Steel pipe interval warning paint coloring method

Abstract

The invention belongs to the technical field of grinding, polishing and surface fluid coating in operation transportation, and particularly relates to a steel pipe interval warning paint coloring method which is implemented on the basis of equipment and comprises the steps of 1) clamping and feeding, 2) first-time coloring and 3) second-time coloring. The equipment comprises two longitudinal fixed sliding rails, and a first painting box assembly and a second painting box assembly which are spaced in the longitudinal direction are arranged between the two fixed sliding rails; the first painting box assembly and the second painting box assembly respectively comprise a transverse painting box, a plurality of dye adsorption blocks are arranged on the painting boxes at intervals in the transverse direction, and the upper surfaces of the dye adsorption blocks are flush and exposed out of the painting boxes; the dye adsorption blocks of the first painting box assembly and the second painting box assembly are staggered in the transverse direction; a movable supporting frame assembly is arranged on the two fixed sliding rails in a sliding mode, and the movable supporting frame assembly comprises two symmetrical movable supporting frames arranged on the two fixed sliding rails in a one-to-one mode. According to the method, the problem that the interval warning paint on the outer surface of the pipe fitting is inconvenient to color can be avoided, and the process of painting the interval warning paint on the outer surface of the pipe fitting is efficiently completed.

Description

Technical Field

[0001] The present invention belongs to the technical field of grinding, polishing and surface coating with fluid in operation transportation, and particularly relates to a method for coloring warning paint at intervals on steel pipes. Background Art

[0002] In scenarios such as construction, factory manufacturing, and road maintenance, it is usually necessary to establish isolation areas to serve as warnings and prevent unauthorized personnel from approaching and entering. The fences used to establish isolation areas usually adopt tubular components, such as steel pipes, plastic pipes, etc. In order to play a more eye-catching warning role, warning paint needs to be sprayed on the outer surface of the pipe fittings, and common forms are red and white intervals or yellow and black intervals.

[0003] The operation of spraying or painting on the outer surface of pipe fittings is generally currently carried out manually by manpower, using a spray gun to spray paint or a brush to apply paint. The work efficiency is very low, the connection effect at the connection of the two colors at intervals is poor, and it is uneven; the thickness of the paint applied by brushing is usually also uneven, the surface brush marks are serious, the surface is not smooth after the paint is completed, and the reflective effect is poor.

[0004] In the prior art, there are also some pipe fitting rust removal and painting integrated devices such as those disclosed in CN220613488U, but they can only spray single-color paint on the surface of pipe fittings and cannot meet the requirement of applying two-color interval warning paint. Summary of the Invention

[0005] Aiming at the above deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a method for coloring warning paint at intervals on steel pipes, to avoid the problem of inconvenient coloring of interval warning paint on the outer surface of pipe fittings, and to achieve the effect of efficiently completing the axial interval warning coating on the outer surface of pipe fittings through mechanical equipment, improving quality and efficiency.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] Coating method for warning paint at intervals on steel pipes. This method is implemented based on a coating device. The coating device includes two fixed sliding rails extending longitudinally. Between the two fixed sliding rails, there are a first coating box assembly and a second coating box assembly spaced at intervals along the longitudinal extension direction. The first coating box assembly and the second coating box assembly each include a coating box extending transversely between the two fixed sliding rails. On the coating box, there are a number of dye adsorption blocks spaced at intervals along the transverse extension direction. The upper surfaces of the dye adsorption blocks are flush and exposed above the upper surface of the coating box. The dye adsorption blocks of the first coating box assembly and the dye adsorption blocks of the second coating box assembly are staggered in the transverse extension direction. On the two fixed sliding rails, there is a moving support frame assembly slidably provided. The moving support frame assembly includes two moving support frames symmetrically arranged one by one on the two fixed sliding rails. The moving support frame includes a longitudinal movement base slidably connected to the fixed sliding rail along the longitudinal extension direction. An elevating seat is connected to the longitudinal movement base in a lifting manner. A self-rotating chuck for clamping the steel pipe is connected to the elevating seat. The self-rotating chucks on the two moving support frames are arranged oppositely to clamp the two ends of the steel pipe respectively.

[0008] This method includes the steps: 1) Clamping and loading.

[0009] The two moving support frames of the moving support frame assembly operate synchronously, first move to the front position of the first coating box assembly, place the steel pipe horizontally between the two moving support frames, and the two ends of the steel pipe are respectively clamped and fixed by the self-rotating chucks at the corresponding ends.

[0010] 2) First coating.

[0011] The moving support frame assembly slides along the fixed sliding rail, with the two longitudinal movement bases driving longitudinal sliding, and moves to the position longitudinally corresponding to the first coating box assembly. The two self-rotating chucks synchronously drive the steel pipe to continuously rotate around its own axis as the rotation center. The two elevating seats descend synchronously, and the outer circumferential surface of the steel pipe contacts each dye adsorption block on the first coating box assembly. Each dye adsorption block on the first coating box adsorbs the dye of "specified color one". After the steel pipe presses on each dye adsorption block and rotates for a certain period of time (at least one full rotation of the steel pipe should be ensured to ensure that the entire circumference of the steel pipe segment in contact with the dye adsorption block is coated. To ensure the coating effect, it can rotate multiple times), the first interval coating is completed. The elevating seat rises to lift the steel pipe.

[0012] 3) Second coating.

[0013] The movable support frame assembly moves to a position longitudinally corresponding to the second painting box assembly, and the two lifting seats descend synchronously. The outer circumferential surface of the steel pipe contacts each dye adsorption block on the second painting box assembly; each dye adsorption block on the second painting box assembly adsorbs the dye of "specified color two". After the steel pipe presses each dye adsorption block and rotates continuously for a certain period of time (at least one full rotation of the steel pipe should be ensured to guarantee that one circle of the steel pipe section in contact with the dye adsorption block is painted. To ensure the painting effect, it can rotate multiple circles), the second intermittent painting is completed.

[0014] To further improve the above technical solution, a laterally sliding upper seat is slidably connected to the lifting seat along the lateral extension direction, and the self-rotating chuck is connected through the laterally sliding upper seat.

[0015] Further, in the longitudinally extending direction of the fixed slide rail,

[0016] A surface cleaning mechanism located between the two fixed slide rails is provided in front of the first painting box assembly;

[0017] A first drying mechanism located between the two fixed slide rails is provided between the first painting box assembly and the second painting box assembly;

[0018] A second drying mechanism located between the two fixed slide rails is provided behind the second painting box assembly;

[0019] The number of the movable support frame assemblies is two and they are spaced apart in the longitudinally extending direction of the fixed slide rail, namely the first movable support frame assembly and the second movable support frame assembly. The first movable support frame assembly is used to transport the steel pipe between the surface cleaning mechanism, the first painting box assembly and the first drying mechanism; the second movable support frame assembly is used to transport the steel pipe between the first drying mechanism, the second painting box assembly and the second drying mechanism;

[0020] Step 1) is carried out by the first movable support frame assembly. Before step 2) after step 1), the first movable support frame assembly first moves the steel pipe to the surface cleaning mechanism to clean the outer circumferential surface of the steel pipe to be painted; then step 2) is entered;

[0021] Before step 3) after step 2), the first movable support frame assembly transports and places the steel pipe on the first drying mechanism, releases the steel pipe and leaves the first drying mechanism; then the second movable support frame assembly clamps the steel pipe on the first drying mechanism and enters step 3); after step 3) is completed, the second movable support frame assembly transports and places the steel pipe on the second drying mechanism.

