Spiral steel pipe welding seam polishing device

Abstract

The utility model relates to the technical field of steel pipe polishing, in particular to a spiral steel pipe welding seam polishing device which comprises a shell. The rotation driving assembly is arranged in the shell, the upper portion of the rotation driving assembly is tightly attached to the spiral steel pipe, and the rotation driving assembly is used for enabling the spiral steel pipe to rotate; the limiting assembly is arranged over the spiral steel pipe and tightly attached to the spiral steel pipe. And the inner wall grinding device is arranged in the spiral steel pipe and used for grinding the inner wall of the spiral steel pipe. The inner wall grinding device extends into the spiral steel pipe, meanwhile, the size of the inner wall grinding device is adjusted, so that the inner wall grinding device makes contact with the spiral steel pipe, the inner wall grinding device rotates in the direction opposite to the rotation driving assembly, and the inner wall of the spiral steel pipe is ground; the grinding range of the grinding roller can be adjusted according to the inner diameter of the spiral steel pipe, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe grinding technology, specifically a spiral steel pipe weld grinding device. Background Technology

[0002] Spiral steel pipe is a spiral seam steel pipe made from strip steel coil as raw material, formed by cold extrusion, and welded by automatic double-wire double-sided submerged arc welding process. After welding is completed, a weld seam will be formed on the surface of the spiral steel pipe. This requires the use of spiral steel pipe weld seam grinding equipment to grind the surface of the steel pipe, thereby improving the appearance of the steel pipe.

[0003] However, existing spiral steel pipe weld grinding devices require grinding of both the inner and outer walls of the pipe, as the welding process involves simultaneous welding from both the inside and outside. Since different steel pipes have different inner diameters, grinding rollers of the corresponding size must be used to grind the inner wall of the pipe before grinding. This makes it impossible to adjust the grinding range of the grinding rollers according to the inner diameter of the spiral steel pipe, which is inconvenient to use. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing spiral steel pipe weld grinding devices cannot adjust the grinding range of the grinding roller according to the inner diameter of the spiral steel pipe, which makes them inconvenient to use.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A spiral steel pipe weld grinding device, comprising:

[0007] case;

[0008] A rotary drive assembly is disposed inside the housing, and the upper part of the rotary drive assembly is tightly fitted with the spiral steel pipe for rotating the spiral steel pipe;

[0009] The limiting component is located directly above the spiral steel pipe and is in close contact with the spiral steel pipe;

[0010] An inner wall grinding device is installed inside the spiral steel pipe and is used to grind the inner wall of the spiral steel pipe.

[0011] An outer wall grinding device is disposed above the spiral steel pipe and located on one side of the limiting component, and is used to grind the outer wall of the spiral steel pipe.

[0012] Preferably, the inner wall polishing device includes:

[0013] The support member consists of a first plate, a second plate, and multiple sets of round rods. The multiple sets of round rods are all disposed between the first plate and the second plate and are located at the edge. The first plate and the second plate are arranged in parallel. Grooves are provided at both ends of the second plate.

[0014] The second motor, the output end of which is fixedly connected to the side of the first plate away from the second plate;

[0015] The output end of the second electric push rod is fixedly connected to the outer surface of the second motor;

[0016] A threaded rod passes through the corresponding position of the second plate and is rotatably connected to the second plate;

[0017] A knob is disposed between the first plate and the second plate, and the axis of the knob is fixedly connected to one end of the threaded rod that passes through the second plate;

[0018] A movable component is fitted onto the surface of the threaded rod and is threadedly connected to the threaded rod;

[0019] Multiple sets of connecting rods, one end of each set of connecting rods being rotatably connected to the moving part;

[0020] Two sets of connecting plates, each set of connecting plates is rotatably connected to the other end of the connecting rod on the side near the moving part; a slider is provided on the end of the connecting plate near the knob, the slider is placed in the groove, and is slidably connected to the second plate through the groove;

[0021] Multiple sets of abrasive blocks, each set of abrasive blocks being fixedly connected to the connecting plate.

[0022] Preferably, the rotary drive assembly includes:

[0023] Two sets of drive wheels are symmetrically arranged on both sides below the spiral steel pipe;

[0024] The transmission assembly consists of a belt and two sets of pulleys, with the edges of the two sets of pulleys in contact with the belt; the shafts of the two sets of pulleys are respectively fixedly connected to the shafts of the two sets of drive wheels.

