CN111360671A

CN111360671A - Automatic rust removing device for inner wall of pipeline

Info

Publication number: CN111360671A
Application number: CN202010339624.1A
Authority: CN
Inventors: 徐淑晓; 许传阳; 高运禄; 刘兰双; 朱新芳
Original assignee: Haihui Group Co ltd
Current assignee: Haihui Group Co ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-07-03

Abstract

The invention discloses an automatic rust removing device for the inner wall of a pipeline, which comprises a central frame, wherein a walking supporting device is arranged on the central frame; a derusting base frame is rotatably arranged at one end of the central frame, and a derusting driving motor for driving the derusting base frame to rotate is arranged on the central frame; the rust removing device is characterized in that at least two rust removing supporting seats are circumferentially and uniformly distributed on the rust removing base frame, a rust removing brush which is spirally arranged is fixedly arranged on each rust removing supporting seat, and a rust removing supporting device is arranged between each rust removing supporting seat and the corresponding rust removing base frame. The derusting brush is arranged in a spiral shape, when the derusting driving motor drives the derusting brush, the derusting brush is subjected to the reaction force of the pipe wall, and component force along the axial direction of the inner wall of the pipeline is generated, and the component force can enable the derusting brush to form automatic traction walking. Therefore, the invention does not need to arrange a traction rope, and has high rust removal efficiency. The walking is not required to be additionally driven, the energy consumption is low, the traction is reliable, and the continuous work is favorably realized.

Description

Automatic rust removing device for inner wall of pipeline

Technical Field

The invention relates to the technical field of rust removing machinery, in particular to an automatic rust removing device for an inner wall of a pipeline.

Background

At present, the inner wall of a pipeline in the industry has rust removal modes such as manual rust removal, mechanical rust removal, sand blasting rust removal and the like, wherein in the mechanical rust removal, more and more manufacturers adopt rust removal vehicles capable of walking in the pipeline to complete the rust removal. The derusting vehicles are supported on the inner wall of the pipeline by using the travelling wheels, and then derusting is realized by driving derusting brushes which are uniformly distributed in the circumferential direction to rotate in the circumferential direction. The traction structure is roughly divided into two forms. In one form, a traction rope is arranged on a derusting vehicle, the derusting vehicle is initially arranged at one end of a pipeline, the traction rope extends out of the other end of the pipeline, and when derusting is carried out, the traction rope is pulled mechanically or manually to realize derusting traction. The other mode is that the rust removing vehicle is provided with a motor to drive the travelling wheels to travel. The first traction mode needs the insertion arrangement of the traction rope every time, so that a lot of working time is delayed, and the overall efficiency of rust removal is low. In the second traction mode, when the rusted part is polished, the rust removing brush and the rusted part have large friction resistance, so that the motor-driven travelling wheel needs to overcome large resistance to output power, the energy consumption is large, the power consumption of the self-powered power supply of the rust removing vehicle is high, and the rust removing endurance is poor; and if the contact force between the travelling wheels and the pipe wall is too small, the sliding phenomenon is easy to occur due to too large rust removal resistance, the rust removal cannot be normally pulled, the work is delayed, and the structural part is easy to damage.

Disclosure of Invention

The invention aims to solve the technical problem of providing an automatic rust removing device for the inner wall of the pipeline, which has high rust removing efficiency, lower energy consumption and reliable traction and is beneficial to realizing continuous work.

In order to solve the technical problems, the technical scheme of the invention is as follows: the automatic rust removing device for the inner wall of the pipeline comprises a central frame, wherein a walking supporting device is arranged on the central frame; a derusting base frame is rotatably arranged at one end of the central frame, and a derusting driving motor for driving the derusting base frame to rotate is arranged on the central frame; the rust removing device is characterized in that at least two rust removing supporting seats are circumferentially and uniformly distributed on the rust removing base frame, a rust removing brush which is spirally arranged is fixedly arranged on each rust removing supporting seat, and a rust removing supporting device is arranged between each rust removing supporting seat and the corresponding rust removing base frame.

