Device and process for processing surface coating of seamless steel pipe

Abstract

The invention discloses a device and a process for processing a surface coating of a seamless steel pipe, and particularly relates to the technical field of seamless steel pipe processing, comprising an in-pipe sliding part, an in-pipe pressurizing part and a pressurizing fixing structure, the in-pipe sliding part comprises a pair of assembly seats arranged in the seamless steel pipe, a shaft rod rotationally connected to the pair of assembly seats and leather cups detachably connected to the assembly seats, the leather cups are connected in the seamless steel pipe in a sliding mode, and the in-pipe pressurizing part is arranged at the end of the seamless steel pipe and used for pressurizing the interior of the seamless steel pipe; the leather cup is pushed to slide in the seamless steel tube; the device for machining the surface coating of the seamless steel pipe further comprises a driving unit, a spraying frame, a tensioning structure and a polishing transmission assembly. The technical problems that current spraying equipment is limited in movable spraying and inconvenient to operate, the spraying effect is influenced, the function integration is insufficient, and the machining efficiency of seamless steel pipes is influenced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of seamless steel pipe processing, and more specifically, to a device and a process for processing surface coating of seamless steel pipe. Background Art

[0002] Compared with ordinary steel pipes, seamless steel pipes can withstand higher pressures. Therefore, in industrial production, seamless steel pipes are used when pipes need to withstand greater pressures. Some people call it "the micro-blood vessels in industry". Whether it is the manufacture of airplanes, ships, trains, or the transportation of oil, gas, and water, it is indispensable. When seamless steel pipes are used as transmission pipelines, some corrosive media will cause the inner wall of the seamless steel pipe to replicate. Therefore, when seamless steel pipes are put into use, the inner wall of the pipe needs to be sprayed with an anti-corrosion coating.

[0003] At present, when anti-corrosion coating is sprayed on seamless steel pipes, spraying equipment is mostly used inside the seamless steel pipes. The current spraying equipment mainly uses a long-rod gun head or a mobile spray rack to form a spray with an external feed. For seamless steel pipes with small diameters, long pipes or bends, the current spraying equipment has technical problems such as limited mobile spraying, inconvenient operation and impact on the spraying effect. In addition, the existing spraying equipment for seamless steel pipes has a single function, because the inner wall cleanliness of the seamless steel pipe must be ensured before spraying, that is, there is no metal residue, and the cleaning and spraying of the inner wall of the seamless steel pipe are two independent projects. The current spraying equipment cannot meet the work requirements of the above projects, and the functional integration is insufficient, while also affecting the processing efficiency of the seamless steel pipe. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for surface coating processing of seamless steel pipes, comprising an inner tube sliding part, an inner tube pressurizing part and a pressurizing fixing structure, wherein the inner tube sliding part comprises a pair of assembly seats arranged in the seamless steel pipe, a shaft rotatably connected to the pair of assembly seats and a leather cup detachably connected to each assembly seat, wherein the leather cup is slidably connected in the seamless steel pipe, the inner tube pressurizing part is arranged at the end of the seamless steel pipe, and the inner tube pressurizing part is used to pressurize the seamless steel pipe to push the leather cup to slide in the seamless steel pipe, and the pressurizing fixing structure is used to fix the pipeline pressurizing part on the seamless steel pipe;

[0006] Also includes:

[0007] A driving unit, the driving unit being arranged on one of the assembly seats, and the driving unit being used for driving the shaft to rotate;

[0008] A spraying rack, the spraying rack is arranged at one end of the shaft rod, and the spraying rack is located on one side of another assembly seat, a paint box is arranged on the other assembly seat, and a pumping structure is arranged on the paint box and the shaft rod, and the pumping structure is used to pump paint to the spraying rack;

[0009] A tensioning structure, wherein the tensioning structure is arranged at the other end of the shaft, and a rotating seat is arranged on the tensioning structure, and a metal cylinder brush is rotatably connected to the rotating seat, and the metal cylinder brush is used for grinding the inner surface of the seamless steel pipe; and

[0010] A grinding transmission assembly is arranged on the rotating seat and an assembly seat, and the grinding transmission assembly is used to drive the metal cylinder brush to rotate.

