Steel pipe coloring complete machine equipment

Abstract

The utility model belongs to the technical field of grinding, polishing and surface fluid coating in operation transportation, and particularly relates to steel pipe painting complete machine equipment which comprises two longitudinal fixed sliding rails, and a first painting box assembly and a second painting box assembly which are arranged between the two longitudinal fixed sliding rails in a spaced mode in the longitudinal direction. The first coloring box assembly and the second coloring box assembly respectively comprise a transverse coloring box between the two fixed sliding rails, a plurality of dye adsorption blocks are arranged on the coloring boxes at intervals in the transverse direction, and the upper surfaces of the dye adsorption blocks are flush and are exposed out of the upper surfaces of the coloring boxes; the dye adsorption blocks of the first painting box assembly and the second painting box assembly are arranged in a staggered manner 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 movable supporting frames which are arranged on the two fixed sliding rails in a one-to-one mode and symmetrically arranged so that the two ends of the steel pipe can be clamped respectively. The device can avoid the problem that coloring of interval warning paint on the outer surface of the pipe fitting is inconvenient, the process of dyeing and coating the axial interval warning paint on the outer surface of the pipe fitting is automatically completed, and quality and efficiency are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of grinding, polishing and coating fluid on the surface during operation and transportation, and specifically relates to a steel pipe coloring equipment. Background Technology

[0002] In construction, manufacturing, and road maintenance, it is often necessary to establish isolation zones to warn and prevent unauthorized personnel from approaching or entering. The fencing used to create these isolation zones typically uses tubular components such as steel or plastic pipes. To enhance visibility, warning paint is sprayed onto the outer surface of the pipes, commonly in alternating red and white or yellow and black patterns.

[0003] The painting or coating of pipe fittings is currently generally done manually, using spray guns or brushes to apply paint. This method is inefficient, and the connection between two colors is poor and uneven. Brush painting usually results in uneven thickness, severe brush marks, and an uneven surface with poor reflectivity after the paint is applied.

[0004] Existing technologies also include integrated pipe fitting rust removal and painting equipment disclosed in CN220613488U, but these can only spray single-color paint on the surface of pipe fittings and cannot meet the requirements for applying two-color interval warning paint. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a steel pipe coloring machine to avoid the inconvenience of coloring the outer surface of the pipe fittings with axial interval warning paint, and to achieve the effect of automatically completing the coloring of the outer surface of the pipe fittings with axial interval warning paint through mechanical equipment, thereby improving quality and efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] The steel pipe coloring machine includes two longitudinally extending fixed slide rails, and a first coloring box assembly and a second coloring box assembly spaced apart along their longitudinal extension direction are provided between the two fixed slide rails.

[0008] The first and second coloring box assemblies each include a coloring box extending laterally between two fixed slide rails. The coloring box is provided with a number of dye adsorption blocks spaced apart along its lateral extension direction. The upper surface of each dye adsorption block is flush with and exposed on the upper surface of the coloring box.

[0009] The dye adsorption blocks of the first coloring box assembly and the dye adsorption blocks of the second coloring box assembly are staggered in the lateral extension direction.

[0010] A movable support frame assembly is slidably mounted on two fixed slide rails. The movable support frame assembly includes two movable support frames that are symmetrically arranged on the two fixed slide rails. Each movable support frame includes a longitudinal base that is slidably connected to the fixed slide rails along the longitudinal extension direction. A lifting seat is slidably connected to the longitudinal base. A rotating chuck for clamping steel pipes is connected to the lifting seat. The rotating chucks on the two movable support frames are arranged opposite each other so as to clamp the two ends of the steel pipe respectively.

[0011] To further improve the above technical solution, a transverse upper seat is slidably connected to the lifting seat along the transverse extension direction, and the self-rotating chuck is connected through the transverse upper seat.

[0012] Furthermore, the upper surface of the coloring box is recessed with several receiving slots for placing dye adsorption blocks. The dye adsorption blocks are placed one-to-one in the receiving slots. A liquid accumulation pool is also provided in the coloring box along its lateral extension direction. The liquid accumulation pool is connected to the bottom of each receiving slot.

[0013] Furthermore, a liquid level indicator exposed on the side wall of the coloring tank is connected to the side wall of the slurry pool; a coloring dye supply tank is also connected to the side wall of the coloring tank, and the coloring dye supply tank is connected to the slurry pool through a supply pump. The suction end of the supply pump is connected to the coloring dye supply tank, and the pump outlet end of the supply pump is connected to the slurry pool.

[0014] Furthermore, in the direction of the longitudinal extension of the fixed slide rail,

[0015] A surface cleaning mechanism is located between two fixed slide rails at the front of the first coloring box assembly;

[0016] A first drying mechanism is provided between the first coloring box assembly and the second coloring box assembly, located between two fixed slide rails.

[0017] A second drying mechanism is located at the rear of the second coloring box assembly, between two fixed slide rails;

[0018] The number of the movable support frame assemblies is two sets, which are spaced apart in the longitudinal extension direction of the fixed slide rail. They are the first movable support frame assembly and the second movable support frame assembly. The first movable support frame assembly is used to move the steel pipe between the surface cleaning mechanism, the first coloring box assembly and the first drying mechanism. The second movable support frame assembly is used to move the steel pipe between the first drying mechanism, the second coloring box assembly and the second drying mechanism.

[0019] Furthermore, the surface cleaning mechanism includes a lower cleaning box with an open upper end, which extends laterally between two fixed slide rails. A cleaning body is slidably disposed inside the lower cleaning box along its extension direction. The cleaning body includes a sliding base frame, on which two fixed rollers and an adjusting roller are rotatably connected in a triangular arrangement. The axial directions of the adjusting roller and the two fixed rollers are parallel and correspond to the lateral extension direction of the lower cleaning box. A flexible abrasive belt is sleeved on the adjusting roller and the two fixed rollers. The side of the flexible abrasive belt away from the adjusting roller between the two fixed rollers forms a steel pipe abrasive contact surface, which is exposed on the upper surface of the lower cleaning box. Any fixed roller or adjusting roller is connected to a rotation drive source. The adjusting roller is slidably connected to the sliding base frame so that its vertical distance to the line connecting the two fixed rollers is adjustable.

