CN111761430A

CN111761430A - Polishing device suitable for inner walls of pipelines with different calibers

Info

Publication number: CN111761430A
Application number: CN202010675360.7A
Authority: CN
Inventors: 李辉虎
Original assignee: Fuzhou Changle District Siat Technology Co ltd
Current assignee: Fuzhou Changle District Siat Technology Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2020-10-13

Abstract

The invention discloses a polishing device suitable for inner walls of pipelines with different calibers, which comprises a machine body, wherein a transmission cavity is arranged in the machine body, a lifting groove is arranged above the transmission cavity, a transition cavity is arranged on the right side of the lifting groove, a connection cavity is arranged on the right side of the transition cavity, a working cavity is arranged above the lifting groove, a dust suction cavity is arranged on the left side of the lifting groove, and a spline shaft extending up and down is rotatably connected to the inner wall of the bottom side of the transmission cavity.

Description

Polishing device suitable for inner walls of pipelines with different calibers

Technical Field

The invention relates to the technical field related to machine polishing devices, in particular to a polishing device suitable for inner walls of pipelines with different calibers.

Background

Many parts or work pieces have certain requirement to the frictional degree on surface in process of production, and current pipeline inner wall grinding device generally can only polish same big or small pipeline to need the manual work to carry out fixed mounting, need polish along the polishing of the inner wall round of pipeline when polishing pipeline inner wall in addition, the effect of polishing is relatively poor and work efficiency is lower.

Disclosure of Invention

Aiming at the technical defects, the invention provides a polishing device suitable for inner walls of pipelines with different calibers, which can overcome the defects.

The invention relates to a polishing device for inner walls of pipelines adapting to different calibers, which comprises a machine body, wherein a transmission cavity is arranged in the machine body, a lifting groove is arranged above the transmission cavity, a transition cavity is arranged at the right side of the lifting groove, a linking cavity is arranged at the right side of the transition cavity, a working cavity is arranged above the lifting groove, a dust suction cavity is arranged at the left side of the lifting groove, the inner wall at the bottom side of the transmission cavity is rotatably connected with a spline shaft extending up and down, a spline sleeve is matched on the spline shaft in a spline way, a lifting block is matched on the inner wall at the left side of the lifting groove in a vertical sliding way, an inlet through a pipeline is arranged above the working cavity and outside, the lifting block is rotatably connected with the spline sleeve, a through hole is arranged between the dust suction cavity and the working cavity, the upper end of the spline sleeve is fixedly connected with a, fixedly connected with is located on the jointing axle the rotor plate of transition intracavity, transition chamber right side inner wall rotates and is connected with the input shaft that extends about, it is connected with the jointing board to rotate on the input shaft, fixedly connected with is located on the input shaft the rotor wheel on jointing board right side, the jointing board right-hand member articulates there is the drive the pawl board of rotor wheel intermittent type pivoted, the jointing board right-hand member articulate have with rotor plate articulated connecting rod, transmission chamber bottom side inner wall rotates and is connected with the transmission shaft that extends from top to bottom, be provided with in the working chamber and be used for right the pipeline presss from both sides tight fixed subassembly of clamp, the working chamber with it is used for installing the head of polishing in order to adapt to the head of polishing installation subassembly of different internal diameter pipelines to link up the intracavity.

Preferably, the inner wall polishing assembly further comprises a driving motor fixedly mounted on the inner wall of the bottom side of the transmission cavity, the end of the driving motor is provided with a driving shaft extending up and down, the spline shaft is fixedly connected with a main gear, the driving motor is rotatably connected with a main gear which is provided with a cavity and is meshed with the main gear, the driving shaft is fixedly connected with a main ratchet wheel which can be rotatably connected with the main gear, the driving shaft is in transmission connection with the linking shaft through a bevel gear, the input shaft is fixedly connected with an input wheel positioned in the lifting groove, the inner wall of the right side of the transition cavity is rotatably connected with an output shaft extending left and right, the end of the output shaft is fixedly connected with an output wheel positioned in the lifting groove, the input wheel is rotatably connected with the output wheel through a transmission chain, and the left end of the transmission chain, the utility model discloses a dust collection device, including dust collection chamber, slider, lifter, dust collection chamber, connecting axle, transmission shaft, integral key shaft, connecting axle right-hand member fixedly connected with slider sliding fit's rectangle frame, dust collection chamber left side inner wall rotates and is connected with the connecting axle that extends about being connected with, the connecting axle pass through bevel gear with the transmission shaft transmission is connected, the integral key shaft pass through the band pulley with the transmission shaft transmission is connected, connecting axle right-hand member fixedly connected with flabellum.