[0011] In a preferred embodiment, the in-tube pressurization part includes a pressurization disk, a sealing ring fixedly connected to a side surface of the pressurization disk, and a pressurization inlet pipe fixedly passing through the pressurization disk.

[0012] In a preferred embodiment, there are multiple boost fixing structures, and the boost fixing structures include a bracket fixedly connected to the periphery of the boost disk, a threaded rod threadedly connected to the bracket, and a compression tooth block fixedly connected to one end of the threaded rod.

[0013] In a preferred embodiment, an air pressure sensor is provided on another assembly seat, and a pair of assembly seats are provided with accommodating grooves at opposite ends. The driving unit includes a rotating motor fixedly connected to one of the accommodating grooves and a gear pair 1 provided at the output end of the rotating motor, and the rotating motor is connected to the shaft through the gear pair 1.

[0014] In a preferred embodiment, the paint box is fixedly connected in another containing tank, and the pumping structure includes a paint pump arranged on the paint box, a feeding pipe arranged at the output end of the paint pump, a rotating box fixedly connected to one end of the feeding pipe, and the rotating box is rotatably connected to the shaft.

[0015] In a preferred embodiment, a paint channel is provided in the shaft rod, and the paint channel is connected to the spray rack. A paint hole connected to the paint channel is provided on the outer surface of the shaft rod, and the paint hole is arranged on the inner side of the rotating box. Sealing rings are provided at both ends of the rotating box, and the rotating box is rotatably connected to the shaft rod through the sealing ring; a rotary joint is provided on the inner wall of the paint box, and a feed hose is provided at one end of the rotary joint. The feed hose is rotatably connected to the paint box through the rotary joint, and the other end of the rotary joint is connected to the input end of the paint pump.

[0016] In a preferred embodiment, a working cavity is formed between a pair of assembly seats, an air pipe is fixedly passed through one of the assembly seats, and the air pipe is connected to the working cavity, and a filter element is arranged at one end of the air pipe facing away from the working cavity.

[0017] In a preferred embodiment, the tensioning structure includes a guide box, a spring arranged in the guide box, a T-shaped slide bar fixedly connected to the top end of the spring, a slide bar fixedly connected to the bottom end of the spring, and a threaded rod two rotatably connected to the bottom end of the slide bar, the T-shaped slide bar and the slide bar are both slidably connected in the guide box, and the T-shaped slide bar extends to the top position of the guide box, and the threaded rod two arranged on the slide bar is threadedly connected to the guide box; the rotating seat is fixedly connected to one end of the T-shaped slide bar.

[0018] In a preferred embodiment, the grinding transmission assembly includes a hanging plate fixedly connected to the rotating seat, a transmission gear rotatably connected to the hanging plate, a gear ring meshingly connected to the transmission gear, a transmission rod fixedly connected to the shaft end of the transmission gear, a transmission tube plugged into the transmission rod, a gear pair 2 arranged at one end of the transmission tube and a fixed plate fixedly connected to the rotating seat, the gear pair 2 is rotatably connected to the fixed plate, and the gear pair 2 is arranged on the shaft end of the metal cylinder brush, and the transmission tube is transmission-connected to the metal cylinder brush via the gear pair 2.

