Scaffold steel pipe construction site paint repair system

Abstract

The application discloses a scaffold steel pipe construction site paint-repairing system, which comprises a steel pipe polishing device, a steel pipe painting device, a cyclone dust separator and a air-drying room; the steel pipe polishing device comprises a vertical cylinder A, a clamp is arranged below the vertical cylinder A, a pressing cover A, an inner wall grinding head and an outer wall grinding head are arranged at the top of the vertical cylinder A, the bottom of the vertical cylinder A is communicated with an air inlet of the air-drying room through a cyclone separator, and an air outlet of the air-drying room is communicated with the top of the vertical cylinder A; the steel pipe painting device comprises a vertical cylinder B, a rotary table and a paint outlet pipe are arranged below the vertical cylinder B, and a pressing cover B is arranged at the top of the vertical cylinder B. According to the above structure, the scaffold steel pipe construction site paint-repairing system can realize the regular and rapid polishing, painting and air-drying of the small batch of scaffold steel pipes which are replaced, have paint falling or even rust, so that enough scaffold steel pipes can be reserved, and waste gas and waste generated in the whole process can be circulated in the system, and the surrounding environment is not polluted.

Description

Technical Field

[0001] This invention relates to the technical field of on-site paint repair for construction scaffolding, specifically to an on-site paint repair system for scaffolding steel pipes. Background Technology

[0002] During construction, scaffolding is always erected around the building to facilitate the work of construction workers. Currently, the most common type of scaffolding used in the market is seamless steel pipe. When erecting scaffolding, workers simply use connectors to splice and fix multiple seamless steel pipes together to form the scaffolding structure.

[0003] Scaffolding is exposed to the outdoors, working in wind and rain for extended periods. Furthermore, construction sites often expose it to cement and other materials, making the working environment relatively harsh. Additionally, scaffolding must protect construction workers; therefore, the steel pipes used for scaffolding are typically coated with a highly visible paint finish. This not only prevents corrosion of the seamless steel pipes but also serves as a warning to construction workers.

[0004] However, scaffolding is in direct contact with construction workers for extended periods. During construction, it's inevitable that tools or other building materials will collide with the scaffolding. This damages the paint on the scaffolding surface, making it prone to rust in daily use. Rust not only affects the strength of the scaffolding itself, posing a safety hazard to construction workers, but also inevitably causes abrasions and cuts to the workers' skin. If these abrasions come into contact with the rust on the seamless steel pipes, it can cause tetanus, further endangering the workers' health.

[0005] Therefore, in construction sites with standardized safety management, scaffolding workers will inspect the steel pipes of the scaffolding daily after the scaffolding has been erected to ensure the safety and health of the workers as much as possible.

[0006] However, due to the lack of suitable conditions at existing construction sites, scaffolding workers can only pile up the replaced seamless steel pipes in designated areas of the site after they have been replaced, until they have accumulated a truckload. Then, they contact the seamless steel pipe supplier or factory to purchase a full truckload of scaffolding seamless steel pipes, while simultaneously recycling the replaced pipes to reduce the purchase cost. However, because construction cycles are generally long, this method of replacing scaffolding seamless steel pipes is necessary periodically throughout the construction period, resulting in relatively high replacement costs. Furthermore, even with a large stockpile of replaced seamless steel pipes, to ensure continued inspection and replacement of problematic pipes, the construction team needs to maintain a sufficient supply of replacement pipes, further increasing construction costs.

[0007] Therefore, how to minimize the overall cost while ensuring that seamless steel pipes of scaffolding can be inspected and replaced is a technical problem that urgently needs to be solved by those skilled in the art.

[0008] The only approach the technical personnel could think of was for on-site scaffolding workers to repaint the damaged or rusted scaffolding themselves after replacing it. However, repainting requires first grinding the surface of the seamless steel pipes to remove the original paint and rust layers before painting can begin. Since seamless steel pipes are typically 3 to 5 meters long, and multiple pipes are usually replaced after daily inspections, the workload for grinding and repainting them is relatively large, requiring additional personnel; otherwise, implementation would be quite difficult.

[0009] Furthermore, the technicians of this application also discovered that because the ends of the seamless steel pipes used for scaffolding are not sealed, water can accumulate at the bottom of the inner wall of horizontally placed seamless steel pipes, and water can frequently flow through the inner wall of vertically placed seamless steel pipes. Moreover, the inner wall of seamless steel pipes is generally not painted, so rust can also form. Additionally, since nothing comes into contact with the inner wall of the seamless steel pipe normally, once rust forms, the accumulated rust layer is quite thick. Furthermore, because rust on the inner wall of seamless steel pipes is not easily detected in time, once rust is discovered on the outer surface, it indicates that the corresponding location of the seamless steel pipe is almost completely corroded. Such seamless steel pipes, due to structural damage and compromised strength, must be scrapped.

[0010] The seamless steel pipes are then re-polished and painted by on-site scaffolding workers. Since the seamless steel pipes are 3 to 5 meters long, manual polishing is obviously not feasible. Although there are specialized equipment for polishing the inner wall of pipes on the market, such equipment is relatively expensive, and the environmental conditions at the construction site cannot meet the installation and usage requirements of such equipment. Therefore, how to polish and paint the inner wall of seamless steel pipes on the construction site is another, even bigger, technical problem.

[0011] Moreover, construction sites now have very high requirements for environmental protection. Grinding the surface of seamless steel pipes will cause dust and noise pollution, while painting the surface of seamless steel pipes will cause some pollution to the surrounding air.

[0012] Therefore, how to conveniently and effectively grind and paint the outer and inner surfaces of small batches of seamless steel pipes that are replaced daily with peeling paint or rust on-site, while also solving environmental protection issues, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0013] The purpose of this invention is to overcome the shortcomings of the prior art and provide a scaffolding steel pipe on-site painting system. This system enables the regular and rapid grinding, painting, and air-drying of small batches of replaced scaffolding steel pipes that have peeling paint or are even rusted, ensuring that there are always enough scaffolding steel pipes available for backup. Furthermore, the waste gas and debris generated throughout the process are all processed within the system and will not cause pollution to the surrounding environment.

[0014] The technical solution adopted in this invention is: A scaffolding steel pipe on-site painting system includes a steel pipe grinding device, a steel pipe painting device, a cyclone separator dust collector, and a drying chamber, with the drying chamber located next to the steel pipe painting device. The steel pipe grinding device includes a vertical cylinder A supported by a support leg A. The side wall of the vertical cylinder A has an openable and closable side door A. A clamp for clamping the bottom end of the steel pipe is fixedly installed at the lower part of the vertical cylinder A. A vertically movable pressure cover A is coaxially located at the top of the vertical cylinder A, corresponding to directly above the clamp. A vertically movable inner wall grinding head is also located inside the vertical cylinder A, corresponding to the axis of the pressure cover A. A vertically movable outer wall grinding head is also coaxially located inside the vertical cylinder A, corresponding to the outer side of the pressure cover A. A vent pipe is located at the top of the vertical cylinder A, on the side where the side door A is located. The bottom of the vertical cylinder A is provided with a chip removal hole, which is connected to the air inlet of the cyclone separator through air duct A. The air outlet of the cyclone separator is connected to the air inlet of the drying chamber through air duct B. The air outlet of the drying chamber is connected to the exhaust gas treatment device and then to the ventilation pipe through air duct C. The steel pipe painting device includes a vertical cylinder B supported by a support leg B. The side wall of the vertical cylinder B is provided with an openable and closable side door B. The lower part of the vertical cylinder B is provided with a turntable that is rotatably connected around a vertical axis. Inside the vertical cylinder B, a paint liquid outlet pipe is fixed at the axis corresponding to the turntable. The outlet of the paint liquid outlet pipe extends upward out of the turntable. The top of the vertical cylinder B, corresponding to the turntable directly above it, is provided with a vertically movable pressure cover B, which is rotatably connected around the axis.