[0022] Further, the painting equipment further includes a conveying mechanism, a detection mechanism, a rectifying mechanism and a sorting mechanism;

[0023] Step 3) After the second moving support frame assembly finishes transporting and placing the steel pipe on the second drying mechanism, release the steel pipe and leave the second drying mechanism; transport the steel pipe on the second drying mechanism through the conveying mechanism and move it towards the shaping mechanism. During the movement of the steel pipe towards the shaping mechanism, detect the painting effect of the steel pipe through the detection mechanism. When the steel pipe moves to the shaping mechanism, it is blocked and stops moving. Through the sorting mechanism, classify the steel pipes with qualified and unqualified painting effects. The unqualified steel pipes are laterally removed, and the qualified steel pipes are allowed to pass through by the action of the shaping mechanism and continue to move forward.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The method for painting the spaced warning paint on the steel pipe of the present invention can avoid the problem of inconvenient painting of the spaced warning paint on the outer surface of the pipe fittings, and achieve the effect of automatically applying the axially spaced warning paint on the outer surface of the pipe fittings by mechanical equipment, improving quality and efficiency.

[0026] 2. The method for painting the spaced warning paint on the steel pipe of the present invention can automatically supply materials, clean the surface of the steel pipe, dry, etc., with high integration and high automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Structural schematic diagram of the painting equipment for a specific embodiment (with steel pipe);

[0028] Figure 2 Stereogram of the painting equipment for a specific embodiment (without clamping the steel pipe);

[0029] Figure 3 For Figure 2 Top view of the equipment in

[0030] Figure 4 For Figure 3 A - A cross - sectional view in

[0031] Figure 5 For Figure 2 Side view of the equipment in

[0032] Figure 6 For Figure 5 B - B cross - sectional view in

[0033] Figure 7 For Figure 2 Structural schematic diagram of the equipment after functional integration on the basis of

[0034] Figure 8 For Figure 7 Side view of the equipment in

[0035] Figure 9 For Figure 7Stereogram of another perspective of the middle surface cleaning mechanism;

[0036] Figure 10 Schematic diagram of the structure of the cleaning main body in the surface cleaning mechanism;

[0037] Figure 11 For Figure 10 Stereogram of another perspective of the cleaning main body in

[0038] Figure 12 For Figure 11 Separate schematic diagram of the sliding base frame of the cleaning main body in

[0039] Figure 13 For Figure 10 Separate schematic diagram of the inner rotating frame of the cleaning main body in

[0040] Figure 14 For Figure 13 Front view of the inner rotating frame in

[0041] Figure 15 For Figure 14 Schematic diagram of placing a steel pipe on the inner rotating frame for rotary grinding in

[0042] Figure 16 For Figure 15 Schematic diagram of the first rotating state of the inner rotating frame in

[0043] Figure 17 For Figure 15 Schematic diagram of the second rotating state of the inner rotating frame in

[0044] Figure 18 For Figure 15 Schematic diagram of the third rotating state of the inner rotating frame in

[0045] Figure 19 For Figure 7 Stereogram of the drying mechanism in

[0046] Figure 20 Schematic diagram of the structure of the belt drive unit in the drying mechanism (with a steel pipe);

[0047] Figure 21 Partial stereogram of the belt drive unit in the drying mechanism;

[0048] Figure 22 Separate schematic diagram of the support block and the rotating placement unit in the drying mechanism;

[0049] Among them, there are a fixed slide rail 1, a steel pipe 100, a first moving support frame assembly 11, a second moving support frame assembly 12, a moving support frame 13, a longitudinal movement base 14, a lifting seat 15, a transverse movement upper seat 16, a self-rotating chuck 17, a surface cleaning mechanism 20, a lower cleaning box 21, a guide post 211, a driving lead screw 212, a semi-circular notch 213, a cleaning main body 22, a sliding base frame 23, a relief opening 231, a mounting groove 232, an internal thread hole 233, a guide hole 234, a driving motor 235, an internal rotating frame 24, an annular assembly groove 241, a telescopic driving source 242, a fixed roller 25, an adjusting roller 26, a first rotation driving source 261, a flexible grinding belt 27, a steel pipe grinding contact surface 271, an upper cleaning box 28, a dust removal cover body 29, a first painting box assembly 31, a second painting box assembly 32, a painting box 33, a receiving groove 331, a liquid accumulation pool 332, a relief arc groove 333, a liquid level display 34, a painting dye supply box 35, a supply pump 36, a dye adsorption block 37, a painting arc groove 371, a first drying mechanism 41, a second drying mechanism 42, a drying mechanism base 43, an end vertical plate 431, a linkage shaft 432, a second rotation driving source 433, a belt transmission unit 44, a belt transmission wheel 441, a transmission belt 442, a connecting convex block 443, a support block 45, a rotating placement unit 46, a rotating roller 461, a third rotation driving source 462, a drying box 47, a heating and drying unit 471, an air drying unit 472, a conveying mechanism 5, a detection mechanism 6, a regularization mechanism 7, and a sorting mechanism 8. Detailed implementation manners

[0050] The following further elaborates on the detailed implementation manners of the present invention in conjunction with the accompanying drawings.

[0051] Please refer to Figures 1 - 3, the painting method of warning paint for steel pipe intervals in specific embodiments. This method is implemented based on a painting device. The painting device includes two fixed sliding rails 1 extending longitudinally. Between the two fixed sliding rails 1, there are a first painting box assembly 31 and a second painting box assembly 32 spaced along their longitudinal extension directions. The first painting box assembly 31 and the second painting box assembly 32 each include a painting box 33 extending transversely between the two fixed sliding rails 1. On the painting box 33, there are a number of dye adsorption blocks 37 spaced along its transverse extension direction. The upper surfaces of the dye adsorption blocks 37 are flush and exposed above the upper surface of the painting box 33. The dye adsorption blocks 37 of the first painting box assembly 31 and the dye adsorption blocks 37 of the second painting box assembly 32 are staggered in the transverse extension direction. A moving support frame assembly is slidably provided on the two fixed sliding rails 1. The moving support frame assembly includes two moving support frames 13 provided in one-to-one correspondence on the two fixed sliding rails 1 and arranged symmetrically. The moving support frame 13 includes a longitudinal moving base 14 slidably connected to the fixed sliding rail 1 along the longitudinal extension direction. A lifting seat 15 is connected to the longitudinal moving base 14 in a lifting manner. A self-rotating chuck 17 for clamping the steel pipe 100 is connected to the lifting seat 15. The self-rotating chucks 17 on the two moving support frames 13 are arranged oppositely to clamp the two ends of the steel pipe 100 respectively. The first painting box assembly 31 and the second painting box 33 are always located between the two moving support frames 13 of the moving support frame assembly.

