Irregular long and narrow runner inner wall ceramic coating coating device

Abstract

The invention particularly relates to a coating device for a ceramic coating on the inner wall of an irregular long and narrow runner. The coating device comprises a guide frame (1), a feeding disc (2), an outer contour elastic support (3), a rubber roller (4) and a dead angle blade coating block (5), the feeding disc (2) and the rubber rolling wheel (4) are carried on the outer contour elastic support (3), and the dead angle blade coating blocks (5) are installed on the two sides of the bottom of the outer contour elastic support (3); the feeding disc (2) is respectively in contact connection with the rubber roller (4) and the dead angle blade coating block (5), and the rubber roller (4) and the dead angle blade coating block (5) are respectively in contact connection with the inner wall of a runner; the feeding disc (2) is connected with the guide frame (1) through a PVC (polyvinyl chloride) elastic pipeline, and the guide frame (1) is manually controlled to advance on the inner wall of a runner through the PVC elastic pipeline; the guide frame (1) moves on the inner wall of the flow channel to drive the outer contour elastic support (3) to move on the inner wall of the flow channel. According to the invention, high-quality coating of the ceramic coating on the inner wall of the irregular long and narrow runner is realized.

Description

Technical Field

[0001] The invention relates to the technical field of anti-corrosion coating, and in particular to a device for applying a ceramic coating to the inner wall of an irregular narrow and long flow channel. Background Art

[0002] Common pumps used in seawater environments include single volute and double volute structures. The double volute structure is used in many large centrifugal pumps due to its balanced radial thrust. Double volute pumps are used in seawater environments with high sediment content and harsh service environment. As a result, the double volute pumps will inevitably be eroded by the fluid during operation. At the same time, due to the corrosion of the medium itself, it is necessary to apply a wear-resistant and anti-corrosion coating on the inner wall of the double volute pump casing. Especially in some working conditions with obvious erosion, it is currently a common practice to use ceramic coatings to maintain the inner wall of the double volute pump casing.

[0003] Ceramic coating has excellent properties such as wear resistance, erosion resistance, high hardness, and high strength. Therefore, the use of ceramic coating is extremely effective for double volute structure pumps used in seawater environments with high sediment content. During the construction process, the ceramic coating is not easy to apply due to its extremely high viscosity. Operators without relevant experience find it difficult to apply it evenly, which can easily lead to waste. In addition, one side of the flow channel in the double volute structure pump is an irregular arc surface with a large change in curvature, and the entire flow channel is long. When performing ceramic coating maintenance, there is no suitable tooling to perform surface treatment on the inside of the flow channel. It is also difficult to observe the coating coverage when applying the coating. It is an area that is inaccessible to the paint. During actual maintenance, the workers can only clean and apply it blindly based on their experience.

[0004] In this case, the adhesion of the ceramic coating is greatly affected, and the protection ability of the ceramic coating on the flow channel is also greatly weakened, which often causes perforation of the double volute structure pump, affecting the reliability of the equipment. Therefore, it is necessary to design a ceramic coating coating device for the inner wall of the irregular narrow flow channel, which can controllably and accurately process, clean, coat and inspect the inner wall of the flow channel in real time to ensure the construction quality of the ceramic coating and the reliability of the double volute structure pump. Summary of the invention

[0005] The purpose of the present invention is to provide a device for coating the inner wall of an irregular narrow and long flow channel with a ceramic coating, so as to solve the problem that it is difficult to carry out high-quality coating of the ceramic coating on the inner wall of an irregular narrow and long flow channel of a double-volute structure pump, and to achieve high-quality coating of the ceramic coating on the inner wall of an irregular narrow and long flow channel of a double-volute structure pump.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A device for coating ceramic coating on the inner wall of an irregular narrow and long flow channel comprises a guide frame, a feed tray, an outer contour elastic support, a rubber roller and a dead angle scraping block; the feed tray and the rubber roller are both mounted on the outer contour elastic support, and the feed tray is connected to the guide frame through a PVC elastic pipe; the dead angle scraping block is installed on both sides of the bottom of the outer contour elastic support; the feed tray is respectively in contact with the rubber roller and the dead angle scraping block, and the rubber roller and the dead angle scraping block are respectively in contact with the inner wall of the flow channel; the guide frame is artificially controlled to move on the inner wall of the flow channel through the PVC elastic pipe; the guide frame moves on the inner wall of the flow channel to drive the outer contour elastic support to move on the inner wall of the flow channel, thereby driving the rubber roller to move in the flow channel.

