In-pipe round sand belt polishing device

Abstract

The application discloses a pipeline inner circle sand belt polishing device and relates to the technical field of inner circle polishing. The pipeline inner circle sand belt polishing device comprises a polishing conveying belt for driving the pipeline to rotate, a sand belt polishing mechanism and a driving mechanism. The sand belt polishing mechanism comprises a sand belt, a pressure polishing wheel and a driving wheel for driving the sand belt to rotate. The sand belt is sleeved on the pressure polishing wheel and the driving wheel. The driving mechanism drives the pressure polishing wheel to enter and exit the pipeline to be polished. In the application, the sand belt is driven to move by the driving wheel, and the pipeline is driven to rotate by cooperating with the polishing conveying belt. The polishing of the inner circle of the pipeline is completed by the sand belt. The polishing efficiency is improved. The centrifugal vibration problem during the polishing of the rotary grinding head and the step defect problem during the polishing of the telescopic grinding tool are avoided. The polishing effect is effectively improved. The design of the driving wheel and the pressure polishing wheel makes the pressure polishing wheel far away from the motor during the polishing. The stress of the motor shaft and the working environment of the motor are improved. The service life and the stability of the polishing device are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inner circle polishing, in particular to a pipeline inner circle abrasive belt polishing device. BACKGROUND

[0002] Pipeline inner wall polishing is one of the means to improve product quality. Taking steel pipes as an example, the current steel pipe inner wall polishing mostly uses a rotating grinding head / telescopic grinding tool to polish the steel pipe inner wall continuously.

[0003] Whether it is a rotating grinding head polishing or a telescopic grinding tool polishing, there are obvious defects. For the rotating grinding head polishing, since the motor is needed to drive the rotating grinding head to rotate, the rotating grinding head is prone to centrifugal vibration, which reduces the surface quality of the steel pipe inner wall under the influence of the centrifugal vibration. For the telescopic grinding tool polishing, not only is the telescopic structure limited in length and needs to be segmented for operation, but also a step is easily formed at the polishing junction when the pipe body direction is adjusted, which reduces the surface quality of the steel pipe inner wall.

[0004] Therefore, people urgently need a pipeline inner circle abrasive belt polishing device using abrasive belt flexible contact polishing technology. SUMMARY

[0005] The purpose of the present application is to provide a pipeline inner circle abrasive belt polishing device to solve the problems existing in the prior art, which uses an abrasive belt driven by a driving wheel to realize flexible contact polishing of the pipeline inner circle in cooperation with the rotation of the pipeline.

[0006] To achieve the above purpose, the present application provides the following scheme: the present application provides a pipeline inner circle abrasive belt polishing device, which comprises a polishing conveyor belt for driving the pipeline to rotate, an abrasive belt polishing mechanism and a driving mechanism. The abrasive belt polishing mechanism comprises an abrasive belt, a pressure grinding wheel and a driving wheel for driving the abrasive belt to rotate. The abrasive belt is sleeved on the pressure grinding wheel and the driving wheel. The driving mechanism drives the pressure grinding wheel to enter and exit the pipeline to be polished.

[0007] Preferably, the front end of the pressure grinding wheel is provided with a pipeline supporting mechanism, which comprises a limiting plate, a plurality of supporting arms, a driven gear, a driving gear and a variable diameter driving motor. The limiting plate is arranged at the front end of the pressure grinding wheel. A plurality of limiting grooves are arranged on the limiting plate in a diverging manner. The supporting arms are slidingly arranged in the limiting grooves. The driven gear is rotationally arranged at the front end of the limiting plate. Arc-shaped holes are arranged on the driven gear corresponding to the positions of the supporting arms. Limiting rods are arranged on the supporting arms. The limiting rods pass through the arc-shaped holes. The variable diameter driving motor drives the driven gear to rotate through the driving gear.

[0008] Preferably, the front end of the pressure grinding wheel is provided with a variable diameter screw rod transmission mechanism, the variable diameter screw rod transmission mechanism comprises a screw rod driving motor, a variable diameter screw rod and a screw rod sliding block, the screw rod driving motor is in transmission connection with the variable diameter screw rod, the screw rod sliding block is in threaded connection with the variable diameter screw rod, sliding guide rails are arranged on both sides of the screw rod sliding block, variable diameter sliding blocks are in sliding connection with the sliding guide rails, the limiting plates are connected with the variable diameter sliding blocks and / or the screw rod sliding block, and the variable diameter driving motor is connected with the variable diameter sliding blocks.

