilization rate of clean water, and providing multi-directional pressure application during the cleaning process, so that the rotation and movement of the flushing component are smoother and more effective.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a device for processing and cleaning insulated pipes, comprising a cleaning device body, the cleaning device body comprising a cleaning table, a driving mechanism, a guiding mechanism and a boosting mechanism, a column is welded at one end of the surface of the cleaning table, a top plate is welded at the top of the column, a boosting mechanism is inserted under the top plate, a pressing wheel is embedded at the bottom of the boosting mechanism, and the boosting mechanism applies downward pressure to the top of the insulated pipe to be cleaned through the pressing wheel, a driving mechanism is embedded at the bottom of the cleaning table, the driving mechanism is used to lean against the bottom of the insulated pipe, a lower hanging plate is welded at the bottom of the top plate, a guide mechanism is inserted at one side of the lower hanging plate, a flushing assembly is sleeved on the surface of the guide mechanism, a flushing pipe and a drainage pipe are connected to the side of the flushing assembly, and the flushing pipe and the drainage pipe both pass out from the same end of the insulated pipe.

[0006] Furthermore, the boosting mechanism includes a top support plate and a bottom pressure plate, a plurality of pressing wheels are embedded in the bottom of the bottom pressure plate, a rotating shaft is inserted at the end of the top support plate, a support arm is sleeved on the side of the rotating shaft, and a hanging ring is integrally formed at the bottom of the support arm.

[0007] Furthermore, a first spring rod is inserted at the edge of the top support plate, a second spring rod is inserted at the edge of the bottom pressure plate, and an electric lifting rod is screwed on the surface of the bottom pressure plate, the tops of the first spring rod and the second spring rod both pass upward from the surface of the top plate, and the top end of the electric lifting rod is screwed under the top support plate.

[0008] Furthermore, the guide mechanism includes a screw and a guide rod, the end of the screw is integrally formed with an extension column, the end of the guide rod is welded with a fixing plate, the surface of the screw is sleeved with a threaded sleeve, and the side of the threaded sleeve is integrally formed with a driven wheel.

[0009] Furthermore, there are two driven wheels, and a gap is provided between the two driven wheels. An anti-slip pad is attached to the side of each driven wheel, and the ends of the screw rod and the guide rod are welded as a whole through a fixing plate.

[0010] Furthermore, a water inlet pump and a drainage pump are screwed on the top of the top plate, one end of the water inlet pump is connected to a flushing pipe, one end of the drainage pump is connected to a drainage pipe, and the flushing pipe and the drainage pipe both pass through the surface of the top plate and the lower hanging plate in turn.

[0011] Furthermore, the flushing assembly includes a transmission frame, a first partition and a second partition. The side of the transmission frame is integrally formed with a plug-in plate, the plug-in plate is mounted on the screw rod through a hole in the middle, and the plug-in plate is integrally embedded in the gap between the two driven wheels. A nozzle is provided on the other side of the transmission frame.

[0012] Furthermore, a first partition and a second partition are integrally formed at the bottom of the transmission frame, a pumping hole is opened at the bottom of the first partition, a rubber layer is attached to the edge of the second partition, and a gap is provided between the edge of the first partition and the inner wall of the insulation pipe, the second partition is squeezed and fitted to the inner wall of the insulation pipe through the rubber layer, the flushing pipe is inserted into the interior of the transmission frame and connected with each nozzle, and the drainage pipe passes through the second partition and is embedded into the interior of the first partition and connected with the pumping hole at the bottom.

[0013] Furthermore, the driving mechanism includes a motor box and gears, the motor box is screwed with a motor, the motor output shaft is keyed with a gear, the surface of the cleaning table is embedded with a driving wheel, and the side of each driving wheel is fixed to the gear as a whole through a rod.

[0014] Furthermore, a toothed belt is sleeved between two adjacent gears, the number of the driving mechanisms is two, and the two driving wheels in each driving mechanism are symmetrically arranged on both sides of the insulation pipe.

[0015] Beneficial effects of the present invention:

[0016] 1. The device for processing and cleaning the insulation pipe controls the rotation of the insulation pipe to be cleaned through a driving mechanism, and cooperates with the inner guide mechanism to drive the flushing component to move, so that the insulation pipe can achieve a comprehensive flushing effect on the inner wall of the insulation pipe in both the rotation of the insulation pipe and the translation of the flushing component, avoiding the generation of flushing dead corners, and the pipe can be directly inserted horizontally, reducing the difficulty of preliminary preparation operations.