Preferably, the clamping and fixing component comprises a left sliding plate connected with the inner wall of the rear side of the working cavity in a left-right sliding manner, the left end of the left sliding plate is provided with a top pressure spring fixedly mounted with the inner wall of the left side of the working cavity, the right end of the left sliding plate is provided with a left supporting block for adjusting the position of the pipeline, the inner wall of the top side of the working cavity is fixedly mounted with a control motor, the tail end of the control motor is provided with a control shaft extending up and down, the control shaft is in spline fit with a control sleeve, the control sleeve is rotatably connected with a control block with the right end connected with the inner wall of the right side of the working cavity in a vertical sliding manner, the control shaft is fixedly connected with an eccentric wheel, the inner wall of the rear side of the working cavity is connected with a moving frame matched with the eccentric wheel in a left-right sliding manner, the left end of the moving frame is fixedly connected, the inner wall of the left side of the working cavity is connected with a wedge block which can be driven by the pipeline to move backwards in a front-back sliding mode, the rear end of the wedge block is provided with a control spring fixedly installed on the inner wall of the rear side of the working cavity, and the right end of the wedge block is fixedly connected with a connecting plate which is abutted to the control block.

Preferably, the polishing head mounting assembly comprises a turntable fixedly connected with the lower end of the control sleeve, the lower end of the turntable is fixedly connected with a plurality of suckers, the inner wall of the right bottom side of the working chamber is fixedly provided with a mounting plate, the upper end of the mounting plate is rotatably provided with a plurality of slave friction blocks in friction fit with the master friction blocks, the upper ends of the slave friction blocks are fixedly provided with polishing discs with different sizes, the polishing discs can be adsorbed by the suckers, the inner walls of the left side and the right side of the linking chamber are rotatably connected with worm shafts, the inner walls of the front side and the rear side of the linking chamber are rotatably connected with fixed shafts, the fixed shafts are fixedly connected with fixed gears in threaded fit with the worm shafts, the inner wall of the front side of the working chamber is slidably connected with a movable plate for pushing the polishing discs left and right, and, the fixed shaft is fixedly connected with a cam which can be matched with the moving plate.

Preferably, the polishing head mounting assembly further comprises a connecting gear which is rotatably connected with the connecting shaft and is provided with a cavity, the connecting shaft is fixedly connected with a driven ratchet wheel which can drive the connecting gear to rotate, the inner walls of the left side and the right side of the connecting cavity are rotatably connected with a transition shaft, the transition shaft is fixedly connected with a transition gear which is in meshed connection with the connecting gear, the transition shaft is in transmission connection with the worm shaft through a belt wheel, the control motor is started according to the size of the inner wall of the pipeline, and therefore the sucker is driven to rotate through the rotation of the rotary disc, and the appropriate polishing disc is driven to rotate to the left portion of the mounting plate.

The beneficial effects are that: the device during operation can be fixed the pipeline through pressing from both sides tight fixed subassembly, can evenly polish and make the piece get into the suction chamber through inner wall grinding component to the pipeline inner wall according to the big or small installation grinding head of pipeline internal diameter through grinding head mounting assembly, has improved work efficiency.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a polishing device for inner walls of pipelines with different calibers, according to the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1 according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1 according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the structure C-C in FIG. 1 according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the D-D structure shown in FIG. 3 according to an embodiment of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations and/or steps that are mutually exclusive.

