A device for polishing the inner wall of a sleeve chimney

Abstract

The application discloses a kind of inner wall polishing device of sleeve chimney, it is related to chimney inner wall polishing field, including polishing disc and two walking disc, polishing disc coaxial setting between two walking disc, walking disc rotation connects polishing disc, the side wall of polishing disc is spaced apart and is provided with multiple radial slide rods along the circumferential direction of itself, radial slide rod is slidably installed in polishing disc, the end of radial slide rod away from polishing disc is fixed with polishing seat, and polishing roller is rotationally arranged on polishing seat, the side wall of walking disc is spaced apart and is provided with multiple radial walking rods along the circumferential direction of itself, radial walking rod is slidably installed in walking disc, radial walking rod and radial slide rod all have the freedom of movement along the radial direction of polishing disc, the end of radial walking rod away from walking disc is fixed with walking seat, and rubber wheel is rotationally installed on walking seat, the axis of rubber wheel is perpendicular to the axis of polishing roller, can cross the annular flange of outer cylinder chimney, realize uninterrupted continuous polishing.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chimney inner wall polishing, in particular to a sleeve chimney inner wall polishing device. BACKGROUND

[0002] In the industrial fields of thermal power generation, steel smelting, chemical synthesis, waste incineration, etc., the sleeve chimney, as a special flue gas discharge facility for core equipment such as boilers, incinerators, and reaction kettles, has a unique structure design of "multi-layer sleeve nesting", which is different from the traditional single-cylinder chimney, and has become a key supporting equipment for dealing with high-temperature and high-corrosion flue gas discharge requirements. The sleeve chimney is composed of an outer cylinder chimney and an inner cylinder chimney, and the outer cylinder chimney includes multiple outer cylinders connected by flanges, and the inner cylinder chimney includes multiple inner cylinders connected by flanges. The connection between the inner cylinder and the outer cylinder needs to rely on the flange positioning structure to realize stable assembly: an annular flange is fixed on the inner wall of the outer cylinder, which is a ring-shaped metal member welded or bolted to the inner wall of the outer cylinder, and its inner diameter is slightly larger than the outer diameter of the inner cylinder; correspondingly, an external flange is welded on the outer wall of the inner cylinder at the matching position of the outer cylinder annular flange, and after the inner cylinder is hoisted into the outer cylinder, the external flange of the inner cylinder is tightly connected with the annular flange of the outer cylinder wall by bolts.

[0003] The inner wall of the outer cylinder chimney and the inner wall of the inner cylinder chimney need to be sprayed with a corrosion-resistant coating. Since the adhesion, uniformity and durability of the coating all require a flat and clean base as a prerequisite, the inner wall of the outer cylinder chimney and the inner wall of the inner cylinder chimney need to be polished before spraying the coating to remove burrs, protrusions and other defects on the inner wall. Since the outer cylinder chimney has an annular flange fixed on its inner wall, it is difficult to polish the inner wall of the outer cylinder chimney, which makes the existing polishing robot unable to cross the annular flange and unable to achieve continuous polishing action. In addition, the existing walking type polishing robot is limited by its own structure, and the coverage range of a single polishing is very small, usually only covering a circular area with a diameter of 1-2m centered on the robot, and needs to be gradually pushed forward by axial movement and radial adjustment. For an outer cylinder annular area with a circumference of more than 30m, the robot needs to start and stop frequently and adjust the position, which not only has very low efficiency, but also is more likely to cause overlapping or missing of the annular area due to multiple positioning deviations, resulting in uneven surface roughness and failing to meet the precision requirements of coating pretreatment. Although manual polishing can cross the annular flange for polishing, the size of the outer cylinder chimney is very large, so the efficiency of manual polishing is very low and the labor intensity is very high.

[0004] In summary, the physical blockage of the annular flange on the inner wall of the outer cylinder makes the existing robot unable to advance in full section, and the extremely large size of the annular area makes it difficult for the existing walking type robot to achieve full coverage, which together causes the corrosion-resistant coating pretreatment of the outer cylinder inner wall to fail to meet the standards, thereby shortening the service life of the outer cylinder and increasing the operation and maintenance cost. SUMMARY

[0005] The polishing device for the inner wall of a sleeve chimney can cross the annular flange of an outer cylinder chimney, and continuously polish without interruption.

[0006] The polishing device for the inner wall of a sleeve chimney comprises a polishing disc and two walking discs, the polishing disc is coaxially arranged between the two walking discs, the walking discs are rotationally connected to the polishing disc, the side wall of the polishing disc is provided with a plurality of radial sliding rods at intervals along the circumferential direction of the polishing disc, the radial sliding rods are slidingly installed on the polishing disc, the end of the radial sliding rod away from the polishing disc is fixed with a grinding seat, the grinding seat is rotationally provided with a grinding roller, the side wall of the walking disc is provided with a plurality of radial walking rods at intervals along the circumferential direction of the walking disc, the radial walking rods are slidingly installed on the walking disc, the radial walking rods and the radial sliding rods both have the freedom of moving along the radial direction of the polishing disc, the end of the radial walking rod away from the walking disc is fixed with a walking seat, the walking seat is rotationally installed with a rubber wheel, and the axis of the rubber wheel is perpendicular to the axis of the grinding roller.

[0007] Further, the polishing disc is coaxially provided with an annular cavity, the annular cavity is coaxially provided with an annular shaft, the annular shaft is rotationally connected to the polishing disc through a bearing, the annular shaft is sleeved with an outer gear ring and a worm wheel, each radial sliding rod is provided with a planetary gear, the planetary gear is rotationally connected to the polishing disc, the side wall of the polishing disc is provided with a through hole at the position where the radial sliding rod is arranged, the through hole is communicated with the annular cavity, the radial sliding rod penetrates into the annular cavity through the through hole, one side of the radial sliding rod is fixed with a rack, the rack and the outer gear ring are staggered arranged along the axial direction of the polishing disc, the planetary gear simultaneously engages with the outer gear ring and the rack, the worm wheel engages with a worm, the worm is rotationally connected to the polishing disc, and the side wall of the polishing disc is installed with a first motor.