[0009] Preferably, the driving mechanism comprises a lifting movement mechanism, a linear movement mechanism and a swing mechanism which are connected in sequence, and the sand belt polishing mechanism is arranged on the swing mechanism.

[0010] Preferably, the lifting movement mechanism comprises a support, a lifting driving motor, a lifting screw rod and a platform support plate, the lifting screw rod is rotationally arranged on the support, the lifting screw rod is in transmission connection with the lifting driving motor, a transmission seat is in threaded connection with the lifting screw rod, and the transmission seat is connected with the platform support plate.

[0011] Preferably, the linear movement mechanism comprises a linear driving motor, a speed reducer, a transmission belt, a belt wheel, a linear guide rail and a sliding base, the linear driving motor drives the belt wheel to rotate through the speed reducer and the transmission belt, two belt wheels are arranged on the platform support plate, synchronous belts are arranged on the two belt wheels, the linear guide rail is arranged on the platform support plate, the sliding base is slidingly arranged on the linear guide rail, and the sliding base is connected with the synchronous belts.

[0012] Preferably, the swing mechanism comprises a swing base and a swing driving motor, the swing driving motor is arranged on the swing base, the swing base is provided with a central shaft, the central shaft is rotationally arranged on the swing base through a swing bearing seat, the swing driving motor is in transmission connection with the central shaft, and the swing base is provided with the driving wheel and the pressure grinding wheel.

[0013] Preferably, the swing base is further provided with a tensioning cylinder, a tensioning wheel and at least one auxiliary wheel for improving the transmission stability of the sand belt, the tensioning cylinder is connected with the tensioning wheel, and the tensioning wheel abuts against the inner circumferential wall of the sand belt.

[0014] Preferably, the polishing conveying belt comprises a plurality of transmission roller groups arranged in the axial direction of the pipeline to be polished, each transmission roller group comprises two transmission rollers, the axis of the transmission rollers is parallel to the axis of the pipeline to be polished, at least one of the transmission rollers is connected with a transmission motor to drive the pipeline to be polished to rotate.

[0015] Preferably, the pipe inner circle sand belt polishing device further comprises a clamping mechanism, the clamping mechanism comprises a clamping base, a clamping lifting seat, a rotating motor, a rotating base, a cylinder support arm, a clamping cylinder and a clamping wheel, the clamping lifting seat is movably arranged on the clamping base, the rotating motor is arranged on the clamping lifting seat, the cylinder support arm is connected with the rotating motor through the rotating base, and the cylinder support arm is provided with the clamping cylinder at an end away from the rotating base, the clamping cylinder is vertically telescopic, and the telescopic end of the clamping cylinder is rotationally connected with the clamping wheel through a clamping mounting seat.

[0016] The present application has the following technical effects compared with the prior art:

[0017] The driving wheel drives the sand belt to move, and the polishing conveying belt drives the pipe to rotate, so that the sand belt can polish the inner circle of the pipe, the polishing efficiency is improved, the centrifugal vibration problem of the rotary grinding head during polishing and the step defect problem of the telescopic grinding tool during polishing are avoided, the polishing effect is effectively improved, the driving wheel and the pressure grinding wheel are designed, the pressure grinding wheel is away from the motor during polishing, the stress of the motor shaft and the working environment of the motor can be improved, and the service life and stability of the polishing device can be improved.

[0018] The present application has the following technical effects compared with the prior art:

[0019] The pipe supporting mechanism can provide stable support for the polishing end of the sand belt, thereby improving the polishing effect, and the passive gear and the supporting arm can realize the sliding telescopic movement of the supporting arm in the limiting groove, thereby adjusting the outer diameter of the pipe supporting mechanism, so that the device can adapt to pipes with different diameters and pipes with variable diameters, and the application range of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is a structural schematic view of the pipe inner circle sand belt polishing device in the embodiment of the present application.

[0022] Figure 2 It is a structural schematic view of the clamping mechanism in the embodiment of the present application.

[0023] Figure 3 It is a structural schematic view of the lifting movement mechanism in the embodiment of the present application.

