Inner wall grinding device for galvanized steel pipe

Abstract

The utility model relates to the technical field of steel pipe machining, in particular to an inner wall polishing device for a galvanized steel pipe. The technical problems that in the process of polishing the inner wall of a galvanized steel pipe, due to the fact that clamping and fixing of a pipeline are lacked, the pipeline is prone to being affected by vibration of a polishing device in the polishing period to deviate and slide, and the inner wall of the pipeline is polished unevenly are solved. According to the technical scheme, the inner wall grinding device for the galvanized steel pipe comprises a positioning assembly, a rotating assembly, a clamping assembly, a sliding assembly and a grinding assembly; compared with a traditional steel pipe inner wall polishing device, the steel pipe inner wall polishing device has the advantages that one end of a steel pipe can be positioned and limited before the steel pipe is polished through matched use of the positioning structure and the clamping structure, the steel pipe can be prevented from being pushed outwards by the polishing device, and the positioned and limited steel pipe can be clamped and fixed through the clamping structure; the steel pipe can be prevented from being driven by the polishing device to rotate, stability of the device is kept, and the polishing quality of the steel pipe is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe processing, in particular to an inner wall grinding device for galvanized steel pipes. Background Art

[0002] Galvanized steel pipe is a kind of pipe that improves its corrosion resistance by coating the surface with a layer of zinc. The galvanizing process can effectively prevent the chemical reaction between the steel pipe and moisture, oxygen, etc. in the atmosphere, thereby extending the service life of the steel pipe. Galvanized steel pipe is widely used in construction, bridges, vehicle manufacturing, furniture, agricultural irrigation and other fields. Galvanized steel pipe has good corrosion resistance, long service life, good welding performance and mechanical properties. During the use of galvanized steel pipe, a grinding device is required to grind the inner wall of the pipe. Due to the lack of clamping and fixing of the pipe, the pipe is easily affected by the vibration of the grinding device during grinding and deflects and slides, resulting in uneven grinding of the inner wall of the pipe, affecting the grinding quality of the pipe. Utility Model Content

[0003] In order to overcome the problem that during the use of galvanized steel pipes, a grinding device is needed to grind the inner wall of the pipe. Due to the lack of clamping and fixing of the pipe, the pipe is easily affected by the vibration of the grinding device during grinding and causes displacement and sliding, resulting in uneven grinding of the inner wall of the pipe, affecting the grinding quality of the pipe.

[0004] The technical solution of the utility model is: a device for grinding the inner wall of a galvanized steel pipe, comprising a galvanized steel pipe body, a positioning assembly, a supporting assembly, a rotating assembly, a clamping assembly, a sliding assembly and a grinding assembly; a positioning assembly is provided at one end of the galvanized steel pipe body, a supporting assembly is provided on the bottom surface of the positioning assembly, a rotating assembly is provided on the top surface of the supporting assembly, a clamping assembly is provided on the inner side of the rotating assembly, the clamping assembly is provided on the outer side of the galvanized steel pipe body, a sliding assembly is provided on the top surface of the supporting assembly, a grinding assembly is provided on the top surface of the sliding assembly, and the grinding assembly is provided on the inner side of the galvanized steel pipe body.

[0005] Preferably, the positioning assembly can limit one end of the steel pipe to prevent the steel pipe from sliding outward during grinding, the supporting assembly can provide stable support for the entire device to prevent the device from sliding during operation, the rotating assembly can drive the clamping assembly to rotate, so that the clamped steel pipe can be turned around to facilitate grinding the other end of the steel pipe, the clamping assembly can clamp and fix the steel pipe to prevent the steel pipe from rotating during grinding to avoid affecting the grinding effect, the sliding assembly can drive the grinding assembly to move, and facilitate driving the grinding assembly into the steel pipe, the grinding assembly can grind the inner wall of the steel pipe, and the grinding position can be adjusted inside the steel pipe.

[0006] Preferably, the positioning assembly includes a positioning seat, a positioning groove, a positioning column, a positioning telescopic rod and a positioning support plate; a positioning seat is provided at the other end of the galvanized steel pipe body, a positioning groove is provided on the side of the positioning seat, the galvanized steel pipe body is arranged on the inner side of the positioning groove, a positioning column is provided on the side of the positioning seat, the positioning column is arranged on the inner side of the galvanized steel pipe body, a positioning telescopic rod is provided on the other side of the positioning seat, a positioning support plate is provided on the outer side of the positioning telescopic rod, the positioning support plate is fixedly connected to the positioning telescopic rod, the positioning column is inserted into the inner side of one end of the steel pipe, the steel pipe is inserted into the positioning groove on the positioning seat, thereby positioning and restricting one end of the steel pipe to prevent the steel pipe from sliding outward, and the positioning seat is pushed to move by the positioning telescopic rod, so as to facilitate positioning and restricting steel pipes of different lengths.

