Device and process method for coating inner wall of pipe with material

Abstract

The invention relates to the technical field of pipe coating, in particular to a pipe inner wall material coating device and process method.The pipe inner wall material coating device comprises a fixed base, a supporting frame is arranged on the fixed base, a revolution cylinder is rotationally arranged on the supporting frame, and a rotation loader used for containing a pipe is rotationally arranged in the revolution cylinder; the axis of the rotation loader is parallel to the axis of the revolution barrel, and a driving assembly is arranged on the supporting frame and used for driving the revolution barrel to revolve and driving the rotation loader to rotate at the same time. The device has the effects that the uniformity of coating the material on the inner wall of the pipe is improved, so that the thickness consistency of a coating on the inner wall of the pipe is improved, and the stability of the coating quality of the inner wall of the pipe is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe coating, and in particular to a pipe inner wall coating material device and a process method. Background Art

[0002] After existing pipes are prepared and formed, in order to improve the corrosion resistance of the pipes, reduce head loss, improve fluid dynamics performance and extend the service life of the pipes, a layer of special material is usually coated on the inner wall of the pipe to form a coating.

[0003] At present, the coating of the inner wall of the pipe is mostly carried out in the following way: the operator first fixes the pipe in place, then feeds the coating tube and the coating head installed on the coating tube into the pipe, and then uses the driving device to drive the feeding tube to rotate in a circular direction inside the pipe, while allowing the coating head to coat the material on the inner wall of the pipe to form a coating.

[0004] However, when the inner wall of the pipe is coated in the above manner, after the coating head coats the material on the inner wall of the pipe, the material will flow downward on the inner wall of the pipe due to the effect of gravity, which may easily lead to uneven distribution of the material on the inner wall of the pipe, and further easily lead to inconsistent coating thickness at different positions on the inner wall of the pipe, resulting in unstable coating quality of the inner wall of the pipe. Summary of the invention

[0005] In order to improve the uniformity of coating materials on the inner wall of the pipe, thereby improving the consistency of the coating thickness on the inner wall of the pipe, and further improving the stability of the coating quality of the inner wall of the pipe, the present application provides a device and a process method for coating materials on the inner wall of the pipe.

[0006] The present application provides a device and a process for coating the inner wall of a pipe, which adopts the following technical solutions: A device for coating material on the inner wall of a pipe comprises a fixed base, a support frame is arranged on the fixed base, a revolving cylinder is rotatably arranged on the support frame, a rotating carrier for placing the pipe is rotatably arranged in the revolving cylinder, and the axis of the rotating carrier is parallel to the axis of the revolving cylinder, and a driving assembly is arranged on the support frame, and the driving assembly is used to simultaneously drive the revolving cylinder to revolve and drive the rotating carrier to rotate.

[0007] By adopting the above technical scheme, the driving component helps to drive the revolving cylinder to rotate, and the rotating cylinder helps to drive the rotating carrier to revolve along the axis of the revolving cylinder while rotating. The driving component also helps to drive the rotating carrier to rotate while revolving, thereby helping to make the pipe rotate along the axis of the rotating carrier while revolving along the axis of the revolving cylinder, thereby helping to make the material inside the pipe be coated on the inner wall of the pipe to form a coating under the action of double centrifugal force, helping to improve the uniformity of coating the material on the inner wall of the pipe, thereby helping to improve the consistency of the coating thickness on the inner wall of the pipe, and thereby helping to improve the stability of the coating quality of the inner wall of the pipe.

[0008] In a specific possible implementation scheme, the driving assembly includes a revolving drive motor, a mounting plate and a rotating drive motor, the revolving drive motor is arranged on the supporting frame, and the output shaft of the revolving drive motor is connected to the revolving cylinder, the mounting plate is fixedly sleeved on the output shaft of the revolving drive motor, the rotating drive motor is arranged on the mounting plate, and the output shaft of the rotating drive motor is connected to the rotating carrier.