[0052] During use, the following method steps can be referred to:

[0053] 1) Clamping and loading;

[0054] The two moving support frames 13 of the moving support frame assembly run synchronously. First, they move to the front position of the first painting box assembly 31. The steel pipe 100 is horizontally placed between the two moving support frames 13. The two ends of the steel pipe 100 are respectively clamped and fixed by the self-rotating chucks 17 at the corresponding ends.

[0055] 2) First painting;

[0056] The moving support frame assembly moves longitudinally along the fixed slide rail 1 with the two longitudinal moving bases 14 until it reaches a position longitudinally corresponding to the first painting box assembly 31. The first painting box assembly 31 is located between the two moving support frames 13 of the moving support frame assembly. The steel pipe 100 clamped by the self-rotating chucks 17 on the two moving support frames 13 is located above the first painting box assembly 31. The two self-rotating chucks 17 synchronously drive the steel pipe 100 to continuously rotate around its own axis as the center of rotation. The two lifting seats 15 synchronously descend to lower the height of the steel pipe 100, causing the steel pipe 100 to press down, and the outer circumferential surface of the steel pipe 100 comes into contact with each dye adsorption block 37 on the first painting box assembly 31. The dye adsorption block 37 adsorbs the dye of "specified color one". After contacting the steel pipe 100, the dye can be dyed onto the contact surface with the steel pipe 100. Since the upper surfaces of the dye adsorption blocks 37 are flush and exposed above the upper surface of the painting box 33, the steel pipe 100 can be lowered to press on each dye adsorption block 37 and cause a certain elastic deformation of each dye adsorption block 37. The dye adsorption block 37 with a certain elastic deformation can more effectively transfer and coat the dye onto the contact surface with the steel pipe 100. Due to the continuous rotation of the steel pipe 100, each dye adsorption block 37 coats the adsorbed dye onto the outer circumferential surface of the steel pipe 100 in a corresponding circle. After the steel pipe 100 presses on each dye adsorption block 37 and continuously rotates for a certain period of time, the first intermittent painting is completed.

[0057] 3) Second painting;

[0058] After the first intermittent painting is completed, the two lifting seats 15 synchronously rise until the steel pipe 100 leaves each dye adsorption block 37 and returns above the first painting box assembly 31. The moving support frame assembly continues to move longitudinally along the fixed slide rail 1 with the two longitudinal moving bases 14 until it reaches a position longitudinally corresponding to the second painting box assembly 32. The second painting box assembly 32 is located between the two moving support frames 13 of the moving support frame assembly. The steel pipe 100 is located above the second painting box assembly 32. The two lifting seats 15 synchronously descend to lower the height of the steel pipe 100, causing the steel pipe 100 to press down, and the outer circumferential surface of the steel pipe 100 comes into contact with each dye adsorption block 37 on the second painting box assembly 32. Each dye adsorption block 37 on the second painting box assembly 32 adsorbs the dye of "specified color two". After the steel pipe 100 presses on each dye adsorption block 37 and continuously rotates for a certain period of time, the second intermittent painting is completed.

[0059] 4) Unloading;

[0060] After the second interval coloring is completed, the two lifting seats 15 are synchronously raised until the steel pipe 100 leaves the dye adsorption blocks 37 and returns to the top of the second coloring box assembly 32, and the two rotating chucks 17 stop rotating synchronously. The mobile support frame assembly continues to slide longitudinally along the fixed slide rail 1, along with the two longitudinally moving bases 14, and moves to the rear position of the second coloring box assembly 32. The two rotating chucks 17 release the clamping fixation of the steel pipe 100. The steel pipe 100 is removed.

[0061] The dye colors of the above-mentioned "designated color 1" and "designated color 2" are different, for example, "designated color 1" is yellow and "designated color 2" is black, or "designated color 1" is white and "designated color 2" is red. Also, because the dye adsorption blocks 37 of the first painting box assembly 31 and the dye adsorption blocks 37 of the second painting box assembly 32 are staggered in the lateral extension direction, it can be seen that Figure 3 After the first and second coloring is completed, a warning paint effect with different colors and axial intervals is formed on the outer circumferential surface of the steel pipe 100. The coloring process is completed automatically, the coloring effect is uniform, and the edges are neat. Manual work only needs to load and unload materials and add dye to the dye adsorption block 37 at a fixed time or in a fixed amount, thereby improving quality and efficiency.

[0062] During implementation, the axial length of different color segments and the length of each end of each segment covering the end of the adjacent segment of the first coloring during the second coloring are assigned to the length and spacing of each dye adsorption block 37 on the coloring box according to the actual process requirements. The material of the dye adsorption block 37 is selected from materials such as sponge, foam, etc. that have adsorption capacity, can meet the requirements of elastic deformation under pressure and dye the adsorbed dye onto the contact object. The self-rotating chuck 17 is similar to the chuck of a CNC lathe. The common chuck has three claws, which can move away from or approach each other radially, can be closed from the outside to clamp the outer wall of the steel pipe, and can also be opened from the inside to be fixed to the inner hole of the steel pipe. The chuck is rotatably connected in the chuck seat and can be rotated under the drive of the motor of the chuck seat. In order to purchase existing parts, it is not repeated.

[0063] In order to facilitate loading and unloading, the lifting seat 15 is slidably connected with a transverse upper seat 16 along the lateral extension direction, and the self-rotating chuck 17 is connected through the transverse upper seat 16. In this way, the problem of requiring a long length of the claws or the claws need to be opened as much as possible during assembly and disassembly in order to put the steel pipe on and off can be avoided; in order to allow the outer circumference of the steel pipe 100 including both ends to be fully painted, the self-rotating chuck 17 preferably has three claws radially away from each other and are opened and fixed to the inner hole of the steel pipe from the inside. During installation, the self-rotating chuck 17 is connected to the transverse upper seat 16, and they are separated from each other to make room. After the steel pipe is placed horizontally (one end can be overlapped first), they are brought close to each other to a set distance, and the two ends of the steel pipe are overlapped on the self-rotating chuck 17, and the claws are opened to fix the steel pipe. When loosening, the claws are slightly retracted, and then separated from each other with the help of the transverse upper seat 16, so that the steel pipe 100 can be unloaded.

[0064] During implementation, the longitudinal moving base 14, the lifting base 15 and the transverse moving upper base 16 all have corresponding sliding matching structures and driving mechanisms respectively. Together with the rotation of the self-rotating chuck 17, it is equivalent to satisfying the XYZ three-axis movement and Z-axis rotation on common automation equipment, a total of four axes of freedom. The specific structure and drive control are existing technologies and will not be repeated here.

[0065] See also Figures 4 - 6 The upper surface of the paint box 33 is recessed with a plurality of receiving grooves 331 for placing dye adsorption blocks 37, and the dye adsorption blocks 37 are placed one-to-one in the receiving grooves 331. The paint box 33 is also provided with a liquid accumulation pool 332 along its lateral extension direction, and the liquid accumulation pool 332 is connected with each receiving groove 331 at the bottom end of each receiving groove 331.