[0007] Preferably, the support assembly includes a support base plate, a support column and an anti-slip pad; the bottom surface of the positioning support plate is provided with a support base plate, the bottom surface of the support base plate is provided with a support column, four groups of support columns are provided, and the bottom surface of the support column is provided with an anti-slip pad. The support base plate and the support column are used to provide support for the device, and the anti-slip pad is used to prevent the device from deviating and sliding.

[0008] Preferably, the rotating assembly includes a rotating motor, a rotating shaft and a rotating frame; the top surface of the supporting base plate is provided with a rotating motor, the output end of the rotating motor is provided with a rotating shaft, and the top surface of the rotating shaft is provided with a rotating frame. The rotating motor is used to drive the rotating shaft to rotate, thereby driving the rotating frame to rotate, so that the clamped steel pipe is turned around to facilitate grinding the other end of the steel pipe.

[0009] Preferably, the clamping assembly includes a clamping threaded rod, a clamping knob, a clamping slide rod, a sliding clamp block and a rubber pad; a clamping threaded rod is provided on the inner side of the rotating frame, a clamping knob is provided on the other end of the clamping threaded rod, a clamping slide rod is provided on the inner side of the rotating frame, a sliding clamp block is provided on the outer side of the clamping slide rod, the sliding clamp block is provided on the outer side of the clamping threaded rod, two groups of sliding clamp blocks are provided, and rubber pads are provided on the sides of the sliding clamp blocks. The clamping threaded rod is driven to rotate by the clamping knob, and the sliding clamp blocks are driven to slide synchronously on the clamping slide rod by two groups of opposing threads on the clamping threaded rod to clamp and fix the positioned and restricted steel pipe, and the friction between the sliding clamp block and the steel pipe is increased by the rubber pad to prevent the steel pipe from rotating during grinding and to avoid affecting the grinding quality of the steel pipe.

[0010] Preferably, the sliding assembly includes a sliding fixed frame, a sliding motor, a sliding threaded rod and a supporting slider; a sliding fixed frame is arranged on the top surface of the supporting base plate, a sliding motor is arranged on the side of the sliding fixed frame, a sliding threaded rod is arranged at the output end of the sliding motor, the sliding threaded rod is arranged on the inner side of the sliding fixed frame, and a supporting slider is arranged on the outer side of the sliding threaded rod. The sliding threaded rod is driven to rotate by the sliding motor, and the supporting slider is driven to slide on the sliding threaded rod, so as to push the grinding head into the inner side of the steel pipe, thereby facilitating the grinding of the steel pipe.

[0011] Preferably, the grinding assembly includes a support plate, a grinding motor, an electric telescopic rod, a grinding head and a cleaning brush; a support plate is provided on the top surface of the support slider, a grinding motor is provided on the side of the support plate, an electric telescopic rod is provided at the output of the grinding motor, a grinding head is provided at the other end of the electric telescopic rod, and a cleaning brush is provided on the outside of the electric telescopic rod. The electric telescopic rod is driven to rotate by the grinding motor, and the inner wall of the steel pipe is grinded by driving the grinding head to rotate. During the grinding process, the electric telescopic rod is used to push the grinding head to move inside the steel pipe, which is convenient for grinding different positions. The cleaning brush can be used to brush away the waste chips attached to the inner wall of the steel pipe after grinding, which is convenient for subsequent cleaning.