The invention will now be described in detail with reference to fig. 1-5, for convenience of description, the following orientations will now be defined: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a polishing device suitable for inner walls of pipelines with different calibers, which comprises a machine body 11, wherein a transmission cavity 12 is arranged in the machine body 11, a lifting groove 73 is arranged above the transmission cavity 12, a transition cavity 14 is arranged at the right side of the lifting groove 73, a connecting cavity 13 is arranged at the right side of the transition cavity 14, a working cavity 15 is arranged above the lifting groove 73, a dust suction cavity 16 is arranged at the left side of the lifting groove 73, a spline shaft 20 extending up and down is rotatably connected with the inner wall at the bottom side of the transmission cavity 12, a spline sleeve 27 is matched on the spline shaft 20, a lifting block 28 is in up and down sliding fit with the inner wall at the left side of the lifting groove 73, an inlet through a pipeline 32 is arranged above the working cavity 15, the lifting block 28 is rotatably connected with the spline sleeve 27, a through hole 26 is arranged between the dust suction cavity 16 and the working cavity 15, the upper end of the spline sleeve 27 is fixedly connected with, the inner wall of the right side of the connecting cavity 13 is rotatably connected with a connecting shaft 53 extending left and right, the connecting shaft 53 is fixedly connected with a rotating plate 70 positioned in the transition cavity 14, an input shaft 62 extending left and right is rotatably connected to the right inner wall of the transition chamber 14, an engaging plate 67 is rotatably connected to the input shaft 62, a turning wheel 66 is fixedly connected to the input shaft 62 at the right side of the joint plate 67, a pawl plate 68 which can drive the rotating wheel 66 to rotate intermittently is hinged at the right end of the connecting plate 67, the right end of the connecting plate 67 is hinged with a connecting rod 69 hinged with the rotating plate 70, the inner wall of the bottom side of the transmission cavity 12 is rotatably connected with a transmission shaft 22 extending up and down, a clamping and fixing assembly for clamping and fixing the pipeline 32 is arranged in the working cavity 15, and a grinding head mounting assembly used for mounting a grinding head to adapt to pipelines with different inner diameters is arranged in the working cavity 15 and the connecting cavity 13.

Advantageously, the inner wall grinding assembly further comprises a driving motor 17 fixedly mounted on the inner wall of the bottom side of the transmission cavity 12, the end of the driving motor 17 is provided with a driving shaft 18 extending up and down, a main gear 21 is fixedly connected to the spline shaft 20, a main gear 19 having a cavity and engaged with the main gear 21 is rotatably connected to the driving motor 17, a main ratchet 71 rotatably connected to the main gear 19 is fixedly connected to the driving shaft 18, the driving shaft 18 is in transmission connection with the engaging shaft 53 through a bevel gear, an input wheel 63 located in the lifting groove 73 is fixedly connected to the input shaft 62, an output shaft 51 extending left and right is rotatably connected to the inner wall of the right side of the transition cavity 14, an output wheel 49 located in the lifting groove 73 is fixedly connected to the end of the output shaft 51, and the input wheel 63 is rotatably connected to the output wheel 49 through a transmission chain 50, a slider 64 is fixedly connected to the left end of the transmission chain 50, a rectangular frame 65 which is in sliding fit with the slider 64 is fixedly connected to the right end of the lifting block 28, a connecting shaft 23 which extends left and right is rotatably connected to the inner wall of the left side of the dust suction cavity 16, the connecting shaft 23 is in transmission connection with the transmission shaft 22 through a bevel gear, the spline shaft 20 is in transmission connection with the transmission shaft 22 through a belt pulley, fan blades 24 are fixedly connected to the right end of the connecting shaft 23, filter plates 25 are fixedly mounted on the inner walls of the upper and lower sides of the dust suction cavity 16, the driving motor 17 is started to rotate in the forward direction, so that the main gear 19 is driven to rotate through the main ratchet wheel 71, the main friction block 44 is driven to rotate through the main gear 21, the connecting shaft 53 is driven to rotate through the bevel gear, and the rotating wheel 66 is driven to rotate intermittently under the action of the, the lifting block 28 is driven by the input wheel 63, the output wheel 49 and the transmission chain 50 to move upwards or downwards intermittently, so that the main friction block 44 drives the polishing head to polish the inner wall of the pipeline, meanwhile, the transmission shaft 22 is driven to rotate by belt wheel transmission, the connecting shaft 23 is driven to rotate by bevel gear transmission, and residues generated by polishing enter the dust suction cavity 16 through the through hole 26 by the rotation of the fan blades 24.