[0066] In this way, it is convenient to place and fix the position of the dye adsorption block 37, and the liquid accumulation pool 332 can increase the amount of dye stored each time. After a certain period of time and quantity of use, as long as the amount of dye stored in the liquid accumulation pool 332 is sufficient, the adsorption amount of dye on the dye adsorption block 37 can always be maintained, thereby ensuring the dyeing effect of the steel pipe, reducing the frequency of manual inspection and dye addition, and further releasing manpower.

[0067] Among them, the side wall of the liquid accumulation pool 332 is connected to a liquid level display 34 exposed on the side wall of the paint box 33; the side wall of the paint box 33 is also connected to a paint dye supply box 35, and the paint dye supply box 35 is connected to the liquid accumulation pool 332 through a supply pump 36, the suction end of the supply pump 36 is connected to the paint dye supply box 35, and the pump outlet end of the supply pump 36 is connected to the liquid accumulation pool 332.

[0068] In this way, it is convenient to observe whether the dye is sufficient; the dye is added to the liquid pool 332 through the coloring dye supply box 35 and the supply pump 36, which makes the operation more convenient. Furthermore, the liquid level display 34 with liquid level detection and signal connection to the controller is switched, and the controller controls the connection to the supply pump 36. When the dye in the liquid pool 332 is insufficient, the dye can be automatically replenished.

[0069] Specifically, in the longitudinal extension direction, the width of the liquid pool 332 is smaller than the width of the accommodating groove 331, and the centers of the widths of the two coincide, so that the dye adsorption block 37 is stably placed on both sides of the bottom wall of the accommodating groove 331; the upper surface of the coloring box 33 is also penetrated with a clearance arc groove 333 along its lateral extension direction, and the upper surface of the dye adsorption block 37 is penetrated with a coloring arc groove 371 along the lateral extension direction, and the depth of the coloring arc groove 371 is smaller than the clearance arc groove 333. When coloring, the steel pipe 100 is pressed down to contact the arc-shaped coloring arc groove 371, which is conducive to dyeing.

[0070] Only one liquid level display 34 can be used to display the overall liquid level height of the dye in the liquid accumulation tank 332 and each accommodating tank 331 communicating therewith. Based on the principle of equal liquid levels due to water pressure, the liquid level display 34 can adopt a transparent pipe fitting. The lower end is horizontally bent and connected to the side wall of the liquid accumulation tank 332, and the other end is exposed outside the painting box 33 and extends vertically upward by a certain height and remains unobstructed. In this embodiment, the liquid level display 34 is arranged one-to-one with the accommodating tank 331. The lower end is horizontally bent and connected to the side wall of the liquid accumulation tank 332 below the corresponding accommodating tank 331. The other end is exposed outside the painting box 33 and extends vertically upward by a certain height. The upper end is horizontally bent and connected to the upper part of the side wall of the corresponding accommodating tank 331. The dye adsorption block 37 is made of a porous and breathable material, which will not cause airtightness at the upper end of the liquid level display 34, ensuring the normal operation of the liquid level display 34. The exposed part is convenient for cleaning. And when the dye flow in the liquid accumulation tank 332 is not smooth, the amount of dye at the position of each accommodating tank 331 can be observed, avoiding insufficient painting effect on local pipe sections of the steel pipe due to insufficient dye in some parts.

[0071] The above are the basic components and structures of the painting equipment in the embodiment. By controlling the operation according to the introduced steps and methods, the function of interval painting of steel pipes can be achieved.

[0072] To further improve the production efficiency and quality of the equipment, the form of the equipment in this method is continuously integrated and improved. Please refer to Figure 7 、 Figure 8 In the longitudinal extension direction of the fixed slide rail 1,

[0073] A surface cleaning mechanism 20 located between the two fixed slide rails 1 is provided in front of the first painting box assembly 31;

[0074] A first drying mechanism 41 located between the two fixed slide rails 1 is provided between the first painting box assembly 31 and the second painting box assembly 32;

[0075] A second drying mechanism 42 located between the two fixed slide rails 1 is provided behind the second painting box assembly 32;

[0076] The number of the moving support assemblies is two sets and they are spaced apart in the longitudinal extension direction of the fixed slide rail 1, namely the first moving support assembly 11 and the second moving support assembly 12. The first moving support assembly 11 is used to transport the steel pipe between the surface cleaning mechanism 20, the first painting box assembly 31 and the first drying mechanism 41; the second moving support assembly 12 is used to transport the steel pipe between the first drying mechanism 41, the second painting box assembly 32 and the second drying mechanism 42.

[0077] In this way, it is convenient to improve efficiency and quality. Before the first painting, after clamping and loading on the first moving support frame assembly 11, the steel pipe 100 is first moved to the surface cleaning mechanism 20 to clean the outer circumferential surface of the steel pipe 100 to be painted, such as wiping, rust removal or polishing operations. With the steel pipe 100 being able to rotate with the self-rotating chuck 17 on the first moving support frame assembly 11, it is also convenient to implement the surface cleaning operation process. The surface cleaning can be manual operation, simple mechanical automation operation, etc., without limitation. For example, using a robotic arm to stick a wiping cotton to the steel pipe 100, the robotic arm moves horizontally, and with the rotation of the steel pipe 100, the cleaning of the entire outer circumferential surface of the steel pipe 100 can be completed.

[0078] After surface cleaning, the first moving support frame assembly 11 transports the steel pipe 100 to the first painting tank assembly 31 to complete the first painting.

[0079] After the first painting is completed, the first moving support frame assembly 11 transports the steel pipe 100 to the first drying mechanism 41 and places it on the first drying mechanism 41. Specifically, the two self-rotating chucks 17 stop rotating, the two lifting seats 15 descend to place the steel pipe on the first drying mechanism 41, the two self-rotating chucks 17 release the fixation of the steel pipe ends, and the two transverse upper seats 16 move away from each other. Disconnect the steel pipe. Then, the first moving support frame assembly 11 returns, leaves the first drying mechanism 41, clamps and loads the next steel pipe and repeats the foregoing process, shuttling between the surface cleaning mechanism 20, the first painting tank assembly 31 and the first drying mechanism 41.

[0080] The steel pipe after the first painting on the first drying mechanism 41 can be only supported and air-dried naturally, or efficiency-enhancing mechanisms such as heating drying and air-blowing drying can be added, without limitation.

[0081] After the dye for the first painting dries to an appropriate degree on the steel pipe 100, the second moving support frame assembly 12 longitudinally moves to the corresponding position of the first drying mechanism 41 and clamps the steel pipe. Specifically, the two lifting seats 15 descend to make the two self-rotating chucks 17 level with and corresponding to the two ends of the steel pipe, the transverse upper seats 16 move closer to each other, the jaws of the two self-rotating chucks 17 extend into the inner hole ends of the steel pipe, the jaws of the two self-rotating chucks 17 expand to fixedly connect the steel pipe, and the two lifting seats 15 rise to make the steel pipe 100 above the first drying mechanism 41. Then, it is sent to the second painting tank assembly 32 for the second painting.

