Metal pipe fitting polishing device and method

Abstract

The invention relates to the technical field of grinding, and provides a metal pipe fitting grinding device and method.The metal pipe fitting grinding device comprises a grinding wheel and a grinding motor and further comprises a driving plate, a driving shaft, an adjusting mechanism, a walking mechanism and a driving mechanism, the grinding motor is installed on the driving plate, the driving shaft is fixedly connected to the output end of the grinding motor, and the driving shaft is fixedly connected to the output end of the grinding motor; the adjusting mechanism is used for adjusting the distance between the grinding wheel and the driving shaft and comprises a fixing plate, an adjusting plate, a fixing nut, an elastic rod and a grinding frame, the fixing plate is fixedly connected to the end, away from the grinding motor, of the driving shaft, the elastic rod is rotationally connected with the grinding frame, and the grinding wheel is rotationally connected to the grinding frame; and the driving mechanism is used for guaranteeing the stability of the driving plate when the driving plate moves, the driving mechanism is used for driving the fixing plate and the driving plate to move in the metal pipe fitting, and through the technical scheme, the problem that in the prior art, the inner wall of the long metal pipe fitting is inconvenient to polish is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding, and in particular to a metal pipe grinding device and method. Background Art

[0002] Some metal pipe fittings are produced by casting, and their surface roughness is relatively high. After production, metal pipe fittings generally need to be transported and stored for a certain period of time. After being shelved for a long time, the metal surface comes into contact with oxygen to produce an oxide layer, which needs to be polished before welding or use. The polishing of the outer wall of the metal pipe fitting is relatively simple, and a polishing belt can be used. However, there are certain inconveniences in polishing the inner wall of the metal pipe fitting, and it is difficult to use an ordinary polishing head to polish the inner wall.

[0003] At present, the inner wall of metal pipes is mechanically polished by using a flap wheel or a sanding belt. A long throwing rod is extended into the metal pipe to drive the flap wheel to rotate at high speed to achieve the effect of inner pipe polishing. The polishing of shorter metal pipes is relatively simple, but for longer metal pipes, ordinary polishing devices are difficult to achieve. Therefore, we propose a metal pipe polishing device and method, which can perform inner wall polishing on longer metal pipes. Summary of the invention

[0004] The present invention provides a metal pipe grinding device and method, which solves the problem in the prior art that it is inconvenient to grind the inner wall of a long metal pipe.

[0005] The technical solution of the present invention is as follows: A metal pipe grinding device includes a grinding wheel and a grinding motor, and also includes:

[0006] A driving plate, on which the grinding motor is mounted;

[0007] A driving shaft, the driving shaft being fixedly connected to an output end of the grinding motor;

[0008] An adjusting mechanism, the adjusting mechanism is used to adjust the distance between the grinding wheel and the driving shaft, and the adjusting mechanism comprises:

[0009] A fixing plate, the fixing plate being fixedly connected to an end of the driving shaft away from the grinding motor;

[0010] an adjusting plate, the adjusting plate being slidably connected to the driving shaft;

[0011] A fixing nut, wherein two fixing nuts are provided, and the two fixing nuts are located on both sides of the adjusting plate. The outside of the driving shaft is provided with an external thread, and the fixing nut is threadedly connected to the driving shaft;

[0012] Elastic rods, wherein two groups of elastic rods are provided, and the two groups of elastic rods are rotatably connected to the fixed plate and the adjustment plate respectively, and each group of elastic rods is provided with a plurality of elastic rods;

[0013] A grinding frame, the grinding frame is located between the two groups of elastic rods, the elastic rods are rotatably connected to the grinding frame, and the grinding wheel is rotatably connected to the grinding frame;

[0014] A walking mechanism, the walking mechanism is installed on the driving plate, and is used to ensure the stability of the driving plate when the driving plate moves. The walking mechanism includes:

[0015] A swivel seat, the swivel seat is fixedly connected to the driving plate;

[0016] A support frame, the support frame is rotatably connected to the rotating seat via a rotating shaft;

[0017] A limiting plate, wherein the limiting plate is fixedly connected to the end of the rotating shaft, a locking bolt is threadedly connected to the limiting plate, and the locking bolt is in contact with the rotating seat;

[0018] A roller, the roller is rotatably arranged at one end of the support frame away from the driving plate, and the roller is in contact with the inner wall of the metal pipe;

[0019] A driving mechanism, the driving mechanism is used to drive the grinding wheel and the grinding motor to move inside the metal pipe, and the driving mechanism includes:

[0020] A reel with a draw cord wound around it;

[0021] A hook, the hook being fixedly connected to the end of the pull rope;

[0022] A hanging ring is fixedly connected to the fixing plate, and the hook is hung on the hanging ring.