[0008] In the present invention, the feeding plate includes a dead corner feeding port, a first feeding through hole, a second feeding through hole, a feeding pipe, a feeding trough, a third feeding through hole and a feeding channel; the dead corner feeding port is on both sides of the first feeding through hole and the second feeding through hole; the feeding pipe is connected with the feeding channel, the feeding channel is connected with the feeding trough through the third feeding through hole, and the first feeding through hole and the second feeding through hole are respectively connected with adjacent feeding channels; the dead corner feeding port is contacted and connected with the dead corner scraping block through a rounded slide structure, and the feeding trough is contacted and connected with the rubber roller; the feeding pipe is connected with the PVC elastic pipe.

[0009] In the present invention, the outer contour elastic bracket includes an elastic bracket and a rubber roller bearing and a positioning block installed on the elastic bracket; the dead angle scraping blocks are installed on both sides of the bottom of the elastic bracket; the elastic bracket is an arched elastic structure; the rubber roller is installed on the elastic bracket through the rubber roller bearing; the elastic bracket is staggered; the rubber roller is arranged longitudinally on the elastic bracket, and the positioning block positions the longitudinally arranged rubber roller.

[0010] In the present invention, the guide frame includes a first guide wheel frame, a second guide wheel frame, a guide wheel and a guide wheel frame support; the first guide wheel frame is installed at the bottom of the guide wheel support through a spring shaft, and the second guide wheel frame is fixedly installed on the front; the guide wheels are installed on the first guide wheel frame and the second guide wheel frame; the spring shaft cooperates with the first guide wheel frame to make the guide wheel abut against the inner wall of the flow channel, thereby fixing the guide frame on the inner wall of the flow channel; the guide frame is in rigid contact with the first feeding tray connected thereto; the outer contour of the guide frame is substantially consistent with the feeding tray.

[0011] In the present invention, the feeding pipe is connected to the feeder through a PVC pipe; the feeder includes a feeding nozzle, a barrel, a feeding mechanism and a handle; the barrel is filled with paint, the barrel is connected to the feeding mechanism, the feeding mechanism is connected to the feeding nozzle, and a handle is installed on the feeding mechanism; the material channel is used to heat the paint at a constant temperature; the feeding mechanism is used to feed the paint into the feeding pipe through the feeding nozzle and the PVC pipe by electric pressurization.

[0012] In the present invention, the rubber roller is a three-layer rubber roller.

[0013] In the present invention, the rubber roller comprises a rubber surface; an inflation valve is arranged on the rubber surface; and the material of the rubber surface is an oleophobic material.

[0014] Beneficial technical effects of the present invention:

[0015] The device for coating the inner wall of an irregular narrow and long flow channel of the present invention realizes high-quality coating of the ceramic coating on the inner wall of an irregular narrow and long flow channel of a double-volute structure pump. Specifically, the guide frame can ensure smooth and reliable operation, high efficiency and positioning accuracy, and good maneuverability by artificially applying external force. The main structure of the outer contour elastic bracket adopts elastic material, which can produce elastic deformation as the size of the flow channel changes, thereby adapting to changes in the cross-section of the flow channel and adapting to flow channels of various sizes, lengths and specifications. The free end of the outer contour elastic bracket adopts a rubber roller design to ensure the support stiffness of the outer contour elastic bracket in the vertical direction. Through the elastic contact between the outer contour elastic bracket and the inner wall of the flow channel, the surface of the rubber roller can touch any position of the inner wall of the flow channel, thereby realizing the surface treatment of the entire inner wall of the flow channel and anti-corrosion operations such as brushing of the ceramic coating. The feeder has a heating and heat preservation function. The paint fed into the feed tray can be heated and maintained at a constant temperature, so that the ceramic paint can be spread more evenly and the coating quality of the ceramic coating can be better guaranteed; the combination of the feed tray + rubber roller allows the rubber roller to simulate the action of manual filling and fill the pits in the flow channel; when applying the ceramic coating, an adaptive variable cross-section method is adopted to continuously apply the paint from the opening on one side of the flow channel to the opening on the other side in real time. There will be no omissions in the coating in the flow channel, and full coverage of the entire flow channel is achieved; not only can brushing operations be performed, but also pits and steps in the flow channel can be scraped to fill ceramic particles with better wear resistance and scraped ceramics that can only be loaded by scraping, so as to achieve better ceramic coating effects; and due to the particularity of the rubber roller, the whole process avoids the disadvantage of uneven coating of the paint and saves paint. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the irregular narrow flow channel of the double volute structure pump;