[0082] After the second painting is completed, the second moving support frame assembly 12 transports the steel pipe 100 to the second drying mechanism 42 and places it on the second drying mechanism 42, disconnecting the steel pipe. Then, the second moving support frame assembly 12 returns, shuttling between the first drying mechanism 41, the second painting tank assembly 32 and the second drying mechanism 42.

[0083] After the dye applied for the second time is dried to a suitable degree on the steel pipe 100, it can be unloaded manually or by other mechanical equipment.

[0084] In this way, the steel pipe is painted twice by subdividing the steps and processes, which can more conveniently control the rhythm, improve efficiency and quality, and improve the functional integration of the equipment. During implementation, the mobile support frame assembly 12 is not limited to two, and can be reasonably matched and efficiently utilized in combination with the actual duration of each process.

[0085] See also Figures 9 - 14 The surface cleaning mechanism 20 includes a lower cleaning box 21 with an open upper end, the lower cleaning box 21 extends transversely between the two fixed slide rails 1, a cleaning body 22 is slidably arranged in the lower cleaning box 21 along its extension direction, and the cleaning body 22 includes a sliding base 23, and two fixed rollers 25 and an adjusting roller 26 arranged in a triangle are rotatably connected to the sliding base 23, the axial directions of the adjusting roller 26 and the two fixed rollers 25 are parallel and correspond to the transverse extension direction of the lower cleaning box 21, and a flexible grinding belt 27 is sleeved on the adjusting roller 26 and the two fixed rollers 25, the side of the flexible grinding belt 27 between the two fixed rollers 25 away from the adjusting roller 26 forms a steel pipe grinding contact surface 271, and the steel pipe grinding contact surface 271 is exposed on the upper surface of the lower cleaning box 21; any fixed roller 25 or the adjusting roller 26 is connected to a first rotation driving source 261; the adjusting roller 26 is slidably connected to the sliding base 23 so that the vertical distance from the adjusting roller 26 to the axis connecting the two fixed rollers 25 is adjustable, which can ensure that the flexible grinding belt 27 can give way appropriately and maintain tension when grinding the steel pipe.

[0086] Combined with the structure of the movable support frame assembly, the steel pipe grinding contact surface 271 of the flexible grinding belt 27 on the sliding base frame 23 is still exposed on the upper surface of the lower cleaning box 21. When in use, the first movable support frame assembly 11 moves along the fixed slide rail 1, along with the two longitudinally moving bases 14, to a position corresponding to the longitudinal direction of the surface cleaning mechanism 20. The lower cleaning box 21 is located between the two movable support frames 13 of the movable support frame assembly, and the steel pipe 100 is located above the lower cleaning box 21. The two lifting seats 15 descend synchronously to lower the height of the steel pipe 100, so that the steel pipe 100 is pressed downward, and the outer circumferential surface of the steel pipe 100 contacts the steel pipe grinding contact surface 271 of the flexible grinding belt 27, and is pressed downward appropriately, as can be seen in FIG. Figure 14 and Figure 15 During the pressing process, the adjusting roller 26 slides toward the steel pipe 100, and the flexible grinding belt 27 is appropriately loosened to allow the steel pipe to be pressed down and maintain tension. The first rotation driving source 261 drives the flexible grinding belt 27 to operate and grind and remove rust from the steel pipe. With the rotation of the steel pipe and the reciprocating sliding of the cleaning body 22 along the axial direction of the steel pipe, the outer circumference of the entire steel pipe 100 can be polished and rusted.

[0087] Among them, an inner rotating frame 24 is provided on the sliding base frame 23, and the adjusting roller 26 and two fixed rollers 25 are connected through the inner rotating frame 24; the inner rotating frame 24 is in the shape of a U-shaped ring, its axial direction corresponds to the transverse extension direction of the lower cleaning box 21, its open end is for the passage of the steel pipe, a coaxial annular assembly groove 241 is opened in the middle of the inner wall of the inner rotating frame 24, and the two ends of the fixed roller 25 are respectively rotatably connected to the two side walls of the annular assembly groove 241. The two fixed rollers 25 are symmetrically arranged relative to the inner rotating frame 24 and are located on the same radial line. The middle parts of the two end faces of the inner rotating frame 24 are respectively fixedly connected with telescopic drive sources 242. The telescopic working ends of the telescopic drive sources 242 are vertically oriented towards the axis of the inner rotating frame 24. The two ends of the adjusting roller 26 are respectively rotatably connected to the telescopic working ends of the two telescopic drive sources 242. The first rotation drive source 261 is arranged on any one of the telescopic working ends and is drivingly connected to the adjusting roller 26; the steel pipe grinding contact surface 271 faces the open end of the inner rotating frame 24; the inner rotating frame 24 is rotatably connected to the sliding base frame 23 with its axis as the rotation center.

[0088] In this way, a rotatable inner rotating frame 24 is added on the sliding base frame 23 as an intermediate transition member to connect each roller, and the flexible grinding belt 27 is tensioned on the inner rotating frame 24. During use, after the steel pipe is pressed down, it is located between the two fixed rollers 25 and at the central position of the inner rotating frame 24. Refer to Figures 14 - 16 ., the inner rotating frame 24 can swing reciprocally or rotate directionally appropriately under the driving action, improving the effect of grinding and rust removal of the steel pipe. The open end of the inner rotating frame 24 for the passage of the steel pipe can be made as small as possible. With only one driving source acting, the inner rotating frame 24 can swing reciprocally or rotate directionally appropriately, and thus the steel pipe itself does not need to rotate, improving the applicability of the surface cleaning mechanism 20, and it can also be used in the case where the steel pipe cannot rotate. The specific structural form of the sliding base frame 23 is not limited, and it can be in the form of a frame, a box, etc., as long as it can provide basic connection.

[0089] In this embodiment, a U-shaped relief opening 231 adapted to the inner rotating frame 24 is recessed and opened on the upper surface of the sliding base frame 23. The axial direction of the relief opening 231 corresponds to the transverse extension direction of the lower cleaning box 21. The open end of the relief opening 231 faces directly above the sliding base frame 23. The relief opening 231 penetrates through the sliding base frame 23 along the transverse extension direction. An installation groove 232 coaxial with the relief opening 231 is opened in the middle of the inner wall of the relief opening 231. The inner rotating frame 24 is rotatably placed in the installation groove 232. The diameter of the installation groove 232 matches the outer diameter of the inner rotating frame 24. The diameter of the relief opening 231 is smaller than the outer diameter of the inner rotating frame 24 and larger than the inner diameter of the inner rotating frame 24 to make room for the telescopic drive sources 242 connected to the end faces of the inner rotating frame 24.