As a preferred technical scheme, the rust removing support device comprises at least two rust removing connecting rods which are fixedly arranged on the rust removing base frame and correspond to the rust removing support seats one by one, a rust removing connecting sleeve is slidably arranged on the rust removing connecting rods, and an anti-rotating device is arranged between the rust removing connecting sleeve and the rust removing connecting rods; the rust removing support seat is fixedly connected to the rust removing connecting sleeve through a rust removing support rod, and a rust removing compression degree adjusting device is arranged between the rust removing connecting sleeve and the rust removing connecting rod.

As an optimized technical scheme, the anti-rotation device comprises a connecting sleeve sliding part arranged on the derusting connecting rod, the cross section of the connecting sleeve sliding part is in a polygonal arrangement, and an inner hole of the derusting connecting sleeve is in a polygonal arrangement corresponding to the connecting sleeve sliding part.

According to the technical scheme, the derusting compression degree adjusting device comprises a compression degree adjusting thread which is arranged on the derusting connecting rod and is positioned on one side, away from the derusting supporting seat, of the connecting sleeve sliding portion, a compression degree adjusting nut is installed on the compression degree adjusting thread, and a compression force application spring which is positioned between the compression degree adjusting nut and the derusting connecting sleeve is sleeved on the derusting connecting rod.

As an optimized technical scheme, one side, close to the derusting supporting seat, of the connecting sleeve sliding portion on the derusting connecting rod is provided with connecting sleeve anti-falling threads, connecting sleeve anti-falling nuts are installed on the connecting sleeve anti-falling threads, and the derusting connecting rod is sleeved with an anti-falling force application spring located between the connecting sleeve anti-falling nuts and the derusting connecting sleeve.

As a preferred technical scheme, the walking support device comprises at least three walking support frames which are uniformly distributed on the central frame in the circumferential direction, each walking support frame comprises two walking support rods which are hinged to the central frame and arranged in the front and at the back, the walking support rods are arranged in an inclined manner towards the same direction, and a walking support wheel is mounted at the free end of each walking support rod; the synchronous support connecting rod is hinged between the two walking support rods, the synchronous support connecting rod, the two walking support rods and the central frame form a parallelogram mechanism, and a support force application spring is arranged on the parallelogram mechanism.

As a preferred technical scheme, the free end of the derusting brush is gradually close to the inner wall of the pipeline along the direction from the rotating front end to the rotating rear end.

As a preferred technical scheme, the center frame comprises a cylinder body, end covers are fixedly arranged at two ends of the cylinder body, and the rust removal base frame is rotatably arranged on one of the end covers.

As a preferred technical scheme, a power supply is arranged on the center frame, and the derusting driving motor is electrically connected with the power supply; the power supply comprises a nickel-cadmium battery.

As an optimal technical scheme, a derusting controller is installed on the center frame, an outlet pipe inductor is installed on the center frame or the walking support device, the outlet pipe inductor is in signal connection with the derusting controller, and an output end of the derusting controller is in signal connection with the derusting driving motor.

By adopting the technical scheme, the automatic rust removing device for the inner wall of the pipeline comprises a center frame, wherein a walking support device is arranged on the center frame; a derusting base frame is rotatably arranged at one end of the central frame, and a derusting driving motor for driving the derusting base frame to rotate is arranged on the central frame; the rust removing device is characterized in that at least two rust removing supporting seats are circumferentially and uniformly distributed on the rust removing base frame, a rust removing brush which is spirally arranged is fixedly arranged on each rust removing supporting seat, and a rust removing supporting device is arranged between each rust removing supporting seat and the corresponding rust removing base frame. The derusting brush is arranged in a spiral shape, when the derusting driving motor drives the derusting brush, the derusting brush is subjected to the reaction force of the pipe wall, and component force along the axial direction of the inner wall of the pipeline is generated, and the component force can enable the derusting brush to form automatic traction walking. Therefore, the invention does not need to arrange a traction rope, and has high rust removal efficiency. And because the traction power comes from the reaction force of the pipe wall, compared with the prior art, the traction power converts a part of friction loss into traction kinetic energy, does not need to apply additional drive to walking, has low energy consumption and reliable traction, and is beneficial to realizing continuous work.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic view of the A-direction structure of FIG. 1;

fig. 3 is a schematic view of the structure of fig. 1 in the direction B.