[0017] Figure 2 It is a schematic diagram of the structure of a device for coating the inner wall of an irregular narrow and long flow channel with a ceramic coating;

[0018] Figure 3 It is a structural schematic diagram of the feeding tray;

[0019] Figure 4 is a cross-sectional schematic diagram of the feeding tray;

[0020] Figure 5 It is a structural schematic diagram of the rubber roller bracket;

[0021] Figure 6is a structural schematic diagram of the guide frame;

[0022] Figure 7 It is a structural schematic diagram of a rubber roller;

[0023] Figure 8 It is a structural schematic diagram of the feeder;

[0024] Fig. 9 It is a schematic diagram of the irregular narrow and long flow channel inner wall ceramic coating coating device of the present invention starting to enter the flow channel;

[0025] Fig.10 This is a schematic diagram showing that the device for coating the inner wall of an irregular narrow and long flow channel of the present invention with a ceramic coating has entered the flow channel.

[0026] In the figure, 1-guide frame; 2-feeding plate; 3-outer contour elastic bracket; 4-rubber roller; 5-dead angle scraping block; 6-first guide wheel frame; 7-second guide wheel frame; 8-guide wheel; 9-spring shaft; 10-guide wheel frame support; 11-feeding nozzle; 12-barrel; 13-feeding mechanism; 14-handle; 201-dead angle feeding port; 202-first feeding through hole; 203-second feeding through hole; 204-feeding pipe; 205-feeding through groove; 206-third feeding through hole; 207-feeding channel; 301-elastic bracket; 302-rubber roller bearing; 303-positioning block; 401-inflating valve; 402-rubber surface.

[0027] Figure 1 In the figure, the arrow area is the area that cannot be reached by the paint. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “left end”, “right end”, “above”, “below”, “outside”, “inside”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Furthermore, the terms “first,” “second,” “third,” etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0031] There are the following difficulties in applying ceramic coating to the inner wall of the flow channel of a double-volute structure pump: the coating has extremely high viscosity and contains fine particles, so methods such as spin coating are not applicable; unknown slight changes occur in the flow channel cross-section in areas that the coating cannot reach; the coating needs to fill in the tiny gaps in the inner wall of the pipe; the construction environment temperature is uncertain, and the coating temperature needs to be maintained at a constant temperature.

[0032] The device for coating the inner wall of the irregular narrow and long flow channel with ceramic coating in this embodiment adopts the method of extrusion and roller coating to coat the inner wall of the flow channel with ceramic coating, thereby solving the above-mentioned difficulties in coating the inner wall of the flow channel of a double volute structure pump with ceramic coating.

[0033] See also Figure 2 This embodiment provides a ceramic coating device for the inner wall of an irregular narrow and long flow channel, which achieves coating and inspection of the interior of the flow channel by entering the inner wall of the flow channel from one side of the flow channel opening of a double-volute structure pump.

[0034] The ceramic coating coating device for the inner wall of an irregular narrow and long flow channel described in this embodiment includes a guide frame 1, a feed tray 2, an outer contour elastic support 3, a rubber roller 4 and a dead angle scraping block 5; the feed tray 2 and the rubber roller 4 are both mounted on the outer contour elastic support 3, and the feed tray 2 is connected to the guide frame 1 through a PVC elastic pipe; the dead angle scraping block 5 is installed on both sides of the bottom of the outer contour elastic support 3; the feed tray 2 is respectively in contact with the rubber roller 4 and the dead angle scraping block 5, and the rubber roller 4 and the dead angle scraping block 5 are respectively in contact with the inner wall of the flow channel; the guide frame 1 is artificially controlled to move on the inner wall of the flow channel through the PVC elastic pipe; the guide frame 1 moves on the inner wall of the flow channel, driving the outer contour elastic support 3 to move on the inner wall of the flow channel, thereby driving the rubber roller 4 to move in the flow channel.