[0023] In order to facilitate the discharge of the debris generated by grinding in the metal pipe fitting, a clamping mechanism is also included, which is used to clamp the metal pipe fitting and adjust the angle of the metal pipe fitting. The clamping mechanism includes:

[0024] Base;

[0025] A rotating frame, the rotating frame is rotatably mounted on the base;

[0026] A clamping assembly, which is mounted on the rotating frame and is used to clamp the metal pipe fittings. The clamping assembly comprises:

[0027] A movable plate, wherein a plurality of movable plates are provided, and the movable plate can be movably arranged on the rotating frame,

[0028] A clamping block, wherein a plurality of clamping blocks are provided, wherein the clamping blocks are fixedly connected to the movable plate, and wherein the clamping blocks are in contact with the outer wall of the metal pipe.

[0029] In order to improve the grinding effect of the inner wall of the metal pipe, a scraping assembly is also included. The scraping assembly is provided with multiple groups. The scraping assembly is installed on the fixed plate and is used to pre-clean the inner wall of the metal pipe. The scraping assembly includes:

[0030] A scraping plate, wherein a plurality of scraping plates are provided, one of the plurality of scraping plates is fixedly connected to the fixing plate, two adjacent scraping plates are slidably matched, and a fixing threaded hole is provided at the bottom of the scraping plate.

[0031] In order to support the metal pipe fittings, a support plate is fixedly connected to the rotating frame for supporting and limiting the metal pipe fittings, and an anti-slip pad is fixedly connected to the support plate.

[0032] The working principle and beneficial effects of the present invention are:

[0033] 1. In the present invention, the elastic rod can be driven to rotate by the movement of the adjusting plate, so as to adjust the distance between the grinding wheel and the driving shaft so that the grinding wheel contacts the inner wall of the metal pipe. The position of the adjusting plate is fixed by the fixing nut, and the driving shaft is driven to rotate by the grinding motor, thereby driving the grinding wheel to grind the inner wall of the metal pipe.

[0034] 2. In the present invention, the edges of the scraping plates are brought into contact with the inner wall of the metal pipe by sliding cooperation between the plurality of scraping plates. When the grinding motor drives the driving shaft to rotate, the scraping plates pre-scrape the inner wall of the metal pipe to scrape off the raised oxides in advance, so as to facilitate the subsequent grinding of the inner wall of the metal pipe by the grinding wheel.

[0035] 3. In the present invention, the roller is brought into contact with the inner wall of the metal pipe by the rotation of the support frame, and the pull rope is wound up by the winding shaft, thereby driving the hanging ring and the fixed plate to move through the hook, and the driving plate can be moved inside the metal pipe by the rotation of the roller. At the same time, the roller limits the driving plate to prevent the driving plate from rotating, and the grinding wheel can be moved inside the longer metal pipe by the pull rope, so as to grind the inner wall of the longer metal pipe.

[0036] 4. In the present invention, the clamping block is driven by the movable plate to clamp the metal pipe, and the metal pipe is rotated to an inclined state by the rotating frame, so that the debris generated by grinding can fall out from the inside of the metal pipe in time.

[0037] 5. Therefore, compared with the metal pipe grinding device in the prior art, the present invention adjusts the position of the grinding wheel by moving the adjusting plate, so that the grinding wheel contacts the inner wall of the metal pipe, and at the same time, the scraping plate contacts the inner wall of the metal pipe by sliding between multiple scraping plates, so that the inner walls of metal pipes with different diameters can be scraped and polished, the support frame rotates to make the roller contact the inner wall of the metal pipe, and the driving plate is prevented from rotating while the movement of the driving plate is realized. The pull rope is reeled up by the reel-up shaft, and the fixed plate is pulled to move inside the metal pipe. The grinding motor drives the driving shaft to rotate, and drives the scraping plate to scrape the inner wall of the metal pipe. At the same time, the grinding wheel polishes the inner wall of the metal pipe, and the metal pipe is driven to rotate by the rotating frame to make the debris in the metal pipe fall out in time, so that the inner wall of the longer metal pipe can be polished. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Figure 1 It is a structural schematic diagram of the first viewing angle of the present invention;

[0040] Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention;

[0041] Figure 3 It is a structural schematic diagram of the clamping mechanism of the present invention;

[0042] Figure 4 It is a schematic structural diagram of the driving plate, driving shaft, adjusting mechanism and traveling mechanism of the present invention;

[0043] Figure 5 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at point A in the middle;

[0044] Figure 6 For the present invention Figure 2 A schematic diagram of the partially enlarged structure at B in the middle;

[0045] Figure 7 For the present invention Figure 4 Schematic diagram of the partially enlarged structure at point C in the middle.

