Anticorrosive paint coating device

Abstract

The invention discloses an anticorrosive paint coating device which comprises a positioning sleeve, a plurality of center positioning mechanisms, a plurality of constant-speed transmission mechanisms and a surrounding rotary spraying mechanism, the multiple center positioning mechanisms are distributed in the circumferential direction of the positioning sleeve, the constant-speed transmission mechanisms are arranged on the positioning sleeve, and the surrounding rotary spraying mechanism is arranged on the positioning sleeve. And the positioning sleeve can rotate along the circumferential direction relative to the positioning sleeve. During spraying, a pipeline penetrates through the multiple center positioning mechanisms, the pipeline is positioned through the positioning sleeve and the multiple center positioning mechanisms, then the constant-speed transmission mechanism and the surrounding rotating spraying mechanism are started to spray anticorrosive paint on the periphery of the pipeline, and the constant-speed transmission mechanism can make the device move linearly at a constant speed in the axial direction relative to the pipeline; and the surrounding rotary spraying mechanism can rotate at a constant speed in the circumferential direction relative to the pipeline, so that the anticorrosive outer layer of the pipeline can be conveniently, quickly and uniformly coated, the coating efficiency is improved, the outer layer of the pipeline can be completely coated, coating missing points are avoided, and the quality of the anticorrosive outer layer of the pipeline is improved.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering, and in particular to an anti-corrosion coating device. Background Art

[0002] In marine engineering, anti-corrosion coating of platform module pipelines is crucial to cope with the corrosion risks caused by high salinity, high humidity and strong ultraviolet rays in the marine environment. Selecting the right coating material is the key to achieving long-term and effective protection. Epoxy resin coatings have been widely used in marine environments due to their excellent anti-corrosion properties and adhesion, and can effectively resist the erosion of salt spray and moisture. In the prior art, high-pressure airless spray equipment is generally used to coat the anti-corrosion outer layer of the pipeline, but this type of equipment cannot completely coat the outer layer of the pipeline, so it is necessary to cooperate with manual repair methods for coating, which is inefficient, and there are still many missing points in manual spraying, and the outer layer of the pipeline cannot be completely coated, which reduces the quality of the anti-corrosion outer layer of the pipeline. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide an anti-corrosion coating coating device, which can conveniently and quickly coat the anti-corrosion outer layer of the pipeline and improve the quality of the anti-corrosion outer layer of the pipeline.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: an anti-corrosion paint coating device, comprising a positioning sleeve, a center positioning mechanism, a uniform speed transmission mechanism and a circumferential rotating spraying mechanism. The center positioning mechanism is distributed in multiple numbers along the circumference of the positioning sleeve, and is used to position the outer periphery of the connecting pipe. The uniform speed transmission mechanism is arranged on the positioning sleeve, and is used to make the anti-corrosion paint coating device move at a uniform speed axially relative to the pipe. The circumferential rotating spraying mechanism is arranged on the positioning sleeve and can rotate circumferentially relative to the positioning sleeve, and is used to circumferentially spray the anti-corrosion paint on the outer periphery of the pipe.

[0005] Compared with the prior art, the beneficial effect of the present invention is that during spraying, the pipeline is inserted between multiple center positioning mechanisms, the pipeline is positioned by the positioning sleeve and multiple center positioning mechanisms, and then the uniform speed transmission mechanism and the circumferential rotating spraying mechanism are started to spray the anti-corrosion coating on the outer periphery of the pipeline. The uniform speed transmission mechanism can make the device move linearly at a uniform speed in the axial direction relative to the pipeline, and the circumferential rotating spraying mechanism can rotate at a uniform speed in the circumferential direction relative to the pipeline, so that the anti-corrosion outer layer of the pipeline can be coated conveniently, quickly and evenly. While improving the coating efficiency, it can ensure that the outer layer of the pipeline is completely coated, avoid missing coating points, and improve the quality of the anti-corrosion outer layer of the pipeline.

