CN113171915A

CN113171915A - Painting device

Info

Publication number: CN113171915A
Application number: CN202110452567.2A
Authority: CN
Inventors: 王振宇; 张宁
Original assignee: China 22MCC Group Corp Ltd; Beijing Tianrun Construction Co Ltd
Current assignee: China 22MCC Group Corp Ltd; Beijing Tianrun Construction Co Ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-07-27

Abstract

The invention belongs to the technical field of building construction, and discloses a squeegee, which comprises a walking component and a spraying component, wherein the walking component comprises a walking arm and a walking wheel rotationally arranged on the walking arm, the spraying component comprises a rotating arm and a brush head which are connected, the rotating arm is connected with the walking arm, the rotating arm is driven to rotate relative to the walking arm along the axial direction of a pipeline, so that the brush head connected with the rotating arm can be coated along the circumferential direction of the inner wall of the pipeline, the walking arm is driven to move along the axial direction of the pipeline, the rotating arm moves along with the walking arm under the driving of the walking arm, and the brush head can uniformly coat paint on the inner wall of the pipeline along. The length of walking arm and swinging boom is adjustable, before the use, can be according to the diameter adjustment walking arm of the pipeline of treating applying paint with a brush and the length of swinging boom, and it is put into the pipeline again and applies paint the operation with a brush, and the commonality of this brush application device is strong, can be applicable to the pipeline inner wall of multiple size and apply paint the operation with a brush in, reduces the model quantity of brush application device, reduces the engineering spending.

Description

Painting device

Technical Field

The invention relates to the technical field of building construction, in particular to a squeegee.

Background

The arrangement and construction of pipeline lines are important links in building construction. The constructed pipeline can be used for water supply, water drainage, heat supply, long-distance petroleum and natural gas transportation, agricultural irrigation and various industrial equipment. The inner and outer surfaces of the pipe are typically coated with a protective layer to prevent the inner and outer surfaces of the pipe from rusting or corroding, thereby extending the service life of the pipe. The construction of paining of pipeline lateral wall is comparatively convenient, and the construction of paining of pipeline inside wall is comparatively difficult, for improving the efficiency of construction and avoid ventilating in the pipeline not good and cause the incident, the pipeline construction stage at present uses in the ware entering pipeline of applying paint with a brush usually to apply paint the protective layer with a brush to the inside wall of pipeline.

However, the diameters of pipelines in construction of various projects are different, the existing squeegee cannot be suitable for painting the inner side walls of pipelines with various sizes, the universality is poor, and the squeegee with various sizes is needed in construction, so that the production cost is seriously increased.

Disclosure of Invention

The invention aims to provide a squeegee which can be suitable for painting operation of the inner walls of pipelines with various sizes, has strong universality, reduces the number of models of the squeegee and reduces the engineering expenditure.

In order to achieve the purpose, the invention adopts the following technical scheme:

an applicator, comprising:

the walking assembly comprises a walking arm and a walking wheel rotatably arranged on the walking arm, the walking arm can move along the axial direction of the pipeline, the walking wheel is in rolling fit with the inner wall of the pipeline, and the length of the walking arm is adjustable;

the spraying subassembly, including the swinging boom and the brush head that link to each other, the swinging boom with the walking arm is connected, the swinging boom can wind the axial of pipeline is relative the walking arm rotates, so that brush head paint coating in the inner wall of pipeline, the length of swinging boom is adjustable.

As a preferable scheme of the squeegee provided by the invention, the walking assembly further comprises an installation frame arranged along the axial direction of the pipeline, the walking arms are provided with a plurality of groups, the plurality of groups of walking arms are arranged at intervals along the axial direction of the installation frame, the plurality of walking arms in each group are circumferentially distributed by taking the installation frame as the center, and each walking arm is correspondingly provided with one walking wheel.

As a preferable scheme of the squeegee provided by the invention, the spraying component further includes a transmission shaft, the transmission shaft is rotatably connected to the mounting frame, the plurality of rotating arms are symmetrically distributed around the transmission shaft, and each rotating arm is correspondingly provided with one brush head.

