Precise polishing device for inner fillets of pipelines

Abstract

The invention discloses a pipeline inner fillet precision polishing device which comprises a base, a sliding table, a driving mechanism, a locking support and a polishing mechanism, the sliding table is installed on the base in a linear moving mode, the driving mechanism is in driving connection with the sliding table, and the locking support is used for locking a to-be-polished pipeline on the sliding table; the polishing mechanism comprises a first support, a plurality of flexible pulleys mounted on the first support, a plurality of flexible supporting seats sequentially mounted on the first support at intervals in the circumferential direction of the first support, a plurality of clamping seats mounted on the flexible supporting seats correspondingly, and a plurality of polishing machines mounted on the clamping seats correspondingly. The multiple flexible pulleys are connected with the circumferential side of the inner wall of the to-be-polished pipeline, and the polishing grinding heads of the multiple polishing machines abut against the multiple inner fillets of the to-be-polished pipeline through the flexible function of the multiple flexible supporting bases, so that the problems that the inner fillets of the vacuum square pipeline are difficult to polish, and the roughness is poor are solved; and vacuum square pipelines of different specifications can be matched, and the manual operation difficulty is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline polishing, and in particular to a precision polishing device for the inner fillet of a pipeline. Background Art

[0002] Vacuum pipeline transportation is a form of transportation without air resistance and friction, which requires precise post-processing of the roughness of the inner wall of the vacuum pipeline.

[0003] If the traditional manual polishing method is used, it is extremely difficult to polish the four fillets of the vacuum square pipe cavity, and manual work is often required with the help of tools. When polishing the fillets of the narrow and long square pipe cavity, the difficulty of polishing will be further increased. Even if an extended polishing tool is used, it is difficult to achieve the required roughness requirements. Summary of the invention

[0004] In order to solve the above problems, the present application provides a device for precision polishing of the inner fillet of a pipe.

[0005] The present application provides a device for precisely polishing the inner fillet of a pipeline, comprising a base, a slide, a driving mechanism, a locking bracket and a polishing mechanism. The slide can be installed on the base in a linearly movable manner, the driving mechanism is connected to the slide driving mechanism, the driving mechanism is used to drive the slide to move in a linear direction, the locking bracket is connected to the slide, the locking bracket is used to lock the pipeline to be polished on the slide, the polishing mechanism comprises a first bracket, a plurality of flexible pulleys installed on the first bracket, a plurality of flexible support seats installed on the first bracket in sequence along the circumferential direction of the first bracket, a plurality of clamping seats respectively installed on the plurality of flexible support seats and a plurality of polishing machines respectively installed on the plurality of clamping seats, the first bracket is installed on the base, the plurality of flexible pulleys are used to respectively connect with the circumferential sides of the inner wall of the pipeline to be polished, so that the first bracket is maintained at the central axis of the pipeline to be polished, and the flexibility of the plurality of flexible support seats is used to make the polishing grinding heads of the plurality of polishing machines press against the plurality of inner fillets of the pipeline to be polished.

[0006] In some embodiments, the pipe inner fillet precision polishing device also includes a connecting mechanism, which includes a second bracket and a support rod, the second bracket is installed on the base, the support rod is connected to the second bracket, and the support rod is connected to the first bracket so that the first bracket is installed on the base.

[0007] In some embodiments, the connecting mechanism also includes a third bracket and a clamping seat, the third bracket is installed on the base, the third bracket supports the support rod, the clamping seat is connected to the third bracket, and the clamping seat is used to clamp the support rod onto the third bracket.

[0008] In some embodiments, the drive mechanism comprises:

[0009] A motor is mounted on the base;

[0010] A lead screw connected to a motor drive;

[0011] A screw seat is installed on the base, and the screw is rotatably installed on the screw seat;

[0012] A lead screw nut, threadably connected to the lead screw; and

[0013] The nut seat is fixedly connected to the screw nut, and the top end of the nut seat is connected to the slide.

[0014] In some embodiments, the base comprises:

[0015] Base bracket;

[0016] Two linear slide rails are arranged in parallel, the two linear slide rails are installed on the base bracket, and the slide table is slidably installed on the two linear slide rails.

[0017] In some embodiments, the base support is formed by connecting two section supports.

[0018] In some embodiments, the flexible pulley comprises:

[0019] A mounting seat connected to the first bracket;

[0020] A telescopic member, built into the mounting base;

[0021] A wheel seat connected to the telescopic member;

[0022] The pulley is rotatably mounted on the wheel seat, and under the elastic force of the telescopic member, the pulley is in close contact with the inner wall of the pipe to be polished.