[0008] Further, the radial sliding rod comprises a telescopic rod and a pressure rod, the end of the telescopic rod away from the polishing disc is provided with a pressure hole, the telescopic rod is provided with a pressure cavity, the pressure cavity is installed with a first pressure sensor, one end of the pressure rod is movably penetrated into the pressure cavity through the pressure hole and contacts the pressure shaft of the first pressure sensor, the other end of the pressure rod is fixedly connected to the grinding seat, the grinding seat is installed with a grinding motor, the output shaft of the grinding motor is transmissionally connected to the grinding roller, and a limiting ring is fixedly sleeved on the pressure rod and abuts against the inner wall of the pressure cavity away from the polishing disc.

[0009] Further, the telescopic rod comprises a first rod and a second rod, one end of the first rod is slidingly installed on the polishing disc, the other end of the first rod is provided with a pre-pressing groove, one end of the second rod is slidingly fitted in the pre-pressing groove, the pressure rod is arranged at the other end of the second rod, the pre-pressing spring is arranged in the pre-pressing groove, and the two ends of the pre-pressing spring are connected with the first rod and the second rod respectively.

[0010] Further, the walking disc is coaxially provided with an annular driving cavity, a hollow shaft is rotatably installed in the annular driving cavity, a driving gear and a driving worm are sleeved on the hollow shaft, each radial walking rod is provided with a driven shaft, a long shaft gear is key-connected to the driven shaft, the walking disc is provided with a side hole at the position where the radial walking rod is arranged, the side hole is communicated with the annular driving cavity, the radial walking rod penetrates into the annular driving cavity through the side hole, a driving rack is fixed to one side of the radial walking rod, the long shaft gear is engaged with the driving gear and the driving rack at the same time, the driving worm is engaged with the driving worm, the driving worm is rotatably connected to the walking disc, a second motor is installed on the side wall of the walking disc, and the output shaft of the second motor is drivingly connected with the driving worm.

[0011] Further, the radial walking rod comprises a walking main rod and a pressure detection rod, one end of the walking main rod away from the walking disc is slidingly provided with the pressure detection rod, one end of the pressure detection rod away from the walking main rod is connected with a walking seat, the walking main rod is provided with a detection chamber, the second pressure sensor is installed in the detection chamber, the pressure detection rod contacts the pressure shaft of the second pressure sensor, and a large-diameter ring is fixedly sleeved on the pressure detection rod and abuts against the inner wall of the detection chamber away from the walking disc.

[0012] Further, the traction driving mechanism comprises a counterweight base and a driving plate, the driving plate is installed on the top of the counterweight base, a winding shaft is rotatably connected to the end face of the driving plate away from the walking disc, a traction motor is installed on the driving plate, the output shaft of the traction motor is drivingly connected with the winding shaft, a traction rope is wound on the winding shaft, a wire passing groove is formed in the driving plate, an upper V-shaped wheel and a lower V-shaped wheel are rotatably connected in the wire passing groove, the traction rope passes between the upper V-shaped wheel and the lower V-shaped wheel, a spring buckle is connected to the traction rope, and a lifting ring is fixed to the center of one of the walking discs.

[0013] Further, the top of the counterweight base is horizontally provided with a first air cylinder, a horizontal sliding plate is connected to the telescopic shaft of the first air cylinder, the horizontal sliding plate slidingly contacts the counterweight base, a second air cylinder is vertically installed on the top of the horizontal sliding plate, and the telescopic shaft of the second air cylinder is connected with the driving plate.

[0014] Further, the walking disc near one end of the polishing disc is coaxially fixed with a hollow drive shaft, the polishing disc is provided with an annular groove at each axial end, the annular groove is provided with a drive bearing, the outer ring of the drive bearing is fixedly connected with the polishing disc, and the hollow drive shaft is keyed connected with the inner ring of the drive bearing.

[0015] Further, one of the walking discs is provided with a drive motor near one end of the polishing disc, the drive motor is located in the hollow drive shaft, the polishing disc is coaxially fixed with a main shaft near one end of the drive motor, and the output shaft of the drive motor is drivingly connected with the main shaft through a shaft coupling.

[0016] The beneficial effects of the present application are:

[0017] 1. The radial walking rods are moved to adapt to the inner diameter of the outer cylinder chimney, the rubber wheels contact the inner wall of the outer cylinder chimney, the polishing disc is coaxially arranged in the outer cylinder chimney, the radial sliding rods drive the polishing rollers to contact the inner wall of the outer cylinder chimney, the deflection of the polishing disc enables the multiple polishing rollers to form an annular polishing path to cover the annular area of the outer cylinder chimney, the traction driving mechanism drives the polishing disc to move along the axial direction of the outer cylinder chimney, the annular polishing path formed by the multiple polishing rollers moves along the axial direction of the outer cylinder chimney, and the inner wall of the outer cylinder chimney is fully polished.

[0018] 2. The walking discs are arranged at each axial end of the polishing disc, when the annular flange of the outer cylinder chimney is needed to pass through, the radial walking rods on the front walking disc are retracted, the rubber wheels are simultaneously moved to the center of the walking disc, the annular diameter formed by the multiple rubber wheels is smaller than the inner diameter of the annular flange, the front walking disc can smoothly pass through the annular flange, the radial walking rods drive the rubber wheels to contact the inner wall of the outer cylinder chimney after passing through the annular flange, when the polishing disc runs to the annular flange, the radial sliding rods on the polishing disc are retracted, the radial walking rods on the rear walking disc are retracted, the front walking disc provides support, the polishing disc and the rear walking disc can smoothly pass through the annular flange, the annular flange can be automatically crossed for uninterrupted and continuous polishing operation, and the "missing polishing area" formed by the flange blockage of the existing robot is completely eliminated, thereby providing a full-length flat base for the anticorrosive coating of the inner wall of the outer cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a partial structure diagram of the inner wall polishing device of the sleeve chimney of the present application Figure 1 ;

[0020] Figure 2 It is a top view of the present application Figure 1 ;

[0021] Figure 3 It is a sectional view along A-A direction of the present application Figure 2 ;

[0022] Figure 4For Figure 3 Enlarged view at D;

[0023] Figure 5 For Figure 2 Sectional view at C-C;

[0024] Figure 6 For Figure 5 Enlarged view at E;

[0025] Figure 7 For Figure 2 Enlarged view at B-B;

[0026] Figure 8 Structure diagram of walking disc of inner wall polishing device of sleeve chimney of the present application;