[0020] Furthermore, the sliding base frame is provided with an inner rotating frame, and the adjusting roller and two fixed rollers are connected through the inner rotating frame;

[0021] The inner rotating frame is an arc-shaped ring, with its axial direction corresponding to the lateral extension direction of the lower cleaning box. Its open end is used for the passage of steel pipes. A coaxial annular 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 annular assembly groove. The two fixed rollers are symmetrically arranged relative to the inner rotating frame and located on the same radial line. Telescopic drive sources are fixedly connected to the middle of the two end faces of the inner rotating frame. The telescopic working end of the telescopic drive source is perpendicular to 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 drive sources. The rotating drive source is located on any telescopic working end and drives the connecting adjusting roller. The grinding contact surface of the steel pipe faces the open end of the inner rotating frame.

[0022] The inner rotating frame is rotatably connected to the sliding base frame with its axis as the center of rotation.

[0023] Furthermore, the upper surface of the sliding base is recessed with a superior arc-shaped clearance opening that matches the inner rotating frame. The opening end of the clearance opening faces directly upwards from the sliding base, and the clearance opening extends through the sliding base along the lateral extension direction. A coaxial mounting groove is formed in the middle of the inner wall of the clearance opening, and the inner rotating frame is rotatably placed in the mounting groove.

[0024] One or more drive motors are fixedly connected to the sliding base frame. When there are multiple drive motors, each drive motor is arranged at intervals along the circumference of the inner rotating frame. The output shaft of the drive motor corresponds to the axial direction of the inner rotating frame and is kinetically connected to the outer wall of the inner rotating frame.

[0025] Furthermore, the first drying mechanism includes two support blocks spaced apart along the lateral extension direction. The support blocks are provided with a rotating placement unit. The rotating placement unit includes two rotating rollers spaced apart along the longitudinal extension direction. The axes of the two rotating rollers are parallel and correspond to the lateral extension direction. The two rotating rollers are rotatably connected to the support blocks. The two rotating rollers are arranged adjacent to each other and their upper parts are exposed on the upper surface of the support blocks so that one end of the steel pipe can be supported by the two rotating rollers. A rotation drive source for driving the rotating rollers is fixedly connected to the support blocks.

[0026] In the lateral extension direction, the two rotating rollers are located between adjacent dye adsorption blocks on the first coloring box assembly;

[0027] The first drying mechanism also includes a drying box that can be lifted and lowered above the two support blocks. The drying box extends laterally and is equipped with a heating drying unit and an air drying unit facing downwards.

[0028] Furthermore, the two support blocks are respectively disposed on two belt drive units spaced apart along the lateral extension direction; the belt drive unit includes two belt drive pulleys, which are spaced apart along the longitudinal extension direction, and the axial directions of the two belt drive pulleys are parallel and correspond to the lateral extension direction; a drive belt is tensioned on the two belt drive pulleys, and one end of the support block away from the rotating placement unit is connected to the outer surface of the drive belt.

[0029] Each belt drive unit is connected to multiple support blocks, and the multiple support blocks are spaced apart along the length of the drive belt. At least three support blocks are connected to the straight section of the drive belt between the two belt drive pulleys of the belt drive unit.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The steel pipe coloring machine of this utility model can avoid the problem of inconvenience in coloring the outer surface of pipe fittings with axial interval warning paint, and achieve the effect of automatically completing the axial interval warning paint coating on the outer surface of pipe fittings through mechanical equipment, thus improving quality and efficiency.

[0032] 2. The steel pipe coloring machine of this utility model can automatically replenish materials, clean the surface of steel pipes, and dry them. It has high integration and high degree of automation. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the steel pipe coloring machine (with steel pipe) according to a specific embodiment;

[0034] Figure 2 A perspective view of the steel pipe coloring machine (without steel pipe clamping) of a specific embodiment;

[0035] Figure 3 for Figure 2 Top view of the equipment in the middle;

[0036] Figure 4 for Figure 3 Sectional view of AA;

[0037] Figure 5 for Figure 2 Side view of the device in the middle;

[0038] Figure 6 for Figure 5 BB section view;

[0039] Figure 7 for Figure 2 A schematic diagram of the device structure after functional integration;

[0040] Figure 8 for Figure 7 Side view of the device in the middle;

[0041] Figure 9 for Figure 7 A three-dimensional view of the mid-surface cleaning mechanism from another perspective;

[0042] Figure 10 This is a schematic diagram of the cleaning unit in a surface cleaning mechanism.

[0043] Figure 11 for Figure 10 A three-dimensional view of the main cleaning unit from another perspective;

[0044] Figure 12 for Figure 11 A separate schematic diagram of the sliding base frame of the central cleaning unit;

[0045] Figure 13 for Figure 10 A separate schematic diagram of the inner rotating frame of the central cleaning unit;

[0046] Figure 14 for Figure 13 Front view of the inner rotating frame;

[0047] Figure 15 for Figure 14 A schematic diagram showing a steel pipe placed on an inner rotating frame in preparation for rotation and grinding;

[0048] Figure 16 for Figure 15 A schematic diagram of the inner rotating frame in its first rotational state;

[0049] Figure 17 for Figure 15 A schematic diagram of the second rotation state of the inner rotating frame;

[0050] Figure 18 for Figure 15 A schematic diagram of the inner rotating frame in rotation state three;

[0051] Figure 19 for Figure 7 A three-dimensional view of the drying mechanism;

[0052] Figure 20 This is a schematic diagram of the belt drive unit (with steel pipe) in the drying mechanism;

[0053] Figure 21 This is a partial 3D view of the belt drive unit in the drying mechanism;

[0054] Figure 22 This is a separate schematic diagram of the support block and the rotating placement unit in the drying mechanism;

[0055] Among them, the fixed slide rail 1 and the steel pipe 100 are...

[0056] First movable support frame assembly 11, second movable support frame assembly 12, movable support frame 13, longitudinal base 14, lifting seat 15, transverse upper seat 16, self-rotating chuck 17.