[0023] In some embodiments, the flexible support comprises:

[0024] The first seat body is fixedly connected to the first bracket, and the first seat body is provided with a cylinder portion located at two opposite sides, one axial end of the cylinder portion is open and the other axial end is provided with a through opening, and the diameter of the through opening is smaller than the inner diameter of the cylinder portion;

[0025] A second seat body is connected to the clamping seat, and the second seat body is provided with step rods located on two opposite sides, the step rods are passed through the cylinder, and the step rods are passed through the through opening;

[0026] A screw and a gasket, wherein the screw is connected to the step rod, the gasket is sleeved on the screw, the gasket is located on the side where the through-hole of the barrel is located, the inner diameter of the gasket is smaller than the diameter of the through-hole and the outer diameter is larger than the diameter of the through-hole;

[0027] The elastic member is installed between the cylinder and the step rod.

[0028] In some embodiments, the pipe inner fillet precision polishing device further includes a dust removal mechanism, and the dust removal mechanism includes:

[0029] A plurality of universal bamboo tubes corresponding to the plurality of polishing machines respectively, and the tube openings of the universal bamboo tubes face the polishing grinding heads; and

[0030] The air pipe is connected with a plurality of universal bamboo tubes, and the air pipe is used to connect to an air source.

[0031] In some embodiments, the pipe to be polished is a vacuum square pipe, and the polishing mechanism is provided with 4 flexible support seats, 4 clamping seats and 4 polishing machines, and the polishing grinding heads of the 4 polishing machines are used to polish the 4 inner fillets of the vacuum square pipe.

[0032] The beneficial effects of the present application are as follows: a device for precision polishing of the inner fillet of a pipeline is provided, comprising a base, a slide, a driving mechanism, a locking bracket and a polishing mechanism. The base is the basic platform of the device, the slide and the polishing mechanism are both installed on the base, the slide can be installed on the base in a linearly movable manner, the pipeline to be polished is locked on the slide through the locking bracket, and the pipeline to be polished is driven by the slide to make a linear reciprocating motion, the polishing mechanism comprises a first bracket, a plurality of flexible pulleys, a plurality of flexible support seats, a plurality of clamping seats and a plurality of polishing machines, the first bracket is installed on the base, and the plurality of flexible pulleys are installed on the first bracket. When the slide drives the pipeline to be polished to move until the first bracket extends into the lumen of the pipeline to be polished, the plurality of flexible pulleys are respectively connected to the inner wall circumference of the pipeline to be polished, and the flexible function of the flexible pulley enables the flexible pulley to be retractable, so that the first bracket can be kept at the central axis of the pipeline to be polished, and the plurality of flexible support seats are installed in the first bracket in sequence along the circumference of the first bracket. A bracket, multiple clamping seats are respectively installed on multiple flexible support seats, and multiple polishing machines are respectively installed on multiple clamping seats. The flexible function of the flexible support seat enables it to adjust the distance between the polishing machine and the first bracket. Since all the inner fillets of the pipe to be polished need to be polished and ground, the polishing grinding heads of the multiple polishing machines are pressed against the multiple inner fillets of the pipe to be polished through the flexible function of the multiple flexible support seats. As the slide drives the pipe to be polished to make a linear reciprocating motion, the polishing and grinding of all the inner fillets of the pipe to be polished is achieved through the polishing grinding heads, and due to the multiple flexible functions, the polishing effect can be guaranteed, which solves the current problems of difficult polishing and poor roughness of the inner fillets of national standard vacuum square pipes, improves the polishing quality of the inner fillets, so that the pipes after polishing the inner fillets meet the roughness requirements, can match vacuum square pipes of different specifications, reduce the difficulty of manual work, greatly improve work efficiency, and have the advantages of saving time and labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0034] Figure 1A first structural schematic diagram of a pipe inner fillet precision polishing device provided in the present application;

[0035] Figure 2 A second structural schematic diagram of a pipe inner fillet precision polishing device provided in the present application;

[0036] Figure 3 A schematic diagram of the partial structure of a pipe inner fillet precision polishing device provided in this application;

[0037] Figure 4 A schematic diagram of the relative positions of a polishing mechanism of a pipe inner fillet precision polishing device provided in the present application and a pipe to be polished;

[0038] Figure 5 A schematic diagram of the specific structure of a polishing mechanism of a pipe inner fillet precision polishing device provided in this application;

[0039] Figure 6 A schematic diagram of the specific structure of a flexible support seat of a polishing mechanism of a pipe inner fillet precision polishing device provided in the present application.