[0090] An internal threaded hole 233 and two left-right symmetrical guide holes 234 are provided in the lower part of the sliding base 23 along the lateral extension direction, and the internal threaded hole 233 is located between the two guide holes 234. A guide column 211 is provided in the lower cleaning box 21 along the lateral extension direction and is rotatably connected to a driving screw rod 212. The sliding base 23 is slidably connected to the two guide columns 211 through the two guide holes 234. The internal threaded hole 233 of the sliding base 23 is threadedly connected to the driving screw rod 212. The rotation of the driving screw rod 212 drives the sliding base 23 to slide back and forth along the guide column 211. Semicircular notches 213 coaxial with the inner rotating frame 24 are provided on the upper edges of the end plates at both ends of the sliding base 23, and the diameter of the semicircular notch 213 matches the diameter of the inner wall of the inner rotating frame 24.

[0091] One or more drive motors 235 are fixedly connected to the sliding base 23. When there are multiple drive motors 235, each drive motor 235 is arranged at intervals along the circumference of the inner rotating frame 24. The output shaft of the drive motor 235 corresponds to the axial direction of the inner rotating frame 24 and is operatively connected to the outer wall of the inner rotating frame 24 to drive the inner rotating frame 24 to swing or rotate. This embodiment shows three drive motors 235. The output shaft of the drive motor 235 is in contact with the outer wall of the inner rotating frame 24, preferably through friction transmission. Figures 15 - 18 , showing the process of rotary grinding of steel pipe 100, during which steel pipe 100 may rotate or not. When manufacturing the equipment, the sliding base frame 23 may be configured as a radially split assembly part, so as to facilitate the installation of the inner rotating frame 24 into the clearance opening 231 and the connection of the driving motor 235 and its output shaft.

[0092] The surface cleaning mechanism 20 also includes an upper cleaning box 28 that can be raised and lowered and is located above the lower cleaning box 21. The upper cleaning box 28 extends horizontally between the two fixed slide rails 1 and is open at the lower end. A dust cover 29 is slidably arranged in the upper cleaning box 28 along its extension direction. The dust cover 29 has a dust suction chamber facing the sliding base 23. The dust suction chamber of the dust cover 29 is externally connected to a dust suction drive source (not shown in the figure). When in use, the upper cleaning box 28 is lowered so that the dust cover 29 is located directly above the sliding base 23, and the dust cover 29 moves synchronously with the sliding of the sliding base 23. In this way, dust can be avoided during the grinding and rust removal process, and the construction environment is kept clean.

[0093] See also Figure 22, wherein, the first drying mechanism 41 includes two support blocks 45 arranged at intervals along the transverse extension direction, and a rotating placement unit 46 is provided on the support blocks 45. The rotating placement unit 46 includes two rotating rollers 461 arranged at intervals along the longitudinal extension direction. The axial directions of the two rotating rollers 461 are parallel and correspond to the transverse extension direction. The two rotating rollers 461 are rotatably connected to the support blocks 45. The two rotating rollers 461 are arranged adjacent to each other and the upper parts thereof are exposed above the upper surface of the support blocks 45 to jointly support one end of the steel pipe 100 through the two rotating rollers 461. A third rotation driving source 462 for drivingly connecting the rotating rollers 461 is fixedly connected to the support blocks 45; the third rotation driving source 462 is single or two in one-to-one correspondence.

[0094] In the transverse extension direction, the two rotating rollers 461 are correspondingly located between adjacent dye adsorption blocks 37 on the first painting box assembly 31; during use, after the first painting of the steel pipe 100 is completed and the steel pipe 100 is transferred to be air-dried on the two support blocks 45, one place of the steel pipe 100 is jointly supported by the two rotating rollers 461 on the support blocks 45, specifically supported at an uncoated position between two adjacent painted sections of the steel pipe 100. For more stable support, the two rotating placement units 46 are respectively correspondingly close to both ends of the first painting box assembly 31, so that the two rotating rollers 461 are preferably supported at an uncoated position close to the end of the steel pipe 100. During the air-drying process, if the steel pipe does not rotate, the dye may accumulate at the bottom of the steel pipe due to gravity. By driving the rotating rollers 461 through the provided third rotation driving source 462, the rotating rollers 461 drive the steel pipe to rotate back through friction. In this way, the dye can be more evenly air-dried on the surface of the steel pipe.

[0095] This form is a relatively simple form of the drying mechanism, which provides support and rotation to allow the steel pipe to be air-dried naturally. The structure of the second drying mechanism 42 is similar and will not be repeated here, but the two rotating rollers 461 of the second drying mechanism 42 are correspondingly located between adjacent dye adsorption blocks 37 on the second painting box assembly 32. That is to say, the position where the second drying mechanism 42 supports the steel pipe 100 is staggered from that of the first drying mechanism 41. After the first painting of the steel pipe 100 is completed, the first drying mechanism 41 supports at an uncoated position between two adjacent painted sections of the steel pipe 100; after the second painting of the steel pipe 100 is completed, the second drying mechanism 42 supports at the painted section position of the steel pipe 100 that has been painted and air-dried for the first time.

[0096] Please refer to Figure 19, to further improve quality and efficiency, the first drying mechanism 41 further includes a drying box 47 that can be lifted and is located above the two support blocks 45. The drying box 47 extends horizontally, and the drying box 47 is provided with a heating and drying unit 471 and an air drying unit 472 facing downward. By actively increasing the temperature and blowing air, it is beneficial to shorten the curing time of the dye on the steel pipe and improve the curing and adhesion quality. During implementation, the equipment is usually assembled in the workshop. The aforementioned liftable upper cleaning box 28 and drying box 47 are lift-connected to fixed parts in the assembly environment, such as the top plate of the workshop building or a special fixed bracket, etc., as long as they do not interfere with the operation of the movable parts of the equipment.

[0097] Please continue to refer to Figures 19 - 21 , in order to facilitate the control of the production rhythm, the two support blocks 45 are respectively arranged on two belt transmission units 44 that are spaced apart along the horizontally extending direction; the belt transmission unit 44 includes two belt pulleys 441, the two belt pulleys 441 are spaced apart along the vertically extending direction, the axial directions of the two belt pulleys 441 are parallel and correspond to the horizontally extending direction; a transmission belt 442 is tensioned on the two belt pulleys 441, and one end of the support block 45 away from the rotating placement unit 46 is connected to the outer side surface of the transmission belt 442; a plurality of support blocks 45 are connected to each belt transmission unit 44, and the plurality of support blocks 45 are equally spaced at equal intervals in the length direction of the transmission belt 442. Each support block 45 is provided with the rotating placement unit 46, and at least three support blocks 45 are connected to the transmission belt 442 in a straight line segment between the two belt pulleys 441 of the belt transmission unit 44.

[0098] It can be referred to Figure 20 , in this embodiment, three support blocks 45 are connected to the transmission belt 442 in a straight line segment between the two belt pulleys 441. Because after the steel pipe is painted, the time required for the surface dye to air dry and cure is longer than that of other processes. As the two belt pulleys 441 rotate and convey, after each steel pipe 100 is painted for the first time, the first moving support frame assembly 11 places it on the support block 45 closest to the first painting box assembly 31 on the transmission belt 442 in a straight line segment between the two belt pulleys 441, while the second moving support frame assembly 12 clamps the steel pipe 100 from the support block 45 closest to the second painting box assembly 32 on the transmission belt 442 in a straight line segment between the two belt pulleys 441 each time and sends it to the second painting box assembly 32 for the second painting. In this way, the time of the steel pipe 100 on the drying mechanism is doubled, the effect is better, and the problem that the time required for the surface dye to air dry and cure is longer than that of other processes is also balanced. The processes of surface cleaning and the first painting do not need to wait and can run repeatedly normally, ensuring production efficiency.