[0024] Figure 4 Structure diagram of the straight line motion mechanism in the embodiment of the present application;

[0025] Figure 5 Structure diagram of the straight line motion mechanism in the embodiment of the present application;

[0026] Figure 6 Structure diagram of the straight line motion mechanism in the embodiment of the present application;

[0027] Figure 7 Structure diagram of the straight line motion mechanism in the embodiment of the present application;

[0028] Figure 8 Structure diagram of the straight line motion mechanism in the embodiment of the present application;

[0029] Figure 9 Structure diagram of the straight line motion mechanism in the embodiment of the present application;

[0030] Figure 10 Structure diagram of the straight line motion mechanism in the embodiment of the present application;

[0031] 1, clamping mechanism; 2, polishing conveyor belt; 3, lifting motion mechanism; 4, straight line motion mechanism; 5, swing mechanism; 6, cylinder support arm; 7, rotating base; 8, rotating motor; 9, clamping lifting seat; 10, clamping base; 11, clamping cylinder; 12, clamping mounting seat; 13, clamping wheel; 14, platform support plate; 15, lifting screw; 16, bracket; 17, reverser; 18, lifting drive motor; 19, straight line guide rail; 20, sliding base; 21, pulley; 22, speed reducer; 23, straight line drive motor; 24, pipeline support mechanism; 25, grinding wheel; 26, first auxiliary wheel; 27, second auxiliary wheel; 28, swing base; 29, tension cylinder; 30, tension wheel; 31, drive wheel; 32, polishing drive motor; 33, swing bearing seat; 34, swing drive motor; 35, support arm; 36, driven gear; 37, variable diameter drive motor; 38, driving gear; 39, limit plate; 40, variable diameter screw; 41, screw block; 42, variable diameter block; 43, screw drive motor; 44, sliding guide rail; 45, support mechanism mounting plate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0033] The application aims to provide a pipe inner circle sand belt polishing device to solve the problems in the prior art.

[0034] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the application will be further described in detail below in combination with the drawings and specific embodiments.

[0035] Please refer to the drawings as Figures 1-10 shown, a pipe inner circle sand belt polishing device is provided, which comprises a polishing conveyor belt 2 for driving the pipe to rotate, a sand belt polishing mechanism and a driving mechanism. The sand belt polishing mechanism comprises a sand belt, a pressure polishing wheel 25 and a driving wheel 31 for driving the sand belt to rotate. The sand belt is sleeved on the pressure polishing wheel 25 and the driving wheel 31. The driving mechanism is used for driving the pressure polishing wheel 25 to enter and exit the pipe to be polished. The driving wheel 31 is driven by a corresponding polishing driving motor 32, thereby driving the sand belt to move. The movement of the sand belt is coupled with the rotation of the pipe, which can improve the polishing efficiency and effect. At the same time, since the motor does not directly drive the pressure polishing wheel 25, the pressure polishing wheel 25 is far away from the motor, which can improve the stress on the motor shaft and the working environment of the motor, and can improve the service life and stability of the polishing device.

[0036] The base material of the sand belt is cloth. When polishing, the cloth will be deformed to a certain extent to adapt to the surface state of the pipe to realize flexible contact polishing. At the same time, the pressure polishing wheel 25 behind the sand belt can be a rubber wheel. The rubber wheel also has a certain deformation amount, which improves the working condition adaptability and further realizes flexible contact polishing.

[0037] In an embodiment, the front end of the pressure grinding wheel 25 is provided with a pipeline supporting mechanism 24, which comprises a limiting plate 39, a plurality of supporting arms 35, a passive gear 36, a driving gear 38 and a variable-diameter driving motor 37. The limiting plate 39 is arranged at the front end of the pressure grinding wheel 25, which refers to the side of the pressure grinding wheel 25 away from the driving wheel 31. A plurality of limiting grooves are arranged on the limiting plate 39 in a diverging manner. The supporting arms 35 are slidingly arranged in the limiting grooves. The limiting grooves can limit the movement of the supporting arms 35 only along the direction of the limiting grooves (i.e. the length direction of the supporting arms 35). The passive gear 36 is rotatably arranged at the front end of the limiting plate 39. Specifically, a bearing can be arranged at the middle part of the limiting plate 39 to rotatably connect the gear shaft of the passive gear 36. The passive gear 36 is provided with arc-shaped holes at positions corresponding to the supporting arms 35. The number of the arc-shaped holes is the same as that of the supporting arms 35. The plurality of arc-shaped holes and the plurality of supporting arms 35 are uniformly distributed around the axis of the passive gear 36. The supporting arms 35 are provided with limiting rods, which pass through the arc-shaped holes. The variable-diameter driving motor 37 drives the passive gear 36 to rotate through the driving gear 38. When the passive gear 36 rotates, the limiting rods move along the arc-shaped holes due to the limiting action of the arc-shaped holes, so as to realize the extension and contraction of the supporting arms 35 in the limiting grooves, thereby adjusting the outer diameter of the overall pipeline supporting mechanism 24. The pipeline supporting mechanism 24 can adapt to pipelines with different diameters and can adapt to pipelines with variable diameters, thereby improving the application range of the device. Moreover, based on the design of the pipeline supporting mechanism 24, the distance between the pressure grinding wheel 25 and the driving wheel 31 can be extended, so that the pressure grinding wheel 25 does not shake during movement due to the excessive distance. At this time, the distance between the pressure grinding wheel 25 and the driving wheel 31 can be designed according to the length of the pipeline to be polished, so that the driving mechanism can send the pressure grinding wheel 25 to any position of the pipeline to be polished, thereby realizing continuous polishing.

