A plastic-coated pipe spraying device

Abstract

This utility model discloses a coating device for plastic-coated pipes, relating to the field of plastic-coated pipe production technology. The utility model includes a frame, on which a lifting frame is slidably mounted. Four support frames are mounted on the lifting frame, and bottom wheels and side wheels are rotatably mounted on the support frames. An outer spraying component and an inner spraying pipe are mounted on the frame. The outer spraying component is used to spray anti-corrosion coating onto the outer surface of the plastic-coated pipe. A drive disc is rotatably mounted on the frame, and multiple synchronously centered positioning plates are configured on the drive disc. Multiple inner spraying nozzles are mounted on the inner spraying pipe. This utility model integrates the functions of inner and outer surface spraying, allowing for the sequential and uniform spraying of anti-corrosion coating onto the inner and outer surfaces of the plastic-coated pipe. It eliminates the need for multiple separate machines, reducing equipment occupancy. Furthermore, it is easy to operate and improves production efficiency, thus making it more practical.

Description

Technical Field

[0001] This utility model relates to the field of plastic-coated pipe production technology, specifically to a plastic-coated pipe spraying device. Background Technology

[0002] Plastic-coated pipe, also known as plastic-coated steel pipe or composite plastic-coated pipe, is a composite pipe with a plastic layer coated on the inner and outer surfaces of a steel pipe through a special process. During the production process, anti-corrosion coatings need to be sprayed on the inner and outer surfaces to improve corrosion resistance, effectively isolate the plastic-coated pipe from contact with corrosive media, and extend its service life. In the existing technology, the spraying of anti-corrosion coatings on the inner and outer surfaces usually requires multiple machines to be used separately, which results in high equipment occupancy, complicated operation, and reduced production efficiency. Therefore, a plastic-coated pipe spraying device is proposed. Utility Model Content

[0003] The purpose of this utility model is to solve the technical problem that spraying anti-corrosion coatings on internal and external surfaces usually requires multiple separate machines, which results in high equipment occupancy, complicated operation, and reduced production efficiency. This utility model provides a plastic-coated pipe spraying device.

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0005] A plastic-coated pipe spraying device includes a frame, a lifting frame slidably mounted on the frame, four support frames mounted on the lifting frame, bottom wheels and side wheels rotatably mounted on the support frames, an outer spraying component and an inner spraying pipe mounted on the frame, the outer spraying component being used to spray anti-corrosion coating onto the outer surface of the plastic-coated pipe, a drive disc rotatably mounted on the frame, a plurality of synchronously centered sliding positioning plates being configured on the drive disc, and a plurality of inner spray nozzles being mounted on the inner spraying pipe.

[0006] Furthermore, the frame is equipped with a hydraulic push rod and multiple limit rods, and the lifting frame is slidably mounted on the multiple limit rods. The movable end of the hydraulic push rod is connected to the lifting frame.

[0007] Furthermore, the bottom wheel surface is constructed with anti-slip texture.

[0008] Furthermore, a connecting rod is rotatably mounted on the lifting frame, wherein both bottom wheels are connected to the connecting rod.

[0009] Furthermore, the external spraying component includes a transverse block slidably mounted on a frame, a lead screw threaded through the transverse block is rotatably mounted on the frame, an external spray head is mounted on the transverse block, and a flexible hose is connected to the external spray head.

[0010] Furthermore, a three-way pipe is provided on the frame, and two valves are provided on the three-way pipe. The inner spray pipe, the hose, and the free end are respectively connected to one of the two ends of the three-way pipe.

[0011] Furthermore, the drive disk is provided with an external gear ring, the frame is provided with a drive motor, and the output shaft of the drive motor is provided with a drive gear that meshes with the external gear ring.

[0012] Furthermore, the drive disk is rotatably provided with a bevel gear ring and multiple screws, multiple positioning plates are threadedly engaged with multiple screws respectively, and the screws are provided with a first bevel gear that meshes with the bevel gear ring.

[0013] The beneficial effects of this utility model are as follows: This utility model integrates the functions of internal and external surface spraying, and can uniformly spray anti-corrosion coating on the internal and external surfaces of the plastic-coated pipe in sequence without the need for multiple machines to operate separately, thus reducing equipment occupancy. At the same time, it is easy to operate and improves production efficiency, making it more practical. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural view of the present invention;

[0015] Figure 2 This is a three-dimensional sectional view of the present invention;

[0016] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a utility model Figure 2 Enlarged view of point B in the middle;

[0018] Figure 5 This is a three-dimensional view of part of the structure of this utility model.