[0040] Description of the drawings: 1-base, 2-slide, 3-linear slide, 4-locking bracket, 5-second bracket, 6-third bracket, 7-pressing seat, 8-support rod, 9-motor, 10-screw, 11-screw nut, 12-first bracket, 13-flexible pulley, 14-polishing machine, 141-polishing grinding head, 15-clamping seat, 16-flexible support seat, 161-first seat body, 1611-cylinder, 162-second seat body, 1621-step rod, 163-screw, 164-gasket, 165-elastic part, 17-universal bamboo tube, 18-trachea, 19-nut seat, 20-screw seat, 21-reducer, 22-coupling, 23-pipe to be polished. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0043] Please refer to Figure 1 The present application provides a device for precisely polishing the inner fillet of a pipe, which comprises a base 1, a slide 2, a driving mechanism, a locking bracket 4 and a polishing mechanism.

[0044] The base 1 is the basic platform of the device, the slide 2 and the polishing mechanism are both installed on the base 1, the slide 2 can be installed on the base 1 for linear movement, the locking bracket 4 is connected to the slide 2, the pipe 23 to be polished is placed on the slide 2, the pipe 23 to be polished is locked on the slide 2 by the locking bracket 4, the slide 2 drives the pipe 23 to be polished to make linear reciprocating motion, the driving mechanism is connected to the slide 2, and the driving mechanism provides driving force for the slide 2 to move linearly.

[0045] Please refer to Figures 3 to 5 The polishing mechanism includes a first bracket 12, a plurality of flexible pulleys 13, a plurality of flexible support seats 16, a plurality of clamping seats 15 and a plurality of polishers 14. In some embodiments, the polisher 14 is a pneumatic polisher 14. The number of the flexible pulleys 13, the flexible support seats 16, the clamping seats 15 and the polishers 14 needs to be selected according to the cross-sectional shape of the pipe 23 to be polished. When the pipe 23 to be polished is a vacuum square pipe, there are 4 inner fillets on the inner wall of the vacuum square pipe. The number of the flexible support seats 16, the clamping seats 15 and the polishers 14 are all 4, and the number of the flexible pulleys 13 is at least 4. Figure 4 FIG. 4 shows a total of eight flexible pulleys 13 , with two flexible pulleys 13 being arranged on each side of the first bracket 12 .

[0046] The first bracket 12 is mounted on the base 1, thereby realizing the setting that the polishing mechanism is mounted on the base 1. Figure 4 and Figure 5 , multiple flexible pulleys 13 are installed on the first bracket 12. When the slide 2 drives the pipe 23 to be polished to move to the first bracket 12 and extend into the lumen of the pipe 23 to be polished, the multiple flexible pulleys 13 are respectively connected to the inner wall circumference of the pipe 23 to be polished. The flexible function of the flexible pulley 13 enables the flexible pulley 13 to be retracted and retracted, so that the first bracket 12 can be kept at the central axis of the pipe 23 to be polished. It is mainly aimed at keeping the first bracket 12 at the central axis of the pipe 23 to be polished during the inner fillet polishing process, which can improve the final polishing effect.

[0047] A plurality of flexible support seats 16 are installed on the first bracket 12 at intervals along the circumference of the first bracket 12. The installation positions of the plurality of flexible support seats 16 need to refer to the cross-sectional shape of the pipe 23 to be polished. When the pipe 23 to be polished is a vacuum square pipe, the four flexible support seats 16 correspond to the four inner fillets of the vacuum square pipe. A plurality of clamping seats 15 are installed on the plurality of flexible support seats 16, respectively, and a plurality of polishing machines 14 are installed on the plurality of clamping seats 15, respectively. The clamping seats 15 have a clamping function and can stably clamp the polishing machine 14, making it convenient for the polishing machine 14 to be disassembled and assembled. A plurality of polishing machines 14 are installed on the plurality of clamping seats 15, respectively. The present solution is to polish and grind the inner fillet area of ​​the pipe 23 to be polished by the polishing grinding head 141 of the polishing machine 14.

[0048] The flexible support seat 16 has a flexible function. Under the action of the flexible function of the flexible support seat 16, the distance between the polishing machine 14 and the first bracket 12 can be adaptively adjusted. Through the flexible functions of multiple flexible support seats 16, the polishing grinding heads 141 of multiple polishing machines 14 are pressed against multiple inner fillets of the pipe 23 to be polished, so that the polishing amplitude is consistent, and there is no need to manually adjust the polishing process of each inner fillet. As the slide 2 drives the pipe 23 to be polished to make a linear reciprocating motion, the polishing and grinding of all the inner fillets of the pipe 23 to be polished is achieved through the polishing grinding head 141, and the polishing effect can be guaranteed due to the multiple flexible functions.