As a preferable aspect of the squeegee provided by the present invention,

the walking arm comprises a first arm body and a first elastic compression piece, the walking wheel is arranged on the first arm body, and the first arm body is connected to the mounting frame through the first elastic compression piece;

the rotating arm comprises a second arm body and a second elastic compression piece, the brush head is arranged on the second arm body, and the second arm body is connected to the transmission shaft through the second elastic compression piece.

As a preferable aspect of the squeegee provided by the present invention, each of the first elastic compression member and the second elastic compression member includes a compression spring.

As a preferable scheme of the squeegee provided by the present invention, the spraying component further includes a driving component, a housing of the driving component is disposed on the mounting frame, an output end of the driving component is connected to the transmission shaft, and the driving component drives the transmission shaft to rotate, so that the rotating arm rotates around an axial direction of the pipe.

As a preferable scheme of the squeegee provided by the invention, the spraying component further includes a material pumping component and a material guide pipe, an inner cavity of the material pumping component is communicated with the material guide pipe, and the material pumping component can pump the paint to the material guide pipe, so that the paint is sprayed on the inner wall of the pipeline through a spray opening of the material guide pipe.

As a preferable scheme of the squeegee provided by the invention, the jet orifice of the material guide pipe is positioned between the rotating arm and the material pumping component, and the walking component is positioned on one side of the jet orifice, which is far away from the rotating arm.

The preferable scheme of the squeegee provided by the invention further comprises a traction assembly, wherein the traction assembly is used for driving the walking assembly to move along the axial direction of the pipeline.

The preferable scheme of the squeegee provided by the invention further comprises a drying component, and the drying component is used for drying the coating coated on the inner wall of the pipeline.

The invention has the beneficial effects that:

the invention provides a squeegee, comprising a walking component and a spraying component, wherein the walking component comprises a walking arm and a walking wheel rotationally arranged on the walking arm, the spraying component comprises a rotating arm and a brush head which are connected, the rotating arm is connected with the walking arm, when the inner wall of a pipeline needs to be brushed, the squeegee is placed in the pipeline to be brushed, firstly, the rotating arm is driven to rotate relative to the walking arm along the axial direction of the pipeline, so that the brush head connected with the rotating arm can be smeared along the circumferential direction of the inner wall of the pipeline, then the walking arm is driven to move along the axial direction of the pipeline, at the moment, the walking wheel is in rolling fit with the inner wall of the pipeline, the resistance overcome when the walking arm moves can be reduced, the rotating arm moves along with the walking arm under the driving of the walking arm, so that the brush head moves along the axial direction of the pipeline, namely, the brush head can rotate along the axial direction of the pipeline, and can move along the length direction of the pipeline simultaneously, along with the movement of the walking arm, the brush head can uniformly paint the coating on the inner wall of the pipeline. The length of walking arm and swinging boom is adjustable, before the use, can be according to the diameter adjustment walking arm of the pipeline of waiting to apply paint with a brush and the length of swinging boom, puts into the pipeline again and applies paint with a brush the operation with a brush, the turning radius of swinging boom and the pipeline looks adaptation of waiting to apply paint with a brush to make the brush head can evenly paint the inner wall of pipeline. Through setting up length adjustable walking arm and swinging boom, can improve the commonality of brush applicator, make it be applicable to the pipeline inner wall of multiple size and apply paint the operation with a brush, reduce the model quantity of brush applicator, reduce the engineering spending.

Drawings

FIG. 1 is a front view of an applicator according to an embodiment of the present invention;

fig. 2 is a right side view of an applicator according to an embodiment of the present invention.

In the figure:

1-a walking component; 2-a spray assembly; 3-a traction assembly;

11-a walking arm; 12-a travelling wheel; 13-a mounting frame;

21-a rotating arm; 22-a brush head; 23-a drive shaft; 24-a drive assembly; 25-a material pumping assembly; 26-a material guide pipe;

111-a first arm body; 112-a first resilient compression member;

211-a second arm body; 212-a second resilient compression member;

261-jet orifice;

100-pipeline.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and 2, the present embodiment provides a squeegee including a walking assembly 1 and a spraying assembly 2.

