A stainless steel seamless pipe coating device
By using a rotating screw and a gear and rack system driven by a motor, the problem of localized coating defects caused by clamping in stainless steel seamless pipe spraying equipment has been solved, achieving all-round coating of stainless steel seamless pipes and improving spraying quality and appearance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 博通精密科技(浙江)有限公司
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-24
AI Technical Summary
Existing stainless steel seamless pipe spraying equipment has the problem of being unable to spray in certain areas during the clamping process, resulting in uneven spraying and affecting product quality and appearance.
The second screw is rotated to drive the threaded block and connecting block. By pressing the connecting disc and rotating block, the inner wall of the stainless steel seamless tube is clamped. Combined with the gear and rack system driven by the motor, the tube is rotated to achieve comprehensive coating.
It achieves all-around coating of seamless stainless steel tubes, avoiding dead corners, improving coating quality and appearance, and is suitable for high-precision industrial applications.
Smart Images

Figure CN224542209U_ABST
Abstract
Description
Technical Field
[0001] This utility model application relates to the field of stainless steel seamless pipe coating technology, specifically to a stainless steel seamless pipe coating device. Background Technology
[0002] Stainless steel pipe is a hollow, long, round steel material widely used in industrial pipelines for petroleum, chemical, medical, food, light industry, and machinery, as well as mechanical structural components. During the processing of stainless steel pipe, spraying equipment is required to paint the surface of the stainless steel pipe.
[0003] Chinese Patent Publication No. CN222132289U discloses a stainless steel seamless pipe spraying device, including a frame with a base welded to the top. A square groove is formed on the base, and a collection hopper is welded between the inner walls of the square groove. A flexible hose is fixedly connected to the bottom of the collection hopper, and a screen is welded between the inner walls of the collection hopper. A fixing plate is welded to the side wall of the frame, and a collection box is placed on the fixing plate. A connecting pipe is installed at the top of the collection box. Excess spray material drips into the collection hopper. The collection hopper and screen are made of polytetrafluoroethylene (PTFE). The PTFE sheet has a smooth surface and does not adhere to paint. After the paint drips into the collection hopper, it slides down the slope to the lowest point and then flows into the collection box through the flexible hose. This achieves rapid collection of excess paint, avoids paint waste, and helps reduce the paint waste rate.
[0004] The device uses multiple clamps to securely hold the seamless stainless steel tube, ensuring its stability during subsequent spraying operations. However, in actual spraying, the clamps are in close contact with the surface of the seamless stainless steel tube, and these contact areas are completely blocked by the clamps, preventing the spraying material from covering these blocked areas. This localized missing coating prevents a uniform and complete coating coverage of the seamless stainless steel tube, thus affecting the overall coating quality and appearance of the product. Especially in industrial applications requiring high-precision spraying, this problem of uncoated areas can lead to reduced protective performance or unacceptable appearance. Utility Model Content
[0005] To address the aforementioned issues, a stainless steel seamless pipe coating device is provided. Rotating the second screw moves the threaded block, which in turn causes the connecting block on its side wall to press against the connecting disc. This causes the connecting disc to move parallel inside the positioning cylinder. As the connecting disc moves, it further presses against the rotating block, causing the other end of the rotating block to press against the top block. This causes the pressing block to extend outward from the positioning cylinder, thereby pressing against the inner wall of the stainless steel seamless pipe. This achieves internal clamping of the stainless steel, preventing dead zones from being coated.
[0006] To address the existing technical problems, this utility model application provides a stainless steel seamless pipe coating device, including a coating frame. Rotary disks are movably arranged on both sides of the interior of the coating frame. Clamping components for clamping the stainless steel seamless pipe are arranged on one side of each of the two rotating disks, and a rotating component for rotating and spraying the stainless steel seamless pipe is arranged on the other side of one of the rotating disks.