Advantageously, the clamping and fixing assembly comprises a left sliding plate 30 connected with the rear inner wall of the working chamber 15 in a left-right sliding manner, the left end of the left sliding plate 30 is provided with a top pressure spring 29 fixedly mounted with the left inner wall of the working chamber 15, the right end of the left sliding plate 30 is provided with a left supporting block 31 for adjusting the position of the pipeline 32, the top inner wall of the working chamber 15 is fixedly mounted with a control motor 35, the tail end of the control motor 35 is provided with a control shaft 36 extending up and down, the control shaft 36 is in spline fit with a control sleeve 40, the control sleeve 40 is rotatably connected with a control block 39 with the right end connected with the right inner wall of the working chamber 15 in a up-down sliding manner, the control shaft 36 is fixedly connected with an eccentric wheel 37, the rear inner wall of the working chamber 15 is connected with a moving frame 38 mutually matched with the eccentric wheel 37 in a left-right sliding manner, the left end of the right sliding plate 34 is provided with a right supporting block 33 which is matched with the left supporting block 31 to adjust the position of the pipeline 32 and is fixedly clamped, a wedge block 41 which can be driven by the pipeline 32 to move backwards is connected with the inner wall of the left side of the working cavity 15 in a front-back sliding way, the rear end of the wedge block 41 is provided with a control spring 43 fixedly arranged with the inner wall of the rear side of the working cavity 15, the right end of the wedge block 41 is fixedly connected with a connecting plate 42 which is mutually abutted with the control block 39, the pipeline 32 is sent between the left supporting block 31 and the pipeline 32, the control motor 35 is started, so that the moving frame 38 is driven to move rightwards by the rotation of the eccentric wheel 37, and is matched with the left supporting block 31 under the action of the top pressure spring 29, so that the right supporting block 33 and the left supporting block 31 clamp and fix the pipe 32.

Advantageously, the polishing head mounting assembly comprises a rotating disc 45 fixedly connected with the lower end of the control sleeve 40, a plurality of suckers 46 are fixedly connected with the lower end of the rotating disc 45, a mounting plate 74 is fixedly mounted on the inner wall of the bottom right side of the working chamber 15, a plurality of slave friction blocks 48 in friction fit with the master friction block 44 are rotatable on the upper end of the mounting plate 74, polishing discs 47 with different sizes are fixedly mounted on the upper ends of the slave friction blocks 48, the polishing discs 47 can be adsorbed by the suckers 46, worm shafts 56 are rotatably connected with the inner walls on the left and right sides of the linking chamber 13, fixed shafts 57 are rotatably connected with the inner walls on the front and back sides of the linking chamber 13, fixed gears 58 in threaded fit with the worm shafts 56 are fixedly connected on the fixed shafts 57, a moving plate 60 for pushing the polishing disc 47 is slidably connected on the inner wall on the front side of the working chamber 15 on the left and right sides, a return spring 61, a cam 59 capable of cooperating with the moving plate 60 is fixedly connected to the fixed shaft 57.

Advantageously, the sanding head mounting assembly further comprises an engaging gear 55 rotatably connected to the engaging shaft 53 and having a hollow cavity, a driven ratchet wheel 72 is fixedly connected to the engaging shaft 53 for rotating the engaging gear 55, a transition shaft 52 is rotatably connected to the inner walls of the left and right sides of the engaging cavity 13, a transition gear 54 is fixedly connected to the transition shaft 52 and is in meshing engagement with the engaging gear 55, the transition shaft 52 is in driving connection with the worm shaft 56 via a pulley, the control motor 35 is actuated according to the size of the inner wall of the conduit 32, so that the suction cup 46 is rotated by the rotation of the turntable 45, the suitable sanding disk 47 is rotated to the left of the mounting plate 74, the conduit 32 is placed, the wedge block 41 is moved backward, and the control block 39 is moved upward via the coupling plate 42, thereby causing the suction cup 46 to be detached from the grinding disc 47, and the driving motor 17 is driven to rotate in reverse, so that the engaging shaft 53 is rotated by bevel gear transmission, so that the engaging gear 55 is rotated by the rotation of the slave ratchet wheel 72, so that the transition shaft 52 is rotated by the transition gear 54, so that the worm shaft 56 is rotated by pulley transmission, so that the fixed gear 58 is rotated by the worm shaft 56, so that the moving plate 60 is moved leftward by the rotation of the cam 59, so that the grinding disc 47 is moved leftward, so that the slave friction block 48 is frictionally engaged with the master friction block 44.