[0025] A first motor, the output end of which is fixedly connected to the shaft of a set of pulleys.

[0026] Preferably, the outer wall polishing device includes:

[0027] A sanding roller is positioned above the spiral steel pipe and on the side away from the first motor;

[0028] The third motor, the output end of which is fixedly connected to the shaft of the grinding roller;

[0029] A support portion, the two ends of which are rotatably connected to the two ends of the grinding roller; a cylindrical pin is provided above the support portion;

[0030] A grooved plate, wherein a sliding groove is formed on the surface of the grooved plate, so that the cylindrical pin is placed in the sliding groove, and the grooved plate is slidably connected to the cylindrical pin through the sliding groove;

[0031] The third electric push rod, the output end of which is fixedly connected to the bottom end of the slot plate.

[0032] Preferably, the outer wall grinding device further includes: two sets of limiting rods; each set of limiting rods passes through the corresponding position of the housing and is slidably connected to the housing, and the bottom end of the limiting rod is fixedly connected to the support part.

[0033] Preferably, the limiting component includes:

[0034] The limiting wheel is positioned directly above the spiral steel pipe and is in contact with the surface of the spiral steel pipe;

[0035] The first electric push rod has its output end rotatably connected to the axis of the limiting wheel.

[0036] Preferably, it further includes: a positioning device; the positioning device is disposed inside the housing on the side close to the first motor, and is used to position the spiral steel pipe.

[0037] Preferably, the positioning device includes:

[0038] A bevel gear set, consisting of a first bevel gear and a second bevel gear, wherein the edge of the first bevel gear meshes with the second bevel gear;

[0039] The fourth motor, the output end of which is fixedly connected to the shaft of the second bevel gear;

[0040] Both sets of spur gears are coaxially arranged with the first bevel gear;

[0041] Two sets of racks, each set of racks meshing with the spur gear;

[0042] Two sets of extension components, each set of extension components being connected to the rack;

[0043] Two sets of abrasive discs, each set of abrasive discs being connected to the extension assembly.

[0044] Preferably, the surface of the rack has a through hole.

[0045] Preferably, each set of the extension components includes:

[0046] A through rod is disposed in the through hole and is slidably connected to the rack through the through hole; the surface of the through rod has multiple sets of notches;

[0047] A pin passes through the corresponding position of the rack and can extend into a set of notches.

[0048] The beneficial effects proposed by this utility model are as follows: by extending the inner wall grinding device into the spiral steel pipe and adjusting the size of the inner wall grinding device so that the inner wall grinding device contacts the spiral steel pipe and rotates in the opposite direction to the rotary drive component, the inner wall of the spiral steel pipe is ground. This allows the grinding range of the grinding roller to be adjusted according to the inner diameter of the spiral steel pipe, making it convenient to use. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of this utility model;

[0050] Figure 2 for Figure 1 Rear-view 3D schematic diagram of the central connecting structure;

[0051] Figure 3 for Figure 1 A three-dimensional sectional view of the internal connection structure.

[0052] Figure 4 for Figure 3 Rear-view 3D schematic diagram of the central connecting structure;

[0053] Figure 5 for Figure 1 Enlarged 3D schematic diagram of the central connecting structure;

[0054] Figure 6 for Figure 5 Enlarged 3D schematic diagram of the central connecting structure;

[0055] Figure 7 for Figure 4 Enlarged 3D schematic diagram of the central connecting structure;

[0056] Figure 8 for Figure 3 Enlarged 3D schematic diagram of the central connecting structure;

[0057] Figure 9 for Figure 8 Enlarged 3D schematic diagram of the connecting structure in the middle section.

[0058] In the diagram: 1. Shell, 2. Spiral steel pipe, 3. Drive wheel, 4. Transmission assembly, 5. First motor, 6. Limiting wheel, 7. First electric push rod, 8. Second electric push rod, 9. Second motor, 10. Support component, 11. Threaded rod, 12. Knob, 13. Moving component, 14. Connecting rod, 15. Connecting plate, 16. Abrasive block, 17. Abrasive roller, 18. Support part, 19. Limiting rod, 20. Groove plate, 21. Third electric push rod, 22. Third motor, 23. Bevel gear set, 24. Fourth motor, 25. Spur gear, 26. Rack, 27. Through rod, 28. Pin, 29. Abrasive disc. Detailed Implementation

[0059] The present invention will be further described below with reference to the accompanying drawings:

[0060] This embodiment:

[0061] Please see Figure 1-9 In this embodiment: a spiral steel pipe weld grinding device includes: a housing 1, a rotation drive assembly, a limiting assembly, an inner wall grinding device and an outer wall grinding device.