[0017] 2. When the thermal insulation pipe processing and cleaning device uses the flushing component to clean the inner wall of the thermal insulation pipe, the waste water can be directly diverted through the double-layer partition at the bottom to ensure that the waste water can only flow toward the end that has not been flushed, avoiding secondary pollution of the cleaned area, thereby improving the utilization rate of clean water. At the same time, the uncleaned area can also be soaked in advance, thereby enhancing the subsequent cleaning effect.

[0018] 3. During the cleaning process, the device for processing and cleaning the insulation pipe can simultaneously apply downward pressure to the insulation pipe and upward thrust to the insulation pipe through the booster mechanism at the top, and cooperate with the driving mechanism at the bottom to provide multi-directional pressure application. With the help of the multi-pressure effect, the rotation and movement process of the flushing component can be smoother and more effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the appearance of a device for processing and cleaning a thermal insulation pipe according to the present invention;

[0020] Figure 2 It is a structural schematic diagram of the cleaning station part of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the boosting mechanism part of the present invention;

[0022] Figure 4 It is a structural diagram of the guide mechanism part of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the driven wheel part of the present invention;

[0024] Figure 6 It is a structural diagram of the flushing assembly of the present invention;

[0025] Figure 7 is an internal cross-sectional view of the driving mechanism of the present invention;

[0026] In the figure: 1, cleaning table; 2, column; 3, top plate; 4, driving mechanism; 5, guiding mechanism; 6, motor box; 7, driving wheel; 8, boosting mechanism; 9, water inlet pump; 10, drainage pump; 11, lower hanging plate; 12, top support plate; 13, first spring rod; 14, rotating shaft; 15, supporting arm; 16, hanging ring; 17, bottom pressure plate; 18, second spring rod; 19, electric lifting rod; 20, pressing wheel; 21, screw rod; 22, guide rod; 23, extension column; 24, fixing plate; 25, flushing pipe; 26, drainage pipe; 27, flushing assembly; 28, driven wheel; 29, anti-skid pad; 30, threaded sleeve; 31, transmission frame; 32, plug-in board; 33, nozzle; 34, first partition; 35, water extraction hole; 36, second partition; 37, rubber layer; 38, gear; 39, toothed belt. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figures 1 to 7 The present invention provides the following technical solutions: a device for processing and cleaning an insulation pipe, comprising a cleaning device body, the cleaning device body comprising a cleaning table 1, a driving mechanism 4, a guiding mechanism 5 and a boosting mechanism 8, a column 2 is welded at one end of the surface of the cleaning table 1, a top plate 3 is welded at the top of the column 2, a boosting mechanism 8 is inserted below the top plate 3, a pressing wheel 20 is embedded at the bottom of the boosting mechanism 8, and the boosting mechanism 8 applies downward pressure to the top of the insulation pipe to be cleaned through the pressing wheel 20, a driving mechanism 4 is embedded at the bottom of the cleaning table 1, the driving mechanism 4 is used to lean against the bottom of the insulation pipe, a lower hanging plate 11 is welded at the bottom of the top plate 3, a guiding mechanism 5 is inserted at one side of the lower hanging plate 11, a flushing component 27 is sleeved on the surface of the guiding mechanism 5, a flushing pipe 25 and a drainage pipe 26 are connected to the side of the flushing component 27, and the flushing pipe 25 and the drainage pipe 26 both pass out from the same end of the insulation pipe. The cleaning device is used to flush the inner wall of the thermal insulation pipe after processing and production, so as to remove the impurities and dust inside.

[0029] When the present invention is used, the insulated pipe to be cleaned is directly pushed horizontally to the surface of the cleaning table 1. In the initial state, the end of the guide mechanism 5 is not connected to the top booster mechanism 8. Therefore, the insulated pipe to be cleaned can be directly sleeved on the surface of the guide mechanism 5, and the bottom of the insulated pipe to be cleaned can be pressed on the two driving mechanisms 4. In the initial state, the flushing component 27 is at the left end position of the guide mechanism 5. Therefore, the flushing component 27 will also be aligned with one end of the inner wall of the insulated pipe to be cleaned after the insulated pipe to be cleaned is sleeved. Then, the hanging ring 16 can be used to connect the booster mechanism 8 with the end of the guide mechanism 5, and the booster mechanism 8 is used to provide the guide mechanism 5 with a thrust applied to the inner wall of the insulated pipe to be cleaned. After the installation is completed, the driving mechanism 4 at the bottom is started, and the rotation of the insulated pipe to be cleaned is controlled by the driving mechanism 4. Then, the flushing component 27 is controlled to move along the guide mechanism 5 with the help of the guide mechanism 5, and the external flushing water is transported to the flushing component 27 with the help of a water pump and a pipeline, and finally sprayed onto the inner wall of the insulated pipe to be cleaned for cleaning.