[0057] Surface cleaning mechanism 20, lower cleaning box 21, guide column 211, drive screw 212, semi-circular notch 213, cleaning body 22, sliding base frame 23, clearance opening 231, mounting groove 232, internal threaded hole 233, guide hole 234, drive motor 235, inner rotating frame 24, annular assembly groove 241, telescopic drive source 242, fixed roller 25, adjusting roller 26, first rotation drive source 261, flexible polishing belt 27, steel pipe polishing contact surface 271, upper cleaning box 28, dust removal hood 29.

[0058] First coloring tank assembly 31, second coloring tank assembly 32, coloring tank 33, receiving tank 331, liquid accumulation tank 332, clearance arc groove 333, liquid level indicator 34, coloring dye supply tank 35, supply pump 36, dye adsorption block 37, coloring arc groove 371.

[0059] First drying mechanism 41, second drying mechanism 42, drying mechanism base 43, end plate 431, linkage shaft 432, second rotation drive source 433, belt drive unit 44, belt drive wheel 441, drive belt 442, connecting protrusion 443, support block 45, rotation placement unit 46, rotating roller 461, third rotation drive source 462, drying box 47, heating and drying unit 471, air drying unit 472. Detailed Implementation

[0060] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0061] Please see Figures 1-3The steel pipe coloring machine of a specific embodiment includes two longitudinally extending fixed slide rails 1. A first coloring box assembly 31 and a second coloring box assembly 32, spaced apart along their longitudinal extension direction, are provided between the two fixed slide rails 1. The first coloring box assembly 31 and the second coloring box assembly 32 each include a coloring box 33 extending laterally between the two fixed slide rails 1. The coloring box 33 is provided with a plurality of dye adsorption blocks 37 spaced apart along its lateral extension direction. The upper surface of each dye adsorption block 37 is flush with and exposed on the upper surface of the coloring box 33. The dye adsorption blocks 37 of the first coloring box assembly 31 and the second coloring box assembly 32... The dye adsorption blocks 37 are staggered in the transverse extension direction; a movable support frame assembly is slidably mounted on two fixed slide rails 1. The movable support frame assembly includes two movable support frames 13 symmetrically arranged on the two fixed slide rails 1, one in each. Each movable support frame 13 includes a longitudinal base 14 slidably connected to the fixed slide rail 1 along the longitudinal extension direction. A lifting seat 15 is liftably connected to the longitudinal base 14. A rotating chuck 17 for clamping the steel pipe 100 is connected to the lifting seat 15. The rotating chucks 17 on the two movable support frames 13 are arranged opposite each other to clamp the two ends of the steel pipe 100 respectively. The first coloring box assembly 31 and the second coloring box 33 are located between the two movable support frames 13 of the movable support frame assembly.

[0062] When using the steel pipe coloring equipment described in this embodiment, the following steps can be followed:

[0063] 1) Clamping and loading;

[0064] The two movable support frames 13 of the movable support frame assembly operate synchronously. They first move to the front position of the first color box assembly 31 and place the steel pipe 100 horizontally between the two movable support frames 13. The two ends of the steel pipe 100 are respectively clamped and fixed by the corresponding rotating chucks 17.

[0065] 2) First coloring;

[0066] The movable support frame assembly slides longitudinally along the fixed slide rail 1, carried by the two longitudinal sliding bases 14, until it moves to a position corresponding longitudinally to the first paint box assembly 31. The first paint box assembly 31 is located between the two movable support frames 13 of the movable support frame assembly, and the steel pipe 100 held by the rotating chucks 17 on the two movable support frames 13 is located above the first paint box assembly 31. The two rotating chucks 17 synchronously drive the steel pipe 100 to rotate continuously around its own axis as the center of rotation, and the two lifting seats 15 synchronously descend, lowering 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 to contact the dye adsorption blocks 37 on the first paint box assembly 31. The dye adsorption blocks 37 adsorb the dye of "designated color one", and after contacting the steel pipe 100, they can apply the dye to the contact surface with the steel pipe 100. Because the upper surfaces of each dye adsorption block 37 are flush and exposed on the upper surface of the coating box 33, the steel pipe 100 can be lowered to press down on each dye adsorption block 37 and cause each dye adsorption block 37 to undergo a certain elastic deformation. The dye adsorption blocks 37 that have undergone a certain elastic deformation can more effectively transfer and coat the dye onto the contact surface with the steel pipe 100. As the steel pipe 100 continues to rotate, each dye adsorption block 37 coats the adsorbed dye onto the outer circumference of the steel pipe 100 in a corresponding circle. After the steel pipe 100 presses down on each dye adsorption block 37 and continues to rotate for a certain period of time, the first interval coating is completed.

[0067] 3) Second coloring;

[0068] After the first interval coloring is completed, the two lifting seats 15 rise synchronously until the steel pipe 100 leaves the dye adsorption blocks 37 and returns to above the first coloring box assembly 31. The movable support frame assembly continues to slide longitudinally along the fixed slide rail 1, along with the two longitudinal sliding bases 14, moving to a position corresponding longitudinally to the second coloring box assembly 32. The second coloring box assembly 32 is located between the two movable support frames 13 of the movable support frame assembly, and the steel pipe 100 is located above the second coloring box assembly 32. The two lifting seats 15 descend synchronously, lowering the height of the steel pipe 100, causing the steel pipe 100 to press down, and the outer circumference of the steel pipe 100 contacts the dye adsorption blocks 37 on the second coloring box assembly 32. The dye adsorption blocks 37 on the second coloring box assembly 32 adsorb the dye of "designated color two". After the steel pipe 100 presses down on the dye adsorption blocks 37 and continues to rotate for a certain period of time, the second interval coloring is completed.

[0069] 4) Feeding;

[0070] After the second interval coating is completed, the two lifting seats 15 rise synchronously until the steel pipe 100 leaves each dye adsorption block 37 and returns to above the second coating box assembly 32. The two rotating chucks 17 stop rotating synchronously. The movable support frame assembly continues to slide longitudinally along the fixed slide rail 1, along with the two longitudinal sliding bases 14, moving to a position behind the second coating box assembly 32. The two rotating chucks 17 release their clamping and fixing of the steel pipe 100. The steel pipe 100 is then removed.