[0062] In this embodiment, the rotation drive assembly is disposed inside the housing 1, and the top of the rotation drive assembly is tightly fitted with the spiral steel pipe 2 to rotate the spiral steel pipe 2; the limiting assembly is disposed directly above the spiral steel pipe 2 and is tightly fitted with the spiral steel pipe 2.

[0063] In this embodiment, the rotation drive component and the limiting component work together to ensure that the spiral steel pipe 2 does not move while rotating; the rotation drive component rotates the spiral steel pipe 2 by friction.

[0064] The inner wall grinding device is installed inside the spiral steel pipe 2 and is used to grind the inner wall of the spiral steel pipe 2.

[0065] In this embodiment, by extending the inner wall grinding device into the spiral steel pipe 2 and adjusting the size of the inner wall grinding device so that the inner wall grinding device contacts the spiral steel pipe 2 and rotates the inner wall grinding device in the opposite direction to the rotation drive assembly, the inner wall of the spiral steel pipe 2 is ground. This allows the grinding range of the grinding roller to be adjusted according to the inner diameter of the spiral steel pipe, making it convenient to use.

[0066] The outer wall grinding device is located above the spiral steel pipe 2 and on one side of the limiting component, and is used to grind the outer wall of the spiral steel pipe 2.

[0067] In this embodiment, the rotation direction of the outer wall grinding device is opposite to the rotation direction of the rotary drive assembly.

[0068] like Figure 5 and Figure 6As shown, the inner wall grinding device includes: a support 10, a second motor 9, a second electric push rod 8, a threaded rod 11, a knob 12, a moving part 13, multiple sets of connecting rods 14, two sets of connecting plates 15, and multiple sets of abrasive blocks 16.

[0069] Specifically, the support member 10 consists of a first plate, a second plate, and multiple sets of round rods. The multiple sets of round rods are all arranged between the first plate and the second plate and are located at the edge. The first plate and the second plate are arranged in parallel. Grooves are provided at both ends of the second plate. The output end of the second motor 9 is fixedly connected to the side of the first plate away from the second plate. The output end of the second electric push rod 8 is fixedly connected to the outer surface of the second motor 9.

[0070] In this embodiment, the models of the second motor 9 and the second electric push rod 8 are selected according to actual needs, as long as they meet the working conditions; the output end of the second motor 9 can drive the support member 10 to rotate; and when the output end of the second electric push rod 8 extends, it can simultaneously push the second motor 9 and the support member 10 to move, so that the support member 10 can move horizontally while rotating.

[0071] The threaded rod 11 passes through the corresponding position of the second plate and is rotatably connected to the second plate; the knob 12 is located between the first plate and the second plate, and the axis of the knob 12 is fixedly connected to one end of the threaded rod 11 that passes through the second plate.

[0072] In this embodiment, the threaded rod 11 can be rotated by rotating the knob 12, and the support member 10 can support the rotation of the threaded rod 11.

[0073] The movable part 13 is sleeved on the surface of the threaded rod 11 and is threadedly connected to the threaded rod 11.

[0074] In this embodiment, when the threaded rod 11 rotates, the moving part 13 will move in the direction in which the threaded rod 11 extends.

[0075] One end of each of the multiple sets of connecting rods 14 is rotatably connected to the moving part 13; the side of each set of connecting plates 15 near the moving part 13 is rotatably connected to the other end of the connecting rod 14; a slider is provided at the end of the connecting plate 15 near the knob 12, the slider is placed in the groove, and is slidably connected to the second plate through the groove.

[0076] In this embodiment, when the movable member 13 moves, it will cause the connecting rod 14 to rotate, thereby pushing the connecting plate 15 to move towards the center or outward.

[0077] Each set of abrasive blocks 16 is fixedly connected to the connecting plate 15.

