Automatic grinding equipment for welding seam of spiral steel pipe and using method of automatic grinding equipment

Abstract

The invention discloses automatic grinding equipment for a welding seam of a spiral steel pipe and a using method of the automatic grinding equipment. The automatic grinding equipment comprises a welding skin cleaning mechanism and a grinding mechanism, the welding skin cleaning mechanism comprises a cleaning shovel installed on a welding skin cleaning support, and the cleaning shovel is tightly attached to the wall face of the spiral steel pipe; the weld joint coping mechanism comprises a belt sander, a weld joint reinforcement adjusting structure and a tensioning wheel adjusting structure, and the belt sander is installed on the movable platform; the waste collecting mechanism comprises a baffle and a conveying plate, the baffle is vertically arranged, and the conveying plate is obliquely arranged; the welding seam coping mechanism is located under the spiral steel pipe, the welding skin cleaning mechanism is arranged in front of the welding seam coping mechanism, and the waste collecting mechanism is arranged behind the welding seam coping mechanism; the weld reinforcement can be automatically ground and controlled, grinding is fast, operation is easy, the weld reinforcement can be immediately used and stopped along with the production rhythm, manual intervention is not needed in the process, normal production is guaranteed, and meanwhile the labor cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of weld grinding, and in particular to automatic weld grinding equipment for spiral steel pipes and a use method thereof. Background Art

[0002] Spiral seam submerged arc welded anti-corrosion steel pipe is a kind of pipe with good anti-corrosion performance, which is widely used in infrastructure construction and oil and gas transportation, water supply and drainage, urban central heating, oil and gas long-distance pipelines, etc. The outer weld height of spiral steel pipe with thick wall is about 3.0-3.5mm, and the weld cannot meet the anti-corrosion requirements without treatment.

[0003] At present, the spiral seam submerged arc welding anti-corrosion steel pipe production line often uses milling to indirectly control the height of the weld to meet the subsequent steel pipe anti-corrosion requirements. This indirect control of the weld height by double-sided milling greatly increases the waste of labor, electricity, milling blades and raw materials, has high costs and unstable effects. In the prior art, there is also a belt grinder for weld grinding. Since the tensioning wheel of the belt grinder mainly uses a bolt sleeve to squeeze the clamping piece to complete the fixation of the tensioning wheel, the machine is prone to vibration during work, and the installation of the bolt sleeve and the threaded shaft is easy to loosen, which leads to the clamping piece being unable to complete the extrusion and fixation of the tensioning wheel, which is easy to cause the sanding belt to suddenly lose its tension during the operation of the belt grinder; at the same time, the weld skin on the surface of the spiral steel pipe causes the height of the weld burr to be different, which in turn causes the height of the weld height after grinding to be different, and there is a situation where the weld height is ground to the parent material. Therefore, the prior art has the problem that the weld height cannot be controlled, resulting in poor weld grinding effect of the spiral steel pipe. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides an automatic grinding device for a spiral steel pipe weld and a method for using the device, which can control the weld excess height and improve the weld grinding quality.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect of the present invention, there is provided an automatic grinding device for spiral steel pipe welds, characterized in that it comprises:

[0007] The weld skin cleaning mechanism comprises a cleaning shovel mounted on a weld skin cleaning bracket, wherein the cleaning shovel is in close contact with the wall surface of the spiral steel pipe;

[0008] The weld grinding mechanism comprises a belt grinder, a weld excess height adjustment structure and a tension wheel adjustment structure, wherein the belt grinder is mounted on a mobile platform, the weld excess height adjustment structure is used to adjust the weld excess height, and the tension wheel adjustment structure is used to adjust the tension of the belt grinder;

[0009] The waste collection mechanism comprises a baffle and a conveying plate, wherein the baffle is arranged vertically and the conveying plate is arranged obliquely;

[0010] The weld seam grinding mechanism is located directly below the spiral steel pipe, the weld skin cleaning mechanism is arranged in front of the weld seam grinding mechanism, and the waste collecting mechanism is arranged behind the weld seam grinding mechanism.

[0011] In some embodiments of the present invention, the belt sander includes a driving wheel, a driven wheel and a tensioning wheel, the driving wheel is connected to the output shaft of the motor, the driven wheel is installed on the side panel, the tensioning wheel is installed on the tensioning wheel adjustment structure, and the driving wheel, the driven wheel and the tensioning wheel are connected by a sanding belt.

[0012] In some embodiments of the present invention, the weld excess height adjustment structure is installed on the side plate, and the weld excess height adjustment structure includes a plate and a guide wheel. The guide wheel is rotatably installed on one end of the plate, and a long hole is set at the other end of the plate. The bolt passes through the long hole and the side plate and is fixed by a nut.

[0013] In some embodiments of the present invention, the tensioning wheel adjustment structure is installed on a support plate, and the tensioning wheel adjustment structure includes a bolt, a rotating plate and a connecting rod, one end of the bolt is fixedly connected to the support plate, one end of the rotating plate is rotatably connected to the support plate, the other end of the rotating plate is fixedly connected to the connecting rod, the rotating plate and the connecting rod are vertically arranged, and the tensioning wheel is installed on the connecting rod.