[0007] Preferably, the rotating assembly includes a rotating rod disposed on the outer wall of one of the rotating disks, one end of the rotating rod extending to the outside of the coating frame and provided with a gear, support blocks symmetrically disposed on the outer side of the coating frame, and a rack meshing with the gear between the two support blocks.
[0008] Preferably, a first screw is rotatably disposed between the two support blocks, and a motor is disposed on the outer wall of one of the support blocks. The output shaft of the motor is connected to one end of the first screw via a coupling. An L-shaped push block is disposed on the external thread of the first screw, and the inner wall of the L-shaped push block is rotatably connected to one end of the rotating rod.
[0009] Preferably, the clamping assembly includes a second screw rotatably disposed inside the positioning cylinder, the external thread of the second screw being provided with a threaded block, a connecting block being rotatably disposed at one end of the threaded block, a connecting disk being rotatably disposed at the other end of the connecting block, a plurality of rotating blocks being rotatably disposed on the side wall of the connecting disk, a top block being rotatably disposed at one end of the rotating block, and a pressing block being disposed at one end of the top block extending to the outside of the positioning cylinder and being used to press the inner wall of the stainless steel seamless tube.
[0010] Preferably, the outer walls of the plurality of extrusion blocks are provided with anti-slip pads to prevent the stainless steel seamless tube from sliding.
[0011] Preferably, a guide rod is provided on one inner wall of the coating frame, a slider is slidably provided on the outside of the guide rod, a telescopic rod is provided on the side wall of the slider, and the telescopic end of the telescopic rod is rotatably connected to the side wall of another rotating disk.
[0012] The advantages of this utility model application compared to the prior art are:
[0013] 1. By rotating the second screw, the threaded block is moved. When the threaded block moves, it will cause the connecting block on its side wall to squeeze the connecting plate, so that the connecting plate moves parallel inside the positioning cylinder. When the connecting plate moves, it will further squeeze the rotating block, so that the other end of the rotating block squeezes the top block, causing the squeezing block to extend outward of the positioning cylinder, thereby squeezing the inner wall of the stainless steel seamless pipe, realizing internal clamping of the stainless steel, and preventing dead corners that cannot be coated.
[0014] 2. The motor drives the second screw to rotate, and at the same time the L-shaped push block outside the second screw will also move, which in turn drives the rotating rod on its side wall to move. With the cooperation of gears and racks, the rotating rod will also rotate while moving, which will further drive the stainless steel seamless tube outside the positioning cylinder to rotate while moving, thereby coating the stainless steel seamless tube completely and facilitating the next step of the coated stainless steel seamless tube. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of a stainless steel seamless pipe coating device.
[0016] Figure 2 This is a side view of a stainless steel seamless tube coating device.
[0017] Figure 3 This is a schematic diagram of some components in a stainless steel seamless pipe coating device.
[0018] Figure 4 This is a schematic diagram of the structure of a moving component in a stainless steel seamless pipe coating device.
[0019] Figure 5 This is a schematic diagram of the internal structure of the positioning cylinder in a stainless steel seamless pipe coating device.
[0020] Figure 6 This is a schematic diagram of the guide rod and slider in a stainless steel seamless pipe coating device.
[0021] The following are the labels in the diagram: 1. Coating frame; 2. Telescopic rod; 3. Rotating disk; 4. Support block; 5. Positioning cylinder; 6. Motor; 7. First screw; 8. Rack; 9. L-shaped push block; 10. Gear; 11. Rotating rod; 12. Second screw; 13. Threaded block; 14. Connecting block; 15. Connecting disk; 16. Rotating block; 17. Top block; 18. Anti-slip pad; 19. Extrusion block; 20. Guide rod; 21. Slider. Detailed Implementation
[0022] To further understand the features, technical means, and specific objectives and functions achieved by this utility model application, the following detailed description of this utility model application is provided in conjunction with the accompanying drawings and specific embodiments.
