An inner wall rapid grinding device for pipe processing

Abstract

The present invention provides a rapid inner wall grinding device for pipe processing, belonging to the technical field of pipe processing, including a processing pipe, a telescopic motor, and a traveling mechanism for the device to travel along the axis of the processing pipe inside the processing pipe and prevent the device from rotating synchronously with the grinding mechanism. The whole invention gradually grinds the inner side wall of the processing pipe at low speed and high speed respectively by changing the rotation speed of the driving motor. First, it grinds at low speed through the first grinding block, and at the same time softens the inner wall of the processing pipe with the grinding fluid passing through the first liquid spraying port to accelerate the preliminary grinding effect. Further, when the rotation speed of the driving motor becomes faster, the first grinding block shrinks, and it grinds at high speed through the second grinding block, and cooperates with the coolant and lubricating fluid of the second liquid spraying port to avoid the appearance of fish scale patterns. It can automatically perform hierarchical grinding on the processing pipe, effectively improving the grinding effect and speed of the inner side wall processing of the processing pipe.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline processing, and in particular to an inner wall rapid grinding device for pipeline processing. Background Art

[0002] When the pipeline is not long enough, multiple pipelines need to be welded together to meet different usage requirements. However, the welds on the inner wall of the pipeline usually have more burrs and poor flatness, which will affect the subsequent use of the pipeline. Therefore, the welds on the inner wall of the pipeline need to be polished.

[0003] The prior art publication number CN115070527A discloses a pipeline inner wall grinding device, comprising a cylinder; a group of rollers are evenly distributed on the circumference of the surface of the cylinder; the rollers protrude from the surface of the cylinder, and one of the rollers is driven by a motor; a connecting column is fixedly connected to the middle of the cylinder; a turntable is rotatably connected to the outer side of the connecting column, and the turntable is driven by a motor; a group of grinding blocks are evenly distributed on the circumference of the turntable surface; when targeting some pipelines with larger lengths and diameters, the cylinder can be placed inside the pipeline, and then the rollers are driven to rotate by the motor one, so that the cylinder moves inside the pipeline until it moves to the position of the pipeline weld, and then the turntable is driven to rotate by the motor two, and then the turntable drives multiple grinding blocks to rotate synchronously, so that the grinding blocks grind at the weld position of the inner wall of the pipeline, thereby removing burrs at the weld position, improving the flatness of the weld, and facilitating the subsequent use of the pipeline;

[0004] However, the existing technical solutions still have certain limitations. The existing technology adopts an overall grinding solution for the inner wall of the pipeline. Since there are many burrs at the beginning of grinding, it needs to be polished with a higher-mesh sanding belt after it becomes smooth after grinding for a period of time. Therefore, the overall grinding method adopted by the existing technical solution is not only slow, but also has a poor grinding effect. In specific operations, a low-mesh sanding belt needs to be used for grinding. After grinding, a high-mesh sanding belt is used for further grinding to ensure the flatness and smoothness of the inner wall of the pipeline after grinding. Therefore, it is very necessary to invent a device that can perform graded grinding on the inner wall of the pipeline.

[0005] How to invent a rapid inner wall grinding device for pipeline processing to improve these problems has become an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0006] In order to make up for the above shortcomings, the present invention provides a rapid inner wall grinding device for pipeline processing, aiming to improve the problems of slow overall grinding speed and poor grinding quality in the prior art solutions.

[0007] The present invention is achieved in that:

[0008] The present invention provides a rapid inner wall grinding device for pipe processing, including a processing pipe and a telescopic motor, and further including:

[0009] A traveling mechanism for the device to travel along the axis of the processing pipe inside the processing pipe and prevent the device from rotating synchronously with the grinding mechanism;

[0010] A feeding mechanism for continuously supplying liquid to the rotating grinding mechanism. Through two different hollow pipes, two different grinding liquids can be continuously supplied to the grinding mechanism while it is rotating at a high speed;

[0011] A grinding mechanism that can grind the inner side wall of the processing pipe. Different grinding effects are provided by changing the rotation speed of the driving motor. At low rotation speeds, the rough structure of the inner side wall of the processing pipe can be initially ground by the first grinding block, and at the same time, the first grinding liquid is sprayed out through the first liquid spraying port to accelerate the grinding effect. At high rotation speeds, the first grinding block retracts, and the inner side wall of the processing pipe is further ground by the second grinding block. At the same time, another grinding liquid is sprayed out through the second liquid spraying port to lubricate and cool the grinding area.