[0071] The dye colors of "Specified Color One" and "Specified Color Two" mentioned above are different. For example, "Specified Color One" is yellow and "Specified Color Two" is black, or "Specified Color One" is white and "Specified Color Two" is red. Furthermore, because the dye adsorption blocks 37 of the first coloring box assembly 31 and the dye adsorption blocks 37 of the second coloring box assembly 32 are staggered in the lateral extension direction, please refer to... Figure 3 After the first and second coloring processes are completed, a warning paint effect with different colors and axial intervals is formed on the outer circumference of the steel pipe 100. The coloring process is completed automatically, with uniform coloring and neat edges. Manual labor is only required to load and unload materials and add dye to the dye adsorption block 37 at fixed times or in fixed amounts, thus improving quality and efficiency.

[0072] During implementation, the axial length of different color segments and the length by which each segment overlaps the ends of the adjacent segments in the first coating during the second coating are assigned to the length and spacing of each dye adsorption block 37 on the coating box according to the actual process requirements. The dye adsorption block 37 is made of materials such as sponge or foam, which have adsorption capacity, can meet the requirements of elastic deformation under pressure, and can apply the adsorbed dye to the contact object. The self-rotating chuck 17 is similar to the chuck of a CNC lathe. Commonly, the chuck has three jaws that can move apart or closer together radially. It can be closed from the outside to clamp the outer wall of the steel pipe, or opened from the inside to fix it to the inner hole of the steel pipe. The chuck is rotatably connected in the chuck seat and can rotate under the drive of the chuck seat's own motor. Since it is an existing part, it will not be described in detail.

[0073] To facilitate loading and unloading, a transverse upper seat 16 is slidably connected to the lifting seat 15 along the lateral extension direction, and the rotating chuck 17 is connected through the transverse upper seat 16. This avoids the problem of requiring long jaws or having to open the jaws as much as possible during installation and disassembly to load and unload steel pipes. To ensure that the outer circumference of the steel pipe 100, including both ends, can be fully painted, the rotating chuck 17 preferably has three jaws that are radially spaced apart and internally fixed to the inner hole of the steel pipe. During installation, the rotating chuck 17 is connected to the transverse upper seat 16, with the jaws facing away from each other to allow space. After the steel pipe is placed horizontally (one end can be overlapped first), the jaws are brought together to a set distance, and the two ends of the steel pipe are overlapped on the rotating chuck 17. The jaws are then opened to fix the steel pipe. When releasing, the jaws slightly retract inward, and then, with the help of the transverse upper seat 16, the jaws move away from each other, allowing the steel pipe 100 to be removed.

[0074] In practice, the longitudinal base 14, the lifting seat 15, and the transverse upper seat 16 each have corresponding sliding fit structures and drive mechanisms. With the rotation of the self-rotating chuck 17, it is equivalent to satisfying the XYZ three-axis movement and Z-axis rotation of common automated equipment, for a total of four degrees of freedom. The specific structure and drive control are existing technologies and will not be described in detail here.

[0075] Please see Figures 4-6 The upper surface of the coloring box 33 is recessed with several receiving grooves 331 for placing dye adsorption blocks 37. The dye adsorption blocks 37 are placed one-to-one in the receiving grooves 331. The coloring box 33 is also provided with a liquid accumulation pool 332 along its lateral extension direction. The liquid accumulation pool 332 is connected to the bottom of each receiving groove 331.

[0076] This facilitates the placement and fixation of the dye adsorption block 37, and the liquid accumulation tank 332 can increase the amount of dye stored each time. After a certain period of use and quantity, as long as the amount of dye stored in the liquid accumulation tank 332 is sufficient, the amount of dye adsorbed on the dye adsorption block 37 can always be maintained, thereby ensuring the dyeing effect on the steel pipe, reducing the frequency of manual inspection and dye addition, and further freeing up manpower.

[0077] The liquid level indicator 34 is connected to the side wall of the liquid accumulation tank 332 and exposed to the side wall of the coloring tank 33; the side wall of the coloring tank 33 is also connected to the coloring dye supply tank 35, which is connected to the liquid accumulation tank 332 through the supply pump 36. The suction end of the supply pump 36 is connected to the coloring dye supply tank 35, and the pump outlet end of the supply pump 36 is connected to the liquid accumulation tank 332.

[0078] This makes it easy to observe whether the dye is sufficient; adding dye to the accumulation tank 332 via the dye replenishment tank 35 and the replenishment pump 36 makes operation more convenient. Furthermore, by switching to a level display 34 with level detection and signal connection to the controller, the controller can then control the replenishment pump 36, which can automatically start replenishing dye when the dye in the accumulation tank 332 is insufficient.

[0079] Specifically, in the longitudinal extension direction, the width of the liquid accumulation pool 332 is smaller than the width of the receiving tank 331, and their width centers coincide, so that the dye adsorption block 37 is stably placed on both sides of the bottom wall of the receiving tank 331; the upper surface of the coloring box 33 is also provided with a clearance arc groove 333 extending through it in the transverse extension direction, and the upper surface of the dye adsorption block 37 is provided with a coloring arc groove 371 extending through it in the transverse extension direction, the depth of the coloring arc groove 371 being less than that of the clearance arc groove 333. During coloring, the steel pipe 100 presses down to contact the arc-shaped coloring arc groove 371, which is beneficial for dyeing.

[0080] A single level indicator 34 can be used to display the overall dye level of the accumulation tank 332 and each connected container tank 331. Utilizing the principle of equal water pressure and liquid level, the level indicator 34 can be a transparent tube with its lower end horizontally bent and connected to the side wall of the accumulation tank 332, and the other end exposed in the coloring box 33 and extending vertically upward to a certain height while remaining unobstructed. In this embodiment, the liquid level indicator 34 is set one-to-one with the receiving tank 331. The lower end is horizontally bent and connected to the side wall of the liquid accumulation pool 332 below the corresponding receiving tank 331. The other end is exposed in the coloring box 33 and extends vertically upward to a certain height. The upper end is horizontally bent and connected to the upper part of the side wall of the corresponding receiving tank 331. The dye adsorption block 37 is made of loose and breathable material, which will not cause the upper end of the liquid level indicator 34 to be blocked, ensuring the normal operation of the liquid level indicator 34. The exposed part is easy to clean. When the dye flow in the liquid accumulation pool 332 is not smooth, the amount of dye at each position of the receiving tank 331 can be observed, avoiding insufficient dye in some parts of the steel pipe leading to insufficient coloring effect in some sections of the pipe.