[0019] Reference numerals: 1. Frame; 2. Lifting frame; 3. Support frame; 4. Bottom wheel; 5. Side wheel; 6. Inner spray pipe; 7. Drive plate; 8. Positioning plate; 9. Inner nozzle; 10. Hydraulic push rod; 11. Limiting rod; 12. Connecting rod; 13. Transverse block; 14. Lead screw; 15. Outer nozzle; 16. Hose; 17. T-joint; 18. Valve; 19. Outer gear ring; 20. Drive motor; 21. Drive gear; 22. Bevel gear ring; 23. Screw; 24. First bevel gear. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0021] like Figures 1-5As shown in the figure, an embodiment of the present invention provides a plastic-coated pipe spraying device, including a frame 1, a lifting frame 2 slidably mounted on the frame 1, the lifting frame 2 sliding in a vertical direction, four support frames 3 mounted on the lifting frame 2, the four support frames 3 being fixed on the lifting frame 2 and distributed in a rectangular array, bottom wheels 4 and side wheels 5 being rotatably mounted on the support frames 3, the bottom wheels 4 and side wheels 5 being distributed in a circular array with their axes all in a horizontal direction, an outer spraying component and an inner spraying pipe 6 mounted on the frame 1, the inner spraying pipe 6 including a connected fixed pipe and a... The straight pipe and fixed pipe are fixed on the frame 1. The outer spraying part is used to spray anti-corrosion coating on the outer surface of the plastic-coated pipe. The frame 1 is rotatably equipped with a drive disk 7. The axis of the drive disk 7 is in the horizontal direction. The straight pipe and the drive disk 7 are coaxially distributed. The drive disk 7 is equipped with multiple positioning plates 8 that slide synchronously in the center. The positioning plates 8 and the inner surface of the plastic-coated pipe are in contact and overlap. Synchronous center sliding means synchronously approaching or moving away from the axis of the drive disk 7. The inner spraying pipe 6 is equipped with multiple inner spray nozzles 9. The multiple inner spray nozzles 9 are all fixed on the straight pipe and evenly distributed.

[0022] In the initial state, the lifting frame 2 is at its lowest position, with multiple positioning plates 8 close to the axis of the drive disc 7. During use, the coated pipe is positioned horizontally with one end touching and overlapping the drive disc 7. This causes the multiple positioning plates 8 to slide synchronously away from the axis of the drive disc 7 until all positioning plates 8 are in contact with the inner surface of the drive disc 7, thus clamping the coated pipe internally. Then, the drive disc 7 is driven to rotate, causing the coated pipe to rotate as well. Anti-corrosion coating is sprayed onto the outer surface of the coated pipe using an external spraying component. After the anti-corrosion coating dries, the lifting frame 2 is driven to slide upwards to its highest position, with four bottom wheels 4 and four side wheels 5 in place. All of them roll and overlap with the outer surface of the plastic-coated pipe, driving multiple positioning plates 8 to slide synchronously to the axis close to the drive plate 7, releasing the inner clamp of the plastic-coated pipe, supporting the plastic-coated pipe together through four bottom wheels 4, and limiting the plastic-coated pipe together through four side wheels 5. Then, drive the bottom wheels 4 to rotate, and drive the plastic-coated pipe to rotate through friction. At the same time, the anti-corrosion coating is delivered into the fixed pipe. The anti-corrosion coating enters the straight pipe and is sprayed onto the inner surface of the plastic-coated pipe through multiple inner nozzles 9 to achieve the spraying of anti-corrosion coating on the inner surface of the plastic-coated pipe. After the coating dries, the plastic-coated pipe is removed, and the lifting frame 2 is driven to slide down to the lowest position.

[0023] In summary, this utility model integrates the functions of internal and external surface spraying, and can uniformly spray anti-corrosion coating on the internal and external surfaces of plastic-coated pipes in sequence without the need for multiple machines to operate separately, thus reducing equipment occupancy. At the same time, it is easy to operate and improves production efficiency, making it more practical.

[0024] like Figure 1As shown, a further technical solution of the present utility model is disclosed. A hydraulic push rod 10 and a plurality of limiting rods 11 are provided on the frame 1. The hydraulic push rod 10 and the limiting rods 11 are both vertical and fixed on the frame 1. The lifting frame 2 is slidably arranged on the plurality of limiting rods 11. The movable end of the hydraulic push rod 10 is connected to the lifting frame 2.

