CN218555058U - Pipeline inner wall rust removing equipment - Google Patents

Abstract

The application relates to the field of pipeline rust removal, and particularly discloses pipeline inner wall rust removal equipment which is used for removing iron rust on the inner wall of a metal pipeline and comprises a machine base, a laser generator and a plurality of driving devices, wherein a vortex threaded disc which can rotate around a first axis relative to the machine base is arranged on the machine base, a plurality of clamping jaws are meshed and connected to the vortex threaded disc, and the clamping jaws can reciprocate along the radial direction of the vortex threaded disc when the vortex threaded disc rotates; one end of the clamping jaw, which is far away from the first axis, is provided with a roller which is attached to the inner wall of the pipeline and can roll along the axial direction of the inner wall of the pipeline; the laser generator is rotatably arranged on the end face of the machine base, which is far away from the clamping jaw along the axial direction of the inner wall of the pipeline, and can rotate around a first axis; the laser generator is used for generating laser emitted along the radial direction of the inner wall of the pipeline; the laser derusting machine has the advantages that the inner wall derusting is realized without chemical reagents, the environmental pollution is reduced, and the derusting efficiency is improved.

Description

Pipeline inner wall rust cleaning equipment

Technical Field

The utility model relates to a pipeline rust cleaning field, concretely relates to pipeline inner wall rust cleaning equipment.

Background

For enterprises using metal pipelines as raw materials for production and manufacturing, the metal pipelines are stocked in advance before production and manufacturing, and after the metal pipelines are exposed in air with certain humidity for a long time, the inside and the outside of the metal pipelines are prevented from generating rust; for the rust on the outer wall of the metal pipeline, a lathe can be used for removing a rust layer by cutting, but the method cannot be applied to rust removal on the inner wall of the metal pipeline, so for the rust on the inner wall of the metal pipeline, in the prior art, a rust remover is generally poured into the inner wall of the metal pipeline or the metal pipeline is directly soaked in the rust remover to remove rust, however, the method can generate a large amount of waste liquid (including the waste liquid of the rust remover and the waste liquid generated by repeatedly washing the metal pipeline) to pollute the environment, and the treated metal pipeline needs to be drained for a long time; obviously has the disadvantages of serious pollution and low efficiency.

Accordingly, the prior art is in need of improvement and development.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a pipeline inner wall rust cleaning equipment, need not to utilize chemical reagent just to realize the inner wall rust cleaning, has reduced environmental pollution and has improved rust cleaning efficiency simultaneously.

The technical scheme of the application is as follows:

a pipe inner wall rust removing apparatus for cleaning rust on an inner wall of a metal pipe, comprising:

the device comprises a base, a first shaft, a second shaft, a first shaft and a second shaft, wherein a vortex threaded disc capable of rotating around a first axis relative to the base is arranged on the base; one end of the clamping jaw, which is far away from the first axis, is provided with a roller which is attached to the inner wall of the pipeline and can roll along the axial direction of the inner wall of the pipeline;

the laser generator is rotatably arranged on the end face of the machine base on one side far away from the clamping jaw along the axial direction of the inner wall of the pipeline and can rotate around the first axis; the laser generator is used for generating laser emitted along the radial direction of the inner wall of the pipeline;

a first drive means mounted on said housing for driving said scroll wrap to rotate about said first axis;

the second driving device is arranged on the base and is used for driving the laser generator to rotate around the first axis;

and the third driving device is arranged on the base and is used for driving the roller to rotate.

The application provides a pipeline inner wall rust cleaning equipment, through carrying laser generator along metal pipeline's inner wall walking, thereby walking in-process laser generator sends laser and detach the iron rust of metal pipeline inner wall, and the processing procedure does not have any waste liquid and produces, and metal pipeline also can directly be applied to the manufacturing after the rust cleaning is accomplished.

Further, the first driving device comprises a driving motor and a first rotating shaft, the driving motor is connected with the first rotating shaft, and the first rotating shaft is in key connection with the vortex threaded disk; the driving motor is right opposite to the center of the vortex threaded disc; the driving motor with be connected with the mount between the frame just the mount will the driving motor frame leave in the frame is close to in driving motor's surface.