In the figure: 1-a centre frame; 11-a barrel body; 12-an end cap; 2-a walking support device; 21-a walking support frame; 22-walking support rods; 23-a walking support wheel; 24-a synchronous support link; 25-supporting the force application spring; 3-derusting the bed frame; 31-derusting a driving motor; 32-a power supply source; 4-derusting the supporting seat; 41-a derusting brush; 5-derusting the supporting device; 51-a derusting connecting rod; 52-connecting sleeve sliding part; 53-tightness adjusting nuts; 54-pressing the forcing spring; 55-connecting sleeve anti-drop nut; 56-anti-drop force application spring; 57-derusting connecting sleeves; 58-derusting support rod; 6-pipeline.

Detailed Description

The invention is further illustrated below with reference to the figures and examples. In the following detailed description, exemplary embodiments of the invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in fig. 1, 2 and 3, the automatic rust removing device for the inner wall of the pipeline comprises a center frame 1, wherein a walking support device 2 is arranged on the center frame 1. The center frame 1 is a carrier with a structure for removing rust and the like, and the walking support device 2 can support the center frame 1 in a pipeline 6.

This embodiment the walking strutting arrangement 2 includes that at least three is in the walking support frame 21 that circumference equipartition set up on the centre frame 1, this embodiment the walking support frame 21 indicates to be three. Each walking support frame 21 comprises two walking support rods 22 which are hinged to the central frame 1 and arranged in the front-back direction, the walking support rods 22 are arranged in an inclined mode towards the same direction, and a walking support wheel 23 is mounted at the free end of each walking support rod 22. A synchronous supporting connecting rod 24 is hinged between the two walking supporting rods 22, the synchronous supporting connecting rod 24, the two walking supporting rods 22 and the central frame 1 form a parallelogram mechanism, and a supporting force application spring 25 is arranged on the parallelogram mechanism.

The support application springs 25 apply to the traveling support wheels 23 a spring force inclined to the vertical, which may press the traveling support wheels 23 against the inner wall of the pipe 6, while the traveling support wheels 23 of the three sets of the traveling support frames 21 may form a six-point support, and the steady 1 may be supported in the pipe 6. In addition, because the walking supporting wheels 23 do not roll along the circumferential direction of the inner wall of the pipeline 6, the friction force formed by the supporting and pressing force of the walking supporting wheels can ensure that the center frame 1 is not easy to rotate along the circumferential direction of the inner wall of the pipeline 6, and the stability of the center frame 1 is ensured. The support force application spring 25 elastically deforms, so that the parallelogram mechanism can adapt to different pipe diameters to change, and the rust removal work can be performed on the pipelines 6 with multiple pipe diameters in the embodiment.

The two ends of the supporting and forcing spring 25 are close to two opposite corner hinge points of the parallelogram mechanism, so that better forcing can be realized, which is common knowledge and is not described in detail herein. In the embodiment shown in fig. 1, two ends of the supporting and forcing spring 25 are respectively connected to the two walking support rods 22, but may also be connected between the walking support rod 22 on the left side in fig. 1 and the synchronous support link 24, or between the center frame 1 and the walking support rod 22 on the right side in fig. 1, or between the center frame 1 and the synchronous support link 24, etc.