[0081] The above describes the basic components and structure of the steel pipe coloring machine as an example. By controlling the operation according to the steps described, the function of intermittent coloring of steel pipes can be realized.

[0082] To further improve equipment output efficiency and quality, the basic design will continue to be integrated and improved. Please see below. Figure 7 , Figure 8 In the direction of the longitudinal extension of the fixed slide rail 1,

[0083] A surface cleaning mechanism 20 is located between two fixed slide rails 1 at the front of the first coloring box assembly 31;

[0084] A first drying mechanism 41 is provided between the first coloring box assembly 31 and the second coloring box assembly 32, located between two fixed slide rails 1;

[0085] A second drying mechanism 42 is located between two fixed slide rails 1 at the rear of the second coloring box assembly 32.

[0086] The number of the movable support frame assemblies is two sets, which are spaced apart in the longitudinal extension direction of the fixed slide rail 1. They are the first movable support frame assembly 11 and the second movable support frame assembly 12. The first movable support frame assembly 11 is used to move the steel pipe between the surface cleaning mechanism 20, the first coloring box assembly 31 and the first drying mechanism 41. The second movable support frame assembly 12 is used to move the steel pipe between the first drying mechanism 41, the second coloring box assembly 32 and the second drying mechanism 42.

[0087] This facilitates improved efficiency and quality. Before the first coat of paint, after the steel pipe 100 is clamped and loaded onto the first movable support assembly 11, it is moved to the surface cleaning mechanism 20 to clean the outer circumference of the steel pipe 100 to be painted, such as by wiping, removing rust, or polishing. The steel pipe 100 can rotate with the self-rotating chuck 17 on the first movable support assembly 11, which also facilitates the surface cleaning process. Surface cleaning can be done manually or through simple automated mechanical operation; the specific method is not limited. For example, a robotic arm can be used to place a wiping cotton pad against the steel pipe 100, and the robotic arm can move laterally. With the rotation of the steel pipe 100, the entire outer circumference of the steel pipe 100 can be cleaned.

[0088] After surface cleaning, the first movable support frame assembly 11 transports the steel pipe 100 to the first coloring box assembly 31 to complete the first coloring.

[0089] After the first coating is completed, the first movable support frame assembly 11 moves the steel pipe 100 to the first drying mechanism 41 and places it on the first drying mechanism 41. Specifically, the two rotating chucks 17 stop rotating, the two lifting seats 15 lower to place the steel pipe on the first drying mechanism 41, the two rotating chucks 17 release the fixation on the ends of the steel pipe, and the two transverse upper seats 16 move away from each other, detaching the steel pipe. Then, the first movable support frame assembly 11 returns, leaves the first drying mechanism 41, and performs the clamping and loading of the next steel pipe, repeating the aforementioned process, moving back and forth between the surface cleaning mechanism 20, the first coating box assembly 31, and the first drying mechanism 41.

[0090] After the first coloring is completed, the steel pipe can be naturally air-dried by simply being supported on the first drying mechanism 41, or an efficiency-enhancing mechanism such as heating drying or air blowing drying can be added, whichever is more specific.

[0091] After the dye applied in the first coat dries to a suitable degree on the steel pipe 100, the second movable support assembly 12 moves longitudinally to the corresponding position of the first drying mechanism 41, clamping the steel pipe. Specifically, the two lifting seats 15 lower, making the two rotating chucks 17 at the same height and corresponding to both ends of the steel pipe; the transverse upper seat 16 moves closer to each other; the jaws of the two rotating chucks 17 extend into the inner end of the steel pipe; the jaws of the two rotating chucks 17 spread open and fix the steel pipe; the two lifting seats 15 rise, placing the steel pipe 100 above the first drying mechanism 41. Then, it is sent to the second coating box assembly 32 for the second coating.

[0092] After the second coating is completed, the second movable support frame assembly 12 moves the steel pipe 100 to the second drying mechanism 42 and places it on the second drying mechanism 42, then detaches the steel pipe. Then, the second movable support frame assembly 12 returns and reciprocates between the first drying mechanism 41, the second coating box assembly 32, and the second drying mechanism 42.

[0093] After the dye applied for the second time has dried to a suitable degree on the steel pipe 100, it can be removed manually or by other mechanical equipment.

[0094] This approach, by subdividing the steps and processes for completing the two-stage coloring of the steel pipes, allows for easier control of the cycle time, improved efficiency and quality, and enhanced equipment functionality. During implementation, the number of movable support assemblies 12 is not limited to two; they can be rationally matched to the actual duration of each process for efficient utilization.

[0095] Please see 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 laterally between two fixed slide rails 1. A cleaning body 22 is slidably disposed inside the lower cleaning box 21 along its extension direction. The cleaning body 22 includes a sliding base 23. 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 lateral extension direction of the lower cleaning box 21. A flexible abrasive belt 27 is sleeved on the adjusting roller. On rollers 26 and 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, which is exposed on the upper surface of the lower cleaning box 21; any fixed roller 25 or adjusting roller 26 is connected to a first rotation drive source 261; the adjusting roller 26 is slidably connected to the sliding base 23 so that its vertical distance to the line connecting the shaft cores of the two fixed rollers 25 is adjustable, which can ensure that the flexible grinding belt 27 can be appropriately moved and maintain tension when grinding the steel pipe.

[0096] In conjunction 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 23 is still exposed on the upper surface of the lower cleaning box 21. During use, the first movable support frame assembly 11 slides longitudinally along the fixed slide rail 1, along with the two longitudinal sliding bases 14, moving 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, lowering the height of the steel pipe 100, causing the steel pipe 100 to press down, so that 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 moderately pressed down. (See [reference needed]). Figure 14 and Figure 15 During the downward pressing process, the adjusting roller 26 slides towards the steel pipe 100, appropriately loosening the flexible grinding belt 27 to allow the steel pipe to press down while maintaining tension. The first rotation drive source 261 drives the flexible grinding belt 27 to rotate, grinding and removing rust from the steel pipe. In conjunction with the rotation of the steel pipe and the reciprocating sliding of the cleaning body 22 along the axial direction of the steel pipe, grinding and removing rust from the entire outer circumference of the steel pipe 100 can be completed.