The driving motor is arranged in the center of the vortex threaded disc and is in key connection with the vortex threaded disc, so that the structure is simple and the assembly and disassembly are convenient; meanwhile, the fixing frame is arranged, so that the driving motor is further fixed on the base, and the driving motor is prevented from obstructing the jaw from moving along the radial direction.

Furthermore, the laser generator comprises a telescopic device and a laser head, the telescopic device is connected with the laser head, and the telescopic device is rotatably arranged on the machine base so as to enable the telescopic device to rotate around the first axis; the telescopic device is used for driving the laser head to reciprocate along the radial direction of the inner wall of the pipeline.

Set up telescoping device and be favorable to making the laser head can both be close to the pipeline inner wall in the pipeline of different pipe diameters, can ensure that the laser beam is more concentrated, avoids the laser energy fruitage extravagant.

Further, the telescopic device comprises:

the fixing part is rotationally arranged on the base so as to enable the fixing part to rotate around the first axis; a second rotating shaft extending along the radial direction of the inner wall of the pipeline is arranged in the fixing part, and the second rotating shaft can rotate around a second axis of the second rotating shaft relative to the fixing part; the second rotating shaft is provided with a threaded through hole extending along the second axis;

the moving part comprises a screw rod extending along the radial direction of the inner wall of the pipeline, and the screw rod is inserted in the threaded through hole and is in threaded connection with the threaded through hole; the laser head is arranged at the end part of the screw rod;

and the fourth driving device is used for driving the second rotating shaft to rotate around the second axis so as to enable the second rotating shaft to drive the screw rod to reciprocate along the length direction of the second axis.

The lead screw can realize more stable transmission, is favorable to the laser head to remove along radial direction stability, and the lead screw can realize more meticulous position control simultaneously, is favorable to the user to realize the fine setting to the position of laser head.

Furthermore, the fixing part is also provided with two positioning through holes extending along the radial direction of the inner wall of the pipeline;

the moving part also comprises two positioning rods extending along the radial direction of the inner wall of the pipeline, and the two positioning rods are connected with the laser head;

each positioning through hole is correspondingly inserted with one positioning rod, so that the second rotating shaft stably drives the screw rod to reciprocate along the length direction of the second axis.

Furthermore, the length of the screw rod is the same as that of the two positioning rods, and the length of the screw rod and the length of the two positioning rods are greater than that of the fixing part.

Further, the laser head includes transmitting terminal and base, the transmitting terminal rotates to set up on the base, so that the transmitting terminal can be rotatory around a third axis.

The utility model has the advantages that: the laser can effectively remove rust on the metal surface, the pipeline inner wall rust removing equipment carries the laser generator to walk in the inner wall of the metal pipeline, and meanwhile, the laser generator is driven to rotate around the first axis in a matched mode, so that the laser beam can cover the inner wall of the metal pipeline along the circumferential surface, and rust on all parts of the inner wall of the whole metal pipeline can be removed; the derusting process does not need any chemical reagent, so that no waste liquid is generated to pollute the environment, and the metal pipeline can be put into production without waiting for draining after the derusting is finished.

Drawings

Fig. 1 is a schematic structural diagram of one of viewing angles of a pipeline inner wall rust removal device provided by an embodiment of the application.

Fig. 2 is a schematic structural diagram of another view angle of a pipeline inner wall rust removing device provided by an embodiment of the application.

Fig. 3 is an exploded view of a part of a rust removing apparatus for an inner wall of a pipeline according to an embodiment of the present application.

Fig. 4 is an exploded view of another part of a pipeline inner wall rust removing apparatus according to an embodiment of the present application.

Fig. 5 is a partial structural diagram marked by a in fig. 4.

Fig. 6 is a schematic view of a portion of the structure labeled b in fig. 4.

Fig. 7 is a schematic view of a portion of the structure labeled c in fig. 4.

Fig. 8 is a schematic view of a portion of the structure labeled d in fig. 4.