The walking assembly 1 comprises a walking arm 11 and a walking wheel 12 rotatably arranged on the walking arm 11. Spray assembly 2 includes an associated swivel arm 21 and brush head 22. The rotating arm 21 is connected to the traveling arm 11. When it is required to paint the inner wall of the pipe 100, the squeegee is placed in the pipe 100 to be painted, and first, the rotating arm 21 is driven to rotate around the axial direction of the pipe 100 relative to the traveling arm 11, so that the brush head 22 connected to the rotating arm 21 can be painted along the circumferential direction of the inner wall of the pipe 100. The walking arm 11 is then driven to move along the axial direction of the pipeline 100, at this time, the walking wheel 12 is in rolling fit with the inner wall of the pipeline 100, the resistance overcome when the walking arm 11 moves can be reduced, and the rotating arm 21 is driven by the walking arm 11 to move along with the walking arm, so that the brush head 22 moves along the axial direction of the pipeline 100. That is, the brush head 22 can rotate in the axial direction of the pipe 100 and move in the longitudinal direction of the pipe 100. Therefore, the brush head 22 can uniformly apply the paint to the inner wall of the duct 100 as the traveling arm 11 moves. The lengths of the walking arm 11 and the rotating arm 21 are adjustable, before the brush head is used, the lengths of the walking arm 11 and the rotating arm 21 can be adjusted according to the diameter of a pipeline 100 to be brushed, then the pipeline 100 is placed into the brush head for brushing, and the rotating radius of the rotating arm 21 is matched with the pipeline 100 to be brushed, so that the brush head 22 can be used for uniformly brushing the inner wall of the pipeline 100. By arranging the length-adjustable walking arm 11 and the rotating arm 21, the universality of the squeegee can be improved, so that the squeegee is suitable for the inner wall painting operation of pipelines 100 with various sizes, the number of models of the squeegee is reduced, and the engineering expenditure is reduced.

Referring to fig. 1, the walking assembly 1 optionally further comprises a mounting frame 13. The mounting bracket 13 is provided along the axial direction of the pipe 100 for mounting the traveling arm 11. The walking arms 11 are provided with a plurality of groups, the groups of walking arms 11 are arranged along the axial direction of the mounting rack 13 at intervals, the walking arms 11 in each group are circumferentially distributed by taking the mounting rack 13 as the center, and each walking arm 11 is correspondingly provided with a walking wheel 12. When the walking assembly 1 is driven, each walking arm 11 moves along the inner wall of the pipeline 100 through the walking wheels 12, and by arranging a plurality of groups of walking arms 11, the motion stability can be increased, and the painting quality is improved. In addition, a plurality of walking arms 11 circumference evenly distributed in every group is on mounting bracket 13 for a plurality of walking arms 11 can fully support whole brush applicator, take place great rocking when avoiding this brush applicator along pipeline 100 axial displacement, guarantee that coating can evenly be applied paint on the inner wall of pipeline 100.

Referring to fig. 1 and 2, in the present embodiment, two sets of walking arms 11 are provided, each set includes three walking arms 11, and the three walking arms 11 are uniformly distributed circumferentially around the mounting frame 13. Of course, in other embodiments, the number and distribution of the walking arms 11 may be specifically selected according to actual construction requirements, and are not specifically limited herein.

Preferably, the mounting frame 13 comprises a steel pipe extending along the circumference of the pipeline 100, and the traveling arm 11 is connected to the steel pipe. The steel pipe has higher intensity and rigidity, can satisfy the construction requirement, and the steel pipe is hollow, does benefit to the weight reduction of whole brush applicator.