[0012] Preferably, one end of the traveling mechanism is fixedly connected to the output shaft of the telescopic motor. A driving motor is fixedly installed on the side of the traveling mechanism close to the grinding mechanism. A plurality of annularly arranged movable support rods are sleeved in the traveling mechanism in a limited manner. A first compression spring is fixedly installed between the end of the movable support rod close to the center of the traveling mechanism and the inside of the traveling mechanism. The end of the movable support rod extending outside the traveling mechanism is fixedly installed with a limiting rectangular frame. A plurality of traveling wheel sets are rotatably connected inside the limiting rectangular frame through bearings, and the axes of the traveling wheel sets are designed to be perpendicular to the distribution direction of the axis of the processing pipe.

[0013] Preferably, the feeding mechanism includes a first fixed pipe and a second fixed pipe. Fixed support frames are fixedly installed on the sides of the first fixed pipe and the second fixed pipe. The first fixed pipe and the second fixed pipe are fixedly connected to the traveling mechanism through the fixed support frames. The parts of the first fixed pipe and the second fixed pipe in contact with the grinding mechanism are rotatably connected through sealed bearings. A first annular flow groove is provided in the part of the grinding mechanism in contact with the first fixed pipe, and a second annular flow groove is provided in the part of the grinding mechanism in contact with the second fixed pipe. The interiors of the first fixed pipe and the second fixed pipe are both hollow. The second fixed pipe is sleeved outside the output shaft of the driving motor, and the first fixed pipe is sleeved outside the second fixed pipe. Two liquid storage cavities provided with pressure pumps are arranged inside the traveling mechanism. A first liquid delivery pipe is connected between the inside of the first fixed pipe and one of the liquid storage cavities, and a second liquid delivery pipe is connected between the inside of the second fixed pipe and the other liquid storage cavity.

[0014] Preferably, a groove communicating with the first annular flow groove is formed at the end of the first fixing pipe, and a circular groove communicating with the second annular flow groove is also formed at the end of the second fixing pipe.

[0015] Preferably, a limiting sliding groove is formed inside the grinding mechanism. A first grinding slider is limited and movably sleeved inside the limiting sliding groove. A second grinding slider is limited and movably sleeved inside the first grinding slider. A tension spring is fixedly installed between the first grinding slider and the limiting sliding groove. A third compression spring is fixedly installed between the second grinding slider and the first grinding slider. A first liquid supply pipe and a second liquid supply pipe are symmetrically formed inside the grinding mechanism relative to the second grinding slider. Two groups of first airtight grooves are symmetrically formed inside the grinding mechanism relative to the first grinding slider. A first pneumatic slider is limited and hermetically sleeved inside the first airtight groove. A second compression spring is fixedly installed between the first pneumatic slider and the inner side wall of the first airtight groove. A second airtight groove communicating with the first airtight groove is formed inside the grinding mechanism between the limiting sliding groove and the first airtight groove. A second pneumatic slider is hermetically and movably sleeved inside the second airtight groove.

[0016] Preferably, the second pneumatic slider is of a T-shaped design, and the smaller end of the second pneumatic slider penetrates through the limiting sliding groove and the first grinding slider to abut against the second grinding slider.

[0017] Preferably, the first liquid supply pipe communicates with the first annular flow groove, and the second liquid supply pipe communicates with the second annular flow groove.

[0018] Preferably, one end of the first grinding slider extending to the outside of the grinding mechanism is fixedly installed with a second grinding block. A first communication pipe is formed inside the second grinding slider. One end of the first communication pipe is close to the first liquid supply pipe. The other end of the first communication pipe extends to the outside of the grinding mechanism and is fixedly installed with a first liquid spraying port. A second communication pipe is also formed inside the second grinding slider. One end of the second communication pipe is close to the second liquid supply pipe. The other end of the second communication pipe extends to the outside of the grinding mechanism and is fixedly installed with a second liquid spraying port. One end of the second grinding slider located outside the grinding mechanism is fixedly installed with a first grinding block. The first grinding block penetrates through the gap of the second grinding block and is hermetically and movably sleeved with the second grinding block.