Fig. 9 is a schematic view of a pipeline inner wall rust removing apparatus according to an embodiment of the present application, as viewed from the front in the axial direction of the pipeline, when the apparatus is disposed in the pipeline.

Fig. 10 is a schematic view of a pipeline half-sectioned along the axial direction of the pipeline when the pipeline inner wall rust removal device according to the embodiment of the application is arranged in the pipeline.

Description of reference numerals:

100. a machine base; 110. a scroll threaded disk; 120. a jaw; 130. a roller; 140. a fixed mount; 150. an infrared sensor; 200. a laser generator; 210. a laser head; 211. a transmitting end; 212. a base; 221. a fixed part; 222. a second rotating shaft; 223. a threaded through hole; 224. a screw rod; 225. positioning the through hole; 226. positioning a rod; 310. a drive motor; 320. a first rotating shaft.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

In certain embodiments, referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 9 and fig. 10, a pipeline inner wall rust removing apparatus for removing rust on an inner wall of a metal pipeline, includes:

the scroll compressor comprises a base 100, wherein a scroll threaded disc 110 which can rotate around a first axis relative to the base 100 is arranged on the base 100, a plurality of clamping jaws 120 are engaged and connected on the scroll threaded disc 110, and the clamping jaws 120 can reciprocate along the radial direction of the scroll threaded disc 110 when the scroll threaded disc 110 rotates; a roller 130 which is attached to the inner wall of the pipeline and can roll along the axial direction of the inner wall of the pipeline is arranged at one end, far away from the first axis, of the clamping jaw 120;

the laser generator 200 is rotatably arranged on the end face of the base 100 far away from the claw 120 along the axial direction of the inner wall of the pipeline, and the laser generator 200 can rotate around a first axis; the laser generator 200 is used for generating laser emitted along the radial direction of the inner wall of the pipeline;

a first driving means mounted on the housing 100 and for driving the scroll 110 to rotate about a first axis;

a second driving device installed on the base 100 and used for driving the laser generator 200 to rotate around the first axis;

and a third driving device installed on the base 100 and used for driving the roller 130 to rotate.

In this embodiment, in practical application, a user places the pipeline inner wall rust removal device in a pipeline, and then controls the first driving device to drive the scroll threaded disc 110 to rotate (the base 100 remains stationary), and as the scroll threaded disc 110 rotates, the jaws 120 engaged therewith reciprocate in the radial direction, and the rollers 130 at the ends of the jaws 120 gradually extend in the radial direction and approach the inner wall of the pipeline, and finally attach to the inner wall of the pipeline, so as to fix the whole pipeline inner wall rust removal device in the pipeline (each jaw 120 moves synchronously, and under the condition that the dimensions of all the jaws 120 are consistent, the pipeline inner wall rust removal device is generally fixed on the center of the cross section of the pipeline in the radial direction), and because the jaws 120 have a certain stroke in the radial direction, the pipeline inner wall rust removal device can be applied to pipelines of various pipe diameters, and the applicability of the pipeline inner wall rust removal device is greatly increased; in practical application, after the clamping jaws 120 are close to the inner wall of the pipeline, the third driving device is controlled to drive the rollers 130 to roll along the axial direction of the pipeline, so as to drive the pipeline inner wall rust removal equipment to move in the pipeline.

After pipeline inner wall rust cleaning equipment is fixed in the pipeline, control starts laser generator 200 and makes it produce the laser beam ignition pipeline inside rust on, control second drive arrangement simultaneously drives laser generator 200 and rotates around the primary axis, make the laser beam can circumference cover the global of pipeline inner wall, after laser generator 200 rotatory round or many circles (predetermine by the user according to the actual demand), the rust cleaning has been accomplished to the global inner wall of this section pipeline that the laser beam was swept, third drive arrangement drive roller 130 rolls and removes to the next section of pipeline along the axial direction of pipeline in order to drive pipeline inner wall rust cleaning equipment this moment, the above-mentioned operation of repeated execution, accomplish the rust cleaning until whole pipeline inner wall.