[0035] See also Figure 3-4 and 9-10, in the present embodiment, the feed tray 2 comprises a dead corner feed port 201, a first feed through hole 202, a second feed through hole 203, a feed pipe 204, a feed trough 205, a third feed through hole 206 and a feed channel 207; the dead corner feed port 201 is on both sides of the first feed through hole 202 and the second feed through hole 203; the feed pipe 204 is connected with the feed channel 207, the feed channel 207 is connected with the feed trough 205 through the third feed through hole 206, the first feed through hole 202 and the second feed through hole 203 are respectively connected with the adjacent feed channels 207; the dead corner feed port 201 is contacted and connected with the dead corner scraping block 5 through the rounded slide structure, and the feed trough 205 is contacted and connected with the rubber roller 4; the feed pipe 204 is connected with the PVC elastic pipe, and the brushing is reciprocated by the external PVC elastic pipe artificial control device to realize the high viscosity paint coating operation in the blind area of ​​the field of vision.

[0036] The paint is fed into the feed pipe 204 through the PVC pipe, then into the feed channel 207, and then into the feed trough 205 through the third feed hole 206, and finally delivered to the surface of the rubber roller 4 through the feed trough 205; the paint is also evenly extruded through the first feed hole 202 and the second feed hole 203, and fed into the dead corner scraping block 5 through the dead corner feed port 201 and the rounded slide structure, accurately and quickly filling the required paint at the corner during the painting process.

[0037] See also Figure 5 In this embodiment, the outer contour elastic bracket 3 includes an elastic bracket 301 and a rubber roller bearing 302 and a positioning block 303 installed on the elastic bracket 301; the dead angle scraping block 5 is installed on both sides of the bottom of the elastic bracket 301; the elastic bracket 301 is an arch structure and adopts elastic material, so there is an outward radial force as a whole, so that the rubber roller 4 is more in line with the inner wall of the flow channel; the rubber roller 4 is installed on the elastic bracket 301 through the rubber roller bearing 302, and the rubber roller bearing 302 cooperates with the rubber roller 4, so that the rubber roller 4 can roll on the inner wall of the flow channel; the elastic bracket 301 is staggered, so that the paint distribution in the rolling area of ​​the rubber roller 4 is more uniform; the rubber roller 4 is arranged longitudinally on the elastic bracket 301, and the positioning block 303 positions the longitudinally arranged rubber roller 4.

[0038] See also Figure 6 The guide frame 1 includes a first guide wheel frame 6, a second guide wheel frame 7, a guide wheel 8 and a guide wheel frame support 10; the first guide wheel frame 6 is installed at the bottom of the guide wheel support 10 through a spring shaft 9, and the second guide wheel frame 7 is fixedly installed on the front; the guide wheel 8 is installed on the first guide wheel frame 6 and the second guide wheel frame 7; the spring shaft 9 cooperates with the first guide wheel frame 6 to make the guide wheel 8 abut against the inner wall of the flow channel, so as to fix the guide frame 1 on the inner wall of the flow channel; the guide frame 1 is in rigid contact with the first feeding tray 2 connected thereto; the outer contour of the guide frame 1 is substantially consistent with the feeding tray 2, so as to ensure that the force on the feeding tray 2 is uniform.

[0039] See also Figure 7 In this embodiment, the rubber roller 4 includes a rubber surface 402; an air filling valve 401 is provided on the rubber surface 402, and the air filling or air deflation of the rubber roller 4 is achieved through the air filling valve 401; the material of the rubber surface 402 is an oleophobic material, which ensures that the rubber roller 4 does not adhere to the paint to the greatest extent.

[0040] In this embodiment, the rubber roller 4 is a three-layer rubber roller.