[0027] Figure 9 Structure diagram of local structure of inner wall polishing device of sleeve chimney of the present application Figure 2 ;

[0028] Figure 10 Working diagram of inner wall polishing device of sleeve chimney of the present application Figure 1 ;

[0029] Figure 11 Working diagram of inner wall polishing device of sleeve chimney of the present application Figure 2 ;

[0030] In the figure, 1-polishing disc, 2-traveling disc, 3-radial slide bar, 4-polishing seat, 5-polishing roller, 6-radial traveling bar, 7-traveling seat, 8-rubber wheel, 9-annular cavity, 10-annular shaft, 11-outer gear ring, 12-worm wheel, 13-planetary gear, 14-through hole, 15-rack, 16-worm, 17-first motor, 18-telescopic rod, 19-pressure rod, 20-pressure hole, 21-pressure cavity, 22-first pressure sensor, 23-polishing motor, 24-limit ring, 25-first stage rod, 26-second stage rod, 27-pre-pressing groove, 28-pre-pressing spring, 29-annular driving cavity, 30-hollow shaft, 31-driving gear, 32-driving worm wheel, 33-driven shaft, 34-long shaft gear, 35-side hole, 36-driving rack, 37-driving worm, 38-second motor, 39-traveling main rod, 40-detecting rod, 41-detecting cavity, 42-second pressure sensor, 43-large-diameter ring, 44-counterweight base, 45-driving plate, 46-winding shaft, 47-towing motor, 48-wire passing groove, 49-upper V-shaped wheel, 50-lower V-shaped wheel, 51-towing rope, 52-hanging ring, 53-first air cylinder, 54-horizontal slide plate, 55-second air cylinder, 56-hollow driving shaft, 57-driving bearing, 58-driving motor, 59-main shaft, 60-centering slide rod, 61-push disc, 62-distance measuring sensor, 63-deflection shaft, 64-flange gear, 65-flange worm wheel, 66-flange polishing cavity, 67-flange transmission shaft, 68-transmission gear, 69-flange rack, 70-flange radial rod, 71-arc-shaped friction plate, 72-flange worm, 73-third motor, 74-electric push rod, 75-positioning plate. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described in further detail below with reference to the accompanying drawings, but the protection scope of the present application is not limited to the following description.

[0032] Example One

[0033] As Figures 1 to 11As shown, a sleeve chimney inner wall polishing device, comprising a polishing disc 1 and two walking discs 2, the polishing disc 1 is coaxially arranged between the two walking discs 2, the walking disc 2 is rotationally connected with the polishing disc 1, the side wall of the polishing disc 1 is spaced apart in the circumferential direction and provided with a plurality of radial sliding rods 3, the radial sliding rod 3 is slidingly installed on the polishing disc 1, the end of the radial sliding rod 3 away from the polishing disc 1 is fixed with a grinding seat 4, the grinding seat 4 is rotationally provided with a grinding roller 5, the side wall of the walking disc 2 is spaced apart in the circumferential direction and provided with a plurality of radial walking rods 6, the radial walking rod 6 is slidingly installed on the walking disc 2, the radial walking rod 6 and the radial sliding rod 3 both have the freedom of moving in the radial direction of the polishing disc 1, the end of the radial walking rod 6 away from the walking disc 2 is fixed with a walking seat 7, the walking seat 7 is rotationally installed with a rubber wheel 8, the axis of the rubber wheel 8 is perpendicular to the axis of the grinding roller 5, the polishing disc 1 is driven to move inside the outer cylinder by the two walking discs 2, specifically, the inner wall polishing device is put into the outer cylinder, the plurality of radial walking rods 6 synchronously move outward, so that the radial walking rod 6 drives the rubber wheel 8 to contact the inner wall of the outer cylinder, the synchronous movement of the plurality of radial walking rods 6 arranges the polishing disc 1 coaxially in the outer cylinder, then the plurality of radial sliding rods 3 synchronously move outward, so that the grinding roller 5 contacts the inner wall of the outer cylinder, the axis of the rubber wheel 8 is perpendicular to the axis of the outer cylinder, so that the rubber wheel 8 moves along the axial direction of the outer cylinder as rolling friction, thereby smoothly driving the polishing disc 1 to move along the axial direction of the outer cylinder, while the axis of the grinding roller 5 is parallel to the axis of the outer cylinder, so that the grinding roller 5 moves along the circumferential direction of the outer cylinder as rolling friction, while the rubber wheel 8 moves along the circumferential direction of the outer cylinder as sliding friction, the friction is larger, so that the walking disc 2 will not rotate with the polishing disc 1, when the grinding roller 5 contacts the inner wall of the outer cylinder, the grinding roller 5 rotates at high speed to polish the inner wall of the outer cylinder, then the polishing disc 1 deflects, so that the grinding roller 5 moves along the circumferential direction of the outer cylinder, so that the plurality of grinding rollers 5 form an annular grinding path to cover the annular area of the outer cylinder chimney, then the polishing disc 1 is driven by the walking disc 2 to move along the axial direction of the outer cylinder, thereby gradually completing the grinding of the inner wall of the outer cylinder, when the annular flange of the outer cylinder chimney is needed to be passed through, the radial walking rod 6 on the front walking disc 2 is retracted, driving the plurality of rubber wheels 8 to synchronously move towards the center of the walking disc 2, at this time, the annular diameter formed by the plurality of rubber wheels 8 is smaller than the inner diameter of the annular flange, so that the front walking disc 2 can smoothly pass through the annular flange, after passing through the annular flange, the radial walking rod 6 drives the rubber wheel 8 to contact the inner wall of the outer cylinder chimney, so that the walking disc 2 continues to drive the polishing disc 1 to move forward, when the polishing disc 1 runs to the annular flange, the radial sliding rod 3 on the polishing disc 1 and the radial walking rod 6 on the rear walking disc 2 are retracted, the front walking disc 2 provides support, so that the polishing disc 1 and the rear walking disc 2 can smoothly pass through the annular flange, thereby automatically crossing the annular flange to continuously polish without interruption, completely eliminating the "missing polishing area" formed by the existing robot due to the blocking of the flange, and providing a full-length smooth base for the anticorrosive coating of the inner wall of the outer cylinder.In practice, to improve the polishing efficiency of the outer cylinder, while the inner wall polishing device is polishing the inner wall of the outer cylinder, the staff will connect the next outer cylinder to the back of the positive polishing outer cylinder through the flange, so that the inner wall polishing device can directly connect to the next outer cylinder for polishing. The appropriate number of outer cylinders can be connected for polishing according to the size of the site, saving the time of replacing the next outer cylinder and adjusting the inner wall polishing device. After a set of outer cylinders is polished, the polished outer cylinders are transported away, and the same method is used to polish the inner wall of the next set of outer cylinders, which further improves the polishing efficiency.