It should be noted that the scroll 110 is a prior art, and is generally applied to a chuck of a lathe, and will not be described herein. In addition, the first axis refers to the central axis of the scroll 110, and when the pipeline inner wall rust removing device is located on the center of the section of the pipeline in the radial direction, the first axis coincides with the central axis of the pipeline, and the rotation of the laser generator 200 around the first axis is equivalent to the rotation of the laser generator 200 around the central axis of the pipeline.

In some embodiments, an infrared sensor 150 is further disposed on a side of the base 100 close to the laser generator 200, and the infrared sensor 150 is used for determining the number of rotations of the laser generator 200. Laser generator 200 is around the complete rotatory a week of first axis after, must pass through infrared inductor 150, thereby infrared inductor 150 responds to laser generator 200's position and sends the signal to control system, thereby make control system can add up laser generator 200's rotatory number of times and then reach behind the predetermined rotatory number of times (for example to the more pipeline inner wall of iron rust, the user can set for rotatory number of times and be 3, add up laser generator 200's rotatory 3 backs, then consider that the inner wall iron rust of this section pipeline has clear away completely) automatic control third drive arrangement drive roller 130 rolls and makes the next section of pipeline inner wall rust cleaning equipment removal pipeline.

It should be noted that the number of rotations of the light sensor 200 is not limited to the use of the infrared sensor 150, and a limit switch, a laser sensor, or the like may be used.

In certain embodiments, referring to fig. 1, 2 and 3, the first driving means comprises a driving motor 310 and a first rotating shaft 320, the driving motor 310 is connected with the first rotating shaft 320, and the first rotating shaft 320 is connected with the spiral threaded disk 110; drive motor 310 is centered with respect to scroll plate 110; the fixing frame 140 is connected between the driving motor 310 and the base 100, and the fixing frame 140 supports the driving motor 310 away from the surface of the base 100 close to the driving motor 310.

In this embodiment, the first rotating shaft 320 is inserted into the center of the spiral threaded plate 110 in a key connection manner, and the spiral threaded plate 110 rotates under the driving action of the driving motor 310, so that the key connection structure is simple and is convenient to assemble and disassemble; meanwhile, in order to prevent the driving motor 310 from affecting the movement of the jaws 120 in the radial direction, the driving motor 310 is further fixed on the base 100 by using the fixing frame 140; meanwhile, the surface of the base 100, which is separated from the driving motor 310 and close to the driving motor 310, i.e., the gap between the driving motor 310 and the base 100, is also beneficial to prevent the driving motor 310 from obstructing the movement of the jaws 120.

In some embodiments, referring to fig. 1, 2 and 4, the laser generator 200 includes a telescopic device and a laser head 210, the telescopic device is connected to the laser head 210, and the telescopic device is rotatably disposed on the base 100 so that the telescopic device can rotate around a first axis; the telescopic device is used for driving the laser head 210 to reciprocate along the radial direction of the inner wall of the pipeline.

In the embodiment, the laser beam is emitted from the laser head 210, when the laser head 210 is actually applied, the pipeline has various pipe diameters, if the laser head 210 is far away from the inner wall of the pipeline, the transmission path is too far, so that the laser beam is too dispersed, a large amount of laser energy is wasted, the laser energy falling on the inner wall of the pipeline is insufficient, the rust cannot be effectively removed, and the rust removing effect is influenced; therefore, in the embodiment, the laser head 210 is carried on the telescopic device, so that the laser head 210 can also move back and forth along the radial direction to be closer to the inner wall of the pipeline, the energy concentration of the laser beam is facilitated, and a better rust removing effect is realized.

In certain embodiments, referring to fig. 4, 5, 6, 7, 8, 9, and 10, a telescopic device comprises:

the fixing part 221 is rotatably arranged on the base 100, so that the fixing part 221 can rotate around a first axis; a second rotating shaft 222 extending along the radial direction of the inner wall of the pipeline is arranged in the fixing part 221, and the second rotating shaft 222 can rotate around a second axis of the second rotating shaft relative to the fixing part 221; the second rotating shaft 222 is provided with a threaded through hole 223 extending along the second axis;

the moving part comprises a screw rod 224 extending along the radial direction of the inner wall of the pipeline, and the screw rod 224 is inserted into the threaded through hole 223 and is in threaded connection with the threaded through hole 223; the laser head 210 is arranged at the end part of the screw rod 224;

and the fourth driving device is used for driving the second rotating shaft 222 to rotate around the second axis, so that the second rotating shaft 222 drives the screw rod 224 to reciprocate along the length direction of the second axis.