[0041] See also Figure 8In this embodiment, the feeding pipe 204 is connected to the feeder through a PVC pipe; the feeder includes a feeding nozzle 11, a barrel 12, a feeding mechanism 13 and a handle 14; the barrel 12 is filled with paint, the barrel 12 is connected to the feeding mechanism 13, the feeding mechanism 13 is connected to the feeding nozzle 11, and the handle 14 is installed on the feeding mechanism 13; the material channel 12 is used to heat the paint at a constant temperature; the feeding mechanism 13 is used to feed the paint into the feeding pipe 204 through the feeding nozzle 11 and the PVC pipe by electric pressurization.

[0042] In order to ensure the stability, smoothness and reliability of the device's movement inside the flow channel, the device uses an outer contour elastic bracket 3 with a rubber roller 4. The feed tray 2 is mounted on the outer contour elastic bracket 3 and connected to the guide frame 1 through a PVC elastic tube; the guide frame 1 drives the outer contour elastic bracket 3 to move in the flow channel under the action of external force, thereby driving the rubber roller 4 to move in the flow channel.

[0043] In order to ensure that the rubber roller 4 moves smoothly, accurately and reliably, and to ensure the load capacity of the working module it carries and adapt to the cross-sectional changes in the working area, the rubber roller 4 is constrained by an outer contour elastic bracket 3.

[0044] The rubber rollers 4 are designed with staggered distribution. The coating thickness on the inner wall surface of the flow channel can be controlled by increasing or decreasing the inflation volume of the rubber rollers 4 to adapt to coatings of various specifications and painting requirements.

[0045] In order to ensure the vertical rigidity of the outer contour elastic bracket 3 and avoid distortion of the free end of the outer contour elastic bracket 3 during operation, a very small contact gap is reserved between one side of the rubber roller 4 and the feeding groove 205 of the feeding tray 2, and the paint is used as a lubricant to offset and reduce the friction of the pipe wall while ensuring that its performance meets the requirements.

[0046] The free end of the outer contour elastic bracket 3 moves in coordination with the surface of the inner wall of the flow channel by utilizing an elastic structure, so that the rubber roller 4 can touch any surface in the flow channel.

[0047] In order to ensure the effect of coating on the inner surface of the flow channel and take into account the space limitation in the flow channel, the coating work adopts the method of combining feeding tray + rubber roller. The feeding tray can evenly transport the paint to the surface of the rubber roller, and the staggered rubber rollers are used for rolling. Due to the special arched structure of the outer profile bracket, it can ensure that all rubber rollers are evenly stressed and there is no dead angle in the coating.

[0048] To ensure the cleanliness of the flow channel, you can directly use a rubber roller wrapped with a brush to clean it first and then apply the paint.

[0049] To ensure the protective ability of the coating, when using the device in the flow channel, roll it back and forth 2-3 times when encountering pits, steps, etc. to ensure that the pits, steps, etc. are filled with coating, so that the surface of the flow channel is smooth and rounded, and then continue to move forward.

[0050] Due to the extremely high viscosity of the paint, the paint will have shortcomings such as poor fluidity, so the paint is heated in advance to reduce the viscosity of the paint and improve the fluidity of the paint; because the increase in temperature will cause the paint to solidify too quickly, a three-layer rubber roller is used to ensure that the paint is applied without dead corners.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A ceramic coating device for the inner wall of an irregular narrow and long flow channel, characterized in that: The invention comprises a guide frame (1), a feeding tray (2), an outer contour elastic support (3), a rubber roller (4) and a dead angle scraping block (5); the feeding tray (2) and the rubber roller (4) are both mounted on the outer contour elastic support (3), and the dead angle scraping block (5) is installed on both sides of the bottom of the outer contour elastic support (3); the feeding tray (2) is in contact with and connected to the rubber roller (4) and the dead angle scraping block (5), respectively, and the rubber roller (4) and the dead angle scraping block (5) are in contact with and connected to the inner wall of the flow channel, respectively; the feeding tray (2) is connected to the guide frame (1) via a PVC elastic pipe, and the guide frame (1) is artificially controlled to move on the inner wall of the flow channel via the PVC elastic pipe; the guide frame (1) moves on the inner wall of the flow channel, driving the outer contour elastic support (3) to move on the inner wall of the flow channel, thereby driving the rubber roller (4) to move in the flow channel.

