Coating device for wear-resistant paint on inner layer of corrugated pipe

Abstract

The invention belongs to the technical field of corrugated pipe inner layer wear-resistant paint coating, and provides a coating device for corrugated pipe inner layer wear-resistant paint. The device comprises a mounting main seat; the mounting main seat is provided with a slide way; the at least one rotating shaft wheel set is arranged on the mounting main seat; the rotating shaft wheel set comprises an outer supporting main frame, an abutting rotating wheel and an inner supporting rotating frame. The material spraying part is arranged on the mounting main seat; the material spraying part comprises a material spraying pipe, a pressurizing mechanism and a material box; one end of the pressurizing mechanism is communicated with the material box; the other end of the pressurizing mechanism is communicated with one end of the material spraying pipe; the material spraying pipe is arranged on the mounting main seat, is positioned above the slide way, and penetrates through the outer supporting main frame along the axis direction of the slide way; wherein the spraying pipe is arranged on the inner wall of the corrugated pipe; and the wear-resistant coating is filled in the material box and is sprayed out of the material spraying pipe through the pressurizing machine.

Description

Technical Field

[0001] The invention relates to the technical field of equipment for coating wear-resistant paint on the inner layer of a corrugated pipe, and in particular to a coating device for coating wear-resistant paint on the inner layer of a corrugated pipe. Background Art

[0002] The traditional processing of the inner layer of the corrugated pipe wear-resistant coating is to use manual coating or equipment. The most commonly used method is to fix the corrugated pipe and then manually apply the coating or insert the equipment into the corrugated pipe to apply the coating. This method usually leads to inconsistent wall thickness of the coating surface, which makes the corrugated pipe easy to be damaged during future use. Therefore, in order to solve this problem, we proposed a tooling that can rotate the bellows, combined with a coating device that penetrates deep into the bellows, which can solve the problem of inconsistent wall thickness on the coating surface. Summary of the invention

[0003] In view of the defects in the prior art, the present invention provides a coating device for the inner layer of the corrugated pipe with a wear-resistant coating to solve the problem of inconsistent wall thickness of the coating surface.

[0004] The present invention provides a coating device for the inner layer of a corrugated pipe with a wear-resistant coating, characterized in that it comprises: a mounting main seat; the mounting main seat is provided with a slideway; at least one rotating shaft wheel group, the rotating shaft wheel group is arranged on the mounting main seat; the rotating shaft wheel group comprises an outer supporting main frame, an abutting rotary wheel and an inner supporting rotating frame; the outer supporting main frame is installed on both sides of the slideway, the inner supporting rotating frame is provided with three locations and is evenly arranged on the outer supporting main frame, the abutting rotary wheel is provided with three locations and is rotatably mounted on the inner supporting rotating frame respectively; wherein the abutting rotary wheel The rotating wheel abuts against the outer wall of the bellows; and a spraying part, which is arranged on the mounting main seat; the spraying part includes a spraying pipe, a pressurizing mechanism and a material box; one end of the pressurizing mechanism is communicated with the material box; the other end of the pressurizing mechanism is communicated with one end of the spraying pipe; the spraying pipe is arranged on the mounting main seat, and is located above the slide, along the axial direction of the slide, and passes through the outer supporting main frame; wherein the spraying pipe is arranged on the inner wall of the bellows; the material box is filled with wear-resistant coating, and is sprayed out from the spraying pipe through the pressurizing machine.

[0005] Furthermore, it also includes a feeding part, which is installed on the main mounting seat; the feeding part includes a sliding mechanism; and the sliding mechanism is installed on the slideway. In actual use, the purpose of this design is to ensure the effective movement of the bellows.

[0006] Furthermore, the sliding mechanism includes a screw slide module, two fixed abutment frames and two lifting cylinders; the two fixed abutment frames are respectively installed on the output shafts of the two lifting cylinders; one of the lifting cylinders is installed on the slide of the screw slide module, and the other is installed at the main mounting seat and close to the slideway direction. In actual use, the screw slide module is a common slide component on the market, so that it can effectively achieve movement. This design is an existing component and will not be repeated here. When in actual work, the fixed abutment frame can be driven by the screw slide module to achieve movement, so that unmanned operation can be achieved, effectively ensuring the overall automation of the device; at the same time, in order to facilitate the loading and unloading process of the corrugated pipe to be processed or completed, the lifting cylinder is used to achieve automated operation, wherein the lifting cylinder is driven by hydraulic drive, so that when the corrugated pipe to be processed or completed is placed on the fixed abutment frame, the up and down movement of the corrugated pipe is achieved under the up and down drive of the lifting cylinder; in this way, the loading and unloading process can be achieved.