[0006] In the above-mentioned anti-corrosion paint coating device, the center positioning mechanism includes a guide frame and a support assembly. The guide frames of the multiple center positioning mechanisms are distributed along the circumference of the positioning sleeve and connected to the outer periphery of the positioning sleeve. The support assembly is connected to the guide frame and extends to the interior of the positioning sleeve to position the outer periphery of the support pipe.

[0007] In the above-mentioned anti-corrosion paint coating device, the center positioning mechanism also includes a center screw, which is connected to the guide frame; the support assembly includes a slider, a stabilizing rod, a first elastic member, an extension rod, a wheel frame and a center positioning guide wheel, the slider is movably connected to the center screw, the guide frame is provided with a guide groove, the stabilizing rod is fixedly connected to the slider and can be movably inserted into the guide groove, the first elastic member is sleeved on the center screw, and the two ends of the first elastic member respectively abut the slider and the guide frame, the two ends of the extension rod are respectively rotatably connected to the slider and the wheel frame, the center positioning guide wheel is rotatably connected to the wheel frame, and the circumference of the center positioning guide wheel can abut against the outer circumference of the pipe.

[0008] In the above-mentioned anti-corrosion paint coating device, the slider, the stabilizer rod, the first elastic member and the extension rod are symmetrically distributed along the two ends of the central screw rod, and the first end of the extension rod is rotatably connected to the slider, and the second end is rotatably connected to the wheel frame, and the distance between the first ends of the two extension rods is greater than the distance between the second ends of the two extension rods, and there are two center positioning guide wheels symmetrically distributed at both ends of the wheel frame.

[0009] In the above-mentioned anti-corrosion paint coating device, there are two groups of uniform speed transmission mechanisms distributed on both sides of the positioning sleeve, each group of the uniform speed transmission mechanism includes a transmission frame, a positioning frame and a first transmission assembly, the transmission frame is fixedly connected to the positioning sleeve, the positioning frame is installed on the transmission frame, and the first transmission assembly is installed on the positioning frame, which is used to make the anti-corrosion paint coating device move at a uniform speed axially relative to the pipeline.

[0010] In the above-mentioned anti-corrosion paint coating device, the first transmission assembly includes a first driving member, a sliding seat, a transmission rod, a friction transmission wheel and a second elastic member. The first driving member can be slidably connected to the positioning frame, the transmission frame is provided with an avoidance groove, the sliding seat can be slidably connected to the avoidance groove, one end of the transmission rod is fixedly connected to the output end of the first driving member, and the other end is rotatably connected to the sliding seat, the friction transmission wheel is fixedly connected to the transmission rod, the second elastic member is installed in the avoidance groove, and the two ends of the second elastic member respectively abut the transmission frame and the sliding seat.

[0011] The above-mentioned anti-corrosion paint coating device, the circumferential rotating spraying mechanism includes a positioning ring seat, a sealing bearing, an annular shell and a spraying assembly, the positioning ring seat is fixedly connected to the positioning sleeve, the sealing bearing is provided with two and is sleeved on the outer periphery of the positioning ring seat at intervals, the annular shell is sleeved on the outer periphery of the sealing bearing, and a sealed chamber is formed between the positioning ring seat, the annular shell and the two sealing bearings; the spraying assembly includes a storage tank, a conveying pipeline, a booster pump, a shunt pipe, a spraying pipeline and a nozzle, the storage tank is fixedly connected to the positioning sleeve for storing anti-corrosion paint, the two ends of the conveying pipeline are respectively connected to the storage tank and the sealed chamber, the booster pump is connected to the conveying pipeline, and is used to convey the anti-corrosion paint in the storage tank to the sealed chamber through the conveying pipeline, there are multiple shunt pipes distributed along the circumference of the positioning ring seat, and the two ends of the shunt pipe are respectively connected to the sealed chamber and the spraying pipeline, and the nozzle is installed at the outlet of the spraying pipeline.