In the initial state, the top pressure spring 29, the control spring 43 and the return spring 61 are in the natural extension state, and the suction cup 46 is in contact with the polishing disk 47.

When the pipeline cleaning machine starts to work, the control motor 35 is started according to the size of the inner wall of the pipeline 32, so that the suction cup 46 is driven to rotate through the rotation of the rotary disc 45, the proper grinding disc 47 is driven to rotate to the left part of the mounting plate 74, the pipeline 32 is placed in the pipeline, the wedge block 41 is driven to move backwards, the control block 39 is driven to move upwards through the connecting plate 42, so that the suction cup 46 and the grinding disc 47 are separated from adsorption, then the pipeline 32 is sent between the left supporting block 31 and the pipeline 32, the control motor 35 is started, so that the moving frame 38 is driven to move rightwards through the rotation of the eccentric wheel 37 and is matched with the left supporting block 31 under the action of the jacking spring 29, so that the right supporting block 33 and the left supporting block 31 clamp and fix the pipeline 32, the driving motor 17 is started to rotate reversely, so that the connecting shaft 53 is driven to rotate through the, thereby rotating the transition shaft 52 via the transition gear 54, rotating the worm shaft 56 via the pulley transmission, rotating the fixed gear 58 via the worm shaft 56, moving the moving plate 60 to the left via the rotation of the cam 59, moving the sanding disc 47 to the left, and frictionally engaging the secondary pad 48 with the primary pad 44; the driving motor 17 is started to rotate forwardly, so that the main gear 19 is driven to rotate by the main ratchet wheel 71, the main friction block 44 is driven to rotate by the main gear 21, the connecting shaft 53 is driven to rotate by bevel gear transmission, the rotating wheel 66 is driven to rotate intermittently by the rotation of the rotating plate 70 and under the action of the connecting rod 69 and the connecting plate 67, the lifting block 28 is driven to move intermittently upwards or downwards by the input wheel 63, the output wheel 49 and the transmission chain 50, the polishing disc 47 is driven to rotate by the friction connection of the main friction block 44 and the driven friction block 48, the inner wall of the pipeline is polished by the polishing head driven by the main friction block 44, the transmission shaft 22 is driven to rotate by the belt wheel transmission, the connecting shaft 23 is driven to rotate by the bevel gear transmission, and residues generated by polishing are driven to enter the dust suction cavity 16 through the through hole 26 by the.

The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a adapt to different bore pipeline inner wall grinding device, includes the organism, its characterized in that: the machine body is internally provided with a transmission cavity, a lifting groove is arranged above the transmission cavity, a transition cavity is arranged on the right side of the lifting groove, a connecting cavity is arranged on the right side of the transition cavity, a working cavity is arranged above the lifting groove, a dust absorption cavity is arranged on the left side of the lifting groove, the inner wall of the bottom side of the transmission cavity is rotationally connected with a spline shaft extending up and down, a spline sleeve is in spline fit on the spline shaft, a lifting block is in up-and-down sliding fit on the inner wall of the left side of the lifting groove, an inlet through a pipeline is arranged above the working cavity and outside, the lifting block is rotationally connected with the spline sleeve, a through hole is arranged between the dust absorption cavity and the working cavity, the upper end of the spline sleeve is fixedly connected with a main friction block positioned in the working cavity, the inner wall of the right side of the connecting cavity is rotationally connected with a connecting, the utility model discloses a pipeline polishing device, including transition chamber, connecting plate, rotating wheel, connecting cavity bottom side inner wall, the transition chamber right side inner wall rotates and is connected with the input shaft that extends about being connected with, rotate on the input shaft and be connected with the linking plate, fixedly connected with is located on the input shaft the rotating wheel on linking plate right side, linking plate right-hand member articulates there is the drive rotating wheel that can drive rotating wheel intermittent type pivoted pawl board, linking plate right-hand member articulate have with rotating plate articulated connecting rod, transmission chamber bottom side inner wall rotates and is connected with the transmission shaft that extends from top to bottom, it is right to be provided with in the working chamber be used for the pipeline press from both sides tight fixed subassembly of.