[0099] For the convenience of manufacturing the flexible transmission belt 442, facilitating the connection of the support block 45, and minimizing the impact on the operation of the transmission belt 442, a plurality of connecting bumps 443 are provided at intervals along the length direction of the transmission belt 442 on the outer side surface of the transmission belt 442, and the support blocks 45 are connected one-to-one through the plurality of connecting bumps 443; one end of the support block 45 away from the rotating placement unit 46 is recessed to form a concave cavity and is sleeved on the connecting bump 443 through the concave cavity, and the support block 45 is connected to the connecting bump 443 by a connecting rotating shaft passing through the support block 45 and the connecting bump 443, and the axial direction of the connecting rotating shaft corresponds to the transverse extension direction. The volume of the connecting bump 443 is smaller than that of the support block 45, which is convenient for being directly formed on the outer side surface of the transmission belt 442. As the basis for connection, the influence on the deformation of the transmission belt 442 at the arc section position is also smaller. The transmission belt 442 and the belt pulley 441 adopt friction transmission or tooth-shaped mating transmission, and the specific type is not limited.

[0100] For the convenience of installation, both belt transmission units 44 are connected to the drying mechanism base 43. The drying mechanism base 43 extends transversely between the two fixed slide rails 1, and there are end vertical plates 431 at both ends. The two belt transmission units 44 are respectively located inside the two end vertical plates 431. Two parallel linkage shafts 432 are rotatably penetrated between the two end vertical plates 431. The two belt pulleys 441 corresponding to the two belt transmission units 44 in the transverse extension direction are synchronously rotationally connected to a corresponding linkage shaft 432. A second rotation driving source 433 for driving the linkage shaft 432 to rotate is fixedly connected to the end vertical plate 431, which can be a single one or two in one-to-one correspondence with the linkage shaft 432; when in use, similar to the third rotation driving source 462, if it is a single one, the other wheel / roller is a driven one; if there are two in one-to-one correspondence, the two driving sources operate synchronously and in the same direction.

[0101] During use, considering the time required for the surface dye of the steel pipe 100 to dry and solidify after coloring, the number of support blocks 45 connected to the transmission belt 442 in the straight section between the two belt pulleys 441 of the belt transmission unit 44 is not limited to three and can be appropriately increased. Under the condition of permission, the distance between adjacent support blocks 45 of the transmission belt 442 can be reduced, or by changing the distance between the two belt pulleys 441, the length of the transmission belt 442 can be increased to control and achieve the goal.

[0102] Please refer to Figure 7 and Figure 8 , the coloring device further includes a conveying mechanism 5, a detection mechanism 6, a rectifying mechanism 7, and a sorting mechanism 8;

[0103] After the second painting is completed and the second moving support frame assembly 12 transports and places the steel pipe 100 on the second drying mechanism 42, the steel pipe on the second drying mechanism 42 is transported by the belt transmission unit 44 and freely falls on the conveying mechanism 5. It is transported by the conveying mechanism 5 and moves towards the shaping mechanism 7. During the movement, the painting effect of the steel pipe is detected by the detection mechanism 6. When the steel pipe moves to the shaping mechanism 7, the mechanism action of the shaping mechanism 7 blocks the steel pipe to make it pause. The steel pipes with qualified and unqualified painting effects are classified by the sorting mechanism 8. The unqualified steel pipes are horizontally removed and sent back for rework. The qualified steel pipes are further allowed to pass through the mechanism action of the shaping mechanism 7 and continue to move forward to enter the subsequent processes.

[0104] The method for painting warning paint at intervals on the steel pipes in the embodiment is for painting at intervals with two different colors of warning paint, but is not limited to two colors at all. Based on the principles and equipment described in this method, it can be known that if three, four or even more different colors of paint need to be painted at intervals, only the corresponding painting box assemblies, drying mechanisms and moving support frame assemblies need to be added, and the length of the fixed guide rail is correspondingly lengthened. The dye adsorption blocks on different painting box assemblies adsorb different colors of dyes. According to the different painting positions on the steel pipe, the dye adsorption blocks on different painting box assemblies are arranged horizontally in a staggered manner, corresponding to the positions to be painted on the steel pipe. The support positions provided during drying by the drying mechanism are arranged in a staggered manner with the positions of the dye adsorption blocks on the supporting painting box assemblies to avoid supporting on the painted color segments just completed. The supporting moving support frame assembly is used to match the process rhythm and ensure the production efficiency.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. Method for painting warning paint at intervals on steel pipes, characterized in that: This method is implemented based on a painting device, which includes two fixed sliding rails extending longitudinally. Between the two fixed sliding rails, a first painting tank assembly and a second painting tank assembly are provided at intervals along the longitudinal extension direction. The first painting tank assembly and the second painting tank assembly respectively include painting tanks extending transversely between the two fixed sliding rails. On the painting tanks, a number of dye adsorption blocks are provided at intervals along the transverse extension direction. The upper surfaces of the dye adsorption blocks are flush and exposed above the upper surface of the painting tank. The dye adsorption blocks of the first painting tank assembly and the dye adsorption blocks of the second painting tank assembly are staggered in the transverse extension direction. A moving support frame assembly is slidably provided on the two fixed sliding rails. The moving support frame assembly includes two moving support frames symmetrically arranged one by one on the two fixed sliding rails. The moving support frame includes a longitudinal moving base slidably connected to the fixed sliding rail along the longitudinal extension direction. An elevating seat is connected to the longitudinal moving base in a lifting manner. A self-rotating chuck for clamping the steel pipe is connected to the elevating seat. The self-rotating chucks on the two moving support frames are arranged oppositely. The method includes the steps: 1) Loading. Place the steel pipe horizontally between the two moving support frames, and the two ends of the steel pipe are respectively clamped and fixed by the self-rotating chucks at the corresponding ends. 2) First painting. The moving support frame assembly moves along the fixed sliding rail to the longitudinal position corresponding to the first painting tank assembly. The elevating seat descends, the steel pipe contacts each dye adsorption block on the first painting tank assembly, and the self-rotating chuck drives the steel pipe to rotate at least one week to complete the first intermittent painting. The elevating seat rises to lift the steel pipe. 3) Second painting. The moving support frame assembly moves to the longitudinal position corresponding to the second painting tank assembly. The elevating seat descends, the steel pipe contacts each dye adsorption block on the second painting tank assembly, and the self-rotating chuck drives the steel pipe to rotate at least one week to complete the second intermittent painting.

2. The method for painting warning paint at intervals on steel pipes according to claim 1, wherein: A transverse moving upper seat is slidably connected to the elevating seat along the transverse extension direction, and the self-rotating chuck is connected through the transverse moving upper seat.