[0097] The sliding base frame 23 is equipped with an inner rotating frame 24, which connects the adjusting roller 26 and two fixed rollers 25. The inner rotating frame 24 is annular in shape with a superior arc, and its axial direction corresponds to the lateral extension direction of the lower cleaning box 21. Its open end is used for the passage of steel pipes. A coaxial annular assembly groove 241 is opened in the middle of the inner wall of the inner rotating frame 24. The two ends of the fixed rollers 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 located on the same radial line. The inner rotating frame 24 has telescopic drive sources 242 fixedly connected to the middle of the circumferential direction on both ends of its two ends. The telescopic working ends of the telescopic drive sources 242 are perpendicular to the axis of the inner rotating frame 24. The two ends of the adjusting roller 26 are rotatably connected to the telescopic working ends of the two telescopic drive sources 242 respectively. The first rotating drive source 261 is located on any telescopic working end and drives the adjusting roller 26. The steel pipe grinding contact surface 271 faces the opening 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 center of rotation.

[0098] Thus, a rotatable inner rotating frame 24 is added to the sliding base frame 23 as an intermediate transition connecting the rollers, and the flexible grinding belt 27 is tensioned on the inner rotating frame 24. In use, after the steel pipe is pressed down, it is positioned between the two fixed rollers 25, at the center of the inner rotating frame 24, as shown in the diagram. Figures 14-16 The inner rotating frame 24 can reciprocate or rotate in a directional manner under a driving force, improving the grinding and rust removal effect on the steel pipe. The opening end of the inner rotating frame 24 for the steel pipe to pass through can be as small as possible. Only one driving source is needed to make the inner rotating frame 24 reciprocate or rotate in a directional manner, thus eliminating the need for the steel pipe to rotate itself, improving the applicability of the surface cleaning mechanism 20, and allowing it to be used even in situations where the steel pipe cannot rotate. The specific structural form of the sliding base frame 23 is not limited; it can be a frame form, a box form, etc., as long as it can provide a basic connection.

[0099] In this embodiment, the upper surface of the sliding base 23 is recessed with a relief opening 231 in an arc shape that is adapted to the inner rotating frame 24. The axial direction of the relief opening 231 corresponds to the lateral extension direction of the lower cleaning box 21. The opening end of the relief opening 231 faces directly above the sliding base 23. The relief opening 231 extends through the sliding base 23 along the lateral extension direction. A coaxial mounting groove 232 is provided in the middle of the inner wall of the relief opening 231. The inner rotating frame 24 is rotatably placed in the mounting groove 232. The diameter of the mounting groove 232 matches the diameter of the outer wall of the inner rotating frame 24. The diameter of the relief opening 231 is smaller than the diameter of the outer wall of the inner rotating frame 24 and larger than the diameter of the inner wall of the inner rotating frame 24 so as to make way for the telescopic drive source 242 connected to the end face of the inner rotating frame 24.

[0100] The lower part of the sliding base frame 23 is provided with an internal threaded hole 233 and two symmetrical guide holes 234 extending through it along the lateral extension direction. The internal threaded hole 233 is located between the two guide holes 234. The lower cleaning box 21 is provided with a guide post 211 along the lateral extension direction and is rotatably connected to a drive screw 212. The sliding base frame 23 is slidably connected to the two guide posts 211 through the two guide holes 234. The internal threaded hole 233 of the sliding base frame 23 is threadedly connected to the drive screw 212. By rotating the drive screw 212, the sliding base frame 23 is driven to slide back and forth along the guide post 211. The end plates at both ends of the sliding base frame 23 are provided with a semi-circular notch 213 coaxial with the inner rotating frame 24. The diameter of the semi-circular notch 213 matches the diameter of the inner wall of the inner rotating frame 24.

[0101] 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 circumferentially at intervals along 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 kinetically 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 interacts with the outer wall of the inner rotating frame 24, preferably through friction transmission. See also... Figures 15-18 The process of rotary grinding of steel pipe 100 is demonstrated, during which steel pipe 100 can rotate or remain stationary. During equipment manufacturing, the sliding base frame 23 can be configured as a radially split assembly to facilitate the insertion of the inner rotating frame 24 into the clearance port 231 and to facilitate the connection of the drive motor 235 and its output shaft.

[0102] The surface cleaning mechanism 20 also includes an upper cleaning box 28 that can be raised and lowered above the lower cleaning box 21. The upper cleaning box 28 extends laterally between two fixed slide rails 1 and has an open lower end. A dust removal hood 29 is slidably disposed inside the upper cleaning box 28 along its extension direction. The dust removal hood 29 has a dust suction chamber facing the sliding base 23, and the dust suction chamber of the dust removal hood 29 is connected to a dust suction drive source (not shown in the figure). In use, the upper cleaning box 28 is lowered so that the dust removal hood 29 is directly above the sliding base 23, and the dust removal hood 29 moves synchronously with the sliding base 23. In this way, dust is avoided during the grinding and rust removal process, ensuring a clean working environment.

[0103] Please see Figure 22The first drying mechanism 41 includes two support blocks 45 spaced apart along the transverse extension direction. The support blocks 45 are provided with a rotating placement unit 46. The rotating placement unit 46 includes two rotating rollers 461 spaced apart 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 their upper parts are exposed on the upper surface of the support blocks 45 so that one end of the steel pipe 100 is supported by the two rotating rollers 461. A third rotation drive source 462 that drives the rotating rollers 461 is fixedly connected to the support blocks 45. The third rotation drive source 462 is a single source or two sources in a pair.

[0104] In the lateral direction, the two rotating rollers 461 are positioned between adjacent dye adsorption blocks 37 on the first coloring box assembly 31. During use, after the steel pipe 100 has been coated for the first time, when it is transferred to the two support blocks 45 for air drying, the two rotating rollers 461 on the support blocks 45 jointly support a section of the steel pipe 100, specifically between two adjacent coated sections, at the uncoated position. For more stable support, the two rotating placement units 46 are respectively positioned close to both ends of the first coloring box assembly 31, so that the two rotating rollers 461 support the uncoated position as close as possible 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. The rotating rollers 461 are driven by the third rotating drive source 462, and the rotating rollers 461 rotate the steel pipe through friction, thus allowing the dye to dry more evenly on the surface of the steel pipe.