[0009] By adopting the above technical scheme, the use of the revolving drive motor helps to drive the revolving cylinder to rotate, and the rotation of the revolving cylinder helps to drive the rotating carrier to revolve along the axis of the revolving cylinder. At the same time, the use of the revolving drive motor also helps to drive the mounting plate and the rotating drive motor to rotate along the axis of the revolving cylinder, thereby helping to keep the relative positions of the rotating drive motor and the rotating carrier unchanged, and helps to use the rotating drive motor to drive the rotating carrier to rotate while revolving, thereby helping to make the pipe rotate along the axis of the rotating carrier while revolving along the axis of the revolving cylinder, thereby helping to make the material inside the pipe be coated on the inner wall of the pipe under the action of double centrifugal force to form a coating, helping to improve the uniformity of coating the material on the inner wall of the pipe, thereby helping to improve the consistency of the coating thickness on the inner wall of the pipe, and thereby helping to improve the stability of the coating quality of the inner wall of the pipe.

[0010] In a specific possible implementation scheme, the interior of the self-rotating carrier is hollow, a feed port is provided at one end of the self-rotating carrier away from the driving assembly, a sealing cover is provided in the feed port, and a tightening and positioning assembly for elastically tightening the pipe is provided inside the self-rotating carrier.

[0011] By adopting the above-mentioned technical solution, when placing the pipe inside the rotating carrier, the cooperation of the sealing cover and the tightening positioning assembly helps to elastically tighten the pipe placed inside the rotating carrier, thereby helping to position and fix the position of the pipe placed inside the rotating carrier, and further helping to ensure the stability of the relative position between the pipe and the rotating carrier, making it convenient for the rotating carrier to drive the pipe to revolve and rotate.

[0012] In a specific feasible implementation scheme, the tightening and positioning assembly includes a fixed column, an abutment disc seat and a supporting spring, the fixed column is fixedly arranged on the inner wall of the rotating carrier, and the fixed column is coaxially arranged with the rotating carrier, the abutment disc seat is slidably sleeved on the fixed column, the abutment disc seat is provided with a slider, the fixed column is provided with a slide groove, the slide groove is arranged along the axial direction of the fixed column, the slider is slidably arranged in the slide groove, the supporting spring is sleeved on the fixed column, and one end of the supporting spring is connected to the inner wall of the rotating carrier, and the other end is connected to the abutment disc seat, and the fixed column and the abutment disc seat are jointly provided with an internal supporting positioning assembly for internally supporting and tightening the pipe.

[0013] By adopting the above technical solution, after placing the pipe inside the rotating carrier, the cover is used to press the pipe tightly, which helps to make the pipe abut against the abutment disc seat and drive the abutment disc seat to press the top support spring, so that the top support spring contracts. The joint action of the cover, the abutment disc seat and the top support spring helps to elastically press the pipe, thereby helping to position and fix the position of the pipe placed in the rotating carrier, and further helps to ensure the stability of the relative position between the pipe and the rotating carrier. The use of the internal support positioning assembly helps to internally support and position the pipe, thereby helping to further ensure the stability of the relative position between the pipe and the rotating carrier. The sliding of the slider in the slide groove helps to guide the moving trajectory of the abutment disc seat, and at the same time helps to prevent the abutment disc seat from rotating on the fixed column, thereby helping to improve the abutment disc seat The tightening effect of the pipe.

[0014] In a specific feasible implementation scheme, the internal support positioning assembly includes a special-shaped connecting rod, a movable wheel and a clamping block, one end of the fixed column is provided with a slot, the special-shaped connecting rod is hingedly arranged in the slot and both ends of the special-shaped connecting rod are located outside the slot, a movable slot is provided on the abutment disc seat, the movable wheel is hingedly arranged at one end of the special-shaped connecting rod and is movably clamped in the movable slot, and the clamping block is arranged at the other end of the special-shaped connecting rod and is used to internally support the pipe.

[0015] By adopting the above technical solution, when the pipe is pressed against the abutment disc seat and drives the abutment disc seat to move, the movement of the abutment disc seat helps to drive the movable wheel to move in the movable slot, thereby helping to drive the special-shaped connecting rod to rotate, and then helping to drive the pressing block to internally support and press the end of the pipe, which helps to further position the pipe and help to further ensure the stability of the relative position between the pipe and the rotating carrier.