[0046] In the figure:

[0047] 1. Grinding wheel; 2. Grinding motor; 3. Driving plate; 4. Driving shaft; 5. Support plate;

[0048] 101, fixing plate; 102, adjusting plate; 103, fixing nut; 104, elastic rod; 105, grinding frame;

[0049] 201, rotating seat; 202, supporting frame; 203, limiting plate; 204, rotating roller;

[0050] 301, reel; 302, hook; 303, hanging ring; 304, pull rope; 305, reeling motor;

[0051] 401, base; 402, rotating frame; 403, driving motor;

[0052] 501, moving plate; 502, clamping block; 503, electric cylinder;

[0053] 601. Scraper plate. DETAILED DESCRIPTION

[0054] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] Embodiment 1, as Figures 1 to 7 As shown, this embodiment proposes a metal pipe grinding device, including a grinding wheel 1 and a grinding motor 2, and also includes a driving plate 3, a driving shaft 4, an adjustment mechanism, a walking mechanism and a driving mechanism. Compared with the metal pipe grinding device in the prior art, the present invention adjusts the position of the grinding wheel 1 by moving the adjustment plate 102, so that the grinding wheel 1 contacts the inner wall of the metal pipe, and at the same time, the scraping plates 601 contact the inner wall of the metal pipe by sliding between multiple scraping plates 601, so that the inner wall of the metal pipe with different diameters can be scraped and polished. The support frame 202 rotates to The roller 204 contacts the inner wall of the metal pipe to realize the movement of the driving plate 3 while preventing the driving plate 3 from rotating. The pull rope 304 is wound up by the winding shaft 301, and the fixed plate 101 is pulled to move inside the metal pipe. The grinding motor 2 drives the driving shaft 4 to rotate, and drives the scraping plate 601 to scrape the inner wall of the metal pipe. At the same time, the grinding wheel 1 grinds the inner wall of the metal pipe. The metal pipe is driven to rotate by the rotating frame 402, so that the debris in the metal pipe falls out in time, so that the inner wall of the longer metal pipe can be polished.

[0056] The grinding motor 2 is fixedly mounted on the driving plate 3 , and the driving shaft 4 is fixedly connected to the output end of the grinding motor 2 . The grinding motor 2 can drive the driving shaft 4 to rotate.

[0057] The adjusting mechanism is used to adjust the distance between the grinding wheel 1 and the driving shaft 4. The adjusting mechanism includes a fixing plate 101, an adjusting plate 102, a fixing nut 103, an elastic rod 104 and a grinding frame 105. The fixing plate 101 is fixedly connected to the end of the driving shaft 4 away from the grinding motor 2. The adjusting plate 102 is slidably connected to the driving shaft 4. A through hole for the driving shaft 4 to pass through is provided on the adjusting plate 102. A slider is provided inside the through hole. A slide groove matching the slider is provided on the driving shaft 4. Two fixing nuts 103 are provided. The two fixing nuts 103 are located on both sides of the adjusting plate 102. The outside of the driving shaft 4 is provided with an external thread. The fixing nut 103 is threadedly connected to the driving shaft 4. Two groups of elastic rods 104 are provided. The two groups of elastic rods 104 are rotatably connected to the fixing plate 101 and the adjusting plate 102 respectively. Each group of elastic rods 104 is provided with a plurality of elastic rods. The grinding frame 105 The grinding wheel 1 is rotatably connected to the grinding frame 105 by rotating the two sets of elastic rods 104. The fixing plate 101, the adjusting plate 102 and the driving plate 3 are circular plates with smaller diameters, and their diameters are smaller than the inner diameters of the metal pipe fittings. The metal pipe fitting grinding device can be inserted into the interior of the metal pipe fittings. The position of the adjusting plate 102 can be moved by rotating the fixing nut 103, so that the two sets of elastic rods 104 are rotated, so that the rotating frame 402 drives the grinding wheel 1 to contact the inner wall of the metal pipe fitting, and then the two fixing nuts 103 are rotated to make them close to the two ends of the adjusting plate 102, so as to fix the position of the adjusting plate 102, thereby fixing the position of the grinding wheel 1, and driving the driving shaft 4 to rotate by the grinding motor 2, so as to drive the grinding wheel 1 to grind the inner wall of the metal pipe fitting, thereby realizing the grinding of the inner wall of the metal pipe fittings with different inner diameters.