[0019] A process for surface coating of seamless steel pipes, comprising the following steps: S1, by setting a sliding part inside the pipe inside the seamless steel pipe, and then sealing and fixing the pipeline pressurization part to one end of the seamless steel pipe through a pressurization fixing structure, at this time, an external air pump device of the pressurization fixing structure is used to pressurize the seamless steel pipe, and the pressurized environment inside the seamless steel pipe can push the sliding part inside the pipe to move along the length direction of the seamless steel pipe;

[0020] S2. The shaft is controlled to rotate by the driving unit, and the shaft can drive the metal cylinder brush to realize contact rotation in the seamless steel pipe. At the same time, the grinding transmission assembly can drive the metal cylinder brush to rotate, so that the inner surface of the seamless steel pipe can achieve the effect of impurity removal and grinding. Because the sliding part in the pipe can move and operate in the seamless steel pipe, the grinding waste can be effectively pushed out;

[0021] S3. After the inner surface of the seamless steel pipe is cleaned, the paint is pumped to the spray rack through the pumping structure. The rotation of the shaft can drive the spray rack to perform rotary spraying operations, which can improve the thoroughness and uniformity of the coating spraying on the inner surface of the seamless steel pipe.

[0022] Technical effects and advantages of the present invention:

[0023] 1. The present invention provides an in-pipe pressurizing part and an in-pipe sliding part. The pipeline pressurizing part provides moving power for the pipeline sliding part by increasing the pressure inside the seamless steel pipe. Since the paint box and the spray rack both act on the in-pipe sliding part, the pipeline sliding part can be moved and sprayed along the length direction of the seamless steel pipe. Since the leather cup is slidingly arranged in the seamless steel pipe, it can be used for mobile spraying of seamless steel pipes with small diameters, long pipes or bends. This effectively avoids the technical problems of limited mobile spraying, inconvenient operation and affected spraying effect caused by traditional spraying equipment that moves by external pipes, manual dragging and hand-held operation.

[0024] 2. The present invention sets a metal cylinder brush. When the sliding part inside the tube moves for spraying, the metal cylinder brush can perform rotary grinding on the inner surface of the seamless steel tube in front of the spraying frame. By thoroughly cleaning the residue on the inner surface of the seamless steel tube and cooperating with the moving sliding part inside the tube to push the cleaned waste, the quality of spraying can be improved and the effect of integrated spraying and cleaning can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a schematic structural diagram of a part of a device for surface coating processing of a seamless steel pipe.

[0026] Figure 2 The present invention is a schematic structural diagram of another part of a device for processing surface coating of a seamless steel pipe.

[0027] Figure 3 For the present invention Figure 1 Side view of.

[0028] Figure 4 It is a structural schematic diagram of the boosting fixed structure of the present invention.

[0029] Figure 5 For the present invention Figure 2 Enlarged view of part A in the middle.

[0030] Figure 6 It is a schematic diagram of the planar structure of the paint box, pumping structure and shaft rod of the present invention.

[0031] Figure 7 It is a schematic structural diagram of the tensioning structure, metal brush and grinding transmission assembly of the present invention.

[0032] Figure 8 It is a cross-sectional view of the tensioning structure of the present invention.

[0033] The accompanying drawings are marked as follows: 1, assembly seat; 2, shaft; 3, leather cup; 4, receiving groove; 5, boost plate; 6, sealing ring; 7, boost inlet pipe; 8, boost fixing structure; 81, bracket; 82, threaded rod one; 83, pressing tooth block; 9, driving unit; 91, rotating motor; 92, gear pair one; 10, spraying rack; 11, paint box; 12, pumping structure; 121, paint pump; 122, feeding pipe; 123, rotating box; 13, tensioning structure; 131, guide box; 132, elastic Spring; 133, T-shaped slide bar; 134, slide plate; 135, threaded rod 2; 14, rotating seat; 15, metal cylinder brush; 16, grinding transmission assembly; 161, hanging plate; 162, transmission gear; 163, gear ring; 164, transmission rod; 165, transmission pipe; 166, gear pair 2; 167, fixed plate; 17, air pipe; 18, filter element; 19, paint channel; 20, paint hole; 21, sealing ring; 22, rotary joint; 23, feed hose; 24, air pressure sensor. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Combined with reference Figure 1-Figure 8 The present invention provides a device for surface coating processing of seamless steel pipes, including a sliding part in the pipe, a pressurizing part in the pipe and a pressurizing fixed structure 8. The actual weight of the sliding part in the pipe and the structure on the sliding part in the pipe is in the range of 15-20 kilograms, and it is convenient to lift. The sliding part in the pipe includes a pair of assembly seats 1 arranged in the seamless steel pipe, a shaft 2 rotatably connected to the pair of assembly seats 1, and a leather cup 3 detachably connected to each assembly seat 1. The leather cup 3 is a rubber leather cup. Under the pressure operation provided in the seamless steel pipe, the leather cup 3 can make the sliding part in the pipe seal. Sliding in the seamless steel pipe, so that it can be suitable for moving longer and curved seamless steel pipes for spraying, the leather cup 3 can be disassembled and connected by bolts, and the leather cup 3 with a suitable diameter of the seamless steel pipe is selected and installed on the assembly seat 1, which can meet the applicability of the sliding part in the pipe to be used in the seamless steel pipe, the leather cup 3 is slidably connected in the seamless steel pipe, the inner pressurization part of the pipe is arranged at the end of the seamless steel pipe, and the inner pressurization part of the pipe is used to pressurize the seamless steel pipe to push the leather cup 3 to slide in the seamless steel pipe, and the pressurization fixing structure 8 is used to fix the pipeline pressurization part on the seamless steel pipe.