[0019] Preferably, the first pneumatic slider is designed with a counterweight, and the weight of the first pneumatic slider is greater than the masses of the second grinding slider and the first grinding slider.

[0020] Preferably, both the second grinding block and the first grinding block are of an inclined spiral design, and the grinding fineness of the second grinding block is greater than that of the first grinding block.

[0021] The beneficial effects of the present invention are:

[0022] The overall device changes the rotational speed of the driving motor and gradually polishes the inner wall of the processing pipeline at low speed and high speed respectively. First, it polishes at low speed through the first polishing block, and at the same time softens the inner wall of the processing pipeline with the grinding fluid passing through the first liquid spraying port to accelerate the preliminary polishing effect. Further, the first polishing block shrinks by increasing the rotational speed of the driving motor, and it polishes at high speed through the second polishing block, and cooperates with the coolant and lubricant of the second liquid spraying port to make the polished part of the second polishing block and the processing pipeline smoother, avoiding the appearance of fish scale patterns. It can automatically classify and polish the processing pipeline, effectively improving the polishing effect and speed of processing the inner wall of the processing pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic diagram of the overall structure of a rapid inner wall polishing device for pipeline processing provided by an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the overall structure of a rapid inner wall polishing device for pipeline processing provided by an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of the internal structure of the traveling mechanism of a rapid inner wall polishing device for pipeline processing provided by an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of the internal structure of the feeding mechanism of a rapid inner wall polishing device for pipeline processing provided by an embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of the internal structure of the polishing mechanism of a rapid inner wall polishing device for pipeline processing provided by an embodiment of the present invention;

[0029] Figure 6 is a schematic diagram of the state when the first connecting pipe and the first liquid supply pipe of a rapid inner wall polishing device for pipeline processing provided by an embodiment of the present invention are connected;

[0030] Figure 7 is a schematic diagram of the state when the second connecting pipe and the second liquid supply pipe of a rapid inner wall polishing device for pipeline processing provided by an embodiment of the present invention are connected;

[0031] Figure 8This is a schematic external structure diagram of the second grinding block of a rapid inner wall grinding device for pipe processing provided by an embodiment of the present invention.

[0032] In the figure: 1, processed pipe; 2, telescopic motor; 3, traveling mechanism; 4, feeding mechanism; 5, grinding mechanism; 31, driving motor; 32, movable support rod; 33, limiting rectangular frame; 34, first compression spring; 35, traveling wheel set; 41, first fixed pipe; 42, second fixed pipe; 43, first infusion pipe; 44, second infusion pipe; 45, fixed support frame; 46, first annular flow groove; 47, second annular flow groove; 51, limiting chute; 52, first grinding slider; 53, second grinding slider; 54, first liquid supply pipe; 55, second liquid supply pipe; 56, first airtight groove; 511, tension spring; 521, third compression spring; 522, second grinding block; 531, first communication pipe; 532, second communication pipe; 533, first liquid spraying port; 534, second liquid spraying port; 535, first grinding block; 561, first pneumatic slider; 562, second compression spring; 563, second airtight groove; 564, second pneumatic slider. Specific embodiments

[0033] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0034] Refer to Figure 1-8 , a rapid inner wall grinding device for pipe processing, including a processed pipe 1 and a telescopic motor 2, and further including:

[0035] A traveling mechanism 3, used for the device to travel along the axis of the processed pipe 1 inside the processed pipe 1 and prevent the device from rotating synchronously with the grinding mechanism;

[0036] A feeding mechanism 4, used for continuously supplying liquid to the rotating grinding mechanism, and two different hollow pipes can continuously supply two different grinding liquids to the grinding mechanism while the grinding mechanism is rotating at a high speed;

[0037] The grinding mechanism 5 can grind the inner wall of the processing pipeline 1, and different grinding effects are provided by changing the rotation speed of the driving motor. At low speeds, the rough mechanism on the inner wall of the processing pipeline can be initially ground by the first grinding block, and at the same time, the first grinding liquid is sprayed out through the first liquid spraying port to accelerate the grinding effect. At high speeds, the first grinding block retracts, and the inner wall of the processing pipeline is further ground by the second grinding block. At the same time, another grinding liquid is sprayed out through the second liquid spraying port to lubricate and cool the grinding area.