Referring to fig. 1, optionally, the spray assembly 2 further comprises a drive shaft 23. The transmission shaft 23 is rotatably connected to the mounting bracket 13. The number of the rotating arms 21 is multiple, the rotating arms 21 are symmetrically distributed by taking the transmission shaft 23 as a center, and each rotating arm 21 is correspondingly provided with one brush head 22. The transmission shaft 23 is arranged along the axial direction of the pipeline 100, and the rotating arm 21 is parallel to the walking arm 11 and extends along the radial direction of the pipeline 100. Through setting up a plurality of swinging boom 21 and brush head 22, when swinging boom 21 was rotatory, a plurality of brush heads 22 can be fully paintd along pipeline 100's circumference, avoid leaving the vacancy, guarantee to brush head 22 and can paint every corner of pipeline 100, improve and apply paint quality and degree of consistency with a brush.

Referring to fig. 2, in the present embodiment, two rotating arms 21 are provided. The two rotating arms 21 are located on the same line. Of course, the number of the rotating arms 21 may be three or four, and the like, and may be determined according to the traveling speed of the traveling arm 11, and the like, and is not particularly limited herein.

Preferably, the brush head 22 is detachably connected with the rotating arm 21, so that the cleaning and maintenance are convenient, and the brush head 22 can be replaced with a new one after being damaged.

Referring to fig. 1, the traveling arm 11 includes a first arm body 111 and a first elastic compression member 112. The traveling wheel 12 is rotatably disposed on the first arm body 111, and the first arm body 111 is connected to the mounting frame 13 through a first elastic compression member 112. The length of the traveling arm 11 can be changed by compressing the first elastic compression member 112 so that it is suitable for use in painting operations of pipes 100 having different diameters. Likewise, the rotating arm 21 includes a second arm body 211 and a second elastic compression member 212. The brush head 22 is disposed on the second arm body 211, and the second arm body 211 is connected to the transmission shaft 23 through the second elastic compression member 212. The length of the rotating arm 21 can be adjusted by compressing the second elastic compression member 212 so that it is suitable for use in painting operations of pipes 100 of different diameters. When painting the inner wall of the pipe 100, the first elastic compression member 112 and the second elastic compression member 212 need to be compressed first to adjust the lengths of the traveling arm 11 and the rotating arm 21, so that the squeegee can be smoothly placed inside the pipe 100. Then, the walking wheels 12 and the brush head 22 are pressed against the inner wall of the duct 100 by the elastic force of the first and second

elastic compression members

112 and 212, respectively. That is, walking arm 11 is along pipeline 100 axial displacement and the rotatory in-process of swinging boom 21, and walking wheel 12 and brush head 22 all push up the inner wall of pipeline 100, and the stationarity when effectively improving walking subassembly 1 and removing avoids producing great rocking applying paint the in-process with a brush, guarantees to brush head 22 and pipeline 100's inside full contact all the time, improves the reliability of applying paint the operation with a brush.

In other embodiments of the present invention, in order to realize the length adjustment of the walking arm 11 and the rotating arm 21, the walking arm 11 and the rotating arm 21 may also be configured to be a telescopic structure or a folding structure. Illustratively, the traveling arm 11 includes a telescopic rod and a telescopic tube, the telescopic tube is connected to the mounting frame 13, the traveling wheel 12 is rotatably disposed on the telescopic rod, and the telescopic rod is adjustably connected in the telescopic tube. The whole length of the walking arm 11 can be adjusted by adjusting the position of the telescopic rod in the telescopic pipe, and the telescopic rod and the telescopic pipe can be formally used after being fixed.

Preferably, both ends of the first elastic compression member 112 are detachably connected to the first arm body 111 and the mounting bracket 13, respectively. Both ends of the second elastic compression member 212 are detachably connected to the second arm body 211 and the transmission shaft 23, respectively. Replacement is facilitated when the deformability of the first resilient compression member 112 and the second resilient compression member 212 is reduced.

Preferably, the first resilient compression member 112 and the second resilient compression member 212 each comprise a compression spring. The compression spring can bear axial pressure, and when the compression spring is subjected to external load, the compression spring contracts and deforms, and elastic potential energy is stored. The compression spring is convenient to obtain materials, low in manufacturing cost and capable of reducing production cost.