[0105] This is a relatively simple drying mechanism that provides support and rotation, allowing the steel pipe to air dry naturally. The structure of the second drying mechanism 42 is similar and will not be described again, but the two rotating rollers 461 of the second drying mechanism 42 are located between adjacent dye adsorption blocks 37 on the second coloring box assembly 32. That is to say, the position of the second drying mechanism 42 supporting the steel pipe 100 is offset from that of the first drying mechanism 41. After the first coloring of the steel pipe 100, the first drying mechanism 41 supports the steel pipe 100 between two adjacent coloring sections, in the uncoloring position; while after the second coloring of the steel pipe 100, the second drying mechanism 42 supports the steel pipe 100 in the position of the coloring section that has been first colored and dried.

[0106] Please see Figure 19To further improve efficiency and effectiveness, the first drying mechanism 41 also includes a lifting drying box 47 located above the two support blocks 45. The drying box 47 extends laterally and is equipped with a downward-facing heating drying unit 471 and an air drying unit 472. By actively increasing the temperature and airflow, the curing time of the dye on the steel pipe is shortened, improving the curing adhesion quality. In practice, the equipment is usually assembled in a workshop. The aforementioned lifting upper cleaning box 28 and drying box 47 are lifted and connected to fixed components in the assembly environment, such as the ceiling of the workshop or a dedicated fixed bracket, without interfering with the operation of the moving parts of the equipment.

[0107] Please continue reading Figures 19-21 To facilitate production cycle control, two support blocks 45 are respectively mounted on two belt drive units 44 spaced apart along the lateral extension direction. Each belt drive unit 44 includes two belt drive pulleys 441, which are spaced apart along the longitudinal extension direction. The axes of the two belt drive pulleys 441 are parallel and correspond to the lateral extension direction. A drive belt 442 is tensioned on the two belt drive pulleys 441. One end of the support block 45 away from the rotating placement unit 46 is connected to the outer surface of the drive belt 442. Each belt drive unit 44 is connected to multiple support blocks 45, and the multiple support blocks 45 are equidistantly spaced along the length of the drive belt 442. Each support block 45 is provided with the rotating placement unit 46. At least three support blocks 45 are connected to the straight section of the drive belt 442 between the two belt drive pulleys 441 of the belt drive unit 44.

[0108] See also Figure 20 In this embodiment, three support blocks 45 are connected to the straight section of the transmission belt 442 between the two drive pulleys 441. This is because the drying and curing time of the surface dye after the steel pipe is coated is longer than other processes. As the two drive pulleys 441 rotate and transport the steel pipe 100, after the first coating, the first movable support frame assembly 11 places it on the support block 45 closest to the first coating box assembly 31 on the straight section of the transmission belt 442 between the two drive pulleys 441. The second movable support frame assembly 12 then clamps the steel pipe 100 from the support block 45 closest to the second coating box assembly 32 on the straight section of the transmission belt 442 between the two drive pulleys 441 and sends it to the second coating box assembly 32 for the second coating. This doubles the drying time of the steel pipe 100, resulting in better performance and balancing the longer drying and curing time of the surface dye compared to other processes. The surface cleaning and first coloring processes do not require waiting; they can be repeated normally, ensuring production efficiency.

[0109] To facilitate the manufacturing of the flexible transmission belt 442, facilitate the connection of the support block 45, and minimize the impact on the operation of the transmission belt 442, multiple connecting protrusions 443 are spaced apart along the length of the transmission belt 442 on its outer surface. These connecting protrusions 443 connect to the support blocks 45 one-to-one. A recessed cavity is formed at the end of the support block 45 away from the rotating placement unit 46, and this cavity fits onto the connecting protrusion 443. A connecting shaft passes through the support block 45 and the connecting protrusion 443, connecting the support block 45 to the connecting protrusion 443. The axial direction of the connecting shaft corresponds to the lateral extension direction. The connecting protrusion 443 is smaller than the support block 45, making it easier to directly form on the outer surface of the transmission belt 442, serving as the basis for connection. It also has less impact on the deformation of the transmission belt 442 at the curved section. The transmission belt 442 and the belt drive pulley 441 employ friction transmission or toothed engagement transmission, whichever is more specific.

[0110] For ease of installation, both belt drive units 44 are connected to the drying mechanism base 43. The drying mechanism base 43 extends laterally between two fixed slide rails 1, with end plates 431 at both ends. The two belt drive units 44 are respectively located on the inner sides of the end plates 431. Two parallel linkage shafts 432 are rotatably connected between the end plates 431. The two belt drive wheels 441 of the two belt drive units 44 in the lateral extension direction are synchronously connected to the corresponding linkage shaft 432. A second rotation drive source 433 for driving the linkage shaft 432 is fixedly connected to the end plate 431. It can be a single source or two sources paired with the linkage shaft 432. When driving, similar to the third rotation drive source 462, if it is a single source, the other wheel / roller is driven; if it is a pair, the two drive sources run synchronously in the same direction.

[0111] In use, considering the time required for the dye on the surface of the steel pipe 100 to air dry and cure, the number of support blocks 45 connected to the straight section of the transmission belt 442 between the two belt drive pulleys 441 of the belt drive unit 44 is not limited to three, and can be increased appropriately. Where conditions permit, the spacing between adjacent support blocks 45 of the transmission belt 442 can be reduced, or the length of the transmission belt 442 can be increased by changing the spacing between the two belt drive pulleys 441.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A complete steel pipe coloring machine, characterized in that: It includes two longitudinally extending fixed slide rails, and a first color box assembly and a second color box assembly spaced apart along their longitudinal extension direction are provided between the two fixed slide rails. The first and second coloring box assemblies each include a coloring box extending laterally between two fixed slide rails. The coloring box is provided with a number of dye adsorption blocks spaced apart along its lateral extension direction. The upper surface of each dye adsorption block is flush with and exposed on the upper surface of the coloring box. The dye adsorption blocks of the first coloring box assembly and the dye adsorption blocks of the second coloring box assembly are staggered in the lateral extension direction. A movable support frame assembly is slidably mounted on two fixed slide rails. The movable support frame assembly includes two movable support frames that are symmetrically arranged on the two fixed slide rails. Each movable support frame includes a longitudinal base that is slidably connected to the fixed slide rails along the longitudinal extension direction. A lifting seat is slidably connected to the longitudinal base. A rotating chuck for clamping steel pipes is connected to the lifting seat. The rotating chucks on the two movable support frames are arranged opposite each other so as to clamp the two ends of the steel pipe respectively.