[0038] Refer to Figure 2 , one end of the traveling mechanism 3 is fixedly connected to the output shaft of the telescopic motor 2. A driving motor 31 is fixedly installed on the side of the traveling mechanism 3 close to the grinding mechanism 5. A plurality of annularly arranged movable support rods 32 are limitedly and movably sleeved inside the traveling mechanism 3. A first compression spring 34 is fixedly installed between the end of the movable support rod 32 close to the center of the traveling mechanism 3 and the inside of the traveling mechanism 3. One end of the movable support rod 32 extending outside the traveling mechanism 3 is fixedly installed with a limiting rectangular frame 33. A plurality of traveling wheel sets 35 are rotatably connected inside the limiting rectangular frame 33 through bearings, and the axes of the traveling wheel sets 35 are designed to be perpendicular to the axis distribution direction of the processing pipeline 1.

[0039] Refer to Figure 3 , the feeding mechanism 4 includes a first fixed pipe 41 and a second fixed pipe 42. Fixed support frames 45 are fixedly installed on the sides of the first fixed pipe 41 and the second fixed pipe 42. The first fixed pipe 41 and the second fixed pipe 42 are fixedly connected to the traveling mechanism 3 through the fixed support frames 45. The parts of the first fixed pipe 41 and the second fixed pipe 42 in contact with the grinding mechanism 5 are rotatably connected through sealed bearings. A first annular flow groove 46 is formed in the part of the grinding mechanism 5 in contact with the first fixed pipe 41, and a second annular flow groove 47 is formed in the part of the grinding mechanism 5 in contact with the second fixed pipe 42. The interiors of the first fixed pipe 41 and the second fixed pipe 42 are both hollow. The second fixed pipe 42 is sleeved outside the output shaft of the driving motor 31, and the first fixed pipe 41 is sleeved outside the second fixed pipe 42. Two liquid storage cavities provided with pressure pumps are formed inside the traveling mechanism 3. A first infusion pipe 43 is connected between the inside of the first fixed pipe 41 and one of the liquid storage cavities, and a second infusion pipe 44 is connected between the inside of the second fixed pipe 42 and the other liquid storage cavity.

[0040] Furthermore, a groove communicating with the first annular flow groove 46 is formed at the end of the first fixed pipe 41, and a circular groove communicating with the second annular flow groove 47 is also formed at the end of the second fixed pipe 42.

[0041] Refer to Figure 5, a limiting chute 51 is provided inside the grinding mechanism 5. A first grinding slider 52 is limited and movably sleeved inside the limiting chute 51. A second grinding slider 53 is limited and movably sleeved inside the first grinding slider 52. A tension spring 511 is fixedly installed between the first grinding slider 52 and the limiting chute 51. A third compression spring 521 is fixedly installed between the second grinding slider 53 and the first grinding slider 52. A first liquid supply pipe 54 and a second liquid supply pipe 55 are symmetrically provided inside the grinding mechanism 5 relative to the second grinding slider 53. Two groups of first airtight grooves 56 are symmetrically provided inside the grinding mechanism 5 relative to the first grinding slider 52. A first pneumatic slider 561 is limited and hermetically sleeved inside the first airtight groove 56. A second compression spring 562 is fixedly installed between the first pneumatic slider 561 and the inner side wall of the first airtight groove 56. A second airtight groove 563 communicating with the first airtight groove 56 is provided inside the grinding mechanism 5 between the limiting chute 51 and the first airtight groove 56. A second pneumatic slider 564 is hermetically and movably sleeved inside the second airtight groove 563.

[0042] Further, the second pneumatic slider 564 is designed in a T shape, and the smaller end of the second pneumatic slider 564 penetrates through the limiting chute 51 and the first grinding slider 52 to abut against the second grinding slider 53.

[0043] It should be noted that the first liquid supply pipe 54 communicates with the first annular flow groove 46, and the second liquid supply pipe 55 communicates with the second annular flow groove 47.