2. The device for polishing the inner walls of pipelines with different calibers, according to claim 1, is characterized in that: the inner wall polishing component also comprises a driving motor fixedly arranged on the inner wall at the bottom side of the transmission cavity, the tail end of the driving motor is provided with a driving shaft extending up and down, the spline shaft is fixedly connected with a main gear, the driving motor is rotatably connected with a main gear which is provided with a cavity and is meshed with the main gear, the driving shaft is fixedly connected with a main ratchet wheel which can be rotatably connected with the main gear, the driving shaft is in transmission connection with the linking shaft through a bevel gear, the input shaft is fixedly connected with an input wheel positioned in the lifting groove, the inner wall at the right side of the transition cavity is rotatably connected with an output shaft extending left and right, the tail end of the output shaft is fixedly connected with an output wheel positioned in the lifting groove, the input wheel is rotatably connected with the output wheel through a transmission chain, the left end of the transmission chain is fixedly connected with a sliding block, and the right end of, the inner wall of the left side of the dust absorption cavity is rotatably connected with a connecting shaft extending leftwards and rightwards, the connecting shaft is in transmission connection with the transmission shaft through a bevel gear, the spline shaft is in transmission connection with the transmission shaft through a belt wheel, fan blades are fixedly connected to the right end of the connecting shaft, and filter plates are fixedly mounted on the inner walls of the upper side and the lower side of the dust absorption cavity.

3. The device for polishing the inner walls of pipelines with different calibers, according to claim 1, is characterized in that: the clamping and fixing component comprises a left sliding plate which is connected with the inner wall of the rear side of the working cavity in a left-right sliding manner, the left end of the left sliding plate is provided with a jacking spring fixedly mounted with the inner wall of the left side of the working cavity, the right end of the left sliding plate is provided with a left supporting block used for adjusting the position of the pipeline, the inner wall of the top side of the working cavity is fixedly mounted with a control motor, the tail end of the control motor is provided with a control shaft which extends up and down, the control shaft is in spline fit with a control sleeve, the control sleeve is in rotary connection with a control block of which the right end is in up-down sliding connection with the inner wall of the right side of the working cavity, the control shaft is fixedly connected with an eccentric wheel, the inner wall of the rear side of the working cavity is in left-right sliding connection with a moving frame which is matched with the eccentric wheel, the left end, the inner wall of the left side of the working cavity is connected with a wedge block which can be driven by the pipeline to move backwards in a front-back sliding mode, the rear end of the wedge block is provided with a control spring fixedly installed on the inner wall of the rear side of the working cavity, and the right end of the wedge block is fixedly connected with a connecting plate which is abutted to the control block.

4. The device for polishing the inner walls of pipelines with different calibers according to claim 3, wherein: the polishing head mounting assembly comprises a turntable fixedly connected with the lower end of the control sleeve, the lower end of the turntable is fixedly connected with a plurality of suckers, a mounting plate is fixedly arranged on the inner wall of the bottom side of the right part of the working cavity, a plurality of auxiliary friction blocks in friction fit with the main friction blocks can be rotated at the upper end of the mounting plate, the polishing discs with different sizes are fixedly arranged at the upper end of the auxiliary friction block and can be adsorbed by the sucker, the inner walls of the left side and the right side of the connecting cavity are rotationally connected with worm shafts, the inner walls of the front side and the rear side of the connecting cavity are rotationally connected with fixed shafts, the fixed shaft is fixedly connected with a fixed gear in threaded fit with the worm shaft, the inner wall of the front side of the working cavity is connected with a moving plate for pushing the polishing disc in a left-right sliding manner, the right end of the moving plate is provided with a return spring fixedly connected with the inner wall of the right side of the working cavity, and the fixed shaft is fixedly connected with a cam matched with the moving plate.

5. The device for polishing the inner walls of pipelines with different calibers according to claim 4, is characterized in that: the polishing head mounting assembly further comprises a connecting gear which is rotatably connected with the connecting shaft and is provided with a cavity, the connecting shaft is fixedly connected with a driven ratchet wheel which can drive the connecting gear to rotate, the inner walls of the left side and the right side of the connecting cavity are rotatably connected with a transition shaft, the transition shaft is fixedly connected with a transition gear which is in meshed connection with the connecting gear, the transition shaft is in transmission connection with the worm shaft through a belt wheel, the control motor is started according to the size of the inner wall of the pipeline, and therefore the rotating disc is rotated to drive the sucker to rotate, and the appropriate polishing disc is driven to rotate to the left portion of the mounting plate.