[0034] Example 2

[0035] Based on Example 1, such as Figures 1 to 3 As shown, a ring-shaped cavity 9 is coaxially arranged inside the polishing disc 1. A ring-shaped shaft 10 is coaxially arranged inside the ring-shaped cavity 9. The ring-shaped shaft 10 is rotatably connected to the polishing disc 1 via bearings. An external gear ring 11 and a worm gear 12 are fitted on the ring-shaped shaft 10. Each radial slide rod 3 is equipped with a planetary gear 13, which is rotatably connected to the polishing disc 1. A through hole 14 is opened on the side wall of the polishing disc 1 at the location where the radial slide rod 3 is located. The through hole 14 connects to the ring-shaped cavity 9. The radial slide rod 3 passes through the through hole 14 and enters the ring-shaped cavity 9. A rack 15 is fixed to one side of the radial slide rod 3. The rack 15 and the external gear ring 11 are arranged alternately along the axial direction of the polishing disc 1. The planetary gear 13 simultaneously meshes with the external gear ring 11 and the rack 15. The worm gear 12 meshes with a worm 16, which is rotatably connected to the polishing disc 1. A first motor 17 is installed on the side wall of the polishing disc 1. The output shaft of the first motor 17 is connected to the worm 16. The first motor 17 drives the worm gear 16 to rotate, which in turn drives the annular shaft 10 to rotate via the worm wheel 12. The annular shaft 10 drives the outer gear ring 11 to rotate, which in turn drives the planetary gear 13 to rotate. The planetary gear 13, through meshing with the rack 15, drives the radial slide bar 3 to move linearly along the radial direction of the polishing disc 1, allowing the polishing roller 5 to move outward to contact the inner wall of the outer cylinder, and also to move inward to retract and pass through the annular flange of the outer cylinder. The meshing between the worm wheel 12 and the worm gear 16 has a self-locking capability to prevent the radial slide bar 3 from moving back. At the same time, it can adjust the unfolding diameter of the polishing roller 5 to adapt to outer cylinders of various inner diameters and complete the polishing operation of various models of outer cylinders. It is worth noting that the inner wall polishing device of this application is not limited to the polishing of outer cylinders, but can also polish products with annular inner holes. It can complete the polishing operation whether the inner wall is unobstructed or obstructed, and has a wide range of applications.

[0036] Example 3

[0037] Because the inner wall dimensions of the outer cylinder have a certain error, in order to ensure that the contact pressure between each grinding roller 5 and the inner wall of the outer cylinder meets the polishing pressure requirements, therefore, based on Example 2, as follows: Figures 1 to 4As shown, the radial slide rod 3 includes a telescopic rod 18 and a pressure rod 19, the telescopic rod 18 is provided with a pressure hole 20 at one end away from the polishing disc 1, the telescopic rod 18 is provided with a pressure cavity 21, the first pressure sensor 22 is installed in the pressure cavity 21, one end of the pressure rod 19 is movably inserted into the pressure cavity 21 through the pressure hole 20 and contacts the pressure shaft of the first pressure sensor 22, the other end of the pressure rod 19 is fixedly connected with the polishing seat 4, the polishing motor 23 is installed on the polishing seat 4, the output shaft of the polishing motor 23 is drivingly connected with the polishing roller 5, the polishing roller 5 is driven by the polishing motor 23 to rotate at a high speed to complete the polishing of the inner wall of the outer cylinder, the limiting ring 24 is fixedly sleeved on the pressure rod 19, the limiting ring 24 abuts against the inner wall of the pressure cavity 21 away from the polishing disc 1, the telescopic rod 18 includes a primary rod 25 and a secondary rod 26, one end of the primary rod 25 is slidingly installed on the polishing disc 1, the other end of the primary rod 25 is provided with a pre-pressing groove 27, one end of the secondary rod 26 is slidingly fitted in the pre-pressing groove 27, the pressure rod 19 is arranged at the other end of the secondary rod 26, the pre-pressing spring 28 is arranged in the pre-pressing groove 27, and the two ends of the pre-pressing spring 28 are respectively connected with the primary rod 25 and the secondary rod 26, the polishing pressure value is pre-set on the first pressure sensor 22, the plurality of radial slide rods 3 synchronously drive the polishing roller 5 to contact the inner wall of the outer cylinder, after the polishing roller 5 contacts the inner wall of the outer cylinder, the radial slide rod 3 continues to move outward, at this time, the secondary rod 26 compresses the pre-pressing spring 28 to move into the primary rod 25, the polishing roller 5 is abutted against the inner wall of the outer cylinder through the reaction force of the pre-pressing spring 28, the contact pressure between the polishing roller 5 and the inner wall of the outer cylinder acts on the first pressure sensor 22 through the pressure rod 19, so that the pressure of the polishing roller 5 acting on the inner wall of the outer cylinder can be accurately reflected, due to the size error of the inner wall of the outer cylinder, the polishing pressure of part of the polishing rollers 5 reaches the pre-set value, and the polishing pressure of part of the polishing rollers 5 is less than the pre-set value, at this time, the radial slide rod 3 continues to move outward, so that the pressure detected by all the first pressure sensors 22 reaches the pre-set value, at this time, the contact pressure between part of the polishing rollers 5 and the inner wall of the outer cylinder exceeds the pre-set value, which does not affect the polishing of the inner wall of the outer cylinder, can effectively remove burrs, protrusions and other problems, and makes the friction degree of the inner wall of the outer cylinder meet the requirements. In specific implementation, since the polishing roller 5 is uniformly arranged in the circumferential direction of the polishing disc 1, the polishing disc 1 does not need to rotate a whole circle to make the polishing roller 5 cover the annular area of the outer cylinder, for example, if the radial slide rod 3 is arranged with four, then the polishing disc 1 only needs to be deflected by 90° to make the four groups of polishing rollers 5 cover the annular area of the outer cylinder, in order to ensure full coverage, deflection greater than 90° can be used, when the next annular area is polished, the polishing disc 1 is reset to complete the polishing of the next annular area, the polishing disc 1 adopts the reciprocating deflection mode to complete the polishing of the inner wall of the outer cylinder, so that the polishing disc 1 does not need to rotate a whole circle, avoiding the problem of winding, and improving the polishing efficiency.