Referring to fig. 1, the spray assembly 2 further includes a drive assembly 24. The housing of the drive assembly 24 is disposed on the mounting bracket 13. The output of the drive assembly 24 is connected to the drive shaft 23. The driving assembly 24 is activated to drive the transmission shaft 23 to rotate around its own axis, and the rotating arm 21 is driven by the transmission shaft 23 to rotate along with it, so as to drive the brush head 22 at the end of the rotating arm 21 to smear along the circumference of the pipeline 100.

With continued reference to fig. 1, the spray assembly 2 further includes a draw assembly 25 and a conduit 26. The inner cavity of the material pumping assembly 25 is communicated with a material guide pipe 26. After the traveling assembly 1 and the rotating arm 21 are placed in the pipeline 100 and the rotating arm 21 is driven to rotate, the material pumping assembly 25 is started, the material pumping assembly 25 pumps the paint into the material guide pipe 26, and the paint in the material guide pipe 26 is sprayed out through the spraying opening 261 under the high pressure of the material pumping assembly 25. The injection port 261 faces the inner wall of the duct 100 so that the coating can be finally injected to the inner wall of the duct 100. The rotating brush head 22 is capable of spreading the paint evenly on the inner wall of the conduit 100. In other embodiments, the coating may also be extruded through head 22, with the extruded coating then being applied to the inner wall of conduit 100 by head 22.

Further, the pumping assembly 25 is preferably a pumping pump, and has high transmission power, safety and reliability. The material guiding pipe 26 is preferably a flexible pipe with certain deformability, and the operation is convenient when the material guiding pipe 26 is connected with the material pumping assembly 25. The coating can be liquid such as anticorrosive paint or antirust oil, and can protect the inner wall of the pipeline 100.

Referring to fig. 1, preferably, the injection port 261 of the material guiding pipe 26 is located between the rotating arm 21 and the drawing member 25, and the traveling member 1 is located on a side of the injection port 261 away from the rotating arm 21. That is, the rotating arm 21, the injection port 261 of the material guide 26, and the traveling unit 1 are provided in this order along the moving direction of the squeegee in the pipe 100. The rotating arm 21 is disposed in front of the injection port 261, and when the traveling unit 1 is pulled backward, the coating is injected to each portion of the inner wall of the pipe 100, and then the brush head 22 is brushed through the portion, thereby ensuring the brushing uniformity. The jet orifice 261 of the material guide pipe 26 is arranged at the front side of the traveling assembly 1, so that when the traveling assembly 1 is pulled backwards, the traveling wheels 12 can be prevented from being infected with the paint sprayed on the inner wall of the pipeline 100, the traveling wheels 12 can be prevented from rolling over the coated pipe wall to leave ruts, and the coating is guaranteed to be even and flat.

Optionally, a pulling assembly 3 is attached to the mounting frame 13. The traction assembly 3 is used for driving the walking assembly 1 to move along the axial direction of the pipeline 100. The running assembly 1 can be pulled to move along the axial direction of the pipeline 100 by the traction assembly 3. Preferably, the traction assembly 3 includes a steel wire rope, which has certain strength and deformability, is not easily broken when pulled, and can be adaptively deformed when the walking assembly 1 passes through the curved portion of the pipeline 100, thereby facilitating the operation.

Preferably, the squeegee further comprises a drying assembly. The drying assembly is used to dry the paint coated on the inner wall of the duct 100. After the brush head 22 uniformly coats the coating on the inner wall of the pipeline 100, the drying component can accelerate the air drying of the coating, so that the coating is quickly attached to the inner wall of the pipeline 100, and the coating is prevented from being scratched due to too low air drying speed of the coating. The drying component can be a fan, and can accelerate air flow to quickly evaporate the coating to dryness.