[0036] The boost part inside the tube includes a boost disk 5, a sealing ring 6 fixedly connected to the side of the boost disk 5, and a boost inlet pipe 7 fixedly passing through the boost disk 5. In the present application, the boost inlet pipe 7 can be externally connected to an air pump device, so that the boost control inside the seamless steel tube can be convenient. The setting of the sealing ring 6 can increase the boost sealing performance.

[0037] There are multiple boost fixing structures 8, and the boost fixing structures 8 include a bracket 81 fixedly connected to the periphery of the boost disk 5, a threaded rod 82 threadedly connected to the bracket 81, and a pressing tooth block 83 fixedly connected to one end of the threaded rod 82. In the present application, a rotating head is provided at the other end of the threaded rod 82, and the threaded rod 82 is driven to rotate by the rotating head. The threaded rod 82 can descend on the bracket 81 under the action of the threaded path to press the pressing tooth block 83 onto the outer surface of the end of the seamless steel pipe, so that the boost position of the boost part in the pipe can be fixed.

[0038] The above-mentioned device for surface coating processing of seamless steel pipe also includes a driving unit 9, a spraying frame 10, a tensioning structure 13 and a grinding transmission assembly 16.

[0039] Another assembly seat 1 is provided with an air pressure sensor 24, and the air pressure sensor 24 may have a built-in wireless communication module, so that the air pressure data can be conveniently transmitted to the control system of the air pump equipment. The air pressure sensor 24 can be used to sense the boost state between a leather cup 3 and a boost disk 5. The data can support the output of the external air pump equipment to ensure the boost stability. A pair of assembly seats 1 are provided with a receiving groove 4 at the opposite ends, and the receiving groove 4 can increase the assembly space inside the assembly seat 1. In the present application, a battery pack can be arranged in the receiving groove 4, and the battery pack can cooperate with the controller to be electrically connected to the electrical components of the present application.

[0040] The driving unit 9 is arranged on one of the assembly seats 1. The driving unit 9 is used to drive the shaft 2 to rotate. The driving unit 9 includes a rotating motor 91 fixedly connected to one of the accommodating grooves 4 and a gear pair 92 arranged at the output end of the rotating motor 91. The rotating motor 91 is connected to the shaft 2 through the gear pair 92. In the present application, the gear pair 92 is composed of a pair of meshing bevel gears, one bevel gear is fixed at the output end of the rotating motor 91, and the other bevel gear is fixed on the shaft 2. In this way, when the rotating motor 91 is driven, the shaft 2 can be driven to rotate.

[0041] The spraying rack 10 is arranged at one end of the shaft 2, and the spraying rack 10 is located on one side of another assembly seat 1. A spray head is arranged on the spraying rack 10, and a paint box 11 is arranged on the other assembly seat 1. The paint box 11 is provided with a box cover, and the box cover is an air pressure regulating valve. A pumping structure 12 is arranged on the paint box 11 and the shaft 2, and the pumping structure 12 is used to pump paint to the spraying rack 10.