[0058] The walking mechanism is installed on the driving plate 3, and is used to ensure the stability of the driving plate 3 when the driving plate 3 moves. The walking mechanism includes a swivel seat 201, a support frame 202 and a limit plate 203. The swivel seat 201 is fixedly connected to the driving plate 3, and the support frame 202 is rotatably connected to the swivel seat 201 through a rotating shaft. The limit plate 203 is fixedly connected to the end of the rotating shaft. A locking bolt is threadedly connected to the limit plate 203, and the locking bolt is in contact with the swivel seat 201. The roller 204 is rotatably arranged at one end of the support frame 202 away from the driving plate 3, and the roller 204 is in contact with the inner wall of the metal pipe, and the rotation direction of the roller 204 is the axial direction of the metal pipe. By rotating the support frame 202, the roller 204 can be pressed against the inner wall of the metal pipe. Tightening the locking bolt and pressing it on the swivel seat 201 can fix the limit plate 203, thereby fixing the position of the support frame 202. The elastic rod 104 and the roller 204 have a certain elasticity and can adapt to a certain degree of ups and downs of the inner wall of the metal pipe. The rotation of the roller 204 can realize the axial movement of the drive plate 3 along the metal pipe. At the same time, the sliding damping between the roller 204 and the inner wall of the metal pipe is large, which can avoid the circumferential rotation of the roller 204 and the drive plate 3 along the metal pipe, thereby ensuring the stability of the drive plate 3, so that the output shaft of the grinding motor 2 drives the drive shaft 4 to rotate.

[0059] The driving mechanism is used to drive the grinding wheel 1 and the grinding motor 2 to move inside the metal pipe. The driving mechanism includes a winding shaft 301, a hook 302 and a hanging ring 303. A pull rope 304 is wound around the winding shaft 301. The hook 302 is fixedly connected to the end of the pull rope 304. The hanging ring 303 is fixedly connected to the fixed plate 101. The hook 302 and the hanging ring 303 are hung. A matching winding motor 305 is arranged on the winding shaft 301, which can be used to rotate the winding shaft 301. During winding and unwinding, the hook 302 is placed inside the metal pipe to be polished, and the metal pipe is tilted. The hook 302 passes through the metal pipe under the action of gravity, and the hook 302 is hung on the hanging ring 303. The winding motor 305 is used to wind up the winding shaft 301, which can drive the pull rope 304 to pull the fixed plate 101, so that the metal pipe polishing device moves inside the metal pipe, thereby realizing the polishing of the inner wall of the longer metal pipe.

[0060] In order to facilitate the discharge of the debris generated by grinding in the metal pipe fitting, a clamping mechanism is also included. The clamping mechanism is used to clamp the metal pipe fitting and adjust the angle of the metal pipe fitting. The clamping mechanism includes a base 401, a rotating frame 402 and a clamping assembly. The rotating frame 402 can be rotatably mounted on the base 401. A driving motor 403 is arranged on the base 401. The rotating frame 402 is fixedly connected to the output end of the driving motor 403. The clamping assembly is mounted on the rotating frame 402 and is used to clamp the metal pipe fitting. The clamping assembly includes a moving plate 501. and clamping blocks 502, a plurality of movable plates 501 are provided, the movable plates 501 are movably provided on the rotating frame 402, two electric cylinders 503 are provided on the rotating frame 402, two movable plates 501 are provided, the movable plates 501 and the electric cylinders 503 correspond to each other, the movable plate 501 is provided at the output end of the electric cylinder 503, a plurality of clamping blocks 502 are provided, the clamping blocks 502 are fixedly connected to the movable plate 501, the clamping blocks 502 are in contact with the outer wall of the metal pipe fitting, the clamping blocks 502 are wedge-shaped, and a plurality of groups of clamping blocks are provided on the movable plate 501 Block 502, the clamping blocks 502 are arranged in pairs, and the clamping blocks 502 in each group correspond to each other in the vertical direction, so that the metal pipe fittings can be clamped between the two corresponding clamping blocks 502 above and below. In order to support the metal pipe fittings, a support plate 5 is fixedly connected to the rotating frame 402 for supporting and limiting the metal pipe fittings. The support plate 5 is fixedly connected to the anti-skid pad. The initial rotating frame 402 is in a horizontal state. First, the metal pipe fittings are placed on the support plate 5, and the metal pipe fittings are supported by the support plate 5. The stability of the metal pipe fittings is ensured by the anti-skid pad, and then The electric cylinder 503 drives the movable plate 501 to approach the metal pipe fitting, and drives the clamping block 502 to clamp the metal pipe fitting to ensure its stability during the grinding process. It should be noted that the height of the support plate 5 can be adjusted. Specifically, the electric cylinder 503 is installed on the rotating frame 402, and the support plate 5 is fixedly connected to the output end of the electric cylinder 503. The support plate 5 can be driven to rise and fall by the electric cylinder 503, so that the center position of the metal pipe fitting corresponds to the center position between the two corresponding clamping blocks 502 above and below, which is convenient for the clamping block 502 to clamp the metal pipe fitting.