[0015] A further improvement of the present invention is that a horizontally arranged mesh plate is fixedly provided in the lower part of the vertical cylinder A, the clamp is fixed on the mesh plate, and a chip-gathering cavity is formed between the bottom A of the vertical cylinder A and the mesh plate.

[0016] A further improvement of the present invention is that the inner wall grinding head is connected to the grinding drive motor A, the grinding drive motor A is fixed to one end of the rigid transmission chain, and the other end of the rigid transmission chain extends upward from the vertical cylinder A and into the rigid transmission chain storage box. The rigid transmission chain storage box is provided with a storage groove that matches the rigid transmission chain. The rigid transmission chain storage box is also rotatably provided with a drive sprocket that is connected to the rigid transmission chain in the storage groove. The drive sprocket is coaxially fixed to the lifting drive motor A, and the lifting drive motor A is fixed to the outer wall of the rigid transmission chain storage box.

[0017] A further improvement of the present invention is that a plurality of flexible grinding discs A are uniformly fixed on the sidewall of the inner wall grinding head. The flexible grinding discs A are respectively arranged along the radial direction of the inner wall grinding head, and the plane of each flexible grinding disc A passes through the axis of the inner wall grinding head. A bristle group A is also fixed on the sidewall of the inner wall grinding head between two adjacent flexible grinding discs A. The plane of each bristle group A passes through the axis of the inner wall grinding head, and the bristles A of each bristle group A are arranged in parallel.

[0018] A further improvement of the present invention is that the outer wall grinding head has a ring structure, and multiple lifting carriages are evenly distributed on the outer side wall of the outer wall grinding head. The transmission gears B of the lifting carriages are respectively meshed and connected to the guide racks at corresponding positions on the inner wall of the vertical cylinder A. The side of the lifting carriage facing the outer wall grinding head is respectively provided with a limiting groove that matches the outer wall grinding head. The outer edge of the outer wall grinding head extends into the limiting groove. A gear ring is coaxially provided on the outer edge of the outer wall grinding head. The transmission gears A that mesh with the gear ring are rotatably connected in the limiting groove. One lifting carriage is fixedly provided with a grinding drive motor B, and the transmission gear A of the lifting carriage is connected to the grinding drive motor B. Another lifting carriage is fixedly provided with a lifting drive motor B, and the transmission gear B of the lifting carriage is connected to the lifting drive motor B.

[0019] A further improvement of the present invention is that a plurality of flexible grinding discs B are uniformly fixed on the inner sidewall of the outer wall grinding head. The flexible grinding discs B are respectively arranged along the radial direction of the outer wall grinding head, and the plane of each flexible grinding disc B passes through the axis of the outer wall grinding head. A bristle group B is also fixed on the sidewall of the outer wall grinding head between two adjacent flexible grinding discs B. The plane of each bristle group B passes through the axis of the outer wall grinding head, and the bristles B of each bristle group B are arranged in parallel.

[0020] A further improvement of the present invention is that a partition is fixedly provided in the lower part of the vertical cylinder B, the paint liquid outlet pipe extends upward from the center of the partition, the turntable is rotatably connected to the top center of the partition, one end of the paint liquid outlet pipe extending out of the partition passes upward through the turntable, a paint storage cavity is formed between the bottom B of the vertical cylinder B and the partition, and a paint pump is fixedly provided in the paint storage cavity, the paint liquid outlet pipe is correspondingly connected to the outlet of the paint pump.

[0021] A further improvement of the present invention is that a flexible sealing pad is fixed on the top surface of the turntable, and the paint liquid outlet pipe extends upward through the central hole provided in the center of the flexible sealing pad; a plurality of radial flexible protrusions are uniformly provided on the top of the flexible sealing pad, and the radial flexible protrusions extend from the inner edge of the flexible sealing pad that contacts the paint liquid outlet pipe to the outer edge of the flexible sealing pad.

[0022] A further improvement of the present invention is that the bottom edge of the pressure cover B is an annular conical arc surface B that slopes downward from the inside out. The top of the pressure cover B is fixed coaxially with the output shaft at the bottom of the rotary drive motor. The rotary drive motor is connected to the vertical cylinder B via a lifting drive piston B, which is fixed to the top of the vertical cylinder B. The outer diameter of the steel pipe is larger than the inner diameter of the annular conical arc surface B and smaller than the outer diameter of the annular conical arc surface B. The bottom surface of the pressure cover B, corresponding to the position of the annular conical arc surface B, is uniformly provided with multiple rigid protrusions centered on the axis of the pressure cover B. The rigid protrusions are arranged along the normal direction of the corresponding position of the annular conical arc surface B.

[0023] A further improvement of the present invention is that a lifting guide cylinder is fixedly provided on the top surface of the vertical cylinder B, and the lifting drive piston B is fixed to the top surface of the lifting guide cylinder. The end of the telescopic rod B extending out of the lifting drive piston B extends downward into the lifting guide cylinder and is fixed to the rotary drive motor. The inner wall of the lifting guide cylinder matches the side wall of the rotary drive motor. A guide limiting tube is fixedly provided at the top of the vertical cylinder B within the range of the lifting guide cylinder, corresponding to the output shaft of the rotary drive motor. The end of the output shaft of the rotary drive motor extends downward through the guide limiting tube and is coaxially fixedly connected to the center of the top of the pressure cover B. When the lifting drive... When piston B drives the rotary drive motor to move upward to the maximum stroke position inside the lifting guide cylinder, the pressure cover B moves upward to contact the bottom of the guide limiting riser. The top of the pressure cover B is coaxially fixed with a guide tube, and the inner wall of the guide tube matches the outer wall of the guide limiting riser. When the lifting drive piston B drives the rotary drive motor to move upward to the maximum stroke position inside the lifting guide cylinder, the guide tube moves upward to the top of the riser B. When the lifting drive piston B drives the rotary drive motor to move downward to the maximum stroke position inside the lifting guide cylinder, the top of the guide tube is still higher than the bottom of the guide limiting riser.

[0024] The beneficial effects of this invention are as follows: First, the scaffolding steel pipe on-site painting system of the present invention enables the regular and rapid grinding, painting, and air drying of small batches of replaced scaffolding steel pipes that have peeling paint or even rust, ensuring that there are always enough scaffolding steel pipes available for backup. Furthermore, the waste gas and debris generated throughout the process are all processed within the system and will not cause pollution to the surrounding environment.

[0025] Secondly, the scaffolding steel pipe on-site painting system of the present invention, through the setting of the steel pipe grinding device, can simultaneously grind the outer and inner surfaces of the seamless steel pipes used for scaffolding, thereby improving grinding efficiency and ensuring grinding quality.

[0026] Third, the scaffolding steel pipe on-site painting system of the present invention utilizes the flexible grinding disc A and brush group A of the inner wall grinding head of the steel pipe grinding device, as well as the flexible grinding disc B and brush group B of the outer wall grinding head. This allows the brush group to quickly scrape and destroy the paint layer and rust on the surface of the seamless steel pipe by contacting the brush group when the grinding head rotates. Then, the residual paint layer and rust spots on the surface of the seamless steel pipe are polished by contact with the flexible grinding disc. In addition, the brush group also separates and sweeps away the scraped paint layer debris, rust debris, paint powder, rust powder, metal powder, and debris formed by the wear of the grinding disc, so as to ensure that there are no debris residues on the inner wall of the seamless steel pipe, which facilitates the subsequent painting quality of the seamless steel pipe surface.

[0027] Fourth, the scaffolding steel pipe on-site painting system of the present invention, through the flexible structure of the flexible grinding disc and the brush assembly itself, enables the inner wall grinding head and the outer wall grinding head to be applicable to a variety of seamless steel pipes with different inner and outer diameters, thereby improving the applicability of the steel pipe grinding device.