[0030] In this embodiment, the booster mechanism 8 includes a top support plate 12 and a bottom pressure plate 17, a plurality of pressing wheels 20 are embedded at the bottom of the bottom pressure plate 17, a rotating shaft 14 is inserted at the end of the top support plate 12, a support arm 15 is sleeved on the side of the rotating shaft 14, and a hanging ring 16 is formed integrally at the bottom of the support arm 15. A first spring rod 13 is inserted at the edge of the top support plate 12, a second spring rod 18 is inserted at the edge of the bottom pressure plate 17, and an electric lifting rod 19 is screwed on the surface of the bottom pressure plate 17, the tops of the first spring rod 13 and the second spring rod 18 both pass upward from the surface of the top plate 3, and the top of the electric lifting rod 19 is screwed under the top support plate 12. During the cleaning process, the booster mechanism 8 at the top can simultaneously apply downward pressure and upward thrust of the guide mechanism 5 to the insulation pipe, and cooperate with the driving mechanism 4 at the bottom to provide multi-directional pressure application, and with the help of the multi-pressure effect, the rotation and movement process of the flushing component 27 is made more stable and effective.

[0031] Specifically, after the insulated pipe to be cleaned is installed, the support arm 15 is manually controlled to rotate until the hanging ring 16 is partially rotated downward and sleeved on the end of the extension column 23. Then, after the electric lifting rod 19 is started to extend, the top support plate 12 can be moved upward and the bottom pressure plate 17 can be moved downward. At this time, the top support plate 12 can be used to drive the support arm 15 at the end to apply an upward pulling force to the screw rod 21 below, and the pulling force acts on the driven wheel 28 with the help of the driven wheel 28, thereby effectively increasing the extrusion force between the driven wheel 28 and the inner wall of the insulated pipe to be cleaned, ensuring that the rotation of the insulated pipe to be cleaned can control the driven wheel 28 to rotate synchronously, and at the same time, with the help of the bottom pressure plate 17, the pressing wheel 20 below applies downward pressure to the top of the insulated pipe. On the one hand, this pressure further increases the extrusion effect between the insulated pipe to be cleaned and the driven wheel 28, and on the other hand, it can also increase the pressure of the insulated pipe to be cleaned pressed on the bottom driving mechanism 4, ensuring that the entire insulated pipe to be cleaned can rotate stably.

[0032] In this embodiment, the guide mechanism 5 includes a screw 21 and a guide rod 22. The end of the screw 21 is integrally formed with an extension column 23. The end of the guide rod 22 is welded with a fixing plate 24. The surface of the screw 21 is sleeved with a threaded sleeve 30. The side of the threaded sleeve 30 is integrally formed with a driven wheel 28. There are two driven wheels 28, and a gap is provided between the two driven wheels 28. The side of each driven wheel 28 is attached with an anti-skid pad 29. The ends of the screw 21 and the guide rod 22 are welded as a whole through the fixing plate 24. The top of the top plate 3 is screwed with a water inlet pump 9 and a drainage pump 10. One end of the water inlet pump 9 is connected to a flushing pipe 25. One end of the drainage pump 10 is connected to a drainage pipe 26. The flushing pipe 25 and the drainage pipe 26 pass through the surface of the top plate 3 and the lower hanging plate 11 in sequence.

[0033] Specifically, when the insulated pipe to be cleaned is controlled to rotate by the driving mechanism 4, the driven wheel 28 will be driven to rotate through the inner wall of the insulated pipe to be cleaned. After the driven wheel 28 rotates, since its center position is connected to the screw rod 21 through a threaded sleeve 30, the entire driven wheel 28 can be directly controlled to move along the surface of the screw rod 21 by means of the rotating threaded sleeve 30 and the middle screw rod 21, and then the clamped and connected flushing assembly 27 will also be moved synchronously, so as to achieve the purpose of horizontally moving the flushing area with the rotation of the insulated pipe to be cleaned, and each area of ​​the inner wall of the insulated pipe to be cleaned can be flushed and cleaned during the rotation and translation process.