[0038] The end of the supporting arm 35 away from the limiting plate 39 can be provided with a ball to reduce friction with the inner wall of the pipeline.

[0039] Since the plurality of support arms 35 are synchronous motion, the plurality of support arms 35 formed by the pipeline support mechanism 24 axis is the axis of the passive gear 36, thus need to be set in the front end of the grinding wheel 25 with variable diameter screw rod transmission mechanism, for adjusting the axis position of the pipeline support mechanism 24, in order to be coaxial with the pipe to be polished, achieve good support effect, specific: variable diameter screw rod transmission mechanism includes screw rod drive motor 43, variable diameter screw rod 40 and screw rod slider 41, screw rod drive motor 43 and variable diameter screw rod 40 transmission connection, screw rod slider 41 is threadedly connected on the variable diameter screw rod 40, both sides of the screw rod slider 41 are provided with sliding guide rail 44, the sliding guide rail 44 is slidably connected with variable diameter slider 42, the variable diameter slider 42 is connected with the screw rod slider 41 to produce synchronous motion, the limit plate 39 is connected with the variable diameter slider 42 and / or the screw rod slider 41, when the limit plate 39 is connected with the variable diameter slider 42 and the screw rod slider 41, the limit plate 39 represents the connection structure of the variable diameter slider 42 and the screw rod slider 41, when the limit plate 39 is connected with one of the variable diameter slider 42 and the screw rod slider 41, a separate connection structure needs to be provided to connect the variable diameter slider 42 and the screw rod slider 41, so as to realize the adjustment of the axis of the passive gear 36 by driving the movement of the screw rod slider 41, the variable diameter drive motor 37 needs to be connected with the variable diameter slider 42, and the limit plate 39 is connected with the limit plate 39 to produce synchronous motion, so as to ensure the meshing relationship between the driving gear 38 and the driven gear; in other embodiments, a linear telescopic cylinder can be used instead of the screw rod drive motor 43 and the variable diameter screw rod 40, which directly drives the movement of the screw rod slider 41 and the variable diameter slider 42.

[0040] In an embodiment, the driving mechanism can be selected from a multi-degree-of-freedom manipulator.

[0041] In an embodiment, the driving mechanism comprises a lifting movement mechanism 3, a linear movement mechanism 4 and a swing mechanism 5 connected in sequence, and a sand belt polishing mechanism is arranged on the swing mechanism 5, wherein the lifting movement mechanism 3 provides lifting function, the linear movement mechanism 4 provides linear movement along the axis of the pipeline, and the swing mechanism 5 is used for changing the horizontal inclination angle of the sand belt polishing mechanism.

[0042] The lifting movement mechanism 3 comprises a support 16, a lifting driving motor 18, a lifting screw 15 and a platform support plate 14. The lifting screw 15 is vertically arranged on the support 16 and is in transmission connection with the lifting driving motor 18. A transmission seat is threadedly connected to the lifting screw 15. The transmission seat is connected with the platform support plate 14, or the platform support plate 14 is directly threadedly connected with the lifting screw 15. The lifting movement of the platform support plate 14 is controlled by using the screw transmission principle. In actual design, a reversing device 17 can be arranged at the output end of the lifting driving motor 18. The output end of the reversing device 17 is perpendicular to the output end of the driving motor. The reversing device 17 has two output ends. A reversing device is further arranged at the two output ends of the reversing device 17. The reversing device also has two output ends which are perpendicular to the output end of the previous reversing device 17. The two output ends of the further arranged reversing device are in transmission with the lifting screws respectively. Thus, the lifting movement mechanism 3 has four lifting screws 15. The four lifting screws 15 can be arranged at the four corners of the support 16 to stably support the platform support plate 14.