[0061] In order to improve the grinding effect of the inner wall of the metal pipe fitting, a scraping assembly is also included. The scraping assembly is provided with multiple groups. The scraping assembly is installed on the fixed plate 101 and is used to pre-clean the inner wall of the metal pipe fitting. The scraping assembly includes a scraping plate 601. The scraping plate 601 is provided with multiple scraping plates. One of the multiple scraping plates 601 is fixedly connected to the fixed plate 101. The two adjacent scraping plates 601 are slidably matched. The bottom of the scraping plate 601 is provided with a fixed threaded hole. One end of the scraping plate 601 is fixedly connected to a slider. The scraping plate 60 The other end of 1 is provided with a slide groove matching with the slider, which can realize the sliding between the two scraping plates 601, so that the length of the multiple scraping plates 601 can be adjusted, so that the outer side of the multiple scraping plates 601, that is, the side away from the driving shaft 4, contacts the inner wall of the metal pipe fitting, and the fixed plate 101 and the scraping plate 601 are driven by the driving shaft 4 to rotate to scrape off the oxide on the inner wall of the metal pipe fitting, and the fixed plate 101 is in the front position of the movement, and the scraping plate 601 scrapes the inner wall of the metal pipe fitting in advance, which is convenient for the subsequent grinding of the inner wall of the metal pipe fitting.

[0062] Embodiment 2: This embodiment also discloses a method for grinding a metal pipe, using the above-mentioned metal pipe grinding device, comprising the following steps:

[0063] S1. Place the metal pipe on the support plate 5, and the moving plate 501 drives the clamping block 502 to clamp the metal pipe;

[0064] S2, the hook 302 drives the pull rope 304 to pass through the metal pipe and hang it on the hanging ring 303;

[0065] S3, rotating the fixing nut 103, so that the adjustment moves on the driving shaft 4, driving the elastic rod 104 to rotate, so that the grinding wheel 1 moves to a position in contact with the inner wall of the metal pipe;

[0066] S4, sliding the scraping plate 601 to adjust one scraping plate 601 to a position in contact with the inner wall of the metal pipe, screwing the pre-prepared fixing bolt into the locking screw hole to fix the scraping plate 601;

[0067] S5, rotating the support frame 202 to move the roller 204 to a position in contact with the inner wall of the metal pipe, and tightening the locking bolts to fix the position of the support frame 202;

[0068] S6, extend the fixing plate 101 into the metal pipe fitting, make the grinding wheel 1 contact the inner wall of the metal pipe fitting, initially fix the driving plate 3, the grinding motor 2 drives the driving shaft 4 to rotate, the scraping plate 601 scrapes the inner wall of the metal pipe fitting, and the grinding wheel 1 grinds the inner wall of the metal pipe fitting;

[0069] S7, the reel 301 reels the pull rope 304, driving the fixed plate 101 to move, the grinding wheel 1 moves toward the inside of the metal pipe, and grinds the inner wall of the metal pipe at the same time, the roller 204 contacts the inner wall of the metal pipe, limits the driving plate 3, and makes the driving plate 3 move forward at the same time;

[0070] S8. The pull rope 304 pulls the fixing plate 101 out of the metal pipe. During this process, the rotating frame 402 drives the metal pipe to rotate to an inclined state, so that the grinding debris is discharged from the metal pipe.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal pipe grinding device, comprising a grinding wheel (1) and a grinding motor (2), characterized in that: It also includes a driving plate (3), a driving shaft (4), an adjusting mechanism, a walking mechanism and a driving mechanism; The grinding motor (2) is mounted on the driving plate (3), and the driving shaft (4) is fixedly connected to the output end of the grinding motor (2); Wherein, the adjustment mechanism is used to adjust the distance between the grinding wheel (1) and the driving shaft (4); Wherein, the walking mechanism is installed on the driving plate (3) and is used to ensure the stability of the driving plate (3) when the driving plate (3) moves; The driving mechanism is used to drive the grinding wheel (1) and the grinding motor (2) to move inside the metal pipe.