[0028] Fifth, the scaffolding steel pipe construction site touch-up painting system of the present invention uses a flexible grinding disc with a bent sandpaper structure, and places the grinding surface on the outer side after bending. This not only increases the strength of the flexible grinding disc by increasing its thickness and extending its service life, but also allows grinding to be performed when the inner and outer grinding heads rotate in both directions. By using the flexible grinding disc in alternating directions, the service life of the flexible grinding disc is further extended.

[0029] Sixth, the scaffolding steel pipe construction site painting system of the present invention, through the side wall structure of the inner wall grinding head and the structural design of the brush group A, enables the inner wall grinding head to be inserted into the inner wall of the seamless steel pipe more easily, and also enables the brush group A to more effectively scrape the rust layer on the inner wall of the seamless steel pipe.

[0030] Seventh, the scaffolding steel pipe construction site painting system of the present invention, through the structure of the rigid transmission chain, can not only provide rigid force during the up and down movement of the inner wall grinding head, so that the inner wall grinding head can overcome resistance and move up and down, but also through the function of the rigid transmission chain storage box, can effectively reel in the rigid transmission chain extending from the vertical cylinder A, thereby effectively reducing the height of the steel pipe grinding device.

[0031] Eighth, the scaffolding steel pipe construction site paint repair system of the present invention, through the function of the guide riser, not only guides the rigid transmission chain, thereby improving the rigid transmission effect of the rigid transmission chain, but also limits the inner wall grinding head.

[0032] Ninth, the scaffolding steel pipe construction site paint repair system of the present invention, through the function of the connecting pipe, can not only transmit the lifting action of the lifting drive piston A to the pressure cover A, but also protect the rigid transmission chain located between the guide riser and the seamless steel pipe.

[0033] Tenth, the scaffolding steel pipe on-site paint repair system of the present invention, the annular cavity provided in the pressure cover A can not only improve the strength of the pressure cover A, but also effectively reduce the weight of the pressure cover A.

[0034] Eleventh, the scaffolding steel pipe construction site touch-up painting system of the present invention uses the action of cyclone separator dust collector to quickly and effectively remove dust generated in the steel pipe grinding device, avoid the presence of floating dust residue on the surface of seamless steel pipe that would affect the subsequent painting quality, and also protect the construction environment; in order to further ensure the dust removal effect, multiple cyclone separator dust collectors can be connected in sequence.

[0035] Twelfth, the scaffolding steel pipe construction site paint repair system of the present invention, through the structure of the outer wall grinding head, enables the outer wall grinding head of the ring structure to rotate more stably.

[0036] Thirteenth, the scaffolding steel pipe construction site touch-up painting system of the present invention, through the setting of the steel pipe painting device, can simultaneously paint the inner and outer walls of seamless steel pipes. Moreover, the seamless steel pipe is immersed in the paint liquid for painting. This method of painting can effectively ensure that the inner and outer surfaces of the seamless steel pipe are completely covered with a paint layer, and the paint layer thickness is uniform. In addition, by rotating the seamless steel pipe back and forth, the paint liquid can flow back to the paint storage chamber, so it can also effectively save paint liquid and improve the utilization rate of paint liquid.

[0037] Fourteenth, the scaffolding steel pipe on-site painting system of the present invention, through the flexible sealing pad and radial flexible protrusion structure provided on the top surface of the turntable, enables the seamless steel pipe to be painted. When the pressure cover B is pressed down, the flexible sealing pad and the bottom end of the seamless steel pipe and the paint outlet pipe are sealed respectively. This allows the paint to fill the inner wall of the seamless steel pipe and overflow outward to paint the outer surface of the steel pipe. After the painting is completed, the pressure cover B is raised to create a gap between the bottom end of the seamless steel pipe and the flexible sealing pad under the restoring force of the radial flexible protrusion, which facilitates the rapid outward discharge and return of the paint in the seamless steel pipe.

[0038] Fifteenth, the scaffolding steel pipe on-site painting system of the present invention, through the rigid convex strip structure set on the bottom surface of the pressure cover B, allows the paint inside the seamless steel pipe to overflow evenly from the top to the surrounding area, thereby ensuring the painting quality of the outer wall surface of the seamless steel pipe.

[0039] Sixteenth, the scaffolding steel pipe construction site touch-up painting system of the present invention, through the structure of the annular sleeve at the bottom of the pressure cover B, allows the paint overflowing from the top of the seamless steel pipe to flow down along the inner wall of the annular sleeve in a waterfall shape, preventing the overflowing paint from scattering outwards and ensuring that the overflowing paint can flow down completely along the outer wall surface of the seamless steel pipe. The waterfall-like downward flow of the paint can fully contact the inner wall of the seamless steel pipe for painting, and the paint flow thickness is relatively uniform, thereby ensuring the uniformity of the paint layer thickness on the outer wall surface of the seamless steel pipe.

[0040] Seventeenth, the scaffolding steel pipe construction site paint repair system of the present invention can effectively improve the strength of the pressure cover B by using the reinforcing ring A and the reinforcing ring B set in the pressure cover B, and at the same time ensure the lightweight of the pressure cover B as much as possible.

[0041] Eighteenth, the scaffolding steel pipe construction site paint repair system of the present invention, through the setting of the guide and limit riser, can guide and limit the output shaft, avoid the output shaft from shaking, and thus ensure the rotational stability of the seamless steel pipe driven by the pressure cover B.

[0042] Nineteenth, the scaffolding steel pipe construction site paint repair system of the present invention, through the setting of the guide pipe, in conjunction with the guide limiting riser, plays a continuous limiting and guiding role for the output shaft of the downward extending guide limiting riser, and at the same time can isolate the output shaft of the downward extending guide limiting riser from the outside, further playing a protective role.

[0043] Twentieth, the scaffolding steel pipe construction site paint touch-up system of the present invention, through the structure of the partition and the drop hole, enables the paint to flow back effectively, and also reduces the thickness of the paint accumulated on the surface of the partition, further improving the efficiency of the paint flowing back to the paint storage cavity. Attached Figure Description

[0044] Figure 1 This is a connection diagram for this application.

[0045] Figure 2 This is a side view of the steel pipe grinding device of this application.

[0046] Figure 3 This is a front view schematic diagram of the steel pipe painting device of this application.

[0047] Figure 4 This is a front sectional view of the steel pipe grinding device of this application.

[0048] Figure 5 This is a bottom-view enlarged schematic diagram of the inner wall grinding head of the steel pipe grinding device of this application.

[0049] Figure 6 This is a top-view enlarged schematic diagram of the outer wall grinding head of the steel pipe grinding device of this application.

[0050] Figure 7 This is a front sectional view of the steel pipe painting device of this application.

[0051] Figure 8 This is a magnified top view of the flexible sealing gasket layer of the steel pipe painting device of this application.

[0052] Figure 9 This is a front sectional view of the steel pipe grinding device of this application during use.

[0053] Figure 10 This is a front sectional view of the steel pipe painting device of this application in use. Detailed Implementation

[0054] Combination Figures 1-8 It is known that the scaffolding steel pipe construction site painting system includes a steel pipe grinding device 1, a steel pipe painting device 2, a cyclone separator dust collector 3, and a drying chamber 4, with the drying chamber 4 located next to the steel pipe painting device 2. The steel pipe grinding device 1 includes a vertical cylinder A100 supported by a support leg A107. The side wall of the vertical cylinder A100 is provided with an openable and closable side door A101. A clamp 102 for clamping the bottom end of the steel pipe 9 is fixedly installed inside the vertical cylinder A100. A vertically movable pressure cover A103 is provided at the top of the vertical cylinder A100, coaxially above the clamp 102. An inner wall grinding head 104, also movable, is provided inside the vertical cylinder A100, corresponding to the axis of the pressure cover A103. An outer wall grinding head 105, also movable, is provided inside the vertical cylinder A100, coaxially outside the pressure cover A103. A vent pipe 147 is provided at the top of the vertical cylinder A100 on the side where the side door A101 is located. The bottom of cylinder A100 is provided with a chip removal hole 106, which is connected to the air inlet of cyclone separator 3 through air duct A5. The air outlet of cyclone separator 3 is connected to the air inlet of drying chamber 4 through air duct B6. The air outlet of drying chamber 4 is connected to exhaust gas treatment device 8 and then to ventilation pipe 147 through air duct C7. The steel pipe painting device 2 includes a vertical cylinder B200 supported by support leg B209. The side wall of the vertical cylinder B200 has The structure includes an openable and closable side door B201. Inside the vertical cylinder B200, at the bottom, there is a turntable 203 rotatably connected around a vertical axis. Inside the vertical cylinder B200, at the axis corresponding to the turntable 203, there is a paint outlet pipe 205 fixed. The outlet of the paint outlet pipe 205 extends upward out of the turntable 203. Inside the vertical cylinder B200, at the top, directly above the turntable 203, there is a vertically movable pressure cover B204. The pressure cover B204 is rotatably connected around an axis.