[0042] The paint box 11 is fixedly connected in another containing tank 4, and the pumping structure 12 includes a paint pump 121 arranged on the paint box 11, a feeding pipe 122 arranged at the output end of the paint pump 121, and a rotating box 123 fixedly connected to one end of the feeding pipe 122, and the rotating box 123 is rotatably connected to the shaft 2.

[0043] A paint channel 19 is provided in the shaft 2, and the paint channel 19 is connected to the spray frame 10. A paint hole 20 connected to the paint channel 19 is provided on the outer surface of the shaft 2. The paint hole 20 is arranged on the inner side of the rotating box 123. Sealing rings 21 are provided at both ends of the rotating box 123. The rotating box 123 is rotatably connected to the shaft 2 through the sealing ring 21. The rotating box 123 can be rotatably set on the shaft 2 through the sealing ring 21. In this way, after the paint is pumped into the feeding pipe 122 by the paint pump 121, the paint can enter the paint channel 19 through the rotating box 123 and the paint hole 29 in sequence.

[0044] The inner wall of the paint box 11 is provided with a rotary joint 22, and a feed hose 23 is provided at one end of the rotary joint 22. In the present application, the feed end of the feed hose 23 is provided with a counterweight. The setting of the counterweight can make the feed hose 23 always in a vertical state. The feed hose 23 is rotatably connected to the paint box 11 through the rotary joint 22, and the other end of the rotary joint 22 is connected to the input end of the paint pump 121. The rotary joint 22 cooperates with the setting of the feed hose 23. When the sliding part in the pipe moves and tilts in the seamless steel pipe, the counterweight of the feed hose 23 is set at this time, and the feed hose 23 and the rotary joint 22 are rotated. In this way, the feed hose 23 can effectively connect the anti-corrosion paint to the paint pump 121 in real time to ensure the reliability of the supply.

[0045] In this embodiment, the assembly seat 1 with the leather cup 3 is sent into the seamless steel pipe, and the pressure in the seamless steel pipe is controlled by the pressure inlet pipe 7. In this way, the leather cup 3 can drive the entire sliding part in the pipe to move in the seamless steel pipe, and the shaft 2 is controlled to rotate by the driving unit 9. At this time, the spray rack 10 can rotate, and the anti-corrosion paint in the paint box 11 is extracted by the paint pump 121 and pumped into the rotating box 123, the paint hole 29 and the paint channel 19 in turn. In this way, the spray rack 10 can move and rotate the inner surface of the seamless steel pipe for spraying.

[0046] A working chamber is formed between a pair of assembly seats 1, in which an air pipe 17 is fixedly passed through one of the assembly seats 1, and the air pipe 17 is connected to the working chamber, and a filter element 18 is arranged at the end of the air pipe 17 facing away from the working chamber, and the filter element 18 can filter the air, thereby preventing the air pipe 17 from being contaminated during the cleaning operation of the seamless steel pipe. The air pipe 17 cooperates with the setting of the filter element 18, thereby making the working chamber present a stable positive pressure environment, so that the rotating motor 91 and the paint pump 121 can work more stably.

[0047] The tensioning structure 13 is arranged at the other end of the shaft rod 2. A rotating seat 14 is arranged on the tensioning structure 13. A metal cylinder brush 15 is rotatably connected to the rotating seat 14. The metal cylinder brush 15 is used for grinding the inner surface of the seamless steel pipe.