[0012] In the above-mentioned anti-corrosion paint coating device, the axis of the spray pipe is parallel to the axis of the positioning sleeve, and a plurality of spray heads are distributed along the axial direction of the spray pipe.

[0013] The above-mentioned anti-corrosion paint coating device, the spraying mechanism also includes a second transmission assembly, the second transmission assembly includes a first gear, a second driving member, a transmission shaft and a second gear, the first gear is an annular gear fixedly arranged on the outer periphery of the annular shell, the two ends of the transmission shaft are respectively fixedly connected to the output end of the second driving member and the second gear, the second gear is meshingly connected to the first gear, when the second driving member drives the second gear to rotate, the second gear can drive the first gear to rotate, thereby making the annular shell, the diverter pipe, the spray pipe and the nozzle rotate around the positioning sleeve together.

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing the coordination relationship between the anti-corrosion coating coating device and the pipeline according to an embodiment of the present invention;

[0016] Figure 2 It is a schematic diagram of the overall structure of the anti-corrosion coating coating device according to an embodiment of the present invention;

[0017] Figure 3 A diagram showing the matching relationship between the positioning sleeve and the center positioning mechanism according to an embodiment of the present invention;

[0018] Figure 4 A schematic diagram of the structure of a center positioning mechanism according to an embodiment of the present invention;

[0019] Figure 5 It is a structural schematic diagram of a uniform speed transmission mechanism according to an embodiment of the present invention;

[0020] Figure 6 A schematic diagram of the internal structure of a uniform speed transmission mechanism according to an embodiment of the present invention;

[0021] Figure 7 It is a structural schematic diagram of a surrounding rotary spraying mechanism according to an embodiment of the present invention;

[0022] Figure 8 Schematic diagram of the internal structure of the rotary spraying mechanism according to an embodiment of the present invention.

[0023] Explanation of the accompanying drawings: 1-positioning sleeve, 2-center positioning mechanism, 3-uniform speed transmission mechanism, 4-surrounding rotation spraying mechanism, 5-guide frame, 6-guide groove, 7-center screw, 8-slider, 9-stabilizing rod, 10-first elastic member, 11-extension rod, 12-wheel frame, 13-center positioning guide wheel, 14-transmission frame, 15-avoidance groove, 16-positioning frame, 17-first driving member, 18-sliding seat, 19-transmission rod, 20-friction transmission wheel, 21-second elastic member, 22-positioning ring seat, 23-sealed bearing, 24-annular casing, 25-storage tank, 26-delivery pipeline, 27-boosting pump, 28-diverter pipe, 29-spraying pipeline, 30-spray head, 31-first gear, 32-second driving member, 33-transmission shaft, 34 second gear. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below. Figure 1 and Figure 2 An embodiment of the present invention provides an anti-corrosion paint coating device, including a positioning sleeve 1, a center positioning mechanism 2, a uniform speed transmission mechanism 3 and a circumferential rotation spraying mechanism 4. The center positioning mechanism 2 is distributed along the circumference of the positioning sleeve 1, and is used to position the outer periphery of the connecting pipe. The uniform speed transmission mechanism 3 is arranged on the positioning sleeve 1, and is used to make the anti-corrosion paint coating device move at a uniform speed along the axial direction relative to the pipe. The circumferential rotation spraying mechanism 4 is arranged on the positioning sleeve 1, and can rotate circumferentially relative to the positioning sleeve 1, and is used to circumferentially rotate and spray the anti-corrosion paint on the outer periphery of the pipe. During spraying, the pipeline is passed through multiple center positioning mechanisms 2, and the pipeline is positioned by the positioning sleeve 1 and the multiple center positioning mechanisms 2, and then the uniform speed transmission mechanism 3 and the circumferential rotating spraying mechanism 4 are started to spray the anti-corrosion coating on the outer periphery of the pipeline. The uniform speed transmission mechanism 3 can make the device move linearly at a uniform speed in the axial direction relative to the pipeline, and the circumferential rotating spraying mechanism 4 can rotate at a uniform speed in the circumferential direction relative to the pipeline, so that the anti-corrosion outer layer of the pipeline can be coated conveniently, quickly and evenly. While improving the coating efficiency, it can ensure that the outer layer of the pipeline is completely coated, avoid missing coating points, and improve the quality of the anti-corrosion outer layer of the pipeline.