[0078] In this embodiment, the connecting plate 15 will drive the abrasive block 16 to move horizontally; the shape of the abrasive block 16 is a semi-cylindrical shape, so that the contact surface between the abrasive block 16 and the inner wall of the spiral steel pipe 2 is a line. At the same time, there is no interaction force between the abrasive block 16 and the spiral steel pipe 2, only friction. Since the friction force is limited due to the contact surface being a line, the spiral steel pipe 2 will not rotate with the abrasive block 16.

[0079] When adjustments are needed based on the dimensions of the spiral steel pipe 2, the user rotates knob 12, which drives threaded rod 11 to rotate. Threaded rod 11 causes movable part 13 to move towards the spiral steel pipe 2. Movable part 13 causes multiple sets of connecting rods 14 to rotate simultaneously, pushing two sets of connecting plates 15 to move outwards simultaneously. Connecting plates 15 drive abrasive block 16 to move. The abrasive block 16 stops after contacting the inner wall of the spiral steel pipe 2. As the spiral steel pipe 2 and abrasive block 16 rotate, the inner wall of the spiral steel pipe 2 can be polished. This allows for adjustment of the polishing range of the polishing roller according to the inner diameter of the spiral steel pipe, making it convenient to use.

[0080] like Figure 5 As shown, the rotary drive assembly includes: two sets of drive wheels 3, a transmission assembly 4, and a first motor 5.

[0081] Among them, two sets of drive wheels 3 are symmetrically arranged on both sides below the spiral steel pipe 2.

[0082] In this embodiment, the rotation of the drive wheel 3 drives the spiral steel pipe 2 to rotate. Since multiple sets of drive wheels 3 are in contact with the spiral steel pipe 2 and there is an interaction force between them, the friction between the drive wheel 3 and the spiral steel pipe 2 is much greater than the friction between the abrasive block 16 and the spiral steel pipe 2.

[0083] The transmission assembly 4 consists of a belt and two sets of pulleys, with the edges of the two sets of pulleys in contact with the belt; the shafts of the two sets of pulleys are fixedly connected to the shafts of the two sets of drive wheels 3 respectively; the output end of the first motor 5 is fixedly connected to the shaft of one set of pulleys.

[0084] In this embodiment, the model of the first motor 5 is selected according to actual needs, as long as it meets the working conditions; the two sets of pulleys rotate in the same direction, so that the drive wheels 3 on both sides rotate in the same direction, thereby further increasing the speed of the spiral steel pipe 2.

[0085] When the spiral steel pipe 2 needs to rotate, the first motor 5 is started. The output end of the first motor 5 drives a set of pulleys to rotate. This set of pulleys drives another set of pulleys to rotate in the same direction through the belt; thereby driving the drive wheels 3 on both sides to rotate in the same direction; the drive wheels 3 use the friction between themselves and the spiral steel pipe 2 to drive the spiral steel pipe 2 to rotate.

[0086] like Figure 4 and Figure 7As shown, the outer wall grinding device includes: a grinding roller 17, a third motor 22, a support part 18, a groove plate 20, and a third electric push rod 21.

[0087] Specifically, the abrasive roller 17 is positioned above the spiral steel pipe 2 and is located on the side away from the first motor 5; the output end of the third motor 22 is fixedly connected to the shaft of the abrasive roller 17.

[0088] In this embodiment, the model of the third motor 22 is selected according to actual needs, as long as it meets the working conditions;

[0089] The two ends of the support part 18 are rotatably connected to the two ends of the abrasive roller 17; a cylindrical pin is provided above the support part 18; a sliding groove is provided on the surface of the groove plate 20 so that the cylindrical pin is placed in the sliding groove, and the groove plate 20 is slidably connected to the cylindrical pin through the sliding groove; the output end of the third electric push rod 21 is fixedly connected to the bottom end of the groove plate 20.

[0090] In this embodiment, the model of the third electric push rod 21 is selected according to actual needs, as long as it meets the working conditions; when the groove plate 20 moves vertically, the support part 18 will move obliquely through the sliding between the slide groove and the cylindrical pin, thereby driving the grinding roller 17 to move.

[0091] like Figure 2 and Figure 7 As shown, the outer wall grinding device also includes: two sets of limiting rods 19; each set of limiting rods 19 passes through the corresponding position of the housing 1 and is slidably connected to the housing 1, and the bottom end of the limiting rod 19 is fixedly connected to the support part 18.