2. The steel pipe coloring equipment according to claim 1, characterized in that: The lifting seat is slidably connected to a transverse upper seat along the lateral extension direction, and the self-rotating chuck is connected through the transverse upper seat.

3. The steel pipe coloring equipment according to claim 1, characterized in that: The upper surface of the coloring box is recessed with several receiving slots for placing dye adsorption blocks. The dye adsorption blocks are placed one-to-one in the receiving slots. A liquid accumulation pool is also provided in the coloring box along its lateral extension direction. The liquid accumulation pool is connected to the bottom of each receiving slot.

4. The steel pipe coloring equipment according to claim 3, characterized in that: The side wall of the sump is connected to a liquid level indicator exposed on the side wall of the coloring tank; the side wall of the coloring tank is also connected to a coloring dye supply tank, which is connected to the sump via a supply pump. The suction end of the supply pump is connected to the coloring dye supply tank, and the discharge end of the supply pump is connected to the sump.

5. The steel pipe coloring equipment according to claim 2, characterized in that: In the direction of the longitudinal extension of the fixed slide rail, A surface cleaning mechanism is located between two fixed slide rails at the front of the first coloring box assembly; A first drying mechanism is provided between the first coloring box assembly and the second coloring box assembly, located between two fixed slide rails. A second drying mechanism is located at the rear of the second coloring box assembly, between two fixed slide rails; The number of the movable support frame assemblies is two sets, which are spaced apart in the longitudinal extension direction of the fixed slide rail. They are the first movable support frame assembly and the second movable support frame assembly. The first movable support frame assembly is used to move the steel pipe between the surface cleaning mechanism, the first coloring box assembly and the first drying mechanism. The second movable support frame assembly is used to move the steel pipe between the first drying mechanism, the second coloring box assembly and the second drying mechanism.

6. The steel pipe coloring equipment according to claim 5, characterized in that: The surface cleaning mechanism includes a lower cleaning box with an open upper end, which extends laterally between two fixed slide rails. A cleaning body is slidably disposed inside the lower cleaning box along its extension direction. The cleaning body includes a sliding base frame, on which two fixed rollers and an adjusting roller are rotatably connected in a triangular arrangement. The axial directions of the adjusting roller and the two fixed rollers are parallel and correspond to the lateral extension direction of the lower cleaning box. A flexible abrasive belt is sleeved on the adjusting roller and the two fixed rollers. The side of the flexible abrasive belt away from the adjusting roller between the two fixed rollers forms a steel pipe abrasive contact surface, which is exposed on the upper surface of the lower cleaning box. Any fixed roller or adjusting roller is connected to a rotation drive source. The adjusting roller is slidably connected to the sliding base frame so that its vertical distance to the line connecting the two fixed rollers is adjustable.

7. The steel pipe coloring equipment according to claim 6, characterized in that: An inner rotating frame is provided on the sliding base frame, and the adjusting roller and two fixed rollers are connected through the inner rotating frame. The inner rotating frame is an arc-shaped ring, with its axial direction corresponding to the lateral extension direction of the lower cleaning box. Its open end is used for the passage of steel pipes. A coaxial annular 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 annular assembly groove. The two fixed rollers are symmetrically arranged relative to the inner rotating frame and located on the same radial line. Telescopic drive sources are fixedly connected to the middle of the two end faces of the inner rotating frame. The telescopic working end of the telescopic drive source is perpendicular to 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 drive sources. The rotating drive source is located on any telescopic working end and drives the connecting adjusting roller. The grinding contact surface of the steel pipe 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 steel pipe coloring equipment according to claim 7, characterized in that: The upper surface of the sliding base frame is recessed with an arc-shaped clearance opening that matches the inner rotating frame. The opening end of the clearance opening faces directly upwards from the sliding base frame. The clearance opening extends through the sliding base frame along the lateral extension direction. A coaxial mounting groove is formed in the middle of the inner wall of the clearance opening, and the inner rotating frame is rotatably placed in the mounting groove. One or more drive motors are fixedly connected to the sliding base frame. When there are multiple drive motors, each drive motor is arranged at intervals along the circumference of the inner rotating frame. The output shaft of the drive motor corresponds to the axial direction of the inner rotating frame and is kinetically connected to the outer wall of the inner rotating frame.

9. The steel pipe coloring equipment according to claim 5, characterized in that: The first drying mechanism includes two support blocks spaced apart along the lateral extension direction. The support blocks are provided with a rotating placement unit. The rotating placement unit includes two rotating rollers spaced apart along the longitudinal extension direction. The axes of the two rotating rollers are parallel and correspond to the lateral extension direction. The two rotating rollers are rotatably connected to the support blocks. The two rotating rollers are arranged adjacent to each other and their upper parts are exposed on the upper surface of the support blocks so that the two rotating rollers can jointly support one end of the steel pipe. A rotation drive source for driving the rotating rollers is fixedly connected to the support blocks. In the lateral extension direction, the two rotating rollers are located between adjacent dye adsorption blocks on the first coloring box assembly; The first drying mechanism also includes a drying box that can be lifted and lowered above the two support blocks. The drying box extends laterally and is equipped with a heating drying unit and an air drying unit facing downwards.

10. The steel pipe coloring equipment according to claim 9, characterized in that: Two support blocks are respectively disposed on two belt drive units spaced apart along the lateral extension direction; each belt drive unit includes two belt drive pulleys, which are spaced apart along the longitudinal extension direction, and the axial directions of the two belt drive pulleys are parallel and correspond to the lateral extension direction; a drive belt is tensioned on the two belt drive pulleys, and one end of the support block away from the rotating placement unit is connected to the outer surface of the drive belt. Each belt drive unit is connected to multiple support blocks, and the multiple support blocks are spaced apart along the length of the drive belt. At least three support blocks are connected to the straight section of the drive belt between the two belt drive pulleys of the belt drive unit.

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