[0007] Furthermore, the outer support main frame is provided with a support leg and a support ring sleeve; the support leg is provided with two places, the support ring sleeve is provided with a through hole, and the support leg is arranged on both sides of the through hole; wherein one end of the support leg is connected to the support ring sleeve, and the other end of the support leg is connected to the mounting main seat. In actual use, the purpose of this design is to facilitate the effective support of the above-mentioned abutment rotary wheel and the inner support rotating frame in the future, and to facilitate the movement of the feeding part. In actual work, the through hole in this design is the design of the abutment rotary wheel at three places at the same time, and the automatic centering and alignment of the bellows is realized, so that the stability of the subsequent coating process can be further guaranteed; and the design of the through hole is adopted to ensure the passability requirements during the loading and unloading process, and this design greatly saves the installation of auxiliary accessories; in the traditional fixed bellows coating tooling, a large number of loading and unloading auxiliary machinery are required, and this design reduces these requirements, so that the overall structural complexity is greatly reduced; while saving materials, parts and costs, it also improves production efficiency, saves the working time of loading and unloading, and effectively improves the overall work efficiency.

[0008] Furthermore, the inner support rotating frame includes a telescopic cylinder and a rotating mounting seat; one end of the telescopic cylinder is fixedly mounted on the inner wall of the support ring sleeve; the other end of the telescopic cylinder is connected to the rotating mounting seat; wherein the abutting rotary wheel is mounted on the rotating mounting seat. In actual use, the purpose of this design is to facilitate the realization of more accurate thickening coating process requirements. When the bellows needs to be bent, the thickness of the wear-resistant coating on the inner wall here is usually adjusted according to the actual size. The output distance of the telescopic cylinder can be adjusted at this point. The telescopic cylinder adopts a single control. The purpose of this is to achieve centering and eccentricity. In this way, when the output length of the telescopic cylinder at one place is greater than that of the other two places, the bellows can be eccentrically operated, so that the spray pipe in the bellows is close to the inner wall at one place. In this way, the local thickening requirement at the bend can be achieved.

[0009] Furthermore, the rotating shaft wheel set also includes a driving motor, which is mounted on the abutting rotary wheel and drives the abutting rotary wheel to rotate. In actual work, the driving motor is a small-sized hub motor, so that it can be easily installed, simple to operate, and easy to control.

[0010] Furthermore, the spraying part also includes a spraying rotating head; the spraying rotating head is rotatably mounted at the nozzle of the spraying pipe; the spraying rotating head has a side nozzle and a spiral guide section, at least one of the side nozzles is arranged on the side of the spraying rotating head, and the spiral guide section is arranged on the spraying rotating head and is located at the inner wall direction of the spraying pipe. In actual use, the purpose of this design is to realize rotary spraying, so that the stability of the coating process can be better guaranteed.

[0011] Furthermore, the spraying part also includes a spring and an electromagnetic ring block; the electromagnetic ring block is fixedly mounted on the outer wall of the spraying pipe and close to the spraying rotating head; one end of the spring is fixedly mounted on the spraying rotating head, and the other end of the spring passes through the nozzle of the spraying pipe and abuts against the outer wall of the electromagnetic ring block; wherein the electromagnetic ring block is electrically connected to the spraying rotating head. In actual use, the purpose of this design is to achieve the discharge of the coating fluid at the spraying rotating head; wherein, when the electromagnetic ring block is energized, the magnetic attraction force generated attracts the spraying rotating head to approach, thereby achieving an inward squeezing force, increasing the pressure at the nozzle of the spraying pipe, and at the same time making the spraying rotating head oscillate in the downward pressure and recovery, which is conducive to the shaking of the spraying rotating head, that is, to discharge the material in the spraying rotating head, thereby avoiding the situation where the material remains on the spraying rotating head.