[0055] A horizontally arranged mesh plate 108 is fixedly installed in the lower part of the vertical cylinder A100. The clamp 102 is fixed on the mesh plate 108. A chip-gathering cavity 143 is formed between the bottom A144 of the vertical cylinder A100 and the mesh plate 108 below it.

[0056] The mesh plate 108 is uniformly provided with chip removal holes 142.

[0057] The bottom of the cylinder A144 is a conical arc surface that slopes upward from the center to the edge, and a chip removal hole 106 is connected at the center of the bottom of the cylinder A144.

[0058] The chip discharge hole 106 is connected to the cyclone separator dust collector 3 through the air duct A5.

[0059] The clamp 102 is a multi-jaw chuck. Multiple sliders 140 are evenly distributed on the top surface of the clamp 102 with the axis of the clamp 102 as the center. The side wall of the clamp 102 is provided with screw bolts 141 that are connected to each slider 140 in a transmission manner. By screwing the screw bolts 141, each slider 140 moves inward or outward along the radial direction of its corresponding clamp 102.

[0060] The bottom surface of the pressure cover A103 is an annular conical arc surface A that slopes downward from the inside out. The top of the pressure cover A103 is coaxially fixed with an upwardly extending connecting pipe 110. The connecting pipe 110 is connected to the vertical cylinder A100 vertically via a lifting drive piston A109. The lifting drive piston A109 is fixed to the top of the vertical cylinder A100. The outer diameter of the steel pipe 9 is larger than the inner diameter of the annular conical arc surface A and smaller than the outer diameter of the annular conical arc surface A.

[0061] The pressure cover A103 has an annular cavity along the annular conical arc surface A.

[0062] The inner wall of the connecting pipe 110 is in contact with the inner wall of the pressure cover A103.

[0063] The top of the connecting pipe 110 is provided with a flange 111. Multiple lifting drive pistons A109 are provided, and each lifting drive piston A109 is evenly distributed around the axis of the connecting pipe 110. The end of the telescopic rod A of the lifting drive piston A109 extends downward from the lifting drive piston A109 and is fixedly connected to the flange 111.

[0064] The bottom of the lifting drive piston A109 is fixed to the top surface of the vertical cylinder A100.

[0065] The inner wall grinding head 104 is connected to the grinding drive motor A112. The grinding drive motor A112 is fixed to one end of the rigid transmission chain 114. The other end of the rigid transmission chain 114 extends upward from the vertical cylinder A100 and then into the rigid transmission chain storage box 115. The rigid transmission chain storage box 115 is provided with a storage groove 121 that matches the rigid transmission chain 114. The rigid transmission chain storage box 115 is also rotatably provided with a drive sprocket 118 that is connected to the rigid transmission chain 114 in the storage groove 121. The drive sprocket 118 is coaxially fixed to the lifting drive motor A113. The lifting drive motor A113 is fixed to the outer wall of the rigid transmission chain storage box 115.

[0066] The drive sprocket 118 is located at the connection point of the storage slot 121 of the rigid transmission chain storage box 115, corresponding to the rigid transmission chain 114 extending into the rigid transmission chain storage box 115 from the vertical cylinder A100.

[0067] The storage slot 121 extends inward along the edge of the rigid transmission chain storage box 115 to form a vortex shape.

[0068] The rigid transmission chain storage box 115 is located on the flexible side of the rigid transmission chain 114 inside the vertical cylinder A100.

[0069] The rigid transmission chain 114, extending from the rigid transmission chain storage box 115, passes through the driven sprockets A119 and B120 in sequence and extends downward into the vertical cylinder A100 from the top. The driven sprocket A119 is rotatably connected to the rigid transmission chain storage box 115 via the support frame A123, and the driven sprocket B120 is rotatably connected to the vertical cylinder A100 via the support frame B124. The rigid transmission chain 114 between the driven sprocket A119 and the opening of the storage groove 121 is aligned with the discharge direction of the opening of the storage groove 121. The rigid transmission chain 114, wound around the driven sprocket B120 and before entering the vertical cylinder A100, is aligned with the axial direction of the grinding drive motor A112.

[0070] The two ends of the shaft of the driven sprocket A119 and the two ends of the shaft of the driven sprocket B120 are rotatably connected by bearing seats 125 respectively provided on the top of the corresponding support frame A123 and the top of the support frame B124.

[0071] A guide tube 122 is fixedly provided at the top of the vertical tube A100, corresponding to the position where the rigid transmission chain 114 extends into the vertical tube A100. The guide tube 122 is set vertically downward, and the inner wall of the guide tube 122 matches the rigid transmission chain 114.

[0072] The top opening of the guide riser 122 extends upwards out of the riser A100.

[0073] The guide riser 122 is coaxially located inside the connecting pipe 110.

[0074] When the lifting drive motor A113 drives the inner wall grinding head 104 to move upward to the maximum stroke, the top of the grinding drive motor A112 contacts the bottom of the guide tube 122.

[0075] The inner wall grinding head 104 has a plurality of flexible grinding discs A116 uniformly fixed on its sidewall. The flexible grinding discs A116 are respectively arranged along the radial direction of the inner wall grinding head 104, and the plane of each flexible grinding disc A116 passes through the axis of the inner wall grinding head 104. The inner wall grinding head 104 also has a bristle group A117 fixed on its sidewall between two adjacent flexible grinding discs A116. The plane of each bristle group A117 passes through the axis of the inner wall grinding head 104, and the bristles A of each bristle group A117 are arranged in parallel.

[0076] The bristles A of the bristle group A117 are perpendicular to the side wall connection of the inner wall grinding head 104.

[0077] The distance between the end of the bristle A of the bristle group A117 away from the inner wall grinding head 104 and the axis of the inner wall grinding head 104 is greater than the distance between the edge of the flexible grinding disc A116 away from the inner wall grinding head 104 and the axis of the inner wall grinding head 104.

[0078] The maximum diameter of the side wall of the inner wall grinding head 104 is smaller than the inner diameter of the steel pipe 9, and the distance between the edge of the flexible grinding disc A116 away from the inner wall grinding head 104 and the axis of the inner wall grinding head 104 is greater than the inner radius of the steel pipe 9.

[0079] The bristles A of the bristle group A117 are metal wires.

[0080] The flexible grinding disc A116 is sandpaper A. The sandpaper A is bent in the middle and its two ends are fixed to the side walls of the inner wall grinding head 104. The grinding surface of the sandpaper A is located on the outer side after bending.

[0081] The two ends of the sandpaper A are attached together and then fixed to the side wall of the inner wall grinding head 104.