[0025] Further, refer to Figure 3 and Figure 4 The center positioning mechanism 2 includes a guide frame 5 and a support assembly. The guide frames 5 of multiple center positioning mechanisms 2 are distributed along the circumference of the positioning sleeve 1 and connected to the outer periphery of the positioning sleeve 1. The support assembly is connected to the guide frame 5 and extends to the interior of the positioning sleeve 1 for positioning the outer periphery of the support pipe. Furthermore, the center positioning mechanism 2 also includes a center screw 7, which is connected to the guide frame 5; the supporting assembly includes a slider 8, a stabilizing rod 9, a first elastic member 10, an extension rod 11, a wheel frame 12 and a center positioning guide wheel 13, the slider 8 is movably connected to the center screw 7, the guide frame 5 is provided with a guide groove 6, the stabilizing rod 9 is fixedly connected to the slider 8 and can be movably inserted into the guide groove 6, the first elastic member 10 is sleeved on the center screw 7, and the two ends of the first elastic member 10 respectively abut the slider 8 and the guide frame 5, the two ends of the extension rod 11 are respectively rotatably connected to the slider 8 and the wheel frame 12, the center positioning guide wheel 13 is rotatably connected to the wheel frame 12, and the circumference of the center positioning guide wheel 13 can abut against the outer periphery of the pipe. Furthermore, there are two sliders 8, stabilizer bars 9, first elastic members 10 and extension bars 11 symmetrically distributed along both ends of the center screw rod 7. The first end of the extension bar 11 is rotatably connected to the slider 8, and the second end is rotatably connected to the wheel frame 12. The spacing between the first ends of the two extension bars 11 is greater than the spacing between the second ends of the two extension bars 11. There are two center positioning guide wheels 13 symmetrically distributed at both ends of the wheel frame 12.

[0026] Further, refer to Figure 5 and Figure 6 The uniform speed transmission mechanism 3 is distributed in two groups on both sides of the positioning sleeve 1. Each uniform speed transmission mechanism 3 includes a transmission frame 14, a positioning frame 16 and a first transmission assembly. The transmission frame 14 is fixedly connected to the positioning sleeve 1, the positioning frame 16 is installed on the transmission frame 14, and the first transmission assembly is installed on the positioning frame 16, which is used to make the anti-corrosion coating device move at a uniform speed along the axial direction relative to the pipeline. Further, the first transmission assembly includes a first driving member 17, a sliding seat 18, a transmission rod 19, a friction transmission wheel 20 and a second elastic member 21. The first driving member 17 is slidably connected to the positioning frame 16, the transmission frame 14 is provided with an avoidance groove 15, the sliding seat 18 is slidably connected in the avoidance groove 15, one end of the transmission rod 19 is fixedly connected to the output end of the first driving member 17, and the other end is rotatably connected to the sliding seat 18, the friction transmission wheel 20 is fixedly connected to the transmission rod 19, and the second elastic member 21 is installed in the avoidance groove 15, and the two ends of the second elastic member 21 are respectively abutted against the transmission frame 14 and the sliding seat 18. Furthermore, the first driving member 17 is a servo motor, and the first elastic member 10 and the second elastic member 21 are both springs.