[0012] Furthermore, it also includes a guide assembly; the guide assembly includes a guide inner sleeve, a guide support frame and a guide wheel; the guide inner sleeve is slidably mounted on the spray pipe and is located on the outer wall of the spray pipe; the guide support frame is provided at three locations and is evenly distributed along the radial direction of the guide inner sleeve; one end of the guide support frame is connected to the guide inner sleeve; the guide wheel is installed at the other end of the guide support frame. In actual use, this design can effectively ensure stability and facilitate operation. This design is to ensure the stability of the inner wall of the corrugated pipe and achieve internal and external stability.

[0013] It can be seen from the above technical solution that the coating device for the inner layer wear-resistant coating of the corrugated pipe provided by the present invention has the following beneficial effects: (1) In actual use, the stability of the entire device is effectively guaranteed by the installation main seat; (2) At the same time, there are no less than two rotating shaft wheel groups. The purpose of this design is to ensure that the rotating shaft wheel group can effectively stabilize the rotation of the bellows during the rotation process, and the number of rotating shaft wheel groups can also be increased according to the length of the bellows to be coated to maintain stability. The design of the outer support main frame, the abutting rotary wheel and the inner support rotating frame adopted by the rotating shaft wheel group is similar to the principle of planetary gears. The abutting rotary wheels are evenly arranged at three points, that is, three places. The abutting rotary wheels are rotated to ensure the stability of the bellows, or the coaxiality. On the other hand, the abutting rotary wheel in this design drives the bellows abutting therewith by rotating, so that the bellows can be rotated, which is convenient for subsequent coating processing. Its essence is to ensure the stability of the coating thickness by changing the processing reference. (3) At the same time, the spray pipe, pressurizing mechanism and material box are used; the pressurizing mechanism used is a common pressurizing pump; in this way, the paint in the material box is sprayed into the bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for the specific embodiments or the prior art description. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0015] Figure 1 A front view of a coating device for applying wear-resistant coating to the inner layer of a corrugated pipe provided in an embodiment of the present invention; Figure 2 It is a schematic diagram of the loading working process of the lifting cylinder in the feeding part of the present invention; Figure 3 It is a schematic diagram of the working process of the telescopic cylinder in the feeding part of the present invention clamping the bellows; Figure 4It is a front view schematic diagram of the guide assembly in the present invention; Figure 5 It is a schematic diagram of the main view of the spraying rotating head in the present invention; Figure 6 It is a schematic diagram of the partial structure of the main view of the spray rotating head in the present invention; Reference numerals: Install the main seat 1, the slide 101, the rotating shaft wheel group 2, the outer supporting main frame 21, the abutting rotary wheel 22, the supporting leg 211, the supporting ring sleeve 212, the through port 213, the inner supporting rotating frame 23, the telescopic cylinder 231, the rotating mounting seat 232, the driving motor 24, the spraying part 3, the spraying pipe 31, the pressurizing mechanism 32, the material box 33, the spraying rotating head 34, the side nozzle 341, the spiral guide section 342, the spring 35, the electromagnetic ring block 36, the feeding part 4, the sliding mechanism 41, the screw slide module 411, the fixed abutting frame 412, the lifting cylinder 413, the guide assembly 5, the guide inner sleeve 51, the guide support frame 52, and the guide rotary wheel 53. DETAILED DESCRIPTION

[0016] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0017] The embodiment is basically as shown in the attached Figures 1 to 3 As shown: like Figure 1 - Figure 3 As shown, the coating device for the inner layer of the corrugated pipe provided in this embodiment can solve the problem of inconsistent wall thickness of the coating surface.