[0048] The tensioning structure 13 includes a guide box 131, a spring 132 arranged in the guide box 131, a T-shaped slide bar 133 fixedly connected to the top end of the spring 132, a slide plate 134 fixedly connected to the bottom end of the spring 132 and a threaded rod 135 rotatably connected to the bottom end of the slide plate 134. The T-shaped slide bar 133 and the slide plate 134 are both slidably connected in the guide box 131, and the T-shaped slide bar 133 extends to the top position of the guide box 131; the rotating seat 14 is fixedly connected to one end of the T-shaped slide bar 133, and a rotating head is also provided at one end of the threaded rod 135 in the present application. By rotating the threaded rod 135, the slide plate 134 slidably arranged in the guide box 131 can be raised and lowered. The liftable slide plate 134 can change the compression performance of the spring 132 and adjust the height of the metal cylinder brush 15 at the same time, so that it can adapt to the grinding and cleaning of seamless steel pipes of different diameters.

[0049] The grinding transmission assembly 16 is arranged on the rotating seat 14 and an assembly seat 1, and the grinding transmission assembly 16 is used to drive the metal cylinder brush 15 to rotate.

[0050] The grinding transmission assembly 16 includes a hanging plate 161 fixedly connected to the rotating seat 14, a transmission gear 162 rotatably connected to the hanging plate 161, a gear ring 163 meshingly connected to the transmission gear 162, a transmission rod 164 fixedly connected to the axial end of the transmission gear 162, a transmission tube 165 inserted into the transmission rod 164, a gear pair 166 arranged at one end of the transmission tube 165 and a fixed plate 167 fixedly connected to the rotating seat 14, the gear pair 166 is rotatably connected to the fixed plate 167, and the gear pair 166 is arranged at the axial end of the metal cylinder brush 15, the transmission tube 165 is transmission-connected to the metal cylinder brush 15 through the gear pair 166, in the present application, the gear pair 166 is also composed of a pair of meshingly connected bevel gears, one bevel gear is fixedly connected to one end of the transmission tube 165, and is rotatably connected to the fixed plate 167 through an axis, and the other bevel gear is fixedly connected to the axial end of the metal cylinder brush 15, in the present application, the transmission rod 164 is arranged in a cross structure.

[0051] In this embodiment, when the sliding part in the tube slides in the seamless steel tube, when the driving unit 9 drives the shaft rod 2 to rotate, the shaft rod 2 can drive the metal cylinder brush 15 on the tensioning structure 13 to rotate in the seamless steel tube. During the rotation, the transmission gear 162 can engage with the gear ring 163, so that the transmission rod 164 can obtain rotational force to drive the gear pair 2 166 through the transmission tube 165 to drive the metal cylinder brush 15 to rotate. In this way, the metal cylinder brush 15 can rotate and grind the inner wall of the seamless steel tube during the rotation so as to remove metal residues on the inner surface of the seamless steel tube. The cleaned metal residues can be pushed out during the movement of the leather cup 3. By ensuring the proximity to the inner surface of the seamless steel tube, the quality of the subsequent follow-up spray rack 10 operation can be improved, and the effect of integrated spraying and cleaning operations can be met.

[0052] It is worth noting that, because the transmission tube 165 and the transmission rod 164 are plug-fitted, when adjusting the height of the metal cylinder brush 15 or the tension of the spring 132 , the transmission provided by the grinding transmission assembly 16 for the metal cylinder brush 15 can be timely.

[0053] A process for processing a surface coating of a seamless steel pipe, which is applied to a device for processing a surface coating of a seamless steel pipe, comprises the following steps:

[0054] S1. The inner sliding part of the pipe is arranged in the seamless steel pipe, and then the pipeline pressurization part is sealed and fixed to one end of the seamless steel pipe through the pressurization fixing structure 8. At this time, the pressurization fixing structure 8 is connected to an external air pump device to pressurize the seamless steel pipe. The pressurized environment in the seamless steel pipe can push the inner sliding part of the pipe to move along the length direction of the seamless steel pipe.