[0038] Example Four

[0039] On the basis of example three,Figures 1 to 8 As shown, the walking disc 2 is coaxially fixed with a hollow drive shaft 56 near one end of the polishing disc 1, and the polishing disc 1 is provided with an annular groove at each axial end, and the annular groove is provided with a drive bearing 57, the outer ring of the drive bearing 57 is fixedly connected with the polishing disc 1, and the hollow drive shaft 56 is keyed connected with the inner ring of the drive bearing 57, the walking disc 2 and the polishing disc 1 are assembled together by the cooperation of the hollow drive shaft 56 and the drive bearing 57, the rotation degree of freedom of the walking disc 2 is limited by the high friction generated between the rubber wheel 8 and the inner wall of the outer cylinder, so that the polishing disc 1 can rotate relative to the walking disc 2 to drive the polishing roller 5 to complete the polishing operation of the inner wall of the outer cylinder; one end of one walking disc 2 near the polishing disc 1 is provided with a drive motor 58, the drive motor 58 is located in the hollow drive shaft 56, one end of the polishing disc 1 near the drive motor 58 is coaxially fixed with a main shaft 59, the output shaft of the drive motor 58 is transmissionally connected with the main shaft 59 through a shaft coupling, the main shaft 59 is deflected by the drive motor 58, the polishing disc 1 is deflected by the main shaft 59, so as to drive the polishing roller 5 to deflect and complete the polishing operation.

[0040] Example five

[0041] On the basis of example four, as shown, Figures 1 to 5 The walking disc 2 is coaxially provided with an annular drive cavity 29, the annular drive cavity 29 is rotationally provided with a hollow shaft 30, the hollow shaft 30 is provided with a drive gear 31 and a drive worm 32, each radial walking rod 6 is provided with a driven shaft 33, the driven shaft 33 is keyed connected with a long shaft gear 34, the walking disc 2 is provided with a side hole 35 at the position where the radial walking rod 6 is arranged, the side hole 35 is communicated with the annular drive cavity 29, the radial walking rod 6 penetrates into the annular drive cavity 29 through the side hole 35, one side of the radial walking rod 6 is fixedly provided with a drive rack 36, the long shaft gear 34 is simultaneously engaged with the drive gear 31 and the drive rack 36, the drive worm 32 is engaged with a drive worm 37, the drive worm 37 is rotationally connected with the walking disc 2, the walking disc 2 is provided with a second motor 38 on the side wall, the output shaft of the second motor 38 is transmissionally connected with the drive worm 37, the second motor 38 drives the drive worm 37 to rotate, the drive worm 37 drives the drive worm 32 to rotate, the drive worm 32 drives the hollow shaft 30 to rotate, the hollow shaft 30 drives the drive gear 31 to rotate, the drive gear 31 drives the long shaft gear 34 to rotate, the long shaft gear 34 drives the radial walking rod 6 to move along the radial direction of the walking disc 2 through the engagement with the drive rack 36, the radial walking rod 6 moves away from or close to the center of the walking disc 2 through the forward and reverse rotation of the second motor 38, so that the rubber wheel 8 can contact the inner wall of the outer cylinder to provide support and drive the polishing disc 1 to move along the axial direction of the outer cylinder.

[0042] Example six

[0043] On the basis of example five, as shown, Figures 1 to 6As shown, the radial walking rod 6 includes a walking main rod 39 and a pressure detection rod 40, the walking main rod 39 slides through the pressure detection rod 40 away from one end of the walking disc 2, the pressure detection rod 40 is connected to the walking seat 7 away from one end of the walking main rod 39, the walking main rod 39 is provided with a detection chamber 41, the second pressure sensor 42 is installed in the detection chamber 41, the pressure detection rod 40 contacts the pressure shaft of the second pressure sensor 42, the large diameter ring 43 is fixedly sleeved on the pressure detection rod 40, the large diameter ring 43 abuts against the inner wall of the detection chamber 41 away from the walking disc 2, the contact pressure of the rubber wheel 8 is preset on the second pressure sensor 42, when the rubber wheel 8 contacts the inner wall of the outer cylinder, the radial walking rod 6 continues to drive the rubber wheel 8 to extrude the inner wall of the outer cylinder, the contact pressure between the rubber wheel 8 and the inner wall of the outer cylinder is detected by the second pressure sensor 42, when the detection pressure of all the second pressure sensors 42 reaches the preset value, the second motor 38 stops moving, the friction between the rubber wheel 8 and the inner wall of the outer cylinder is adjusted by adjusting the positive pressure, so that the generated friction can limit the rotational freedom of the walking disc 2, so that the walking disc 2 only moves linearly along the axial direction of the outer cylinder, and the polishing work of the polishing roller 5 on the polishing disc 1 is more stable.