[0044] Furthermore, one end of the first grinding slider 52 extending to the outside of the grinding mechanism 5 is fixedly installed with a second grinding block 522. A first communication pipe 531 is provided inside the second grinding slider 53. One end of the first communication pipe 531 is close to the first liquid supply pipe 54. The other end of the first communication pipe 531 extends to the outside of the grinding mechanism 5 and is fixedly installed with a first liquid spraying port 533. A second communication pipe 532 is further provided inside the second grinding slider 53. One end of the second communication pipe 532 is close to the second liquid supply pipe 55. The other end of the second communication pipe 532 extends to the outside of the grinding mechanism 5 and is fixedly installed with a second liquid spraying port 534. One end of the second grinding slider 53 located outside the grinding mechanism 5 is fixedly installed with a first grinding block 535. The first grinding block 535 penetrates through the gap of the second grinding block 522 and is hermetically and movably sleeved with the second grinding block 522.

[0045] It should be noted that the first pneumatic slider 561 is designed as a counterweight, and the weight of the first pneumatic slider 561 is greater than the masses of the second grinding slider 53 and the first grinding slider 52.

[0046] It should be noted that both the second grinding block 522 and the first grinding block 535 are designed in an inclined spiral shape, and the grinding fineness of the second grinding block 522 is greater than that of the first grinding block 535.

[0047] The working principle of this rapid inner wall grinding device for pipe processing:

[0048] First, insert the grinding mechanism 5 and the traveling mechanism 3 into the interior of the processing pipe 1, then fix the telescopic motor 2. First, the telescopic motor 2 is energized to extend, driving the traveling mechanism 3 to travel a certain distance inside the processing pipe 1. Further, the rotation of the traveling wheel set 35 causes the traveling mechanism 3 to move inside the processing pipe 1. At the same time, due to the compression of the first compression spring 34, it can ensure that the position of the traveling mechanism 3 is roughly in the central part of the processing pipe 1, and further ensure that the grinding mechanism 5 is in the central position of the processing pipe 1, making the grinding mechanism 5 and the processing pipe 1 coaxial, which is convenient for the grinding mechanism 5 to grind the interior of the processing pipe 1 in contact with the inner side wall of the processing pipe 1 when rotating, and avoiding changes in the internal shape of the processing pipe 1 due to irregular grinding;

[0049] Furthermore, control the driving motor 31 to be energized and start to rotate at a low speed of about 1200 r / min. At this time, the grinding mechanism 5 rotates synchronously with the output shaft of the driving motor 31. Under the action of centrifugal force, referring to Figure 6 , the first grinding slider 52 extends out from the interior of the grinding mechanism 5. At this time, the tension spring 511 is stretched. At the same time, under the action of centrifugal force, the second grinding slider 53 also extends in a direction away from the grinding mechanism 5. At this time, the first grinding block 535 extends out from the gap between the second grinding blocks 522 until it contacts the inner side wall of the processing pipe 1, and can preliminarily grind the relatively rough protrusions on the inner side wall of the processing pipe 1. At the same time, the first grinding slider 52 abuts against the second pneumatic slider 564. At this time, the position of the first liquid supply pipe 54 coincides with the position of the first communication pipe 531, and the grinding liquid containing more grinding fluid in the first annular flow channel 46 enters the interior of the first communication pipe 531 and is further sprayed out through the first liquid spraying port 533, which can soften and lubricate the preliminarily ground place. The grinding efficiency and grinding speed of the grinding area can be improved by automatically spraying the grinding liquid, which is convenient for the first grinding block 535 to achieve a rapid grinding effect on the grinding part and improve the overall grinding speed;