[0055] S2. The shaft 2 is controlled to rotate by the driving unit 9, so that the shaft 2 can drive the metal cylinder brush 15 to realize contact rotation in the seamless steel pipe. At the same time, the grinding transmission assembly can drive the metal cylinder brush 15 to rotate, so that the inner surface of the seamless steel pipe can achieve the effect of impurity removal and grinding. Because the sliding part in the pipe can move in the seamless steel pipe, the grinding waste can be effectively pushed out;

[0056] S3. After the inner surface of the seamless steel pipe is cleaned, the paint is pumped to the spray rack 10 through the pumping structure 12. The rotation of the shaft 2 can drive the spray rack 10 to perform a rotary spraying operation, which can improve the thoroughness and uniformity of the coating spraying on the inner surface of the seamless steel pipe.

[0057] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0058] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0059] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for processing the surface coating of a seamless steel pipe, characterized in that: The invention comprises an in-pipe sliding part, an in-pipe pressurizing part and a pressurizing fixing structure (8), wherein the in-pipe sliding part comprises a pair of assembly seats (1) arranged in a seamless steel pipe, a shaft (2) rotatably connected to the pair of assembly seats (1) and a leather cup (3) detachably connected to each assembly seat (1), wherein the leather cup (3) is slidably connected in the seamless steel pipe, the in-pipe pressurizing part is arranged at the end of the seamless steel pipe, and is used to pressurize the seamless steel pipe to push the leather cup (3) to slide in the seamless steel pipe, and the pressurizing fixing structure (8) is used to fix the pipeline pressurizing part on the seamless steel pipe; Also includes: A driving unit (9), the driving unit (9) being arranged on one of the assembly seats (1), and the driving unit (9) being used to drive the shaft (2) to rotate; A spraying rack (10), wherein the spraying rack (10) is arranged at one end of the shaft (2), and the spraying rack (10) is located on one side of another assembly seat (1), a paint box (11) is arranged on the other assembly seat (1), and a pumping structure (12) is arranged on the paint box (11) and the shaft (2), and the pumping structure (12) is used to pump paint to the spraying rack (10); a tensioning structure (13), the tensioning structure (13) being arranged at the other end of the shaft (2), the tensioning structure (13) being provided with a rotating seat (14), the rotating seat (14) being rotatably connected with a metal cylinder brush (15), the metal cylinder brush (15) being used for grinding the inner surface of the seamless steel pipe; and A grinding transmission assembly (16), wherein the grinding transmission assembly (16) is arranged on the rotating seat (14) and an assembly seat (1), and the grinding transmission assembly (16) is used to drive the metal cylinder brush (15) to rotate.

2. The device for surface coating of seamless steel pipe according to claim 1, characterized in that: The in-tube pressurization part comprises a pressurization disk (5), a sealing ring (6) fixedly connected to the side of the pressurization disk (5), and a pressurization inlet tube (7) fixedly passing through the pressurization disk (5).

3. The device for surface coating of seamless steel pipe according to claim 2, characterized in that: The number of the boost fixing structures (8) is plural, and the boost fixing structures (8) include a bracket (81) fixedly connected to the periphery of the boost disk (5), a threaded rod (82) threadedly connected to the bracket (81), and a pressing tooth block (83) fixedly connected to one end of the threaded rod (82).

4. The device for surface coating of seamless steel pipe according to claim 1, characterized in that: A pressure sensor (24) is arranged on the other assembly seat (1), and a receiving groove (4) is arranged at the opposite ends of the pair of assembly seats (1). The driving unit (9) comprises a rotating motor (91) fixedly connected in one of the receiving grooves (4) and a gear pair (92) arranged at the output end of the rotating motor (91), and the rotating motor (91) is transmission-connected to the shaft (2) via the gear pair (92).

5. The device for surface coating of seamless steel pipe according to claim 3, characterized in that: The paint box (11) is fixedly connected in another containing tank (4); the pumping structure (12) comprises a paint pump (121) arranged on the paint box (11); a feeding pipe (122) arranged at the output end of the paint pump (121) is fixedly connected to a rotating box (123) at one end of the feeding pipe (122); and the rotating box (123) is rotatably connected to the shaft (2).