[0014] In some embodiments of the present invention, the bolt is arranged parallel to the rotating plate and connected through a lifting ring. The round hole sleeve of the lifting ring is arranged on the bolt. The bottom of the lifting ring is fixedly connected to the rotating plate. A nut is installed on the bolt. The lifting ring is pushed to move by rotating the nut, thereby driving the rotating plate and the connecting rod to rotate.

[0015] In some embodiments of the present invention, the belt sander is mounted on a support plate, which includes a first plate member and a second plate member that are perpendicular to each other, wherein the first plate member is vertically arranged and the second plate member is horizontally arranged; the bottom of the first plate member is rotatably connected to the mobile platform, and the side of the first plate member is connected to the mobile platform through a spring and a cylinder.

[0016] In some embodiments of the present invention, the weld skin cleaning mechanism, weld seam grinding mechanism and waste collection mechanism are arranged on a stand, and the mobile platform includes an X-axis mobile platform and a Y-axis mobile platform. The X-axis mobile platform is installed on the stand through an X-axis slide rail, and the Y-axis mobile platform is installed on the X-axis mobile platform through a Y-axis slide rail.

[0017] In some embodiments of the present invention, the cleaning shovel is installed on a weld skin cleaning bracket, and the weld skin cleaning bracket includes a bottom bracket and a support rod, the support rod is rotatably connected to the top of the bottom bracket, one end of the support rod is fixedly installed with the cleaning shovel, and the other end is connected to a counterweight block through a pull rope.

[0018] In some embodiments of the present invention, the baffle is vertically mounted on the conveying plate, and a groove is provided at the bottom of the baffle.

[0019] In a second aspect of the present invention, a method for using a spiral steel pipe weld automatic grinding device is provided, comprising the following steps:

[0020] The position of the mobile platform is adjusted to adjust the driven wheel of the belt grinder to the weld position of the spiral steel pipe to be ground, and then the weld excess height is controlled by adjusting the relative displacement difference between the guide wheel and the abrasive belt of the weld excess height adjustment structure, and the tension of the abrasive belt is adjusted by the tensioning wheel adjustment structure; the weld grinding quality is improved by controlling the weld excess height and adjusting the tension of the abrasive belt;

[0021] During the grinding process, the spiral steel pipe rotates, the weld skin cleaning mechanism cleans the weld skin at the weld position of the spiral steel pipe to be ground, the weld grinding mechanism grinds the weld, and the debris generated by the grinding is collected through the conveyor plate.

[0022] One or more technical solutions of the present invention have the following beneficial effects:

[0023] (1) The automatic grinding equipment for spiral steel pipe welds provided by the present invention cleans the weld skin at the spiral steel pipe welds through a weld skin cleaning mechanism, grinds the welds through a weld grinding mechanism, and collects debris generated during the grinding process through a waste collection mechanism. At the same time, the cleaning of the weld skin cleaning mechanism, the adjustment of the guide wheel, the adjustment of the cylinder, the adjustment of the tension wheel, and the moving platform work together to achieve precise control of the weld excess height, thereby improving the grinding effect.

[0024] (2) The entire grinding device of the present invention is easy to operate under the control of the controller, and realizes automatic grinding to control the weld excess height. The grinding is fast and easy to operate, and it can be stopped and used according to the production rhythm. The process does not require human intervention, ensuring normal production while saving labor costs.

[0025] (3) The present invention controls the weld excess height by setting up a weld excess height adjustment structure, which will not have too much impact on the raw materials, avoid the waste of raw materials caused by heavy milling, and at the same time is suitable for the weld grinding excess height control work of steel pipes with different diameters; during the grinding process, the belt sander is turned on and the cylinder is started to drive the support plate to rotate, the driven wheel slowly contacts the weld surface and starts grinding until the guide wheel contacts the spiral steel pipe, the rotation stops, and the grinding work enters a normal working state; the weld excess height adjustment structure cooperates with the cylinder to control the weld excess height while adjusting the fit between the sanding belt and the weld, completing the weld grinding process, and ensuring the weld grinding quality.

[0026] (4) The automatic control device for weld excess height of the present invention embodies the systematic nature of the equipment, which includes not only a sanding machine, i.e., the weld grinding part, but also a front-end weld skin cleaning mechanism and a rear-end waste collection structure, thereby ensuring that the weld grinding excess height control work is carried out efficiently and orderly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional diagram of the automatic grinding device for spiral steel pipe welds of the present invention;

[0028] Figure 2 It is a front view of the automatic grinding device for spiral steel pipe weld of the present invention;

[0029] Figure 3 It is a left view of the automatic grinding device for spiral steel pipe weld of the present invention;

[0030] Figure 4 It is a partially enlarged schematic diagram of the grinding mechanism of the automatic grinding equipment for spiral steel pipe welds of the present invention.