[0027] Further, refer to Figure 7 and Figure 8 The surrounding rotating spraying mechanism 4 includes a positioning ring seat 22, a sealing bearing 23, an annular sleeve 24 and a spraying assembly. The positioning ring seat 22 is fixedly connected to the positioning sleeve 1. The sealing bearing 23 is provided with two and is sleeved on the outer periphery of the positioning ring seat 22 at intervals. The annular sleeve 24 is sleeved on the outer periphery of the sealing bearing 23. A sealed chamber is formed between the positioning ring seat 22, the annular sleeve 24 and the two sealing bearings 23; the spraying assembly includes a storage tank 25, a delivery pipeline 26, a booster pump 27, a shunt pipe 28, a spraying pipe The storage tank 25 is fixedly connected to the positioning sleeve 1 for storing the anti-corrosion coating. The two ends of the delivery pipe 26 are respectively connected to the storage tank 25 and the sealed chamber. The booster pump 27 is connected to the delivery pipe 26 for delivering the anti-corrosion coating in the storage tank 25 to the sealed chamber through the delivery pipe 26. There are multiple shunt pipes 28 distributed along the circumference of the positioning ring seat 22, and the two ends of the shunt pipes 28 are respectively connected to the sealed chamber and the spraying pipe 29. The spray head 30 is installed at the outlet of the spraying pipe 29. Further, the axis of the spraying pipe 29 is parallel to the axis of the positioning sleeve 1, and there are multiple spray heads 30 distributed along the axial direction of the spraying pipe 29. Further, the spraying mechanism 4 also includes a second transmission assembly, which includes a first gear 31, a second driving member 32, a transmission shaft 33, and a second gear 34. The first gear 31 is a ring gear fixedly arranged on the outer periphery of the annular casing 24. The two ends of the transmission shaft 33 are respectively fixedly connected to the output end of the second driving member 32 and the second gear 34. The second gear 34 is meshedly connected to the first gear 31. When the second driving member 32 drives the second gear 34 to rotate, the second gear 34 can drive the first gear 31 to rotate, thereby causing the annular casing 24, the shunt pipe 28, the spraying pipe 29 and the nozzle 30 to rotate around the positioning sleeve 1. Further, the second driving member 32 is a reduction motor.

[0028] The working process of the coating device of the present invention is as follows:

[0029] First, one end of the pipe is inserted into the positioning sleeve 1 from between the friction transmission wheels 20 on both sides. When the pipe enters, it will squeeze the friction transmission wheels 20 on both sides, so that the friction transmission wheels 20 drive the transmission rod 19 and the sliding seat 18 to slide outward. When the transmission rod 19 and the sliding seat 18 slide outward, they will also drive the first driving member 17 to slide outward. At the same time, the sliding seat 18 will squeeze the second elastic member 21 in the avoidance groove 15, so that the second elastic member 21 is compressed. Under the reaction force of the second elastic member 21, the circumference of the friction transmission wheel 20 is tightly attached to the outer circumference of the pipe;

[0030] The pipeline will continue to enter and will contact the circumference of the center positioning guide wheel 13. After being squeezed, the center positioning guide wheel 13 will transfer the pressure to the extension rod 11 through the wheel frame 12. After being compressed, the extension rod 11 will push the two sliders 8 to slide away from each other along the axial direction of the center screw rod 7. The two stabilizing rods 9 will also slide away from each other in the guide groove 6. At the same time, the slider 8 will squeeze the first elastic member 10, so that the first elastic member 10 is compressed. Under the reaction force of the first elastic member 10, the circumference of the center positioning guide wheel 13 is tightly attached to the outer periphery of the pipeline to position and support the pipeline, and the center positioning guide wheel 13 can rotate relative to the wheel frame 12, so it will not hinder the continued pushing of the pipeline and will not cause damage to the outer periphery of the pipeline.

[0031] When the pipeline is pushed into the position of the shunt pipe 28, anti-corrosion paint is added into the sealed chamber of the annular casing 24. After completion, the feed port of the annular casing 24 is closed, and anti-corrosion paint is added into the storage tank 25 to raise both ends of the pipeline. After completion, the booster pump 27, the first drive member 17 and the second drive member 32 are turned on;

[0032] After the booster pump 27 is turned on, the anti-corrosion paint in the storage tank 25 can be input into the sealed chamber through the delivery pipe. When the pressure inside the sealed chamber increases, the anti-corrosion paint will enter the inside of the shunt pipe 28 and be sprayed onto the surface of the pipe through the spray pipe 29 and the nozzle 30.