In the embodiment, the free end of the walking support rod 22 is symmetrically provided with two walking support wheels 23, so that the embodiment can be in twelve point contacts with the inner wall of the pipeline 6. The twelve-point contact not only enables the supporting function to be better, but also enables the function of preventing the center frame 1 from following along the circumferential direction of the inner wall of the pipeline 6 to be more obvious, and the stability of the center frame 1 is higher.

One end of the center frame 1 is rotatably provided with a derusting base frame 3, and the center frame 1 is provided with a derusting driving motor 31 for driving the derusting base frame 3 to rotate. In this embodiment, the rust removing base frame 3 is provided with a rotating shaft, the rotating shaft is mounted at the end of the center frame 1 through a bearing, and then the power end of the rust removing driving motor 31 is in power connection with the rotating shaft.

The center frame 1 of the present embodiment includes a cylinder 11, and the cylinder 11 has a central symmetrical structure, so that the overall center of gravity of the present embodiment is conveniently maintained near the center of the pipeline 6. End covers 12 are fixedly arranged at two ends of the cylinder body 11, and the end covers 12 can be fixed at two ports of the cylinder body 11 through bolts; the rust removing base frame 3 is rotatably installed on one of the end covers 12, preferably, a rotating shaft of the rust removing base frame 3 is coaxially arranged with the cylinder 11, and a power end of the rust removing driving motor 31 is directly connected with the rotating shaft of the rust removing base frame 3. In the embodiment, the center frame 1 forms a hollow cylindrical structure, and the rust removal driving motor 31 is installed in the center frame 1, so that rust dust pollution can be effectively avoided. Of course, when the four walking support frames 21 are circumferentially and uniformly distributed, the center frame 1 may also be designed to be a hollow rectangular structure.

In this embodiment, a power supply 32 is installed on the center frame 1, and the rust removal driving motor 31 is electrically connected with the power supply 32; preferably, the power supply 32 is also located within the steady 1. The power supply 32 comprises a nickel-cadmium battery, and the nickel-cadmium battery has the advantages of quick charging, large discharging current and the like, can shorten the charging time, is convenient to realize continuous rust removal work, is beneficial to improving the integral efficiency of rust removal, can provide larger acceleration when being started for rust removal, and is beneficial to quick starting of the rust removal work. Power supply 32 accessible charging wire arranges the socket in one of them end cover 12 department to carry out the shutoff through the shutoff lid to the socket, when charging, with the shutoff lid pull down charge can, this embodiment power supply 32 etc. also can avoid rust dust pollution like this. The charging structure of the power supply 32 is a common technique of the conventional rechargeable battery, and is not described herein again.

The rust removing base frame 3 is provided with at least two rust removing supporting seats 4 which are uniformly distributed in the circumferential direction, and the rust removing supporting seats 4 are indicated to be three in the embodiment. The rust removing support seat 4 is fixedly provided with a rust removing brush 41 which is spirally arranged, and a rust removing support device 5 is arranged between the rust removing support seat 4 and the rust removing base frame 3. After the rust removal is started, the inner wall of the pipeline 6 generates a reaction force to the rust removing brush 41 while the rust removing brush 41 is pressed against the inner wall of the pipeline 6 and is subjected to friction rust removal, the reaction force is generally called resistance, and because the rust removing brush 41 is arranged in a spiral shape in the embodiment, the reaction force applied to the rust removing brush 41 can be divided into a component force along the axial direction of the pipeline 6 and a component force parallel to the spiral shape, and the component force along the axial direction of the pipeline 6 can form the traction power in the embodiment. Through the change of simple structure like this, compare the condition that prior art frictional resistance mainly changes into internal energy, this embodiment can be with some energy conversion of reaction force traction kinetic energy, and energy utilization improves, need not extra traction drive, and the energy consumption reduces. And because the reaction force always has component force along the axial direction of the pipeline 6 in the process of rust removal, the walking supporting wheel 23 only rotates in a driven manner, so that the traction of the embodiment is more reliable, and the work of rust removal can be smoothly finished.