[0092] When it is necessary to grind the outer wall of the spiral steel pipe 2, the third electric push rod 21 is adjusted so that the output end of the third electric push rod 21 retracts and drives the groove plate 20 to move downward. The groove plate 20 applies a downward force to the support part 18 through the sliding between the slide groove and the cylindrical pin, so that the support part 18 is limited to the oblique downward movement by the limit rod 19. The support part 18 drives the grinding roller 17 and the third motor 22 to move. After the grinding roller 17 contacts the spiral steel pipe 2, it stops and the third motor 22 is started. The output end of the third motor 22 drives the grinding roller 17 to rotate in the opposite direction to the spiral steel pipe 2, so as to achieve the grinding of the spiral steel pipe 2.

[0093] like Figure 5 As shown, the limiting assembly includes: a limiting wheel 6 and a first electric push rod 7.

[0094] The limiting wheel 6 is positioned directly above the spiral steel pipe 2 and is in contact with the surface of the spiral steel pipe 2; the output end of the first electric push rod 7 is rotatably connected to the axis of the limiting wheel 6.

[0095] In this embodiment, the model of the first electric push rod 7 is selected according to actual needs, as long as it meets the working conditions;

[0096] By adjusting the first electric push rod 7, the output end of the first electric push rod 7 is extended, thereby pushing the limit wheel 6 to move vertically downward, so that the limit wheel 6 is in close contact with the spiral steel pipe 2, restricting the position of the spiral steel pipe 2, while not hindering the rotation of the spiral steel pipe 2.

[0097] During the grinding process, because the spiral steel pipe 2 is made by winding and welding steel coils, there are also weld points at both ends of the spiral steel pipe, and the grinding device cannot grind these points.

[0098] To address the aforementioned issues, this embodiment proposes an implementation method in which the spiral steel pipe weld grinding device further includes a positioning device. The positioning device is located inside the housing 1 on the side near the first motor 5 and is used to position the spiral steel pipe 2.

[0099] like Figure 3 and Figure 8 As shown, the positioning device includes: a bevel gear set 23, a fourth motor 24, two sets of spur gears 25, two sets of racks 26, two sets of extension components, and two sets of grinding discs 29.

[0100] Specifically, the bevel gear set 23 consists of a first bevel gear and a second bevel gear, with the edge of the first bevel gear meshing with the second bevel gear; the output end of the fourth motor 24 is fixedly connected to the shaft of the second bevel gear.

[0101] In this embodiment, the model of the fourth motor 24 is selected according to actual needs, as long as it meets the working conditions.

[0102] Both sets of spur gears 25 are coaxially arranged with the first bevel gear; each set of racks 26 is meshed with the spur gears 25;

[0103] In this embodiment, the first bevel gear can drive two sets of spur gears 25 to rotate in the same direction; while the spur gears 25 will cause the rack 26 to move horizontally.

[0104] Each set of extension components is connected to the rack 26; each set of abrasive discs 29 is connected to the extension components.

[0105] In this embodiment, the rack 26 drives the grinding disc 29 to move through the extension component, so that the grinding disc 29 contacts the welding points at both ends of the spiral steel pipe 2. As the spiral steel pipe 2 rotates, the welding points are ground.

[0106] When it is necessary to grind the weld points at both ends of the spiral steel pipe 2, the fourth motor 24 is started. The output end of the fourth motor 24 drives the bevel gear set 23 to rotate. The bevel gear set 23 causes the two sets of spur gears 25 to rotate in the same direction. The spur gears 25 cause the rack 26 to move towards the spiral steel pipe 2. The rack 26 drives the grinding disc 29 to move through the extension component, so that the grinding disc 29 contacts the weld points at both ends of the spiral steel pipe 2. As the spiral steel pipe 2 rotates, the weld points are ground.

[0107] A through hole is provided on the surface of the rack 26.

[0108] like Figure 9 As shown, each extension assembly includes: a through rod 27 and a pin 28.

[0109] The through rod 27 is disposed in the through hole and is slidably connected to the rack 26 through the through hole; multiple sets of notches are formed on the surface of the through rod 27; the pin 28 passes through the corresponding position of the rack 26 and can extend into a set of notches.