[0023] like Figures 1 to 6 As shown, this utility model application provides:
[0024] A stainless steel seamless pipe coating device includes a coating frame 1. Rotary disks 3 are movably arranged on both sides of the interior of the coating frame 1. Clamping components for clamping the stainless steel seamless pipe are arranged on one side of the two rotating disks 3 facing each other. A rotating component for rotating and spraying the stainless steel seamless pipe is arranged on the other side of one of the rotating disks 3.
[0025] By squeezing the inner wall of the stainless steel seamless tube with the clamping component, the stainless steel is internally clamped to prevent dead corners from being coated. Then, by rotating the component, the stainless steel seamless tube is rotated while moving, thereby coating the stainless steel seamless tube comprehensively and facilitating the next step of the coated stainless steel seamless tube.
[0026] like Figure 5 As shown, the rotating assembly includes a rotating rod 11 disposed on the outer wall of one of the rotating disks 3. One end of the rotating rod 11 extends to the outside of the coating frame 1 and is provided with a gear 10. Support blocks 4 are symmetrically disposed on the outer side of the coating frame 1, and a rack 8 that meshes with the gear 10 is disposed between the two support blocks 4.
[0027] The gear 10 can drive the stainless steel seamless tube to rotate, which facilitates the comprehensive coating of the stainless steel seamless tube.
[0028] like Figure 4 As shown, a first screw 7 is rotatably arranged between the two support blocks 4. A motor 6 is provided on the outer wall of one of the support blocks 4. The output shaft of the motor 6 is connected to one end of the first screw 7 through a coupling. An L-shaped push block 9 is provided on the external thread of the first screw 7. The inner wall of the L-shaped push block 9 is rotatably connected to one end of the rotating rod 11.
[0029] The start motor 6 drives the second screw 12 to rotate. At the same time, the L-shaped push block 9 on the outside of the second screw 12 also moves, further driving the rotating rod 11 on its side wall to move. With the cooperation of the gear 10 and the rack 8, the rotating rod 11 also rotates while moving.
[0030] like Figure 3 and Figure 4 As shown, the clamping assembly includes a second screw 12 rotatably disposed inside the positioning cylinder 5. The external thread of the second screw 12 is provided with a threaded block 13. One end of the threaded block 13 is rotatably provided with a connecting block 14. The other end of the connecting block 14 is rotatably provided with a connecting disc 15. The side wall of the connecting disc 15 is rotatably provided with multiple rotating blocks 16. One end of the rotating block 16 is rotatably provided with a top block 17. One end of the top block 17 extends to the outside of the positioning cylinder 5 and is provided with a pressing block 19 for pressing the inner wall of the stainless steel seamless tube.
[0031] The second screw 12 drives the threaded block 13 to move. When the threaded block 13 moves, it drives the connecting block 14 on its side wall to press the connecting plate 15, so that the connecting plate 15 moves parallel inside the positioning cylinder 5. When the connecting plate 15 moves, it will further press the rotating block 16, so that the other end of the rotating block 16 presses the top block 17, driving the pressing block 19 to extend outward of the positioning cylinder 5, thereby pressing the inner wall of the stainless steel seamless tube and realizing the internal clamping of the stainless steel.
[0032] like Figure 5 As shown, the outer walls of multiple extrusion blocks 19 are provided with anti-slip pads 18 to prevent the stainless steel seamless tube from sliding.
[0033] The anti-slip pad 18 increases the friction between the extrusion block 19 and the inner wall of the stainless steel seamless tube, thereby preventing the stainless steel seamless tube from sliding during movement.
[0034] like Figure 6 As shown, a guide rod 20 is provided on one inner wall of the coating frame 1, and a slider 21 is slidably provided on the outside of the guide rod 20. A telescopic rod 2 is provided on the side wall of the slider 21, and the telescopic end of the telescopic rod 2 is rotatably connected to the side wall of another rotating disk 3.
[0035] The telescopic rod 2 can move one of the clamping components, which makes it convenient to coat stainless steel seamless pipes of different lengths.