2. A metal pipe grinding device according to claim 1, characterized in that: The regulating mechanism comprises: A fixing plate (101), the fixing plate (101) being fixedly connected to an end of the driving shaft (4) away from the grinding motor (2); an adjustment plate (102), the adjustment plate (102) being slidably connected to the drive shaft (4); A fixing nut (103), wherein two fixing nuts (103) are provided, and the two fixing nuts (103) are located on both sides of the adjustment plate (102); an external thread is provided on the outside of the driving shaft (4), and the fixing nut (103) and the driving shaft (4) are threadedly connected.

3. A metal pipe grinding device according to claim 2, characterized in that: The regulating mechanism comprises: Elastic rods (104), wherein two groups of the elastic rods (104) are provided, and the two groups of the elastic rods (104) are rotatably connected to the fixed plate (101) and the adjustment plate (102), respectively, and each group of the elastic rods (104) is provided with a plurality of the elastic rods; A grinding frame (105), the grinding frame (105) is located between the two groups of elastic rods (104), the elastic rods (104) and the grinding frame (105) are rotatably connected, and the grinding wheel (1) is rotatably connected to the grinding frame (105).

4. A metal pipe grinding device according to claim 3, characterized in that: The walking mechanism comprises: A rotating seat (201), wherein the rotating seat (201) is fixedly connected to the driving plate (3); A support frame (202), wherein the support frame (202) is rotatably connected to the rotating base (201) via a rotating shaft.

5. A metal pipe grinding device according to claim 4, characterized in that: The walking mechanism comprises: a limit plate (203), the limit plate (203) is fixedly connected to the end of the rotating shaft, a locking bolt is threadedly connected to the limit plate (203), and the locking bolt is in contact with the rotating seat (201); A rotating roller (204) is rotatably arranged at one end of the support frame (202) away from the driving plate (3), and the rotating roller (204) is in contact with the inner wall of the metal pipe.

6. A metal pipe grinding device according to claim 5, characterized in that: The driving mechanism comprises: A reel (301), a drawstring (304) being wound around the reel (301); A hook (302), the hook (302) being fixedly connected to the end of the pull rope (304); A hanging ring (303), wherein the hanging ring (303) is fixedly connected to the fixing plate (101), and the hook (302) is hung on the hanging ring (303).

7. A metal pipe grinding device according to claim 6, characterized in that: It also includes a clamping mechanism, which is used to clamp the metal pipe and adjust the angle of the metal pipe. The clamping mechanism includes: Base (401); A rotating frame (402), the rotating frame (402) being rotatably mounted on the base (401); A clamping assembly is mounted on the rotating frame (402) and is used to clamp the metal pipe.

8. A metal pipe grinding device according to claim 7, characterized in that: The clamping assembly comprises: A movable plate (501), wherein a plurality of movable plates (501) are provided, and the movable plates (501) are movably provided on the rotating frame (402), A clamping block (502), wherein a plurality of the clamping blocks (502) are provided, wherein the clamping block (502) is fixedly connected to the movable plate (501), and wherein the clamping block (502) is in contact with the outer wall of the metal pipe.

9. A metal pipe grinding device according to claim 8, characterized in that: It also includes a scraping assembly, wherein the scraping assembly is provided in multiple groups, and the scraping assembly is installed on the fixing plate (101) and is used for pre-cleaning the inner wall of the metal pipe. The scraping assembly includes: A scraping plate (601), wherein a plurality of the scraping plates (601) are provided, wherein one of the plurality of scraping plates (601) is fixedly connected to the fixing plate (101), and two adjacent scraping plates (601) are slidably matched, and a fixing threaded hole is provided at the bottom of the scraping plate (601).

10. A metal pipe grinding device according to claim 9, characterized in that: The rotating frame (402) is fixedly connected to a support plate (5) for supporting and limiting the position of the metal pipe fittings, and the support plate (5) is fixedly connected to an anti-slip pad.

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