[0082] The outer wall grinding head 105 has a ring structure. Multiple lifting carriages 126 are evenly distributed on the outer side wall of the outer wall grinding head 105. The transmission gears B134 on the lifting carriages 126 mesh with guide racks 135 at corresponding positions on the inner wall of the vertical cylinder A100. Each lifting carriage 126 has a limiting groove 127 on the side facing the outer wall grinding head 105, matching the outer wall grinding head 105. The outer edge of the outer wall grinding head 105 extends into the limiting groove 127. A gear ring 145 is coaxially provided on the outer edge of 05. A transmission gear A130 that meshes with the gear ring 145 is rotatably connected in the limiting groove 127. A grinding drive motor B128 is fixedly provided in one of the lifting carriages 126, and the transmission gear A130 of the lifting carriage 126 is connected to the grinding drive motor B128. A lifting drive motor B129 is fixedly provided in one of the lifting carriages 126, and the transmission gear B134 of the lifting carriage 126 is connected to the lifting drive motor B129.

[0083] The top and bottom surfaces of the outer wall grinding head 105 are rotatably connected to the top and bottom groove walls of the limiting groove 127 via bearing A, respectively. The inner edge of the top surface and the inner edge of the bottom surface of the outer wall grinding head 105 are respectively provided with a limiting annular protrusion 146 that matches the bearing A.

[0084] The lifting drive motor B129 is connected to the corresponding transmission gear B134 via the transmission device 137.

[0085] The lifting vehicle 126, which is equipped with a lifting drive motor B129, is also equipped with a cover 139, and the lifting drive motor B129 and the transmission device 137 are both located inside the cover 139.

[0086] The lifting vehicle 126 is provided with multiple transmission gears B134 along the guide rack 135 that is connected to the transmission.

[0087] The lifting drive motor B129 is connected to at least one transmission gear B134 of the lifting vehicle 126.

[0088] The two end faces of the transmission gear B134 are respectively provided with lateral flanges 138 on the same axis, and the distance between the opposing surfaces of the two lateral flanges 138 of the same transmission gear B134 matches the width of the guide rack 135.

[0089] The side door A101 is located between two adjacent guide racks 135, and the distance between the two sides of the side door A101 is greater than the outer diameter of the steel pipe 9.

[0090] The side door A101 is located on the side of the vertical cylinder A100 facing away from the rigid transmission chain storage box 115.

[0091] The inner sidewall of the outer wall grinding head 105 is uniformly fixed with a plurality of flexible grinding discs B131. The flexible grinding discs B131 are respectively arranged along the radial direction of the outer wall grinding head 105, and the plane of each flexible grinding disc B131 passes through the axis of the outer wall grinding head 105. The sidewall of the outer wall grinding head 105, between two adjacent flexible grinding discs B131, is also fixed with a bristle group B132. The plane of each bristle group B132 passes through the axis of the outer wall grinding head 105, and the bristles B of each bristle group B132 are arranged in parallel.

[0092] The bristles B of the bristle group B132 are perpendicular to the connection point of the inner wall of the outer wall grinding head 105.

[0093] The distance between the end of the bristle B of the bristle group B132 away from the outer wall grinding head 105 and the axis of the outer wall grinding head 105 is less than the distance between the edge of the flexible grinding disc B131 away from the outer wall grinding head 105 and the axis of the outer wall grinding head 105.

[0094] The inner diameter of the inner wall of the outer wall grinding head 105 is greater than the outer diameter of the steel pipe 9, and the distance between the edge of the flexible grinding disc B131 away from the outer wall grinding head 105 and the axis of the outer wall grinding head 105 is less than the outer wall radius of the steel pipe 9.

[0095] The inner diameter of the inner wall of the outer wall grinding head 105 is larger than the outer diameter of the fixture 102.

[0096] The bristles B of the bristle group B132 are metal wires.

[0097] The flexible grinding disc B131 is sandpaper B. The sandpaper B is bent in the middle and its two ends are fixed to the inner wall of the outer wall grinding head 105. The grinding surface of the sandpaper B is located on the outer side after bending.

[0098] The two ends of the sandpaper B are attached together and then fixed to the inner wall of the outer wall grinding head 105.

[0099] When the pressure cover A103 moves upward to its maximum stroke, the bottom of the pressure cover A103 is located at the top of the steel pipe 9 fixed to the clamp 102. When the outer wall grinding head 105 moves upward to its maximum stroke, the bottom of the outer wall grinding head 105 is higher than the bottom of the pressure cover A103 when it moves upward to its maximum stroke. When the outer wall grinding head 105 moves downward to its maximum stroke, the bottom of the outer wall grinding head 105 is lower than the bottom of the steel pipe 9 fixed to the clamp 102.

[0100] The top of the side door A101 is higher than the bottom of the pressure cover A103 when it moves upward to its maximum stroke, and the bottom of the side door A101 is higher than the connection between the mesh plate 108 and the cylinder A100 and lower than the top surface of the clamp 102.

[0101] A partition 206 is fixedly installed in the lower part of the vertical cylinder B200. The paint liquid outlet pipe 205 extends upward from the center of the partition 206. The turntable 203 is rotatably connected to the top center of the partition 206. One end of the paint liquid outlet pipe 205 extends upward through the turntable 203. A paint storage cavity 207 is formed between the partition 206 and the bottom B226 of the vertical cylinder B200. A paint pump 222 is fixedly installed in the paint storage cavity 207. The paint liquid outlet pipe 205 is correspondingly connected to the outlet of the paint pump 222.

[0102] The partition 206 is horizontal at the position corresponding to the turntable 203. The partition 206 at the side wall position corresponding to the turntable 203 and the connection between the edge of the partition 206 and the connecting cylinder B200 form a conical arc surface structure that slopes downward from the inside to the outside. Multiple liquid drop holes 227 are evenly provided at the edge where the partition 206 connects to the cylinder B200.

[0103] The bottom of the cylinder B226 is a conical arc surface structure that slopes upward from the center to the edge. A drain port 208 is connected to the center of the bottom of the cylinder B226, and a drain valve 225 that can be opened and closed is connected to the lower part of the drain port 208.

[0104] The paint pump 222 is fixed inside the drain pipe 208 at a position above the drain valve 225. The inlet 224 of the paint pump 222 faces downward and is located at the position of the drain valve 225. The pump drive motor 223 of the paint pump 222 is fixedly connected to the corresponding position on the outer wall of the bottom of the cylinder B226 or the corresponding position on the outer wall of the drain pipe 208.

[0105] A central tube 228 is coaxially provided at the top center of the partition 206. The outer diameter of the paint outlet pipe 205 matches the inner diameter of the central tube 228. The paint outlet pipe 205 extends upward through the central tube 228. The turntable 203 is rotatably connected to the central tube 228 through bearing B.

[0106] A flexible sealing gasket 210 is fixed on the top surface of the turntable 203, and the paint liquid outlet pipe 205 extends upward through the central hole 229 provided in the center of the flexible sealing gasket 210.

[0107] The diameter of the central hole 229 is an interference fit with the outer diameter of the paint outlet pipe 205.

[0108] The top of the flexible sealing gasket 210 is uniformly provided with a plurality of radial flexible protrusions 211, which extend from the inner edge of the flexible sealing gasket 210 in contact with the paint outlet pipe 205 to the outer edge of the flexible sealing gasket 210.

[0109] The bottom edge of the pressure cover B204 is an annular conical arc surface B that slopes downward from the inside out. The top of the pressure cover B204 is coaxially fixed with the output shaft 214 at the bottom of the rotary drive motor 213. The rotary drive motor 213 is connected to the vertical cylinder B200 by a lifting drive piston B212, which is fixed to the top of the vertical cylinder B200. The outer diameter of the steel pipe 9 is larger than the inner diameter of the annular conical arc surface B and smaller than the outer diameter of the annular conical arc surface B.

[0110] The bottom surface of the pressure cover B204 is provided with a plurality of rigid protrusions 217 uniformly arranged around the axis of the pressure cover B204 at the position corresponding to the position of the annular conical surface B. The rigid protrusions 217 are arranged along the normal direction of the corresponding position of the annular conical surface B.