[0012] Beneficial effects of the utility model:

[0013] 1. Compared with the traditional galvanized steel pipe inner wall grinding device, when grinding the inner wall of the pipe, due to the lack of clamping and fixing of the pipe, the pipe is easily affected by the vibration of the grinding device during grinding and deflects and slides, resulting in uneven grinding of the inner wall of the pipe, affecting the grinding quality of the pipe. By setting the positioning structure and the clamping structure, one end of the steel pipe can be positioned and restricted before grinding the steel pipe, which can prevent the steel pipe from being pushed outward by the grinding device. The clamping structure can clamp and fix the steel pipe that is positioned and restricted, which can prevent the steel pipe from being driven to rotate by the grinding device, maintain the stability of the device, and avoid affecting the grinding quality of the steel pipe;

[0014] 2. Insert the positioning pin into the inner side of one end of the steel pipe, so that the steel pipe is inserted into the positioning groove on the positioning seat, thereby positioning and limiting one end of the steel pipe to prevent the steel pipe from sliding outward. Use the positioning telescopic rod to push the positioning seat to move, so as to facilitate positioning and limiting steel pipes of different lengths. Drive the clamping threaded rod to rotate through the clamping knob, and use the two sets of facing threads on the clamping threaded rod to drive the sliding clamp block to slide synchronously on the clamping slide rod to clamp and fix the steel pipe to be positioned and limited. Increase the friction between the sliding clamp block and the steel pipe through the rubber pad to prevent the steel pipe from rotating during grinding, so as to avoid affecting the grinding quality of the steel pipe.

[0015] 3. Use a sliding motor to drive the sliding threaded rod to rotate, drive the supporting slider to slide on the sliding threaded rod, push the grinding head to enter the inner side of the steel pipe, use the grinding motor to drive the electric telescopic rod to rotate, drive the grinding head to rotate to grind the inner wall of the steel pipe, and use the electric telescopic rod to push the grinding head to move inside the steel pipe during the grinding process, so as to facilitate grinding at different positions, and use a cleaning brush to brush away the waste chips attached to the inner wall of the steel pipe for subsequent cleaning. After grinding, use a rotating motor to drive the rotating shaft to rotate, and drive the rotating frame to rotate, so that the clamped steel pipe can be turned around, so as to facilitate grinding the other end of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of an inner wall grinding device for a galvanized steel pipe according to the utility model;

[0017] Figure 2 What is shown is a three-dimensional structure schematic diagram of a positioning assembly of an inner wall grinding device for a galvanized steel pipe according to the utility model;

[0018] Figure 3 What is shown is a schematic diagram of the three-dimensional structure of a clamping assembly of an inner wall grinding device for a galvanized steel pipe according to the utility model;

[0019] Figure 4 What is shown is a three-dimensional structural schematic diagram of a grinding component of an inner wall grinding device for a galvanized steel pipe according to the utility model;

[0020] Explanation of the accompanying drawings: 1. Galvanized steel pipe body; 2. Positioning assembly; 3. Support assembly; 4. Rotating assembly; 5. Clamping assembly; 6. Sliding assembly; 7. Grinding assembly; 201. Positioning seat; 202. Positioning slot; 203. Positioning plug column; 204. Positioning telescopic rod; 205. Positioning support plate; 301. Support base plate; 302. Support column; 303. Anti-skid pad; 401. Rotating motor; 402. Rotating shaft; 403. Rotating frame; 501. Clamping threaded rod; 502. Clamping knob; 503. Clamping slide rod; 504. Sliding clamp block; 505. Rubber pad; 601. Sliding fixed frame; 602. Sliding motor; 603. Sliding threaded rod; 604. Support slider; 701. Support plate; 702. Grinding motor; 703. Electric telescopic rod; 704. Grinding head; 705. Cleaning brush. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1The utility model provides an embodiment: a device for grinding the inner wall of a galvanized steel pipe, comprising a galvanized steel pipe body 1, a positioning component 2, a supporting component 3, a rotating component 4, a clamping component 5, a sliding component 6 and a grinding component 7; a positioning component 2 is arranged at one end of the galvanized steel pipe body 1, a supporting component 3 is arranged at the bottom surface of the positioning component 2, a rotating component 4 is arranged at the top surface of the supporting component 3, a clamping component 5 is arranged at the inner side of the rotating component 4, the clamping component 5 is arranged at the outer side of the galvanized steel pipe body 1, a sliding component 6 is arranged at the top surface of the supporting component 3, a grinding component 7 is arranged at the top surface of the sliding component 6, and the grinding component 7 is arranged at the inner side of the galvanized steel pipe body 1, the positioning component 2 is arranged at the bottom surface of the positioning component 2, a rotating component 4 is arranged at the top surface of the supporting component 3, a clamping component 5 is arranged at the inner side of the rotating component 4, the clamping component 5 is arranged at the outer side of the galvanized steel pipe body 1, a sliding component 6 is arranged at the top surface of the sliding component 6, a grinding component 7 is arranged at the inner side of the galvanized steel pipe body 1, The positioning component 2 can limit one end of the steel pipe to prevent the steel pipe from sliding outward during grinding. The supporting component 3 can provide stable support for the entire device to prevent the device from sliding during operation. The rotating component 4 can drive the clamping component 5 to rotate, so that the clamped steel pipe can be turned around to facilitate grinding the other end of the steel pipe. The clamping component 5 can clamp and fix the steel pipe to prevent the steel pipe from rotating during grinding to avoid affecting the grinding effect. The sliding component 6 can drive the grinding component 7 to move, so as to facilitate driving the grinding component 7 into the steel pipe. The grinding component 7 can grind the inner wall of the steel pipe and adjust the grinding position inside the steel pipe.