[0025] Referring to the above, in the initial state, the movable end of the hydraulic push rod 10 is retracted, and the lifting frame 2 is in the lowest position. In use, the movable end of the hydraulic push rod 10 is extended to drive the lifting frame 2 to slide upward to the highest position. Multiple limit rods 11 guide and limit the lifting frame 2 together, while improving the sliding stability. Conversely, the movable end of the hydraulic push rod 10 is retracted, and the lifting frame 2 slides downward to the lowest position.

[0026] like Figures 1-3 As shown, a further technical solution of this utility model is disclosed, wherein the surface of the bottom wheel 4 is constructed with anti-slip texture;

[0027] Referring to the above, when the bottom wheel 4 rotates, the anti-slip texture can increase the friction between it and the plastic-coated pipe, thereby making the rotation of the plastic-coated pipe more stable.

[0028] like Figure 3 As shown, a further technical solution of the present utility model is disclosed. A connecting rod 12 is rotatably arranged on the lifting frame 2. The axis of the connecting rod 12 is in the horizontal direction. Both bottom wheels 4 are connected to the connecting rod 12. A first motor in the horizontal direction is fixed on the lifting frame 2. The output shaft of the first motor is fixedly connected to the connecting rod 12.

[0029] Referring to the above, when in use, the first motor is activated, the output shaft rotates, and the connecting rod 12 rotates together. The connecting rod 12 drives the two bottom wheels 4 to rotate together. Through friction, the plastic-coated pipe rotates, which not only makes it more convenient to use, but also makes the rotation of the plastic-coated pipe more stable.

[0030] like Figure 4 As shown, the specific structure of the external spraying component of this utility model is disclosed. The external spraying component includes a transverse block 13 slidably disposed on the frame 1. The transverse block 13 slides in the horizontal direction. A lead screw 14 threaded through the transverse block 13 is rotatably disposed on the frame 1. The lead screw 14 is in the horizontal direction. A second motor in the horizontal direction is fixedly disposed on the frame 1. The output shaft of the second motor is fixedly connected to the lead screw 14. An external spray head 15 is disposed on the transverse block 13. The external spray head 15 is fixedly disposed on the transverse block 13. A flexible hose 16 is connected to the external spray head 15.

[0031] Referring to the above, in the initial state, the transverse block 13 is located in the initial position. During use, the anti-corrosion coating is delivered into the hose 16, causing the second motor to work and the output shaft to rotate forward, driving the lead screw 14 to rotate together. The transverse block 13 will slide horizontally to the limit position due to the thread action. The anti-corrosion coating is sprayed onto the outer surface of the plastic-coated pipe through the outer nozzle 15 to achieve the coating of anti-corrosion coating on the outer surface of the plastic-coated pipe. Conversely, after the coating is completed, the output shaft of the second motor is reversed, driving the lead screw 14 to rotate together. The transverse block 13 will slide horizontally to the initial position due to the thread action.

[0032] like Figures 2-4 As shown, a further technical solution of this utility model is disclosed. A three-way pipe 17 is provided on the frame 1. The three-way pipe 17 is fixed on the frame 1. Two valves 18 are provided on the three-way pipe 17. Both valves 18 are fixed on the three-way pipe 17. The inner spray pipe 6 and the hose 16 and the free end are respectively connected to one of the two ends of the three-way pipe 17.

[0033] Referring to the above, in the initial state, both valves 18 are closed. In use, the free end of the three-way pipe 17 is connected to a device that supplies anti-corrosion coating, and the anti-corrosion coating is supplied into the three-way pipe 17. The valve 18 near the inner spray pipe 6 is opened, and the anti-corrosion coating enters the inner spray pipe 6 through the three-way pipe 17, thus supplying the anti-corrosion coating into the inner spray pipe 6. Conversely, the previously opened valve 18 is closed, and the valve 18 near the hose 16 is opened, and the anti-corrosion coating enters the hose 16 through the three-way pipe 17, thus supplying the anti-corrosion coating into the hose 16. Finally, the previously opened valve 18 is closed to achieve the switching of the anti-corrosion coating flow direction, making it more convenient to use.