[0111] A reinforcing ring B221 is fixedly fitted on the outer side of the pressure cover B204. The reinforcing ring B221 includes a top annular horizontal plate B. An annular vertical plate B is fixedly fixed downward along the outer edge of the annular horizontal plate B, forming an "L" shaped cross-section. The inner edge of the annular horizontal plate B is fixedly connected to the outer wall of the annular conical surface B of the pressure cover B204. The outer edge of the annular conical surface B is fixedly connected to the inner wall of the annular vertical plate B. The bottom edge of the annular vertical plate B extends downward from the outer edge of the annular conical surface B.

[0112] The bottom edge of the pressure cover B204 is also fixedly provided with an annular sleeve 218. The top edge of the annular sleeve 218 is coaxially fixed at the connection between the inner wall of the annular vertical plate B and the annular conical arc surface B. The bottom edge of the annular sleeve 218 extends downward beyond the bottom edge of the annular vertical plate B. The inner diameter of the annular sleeve 218 is equal to the outer diameter of the edge of the pressure cover B204.

[0113] The top surface of the vertical cylinder B200 is fixedly provided with a lifting guide cylinder 215. The lifting drive piston B212 is fixed to the top surface of the lifting guide cylinder 215. The end of the telescopic rod B extending out of the lifting drive piston B212 extends downward into the lifting guide cylinder 215 and is fixed to the rotary drive motor 213. The inner wall of the lifting guide cylinder 215 matches the side wall of the rotary drive motor 213. The top of the vertical cylinder B200 is located within the range of the lifting guide cylinder 215, and a guide limiting tube 216 is fixedly provided corresponding to the output shaft 214 of the rotary drive motor 213. The end of the output shaft 214 of the rotary drive motor 213 extends downward through the guide limiting tube 216 and is fixedly connected to the top center of the pressure cover B204 coaxially. When the lifting drive piston B212 drives the rotary drive motor 213 to move upward to the maximum stroke position inside the lifting guide cylinder 215, the pressure cover B204 moves upward to contact the bottom of the guide limiting tube 216.

[0114] The top of the pressure cover B204 is coaxially fixed with a guide tube 219. The inner wall of the guide tube 219 matches the outer wall of the guide limiting riser 216. When the lifting drive piston B212 drives the rotation drive motor 213 to move upward to the maximum stroke position inside the lifting guide cylinder 215, the guide tube 219 moves upward to the top and contacts the top of the riser B200. When the lifting drive piston B212 drives the rotation drive motor 213 to move downward to the maximum stroke position inside the lifting guide cylinder 215, the top of the guide tube 219 is still higher than the bottom of the guide limiting riser 216.

[0115] A reinforcing ring A220 is coaxially fixed to the outer wall at the connection position between the bottom of the guide tube 219 and the pressure cover B204. The reinforcing ring A220 includes an annular horizontal plate A at the top, and an annular vertical plate A is coaxially fixed downward along the outer edge of the annular horizontal plate A, forming an "L" shaped cross-section. The inner edge of the annular horizontal plate A is fixed to the outer wall of the guide tube 219. The bottom of the annular horizontal plate A is in close contact with the top of the pressure cover B204. The bottom edge of the annular vertical plate A is coaxially fixed to the outer wall of the annular conical surface B.

[0116] The connection point between the annular vertical plate A and the annular conical arc surface B is located above the connection point between the annular horizontal plate B and the annular conical arc surface B.

[0117] The bottom of the lifting drive piston 109 is fixed to the top surface of the vertical cylinder A100.

[0118] The distance between the two sides of the side door B201 is greater than the outer diameter of the steel pipe 9.

[0119] The top of the side door B201 is higher than the bottom of the pressure cover B204 when it moves upward to its maximum stroke, and the bottom of the side door B201 is higher than the connection between the partition 206 and the cylinder B200 and lower than the top surface of the turntable 203.

[0120] like Figure 1 , Figure 9 and Figure 10As can be seen, when using this application, the side door A101 is opened, and the lifting drive piston A109 drives the pressure cover A103 to move upward to the maximum stroke. Then, the lifting drive motor A113 drives the inner wall grinding head 104 to move upward to the maximum stroke, and the lifting drive motor B129 drives the outer wall grinding head 105 to move upward to the maximum stroke. One of the steel pipes 9 from the replaced scaffolding steel pipes that have peeled paint or even rusted on the surface is inserted into the vertical cylinder A100 from the position where the side door A101 is opened. Then, the top end of the steel pipe 9 is placed upward on the inner wall grinding head 104. Then, the steel pipe 9 is moved downward until the bottom end of the steel pipe 9 is placed vertically at the center of the top surface of the clamp 102. Then, by turning the screw 141, each slider 140 on the top surface of the clamp 102 moves simultaneously inward along the radial direction of its corresponding clamp 102 until it is clamped. The bottom of the outer wall of the steel pipe 9 or the bottom of the inner wall of the steel pipe 9 is moved outward to clamp the bottom of the inner wall of the steel pipe 9. At this time, the inner wall grinding head 104 contacts the top of the inner wall of the steel pipe 9. Then, the lifting drive piston A109 drives the pressure cover A103 to move downward to contact the top of the steel pipe 9 and press it downward to fix the steel pipe 9 coaxially between the clamp 102 and the pressure cover A103. Then, the side door A101 is closed and the cyclone separator dust collector 3 connected to the chip discharge hole 106 is started. Then, the grinding drive motor A112 drives the inner wall grinding head 104 to rotate to grind the inner wall of the steel pipe 9, the grinding drive motor B128 drives the outer wall grinding head 105 to rotate, and the lifting drive motor A113 drives the inner wall grinding head 104 to move downward. In addition, the lifting drive motor B129 drives the outer wall grinding head 105 to move downward, so that the outer wall grinding head 105 moves downward to contact the outer wall of the steel pipe 9 and grinds it.When the inner wall grinding head 104 moves downward to contact the clamp 102, the lifting drive motor A113 drives the inner wall grinding head 104 upward; when the outer wall grinding head 105 moves downward to its maximum stroke, the lifting drive motor B129 drives the outer wall grinding head 105 upward; when the inner wall grinding head 104 moves upward to its maximum stroke again, the lifting drive motor A113 drives the inner wall grinding head 104 downward again; when the outer wall grinding head 105 moves upward to its maximum stroke again, the lifting drive motor B129 drives the outer wall grinding head 105 downward again; the inner wall grinding head 104 and the outer wall grinding head 105 move up and down repeatedly until the paint and rust on the inner and outer surfaces of the steel pipe 9 are cleaned; during the grinding process, the paint chips, rust chips, metal chips, and grinding disc fragments ground off the surface of the steel pipe 9 are all under the negative pressure of the cyclone separator dust collector 3. Under the action of the chip discharge hole 142, the chip enters the chip collection chamber 143, and then enters the cyclone separator dust collector 3 through the chip discharge hole 106; finally, the lifting drive motor A113 drives the inner wall grinding head 104 to move upward to the starting position of the maximum stroke, and the lifting drive motor B129 drives the outer wall grinding head 105 to move upward to the starting position of the maximum stroke; after waiting for the cyclone separator dust collector 3 to continue working for a period of time, the cyclone separator dust collector 3 stops working; then the side door A101 is opened, and the lifting drive piston A109 drives the pressure cover A103 to move upward to the maximum stroke position, and then the clamp 102 is loosened from the steel pipe 9 by turning the screw 141. Finally, the ground steel pipe 9 is taken out from the vertical cylinder A100, and the previous operation is repeated to put another steel pipe 9 to be ground into the vertical cylinder A100 for grinding.