[0049] The pipe inner corner precision polishing device provided in the present application solves the current problems of difficulty in polishing the inner corners of national standard vacuum square pipes and poor roughness, improves the quality of inner corner polishing, makes the pipes after inner corner polishing meet the roughness requirements, can match vacuum square pipes of different specifications, reduces the difficulty of manual work, greatly improves work efficiency, and has the advantages of saving time and labor.

[0050] It should be noted that the pipe inner corner precision polishing device provided in the present application is not only suitable for the inner corner polishing operation of vacuum square pipes, but also suitable for the inner corner polishing operation of other types of pipes.

[0051] There are many ways to implement the flexible function of the flexible pulley 13. This application provides a specific implementation scheme that can be combined with Figure 5 In some embodiments, the flexible pulley 13 includes a mounting seat, a telescopic member, a wheel seat and a pulley, the mounting seat is connected to the first bracket 12, the telescopic member is installed inside the mounting seat, the telescopic member has a telescopic function, the wheel seat is connected to the telescopic member, the telescopic member can be used to move the wheel seat relative to the mounting seat, the pulley can be rotatably installed on the wheel seat, and the spatial position of the pulley can be adaptively adjusted under the elastic force of the telescopic member, so that the pulley is in close contact with the inner wall of the pipe 23 to be polished.

[0052] Please refer to Figure 5The polishing machine 14 has a small tilt angle and is fixed on the clamping seat 15 by a top screw. Figure 5 The angle between the central axis of the polisher 1414 and the central axis of the pipe 23 to be polished is 5°. If the polisher 14 is cut at the plane where the diagonal line of the first bracket 12 is located, the angle between the central axis of the polisher 1414 and the central axis of the pipe 23 to be polished in this cross-sectional shape is 7°. In other embodiments, the tilt angle of the polisher 14 can be adaptively adjusted.

[0053] Regarding the flexible function of the flexible support seat 16, it is necessary to realize the function of pressing the polishing grinding head 141 against the inner fillet position of the pipe 23 to be polished. In some embodiments, please refer to Figure 4 and Figure 6 The flexible support seat 16 includes a first seat body 161, a second seat body 162, a screw 163, a gasket 164 and an elastic member 165. The first seat body 161 is fixedly connected to the first bracket 12. The first seat body 161 is provided with a cylinder 1611 located on two opposite sides. One axial end of the cylinder 1611 is open and the other axial end is provided with a through opening. The diameter of the through opening is smaller than the inner diameter of the cylinder 1611. The second seat body 162 is connected to the clamping seat 15. The second seat body 16 2 is provided with step rods 1621 located at opposite sides, the step rods 1621 are inserted into the barrel 1611, the step rods 1621 are inserted into the through-hole, the screws 163 are connected to the step rods 1621, the gaskets 164 are sleeved on the screws 163, the gaskets 164 are located at one side of the through-hole of the barrel 1611, the inner diameter of the gaskets 164 is smaller than the diameter of the through-hole and the outer diameter is larger than the diameter of the through-hole, and the elastic member 165 is installed between the barrel 1611 and the step rods 1621. The elastic member 165 is generally in the form of a spring, and when the first bracket 12 extends into the lumen of the pipe 23 to be polished, the force transmission direction between the first bracket 12 and the pipe 23 to be polished is the first bracket 12, the first seat body 161, the elastic member 165, the second seat body 162, the clamping seat 15 and the polishing machine 14 in sequence, which can realize the function of pressing the polishing grinding head 141 against the inner fillet position of the pipe 23 to be polished.

[0054] In some embodiments, see Figure 3 The pipe inner fillet precision polishing device also includes a connecting mechanism, which includes a second bracket 5 and a support rod 8. The second bracket 5 is installed on the base 1, and the support rod 8 is connected to the second bracket 5. The support rod 8 is connected to the first bracket 12, thereby realizing the setting that the first bracket 12 is installed on the base 1. A positioning pin can be installed between the second bracket 5 and the support rod 8, and the positioning pin plays a role in positioning and preventing deviation.