[0044] Example Seven

[0045] Since the rubber wheel 8 and the walking disc 2 are in deflection assembly, if only one motor is installed on one walking seat 7 to drive the rubber wheel to rotate, uneven stress will occur, which will cause the walking disc to be unable to walk normally, if one motor is configured for each rubber wheel, the cost is higher, at the same time, it is difficult to realize synchronization between the motors, secondly, due to the size error of the inner wall of the outer cylinder, the contact pressure of each rubber wheel is different, which will further affect the normal walking of the walking disc 2, therefore, on the basis of example six, the radial walking rod 6 is provided with a plurality of pressure detection rods 40, the pressure detection rods 40 are arranged in the walking main rod 39, the pressure detection rods 40 are connected to the walking seat 7 away from one end of the walking main rod 39, the pressure detection rods 40 contact the pressure shaft of the second pressure sensor 42, the large diameter ring 43 is fixedly sleeved on the pressure detection rod 40, the large diameter ring 43 abuts against the inner wall of the detection chamber 41 away from the walking disc 2, the contact pressure of the rubber wheel 8 is preset on the second pressure sensor 42, when the rubber wheel 8 contacts the inner wall of the outer cylinder, the radial walking rod 6 continues to drive the rubber wheel 8 to extrude the inner wall of the outer cylinder, the contact pressure between the rubber wheel 8 and the inner wall of the outer cylinder is detected by the second pressure sensor 42, when the detection pressure of all the second pressure sensors 42 reaches the preset value, the second motor 38 stops moving, the friction between the rubber wheel 8 and the inner wall of the outer cylinder is adjusted by adjusting the positive pressure, so that the generated friction can limit the rotational freedom of the walking disc 2, so that the walking disc 2 only moves linearly along the axial direction of the outer cylinder, and the polishing work of the polishing roller 5 on the polishing disc 1 is more stable. Figures 1 to 11As shown, the traction driving mechanism includes a counterweight base 44 and a driving plate 45 mounted on top of the counterweight base 44, a winding shaft 46 rotatably connected to an end of the driving plate 45 away from the end face of the walking disc 2, a traction motor 47 mounted on the driving plate 45, the output shaft of the traction motor 47 drivingly connected to the winding shaft 46, a traction rope 51 wound on the winding shaft 46, a wire passing groove 48 formed in the driving plate 45, an upper V-shaped wheel 49 and a lower V-shaped wheel 50 rotatably connected in the wire passing groove 48, the traction rope 51 passing between the upper V-shaped wheel 49 and the lower V-shaped wheel 50, a spring buckle connected to the traction rope 51, a lifting ring 52 fixed at the center of one walking disc 2, the spring buckle connected to the lifting ring 52, a first air cylinder 53 horizontally mounted on top of the counterweight base 44, a horizontal sliding plate 54 connected to the extension shaft of the first air cylinder 53, the horizontal sliding plate 54 slidingly contacting the counterweight base 44, a second air cylinder 55 vertically mounted on top of the horizontal sliding plate 54, the driving plate 45 connected to the extension shaft of the second air cylinder 55, the horizontal sliding plate 54 driven by the first air cylinder 53 to move, the driving plate 45 driven by the horizontal sliding plate 54 to adjust the horizontal position, the driving plate 45 driven by the second air cylinder 55 to adjust the vertical position, the traction rope 51 coaxial with the outer cylinder, the winding shaft 46 driven by the traction motor 47 to rotate, the traction rope 51 wound on the winding shaft 46, the walking disc 2 pulled forward by the traction rope 51, the entire inner wall polishing device moved, the device moved by the traction of the walking disc 2 in the middle, the stress evenly distributed, the movement more stable, the power source reduced, and the cost lowered.

[0046] Example Eight

[0047] On the basis of example seven, as Figures 1 to 11As shown, the space between the upper V-shaped wheel 49 and the lower V-shaped wheel 50 is the traction center. A centering mechanism is provided on the drive plate 45, which includes centering slide rods 60 and a push plate 61. Multiple centering slide rods 60 are evenly distributed around the circumference of the traction center. The centering slide rods 60 slide through the drive plate 45. A distance sensor 62 is installed on the outer wall of the centering slide rod 60 near the end of the traveling disc 2. The other end of the centering slide rod 60 is fixed to the push plate 61. Initially, the counterweight base 44 is moved to approximately the coaxial position of the outer cylinder. Then, the push plate 61 is pushed close to the outer cylinder, causing all the centering slide rods 60 to move into the inner wall of the outer cylinder. The distance sensor 62 detects the distance between the centering slide rods 60 and the inner wall of the outer cylinder. There are four centering slide rods 60, which are respectively arranged above, below, to the left, and to the right of the traction center. The position of the traction center is determined by the detection values ​​of the distance sensors 62 directly above and below. The second cylinder 55 is extended and retracted to make the detection values ​​of the distance sensors 62 directly above and below the same. The horizontal position of the traction center is determined by the detection values ​​of the distance sensors 62 directly to the left and right. The first cylinder 53 is extended and retracted to make the detection values ​​of the distance sensors 62 directly to the left and right the same. This completes the alignment adjustment between the traction center and the outer cylinder, making the traction rope 51 coaxial with the outer cylinder and the traction force of the inner wall polishing device coaxial with the outer cylinder, achieving stable movement. After the adjustment is completed, the push plate 61 is moved away from the traveling plate 2, causing the centering slide rod 60 to retract from the inside of the outer cylinder to avoid interference with the traveling plate 2.