[0043] A plurality of lifting movement mechanisms 3 can be arranged at the bottom of the platform support plate 14. The plurality of lifting movement mechanisms 3 share one support 16. However, the four lifting screws 15 in each lifting movement mechanism 3 are still arranged in a rectangular shape.

[0044] A linear telescopic cylinder can be used to replace the screw transmission to control the lifting of the platform support plate 14.

[0045] The linear movement mechanism 4 comprises a linear driving motor 23, a speed reducer 22, a transmission belt, a belt pulley 21, a linear guide rail 19 and a sliding base 20. The linear driving motor 23 drives the belt pulley 21 to rotate through the speed reducer 22 and the transmission belt. Two belt pulleys 21 are arranged on the platform support plate 14. Synchronous belts are sleeved on the two belt pulleys 21 to convert the output of the linear driving motor 23 into the movement of the synchronous belts. The linear guide rail 19 is arranged on the platform support plate 14. The sliding base 20 is slidably arranged on the linear guide rail 19 through a sliding block connected thereto. The sliding base 20 is connected with the synchronous belts. When the synchronous belts move, the sliding base 20 is driven to slide on the linear guide rail 19 to realize the output of linear movement. The linear driving motor 23 needs to be connected with the platform support plate 14 to be lifted synchronously to ensure the transmission between the linear driving motor 23 and the belt pulley 21.

[0046] A linear telescopic cylinder can be used to replace the belt transmission to control the linear movement of the sliding base 20.

[0047] The swing mechanism 5 comprises a swing base 28 and a swing driving motor 34 arranged on the sliding base 20, the swing base 28 is provided with a central shaft arranged on the sliding base 20 through a swing bearing seat 33, the swing driving motor 34 is in transmission connection with the central shaft, the swing driving motor 34 drives the central shaft to rotate, and then the swing base 28 swings around the axis of the central shaft, the driving wheel 31 and the grinding wheel 25 are arranged on the swing base 28, at this time, the position control of the sand belt polishing mechanism can be completed by cooperating with the lifting movement mechanism 3 and the linear movement mechanism 4, so that the sand belt polishing mechanism can match the pipeline to be polished.

[0048] In order to improve the polishing effect, the swing base 28 is further provided with a tension cylinder 29, a tension wheel 30 and at least one auxiliary wheel, the tension cylinder 29 is connected with the tension wheel 30, the tension wheel 30 is abutted on the inner circumferential wall of the sand belt by the extension and retraction of the tension cylinder 29, so as to realize the tensioning of the sand belt and avoid the problem of poor polishing effect caused by the loose sand belt, the auxiliary wheel is provided with two in the embodiment, which are a first auxiliary wheel 26 and a second auxiliary wheel 27, the first auxiliary wheel 26 and the second auxiliary wheel 27 are arranged on the inner side of the sand belt and are rotatably arranged on the swing base 28, so as to improve the transmission stability of the sand belt.

[0049] The front end of the swing base 28 is provided with a support mechanism mounting plate 45 for mounting the pipeline support mechanism 24.

[0050] In an embodiment, the polishing conveyor belt 2 comprises a plurality of transmission roller groups arranged along the axis of the pipeline to be polished, each transmission roller group comprises two transmission rollers, the axis of the transmission roller is parallel to the axis of the pipeline to be polished, at least one transmission roller is connected with the transmission motor and drives the pipeline to be polished to rotate by friction, when the two transmission rollers are connected with the transmission motor, the two transmission rollers have the same rotation direction.