[0016] A process for coating a pipe inner wall with a material, based on the above-mentioned pipe inner wall coating material device, comprises the following steps: Step 1: Add a certain amount of material into the tube, and then place the tube horizontally into the self-rotating carrier; Step 2: Using the driving assembly to drive the revolving cylinder to rotate, thereby driving the self-rotating carrier and the pipe to revolve, and using the driving assembly to drive the self-rotating carrier and the pipe to rotate while revolving, so that the material inside the pipe is coated on the inner wall of the pipe under the action of centrifugal force to form a coating; Step 3: Stop the driving assembly and take out the coated pipe from the inside of the self-rotating carrier.

[0017] By adopting the above technical solution, the driving component is used to help drive the rotating carrier to rotate while revolving, thereby helping the pipe to rotate along the axis of the rotating carrier while revolving along the axis of the revolving cylinder, thereby helping the material inside the pipe to be coated on the inner wall of the pipe under the action of double centrifugal force to form a coating, helping to improve the uniformity of coating the material on the inner wall of the pipe, thereby helping to improve the consistency of the coating thickness on the inner wall of the pipe, and thereby helping to improve the stability of the coating quality of the inner wall of the pipe.

[0018] In a specific possible implementation scheme, in step one, when placing the tube inside the self-rotating carrier, the tube is tightly positioned using a tightening positioning assembly in cooperation with a sealing cover, and the tube is simultaneously internally supported and tightened using an internal support positioning assembly, thereby fixing the tube inside the self-rotating carrier.

[0019] By adopting the above technical solution, the cooperation of the sealing cover and the tightening positioning assembly helps to elastically tighten the pipe placed inside the rotating carrier, thereby helping to position and fix the position of the pipe placed inside the rotating carrier, and further helping to ensure the stability of the relative position between the pipe and the rotating carrier, making it convenient for the rotating carrier to drive the pipe to rotate while revolving.

[0020] In a specific possible implementation scheme, in step three, when taking the tube out from the interior of the self-rotating carrier, the positioning assembly is used to help eject the tube from the interior of the self-rotating carrier, thereby facilitating the removal of the tube from the interior of the self-rotating carrier.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, the driving assembly helps to drive the rotating carrier to rotate while revolving, thereby helping the pipe to rotate along the axis of the rotating carrier while revolving along the axis of the revolving cylinder, thereby helping the material inside the pipe to be coated on the inner wall of the pipe to form a coating under the action of double centrifugal force, helping to improve the uniformity of coating the material on the inner wall of the pipe, thereby helping to improve the consistency of the coating thickness on the inner wall of the pipe, and further helping to improve the stability of the coating quality of the inner wall of the pipe.

[0022] 2. In the present application, a sealing cover and a tightening positioning component are arranged. The sealing cover cooperates with the tightening positioning component to help elastically tighten the pipe placed inside the rotating carrier, thereby helping to position and fix the position of the pipe placed inside the rotating carrier, and further helping to ensure the stability of the relative position between the pipe and the rotating carrier, and helping to ensure that the rotating carrier drives the pipe to rotate while revolving; the tightening positioning component can also help to eject the pipe from the inside of the rotating carrier, thereby helping to improve the convenience of removing the pipe from the inside of the rotating carrier.

[0023] 3. The present application provides an internal support positioning assembly, which helps to internally support and tightly position the pipe, thereby helping to further ensure the stability of the relative position between the pipe and the rotating carrier, and helping to further ensure that the rotating carrier drives the pipe to rotate while revolving. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] Figure 2 It is a cross-sectional view showing the specific internal structure of the drive assembly and the revolving cylinder.

[0026] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0027] Figure 4 It is a cross-sectional view showing the specific internal structure of the rotating carrier.

[0028] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0029] Figure 6 yes Figure 4 Enlarged view of point C in the middle.