[0050] When the first grinding block 535 finishes the preliminary grinding of the inner wall of the processing pipe 1, increase the rotational speed of the driving motor 31 so that the driving motor 31 rotates at a high speed of 1600 r / min. At this time, under the effect of the increased rotational speed and centrifugal force, the degree of compression of the second compression spring 562 by the first pneumatic slider 561 increases, making the gas pressure between the first pneumatic slider 561 and the second compression spring 562 increase and the internal space decrease. Further, the increased air pressure can push the second pneumatic slider 564 towards the second grinding slider 53, and then push the second grinding slider 53 towards the direction of the tension spring 511, causing the whole second grinding slider 53 to move towards the direction of the tension spring 511, making the first connecting pipe 531 separate from the first liquid supply pipe 54. At the same time, the second grinding slider 53 drives the first grinding block 535 to contract into the inside of the grinding mechanism 5 along the gap of the second grinding block 522. At this time, the device can perform grinding through the second grinding block 522. Refer to Figure 7 , at this time, the second connecting pipe 532 contacts the second liquid supply pipe 55, and the second grinding liquid containing more water and oil in the second annular flow groove 47 enters the inside of the second connecting pipe 532 through the second liquid supply pipe 55, and is discharged through the second liquid spraying port 534 under the action of centrifugal force, which can cool and lubricate the high-speed grinding part, making the grinding part of the second grinding block 522 and the inner wall of the processing pipe 1 smoother, avoiding the deformation of the inner wall of the processing pipe 1 and the appearance of fish-scale patterns caused by the high heat generated during grinding, and improving the grinding effect inside the processing pipe 1. The whole device changes the rotational speed of the driving motor 31 to gradually grind the inner wall of the processing pipe 1 at low speed and high speed respectively. First, it grinds at low speed through the first grinding block 535, and at the same time, softens the inner wall of the processing pipe 1 through the grinding liquid from the first liquid spraying port 533 to accelerate the preliminary grinding effect. Further, when the rotational speed of the driving motor 31 increases, the first grinding block 535 contracts, and it grinds at high speed through the second grinding block 522, and cooperates with the cooling liquid and lubricating liquid from the second liquid spraying port 534 to make the grinding part of the second grinding block 522 and the processing pipe 1 smoother, avoiding the appearance of fish-scale patterns, and effectively improving the grinding effect and speed of the inner wall processing of the processing pipe 1;

[0051] It should be noted that after one section of grinding is completed, the telescopic motor 2 can drive the traveling mechanism 3 and the grinding mechanism 5 to move forward to grind the remaining part of the processing pipe 1, which can penetrate into the inside of the processing pipe 1, not only improving the processing efficiency of the pipe, but also improving the overall processing quality of the processing pipe 1.

[0052] It should be noted that the specific model and specification of the motor need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An inner wall rapid grinding device for pipe processing, comprising a processing pipe (1) and a telescopic motor (2), characterized in that, Further included are: A traveling mechanism (3) for the device to travel along the axis of the processing pipeline inside the processing pipeline and prevent the device from rotating synchronously with the grinding mechanism; A feeding mechanism (4) for continuously supplying liquid to the rotating grinding mechanism, and continuously supplying two different grinding liquids to the grinding mechanism through two different hollow pipelines while the grinding mechanism rotates at high speed; A grinding mechanism (5) for grinding the inner wall of the processing pipeline, providing different grinding effects by changing the rotational speed of the driving motor. At low rotational speed, the rough structure of the inner wall of the processing pipeline is initially ground by the first grinding block, and at the same time, the first grinding liquid is sprayed out through the first liquid spraying port to accelerate the grinding effect. At high rotational speed, the first grinding block retracts, and the inner wall of the processing pipeline is further ground by the second grinding block. At the same time, another grinding liquid is sprayed out through the second liquid spraying port to lubricate and cool the grinding area; A limiting chute (51) is opened inside the grinding mechanism (5), a first grinding slider (52) is limited and movably sleeved inside the limiting chute (51), a second grinding slider (53) is limited and movably sleeved inside the first grinding slider (52), a tension spring (511) is fixedly installed between the first grinding slider (52) and the limiting chute (51), a third compression spring (521) is fixedly installed between the second grinding slider (53) and the first grinding slider (52), a first liquid supply pipe (54) and a second liquid supply pipe (55) are symmetrically opened inside the grinding mechanism (5) relative to the second grinding slider (53), two groups of first airtight grooves (56) are symmetrically opened inside the grinding mechanism (5) relative to the first grinding slider (52), a first pneumatic slider (561) is limited and sealingly sleeved inside the first airtight groove (56), a second compression spring (562) is fixedly installed between the first pneumatic slider (561) and the inner side wall of the first airtight groove (56), a second airtight groove (563) communicating with the first airtight groove (56) is opened inside the grinding mechanism (5) between the limiting chute (51) and the first airtight groove (56), and a second pneumatic slider (564) is sealingly movably sleeved inside the second airtight groove (563); The second pneumatic slider (564) is designed in a T shape, and the smaller end of the second pneumatic slider (564) penetrates through the limiting chute (51) and the first grinding slider (52) to abut against the second grinding slider (53). The first liquid supply pipe (54) communicates with the first annular flow channel (46), and the second liquid supply pipe (55) communicates with the second annular flow channel (47); One end of the first grinding slider (52) extending outside the grinding mechanism (5) is fixedly installed with a second grinding block (522). A first communication pipe (531) is provided inside the second grinding slider (53). One end of the first communication pipe (531) is close to the first liquid supply pipe (54). The other end of the first communication pipe (531) extends outside the grinding mechanism (5) and is fixedly installed with a first liquid spraying port (533). A second communication pipe (532) is also provided inside the second grinding slider (53). One end of the second communication pipe (532) is close to the second liquid supply pipe (55). The other end of the second communication pipe (532) extends outside the grinding mechanism (5) and is fixedly installed with a second liquid spraying port (534). One end of the second grinding slider (53) located outside the grinding mechanism (5) is fixedly installed with a first grinding block (535). The first grinding block (535) passes through the gap of the second grinding block (522) and is hermetically and movably sleeved with the second grinding block (522). The first pneumatic slider (561) is designed with a counterweight, and the weight of the first pneumatic slider (561) is greater than the masses of the second grinding slider (53) and the first grinding slider (52).