[0110] In this embodiment, the pin 28 is first pulled upward to disengage it from the notch. Then, the through rod 27 is pushed to move and stops after the abrasive disc 29 contacts the spiral steel pipe 2. At this time, the pin 28 is inserted into the corresponding notch again to extend the abrasive disc 29.

[0111] Working principle:

[0112] When using the spiral steel pipe weld grinding device, the spiral steel pipe 2 to be ground is placed between the drive wheels 3 on both sides. Then, the first electric push rod 7 is adjusted so that the output end of the first electric push rod 7 pushes the limit wheel 6 to move vertically downward, so that the limit wheel 6 is in close contact with the spiral steel pipe 2, restricting the position of the spiral steel pipe 2, while not hindering the rotation of the spiral steel pipe 2.

[0113] Subsequently, the first motor 5 is started. The output end of the first motor 5 drives a set of pulleys to rotate. This set of pulleys drives another set of pulleys to rotate in the same direction through the belt; thereby driving the drive wheels 3 on both sides to rotate in the same direction; the drive wheels 3 drive the spiral steel pipe 2 to rotate by friction between them.

[0114] Then, the user turns knob 12, which drives threaded rod 11 to rotate; threaded rod 11 causes moving part 13 to move towards spiral steel pipe 2; moving part 13 causes multiple sets of connecting rods 14 to rotate simultaneously, and pushes two sets of connecting plates 15 to move outwards simultaneously. Connecting plates 15 drive abrasive block 16 to move, and stop after abrasive block 16 contacts the inner wall of spiral steel pipe 2. With the rotation of spiral steel pipe 2 and abrasive block 16, the inner wall of spiral steel pipe 2 can be polished. The polishing range of the polishing roller can be adjusted according to the inner diameter of spiral steel pipe, which is convenient to use.

[0115] At the same time, the second motor 9 is started, so that the output end of the second motor 9 drives the entire inner wall grinding device to rotate, and the second electric push rod 8 is adjusted so that the output end of the second electric push rod 8 pushes the entire inner wall grinding device to move into the spiral steel pipe 2, thereby grinding the inner wall of the spiral steel pipe 2.

[0116] When it is necessary to grind the outer wall of the spiral steel pipe 2, the third electric push rod 21 is adjusted so that the output end of the third electric push rod 21 retracts and drives the groove plate 20 to move downward. The groove plate 20 applies a downward force to the support part 18 through the sliding between the slide groove and the cylindrical pin, so that the support part 18 is limited to the oblique downward movement by the limit rod 19. The support part 18 drives the grinding roller 17 and the third motor 22 to move. After the grinding roller 17 contacts the spiral steel pipe 2, it stops and the third motor 22 is started. The output end of the third motor 22 drives the grinding roller 17 to rotate in the opposite direction to the spiral steel pipe 2, so as to achieve the grinding of the spiral steel pipe 2.

[0117] When it is necessary to grind the weld points at both ends of the spiral steel pipe 2, the fourth motor 24 is started. The output end of the fourth motor 24 drives the bevel gear set 23 to rotate. The bevel gear set 23 causes the two sets of spur gears 25 to rotate in the same direction. The spur gears 25 cause the rack 26 to move towards the spiral steel pipe 2. The rack 26 drives the grinding disc 29 to move through the extension component, so that the grinding disc 29 contacts the weld points at both ends of the spiral steel pipe 2. As the spiral steel pipe 2 rotates, the weld points are ground, thus completing the use of this device.

[0118] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A device for grinding the weld seam of a spiral steel pipe, characterized in that: include: Shell (1); A rotary drive assembly is disposed inside the housing (1), and the top of the rotary drive assembly is closely fitted with the spiral steel pipe (2) for rotating the spiral steel pipe (2); The limiting component is located directly above the spiral steel pipe (2) and is in close contact with the spiral steel pipe (2); An inner wall grinding device is installed inside the spiral steel pipe (2) and is used to grind the inner wall of the spiral steel pipe (2). An outer wall grinding device is disposed above the spiral steel pipe (2) and located on one side of the limiting component, for grinding the outer wall of the spiral steel pipe (2).