The free end of the rust removing brush 41 described in this embodiment is disposed gradually closer to the inner wall of the duct 6 in the direction from the front end to the rear end of the rotation. Therefore, the rust removing brush 41 is loose in front and tight in back after being pressed against the inner wall of the pipeline 6, when rust removing is carried out, for rust removing at the same position, the loose front end of the rust removing brush 41 firstly passes through the position, then the tight rear end with larger pressing force finally passes through the position, and the rust removing brush 41 can realize strength progressive rust removing at the position, so that the rust removing effect can be improved, certain friction resistance can be reduced, the power output of the rust removing driving motor 31 is reduced, and the energy consumption is reduced.

In order to enable the embodiment to remove rust on the inner walls of pipelines 6 with different pipe diameters, the rust removing supporting device 5 is also adaptively arranged. In this embodiment, the rust removing supporting device 5 includes at least two rust removing connecting rods 51 fixedly disposed on the rust removing base frame 3 and corresponding to the rust removing supporting seats 4 one by one, and the number of the rust removing supporting seats 4 is three in this embodiment, so the number of the rust removing connecting rods 51 is also three. A derusting connecting sleeve 57 is slidably mounted on the derusting connecting rod 51, and an anti-rotating device is arranged between the derusting connecting sleeve 57 and the derusting connecting rod 51. The rust removing connecting sleeve 57 is fixedly connected with the rust removing supporting seat 4 through a rust removing supporting rod 58, and a rust removing compression degree adjusting device is arranged between the rust removing connecting sleeve 57 and the rust removing connecting rod 51. In the embodiment, the rust removing connecting sleeve 57 is installed in a sliding manner, and the rust removing brush 41 can be removed under a proper pressing force through the rust removing compression degree adjusting device, so that the abrasion of the rust removing brush 41 can be reduced while the rust removing effect is ensured.

Wherein the rotation preventing means is an intermediate connecting structure for ensuring the stability of the rust removing brush 41. In this embodiment, the anti-rotation device includes that the setting is in the last adapter sleeve sliding part 52 of rust cleaning connecting rod 51, the cross-section of adapter sleeve sliding part 52 is the polygon setting, the hole of rust cleaning adapter sleeve 57 be with the polygon setting that adapter sleeve sliding part 52 corresponds. The derusting connecting sleeve 57 is prevented from rotating by the limitation of the polygon to the circumferential movement, and the derusting brush 41 can not rotate around the derusting connecting rod 51, so that the stable derusting operation and the stable traction conversion can be ensured. Of course, the anti-rotation device of the present embodiment can also be implemented by using a key, an axial pin, or other structures.

The derusting degree-of-compaction adjusting device comprises a derusting connecting rod 51, a derusting degree adjusting screw thread, a derusting degree adjusting nut 53 and a compression force application spring 54, wherein the derusting degree adjusting screw thread is arranged on the derusting connecting rod 51 and is located at a position where the connecting sleeve sliding part 52 is far away from one side of the derusting supporting seat 4, and the derusting connecting rod 51 is sleeved with the compression force application spring 54 located between the derusting degree adjusting nut 53 and the derusting connecting sleeve 57. The force of pressing the rust removing brush 41 against the inner wall of the pipeline 6 in this embodiment is mainly derived from the spring force of the pressing and applying spring 54, and after the rust removing brush 41 is pressed against the inner wall of the pipeline 6, the compression amount of the pressing and applying spring 54 can be adjusted by adjusting the pressing and applying spring 54 to different positions, and the force of pressing the rust removing brush 41 against the inner wall of the pipeline 6 can be adjusted accordingly.