[0121] In addition, the polished steel pipe 9 needs to be painted again. The operation is as follows: Open the side door B201 and move the lifting drive piston B212 to move the pressure cover B204 upward to its maximum stroke. Then, add paint into the vertical cylinder B200 from the position where the side door B201 is open. The paint is slowly added onto the partition 206 inside the vertical cylinder B200. The paint poured onto the partition 206 will flow along the inclined direction of the partition 206 towards the edge of the partition 206, and finally enter the paint storage chamber 207 through the drop hole 227 at the edge of the partition 206. Then, insert the polished steel pipe 9 into the vertical cylinder B200 from the position where the side door B201 is open, and then place the bottom end of the steel pipe 9 vertically on the flexible sealing surface of the turntable 203. The radial flexible protrusion 211 of the sealing layer 210 is placed on the bottom end of the steel pipe 9 and coaxially fitted onto the paint outlet pipe 205. Then, the lifting drive piston B212 drives the pressure cover B204 to move downwards until it contacts and presses against the top end of the steel pipe 9. At this time, the pressure cover B204 presses against the steel pipe 9 and drives the bottom end of the steel pipe 9 to squeeze the radial flexible protrusion 211 downwards, so that the flexible sealing layer 210 and the bottom end of the steel pipe 9 are sealed. Then, the side door B201 is closed and the pump drive motor 223 is started so that the paint pump 222 pumps the paint stored in the paint storage chamber 207 into the steel pipe 9 through the paint outlet pipe 205. As the paint is continuously pumped in, the paint level in the steel pipe 9 gradually rises until the paint level reaches the top end of the steel pipe 9. At this time, the paint outlet pipe 205 continues to pump paint into the steel pipe 9, causing the paint in the steel pipe 9 to overflow outward along the top edge of the steel pipe. The overflowing paint flows down from the outer wall of the steel pipe 9 and the annular sleeve 218, forming an annular waterfall shape. The overflowing paint then flows down the outer wall of the steel pipe 9 onto the flexible sealing gasket layer 210, and continues to flow down onto the partition 206. It then flows down the inclined direction of the partition 206 to the edge, and finally flows back into the paint storage chamber 207 through the drop hole 227. After the paint in the steel pipe 9 has overflowed for a period of time, so that the outer wall surface of the steel pipe 9 is completely covered with paint, the pump drive motor 223 is turned off, so that the paint pump 222 no longer pumps the paint stored in the paint storage chamber 207. The liquid is pumped into the steel pipe 9; then, the lifting drive piston B212 drives the pressure cover B204 to move slightly upward, so that the steel pipe 9 moves upward under the elastic restoring force of the compressed radial flexible protrusion 211 and the flexible sealing pad 210. At this time, a gap is formed between the bottom end of the steel pipe 9 and the flexible sealing pad 210 due to the shape recovery of the radial flexible protrusion 211, causing the paint liquid accumulated in the steel pipe 9 to be quickly discharged from the gap between the bottom end of the steel pipe 9 and the flexible sealing pad 210, and flow along the partition 206 to the edge until it flows back into the paint storage cavity 207 through the liquid drop hole 227; and at this time, the pressure cover B204 still exerts a certain force on the steel pipe 9, so that the steel pipe 9 is still fixed between the pressure cover B204 and the turntable 203;After the paint accumulated inside the steel pipe 9 has been almost completely drained, the drive motor 213 is started, causing the pressure cover B204, the steel pipe 9, and the turntable 203 to rotate synchronously. This causes the excess paint on the outer surface of the steel pipe 9 to be thrown outward under centrifugal force, thereby reducing the amount of paint on the outer surface of the steel pipe 9. Furthermore, due to the high surface tension of the paint, the paint on the inner surface of the steel pipe 9 will continuously flow downward and be thrown outward from the bottom of the steel pipe 9 due to the continuous throwing out of the paint at the bottom of the inner wall under centrifugal force, thus also reducing the amount of paint on the inner surface of the steel pipe 9. In other words, the paint layer thickness on both the inner and outer surfaces of the steel pipe 9 is reduced. The drive motor 213 is rotated repeatedly in both directions to minimize the amount of paint on the inner and outer surfaces of the steel pipe 9. After the drive motor 213 has been rotated repeatedly in both directions, it is turned off for a period of time. Then, the side door B201 is reopened. The operator, using tools or wearing chemical-resistant gloves, holds the steel pipe 9 in place. The lifting drive piston B212 then moves the pressure cover B204 upwards to its maximum stroke. At this point, the steel pipe 9 is removed from the vertical cylinder B200 and placed on a steel pipe rack in the temporary drying room 4. The steel pipe is then placed on the rack for paint drying. The air inlet of the drying room 4 is connected to the outlet of the cyclone separator dust collector 3 via duct B6. The outlet of the drying room 4 is connected to the waste gas treatment device 8 and then to the ventilation pipe 147 at the top of the vertical cylinder A100 via duct C7.

[0122] Before the end of each construction day, after all the steel pipes 9 that need to be ground have been ground, place the waste collection device at the bottom of the cyclone separator dust collector 3, and open the slag discharge port at the bottom of the cyclone separator dust collector 3 to collect the waste. The collected waste is then packaged and transferred to the recycling and processing area.

[0123] Before the end of each construction day, after all the steel pipes 9 that need to be painted have been painted, place the paint recovery bucket at the bottom of the vertical cylinder B200 directly below the drain pipe 208, and then open the drain valve 225 to drain as much paint as possible from the vertical cylinder B200 into the paint recovery bucket. Then close the drain valve 225, seal the paint recovery bucket for safekeeping, and place the waste liquid recovery bucket directly below the drain pipe 208. Then open the side door B201 and introduce the paint cleaning agent into the vertical cylinder B200. The paint cleaning agent will flow along the partition 206 to the edge and then enter the paint storage chamber 207 through the drop hole 227, so that the paint cleaning agent can clean the paint residue in the paint storage chamber 207. Then close the side door B201. Next, the pump drive motor 223 starts, the lifting drive piston B212 drives the pressure cover B204 to move downward to the maximum stroke, and the rotation drive motor 213 starts, so that the paint cleaning agent can fully clean the paint residue in the vertical cylinder B200. After cleaning is completed, turn off the pump drive motor 223 and the rotation drive motor 213. Then, the lifting drive piston B212 drives the pressure cover B204 to move upward to the maximum stroke. After standing for a period of time, open the drain valve 225 to discharge the waste liquid in the vertical cylinder B200 into the waste liquid recovery tank. Finally, after the drain pipe 208 stops discharging for a period of time, close the drain valve 225 and seal the waste liquid recovery tank for recycling.