[0018] The present invention provides a coating device for the inner layer of a corrugated pipe with a wear-resistant coating, characterized in that it comprises: a mounting main seat 1; the mounting main seat 1 is provided with a slideway 101; at least one rotating shaft wheel group 2, and the rotating shaft wheel group 2 is arranged on the mounting main seat 1; the rotating shaft wheel group 2 comprises an outer supporting main frame 21, an abutting rotary wheel 22 and an inner supporting rotating frame 23; the outer supporting main frame 21 is installed on both sides of the slideway 101, the inner supporting rotating frame 23 is provided with three locations and is evenly arranged on the outer supporting main frame 21, the abutting rotary wheel 22 is provided with three locations and is rotatably installed on the inner supporting rotating frame 23 respectively; wherein the abutting rotary wheel 22 Abutting against the outer wall of the bellows; and a spraying part 3, which is arranged on the mounting main seat 1; the spraying part 3 includes a spraying pipe 31, a pressurizing mechanism 32 and a material box 33; one end of the pressurizing mechanism 32 is communicated with the material box 33; the other end of the pressurizing mechanism 32 is communicated with one end of the spraying pipe 31; the spraying pipe 31 is arranged on the mounting main seat 1, and is located above the slide 101, and along the axial direction of the slide 101, and passes through the outer support main frame 21; wherein the spraying pipe 31 is arranged on the inner wall of the bellows; the material box 33 is filled with wear-resistant coating, and is sprayed out from the spraying pipe 31 through the pressurizing machine. In actual use, the stability of the entire device is effectively guaranteed by the installation main seat 1; at the same time, the rotating shaft wheel group 2 is provided at least two places, and the purpose of this design is to ensure that the bellows is rotating. The rotating shaft wheel group 2 can effectively stabilize the rotation of the bellows, and the number of rotating shaft wheel groups 2 can also be increased according to the length of the bellows to be coated to maintain stability; wherein, the design of the outer supporting main frame 21, the abutting rotating wheel 22 and the inner supporting rotating frame 23 adopted by the rotating shaft wheel group 2 is similar to the principle of planetary gears, through three points , that is, three evenly distributed abutment wheels 22; through the rotating abutment wheels 22; to ensure the stability of the bellows, or coaxiality; and on the other hand, the abutment wheels 22 in this design achieve a driving effect on the bellows abutting therewith by rotating, so that the rotation of the bellows can be achieved; convenient for subsequent paint processing; at the same time, the spray pipe 31, pressurizing mechanism 32 and material box 33 are used; the pressurizing mechanism 32 used is a common pressurizing pump; in this way, the paint in the material box 33 is sprayed into the bellows.

[0019] At the same time, in order to facilitate loading and unloading, in this embodiment, it also includes a feeding part 4, which is installed on the main mounting seat 1; the feeding part 4 includes a sliding mechanism 41; the sliding mechanism 41 is installed on the slide 101. In actual use, the purpose of this design is to ensure the effective movement of the bellows. In order to further realize loading and unloading, in this embodiment, the sliding mechanism 41 includes a screw slide module 411, two fixed abutment frames 412 and two lifting cylinders 413; the two fixed abutment frames 412 are respectively installed on the output shafts of the two lifting cylinders 413; one of the lifting cylinders 413 is installed on the slide of the screw slide module 411, and the other is installed on the main mounting seat 1 and close to the slide 101. In actual use, the screw slide module 411 is a common slide component on the market, so that it can effectively realize movement. This design is an existing component and will not be repeated here. During actual work, the fixed abutment frame 412 can be moved under the drive of the screw slide module 411, so that unmanned operation can be realized, effectively ensuring the overall automation level of the device; at the same time, in order to facilitate the loading and unloading process of the corrugated pipes to be processed or completed, the automated operation is realized through the lifting cylinder 413, wherein the lifting cylinder 413 adopts a hydraulic drive mode, so that when the corrugated pipes to be processed or completed are placed on the fixed abutment frame 412, the up and down movement of the corrugated pipes is realized under the up and down drive of the lifting cylinder 413; in this way, the loading and unloading process can be realized.

[0020] Furthermore, in order to facilitate better support, in the present embodiment, the outer support main frame 21 is provided with a support leg 211 and a support ring sleeve 212; the support leg 211 is provided with two locations, the support ring sleeve 212 is provided with a through opening 213, and the support leg 211 is arranged on both sides of the through opening; wherein one end of the support leg 211 is connected to the support ring sleeve 212, and the other end of the support leg 211 is connected to the mounting main seat 1. In actual use, the purpose of this design is to facilitate the effective support of the above-mentioned abutment wheel 22 and the inner support rotating frame 23 in the future, and to facilitate the movement of the feeding part 4. In actual work, the through-port 213 in this design is a design that abuts the rotary wheel 22 at three places at the same time, and realizes the automatic centering and alignment of the bellows. In this way, the stability of the subsequent coating process can be further guaranteed; and the design of the through-port 213 is adopted to ensure the passability requirements during the loading and unloading process. This design greatly saves the installation of auxiliary accessories; in the traditional fixed bellows coating tooling, a large number of loading and unloading auxiliary machinery are required, and this design reduces these requirements. In this way, the complexity of the overall structure is greatly reduced; while saving materials, parts and costs, it also improves production efficiency, saves the working time of loading and unloading, and effectively improves the overall work efficiency.