[0051] The pipe inner circle abrasive belt polishing device further comprises a clamping mechanism 1, the clamping mechanism 1 comprising a clamping base 10, a clamping lifting seat 9, a rotating motor 8, a rotating base 7, a cylinder supporting arm 6, a clamping cylinder 11 and a clamping wheel 13, the clamping lifting seat 9 being movably arranged on the clamping base 10, and the specific arrangement mode of the upward and downward movement being that the clamping lifting seat 9 is freely slid in the sliding groove of the clamping base 10, and a clamping bolt is threadedly connected to the clamping base 10, the clamping bolt being extended into the sliding groove to abut against the clamping lifting seat 9 by screwing, so that the position of the clamping lifting seat 9 is locked, or the clamping lifting seat 9 is directly driven by a linear telescopic cylinder to move on the clamping base 10; the rotating motor 8 is arranged on the clamping lifting seat 9, the cylinder supporting arm 6 is connected with the rotating motor 8 through the rotating base 7, the clamping cylinder 11 is arranged at the end of the cylinder supporting arm 6 away from the rotating base 7, the clamping cylinder 11 is vertically telescopic, and the telescopic end of the clamping cylinder 11 is rotatably connected with the clamping wheel 13 through a clamping mounting seat 12, the clamping wheel 13 is driven by the clamping cylinder 11 to abut against the top of the pipe to be polished, and the transmission roller is used to limit the pipe to be polished, so that the pipe to be polished does not radially displace in the polishing process, and before clamping, the clamping cylinder 11 is rotated to the side of the pipe to be polished by the rotating motor 8, the horizontal height of the clamping cylinder 11 is adjusted by the clamping lifting seat 9 (the clamping wheel 13 needs to be higher than the top of the pipe to be polished, and a certain adjustment range is left), the clamping cylinder 11 is rotated to the top of the pipe to be polished, and finally the clamping wheel 13 abuts against the pipe to be polished, so that the position of the clamping wheel 13 is adjusted on one side to adapt to the pipe to be polished with different diameters.

[0052] In actual use, first, the height of the clamping wheel 13 is adjusted according to the outer diameter of the pipe to be polished, the pipe to be polished is conveyed to the polishing conveying belt 2, the rotating motor 8 is started to control the clamping wheel 13 to rotate to the top of the pipe to be polished, then the clamping cylinder 11 is controlled to extend to press the pipe to be polished by the clamping wheel 13, and then the polishing conveying belt 2 is started to drive the pipe to be polished to rotate.

[0053] Then the lifting drive motor 18 is started, the lifting drive motor 18 power is transmitted to the lifting screw 15 through the commutator 17, the lifting screw 15 drives the platform support plate 14 to lift to the specified height. After that, the swing drive motor 34 is started to adjust the angle of the sand belt polishing mechanism, and the linear drive motor 23 is started to control the sand belt polishing mechanism to slide on the linear guide rail 19, when the sand belt polishing mechanism extends to the inside of the pipeline to be polished, the variable diameter drive motor 37 and the screw drive motor 43 in the pipeline support mechanism 24 are started, the variable diameter drive motor 37 transmits power through gear engagement, drives the driven gear 36 to rotate, thereby driving the support arm 35 to move in the limiting groove of the limiting plate 39, expanding outward to support the pipe wall, the screw drive motor 43 drives the variable diameter screw 40 through the synchronous belt, drives the screw block 41 to move, and drives the center of the pipeline support mechanism 24 to be basically centered with the center of the pipeline to be polished, so that the pipeline support mechanism 24 realizes the support of the pipe wall. Then the tension cylinder 29 is started to tension the sand belt, the polishing drive motor 32 is started and cooperates with the linear motion mechanism 4 to drive the sand belt to polish the inner wall of the pipeline to be polished.

[0054] After the polishing operation is completed, the platform support plate 14 is lifted to separate the sand belt from the inner wall of the pipeline, the pipeline support mechanism 24 returns to the zero position, then the linear drive motor 23 drives the entire sand belt polishing mechanism to exit the inner wall of the pipeline, the polishing drive motor 32 is turned off, the tension cylinder 29 is adjusted to release the sand belt, and the machine stops running.

[0055] The adaptive changes according to actual needs are within the protection scope of the present application.

[0056] It should be noted that for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0057] In the present application, specific examples are applied to illustrate the principles and implementation modes of the present application, and the above embodiment descriptions are only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the present description should not be understood as a limitation of the present application.