Claims

1. A scaffolding steel pipe construction site paint touch-up system, characterized by: The system includes a steel pipe grinding device (1), a steel pipe painting device (2), a cyclone separator dust collector (3), and a drying chamber (4), with the drying chamber (4) located next to the steel pipe painting device (2). The steel pipe grinding device (1) includes a vertical cylinder A (100) supported by a support leg A (107). The side wall of the vertical cylinder A (100) is provided with an openable and closable side door A (101). A clamp (102) for clamping the bottom end of the steel pipe (9) is fixedly provided inside the vertical cylinder A (100). The top of the vertical cylinder A (100) is... A vertically movable pressure cover A (103) is provided coaxially above the clamp (102). Inside the vertical cylinder A (100), corresponding to the axis of the pressure cover A (103), a vertically movable inner wall grinding head (104) is also provided. Inside the vertical cylinder A (100), corresponding to the outer side of the pressure cover A (103), a vertically movable outer wall grinding head (105) is provided coaxially. The top of the vertical cylinder A (100) is provided with a vent pipe (147) on the side where the side door A (101) is located. The bottom of the vertical cylinder A (100) is provided with a... Chip removal hole (106), the chip removal hole (106) is connected to the air inlet of cyclone separator (3) through air duct A (5), the air outlet of cyclone separator (3) is connected to the air inlet of drying chamber (4) through air duct B (6), the air outlet of drying chamber (4) is connected to waste gas treatment device (8) and then connected to ventilation pipe (147) through air duct C (7); the steel pipe painting device (2) includes a vertical cylinder B (200) supported by support leg B (209), the side wall of the vertical cylinder B (200) A side door B (201) that can be opened and closed is provided. A turntable (203) is provided at the bottom inside the vertical cylinder B (200) and is rotatably connected around a vertical axis. A paint liquid outlet pipe (205) is fixed inside the vertical cylinder B (200) at the axis corresponding to the turntable (203). The outlet of the paint liquid outlet pipe (205) extends upward out of the turntable (203). A pressure cover B (204) that can move up and down is provided at the top inside the vertical cylinder B (200) and coaxially above the turntable (203). The pressure cover B (204) is rotatably connected around the axis. A flexible sealing pad (210) is fixed on the top surface of the turntable (203), and the paint liquid outlet pipe (205) extends upward through the central hole (229) provided in the center of the flexible sealing pad (210); a plurality of radial flexible protrusions (211) are uniformly provided on the top of the flexible sealing pad (210), and the radial flexible protrusions (211) extend from the inner edge of the flexible sealing pad (210) in contact with the paint liquid outlet pipe (205) to the outer edge of the flexible sealing pad (210); The bottom edge of the pressure cover B (204) is an annular conical arc surface B that slopes downward from the inside out. The top of the pressure cover B (204) is fixed coaxially with the output shaft (214) at the bottom of the rotary drive motor (213). The rotary drive motor (213) is connected to the vertical cylinder B (200) by a lifting drive piston B (212). The lifting drive piston B (212) is fixed to the top of the vertical cylinder B (200). The outer diameter of the steel pipe (9) is larger than the inner diameter of the annular conical arc surface B and smaller than the outer diameter of the annular conical arc surface B. The bottom surface of the pressure cover B (204) is uniformly provided with multiple rigid protrusions (217) at the position corresponding to the annular conical arc surface B, with the axis of the pressure cover B (204) as the center. The rigid protrusions (217) are arranged along the normal direction at the corresponding position of the annular conical arc surface B. A lifting guide cylinder (215) is fixedly provided on the top surface of the vertical cylinder B (200). The lifting drive piston B (212) is fixed on the top surface of the lifting guide cylinder (215). The end of the telescopic rod B extending out of the lifting drive piston B (212) extends downward into the lifting guide cylinder (215) and is fixed to the rotary drive motor (213). The inner wall of the lifting guide cylinder (215) matches the side wall of the rotary drive motor (213). The top of the vertical cylinder B (200) is located within the range of the lifting guide cylinder (215) and a guide limiting tube (216) is fixedly provided corresponding to the output shaft (214) of the rotary drive motor (213). The end of the output shaft (214) of the rotary drive motor (213) extends downward through the guide limiting tube (216) and is coaxially fixedly connected to the top center of the pressure cover B (204). When the lifting drive piston B (212) carries When the rotating drive motor (213) moves upward to the maximum stroke position inside the lifting guide cylinder (215), the pressure cover B (204) moves upward to contact the bottom of the guide limiting riser (216); the top of the pressure cover B (204) is coaxially fixed with a guide tube (219), the inner wall of the guide tube (219) matches the outer wall of the guide limiting riser (216). When the lifting drive piston B (212) drives the rotating drive motor (213) to move upward to the maximum stroke position inside the lifting guide cylinder (215), the guide tube (219) moves upward to the top and contacts the top of the riser B (200). When the lifting drive piston B (212) drives the rotating drive motor (213) to move downward to the maximum stroke position inside the lifting guide cylinder (215), the top of the guide tube (219) is still higher than the bottom of the guide limiting riser (216). By pressing down the cover B (204), the flexible sealing gasket (210) forms a seal between itself and the bottom end of the seamless steel pipe and between itself and the paint outlet pipe (205), so that the paint can fill the inner wall of the seamless steel pipe and overflow outward to paint the outer wall surface of the steel pipe.

2. The scaffolding steel pipe construction site touch-up painting system as described in claim 1, characterized in that: A horizontally arranged mesh plate (108) is fixedly installed in the lower part of the vertical cylinder A (100). The clamp (102) is fixed on the mesh plate (108). A chip-gathering cavity (143) is formed between the bottom A (144) of the vertical cylinder A (100) and the mesh plate (108) below it.

3. The scaffolding steel pipe construction site touch-up painting system as described in claim 1, characterized in that: The inner wall grinding head (104) is connected to the grinding drive motor A (112). The grinding drive motor A (112) is fixed to one end of the rigid transmission chain (114). The other end of the rigid transmission chain (114) extends upward through the vertical cylinder A (100) and into the rigid transmission chain storage box (115). The rigid transmission chain storage box (115) is provided with a storage groove (121) that matches the rigid transmission chain (114). The rigid transmission chain storage box (115) is also rotatably provided with a drive sprocket (118) that is connected to the rigid transmission chain (114) in the storage groove (121). The drive sprocket (118) is coaxially fixed to the lifting drive motor A (113). The lifting drive motor A (113) is fixed to the outer wall of the rigid transmission chain storage box (115).

4. The scaffolding steel pipe construction site touch-up painting system as described in claim 1, characterized in that: The inner wall grinding head (104) has a plurality of flexible grinding discs A (116) uniformly fixed on its sidewall. The flexible grinding discs A (116) are respectively arranged along the radial direction of the inner wall grinding head (104), and the plane of each flexible grinding disc A (116) passes through the axis of the inner wall grinding head (104). The sidewall of the inner wall grinding head (104) and between two adjacent flexible grinding discs A (116) are also fixed with a bristle group A (117). The plane of each bristle group A (117) passes through the axis of the inner wall grinding head (104), and the bristles A of each bristle group A (117) are arranged in parallel.

5. The on-site paint touch-up system for scaffolding steel pipes as described in claim 1, characterized in that: The outer wall grinding head (105) has a ring structure. Multiple lifting carriages (126) are evenly distributed on the outer side wall of the outer wall grinding head (105). The transmission gears B (134) on the lifting carriages (126) mesh with guide racks (135) at corresponding positions on the inner wall of the vertical cylinder A (100). Each lifting carriage (126) has a limiting groove (127) matching the outer wall grinding head (105) on its side facing the outer wall grinding head (105). The outer edge of the outer wall grinding head (105) extends into the limiting groove (127). 5) A gear ring (145) is coaxially provided on the outer edge. A transmission gear A (130) that meshes with the gear ring (145) is rotatably connected in the limiting groove (127). One of the lifting vehicles (126) is fixedly provided with a grinding drive motor B (128). The transmission gear A (130) of the lifting vehicle (126) is connected to the grinding drive motor B (128). One of the lifting vehicles (126) is fixedly provided with a lifting drive motor B (129). The transmission gear B (134) of the lifting vehicle (126) is connected to the lifting drive motor B (129).

6. The scaffolding steel pipe construction site touch-up painting system as described in claim 1, characterized in that: The inner sidewall of the outer wall grinding head (105) is uniformly fixed with a plurality of flexible grinding discs B (131). The flexible grinding discs B (131) are respectively arranged along the radial direction of the outer wall grinding head (105), and the plane of each flexible grinding disc B (131) passes through the axis of the outer wall grinding head (105). The sidewall of the outer wall grinding head (105) and between two adjacent flexible grinding discs B (131) are also fixed with a bristle group B (132). The plane of each bristle group B (132) passes through the axis of the outer wall grinding head (105), and the bristles B of each bristle group B (132) are arranged in parallel.

7. The scaffolding steel pipe construction site touch-up painting system as described in claim 1, characterized in that: A partition (206) is fixedly installed in the lower part of the vertical cylinder B (200). The paint liquid outlet pipe (205) extends upward from the center of the partition (206). The turntable (203) is rotatably connected to the top center of the partition (206). One end of the paint liquid outlet pipe (205) extends upward through the turntable (203). A paint storage cavity (207) is formed between the bottom B (226) of the vertical cylinder B (200) and the partition (206) below the vertical cylinder B (200). A paint pump (222) is fixedly installed in the paint storage cavity (207). The paint liquid outlet pipe (205) is connected to the outlet of the paint pump (222).

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