2. The inner wall rapid grinding device for pipe processing according to claim 1, characterized in that, One end of the traveling mechanism (3) is fixedly connected to the output shaft of the telescopic motor (2). A driving motor (31) is fixedly installed on one side of the traveling mechanism (3) close to the grinding mechanism (5). A plurality of annularly arranged movable support rods (32) are limited and movably sleeved inside the traveling mechanism (3). A first compression spring (34) is fixedly installed between one end of the movable support rod (32) close to the center of the traveling mechanism (3) and the inside of the traveling mechanism (3). One end of the movable support rod (32) extending outside the traveling mechanism (3) is fixedly installed with a limiting rectangular frame (33). A plurality of traveling wheel sets (35) are rotatably connected inside the limiting rectangular frame (33) through bearings, and the axes of the traveling wheel sets (35) are designed to be perpendicular to the axis distribution direction of the processing pipeline (1).

3. An inner wall rapid grinding device for pipe processing according to claim 2, characterized in that, The feeding mechanism (4) includes a first fixed pipe (41) and a second fixed pipe (42). A fixed support frame (45) is fixedly installed on the sides of the first fixed pipe (41) and the second fixed pipe (42). The first fixed pipe (41) and the second fixed pipe (42) are fixedly connected to the traveling mechanism (3) through the fixed support frame (45). The parts of the first fixed pipe (41) and the second fixed pipe (42) in contact with the grinding mechanism (5) are rotatably connected through sealed bearings. A first annular flow groove (46) is formed in the part of the grinding mechanism (5) in contact with the first fixed pipe (41), and a second annular flow groove (47) is formed in the part of the grinding mechanism (5) in contact with the second fixed pipe (42). The interiors of the first fixed pipe (41) and the second fixed pipe (42) are both hollow-designed. The second fixed pipe (42) is sleeved on the outside of the output shaft of the driving motor (31), and the first fixed pipe (41) is sleeved on the outside of the second fixed pipe (42). Two liquid storage cavities provided with pressure pumps are formed inside the traveling mechanism (3). A first liquid delivery pipe (43) is connected between the interior of the first fixed pipe (41) and one of the liquid storage cavities, and a second liquid delivery pipe (44) is connected between the interior of the second fixed pipe (42) and the other liquid storage cavity.

4. An inner wall rapid grinding device for pipe processing according to claim 3, characterized in that, A groove communicating with the first annular flow groove (46) is formed at the end of the first fixed pipe (41), and a circular groove communicating with the second annular flow groove (47) is also formed at the end of the second fixed pipe (42).

5. A rapid inner wall grinding device for pipe processing according to claim 1, characterized in that, Both the second grinding block (522) and the first grinding block (535) are designed in an inclined spiral shape, and the grinding fineness of the second grinding block (522) is greater than that of the first grinding block (535).

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