[0036] Working principle: When coating stainless steel seamless tubes, the stainless steel seamless tube is first placed between two positioning cylinders 5. Then, the second screw 12 is rotated to drive the threaded block 13 to move. When the threaded block 13 moves, it drives the connecting block 14 on its side wall to squeeze the connecting plate 15, so that the connecting plate 15 moves parallel inside the positioning cylinder 5. When the connecting plate 15 moves, it further squeezes the rotating block 16, so that the other end of the rotating block 16 squeezes the top block 17, driving the squeezing block 19 to extend outward from the positioning cylinder 5, thereby squeezing the inner wall of the stainless steel seamless tube, realizing internal clamping of the stainless steel, and preventing dead corners from being coated. Then, the motor 6 is started to drive the second screw 12 to rotate. At the same time, the L-shaped push block 9 outside the second screw 12 will also move, further driving the rotating rod 11 on its side wall to move. With the cooperation of the gear 10 and the rack 8, the rotating rod 11 will also rotate while moving, further driving the stainless steel seamless tube outside the positioning cylinder 5 to rotate while moving, thereby coating the stainless steel seamless tube comprehensively and facilitating the next step of the coated stainless steel seamless tube.
[0037] The above embodiments merely illustrate one or several implementation methods of a stainless steel seamless tube coating device according to this utility model application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model application, and these all fall within the protection scope of this utility model application. Therefore, the protection scope of this utility model application should be determined by the appended claims.
[0038] In this utility model application, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model application according to the specific circumstances.
Claims
1. A stainless steel seamless pipe coating device, characterized in that, The coating includes a coating frame (1), on both sides of the coating frame (1) are movably provided with rotating disks (3), and on the opposite side of the two rotating disks (3) are provided clamping components for clamping stainless steel seamless tubes, and on the other side of one of the rotating disks (3) are provided rotating components for rotating stainless steel seamless tubes. The clamping assembly includes a second screw (12) rotatably disposed inside the positioning cylinder (5). The external thread of the second screw (12) is provided with a threaded block (13). One end of the threaded block (13) is rotatably provided with a connecting block (14). The other end of the connecting block (14) is rotatably provided with a connecting disc (15). The side wall of the connecting disc (15) is rotatably provided with a plurality of rotating blocks (16). One end of the rotating block (16) is rotatably provided with a top block (17). One end of the top block (17) extends to the outside of the positioning cylinder (5) and is provided with a pressing block (19) for pressing the inner wall of the stainless steel seamless tube.
2. The stainless steel seamless tube coating device according to claim 1, characterized in that, The rotating assembly includes a rotating rod (11) disposed on the outer wall of one of the rotating disks (3). One end of the rotating rod (11) extends to the outside of the coating frame (1) and is provided with a gear (10). Support blocks (4) are symmetrically arranged on the outer side of the coating frame (1). A rack (8) that meshes with the gear (10) is provided between the two support blocks (4).
3. The stainless steel seamless tube coating device according to claim 2, characterized in that, A first screw (7) is rotatably arranged between the two support blocks (4). A motor (6) is provided on the outer wall of one of the support blocks (4). The output shaft of the motor (6) is connected to one end of the first screw (7) through a coupling. An L-shaped push block (9) is provided on the external thread of the first screw (7). The inner wall of the L-shaped push block (9) is rotatably connected to one end of the rotating rod (11).
4. The stainless steel seamless tube coating apparatus according to claim 1, characterized in that, The outer walls of the multiple extrusion blocks (19) are provided with anti-slip pads (18) to prevent the stainless steel seamless tube from sliding.
5. The stainless steel seamless tube coating apparatus according to claim 1, characterized in that, A guide rod (20) is provided on one inner wall of the coating frame (1), and a slider (21) is slidably provided on the outside of the guide rod (20). A telescopic rod (2) is provided on the side wall of the slider (21), and the telescopic end of the telescopic rod (2) is rotatably connected to the side wall of another rotating disk (3).