3. The painting method of the warning paint for the steel pipe intervals according to claim 1, characterized in that: The upper surface of the painting tank is recessed and provided with a number of accommodating grooves for placing the dye adsorption blocks. The dye adsorption blocks are placed one by one in the accommodating grooves. An accumulation pool is also opened in the painting tank along the transverse extension direction. The accumulation pool communicates with each accommodating groove at the bottom end of each accommodating groove.

4. The method for painting warning paint at intervals on steel pipes according to claim 3, characterized in that: A liquid level indicator exposed outside the side wall of the painting tank is communicated with the side wall of the accumulation pool. A painting dye supply tank is also connected to the side wall of the painting tank. The painting dye supply tank is communicated with the accumulation pool through a supply pump. The suction end of the supply pump is communicated with the painting dye supply tank, and the pump outlet end of the supply pump is communicated with the accumulation pool.

5. The method for painting warning paint at intervals on steel pipes according to claim 2, characterized in that: In the direction of the longitudinal extension of the fixed slide rails, a surface cleaning mechanism located between the two fixed slide rails is provided in front of the first painting box assembly; a first drying mechanism located between the two fixed slide rails is provided between the first painting box assembly and the second painting box assembly; a second drying mechanism located between the two fixed slide rails is provided behind the second painting box assembly; the number of the moving support frame assemblies is two and they are arranged at intervals in the direction of the longitudinal extension of the fixed slide rails, namely the first moving support frame assembly and the second moving support frame assembly. The first moving support frame assembly is used to transport the steel pipe between the surface cleaning mechanism, the first painting box assembly and the first drying mechanism; the second moving support frame assembly is used to transport the steel pipe between the first drying mechanism, the second painting box assembly and the second drying mechanism. Step 1) is carried out by the first moving support frame assembly. After step 1) and before step 2), the first moving support frame assembly first moves the steel pipe to the surface cleaning mechanism to clean the outer circumferential surface of the steel pipe to be painted; then step 2) is entered. After step 2) and before step 3), the first moving support frame assembly transports and places the steel pipe on the first drying mechanism, releases the steel pipe and leaves the first drying mechanism; then the second moving support frame assembly clamps the steel pipe on the first drying mechanism and enters step 3); after step 3) is completed, the second moving support frame assembly transports and places the steel pipe on the second drying mechanism.

6. The method for painting warning paint at intervals on steel pipes according to claim 5, wherein: The surface cleaning mechanism includes a lower cleaning box with an open upper end. The lower cleaning box extends horizontally between the two fixed slide rails. A cleaning main body is slidably arranged in the lower cleaning box along its extending direction. The cleaning main body includes a sliding base frame. Two fixed rollers and an adjusting roller arranged in a triangular shape are rotatably connected to the sliding base frame. The axial directions of the adjusting roller and the two fixed rollers are parallel and correspond to the horizontal extending direction of the lower cleaning box. A flexible grinding belt is sleeved on the adjusting roller and the two fixed rollers. The surface of the flexible grinding belt away from the adjusting roller between the two fixed rollers forms a steel pipe grinding contact surface, and the steel pipe grinding contact surface is exposed on the upper surface of the lower cleaning box; any one of the fixed rollers or the adjusting roller is connected with a rotation driving source; the adjusting roller is slidably connected to the sliding base frame so that the vertical distance from it to the connection line of the two fixed rollers is adjustable.

7. The method for painting warning paint at intervals on steel pipes according to claim 6, characterized in that: An inner rotating frame is arranged on the sliding base frame and the adjusting roller and the two fixed rollers are connected through the inner rotating frame. The inner rotating frame is in the shape of a superior arc ring, its axial direction corresponds to the horizontal extending direction of the lower cleaning box, its open end is for the passing of the steel pipe. A coaxial ring-shaped assembly groove is opened in the middle of the inner wall of the inner rotating frame. The two ends of the fixed roller are respectively rotatably connected to the two side walls of the ring-shaped assembly groove. The two fixed rollers are symmetrically arranged relative to the inner rotating frame and are located on the same radial line. The middle parts of the two end faces of the inner rotating frame are respectively fixedly connected with a telescopic driving source. The telescopic working end of the telescopic driving source is vertically oriented towards the axis of the inner rotating frame. The two ends of the adjusting roller are respectively rotatably connected to the telescopic working ends of the two telescopic driving sources. The rotation driving source is arranged on any one of the telescopic working ends and is drivingly connected to the adjusting roller; the steel pipe grinding contact surface faces the open end of the inner rotating frame. The inner rotating frame is rotatably connected to the sliding base frame with its axis as the center of rotation.

8. The method for painting warning paint at intervals on steel pipes according to claim 7, wherein: The upper surface of the sliding base frame is recessed with a preferably arc-shaped relief opening adapted to the inner rotating frame. The opening end of the relief opening faces directly above the sliding base frame. The relief opening extends through the sliding base frame along the transverse extension direction. A coaxial mounting groove is provided in the middle of the inner wall of the relief opening, and the inner rotating frame is rotatably placed in the mounting groove; One or more driving motors are fixedly connected to the sliding base frame. When there are multiple driving motors, the driving motors are arranged at intervals along the circumferential direction of the inner rotating frame. The output shaft of the driving motor corresponds to the axial direction of the inner rotating frame and is operably connected to the outer wall of the inner rotating frame.

9. The painting method of warning paint for steel pipe intervals according to claim 5, characterized in that: The first drying mechanism includes two support blocks arranged at intervals along the transverse extension direction. A rotating placement unit is provided on the support block. The rotating placement unit includes two rotating rollers arranged at intervals along the longitudinal extension direction. The axial directions of the two rotating rollers are parallel and correspond to the transverse extension direction. The two rotating rollers are rotatably connected to the support block. The two rotating rollers are arranged adjacent to each other and the upper parts are exposed above the upper surface of the support block to jointly carry one end of the steel pipe through the two rotating rollers. A rotating driving source for driving and connecting the rotating rollers is fixedly connected to the support block; In the transverse extension direction, the two rotating rollers are correspondingly located between adjacent dye adsorption blocks on the first painting box assembly; The first drying mechanism further includes a drying box that can be lifted and lowered above the two support blocks. The drying box extends transversely, and a heating and drying unit and an air drying unit facing downward are provided on the drying box.

10. The method for painting warning paint at intervals on steel pipes according to claim 5, characterized in that: The painting equipment further includes a conveying mechanism, a detection mechanism, a rectifying mechanism, and a sorting mechanism; After step 3) is completed and the second moving support frame assembly transports and places the steel pipe on the second drying mechanism, the steel pipe is released and the second moving support frame assembly leaves the second drying mechanism; the steel pipe on the second drying mechanism is transported by the conveying mechanism and moves towards the rectifying mechanism. During the movement of the steel pipe towards the rectifying mechanism, the painting effect of the steel pipe is detected by the detection mechanism. When the steel pipe moves to the rectifying mechanism, it is blocked and stops moving. Through the sorting mechanism, the steel pipes with qualified and unqualified painting effects are classified.

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