[0030] Figure 7It is a partial structural cross-sectional view that reflects the specific structure of the tight positioning component.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. Fixed base; 2. Support frame; 3. Revolution cylinder; 4. Rotation carrier; 5. Drive assembly; 51. Revolution drive motor; 52. Mounting plate; 53. Rotation drive motor; 6. Feed port; 7. Internal thread; 8. Sealing cover; 9. Butt-jointing positioning assembly; 91. Fixed column; 92. Butt-jointing disc seat; 93. Support spring; 10. Slider; 11. Slide groove; 12. Internal support positioning assembly; 121. Special-shaped connecting rod; 122. Movable wheel; 123. Butt-jointing block; 13. Slot; 14. Movable slot; 15. Butt-jointing gasket; 16. Anti-slip ring; 17. Ring; 18. Connecting block; 19. Ring groove; 20. Ball bearing. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings.

[0033] The present application discloses a device for coating the inner wall of a pipe with a material, referring to Figure 1 and Figure 2 , comprising a fixed base 1, a support frame 2 is fixedly mounted on the fixed base 1, a revolving cylinder 3 is rotatably mounted on the support frame 2, and the axis of the revolving cylinder 3 is arranged horizontally. A plurality of hollow self-rotating carriers 4 are rotatably mounted in the revolving cylinder 3, and the plurality of self-rotating carriers 4 are arranged in a circular array with the axis of the revolving cylinder 3 as the center line, and the axis of each self-rotating carrier 4 is parallel to the axis of the revolving cylinder 3.

[0034] Reference Figure 2 A driving assembly 5 is arranged on the support frame 2, and the driving assembly 5 includes a revolution driving motor 51, a mounting plate 52 and a rotation driving motor 53. In the present embodiment, a plurality of rotation driving motors 53 are arranged and the number is the same as the number of the rotation carrier 4. The revolution driving motor 51 is fixedly mounted on the side wall of the support frame 2 and the output shaft is fixedly connected to the revolution cylinder 3. The mounting plate 52 is fixedly sleeved on the output shaft of the revolution driving motor 51. A plurality of rotation driving motors 53 are fixedly mounted on the mounting plate 52 and the output shaft of each rotation driving motor 53 is fixedly connected to a rotation carrier 4.

[0035] Reference Figure 2 and Figure 3 A collar 17 is fixedly mounted on the support frame 2, and the collar 17 is located at the outer ring of the revolving cylinder 3. An annular groove 19 is provided on the circumferential inner wall of the collar 17. A plurality of connecting blocks 18 are fixedly mounted on the circumferential outer wall of the revolving cylinder 3. Each connecting block 18 is located inside the annular groove 19. A plurality of balls 20 are rotatably mounted on each connecting block 18, and the balls 20 roll and abut against the groove wall of the annular groove 19.

[0036] Reference Figure 4 and Figure 5 Each rotating carrier 4 has a feed port 6 at one end away from the rotating drive motor 53, and an internal thread 7 is integrally formed on the circumferential inner wall of the feed port 6. The internal thread 7 of the feed port 6 is connected to a cover 8, and a rubber abutment gasket 15 is fixed on the side of the cover 8 facing the inside of the rotating carrier 4.

[0037] Reference Figure 6 and Figure 7 A tight positioning assembly 9 is provided inside the rotating carrier 4, and the tight positioning assembly 9 includes a fixed column 91, an abutting disc seat 92 and a supporting spring 93. The fixed column 91 is fixedly installed on an inner wall of one side of the rotating carrier 4, and the fixed column 91 is coaxially arranged with the rotating carrier 4; the abutting disc seat 92 is slidably sleeved on the fixed column 91, and a slider 10 is fixed on the circumferential inner wall of the abutting disc seat 92. A sliding groove 11 is opened on the fixed column 91 along its own axial direction, and the slider 10 is slidably engaged in the sliding groove 11; the supporting spring 93 is fixedly sleeved on the circumferential periphery of the fixed column 91, and the supporting spring 93 is located on the side of the abutting disc seat 92 away from the feed port 6, and one end of the supporting spring 93 is fixedly connected to the inner wall of the rotating carrier 4, and the other end is fixedly connected to the abutting disc seat 92.