2. The spiral steel pipe weld grinding device according to claim 1, characterized in that: The inner wall polishing device includes: The support member (10) consists of a first plate, a second plate and multiple sets of round rods. The multiple sets of round rods are all disposed between the first plate and the second plate and are located at the edge. The first plate and the second plate are arranged in parallel. The two ends of the second plate are provided with grooves. The output end of the second motor (9) is fixedly connected to the side of the first plate away from the second plate; The output end of the second electric push rod (8) is fixedly connected to the outer surface of the second motor (9); A threaded rod (11) passes through the corresponding position of the second plate and is rotatably connected to the second plate; A knob (12) is disposed between the first plate and the second plate, and the axis of the knob (12) is fixedly connected to one end of the threaded rod (11) that passes through the second plate; The movable part (13) is sleeved on the surface of the threaded rod (11) and threadedly connected to the threaded rod (11); Multiple sets of connecting rods (14), one end of each set of connecting rods (14) is rotatably connected to the moving part (13); Two sets of connecting plates (15), each set of connecting plates (15) is rotatably connected to the other end of the connecting rod (14) on the side near the moving part (13); a slider is provided on the end of the connecting plate (15) near the knob (12), the slider is placed in the groove, and is slidably connected to the second plate through the groove; Multiple sets of abrasive blocks (16), each set of abrasive blocks (16) is fixedly connected to the connecting plate (15).

3. The spiral steel pipe weld grinding device according to claim 1, characterized in that: The rotation drive assembly includes: Two sets of drive wheels (3) are symmetrically arranged on both sides below the spiral steel pipe (2); The transmission assembly (4) consists of a belt and two sets of pulleys, with the edges of the two sets of pulleys in contact with the belt; the shafts of the two sets of pulleys are respectively fixedly connected to the shafts of the two sets of drive wheels (3); The first motor (5) is fixedly connected to the shaft of a set of pulleys at its output end.

4. The spiral steel pipe weld grinding device according to claim 3, characterized in that: The outer wall polishing device includes: A sanding roller (17) is disposed above the spiral steel pipe (2) and located on the side away from the first motor (5); The third motor (22) is fixedly connected to the shaft of the grinding roller (17) at its output end. A support part (18) is provided, the two ends of which are rotatably connected to the two ends of the abrasive roller (17); a cylindrical pin is provided above the support part (18); The groove plate (20) has a sliding groove on its surface, so that the cylindrical pin is placed in the sliding groove, and the groove plate (20) is slidably connected to the cylindrical pin through the sliding groove; The third electric push rod (21) is fixedly connected to the bottom end of the slot plate (20) at its output end.

5. The spiral steel pipe weld grinding device according to claim 4, characterized in that: The outer wall grinding device further includes: two sets of limiting rods (19); each set of limiting rods (19) passes through the corresponding position of the housing (1) and is slidably connected to the housing (1), and the bottom end of the limiting rod (19) is fixedly connected to the support part (18).

6. The spiral steel pipe weld grinding device according to claim 1, characterized in that: The limiting component includes: The limiting wheel (6) is located directly above the spiral steel pipe (2) and is in contact with the surface of the spiral steel pipe (2); The first electric push rod (7) has its output end rotatably connected to the axis of the limiting wheel (6).

7. The spiral steel pipe weld grinding device according to claim 3, characterized in that: Also includes: Positioning device; the positioning device is located inside the housing (1) on the side close to the first motor (5) and is used to position the spiral steel pipe (2).

8. The spiral steel pipe weld grinding device according to claim 7, characterized in that: The positioning device includes: The bevel gear set (23) consists of a first bevel gear and a second bevel gear, wherein the edge of the first bevel gear meshes with the second bevel gear; The fourth motor (24) is fixedly connected to the shaft of the second bevel gear at its output end; Both sets of spur gears (25) are coaxially arranged with the first bevel gear; Two sets of racks (26), each set of racks (26) meshing with the spur gear (25); Two sets of extension components, each set of extension components being connected to the rack (26); Two sets of abrasive discs (29), each set of abrasive discs (29) is connected to the extension assembly.

9. The spiral steel pipe weld grinding device according to claim 8, characterized in that: The surface of the rack (26) is provided with a through hole.

10. The spiral steel pipe weld grinding device according to claim 9, characterized in that: Each set of the extended components includes: A through rod (27) is disposed in the through hole and is slidably connected to the rack (26) through the through hole; multiple sets of notches are formed on the surface of the through rod (27); A pin (28) passes through the corresponding position of the rack (26) and can extend into a set of notches.

Images