[0021] Among them, in order to facilitate the painting of the inner wall bending part of the corrugated pipe, in this embodiment, the inner support rotating frame 23 includes a telescopic cylinder 231 and a rotating mounting seat 232; one end of the telescopic cylinder 231 is fixedly mounted on the inner wall of the support ring sleeve 212; the other end of the telescopic cylinder 231 is connected to the rotating mounting seat 232; wherein the abutting rotary wheel 22 is mounted on the rotating mounting seat 232. In actual application, the purpose of this design is to facilitate the realization of more accurate thickening coating process requirements. When the bellows needs to bend, the wear-resistant coating thickness of the inner wall here is usually adjusted; in this way, the output distance of the telescopic cylinder 231 can be adjusted according to the actual size, and the telescopic cylinder 231 adopts a single control. The purpose of this is to achieve centering and eccentric effect. In this way, when the output length of the telescopic cylinder 231 at one place is greater than that of the other two places, the bellows can be eccentrically operated, so that the spray pipe 31 in the bellows is close to the inner wall of one place. In this way, the local thickening requirement at the bend can be achieved.

[0022] In this embodiment, the rotating shaft wheel set 2 further includes a driving motor 24, which is mounted on the abutting rotary wheel 22 and drives the abutting rotary wheel 22 to rotate. In actual work, the driving motor 24 is a hub motor of a smaller size, so that it can be easily installed, simple to operate, and easy to control.

[0023] In this embodiment, the spraying part 3 further includes a spraying rotating head 34; the spraying rotating head 34 is rotatably mounted at the nozzle of the spraying pipe 31; the spraying rotating head 34 has a side nozzle 341 and a spiral guide section 342, at least one of the side nozzles 341 is arranged on the side of the spraying rotating head 34, and the spiral guide section 342 is arranged on the spraying rotating head 34 and is located at the inner wall direction of the spraying pipe 31. In actual use, the purpose of this design is to realize rotary spraying, so that the stability of the coating process can be better guaranteed.

[0024] To facilitate unloading, in the present embodiment, the spraying part 3 further includes a spring 35 and an electromagnetic ring block 36; the electromagnetic ring block 36 is fixedly mounted on the outer wall of the spraying pipe 31 and is close to the spraying rotating head 34; one end of the spring 35 is fixedly mounted on the spraying rotating head 34, and the other end of the spring 35 passes through the nozzle of the spraying pipe 31 and abuts against the outer wall of the electromagnetic ring block 36; wherein the electromagnetic ring block 36 is electrically connected to the spraying rotating head 34. In actual use, the purpose of this design is to realize the discharge of coating fluid at the spray rotating head 34; wherein, when the electromagnetic ring block 36 is energized, the magnetic attraction force generated attracts the spray rotating head 34 to approach, thereby realizing an inward extrusion force, which increases the pressure at the nozzle of the spray pipe 31, and at the same time makes the spray rotating head 34 oscillate during the downward pressure and the upward movement, which is conducive to the shaking of the spray rotating head 34, that is, to discharge the material in the spray rotating head 34, thereby avoiding the situation where the material remains on the spray rotating head 34.

[0025] In this embodiment, a guide assembly 5 is also included; the guide assembly 5 includes a guide inner sleeve 51, a guide support frame 52 and a guide runner 53; the guide inner sleeve is slidably mounted on the spray pipe 31 and is located on the outer wall of the spray pipe 31; the guide support frame 52 is provided at three locations and is evenly distributed along the radial direction of the guide inner sleeve 51; one end of the guide support frame 52 is connected to the guide inner sleeve 51; the guide runner 53 is installed at the other end of the guide support frame 52. In actual use, this design can effectively ensure stability and facilitate operation. This design is to ensure the stability of the inner wall of the corrugated pipe and achieve internal and external stability.