[0038] Reference Figure 6 Two groups of inner support positioning components 12 are commonly provided on the fixed column 91 and the abutment disc seat 92, and the two groups of inner support positioning components 12 are symmetrically arranged along the axis of the fixed column 91. Each group of inner support positioning components 12 includes a special-shaped connecting rod 121, a movable wheel 122 and a tightening block 123. A slot 13 is provided at the end of the fixed column 91. In this embodiment, the special-shaped connecting rod 121 is L-shaped, and the right angle of the special-shaped connecting rod 121 is hinged in the slot 13 and both ends of the special-shaped connecting rod 121 are located outside the slot 13. A movable card slot 14 is provided on the abutment disc seat 92, and the movable wheel 122 is hingedly installed at one end of the special-shaped connecting rod 121 and is rolled and clamped in the movable card slot 14. The tightening block 123 is fixedly installed at the other end of the special-shaped connecting rod 121, and a rubber anti-slip ring 16 is fixedly sleeved on the circumferential outer wall of the tightening block 123.

[0039] Reference Figure 4 and Figure 6When coating the inner wall of the pipe, a certain amount of material is added to the inside of the pipe, and then the pipe with the material added is placed horizontally into the rotating carrier 4 from the feed port 6, and the cover 8 is screwed into the feed port 6, so that the cover 8 can press the pipe tightly while moving in the feed port 6, so that the pipe abuts against the abutment disc seat 92 and drives the abutment disc seat 92 to slide on the fixed column 91, and the abutment disc seat 92 compresses the support spring 93 while sliding, so that the support spring 93 gradually changes to a contracted state, and the joint action of the cover 8 and the abutment disc seat 92 helps to elastically press the pipe, thereby helping to position and fix the position of the pipe placed in the rotating carrier 4, and then helping to ensure the stability of the relative position between the pipe and the rotating carrier 4.

[0040] Reference Figure 4 and Figure 5 When the cover 8 is pressed against the pipe, the rubber abutment gasket 15 helps to increase the friction between the cover 8 and the pipe, thereby helping to prevent the pipe from rotating inside the rotating carrier 4, further ensuring the stability of the relative position between the pipe and the rotating carrier 4.

[0041] Reference Figure 7 When the abutment disc seat 92 slides on the fixed column 91, the slider 10 slides in the slide groove 11, which helps to guide the movement trajectory of the abutment disc seat 92. At the same time, the slider 10 is clamped in the slide groove 11 to help prevent the abutment disc seat 92 from rotating on the fixed column 91, which helps to improve the tightening effect of the abutment disc seat 92 on the pipe.

[0042] Reference Figure 6 When the contact plate seat 92 slides on the fixed column 91, the movable wheel 122 rolls in the movable slot 14, thereby driving the special-shaped connecting rod 121 to rotate, and then driving the tightening block 123 to tighten the end of the pipe, which helps to further position the pipe and further ensure the stability of the relative position between the pipe and the rotating carrier 4. When the tightening block 123 and the end of the pipe are tightened, the anti-skid ring 16 made of rubber material helps to increase the friction between the tightening block 123 and the pipe, thereby helping to enhance the tightening and positioning effect of the tightening block 123 on the pipe, and further ensure the stability of the relative position between the pipe and the rotating carrier 4.

[0043] Reference Figure 2When the pipe is placed, the operator starts the revolution drive motor 51 to drive the revolution cylinder 3 to rotate, and at the same time drives the mounting plate 52 and multiple rotation drive motors 53 to rotate along the axis of the revolution cylinder 3, so that the relative position of the rotation drive motor 53 and the rotation carrier 4 remains unchanged; the operator drives the rotation drive motor 53 at the same time to drive the rotation carrier 4 to rotate while revolving, so that the pipe revolves along the axis of the revolution cylinder 3 and rotates along the axis of the rotation carrier 4 at the same time, and then the material inside the pipe is coated on the inner wall of the pipe under the action of double centrifugal force to form a coating, which helps to improve the uniformity of coating the material on the inner wall of the pipe, thereby helping to improve the consistency of the coating thickness on the inner wall of the pipe, and then helping to improve the stability of the coating quality of the inner wall of the pipe.