2. The device for applying ceramic coating to the inner wall of an irregular narrow and long flow channel according to claim 1, characterized in that: The feeding tray (2) comprises a dead angle feeding port (201), a first feeding through hole (202), a second feeding through hole (203), a feeding pipe (204), a feeding trough (205), a third feeding through hole (206) and a feeding channel (207); the dead angle feeding port (201) is located on both sides of the first feeding through hole (202) and the second feeding through hole (203); the feeding pipe (204) is connected to the feeding channel (207), and the feeding The channel (207) is connected to the feed trough (205) through the third feed through hole (206), and the first feed through hole (202) and the second feed through hole (203) are respectively connected to the adjacent feed channels (207); the dead corner feed port (201) is in contact with the dead corner scraping block (5) through the rounded slide structure, and the feed trough (205) is in contact with the rubber roller (4); and the feed pipe (204) is connected to the PVC elastic pipe.

3. The device for applying ceramic coating to the inner wall of an irregular narrow and long flow channel according to claim 1, characterized in that: The outer contour elastic support (3) comprises an elastic support (301), a rubber roller bearing (302) and a positioning block (303) mounted on the elastic support (301); the dead angle scraping blocks (5) are mounted on both sides of the bottom of the elastic support (301); the elastic support (301) is an arched elastic structure; the rubber roller (4) is mounted on the elastic support (301) via the rubber roller bearing (302); the rubber roller (4) is longitudinally arranged on the elastic support (301), and the positioning block (303) positions the longitudinally arranged rubber roller (4).

4. The device for applying ceramic coating to the inner wall of an irregular narrow and long flow channel according to claim 3, characterized in that: The elastic supports (301) are arranged in a staggered manner.

5. The device for applying ceramic coating to the inner wall of an irregular narrow and long flow channel according to claim 1, characterized in that: The guide frame (1) comprises a first guide wheel frame (6), a second guide wheel frame (7), a guide wheel (8) and a guide wheel frame support (10); the first guide wheel frame (6) is installed on the bottom of the guide wheel support (10) via a spring shaft (9), and the second guide wheel frame (7) is fixedly installed on the front; the guide wheel (8) is installed on the first guide wheel frame (6) and the second guide wheel frame (7); the spring shaft (9) cooperates with the first guide wheel frame (6) to make the guide wheel (8) abut against the inner wall of the flow channel, thereby fixing the guide frame (1) on the inner wall of the flow channel; the guide frame (1) is in rigid contact with the first feeding tray (2) connected thereto.

6. The device for applying ceramic coating to the inner wall of an irregular narrow and long flow channel according to claim 5, characterized in that: The outer contour of the guide frame (1) is substantially consistent with that of the feeding tray (2).

7. The device for applying ceramic coating to the inner wall of an irregular narrow and long flow channel according to claim 2, characterized in that: The feed pipe (204) is connected to an external feeder via a PVC pipe; the feeder comprises a feed nozzle (11), a material barrel (12) and a feed mechanism (13); the material barrel (12) is filled with paint, the material barrel (12) is connected to the feed mechanism (13), and the feed mechanism (13) is connected to the feed nozzle (11); the material passage (12) is used to heat the paint at a constant temperature; the feed mechanism (13) is used to feed the paint into the feed pipe (204) via the feed nozzle (11) and the PVC pipe by means of electric pressure.

8. The device for applying ceramic coating to the inner wall of an irregular narrow and long flow channel according to claim 7, characterized in that: The feeder also includes a handle (14); the handle (14) is installed on the feeding mechanism (13).

9. The device for applying ceramic coating to the inner wall of an irregular narrow and long flow channel according to claim 1, characterized in that: The rubber roller (4) is a three-layer rubber roller.

10. The device for coating the inner wall of an irregular narrow channel with a ceramic coating according to claim 9, wherein The feature is that the rubber roller (4) comprises a rubber surface (402); an inflation valve (401) is provided on the rubber surface (402); The rubber surface (402) is made of oleophobic material.

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