Claims

1. An in-pipe circular sanding device, characterized by, The polishing conveying belt, the sand belt polishing mechanism and the driving mechanism are used for rotating the pipeline, the sand belt polishing mechanism comprises a sand belt, a pressure grinding wheel and a driving wheel for driving the sand belt to rotate, the sand belt is sleeved on the pressure grinding wheel and the driving wheel, and the driving mechanism drives the pressure grinding wheel to enter and exit the pipeline to be polished. The driving mechanism comprises a lifting movement mechanism, a linear movement mechanism and a swing mechanism which are connected in sequence, and the sand belt polishing mechanism is arranged on the swing mechanism. The lifting movement mechanism comprises a support, a lifting driving motor, a lifting screw rod and a platform support plate, the lifting screw rod is rotationally arranged on the support, the lifting screw rod is in transmission connection with the lifting driving motor, a transmission seat is threadedly connected to the lifting screw rod, and the transmission seat is connected with the platform support plate. The linear movement mechanism comprises a linear driving motor, a speed reducer, a transmission belt, a pulley, a linear guide rail and a sliding base, the linear driving motor drives the pulley to rotate through the speed reducer and the transmission belt, two pulleys are arranged on the platform support plate, a synchronous belt is arranged on the two pulleys, the platform support plate is provided with the linear guide rail, the sliding base is slidingly arranged on the linear guide rail, and the sliding base is connected with the synchronous belt. The swing mechanism comprises a swing base and a swing driving motor, the swing driving motor is arranged on the sliding base, a central shaft is arranged at the bottom of the swing base, the central shaft is rotationally arranged on the sliding base through a swing bearing seat, the swing driving motor is in transmission connection with the central shaft, and the swing base is provided with the driving wheel and the pressure grinding wheel. The polishing conveying belt comprises a plurality of transmission roller groups arranged along the axial direction of the pipeline to be polished, each transmission roller group comprises two transmission rollers, the axes of the transmission rollers are parallel to the axis of the pipeline to be polished, at least one of the transmission rollers is connected with a transmission motor, and the transmission motor drives the pipeline to be polished to rotate.

2. The in-pipe orbital sanding device of claim 1, wherein, The front end of the pressure grinding wheel is provided with a pipeline supporting mechanism, the pipeline supporting mechanism comprises a limiting plate, a plurality of supporting arms, a driven gear, a driving gear and a variable-diameter driving motor, the limiting plate is arranged at the front end of the pressure grinding wheel, a plurality of limiting grooves are arranged on the limiting plate in a diverging manner, the supporting arms are slidingly arranged in the limiting grooves, the driven gear is rotationally arranged at the front end of the limiting plate, arc-shaped holes are arranged on the driven gear at positions corresponding to the supporting arms, limiting rods are arranged on the supporting arms, the limiting rods pass through the arc-shaped holes, and the variable-diameter driving motor drives the driven gear to rotate through the driving gear.

3. The in-pipe orbital sanding device of claim 2, wherein, The front end of the pressure grinding wheel is provided with a variable-diameter screw rod transmission mechanism, the variable-diameter screw rod transmission mechanism comprises a screw rod driving motor, a variable-diameter screw rod and a screw rod sliding block, the screw rod driving motor is in transmission connection with the variable-diameter screw rod, the screw rod sliding block is threadedly connected to the variable-diameter screw rod, sliding guide rails are arranged on the two sides of the screw rod sliding block, variable-diameter sliding blocks are slidingly connected to the sliding guide rails, the limiting plate is connected with the variable-diameter sliding blocks and / or the screw rod sliding block, and the variable-diameter driving motor is connected with the variable-diameter sliding blocks.

4. The in-draught abrasive belt sander according to claim 1, characterized in that, The swing base is further provided with a tensioning cylinder, a tensioning wheel and at least one auxiliary wheel for improving the driving stability of the abrasive belt, the tensioning cylinder is connected with the tensioning wheel, and the tensioning wheel abuts against the inner circumferential wall of the abrasive belt.

5. The in-draught abrasive belt sander according to claim 1, characterized in that, The pipe inner circle abrasive belt polishing device further comprises a clamping mechanism, the clamping mechanism comprises a clamping base, a clamping lifting seat, a rotating motor, a rotating base, a cylinder supporting arm, a clamping cylinder and a clamping wheel, the clamping lifting seat is movably arranged on the clamping base, the rotating motor is arranged on the clamping lifting seat, the cylinder supporting arm is connected with the rotating motor through the rotating base, one end of the cylinder supporting arm away from the rotating base is provided with the clamping cylinder, the clamping cylinder is vertically telescopic, and the telescopic end of the clamping cylinder is rotationally connected with the clamping wheel through a clamping mounting seat.

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