In addition, this embodiment lie in on the rust removal connecting rod 51 the adapter sleeve sliding part 52 is close to one side of rust removal supporting seat 4 is equipped with adapter sleeve anticreep screw thread, install adapter sleeve anticreep nut 55 on the adapter sleeve anticreep screw thread, the cover is equipped with and is located on the rust removal connecting rod 51 adapter sleeve anticreep nut 55 with anticreep application of force spring 56 between the rust removal adapter sleeve 57. The connecting sleeve anti-dropping nut 55 is connected with the derusting connecting sleeve 57 through the anti-dropping force application spring 56, so that the anti-dropping limit of the connecting sleeve anti-dropping nut 55 can be transmitted to the derusting connecting sleeve 57 at any time.

In this embodiment, a rust removal controller is installed on the center frame 1, an outlet pipe sensor is installed on the center frame 1 or the walking support device 2, the outlet pipe sensor is in signal connection with the rust removal controller, and an output end of the rust removal controller is in signal connection with the rust removal driving motor 31. The pipe outlet sensor senses the pipe outlet of the embodiment to judge that the rust removal work of the inner wall of the pipeline 6 is finished, and the rust removal driving motor 31 is controlled to stop so as to stop rust removal and traction. The exit tube sensor may use a proximity sensor disposed on the center frame 1 to sense whether the exit tube is present or not, or a proximity sensor disposed at a free end of the walking support rod 22 in the walking support device 2 to sense whether the exit tube is present or not.

In use, the parallelogram mechanism is manually operated, so that all the walking support wheels 23 can enter the pipeline 6, and the central frame 1 can enter the pipeline 6. When the parallelogram mechanism is released, the support force application spring 25 can enable the walking support wheel 23 to be freely pressed against the inner wall of the pipeline 6 to form a support. Then, the compression degree adjusting nut 53 is adjusted to reduce the spring force of the compression force application spring 54, so that the derusting brush 41 can enter the pipeline 6, then the compression degree adjusting nut 53 is adjusted reversely, so that the derusting brush 41 is pressed against the inner wall of the pipeline 6, and finally the compression force application spring 54 is compressed for a certain length and provides a proper pressing acting force for the derusting brush 41. The rust removal driving motor 31 is started, the rust removal brush 41 starts to rotate along the circumferential direction of the pipeline 6, rust removal work starts, the reaction force borne by the rust removal brush 41 drives the whole body of the embodiment to move forward, the walking supporting wheel 23 only rotates in a driven mode, resistance is small, and the rust removal work of the inner wall of the pipeline 6 can be smoothly completed by the embodiment. When the walking supporting wheel 23 goes out of the pipeline 6, the pipe outlet sensor is triggered, the derusting driving motor 31 stops, and derusting and traction are finished simultaneously. In the process of taking out the pipe 6 and putting the pipe 6 into another pipe 6, the power supply 32 can be charged at the same time, so that when the rust removal of the next pipe 6 is started, the electric quantity of the power supply 32 can be recovered to a certain degree, the rust removal operation can be carried out immediately, and the continuous rust removal work of the pipe 6 is realized. Based on the above using method, the inclination direction of the walking support rod 22 in this embodiment is inclined towards the front of the traveling direction of this embodiment, and the rust removing base frame 3 is installed at the rear end of the center frame 1, so that rust dust generated by rust removal by the rust removing brush 41 during rust removing operation is not easy to pollute the structure of the walking support frame 21 at the front end, and the cleaning and maintenance strength of this embodiment can be reduced.

The embodiment does not need to arrange a traction rope, and the traction power comes from the reaction force of the pipe wall, so that compared with the prior art, a part of friction loss is converted into traction kinetic energy, extra driving is not required to be applied to walking, the energy consumption is low, the traction is reliable, and the continuous work is favorably realized.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Automatic rust cleaning device of pipeline inner wall, including the centre frame, its characterized in that: the central frame is provided with a walking support device; a derusting base frame is rotatably arranged at one end of the central frame, and a derusting driving motor for driving the derusting base frame to rotate is arranged on the central frame; the rust removing device is characterized in that at least two rust removing supporting seats are circumferentially and uniformly distributed on the rust removing base frame, a rust removing brush which is spirally arranged is fixedly arranged on each rust removing supporting seat, and a rust removing supporting device is arranged between each rust removing supporting seat and the corresponding rust removing base frame.