[0048] Example 9

[0049] If the outer cylinder's annular flange is integrally formed, it also needs to be polished. The polishing positions for the annular flange are the two end faces along its axial direction. Since the axis of the polishing roller 5 is parallel to the axis of the outer cylinder, the polishing roller 5 can only polish the inner wall of the outer cylinder. Therefore, based on embodiment eight, if... Figures 1 to 7As shown, the polishing disc 1 is provided with two sets of flange polishing mechanisms, the radial slide rod 3 is located between the two sets of flange polishing mechanisms, two flange polishing cavities 66 are formed in the polishing disc 1, the annular cavity 9 is located between the two flange polishing cavities 66, the two sets of flange polishing mechanisms are respectively arranged in the two flange polishing cavities 66, the flange polishing mechanism comprises a deflection shaft 63, a flange gear 64 and a flange worm wheel 65, the deflection shaft 63 is rotationally connected to the polishing disc 1, the flange gear 64 and the flange worm wheel 65 are sleeved on the deflection shaft 63, a plurality of flange transmission shafts 67 are rotationally arranged around the flange gear 64, a transmission gear 68 is sleeved on the flange transmission shaft 67, the transmission gear 68 engages with the flange gear 64, the transmission gear 68 engages with a flange rack 69, the flange rack 69 is fixed with a flange radial rod 70, the flange radial rod 70 penetrates the side wall of the polishing disc 1 and is connected with an arc friction plate 71, the radius of the arc friction plate 71 is equal to the radius of the annular flange, and the radial width of the arc friction plate 71 is greater than the radial width of the annular flange, the flange worm wheel 65 engages with a flange worm 72, the flange worm 72 is rotationally connected to the polishing disc 1, one end of the flange worm 72 is drivingly connected to a third motor 73, the third motor 73 is mounted on the side wall of the polishing disc 1, the side wall of the polishing disc 1 is mounted with a distance sensor, the distance sensor is used to detect the distance of one arc friction plate 71, since the size of the annular flange is known, the position of the arc friction plate 71 is adjusted in advance so that the arc friction plate 71 approaches the inner wall of the outer cylinder but does not contact the inner wall of the outer cylinder, specifically, the third motor 73 drives the flange worm 72 to rotate, the flange worm 72 drives the flange worm wheel 65 to rotate, the flange worm wheel 65 drives the deflection shaft 63 to rotate, the deflection shaft 63 drives the transmission gear 68 to rotate through the flange gear 64, the engagement between the transmission gear 68 and the flange rack 69 drives the flange radial rod 70 to move, the extension distance of the arc friction plate 71 is detected by the distance sensor, so that the arc friction plate 71 cannot pass through the annular flange, when the arc friction plate 71 contacts the annular flange, the traction driving mechanism cannot continue to pull the inner wall polishing device forward, the torque of the traction motor 47 will gradually increase, a torque sensor is mounted on the output shaft of the traction motor 47, whether the inner wall polishing device runs to the position of the annular flange is judged by the torque sensor, so that the walking disc in front crosses the annular flange, and then the arc friction plate 71 contacts the annular flange and the inner wall of the outer cylinder, the reciprocating deflection of the polishing disc 1 makes the plurality of arc friction plates 71 cover the annular flange to complete the polishing work, the other end surface of the annular flange is polished by the rear flange polishing mechanism, an electric push rod 74 is mounted on the flange radial rod 70 in the rear flange polishing mechanism, a positioning plate 75 is connected to the extension shaft of the electric push rod 74, a hexagonal positioning column is fixed on the positioning plate 75, a hexagonal positioning groove and a large-diameter circular hole are sequentially formed in the arc friction plate 71, the diameter of the large-diameter circular hole is greater than the diameter of the circumscribed circle of the hexagonal positioning groove, the hexagonal positioning column is fitted in the hexagonal positioning groove and connected through a screw, the tail thread of the screw is fitted in the hexagonal positioning column, and the head of the screw is located in the large-diameter circular hole.When the polishing disc 1 passes through the annular flange, the electric push rod 74 drives the arc-shaped friction plate 71 to abut against the other end face of the annular flange, and the arc-shaped friction plate 71 is driven again by the reciprocating deflection of the polishing disc 1 to polish the other end face of the annular flange. The arc-shaped friction plate 71 is detachably connected, so that the arc-shaped friction plate 71 can be replaced according to the size of the annular flange, so that the radius of the arc-shaped friction plate 71 is equal to the radius of the annular flange, and the radial width of the arc-shaped friction plate 71 is greater than the radial width of the annular flange. The cooperation of the hexagonal positioning column and the hexagonal positioning groove enables the arc-shaped friction plate 71 to be coaxial with the polishing disc 1. Similarly, the flange radial rod 70 in the front flange polishing mechanism is fixed with a positioning column, the cross-sectional shape of the positioning column is a regular hexagon, the positioning column is fitted in the hexagonal positioning groove of the arc-shaped friction plate 71, and the positioning column is connected through screws, which facilitates the replacement of the arc-shaped friction plate 71 and enables the arc-shaped friction plate 71 to be coaxial with the polishing disc, so that the polishing of the annular flange can be completed.

Claims

1. A polishing device for the inner wall of a sleeve chimney, characterized in that, The device includes a polishing disc (1) and two traveling discs (2). The polishing disc (1) is coaxially arranged between the two traveling discs (2). The traveling discs (2) are rotatably connected to the polishing disc (1). The sidewall of the polishing disc (1) is provided with multiple radial slide rods (3) spaced apart along its circumference. The radial slide rods (3) are slidably mounted on the polishing disc (1). A grinding seat (4) is fixed to the end of the radial slide rod (3) away from the polishing disc (1). A grinding roller (5) is rotatably mounted on the grinding seat (4). The sidewall of the walking disc (2) is provided with a plurality of radial walking rods (6) spaced apart along its own circumference. The radial walking rods (6) are slidably mounted on the walking disc (2). Both the radial walking rods (6) and the radial slide rods (3) have the freedom to move radially along the polishing disc (1). The end of the radial walking rod (6) away from the walking disc (2) is fixed with a walking seat (7). A rubber wheel (8) is rotatably mounted on the walking seat (7). The axis of the rubber wheel (8) is perpendicular to the axis of the polishing roller (5). Two sets of flange polishing mechanisms are provided on the polishing disc (1). A radial slide bar (3) is located between the two sets of flange polishing mechanisms. Two flange polishing cavities (66) are formed inside the polishing disc (1). The two sets of flange polishing mechanisms are respectively set in the two flange polishing cavities (66). The flange polishing mechanism includes a deflection shaft (63), a flange gear (64), and a flange worm gear (65). The deflection shaft (63) is rotatably connected to the polishing disc (1). The flange gear (64) and the flange worm gear (65) are both mounted on the deflection shaft (63). Multiple flange drive shafts (67) are arranged around the flange gear (64). A drive gear (68) is mounted on the flange drive shaft (67). The drive gear (68) meshes with the flange gear (64). The drive gear (68) meshes with the flange rack (69). A flange radial rod (70) is fixed to a rack (69). The flange radial rod (70) extends from the side wall of the polishing disc (1) and is connected to an arc-shaped friction plate (71). The radius of the arc-shaped friction plate (71) is equal to the radius of the annular flange, and the radial width of the arc-shaped friction plate (71) is greater than the radial width of the annular flange. The flange worm gear (65) meshes with a flange worm (72). The flange worm (72) is rotatably connected to the polishing disc (1). One end of the flange worm (72) is connected to a third motor (73). The third motor (73) is installed on the side wall of the polishing disc (1). An electric push rod (74) is installed on the flange radial rod (70) in the rear flange polishing mechanism. The telescopic shaft of the electric push rod (74) is connected to a positioning plate (75). The arc-shaped friction plate (71) is installed on the positioning plate (75).