[0023] See also Figure 2-4In this embodiment, the positioning assembly 2 includes a positioning seat 201, a positioning groove 202, a positioning column 203, a positioning telescopic rod 204 and a positioning support plate 205; the other end of the galvanized steel pipe body 1 is provided with a positioning seat 201, a positioning groove 202 is provided on the side of the positioning seat 201, the galvanized steel pipe body 1 is arranged on the inner side of the positioning groove 202, a positioning column 203 is provided on the side of the positioning seat 201, the positioning column 203 is arranged on the inner side of the galvanized steel pipe body 1, a positioning telescopic rod 204 is provided on the other side of the positioning seat 201, and a positioning support plate 205 is provided on the outer side of the positioning telescopic rod 204, and the positioning support plate 205 is fixedly connected to the positioning telescopic rod 204, by inserting the positioning column 203 into the inner side of one end of the steel pipe, the steel pipe is inserted into the positioning groove 202 on the positioning seat 201, so that one end of the steel pipe is positioned and restricted to prevent the steel pipe from sliding outward, and the positioning seat 201 is pushed to move by the positioning telescopic rod 204, so as to facilitate the unfixed The steel pipes of the same length are used for positioning and limiting. The support assembly 3 includes a support base plate 301, a support column 302 and an anti-skid pad 303. The bottom surface of the positioning support plate 205 is provided with a support base plate 301, and the bottom surface of the support base plate 301 is provided with a support column 302. The support column 302 is provided with four groups, and the bottom surface of the support column 302 is provided with an anti-skid pad 303. The support base plate 301 and the support column 302 are used to provide support for the device, and the anti-skid pad 303 is used to prevent the device from deflecting and sliding. The rotating assembly 4 includes a rotating motor 401, a rotating shaft 402 and a rotating frame 403; the rotating motor 401 is arranged on the top surface of the supporting base plate 301, the rotating shaft 402 is arranged at the output end of the rotating motor 401, and the rotating frame 403 is arranged on the top surface of the rotating shaft 402. The rotating motor 401 drives the rotating shaft 402 to rotate, thereby driving the rotating frame 403 to rotate, so that the clamped steel pipe is turned around to facilitate the grinding of the other end of the steel pipe.