[0055] In some embodiments, see Figure 3The connecting mechanism also includes a third bracket 6 and a clamping seat 7. The third bracket 6 is installed on the base 1. The third bracket 6 supports the support rod 8. The clamping seat 7 is connected to the third bracket 6. The clamping seat 7 is used to press the support rod 8 on the third bracket 6. The position stability of the support rod 8 is improved by the third bracket 6 and the clamping seat 7.

[0056] The driving mechanism provides the slide 2 with a driving force for linear movement. In some embodiments, please refer to Figure 3 The driving mechanism adopts the transmission mode of the screw nut 11, specifically including the motor 9, the screw 10, the screw seat 20, the screw nut 11 and the nut seat 19. The motor 9 is installed on the base 1, the screw 10 is connected to the motor 9 by driving, the screw seat 20 is installed on the base 1, the screw 10 is rotatably installed on the screw seat 20, the screw nut 11 is threadedly connected to the screw 10, the nut seat 19 is fixedly connected to the screw nut 11, and the top of the nut seat 19 is connected to the slide 2. When the motor 9 drives the screw 10 to rotate, the screw nut 11 moves linearly along the axial direction of the screw 10, and the slide 2, the nut seat 19 and the screw nut 11 are connected in sequence, so that the slide 2 moves linearly. A reducer 21 can also be added between the motor 9 and the screw 10, the motor 9 is connected to the reducer 21, and the reducer 21 is connected to the screw through the coupling 22, and the speed is reasonably controlled by the reducer 21.

[0057] In some embodiments, see Figure 1 and Figure 2 The base 1 includes a base bracket and a linear slide rail 3 installed on the base bracket. Two linear slide rails 3 are provided in parallel, and the slide table 2 is slidably installed on the two linear slide rails 3.

[0058] When designing the scheme, the inventor chose a scheme in which the support rod 8 is no longer than 3 meters, which improves the problem that when the support rod 8 is too long, the polishing mechanism installed at one end of the support rod 8 will sink, which is not conducive to keeping the first bracket 12 at the central axis of the pipe 23 to be polished.

[0059] The vacuum square pipe is generally up to 6 meters long. In some embodiments, please refer to Figure 1 and Figure 2 The base bracket is formed by connecting two sub-brackets. Compared with the solution that the base bracket is composed of a complete bracket, the sub-bracket form can reduce the manufacturing difficulty and ensure the processing accuracy. The two sub-brackets are connected by fastening screws, and positioning pins can also be installed for positioning and anti-deflection.

[0060] In some embodiments, the pipe inner fillet precision polishing device also includes a dust removal mechanism, please refer to Figures 3 to 5The dust removal mechanism includes multiple universal bamboo tubes 17 and air pipes 18. The air pipes 18 are connected to the multiple universal bamboo tubes 17. The air pipes 18 are used to connect to the air source. The multiple universal bamboo tubes 17 correspond to the multiple polishing machines 14. The pipe mouth of the universal bamboo tube 17 faces the polishing grinding head 141 to remove the debris generated during the polishing process.

[0061] In some embodiments, a groove is provided on the slide 2, and the groove is the installation position of the polished pipe.

[0062] The present application also provides an implementation method of the above-mentioned pipe inner corner precision polishing device: in the initial stage, the locking bracket 4 is in a disassembled state, the slide 2 stays at the farthest end of the base bracket, the vacuum square pipe is lifted to the top of the slide 2 by an external lifting machinery, and the vacuum square pipe is slowly dropped vertically to the fixed groove position on the slide 2, while the positioning block is used to limit the vacuum square pipe in the length direction, and then the locking bracket 4 is locked and fixed in turn; then, the start button of the motor 9 is pressed, the vacuum square pipe is brought close to the polishing mechanism, the polishing mechanism is lightly pressed, and the polishing grinding heads 141 of the polishing machines 14 at 4 locations are extended into the pipe. At this time, the flexible bracket 4 The support seat 16 will adapt its telescopic length according to the actual size of the inner cavity of the pipeline, and press the polishing grinding head 141 against the four inner fillets of the inner cavity of the pipeline, and adjust the universal bamboo tube 17 to align with the four inner fillets; when the equipment is working, turn on the pneumatic polisher 14 to drive the polishing head to rotate, start the motor 9 to drive the slide 2 to move slowly back and forth, and turn on the dust removal mechanism to blow away the debris. After polishing is completed, exit the polishing mechanism, check whether the roughness of the four inner fillets of the inner cavity of the vacuum square pipeline is qualified, and then use an external lifting machinery to lift the vacuum square pipeline away from the equipment; after the vacuum square pipeline is lifted off the equipment, turn around in an open space, and repeat the above operation to polish the other half of the inner cavity of the pipeline.