The specific working process of the squeegee provided by the embodiment is as follows: the first elastic compression member 112 and the second elastic compression member 212 are first compressed to adjust the lengths of the traveling arm 11 and the rotating arm 21, thereby smoothly putting the traveling assembly 1 and the rotating arm 21 at the front side into one end of the pipe 100 to be painted. Subsequently, the driving assembly 24 is activated to drive the transmission shaft 23 to rotate, and the rotating arm 21 and the brush head 22 at the end of the rotating arm 21 rotate accordingly. Then, the drawing member 25 delivers the paint into the guide tube 26, and the paint in the guide tube 26 is sprayed on the inner wall of the pipe 100 through the spraying opening 261 of the guide tube 26. And finally, the traction assembly 3 pulls the walking assembly 1 to move axially along the pipeline 100 at a constant speed until the walking assembly 1 drives the rotating arm 21 to move to the other end of the pipeline 100, so that the painting operation on the inner wall of the pipeline 100 can be completed.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An applicator, comprising:

the walking assembly (1) comprises a walking arm (11) and a walking wheel (12) rotatably arranged on the walking arm (11), the walking arm (11) can move along the axial direction of the pipeline (100), the walking wheel (12) is in rolling fit with the inner wall of the pipeline (100), and the length of the walking arm (11) is adjustable;

spraying subassembly (2), including the rotating arm (21) and the brush head (22) that link to each other, rotating arm (21) with walking arm (11) are connected, rotating arm (21) can wind the axial of pipeline (100) is relative walking arm (11) rotate, so that brush head (22) paint coating in the inner wall of pipeline (100), the length of rotating arm (21) is adjustable.

2. An applicator according to claim 1, wherein the travelling assembly (1) further comprises a mounting frame (13) arranged along the axial direction of the pipeline (100), the travelling arms (11) are provided with a plurality of groups, the plurality of groups of travelling arms (11) are arranged at intervals along the axial direction of the mounting frame (13), the plurality of travelling arms (11) in each group are circumferentially distributed by taking the mounting frame (13) as the center, and each travelling arm (11) is correspondingly provided with one travelling wheel (12).

3. An applicator according to claim 2, wherein the spray assembly (2) further comprises a transmission shaft (23), the transmission shaft (23) is rotatably connected to the mounting frame (13), the plurality of rotary arms (21) are provided, the plurality of rotary arms (21) are symmetrically distributed around the transmission shaft (23), and each rotary arm (21) is provided with one corresponding brush head (22).

4. An applicator according to claim 3,

the walking arm (11) comprises a first arm body (111) and a first elastic compression piece (112), the walking wheel (12) is arranged on the first arm body (111), and the first arm body (111) is connected to the mounting frame (13) through the first elastic compression piece (112);

the rotating arm (21) comprises a second arm body (211) and a second elastic compression piece (212), the brush head (22) is arranged on the second arm body (211), and the second arm body (211) is connected to the transmission shaft (23) through the second elastic compression piece (212).

5. An applicator according to claim 4, wherein the first resilient compression member (112) and the second resilient compression member (212) each comprise a compression spring.

6. An applicator according to claim 3, characterized in that the spray assembly (2) further comprises a drive assembly (24), the housing of the drive assembly (24) being arranged on the mounting frame (13), the output end of the drive assembly (24) being connected to the drive shaft (23), the drive assembly (24) being adapted to rotate by driving the drive shaft (23) so as to rotate the rotary arm (21) about the axial direction of the pipe (100).

7. An applicator according to claim 1, wherein the spray assembly (2) further comprises a suction assembly (25) and a guide tube (26), the inner cavity of the suction assembly (25) is communicated with the guide tube (26), the suction assembly (25) can suck the paint into the guide tube (26) so that the paint is sprayed on the inner wall of the pipe (100) through the spraying opening (261) of the guide tube (26).

8. An applicator according to claim 7, wherein the jet orifice (261) of the material guide tube (26) is located between the rotating arm (21) and the material pumping assembly (25), and the walking assembly (1) is located on the side of the jet orifice (261) away from the rotating arm (21).

9. An applicator according to any one of claims 1 to 8, further comprising a traction assembly (3), the traction assembly (3) being adapted to drive the travelling assembly (1) in axial movement along the pipe (100).

10. An applicator according to any one of claims 1 to 8, further comprising a drying assembly for drying the paint applied to the inner wall of the conduit (100).