[0026] To sum up, this coating device for the inner layer of wear-resistant coating of corrugated pipe is not only reasonably designed but also simple to operate. By changing the processing reference in the coating tooling process, the overall processing and coating process accuracy is effectively improved, while effectively ensuring the stability of the coating. It can also increase the coating thickness according to actual needs. Therefore, the device is suitable for industry promotion.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A coating device for the inner layer of a corrugated pipe with a wear-resistant coating, characterized in that: include: Install the main seat; the main seat is provided with a slideway; At least one rotating shaft wheel group is arranged on the main mounting seat; the rotating shaft wheel group includes an outer supporting main frame, an abutting rotary wheel and an inner supporting rotating frame; the outer supporting main frame is installed on both sides of the slideway, the inner supporting rotating frame is provided at three locations and is evenly arranged on the outer supporting main frame, the abutting rotary wheel is provided at three locations and is rotatably mounted on the inner supporting rotating frame respectively; wherein the abutting rotary wheel abuts against the outer wall of the corrugated tube; and A spraying part, which is arranged on the main mounting seat; the spraying part includes a spraying pipe, a pressurizing mechanism and a material box; one end of the pressurizing mechanism is communicated with the material box; the other end of the pressurizing mechanism is communicated with one end of the spraying pipe; the spraying pipe is arranged on the main mounting seat, and is located above the slide, along the axial direction of the slide, and passes through the outer supporting main frame; wherein the spraying pipe is arranged on the inner wall of the corrugated pipe; the material box is filled with wear-resistant coating, and is sprayed out from the spraying pipe through the pressurizing machine.

2. A coating device for the inner layer of a corrugated pipe with a wear-resistant coating according to claim 1, characterized in that: It also includes a feeding part, which is installed on the main mounting seat; the feeding part includes a sliding mechanism; and the sliding mechanism is installed on the slideway.

3. A coating device for the inner layer of a corrugated pipe with a wear-resistant coating according to claim 2, characterized in that: The sliding mechanism includes a screw slide module, two fixed abutment frames and two lifting cylinders; the two fixed abutment frames are respectively installed on the output shafts of the two lifting cylinders; one of the lifting cylinders is installed on the slide of the screw slide module, and the other is installed on the mounting main seat and close to the slide direction.

4. A coating device for the inner layer of a corrugated pipe with a wear-resistant coating according to claim 1, characterized in that: The outer supporting main frame is provided with supporting legs and supporting ring sleeves; the supporting legs are provided with two locations, the supporting ring sleeve is provided with a passage opening, and the supporting legs are arranged on both sides of the passage opening; wherein one end of the supporting leg is connected to the supporting ring sleeve, and the other end of the supporting leg is connected to the mounting main seat.

5. A coating device for the inner layer of a corrugated pipe with a wear-resistant coating according to claim 4, characterized in that: The inner support rotating frame includes a telescopic cylinder and a rotating mounting seat; one end of the telescopic cylinder is fixedly mounted on the inner wall of the supporting ring sleeve; the other end of the telescopic cylinder is connected to the rotating mounting seat; wherein the abutting rotary wheel is mounted on the rotating mounting seat.

6. A coating device for the inner layer of a corrugated pipe with a wear-resistant coating according to claim 5, characterized in that: The rotating shaft wheel set also includes a driving motor, which is mounted on the abutting rotary wheel and drives the abutting rotary wheel to rotate.

7. The coating device for the inner layer of the corrugated pipe according to claim 1 is characterized in that: The spraying part also includes a spraying rotating head; the spraying rotating head is rotatably installed at the nozzle of the spraying pipe; the spraying rotating head has side nozzles and a spiral guide section, and at least one side nozzle is arranged on the side of the spraying rotating head, and the spiral guide section is arranged on the spraying rotating head and is located at the inner wall direction of the spraying pipe.

8. A coating device for the inner layer of a corrugated pipe with a wear-resistant coating according to claim 7, characterized in that: The spraying part also includes a spring and an electromagnetic ring block; the electromagnetic ring block is fixedly mounted on the outer wall of the spraying pipe and is close to the spraying rotating head; one end of the spring is fixedly mounted on the spraying rotating head, and the other end of the spring passes through the nozzle of the spraying pipe and abuts against the outer wall of the electromagnetic ring block; wherein the electromagnetic ring block is electrically connected to the spraying rotating head.

9. The coating device for the inner layer of the corrugated pipe with wear-resistant coating according to claim 1, characterized in that: It also includes a guide assembly; the guide assembly includes a guide inner sleeve, a guide support frame and a guide wheel; the guide inner slide is installed on the spray pipe and is located on the outer wall of the spray pipe; the guide support frame is provided at three locations and is evenly distributed along the radial direction of the guide inner sleeve; one end of the guide support frame is connected to the guide inner sleeve; the guide wheel is installed at the other end of the guide support frame.

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