2. The inner wall polishing device for a sleeve chimney according to claim 1, characterized in that, The polishing disc (1) is coaxially provided with an annular cavity (9), and the annular cavity (9) is coaxially provided with an annular shaft (10). The annular shaft (10) is rotatably connected to the polishing disc (1) through a bearing. An external gear ring (11) and a worm gear (12) are fitted on the annular shaft (10). Each radial slide rod (3) is provided with a planetary gear (13), and the planetary gear (13) is rotatably connected to the polishing disc (1). The side wall of the polishing disc (1) has a through hole (14) at the position where the radial slide rod (3) is set. The through hole (14) communicates with the annular cavity (9). The radial slide bar (3) passes through the through hole (14) into the annular cavity (9). A rack (15) is fixed on one side of the radial slide bar (3). The rack (15) and the outer gear ring (11) are arranged alternately along the axial direction of the polishing disk (1). The planetary gear (13) meshes with the outer gear ring (11) and the rack (15) at the same time. The worm wheel (12) meshes with the worm (16). The worm (16) is rotatably connected to the polishing disk (1). A first motor (17) is installed on the side wall of the polishing disk (1). The output shaft of the first motor (17) is connected to the worm (16).

3. The inner wall polishing device for a sleeve chimney according to claim 1, characterized in that, The radial slide bar (3) includes a telescopic rod (18) and a pressure rod (19). The telescopic rod (18) has a pressure hole (20) at one end away from the polishing disc (1). The telescopic rod (18) has a pressure chamber (21) inside. A first pressure sensor (22) is installed in the pressure chamber (21). One end of the pressure rod (19) passes through the pressure hole (20) and moves into the pressure chamber (21), and contacts the pressure shaft of the first pressure sensor (22). The other end of the pressure rod (19) is fixedly connected to the grinding seat (4). A grinding motor (23) is installed on the grinding seat (4). The output shaft of the grinding motor (23) is connected to the grinding roller (5). A limiting ring (24) is fixedly sleeved on the pressure rod (19). The limiting ring (24) abuts against the inner wall of the pressure chamber (21) away from the polishing disc (1).

4. The inner wall polishing device for a sleeve chimney according to claim 3, characterized in that, The telescopic rod (18) includes a primary rod (25) and a secondary rod (26). One end of the primary rod (25) is slidably mounted on the polishing disc (1), and the other end is provided with a pre-pressure groove (27). One end of the secondary rod (26) is slidably fitted into the pre-pressure groove (27). The pressure rod (19) is set at the other end of the secondary rod (26). A pre-pressure spring (28) is provided in the pre-pressure groove (27). The two ends of the pre-pressure spring (28) are respectively connected to the primary rod (25) and the secondary rod (26).

5. The inner wall polishing device for a sleeve chimney according to claim 1, characterized in that, The traveling disc (2) is coaxially provided with an annular drive cavity (29), and a hollow shaft (30) is rotatably installed in the annular drive cavity (29). A drive gear (31) and a drive worm gear (32) are fitted on the hollow shaft (30). Each radial traveling rod (6) is provided with a driven shaft (33), and a long shaft gear (34) is keyed to the driven shaft (33). The traveling disc (2) has a side hole (35) at the position where the radial traveling rod (6) is set. The side hole (35) communicates with the annular drive cavity (29). The radial travel rod (6) passes through the side hole (35) into the annular drive cavity (29). A drive rack (36) is fixed on one side of the radial travel rod (6). The long shaft gear (34) meshes with the drive gear (31) and the drive rack (36) at the same time. The drive worm wheel (32) meshes with the drive worm (37). The drive worm (37) is rotatably connected to the travel disk (2). A second motor (38) is installed on the side wall of the travel disk (2). The output shaft of the second motor (38) is connected to the drive worm (37).

6. The inner wall polishing device for a sleeve chimney according to claim 5, characterized in that, The radial travel rod (6) includes a travel main rod (39) and a pressure detection rod (40). The pressure detection rod (40) is slidably inserted at the end of the travel main rod (39) away from the travel disk (2). The end of the pressure detection rod (40) away from the travel main rod (39) is connected to the travel seat (7). A detection chamber (41) is provided inside the travel main rod (39). A second pressure sensor (42) is installed inside the detection chamber (41). The pressure detection rod (40) contacts the pressure shaft of the second pressure sensor (42). A large diameter ring (43) is fixedly sleeved on the pressure detection rod (40). The large diameter ring (43) abuts against the inner wall of the detection chamber (41) away from the travel disk (2).

7. The inner wall polishing device for a sleeve chimney according to claim 1, characterized in that, It also includes a traction drive mechanism, which includes a counterweight base (44) and a drive plate (45). The drive plate (45) is mounted on the top of the counterweight base (44). A winding shaft (46) is rotatably connected to the end face of the drive plate (45) away from the traveling disc (2). A traction motor (47) is mounted on the drive plate (45). The output shaft of the traction motor (47) is connected to the winding shaft (46). A traction rope (51) is wound on the winding shaft (46). A wire groove (48) is opened on the drive plate (45). An upper V-shaped wheel (49) and a lower V-shaped wheel (50) are rotatably connected in the wire groove (48). The traction rope (51) passes between the upper V-shaped wheel (49) and the lower V-shaped wheel (50). A spring buckle is connected to the traction rope (51). A lifting ring (52) is fixed at the center of one of the traveling discs (2). The spring buckle is connected to the lifting ring (52).

8. The inner wall polishing device for a sleeve chimney according to claim 7, characterized in that, A first cylinder (53) is horizontally mounted on the top of the counterweight base (44). The telescopic shaft of the first cylinder (53) is connected to a horizontal sliding plate (54). The horizontal sliding plate (54) slides in contact with the counterweight base (44). A second cylinder (55) is vertically mounted on the top of the horizontal sliding plate (54). The telescopic shaft of the second cylinder (55) is connected to a drive plate (45).

9. The inner wall polishing device for a sleeve chimney according to claim 1, characterized in that, The walking disk (2) is coaxially fixed with a hollow drive shaft (56) at one end near the polishing disk (1). Both ends of the polishing disk (1) are provided with annular grooves. A drive bearing (57) is installed in the annular groove. The outer ring of the drive bearing (57) is fixedly connected to the polishing disk (1). The hollow drive shaft (56) is keyed to the inner ring of the drive bearing (57).

10. The inner wall polishing device for a sleeve chimney according to claim 9, characterized in that, One of the walking discs (2) is equipped with a drive motor (58) at one end near the polishing disc (1). The drive motor (58) is located inside the hollow drive shaft (56). The polishing disc (1) is coaxially fixed with a main shaft (59) at one end near the drive motor (58). The output shaft of the drive motor (58) is connected to the main shaft (59) via a coupling.

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