[0033] After the first driving member 17 is turned on, it will drive the transmission rod 19 to rotate, and the rotation of the transmission rod 19 will drive the friction transmission wheel 20 to rotate. Since the circumference of the friction transmission wheel 20 is in close contact with the outer circumference of the pipeline, the friction transmission wheel 20 generates friction with the outer circumference of the pipeline when rotating, and then under the action of the friction force, the entire anti-corrosion coating device moves along the axial direction of the pipeline. Of course, it can be understood that the first driving members 17 on both sides are set to rotate synchronously in opposite directions;

[0034] When the second driving member 32 is turned on, it will drive the transmission shaft 33 and the second gear 34 to rotate. Since the second gear 34 is meshed with the first gear 31, the rotation of the second gear 34 will drive the first gear 31 to rotate, thereby driving the annular shell 24, the diverter pipe 28, the spray pipe 29 and the multiple nozzles 30 to rotate around the positioning sleeve 1, thereby realizing rotary spraying of the pipe.

[0035] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An anti-corrosion coating coating device, characterized in that: The invention comprises a positioning sleeve (1), a center positioning mechanism (2), a uniform speed transmission mechanism (3) and a circumferentially rotating spraying mechanism (4). The center positioning mechanism (2) is distributed in a plurality along the circumference of the positioning sleeve (1) and is used to position the outer periphery of the connecting pipe. The uniform speed transmission mechanism (3) is arranged on the positioning sleeve (1) and is used to make the anti-corrosion coating device move at a uniform speed along the axial direction relative to the pipe. The circumferentially rotating spraying mechanism (4) is arranged on the positioning sleeve (1) and can rotate along the circumferential direction relative to the positioning sleeve (1) and is used to circumferentially rotate and spray the anti-corrosion coating on the outer periphery of the pipe.

2. The anti-corrosion coating device according to claim 1, characterized in that: The center positioning mechanism (2) comprises a guide frame (5) and a support assembly. A plurality of guide frames (5) of the center positioning mechanism (2) are distributed along the circumference of the positioning sleeve (1) and connected to the outer circumference of the positioning sleeve (1). The support assembly is connected to the guide frame (5) and extends into the interior of the positioning sleeve (1) to position and support the outer circumference of the pipe.

3. The anti-corrosion coating coating device according to claim 2, characterized in that: The center positioning mechanism (2) further comprises a center screw rod (7), wherein the center screw rod (7) is connected to the guide frame (5); The support assembly comprises a slider (8), a stabilizing rod (9), a first elastic member (10), an extension rod (11), a wheel frame (12) and a center positioning guide wheel (13); the slider (8) is movably connected to the center screw rod (7); the guide frame (5) is provided with a guide groove (6); the stabilizing rod (9) is fixedly connected to the slider (8) and movably inserted into the guide groove (6); the first elastic member (10) is sleeved on the center screw rod (7), and two ends of the first elastic member (10) respectively abut against the slider (8) and the guide frame (5); two ends of the extension rod (11) are rotatably connected to the slider (8) and the wheel frame (12); the center positioning guide wheel (13) is rotatably connected to the wheel frame (12); and the circumference of the center positioning guide wheel (13) can abut against the outer circumference of the pipeline.

4. The anti-corrosion coating device according to claim 3, characterized in that: The slider (8), the stabilizing rod (9), the first elastic member (10) and the extension rod (11) are symmetrically distributed at two ends of the central screw rod (7); the first end of the extension rod (11) is rotatably connected to the slider (8), and the second end is rotatably connected to the wheel frame (12); and the spacing between the first ends of the two extension rods (11) is greater than the spacing between the second ends of the two extension rods (11); and the central positioning guide wheels (13) are symmetrically distributed at two ends of the wheel frame (12).