2. The automatic rust removing device for the inner wall of the pipeline as claimed in claim 1, wherein: the rust removal supporting device comprises at least two rust removal connecting rods which are fixedly arranged on the rust removal base frame and correspond to the rust removal supporting seats one by one, a rust removal connecting sleeve is slidably arranged on the rust removal connecting rods, and an anti-rotating device is arranged between the rust removal connecting sleeve and the rust removal connecting rods; the rust removing support seat is fixedly connected to the rust removing connecting sleeve through a rust removing support rod, and a rust removing compression degree adjusting device is arranged between the rust removing connecting sleeve and the rust removing connecting rod.

3. The automatic rust removing device for the inner wall of the pipeline as claimed in claim 2, wherein: the anti-rotation device comprises a connecting sleeve sliding part arranged on the derusting connecting rod, the cross section of the connecting sleeve sliding part is polygonal, and an inner hole of the derusting connecting sleeve is polygonal and corresponds to the connecting sleeve sliding part.

4. An automatic rust removing device for the inner wall of a pipeline as claimed in claim 3, characterized in that: the derusting compression degree adjusting device comprises a compression degree adjusting thread which is arranged on the derusting connecting rod and is positioned on one side, far away from the derusting supporting seat, of the connecting sleeve sliding part, a compression degree adjusting nut is installed on the compression degree adjusting thread, and a compression force application spring which is positioned between the compression degree adjusting nut and the derusting connecting sleeve is sleeved on the derusting connecting rod.

5. The automatic rust removing device for the inner wall of the pipeline as claimed in claim 4, wherein: the rust removing device is characterized in that the rust removing connecting rod is located on one side, close to the rust removing supporting seat, of the connecting sleeve sliding portion, a connecting sleeve anti-falling thread is arranged on the connecting sleeve anti-falling thread, a connecting sleeve anti-falling nut is installed on the connecting sleeve anti-falling thread, and the rust removing connecting rod is sleeved with an anti-falling force application spring located between the connecting sleeve anti-falling nut and the rust removing connecting sleeve.

6. The automatic rust removing device for the inner wall of the pipeline as claimed in claim 1, wherein: the walking support device comprises at least three walking support frames which are uniformly distributed on the central frame in the circumferential direction, each walking support frame comprises two walking support rods which are hinged to the central frame and arranged in the front-back direction, the walking support rods are arranged in an inclined mode towards the same direction, and a walking support wheel is mounted at the free end of each walking support rod; the synchronous support connecting rod is hinged between the two walking support rods, the synchronous support connecting rod, the two walking support rods and the central frame form a parallelogram mechanism, and a support force application spring is arranged on the parallelogram mechanism.

7. The automatic rust removing device for the inner wall of the pipeline as claimed in claim 1, wherein: the free end of the derusting brush is gradually close to the inner wall of the pipeline along the direction from the rotating front end to the rotating rear end.

8. The automatic rust removing device for the inner wall of the pipeline as claimed in claim 1, wherein: the center frame comprises a barrel, end covers are fixedly arranged at two ends of the barrel, and the derusting base frame is rotatably arranged on one of the end covers.

9. The automatic rust removing device for the inner wall of the pipeline as claimed in claim 1, wherein: a power supply is arranged on the center frame, and the derusting driving motor is electrically connected with the power supply; the power supply comprises a nickel-cadmium battery.

10. An automatic rust removing device for inner walls of pipes as claimed in any one of claims 1 to 9, characterized in that: the central frame is provided with a derusting controller, the central frame or the walking support device is provided with an outlet pipe sensor, the outlet pipe sensor is in signal connection with the derusting controller, and the output end of the derusting controller is in signal connection with the derusting driving motor.