[0063] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0064] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A precision polishing device for inner fillet of a pipeline, characterized in that: include: Pedestal; A slide table is linearly movable and mounted on the base; A driving mechanism, drivingly connected to the slide, the driving mechanism is used to drive the slide to move in a straight line; A locking bracket connected to the slide, the locking bracket being used to lock the pipe to be polished on the slide; as well as The polishing mechanism includes a first bracket, a plurality of flexible pulleys installed on the first bracket, a plurality of flexible support seats installed on the first bracket at intervals along the circumference of the first bracket, a plurality of clamping seats respectively installed on the plurality of flexible support seats, and a plurality of polishing machines respectively installed on the plurality of clamping seats. The first bracket is installed on the base, the plurality of flexible pulleys are used to be respectively connected to the inner wall circumference of the pipe to be polished so that the first bracket is maintained at the central axis of the pipe to be polished, and the flexibility of the plurality of flexible support seats is used to make the polishing grinding heads of the plurality of polishing machines press against the plurality of inner fillets of the pipe to be polished.

2. The device for precision polishing of inner fillet of a pipe according to claim 1, characterized in that: The pipeline inner fillet precision polishing device also includes a connecting mechanism, and the connecting mechanism includes: A second bracket is mounted on the base; A support rod is connected to the second bracket, and the support rod is connected to the first bracket so that the first bracket is installed on the base.

3. The pipe inner fillet precision polishing device according to claim 2, characterized in that: The connecting mechanism also includes: A third bracket is installed on the base, and the third bracket supports the support rod; A pressing seat is connected to the third bracket, and the pressing seat is used to press the support rod onto the third bracket.

4. The pipe inner fillet precision polishing device according to claim 1, characterized in that: The driving mechanism comprises: A motor, mounted on the base; A screw rod, drivingly connected to the motor; A screw seat is mounted on the base, and the screw is rotatably mounted on the screw seat; A screw nut, threadedly connected to the screw; and A nut seat is fixedly connected to the screw nut, and the top end of the nut seat is connected to the slide.

5. The pipe inner fillet precision polishing device according to claim 1, characterized in that: The base comprises: Base bracket; Two linear slide rails are provided in parallel, the two linear slide rails are installed on the base bracket, and the slide table is slidably installed on the two linear slide rails.

6. The device for precisely polishing inner fillet of a pipe according to claim 5, characterized in that: The base support is formed by butting two section supports.

7. The pipe inner fillet precision polishing device according to claim 1, characterized in that: The flexible pulley comprises: A mounting base connected to the first bracket; A telescopic member, internally mounted in the mounting seat; A wheel seat connected to the telescopic member; The pulley is rotatably mounted on the wheel seat, and under the elastic force of the telescopic member, the pulley is in close contact with the inner wall of the pipe to be polished.

8. The pipe inner fillet precision polishing device according to claim 1, characterized in that: The flexible support seat comprises: A first seat body is fixedly connected to the first bracket, the first seat body is provided with a cylinder portion located at two opposite sides, one axial end of the cylinder portion is open and the other axial end is provided with a through opening, the diameter of the through opening is smaller than the inner diameter of the cylinder portion; A second seat body connected to the clamping seat, the second seat body is provided with step rods located on two opposite sides, the step rods are passed through the cylinder, and the step rods are passed through the through opening; A screw connected to the step rod; A gasket, sleeved on the screw, the gasket is located on the side of the through-hole of the barrel, the inner diameter of the gasket is smaller than the diameter of the through-hole and the outer diameter is larger than the diameter of the through-hole; An elastic member is installed between the cylinder and the step rod.

9. The pipe inner fillet precision polishing device according to any one of claims 1 to 8, characterized in that: The pipeline inner fillet precision polishing device also includes a dust removal mechanism, and the dust removal mechanism includes: A plurality of universal bamboo tubes, corresponding to the plurality of polishing machines respectively, wherein the tube openings of the universal bamboo tubes face the polishing grinding heads; and An air pipe is connected to the plurality of universal bamboo tubes, and the air pipe is used to connect to an air source.

10. The pipe inner fillet precision polishing device according to claim 9, characterized in that: The pipe to be polished is a vacuum square pipe, and the polishing mechanism is provided with 4 flexible support seats, 4 clamping seats and 4 polishing machines. The polishing grinding heads of the 4 polishing machines are used for polishing the 4 inner fillets of the vacuum square pipe.

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