6. The device for surface coating of seamless steel pipe according to claim 5, characterized in that: A paint channel (19) is provided in the shaft (2), the paint channel (19) is connected to the spray frame (10), a paint hole (20) is provided on the outer surface of the shaft (2) and is connected to the paint channel (19), the paint hole (20) is arranged on the inner side of the rotating box (123), sealing rings (21) are provided at both ends of the rotating box (123), and the rotating box (123) is rotatably connected to the shaft (2) via the sealing ring (21); The inner wall of the paint box (11) is provided with a rotary joint (22), one end of the rotary joint (22) is provided with a feed hose (23), the feed hose (23) is rotatably connected to the paint box (11) through the rotary joint (22), and the other end of the rotary joint (22) is connected to the input end of the paint pump (121).

7. The device for surface coating of seamless steel pipe according to claim 1, characterized in that: A working chamber is formed between a pair of assembly seats (1), an air pipe (17) is fixedly passed through one of the assembly seats (1), and the air pipe (17) is connected to the working chamber, and a filter element (18) is arranged at one end of the air pipe (17) facing away from the working chamber.

8. The device for surface coating of seamless steel pipe according to claim 1, characterized in that: The tensioning structure (13) comprises a guide box (131), a spring (132) arranged in the guide box (131), a T-shaped slide bar (133) fixedly connected to the top end of the spring (132), a slide plate (134) fixedly connected to the bottom end of the spring (132), and a second threaded rod (135) rotatably connected to the bottom end of the slide plate (134), the T-shaped slide bar (133) and the slide plate (134) are both slidably connected in the guide box (131), and the T-shaped slide bar (133) extends to the top position of the guide box (131), and the second threaded rod (135) arranged on the slide plate (134) is threadedly connected to the guide box (131); The rotating seat (14) is fixedly connected to one end of the T-shaped sliding rod (133).

9. The device for surface coating of seamless steel pipe according to claim 1, characterized in that: The grinding transmission assembly (16) comprises a hanging plate (161) fixedly connected to the rotating seat (14), a transmission gear (162) rotatably connected to the hanging plate (161), a gear ring (163) meshingly connected to the transmission gear (162), a transmission rod (164) fixedly connected to the shaft end of the transmission gear (162), a transmission tube (165) plugged into the transmission rod (164), a second gear pair (166) arranged at one end of the transmission tube (165) and a fixed plate (167) fixedly connected to the rotating seat (14), the second gear pair (166) being rotatably connected to the fixed plate (167), and the second gear pair (166) being arranged at the shaft end of the metal cylinder brush (15), and the transmission tube (165) being transmission-connected to the metal cylinder brush (15) via the second gear pair (166).

10. A process for processing a surface coating of a seamless steel pipe, which is applied to a device for processing a surface coating of a seamless steel pipe as claimed in any one of claims 1 to 9, characterized in that: The steps include: S1. The inner sliding part of the pipe is arranged in the seamless steel pipe, and the pipe pressurization part is sealed and fixed to one end of the seamless steel pipe through the pressurization fixing structure (8). At this time, the pressurization fixing structure (8) is connected to an external air pump device to pressurize the seamless steel pipe. The pressurized environment in the seamless steel pipe can push the inner sliding part of the pipe to move along the length direction of the seamless steel pipe. S2. The shaft (2) is controlled to rotate by the driving unit (9), so that the shaft (2) can drive the metal brush (15) to realize contact rotation in the seamless steel pipe. At the same time, the grinding transmission assembly can drive the metal brush (15) to rotate, so that the inner surface of the seamless steel pipe can achieve the effect of removing impurities and grinding. Because the sliding part in the pipe can move and operate in the seamless steel pipe, the grinding waste can be effectively pushed out; S3. After the inner surface of the seamless steel pipe is cleaned, the coating is pumped to the spraying frame (10) with pressure through the pumping structure (12). The rotation of the shaft (2) can drive the spraying frame (10) to perform a rotary spraying operation, thereby improving the thoroughness and uniformity of the coating spraying on the inner surface of the seamless steel pipe.

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