In this embodiment, the fourth driving device is controlled to drive the second rotating shaft 222 to rotate, so as to drive the screw rod 224 to reciprocate along the radial direction, and further drive the laser head 210 to approach or leave the inner wall of the pipeline; in addition, lead screw 224 has higher precision, is favorable to realizing still being favorable to realizing more meticulous position control outside more stable transmission, and convenience of customers finely tunes the distance between laser head 210 and the pipeline inner wall, avoids laser head 210 too close to the pipeline inner wall and leads to excessively firing the pipeline so that the pipeline is damaged, or avoids laser head 210 too far away from the laser ability that the pipeline inner wall leads to reaching the pipeline inner wall to be not enough to clear away the iron rust completely so that the rust cleaning effect is not good.

It should be noted that the second axis refers to a central axis of the second rotating shaft 222.

In some embodiments, referring to fig. 4, 5, 6, 7 and 8, the fixing portion 221 is further provided with two positioning through holes 225 extending along the radial direction of the inner wall of the pipe;

the moving part also comprises two positioning rods 226 extending along the radial direction of the inner wall of the pipeline, and both the two positioning rods 226 are connected with the laser head 210;

each positioning through hole 225 is correspondingly inserted with a positioning rod 226, so that the second rotating shaft 222 stably drives the screw rod 224 to reciprocate along the length direction of the second axis.

In this embodiment, the two positioning rods 226 can effectively prevent the second rotating shaft 222 from driving the screw rod 224 to rotate when rotating, so that the second rotating shaft 222 and the screw rod 224 are relatively stationary, and the screw rod 224 cannot normally move along the radial direction; meanwhile, the screw rod 224 can be accurately limited by the positioning rod 226, so that the central axis of the screw rod 224 is always parallel to the central axis of the second rotating shaft 222, and the situation that the friction force between the central axis of the screw rod 224 and the central axis of the second rotating shaft 222 is increased to further block the movement of the screw rod 224 due to the included angle formed between the central axis of the screw rod 224 and the central axis of the second rotating shaft 222 is avoided, and therefore the positioning rod 226 is arranged to ensure that the screw rod 224 can always keep moving stably in the radial direction.

In some embodiments, referring to fig. 2 and 10, the length of the screw 224 and the two positioning rods 226 is the same, and the length of the screw 224 and the two positioning rods 226 is greater than the length of the fixing part 221.

In this embodiment, the length of the lead screw 224 and the positioning rod 226 is greater than the length of the fixing portion 221, so that the laser head 210 has a larger stroke in the radial direction to adapt to more pipes with different pipe diameters, which is beneficial to improving the applicability of the pipe inner wall rust removal equipment.

In some embodiments, referring to fig. 4, 5, 6, 7 and 8, the laser head 210 includes a transmitting end 211 and a base 212, the transmitting end 211 being rotatably disposed on the base 212 such that the transmitting end 211 is rotatable about a third axis.

In this embodiment, the laser beam is emitted from the emitting end 211, and the laser beam is rotatably disposed on the base 212, so that a user can adjust the area of the laser beam sweeping the inner wall of the pipeline according to actual requirements.

It should be noted that the third axis refers to a rotation axis about which the emitting end 211 rotates on the base 212 relative to the base 212.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-mentioned preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be limited by the above-mentioned scope.