[0024] The clamping assembly 5 includes a clamping threaded rod 501, a clamping knob 502, a clamping slide bar 503, a sliding clamp block 504 and a rubber pad 505; the inner side of the rotating frame 403 is provided with a clamping threaded rod 501, the other end of the clamping threaded rod 501 is provided with a clamping knob 502, the inner side of the rotating frame 403 is provided with a clamping slide bar 503, the outer side of the clamping slide bar 503 is provided with a sliding clamp block 504, the sliding clamp block 504 is provided on the outer side of the clamping threaded rod 501, two groups of sliding clamp blocks 504 are provided, and the side of the sliding clamp block 504 is provided with a rubber pad 505, and the clamping threaded rod 501 is driven to rotate by the clamping knob 502 The two sets of threads on the clamping threaded rod 501 are used to drive the sliding clamp block 504 to slide synchronously on the clamping slide rod 503, so as to clamp and fix the steel pipe to be positioned and restricted. The friction between the sliding clamp block 504 and the steel pipe is increased by the rubber pad 505 to prevent the steel pipe from rotating during grinding, so as to avoid affecting the grinding quality of the steel pipe. The sliding assembly 6 includes a sliding fixed frame 601, a sliding motor 602, a sliding threaded rod 603 and a supporting slider 604; the top surface of the supporting bottom plate 301 is provided with a sliding fixed frame 601, and the side surface of the sliding fixed frame 601 is provided with a sliding motor 602. The output end of the sliding motor 602 is provided with a sliding fixed frame 601, and the output end of the sliding motor 602 is provided with a sliding fixed frame 601. A sliding threaded rod 603 is provided, and the sliding threaded rod 603 is provided on the inner side of the sliding fixed frame 601. A supporting slider 604 is provided on the outer side of the sliding threaded rod 603. The sliding threaded rod 603 is driven to rotate by a sliding motor 602. By driving the supporting slider 604 to slide on the sliding threaded rod 603, the grinding head 704 is pushed into the inner side of the steel pipe, which is convenient for grinding the steel pipe. The grinding assembly 7 includes a supporting plate 701, a grinding motor 702, an electric telescopic rod 703, a grinding head 704 and a cleaning brush 705; the top surface of the supporting slider 604 is provided with a supporting plate 701, and the side surface of the supporting plate 701 is provided with a There is a grinding motor 702, and the output of the grinding motor 702 is provided with an electric telescopic rod 703, and the other end of the electric telescopic rod 703 is provided with a grinding head 704, and a cleaning brush 705 is provided on the outside of the electric telescopic rod 703. The grinding motor 702 is used to drive the electric telescopic rod 703 to rotate, and the inner wall of the steel pipe is grinded by driving the grinding head 704 to rotate. During the grinding process, the electric telescopic rod 703 is used to push the grinding head 704 to move inside the steel pipe, so as to facilitate the grinding of different positions. The cleaning brush 705 is used to brush away the waste attached to the inner wall of the steel pipe after grinding, so as to facilitate subsequent cleaning.

[0025] During operation, the positioning pin 203 is inserted into the inner side of one end of the steel pipe, so that the steel pipe is inserted into the positioning groove 202 on the positioning seat 201, thereby positioning and limiting one end of the steel pipe to prevent the steel pipe from sliding outward, and the positioning seat 201 is pushed to move by the positioning telescopic rod 204, so as to facilitate positioning and limiting steel pipes of different lengths;

[0026] The clamping threaded rod 501 is driven to rotate by the clamping knob 502, and the two sets of threads on the clamping threaded rod 501 are used to drive the sliding clamp block 504 to slide synchronously on the clamping slide rod 503, so as to clamp and fix the steel pipe to be positioned and restricted. The friction between the sliding clamp block 504 and the steel pipe is increased by the rubber pad 505 to prevent the steel pipe from rotating during grinding, thereby avoiding affecting the grinding quality of the steel pipe.

[0027] The sliding motor 602 is used to drive the sliding threaded rod 603 to rotate, and the supporting slider 604 is driven to slide on the sliding threaded rod 603, so as to push the grinding head 704 into the inner side of the steel pipe, so as to facilitate the grinding process of the steel pipe;

[0028] The electric telescopic rod 703 is driven to rotate by the grinding motor 702, and the inner wall of the steel pipe is grinded by driving the grinding head 704 to rotate. During the grinding process, the electric telescopic rod 703 is used to push the grinding head 704 to move inside the steel pipe, so as to facilitate grinding at different positions. The cleaning brush 705 is used to brush away the waste chips attached to the inner wall of the steel pipe after grinding, so as to facilitate subsequent cleaning.

[0029] After the grinding is completed, the rotating motor 401 is used to drive the rotating shaft 402 to rotate, thereby driving the rotating frame 403 to rotate, so that the clamped steel pipe is turned around to facilitate grinding the other end of the steel pipe.

[0030] Through the above steps, the positioning component 2 is used to limit one end of the steel pipe to prevent the steel pipe from sliding outward during grinding. The support component 3 provides a stable support for the entire device to prevent the device from sliding during operation. The rotating component 4 is used to drive the clamping component 5 to rotate, so as to reverse the direction of the clamped steel pipe to facilitate grinding the other end of the steel pipe. The steel pipe is clamped and fixed by the clamping component 5 to prevent the steel pipe from rotating during grinding to avoid affecting the grinding effect. The sliding component 6 is used to drive the grinding component 7 to move, so as to facilitate driving the grinding component 7 into the steel pipe, and the inner wall of the steel pipe is ground by the grinding component 7, and the grinding position is adjusted inside the steel pipe.