[0034] In this embodiment, the flushing assembly 27 includes a transmission frame 31, a first partition 34 and a second partition 36. The side of the transmission frame 31 is integrally formed with a plug-in board 32, which is sleeved on the screw rod 21 through the hole in the middle, and the plug-in board 32 is integrally embedded in the gap between the two driven wheels 28. A nozzle 33 is provided on the other side of the transmission frame 31. The bottom of the transmission frame 31 is integrally formed with a first partition 34 and a second partition 36. The bottom of the first partition 34 is provided with a water pumping hole 35. The edge of the second partition 36 is attached with a rubber layer 37, and a gap is provided between the edge of the first partition 34 and the inner wall of the insulation pipe. The second partition 36 is pressed and fitted with the inner wall of the insulation pipe through the rubber layer 37. The flushing pipe 25 is inserted into the interior of the transmission frame 31 and connected with each nozzle 33. The drainage pipe 26 passes through the second partition 36 and then is embedded in the first partition 34 and connected with the water pumping hole 35 at the bottom. When the inner wall of the insulation pipe is cleaned with the help of the flushing component 27, the waste water can be directly diverted through the double-layer partition at the bottom to ensure that the waste water can only flow toward the end that has not been flushed, avoiding secondary pollution of the cleaned area, thereby improving the utilization rate of clean water. At the same time, the uncleaned area can also be soaked in advance, enhancing the subsequent cleaning effect.

[0035] Specifically, the water inlet pump 9 on the top plate 3 transports external clean water to the flushing pipe 25, and finally enters the interior of the transmission frame 31, and then sprays toward the inner wall side of the insulated pipe to be cleaned from the nozzle 33 to realize the flushing process of the inner wall. The waste water generated after flushing flows downward, and when flowing toward the flushed area, it will first pass through the bottom of the first partition plate 34, and then be contacted by the pumping hole 35, and then be pumped out in conjunction with the drainage pump 10 and the drainage pipe 26 on the top. With the help of the second partition plate 36 on the side and the rubber layer 37 at the edge, it can be ensured that the waste water cannot flow into the internal area of ​​the cleaned insulated pipe to be cleaned.

[0036] In this embodiment, the driving mechanism 4 includes a motor box 6 and a gear 38. The motor box 6 is screwed with a motor inside, and the output shaft of the motor is keyed with a gear 38. The surface of the cleaning table 1 is embedded with a driving wheel 7, and the side of each driving wheel 7 is fixed to the gear 38 as a whole through a rod. A toothed belt 39 is sleeved between two adjacent gears 38. The number of the driving mechanisms 4 is two, and the two driving wheels 7 in each driving mechanism 4 are symmetrically arranged on both sides of the insulation pipe. The insulation pipe to be cleaned is controlled to rotate by the driving mechanism 4, and the flushing assembly 27 can be driven to move in cooperation with the inner guide mechanism 5, so that the inner wall of the insulation pipe can be fully flushed in both states of the rotation of the insulation pipe and the translation of the flushing assembly 27, avoiding the formation of dead corners for flushing, and the pipe can be directly inserted horizontally, reducing the difficulty of preliminary preparation operations. Specifically, after starting the motor, the motor drives the gear 38 and the toothed belt 39 to rotate, and then the driving wheel 7 connected to the side combination of the gear 38 drives the insulated pipe to be cleaned placed on the top to rotate, and the insulated pipe to be cleaned is always subjected to downward pressure through the booster mechanism 8 on the top, thereby ensuring stable transmission between the driving wheel 7 and the bottom of the insulated pipe to be cleaned.