Claims (7)

1. The utility model provides a pipeline inner wall rust cleaning equipment for iron rust on clearance metal pipeline inner wall, its characterized in that includes:

the scroll compressor comprises a base (100), wherein a scroll threaded disc (110) capable of rotating around a first axis relative to the base (100) is arranged on the base (100), a plurality of clamping jaws (120) are connected to the scroll threaded disc (110) in a meshed mode, and the clamping jaws (120) can reciprocate along the radial direction of the scroll threaded disc (110) when the scroll threaded disc (110) rotates; one end, far away from the first axis, of the clamping jaw (120) is provided with a roller (130) which is attached to the inner wall of the pipeline and can roll along the axial direction of the inner wall of the pipeline;

the device comprises a base (100), a clamping jaw (120), a laser generator (200), a first shaft line and a second shaft line, wherein the laser generator (200) is rotatably arranged on the end face of one side, away from the clamping jaw (120), of the base (100) along the axial direction of the inner wall of the pipeline, and the laser generator (200) can rotate around the first shaft line; the laser generator (200) is used for generating laser emitted along the radial direction of the inner wall of the pipeline;

a first drive means mounted on said housing (100) for driving said scroll (110) in rotation about said first axis;

the second driving device is arranged on the base (100) and is used for driving the laser generator (200) to rotate around the first axis;

and the third driving device is arranged on the machine base (100) and is used for driving the roller (130) to rotate.

2. The rust removing apparatus for inner walls of pipes according to claim 1, wherein the first driving means comprises a driving motor (310) and a first rotating shaft (320), the driving motor (310) is connected with the first rotating shaft (320), and the first rotating shaft (320) is keyed with the scroll threaded disc (110); the drive motor (310) is directed toward the center of the scroll (110); be connected with mount (140) between driving motor (310) and frame (100) just mount (140) will driving motor (310) frame is kept away from frame (100) is close to the surface of driving motor (310).

3. The rust removing equipment for the inner wall of the pipeline according to claim 1, wherein the laser generator (200) comprises a telescopic device and a laser head (210), the telescopic device is connected with the laser head (210), and the telescopic device is rotatably arranged on the machine base (100) so that the telescopic device can rotate around the first axis; the telescopic device is used for driving the laser head (210) to reciprocate along the radial direction of the inner wall of the pipeline.

4. The apparatus for removing rust from an inner wall of a pipe as claimed in claim 3, wherein the telescopic means comprises:

the fixing part (221), the fixing part (221) is rotatably arranged on the base (100) so that the fixing part (221) can rotate around the first axis; a second rotating shaft (222) extending along the radial direction of the inner wall of the pipeline is arranged in the fixing part (221), and the second rotating shaft (222) can rotate around the second axis of the second rotating shaft relative to the fixing part (221); a threaded through hole (223) extending along the second axis is formed in the second rotating shaft (222);

the moving part comprises a screw rod (224) extending along the radial direction of the inner wall of the pipeline, and the screw rod (224) is inserted into the threaded through hole (223) and is in threaded connection with the threaded through hole (223); the laser head (210) is arranged at the end part of the screw rod (224);

and the fourth driving device is used for driving the second rotating shaft (222) to rotate around the second axis, so that the second rotating shaft (222) drives the screw rod (224) to reciprocate along the length direction of the second axis.

5. The rust removing apparatus for an inner wall of a pipe as claimed in claim 4, wherein the fixing portion (221) is further provided with two positioning through holes (225) extending in a radial direction of the inner wall of the pipe;

the moving part also comprises two positioning rods (226) extending along the radial direction of the inner wall of the pipeline, and both the two positioning rods (226) are connected with the laser head (210);

each positioning through hole (225) is correspondingly inserted with one positioning rod (226) so that the second rotating shaft (222) stably drives the screw rod (224) to reciprocate along the length direction of the second axis.

6. The rust removing apparatus for an inner wall of a pipe according to claim 5, wherein the lead screw (224) and the two positioning rods (226) have the same length, and the lead screw (224) and the two positioning rods (226) have a length greater than that of the fixing portion (221).

7. The rust removing apparatus for the inner wall of the pipeline according to claim 4, wherein the laser head (210) comprises an emitting end (211) and a base (212), and the emitting end (211) is rotatably arranged on the base (212) so that the emitting end (211) can rotate around a third axis.

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