[0034] like Figure 5 As shown, a further technical solution of the present invention is disclosed. An external gear ring 19 is provided on the drive disk 7. The external gear ring 19 is fixed on the drive disk 7 and the two are coaxially distributed. A drive motor 20 is provided on the frame 1. The drive motor 20 is fixed on the frame 1 and the output shaft is in the horizontal direction. A drive gear 21 that meshes with the external gear ring 19 is provided on the output shaft of the drive motor 20. The drive gear 21 is fixed on the output shaft of the drive motor 20 and the two are coaxially distributed.

[0035] Referring to the above, when in use, the drive motor 20 is turned on, the output shaft rotates, and the drive gear 21 rotates together. The external gear ring 19 will rotate due to the meshing action and drive the drive disk 7 to rotate, so as to drive the drive disk 7 to rotate. The drive gear 21 and the external gear ring 19 form a speed reduction structure, which reduces the speed of the drive disk 7 and makes the rotation of the plastic-coated pipe more stable.

[0036] like Figure 5As shown, a further technical solution of this utility model is disclosed. A bevel ring 22 and a plurality of screws 23 are rotatably arranged on the drive disk 7. The bevel ring 22 and the drive disk 7 are coaxially distributed. The axis of the screws 23 is perpendicular to the axis of the drive disk 7. The plurality of screws 23 are arranged in a ring array. A plurality of positioning plates 8 are threadedly engaged with the plurality of screws 23 respectively. The positioning plates 8 and the screws 23 are equal in number. A first bevel gear 24 that meshes with the bevel ring 22 is provided on the screw 23. The first bevel gear 24 is fixed on the screw 23. A third motor is fixed on the frame 1. A second bevel gear that meshes with the bevel ring 22 is fixed on the output shaft of the third motor.

[0037] Referring to the above, during use, the output shaft of the third motor rotates forward, driving the second bevel gear to rotate as well. The bevel gear ring 22 will rotate due to meshing and drive multiple first bevel gears 24 to rotate as well. The first bevel gears 24 drive the screw 23 to rotate, and the positioning plate 8 will slide away from the axis of the drive disk 7 due to the thread action, so as to drive multiple positioning plates 8 to slide synchronously away from the axis of the drive disk 7. Conversely, the output shaft of the third motor is reversed to drive multiple positioning plates 8 to slide synchronously closer to the axis of the drive disk 7.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plastic-coated pipe spraying apparatus, characterized by, The device includes a frame (1), on which a lifting frame (2) is slidably mounted, and on which four support frames (3) are mounted. On which the support frames (3) are rotatably mounted, bottom wheels (4) and side wheels (5) are mounted. On which the frame (1) are an outer spraying component and an inner spraying pipe (6) are mounted, the outer spraying component being used to spray anti-corrosion coating onto the outer surface of the plastic-coated pipe, and on which a drive disc (7) is rotatably mounted, and on which multiple positioning plates (8) are configured to slide synchronously in the center, and on which multiple inner spray nozzles (9) are mounted on the inner spraying pipe (6).

2. The apparatus of claim 1, wherein, The frame (1) is provided with a hydraulic push rod (10) and multiple limit rods (11). The lifting frame (2) is slidably mounted on the multiple limit rods (11). The movable end of the hydraulic push rod (10) is connected to the lifting frame (2).

3. The apparatus of claim 1, wherein, The bottom wheel (4) has anti-slip texture on its surface.

4. The apparatus of claim 1 wherein, The lifting frame (2) is rotatably equipped with a connecting rod (12), wherein both bottom wheels (4) are connected to the connecting rod (12).

5. The apparatus of claim 1 wherein, The external spraying component includes a transverse block (13) slidably mounted on a frame (1), a screw (14) threaded through the transverse block (13) is rotatably mounted on the frame (1), an external nozzle (15) is mounted on the transverse block (13), and a flexible hose (16) is connected to the external nozzle (15).

6. The apparatus of claim 5, wherein, The frame (1) is provided with a three-way pipe (17), and the three-way pipe (17) is provided with two valves (18). The inner spray pipe (6) and the hose (16) and the free end are respectively connected to one end of the three-way pipe (17).

7. The apparatus of claim 1 wherein, An external gear ring (19) is provided on the drive disk (7), a drive motor (20) is provided on the frame (1), and a drive gear (21) that meshes with the external gear ring (19) is provided on the output shaft of the drive motor (20).

8. The apparatus of claim 1 wherein, The drive disk (7) is rotatably provided with a bevel ring (22) and a plurality of screws (23), and a plurality of positioning plates (8) are threadedly engaged with the plurality of screws (23) respectively. The screws (23) are provided with a first bevel gear (24) that meshes with the bevel ring (22).

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