5. The anti-corrosion coating coating device according to claim 1, characterized in that: The uniform speed transmission mechanism (3) is provided in two groups on both sides of the positioning sleeve (1), and each group of the uniform speed transmission mechanism (3) comprises a transmission frame (14), a positioning frame (16) and a first transmission assembly, wherein the transmission frame (14) is fixedly connected to the positioning sleeve (1), the positioning frame (16) is mounted on the transmission frame (14), and the first transmission assembly is mounted on the positioning frame (16), and is used to enable the anti-corrosion coating coating device to move at a uniform speed along the axial direction relative to the pipeline.

6. The anti-corrosion coating device according to claim 5, characterized in that: The first transmission assembly comprises a first driving member (17), a sliding seat (18), a transmission rod (19), a friction transmission wheel (20) and a second elastic member (21); the first driving member (17) is slidably connected to the positioning frame (16); the transmission frame (14) is provided with an avoidance groove (15); the sliding seat (18) is slidably connected in the avoidance groove (15); one end of the transmission rod (19) is fixedly connected to the output end of the first driving member (17), and the other end is rotatably connected to the sliding seat (18); the friction transmission wheel (20) is fixedly connected to the transmission rod (19); the second elastic member (21) is installed in the avoidance groove (15), and the two ends of the second elastic member (21) respectively abut against the transmission frame (14) and the sliding seat (18).

7. The anti-corrosion coating coating device according to claim 1, characterized in that: The circumferential rotating spraying mechanism (4) comprises a positioning ring seat (22), a sealing bearing (23), an annular sleeve (24) and a spraying assembly, wherein the positioning ring seat (22) is fixedly connected to the positioning sleeve (1), the sealing bearing (23) is provided with two and spacedly sleeved on the outer periphery of the positioning ring seat (22), the annular sleeve (24) is sleeved on the outer periphery of the sealing bearing (23), and a sealed chamber is formed between the positioning ring seat (22), the annular sleeve (24) and the two sealing bearings (23); The spraying assembly comprises a storage tank (25), a delivery pipe (26), a booster pump (27), a shunt pipe (28), a spraying pipe (29) and a nozzle (30). The storage tank (25) is fixedly connected to the positioning sleeve (1) and is used to store the anti-corrosion paint. The two ends of the delivery pipe (26) are respectively connected to the storage tank (25) and the sealed chamber. The booster pump (27) is connected to the delivery pipe (26) and is used to deliver the anti-corrosion paint in the storage tank (25) to the sealed chamber through the delivery pipe (26). There are a plurality of shunt pipes (28) distributed along the circumference of the positioning ring seat (22), and the two ends of the shunt pipe (28) are respectively connected to the sealed chamber and the spraying pipe (29). The nozzle (30) is installed at the outlet of the spraying pipe (29).

8. The anti-corrosion coating device according to claim 7, characterized in that: The axis of the spraying pipeline (29) is parallel to the axis of the positioning sleeve (1), and a plurality of spray heads (30) are distributed along the axial direction of the spraying pipeline (29).

9. The anti-corrosion coating device according to claim 7, characterized in that: The spraying mechanism (4) further comprises a second transmission assembly, the second transmission assembly comprising a first gear (31), a second driving member (32), a transmission shaft (33) and a second gear (34), the first gear (31) being an annular gear fixedly arranged on the outer periphery of the annular casing (24), the two ends of the transmission shaft (33) being respectively fixedly connected to the output end of the second driving member (32) and the second gear (34), the second gear (34) being meshingly connected to the first gear (31), when the second driving member (32) drives the second gear (34) to rotate, the second gear (34) can drive the first gear (31) to rotate, thereby causing the annular casing (24), the diverter pipe (28), the spraying pipe (29) and the spray head (30) to rotate around the positioning sleeve (1).

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