[0037] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for cleaning a heat preservation pipe, comprising a cleaning device body, characterized in that: The cleaning device body comprises a cleaning table (1), a driving mechanism (4), a guiding mechanism (5) and a pressurizing mechanism (8); a column (2) is welded to one end of the surface of the cleaning table (1); a top plate (3) is welded to the top of the column (2); a pressurizing mechanism (8) is inserted below the top plate (3); a pressing wheel (20) is embedded at the bottom of the pressurizing mechanism (8); and the pressurizing mechanism (8) applies downward pressure to the top of the insulation pipe to be cleaned through the pressing wheel (20); a driving mechanism (4) is embedded at the bottom of the cleaning table (1); the driving mechanism (4) is used to lean against the bottom of the insulation pipe; a lower hanging plate (11) is welded to the bottom of the top plate (3); a guide mechanism (5) is inserted on one side of the lower hanging plate (11); and the guide mechanism (5) is inserted on one side of the guide mechanism (5). A flushing assembly (27) is sleeved on the surface of the guide mechanism (5), and the side of the flushing assembly (27) is connected to a flushing pipe (25) and a drainage pipe (26), and the flushing pipe (25) and the drainage pipe (26) both pass outward from the same end of the insulation pipe. The booster mechanism (8) comprises a top support plate (12) and a bottom pressure plate (17), and a plurality of pressing wheels (20) are embedded at the bottom of the bottom pressure plate (17). A rotating shaft (14) is inserted at the end of the top support plate (12), and a support arm (15) is sleeved on the side of the rotating shaft (14). A hanging ring (16) is integrally formed at the bottom of the support arm (15). The guide mechanism (5) comprises a screw rod (21) and a guide rod (22), and the end of the screw rod (21) is An extension column (23) is integrally formed at the end of the guide rod (22), a fixing plate (24) is welded to the end of the guide rod (22), a threaded sleeve (30) is sleeved on the surface of the screw rod (21), and a driven wheel (28) is integrally formed on the side of the threaded sleeve (30), the flushing assembly (27) comprises a transmission frame (31), a first partition plate (34) and a second partition plate (36), a plug-in plate (32) is integrally formed on the side of the transmission frame (31), the plug-in plate (32) is sleeved on the screw rod (21) through a hole in the middle, and the plug-in plate (32) is integrally embedded in the gap between the two driven wheels (28), a nozzle (33) is provided on the other side of the transmission frame (31), and the number of the driven wheels (28) is two, A gap is provided between the two driven wheels (28); a first partition (34) and a second partition (36) are integrally formed at the bottom of the transmission frame (31); a water extraction hole (35) is provided at the bottom of the first partition (34); a rubber layer (37) is attached to the edge of the second partition (36); and a gap is provided between the edge of the first partition (34) and the inner wall of the insulation pipe; the second partition (36) is pressed and fitted to the inner wall of the insulation pipe through the rubber layer (37); the flushing pipe (25) is inserted into the interior of the transmission frame (31) and is connected to each nozzle (33); and the drainage pipe (26) passes through the second partition (36) and is then embedded in the interior of the first partition (34) and is connected to the water extraction hole (35) at the bottom.

2. The device for processing and cleaning the thermal insulation pipe according to claim 1, characterized in that: A first spring rod (13) is inserted at the edge of the top support plate (12), a second spring rod (18) is inserted at the edge of the bottom pressure plate (17), and an electric lifting rod (19) is screwed onto the surface of the bottom pressure plate (17), the tops of the first spring rod (13) and the second spring rod (18) both pass upward from the surface of the top plate (3), and the top end of the electric lifting rod (19) is screwed onto the bottom of the top support plate (12).

3. The device for processing and cleaning the thermal insulation pipe according to claim 1, characterized in that: An anti-skid pad (29) is attached to the side of each driven wheel (28), and the ends of the screw rod (21) and the guide rod (22) are welded into a whole through a fixing plate (24).

4. The device for processing and cleaning the thermal insulation pipe according to claim 3 is characterized in that: A water inlet pump (9) and a drainage pump (10) are screwed to the top of the top plate (3); one end of the water inlet pump (9) is connected to a flushing pipe (25); one end of the drainage pump (10) is connected to a drainage pipe (26); and the flushing pipe (25) and the drainage pipe (26) are passed through the surfaces of the top plate (3) and the lower hanging plate (11) in sequence.

5. The device for processing and cleaning the thermal insulation pipe according to claim 1, characterized in that: The driving mechanism (4) comprises a motor box (6) and a gear (38); a motor is screwed inside the motor box (6); a gear (38) is keyed on an output shaft of the motor; a driving wheel (7) is embedded on the surface of the cleaning table (1); and the side edge of each driving wheel (7) is fixed to the gear (38) as a whole via a rod.

6. The device for processing and cleaning the thermal insulation pipe according to claim 5, characterized in that: A toothed belt (39) is sleeved between two adjacent gears (38). The number of the drive mechanisms (4) is two, and the two drive wheels (7) in each drive mechanism (4) are symmetrically arranged on both sides of the insulation pipe.

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