[0031] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A device for grinding the inner wall of a galvanized steel pipe, comprising a galvanized steel pipe body (1); characterized in that: It also includes a positioning component (2), a supporting component (3), a rotating component (4), a clamping component (5), a sliding component (6) and a grinding component (7); a positioning component (2) is arranged at one end of the galvanized steel pipe body (1); a supporting component (3) is arranged on the bottom surface of the positioning component (2); a rotating component (4) is arranged on the top surface of the supporting component (3); a clamping component (5) is arranged on the inner side of the rotating component (4); the clamping component (5) is arranged on the outer side of the galvanized steel pipe body (1); a sliding component (6) is arranged on the top surface of the supporting component (3); a grinding component (7) is arranged on the top surface of the sliding component (6); and the grinding component (7) is arranged on the inner side of the galvanized steel pipe body (1).

2. The inner wall grinding device for galvanized steel pipe according to claim 1, characterized in that: The positioning assembly (2) comprises a positioning seat (201), a positioning groove (202), a positioning column (203), a positioning telescopic rod (204) and a positioning support plate (205); the other end of the galvanized steel pipe body (1) is provided with a positioning seat (201), a positioning groove (202) is provided on the side of the positioning seat (201), the galvanized steel pipe body (1) is arranged on the inner side of the positioning groove (202), a positioning column (203) is provided on the side of the positioning seat (201), the positioning column (203) is arranged on the inner side of the galvanized steel pipe body (1), the other side of the positioning seat (201) is provided with a positioning telescopic rod (204), the outer side of the positioning telescopic rod (204) is provided with a positioning support plate (205), and the positioning support plate (205) is fixedly connected to the positioning telescopic rod (204).

3. The inner wall grinding device for galvanized steel pipe according to claim 2, characterized in that: The support assembly (3) comprises a support base plate (301), a support column (302) and an anti-skid pad (303); the bottom surface of the positioning support plate (205) is provided with the support base plate (301), the bottom surface of the support base plate (301) is provided with support columns (302), four groups of support columns (302) are provided, and the bottom surface of the support columns (302) is provided with an anti-skid pad (303).

4. The inner wall grinding device for galvanized steel pipe according to claim 3, characterized in that: The rotating assembly (4) comprises a rotating motor (401), a rotating shaft (402) and a rotating frame (403); the rotating motor (401) is arranged on the top surface of the supporting bottom plate (301), the rotating shaft (402) is arranged at the output end of the rotating motor (401), and the rotating frame (403) is arranged on the top surface of the rotating shaft (402).

5. The inner wall grinding device for galvanized steel pipe according to claim 4, characterized in that: The clamping assembly (5) comprises a clamping threaded rod (501), a clamping knob (502), a clamping slide rod (503), a sliding clamp block (504) and a rubber pad (505); the clamping threaded rod (501) is arranged on the inner side of the rotating frame (403), the clamping threaded rod (501) is arranged on the other end of the clamping threaded rod (501), the clamping knob (502) is arranged on the inner side of the rotating frame (403), the sliding clamp block (504) is arranged on the outer side of the clamping slide rod (503), the sliding clamp block (504) is arranged on the outer side of the clamping threaded rod (501), two groups of sliding clamp blocks (504) are arranged, and the side of the sliding clamp block (504) is provided with a rubber pad (505).

6. The inner wall grinding device for galvanized steel pipe according to claim 3, characterized in that: The sliding assembly (6) comprises a sliding fixing frame (601), a sliding motor (602), a sliding threaded rod (603) and a supporting sliding block (604); the sliding fixing frame (601) is arranged on the top surface of the supporting bottom plate (301), the sliding motor (602) is arranged on the side of the sliding fixing frame (601), the sliding threaded rod (603) is arranged at the output end of the sliding motor (602), the sliding threaded rod (603) is arranged on the inner side of the sliding fixing frame (601), and the supporting sliding block (604) is arranged on the outer side of the sliding threaded rod (603).

7. The inner wall grinding device for galvanized steel pipe according to claim 6, characterized in that: The grinding assembly (7) comprises a support plate (701), a grinding motor (702), an electric telescopic rod (703), a grinding head (704) and a cleaning brush (705); the top surface of the supporting slider (604) is provided with the support plate (701), the side surface of the supporting plate (701) is provided with the grinding motor (702), the output of the grinding motor (702) is provided with the electric telescopic rod (703), the other end of the electric telescopic rod (703) is provided with the grinding head (704), and the outer side of the electric telescopic rod (703) is provided with a cleaning brush (705).

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