[0044] Reference Figure 2 and Figure 3 When the revolving cylinder 3 rotates on the support frame 2, the connecting block 18 rotates inside the annular groove 19, thereby helping to improve the stability of the revolving cylinder 3 during the rotation process. The ball 20 helps to reduce the friction between the connecting block 18 and the collar 17, thereby helping to improve the smoothness of the rotation of the revolving cylinder 3 on the support frame 2.

[0045] The present application also discloses a process for coating the inner wall of a pipe with a material based on the above device, comprising the following steps: Step 1: Add a certain amount of material into the tube, then place the tube horizontally into the rotating carrier 4 from the feed port 6 after the material is added, and screw the cover 8 into the feed port 6 so that the cover 8 can press the tube tightly while moving in the feed port 6, so that the tube abuts against the abutment disc seat 92 and drives the abutment disc seat 92 to slide on the fixed column 91, and the abutment disc seat 92 compresses the support spring 93 while sliding, so that the support spring 93 gradually changes into a contracted state, and the joint action of the cover 8 and the abutment disc seat 92 helps to elastically press the tube, thereby helping to position and fix the position of the tube in the rotating carrier 4, and further helping to ensure the stability of the relative position between the tube and the rotating carrier 4.

[0046] When the contact plate seat 92 slides on the fixed column 91, the movable wheel 122 rolls in the movable slot 14, thereby driving the special-shaped connecting rod 121 to rotate, and then driving the tightening block 123 to tighten the end of the pipe, which helps to further position the pipe and further ensure the stability of the relative position between the pipe and the self-rotating carrier 4. When the tightening block 123 and the end of the pipe are tightened, the anti-skid ring 16 made of rubber material helps to increase the friction between the tightening block 123 and the pipe, thereby helping to enhance the tightening and positioning effect of the tightening block 123 on the pipe, and further ensures the stability of the relative position between the pipe and the self-rotating carrier 4.

[0047] Step 2: When the pipe is placed, the operator starts the revolution drive motor 51 to drive the revolution cylinder 3 to rotate, and at the same time drives the mounting plate 52 and multiple rotation drive motors 53 to rotate along the axis of the revolution cylinder 3, so that the relative position of the rotation drive motor 53 and the rotation carrier 4 remains unchanged; the operator drives the rotation drive motor 53 at the same time to drive the rotation carrier 4 to rotate while revolving, so that the pipe revolves along the axis of the revolution cylinder 3 and rotates along the axis of the rotation carrier 4 at the same time, and then the material inside the pipe is coated on the inner wall of the pipe under the action of double centrifugal force to form a coating, which helps to improve the uniformity of coating the material on the inner wall of the pipe, thereby helping to improve the consistency of the coating thickness on the inner wall of the pipe, and then helping to improve the stability of the coating quality of the inner wall of the pipe.

[0048] Step 3: After the material coating is completed, the operator turns off the revolution drive motor 51 and the rotation drive motor 53 to stop the rotation of the rotating carrier 4. The operator twists the cover 8 out of the feed port 6, and under the elastic force of the supporting spring 93, the abutting disc seat 92 ejects the pipe from the inside of the rotating carrier 4, thereby facilitating the convenience of taking the pipe out of the inside of the rotating carrier 4.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for coating the inner wall of a pipe, characterized in that: The invention comprises a fixed base (1), a support frame (2) is arranged on the fixed base (1), a revolving cylinder (3) is rotatably arranged on the support frame (2), a rotating carrier (4) for placing pipes is rotatably arranged inside the revolving cylinder (3), and the axis of the rotating carrier (4) is parallel to the axis of the revolving cylinder (3), and a driving assembly (5) is arranged on the support frame (2), and the driving assembly (5) is used to simultaneously drive the revolving cylinder (3) to revolve and drive the rotating carrier (4) to rotate.

2. A device for coating inner wall of a pipe according to claim 1, characterized in that: The driving assembly (5) comprises a revolution driving motor (51), a mounting plate (52) and a rotation driving motor (53); the revolution driving motor (51) is arranged on the support frame (2), and the output shaft of the revolution driving motor (51) is connected to the revolution cylinder (3); the mounting plate (52) is fixedly sleeved on the output shaft of the revolution driving motor (51); the rotation driving motor (53) is arranged on the mounting plate (52), and the output shaft of the rotation driving motor (53) is connected to the rotation carrier (4).

3. A device for coating inner wall of a pipe according to claim 1, characterized in that: The interior of the self-rotating carrier (4) is hollow, and a feed port (6) is provided at one end of the self-rotating carrier (4) away from the driving assembly (5), a sealing cover (8) is provided in the feed port (6), and a tightening positioning assembly (9) for elastically tightening the pipe is provided inside the self-rotating carrier (4).

4. A device for coating inner wall of a pipe according to claim 3, characterized in that: The abutting positioning assembly (9) comprises a fixed column (91), an abutting disc seat (92) and a supporting spring (93); the fixed column (91) is fixedly arranged on the inner wall of the rotating carrier (4), and the fixed column (91) is coaxially arranged with the rotating carrier (4); the abutting disc seat (92) is slidably sleeved on the fixed column (91); a sliding block (10) is arranged on the abutting disc seat (92); a sliding groove (11) is arranged on the fixed column (91); The groove (11) is arranged along the axial direction of the fixed column (91), the sliding block (10) is slidably arranged in the sliding groove (11), the supporting spring (93) is sleeved on the fixed column (91), and one end of the supporting spring (93) is connected to the inner wall of the rotating carrier (4), and the other end is connected to the abutting disc seat (92), and the fixed column (91) and the abutting disc seat (92) are jointly provided with an internal supporting positioning component (12) for internally supporting and tightening the pipe.

5. A device for coating inner wall of a pipe according to claim 4, characterized in that: The inner support positioning assembly (12) comprises a special-shaped connecting rod (121), a movable wheel (122) and a clamping block (123); one end of the fixed column (91) is provided with a slot (13); the special-shaped connecting rod (121) is hingedly arranged in the slot (13) and both ends of the special-shaped connecting rod (121) are located outside the slot (13); a movable clamping groove (14) is provided on the abutment disc seat (92); the movable wheel (122) is hingedly arranged at one end of the special-shaped connecting rod (121) and is movably clamped in the movable clamping groove (14); the clamping block (123) is arranged at the other end of the special-shaped connecting rod (121) and is used for internal support of the pipe.

6. A process for coating the inner wall of a pipe, based on the device for coating the inner wall of a pipe according to claims 1-5, characterized in that: The process includes the following steps: Step 1: Add a certain amount of material into the tube, and after adding, place the tube horizontally into the self-rotating carrier (4); Step 2: Using the driving assembly (5) to drive the revolving cylinder (3) to rotate, thereby driving the self-rotating carrier (4) and the pipe to revolve, and at the same time using the driving assembly (5) to drive the self-rotating carrier (4) and the pipe to rotate while revolving, so that the material inside the pipe is coated on the inner wall of the pipe under the action of centrifugal force to form a coating; Step 3: Stop the driving assembly (5) and take out the coated pipe from the inside of the self-rotating carrier (4).

7. A process for coating the inner wall of a pipe according to claim 6, characterized in that: In step one, when placing the pipe inside the self-rotating carrier (4), the pipe is tightly positioned using the pressing and positioning assembly (9) in cooperation with the sealing cover (8), and the pipe is simultaneously internally supported and pressed using the internal support positioning assembly (12), thereby fixing the pipe inside the self-rotating carrier (4).

8. The process for coating the inner wall of a pipe according to claim 6, characterized in that: In step three, when taking the pipe out from the interior of the self-rotating carrier (4), the positioning assembly (9) is used to help eject the pipe from the interior of the self-rotating carrier (4), thereby facilitating taking the pipe out from the interior of the self-rotating carrier (4).

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