[0031] In the figure: 1. weld skin cleaning bracket; 101. support rod; 102. bottom bracket; 2. weld skin collecting and conveying platform; 3. stand; 4. X-axis moving platform; 5. Y-axis moving platform; 6. weld grinding mechanism; 7. weld residual height adjustment structure; 701. guide wheel; 702. plate; 703. first nut; 704. first bolt; 8. tensioning wheel adjustment structure; 801. lifting ring; 802. rotating seat; 803. second nut; 804. rotating plate; 805. connecting rod; 9. spring and cylinder; 10. conveying plate; 11. baffle; 12. counterweight; 13. support plate; 14. driving wheel; 15. driven wheel; 16. tensioning wheel; 17. second bolt; 18. side plate. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Example 1

[0034] In a typical embodiment of the present invention, a spiral steel pipe weld automatic grinding device is provided, such as Figure 1-4 As shown, including:

[0035] The weld skin cleaning mechanism comprises a cleaning shovel mounted on the weld skin cleaning bracket 1, wherein the cleaning shovel is in close contact with the wall surface of the spiral steel pipe;

[0036] The weld grinding mechanism 6 comprises a belt sander, a weld excess height adjustment structure 7 and a tension wheel adjustment structure 8, wherein the belt sander is mounted on a mobile platform, the weld excess height adjustment structure 7 is used to adjust the weld excess height, and the tension wheel adjustment structure is used to adjust the tension of the sanding belt 8;

[0037] The waste collection mechanism comprises a baffle 11 and a conveying plate 10, wherein the baffle 11 is arranged vertically and the conveying plate 10 is arranged obliquely;

[0038] The weld grinding mechanism is located directly below the spiral steel pipe, the weld skin cleaning mechanism is arranged in front of the weld grinding mechanism, and the waste collection mechanism is arranged behind the weld grinding mechanism. When grinding the weld position on the spiral steel pipe, the weld skin at the weld position is firstly removed by the weld skin cleaning mechanism, and then the weld position is ground by the weld grinding mechanism. The cleaned weld skin is collected by the weld skin collection and conveying table, and the debris generated during the grinding process is collected by the waste collection mechanism.

[0039] In this embodiment, the belt sander includes a driving wheel 14, a driven wheel 15 and a tensioning wheel 16, wherein the driving wheel 14 is connected to the output shaft of the motor, the driven wheel 15 is mounted on the side plate 18, and the tensioning wheel 16 is mounted on the tensioning wheel adjustment structure 8, and the driving wheel 14, the driven wheel 15 and the tensioning wheel 16 are connected by a sanding belt. The driving wheel 14 is connected to the motor and is on the same horizontal axis, the motor is fixed on the support plate 13, and the motor drives the driving wheel 14 to rotate; the side plate 18 is connected to the support plate 13 and is rotatably connected to the driven wheel 15, and the driving wheel rotates to drive the driven wheel to rotate through the sanding belt, and the sanding belt at the driven wheel grinds the weld position of the spiral steel pipe during the rotation process.

[0040] In this embodiment, the weld excess height adjustment structure 7 is installed on the side plate 18, and the weld excess height adjustment structure includes a plate 702 and a guide wheel 701. The guide wheel 701 is rotatably installed at one end of the plate 702, and the other end of the plate 702 is provided with a long hole, and the first bolt 704 passes through the long hole and is fixed to the side plate 18 by a first nut 703. By adjusting the position of the first bolt 704 in the long hole, the height of the guide wheel 701 above the sand belt at the driven wheel can be adjusted. The guide wheel is always in contact with the spiral steel pipe, and the relative displacement of the guide wheel and the sand belt at the driven wheel is the height of the weld after grinding. For example, if the weld excess height needs to be controlled to 0.5mm, the height of the guide wheel is adjusted so that the guide wheel is 0.5mm higher than the upper surface of the sand belt at the driven wheel. In this way, when grinding, when the weld excess height is ground to 0.5mm, due to the limiting effect of the guide wheel, the sand belt cannot continue to grind to the weld, thereby achieving a weld excess height of 0.5mm.

[0041] In this embodiment, the tension wheel adjustment structure 8 is installed on the support plate 13, and the tension wheel adjustment structure 8 includes a second bolt 17, a rotating plate 804 and a connecting rod 805. One end of the second bolt 17 is fixedly connected to the support plate 13, one end of the rotating plate 804 is rotatably connected to the support plate 13 through a rotating seat 802, and the other end of the rotating plate 804 is fixedly connected to the connecting rod 805. The rotating plate 804 and the connecting rod 805 are vertically arranged, and the tension wheel 16 is rotatably installed on the connecting rod 805. The second bolt 17 is arranged in parallel with the rotating plate 804 and connected through a lifting ring 801. The round hole sleeve of the lifting ring 801 is arranged on the second bolt 17, and the lifting ring 801 can slide on the second bolt 17. The bottom of the lifting ring 801 is fixedly connected to the rotating plate 804. The second bolt 17 is equipped with a second nut 803. The lifting ring 801 is pushed to move by rotating the second nut 803, thereby driving the rotating plate 804 and the connecting rod 805 to rotate. The working principle of the tensioning wheel adjustment structure 8 is: when the second nut 803 is rotated to move the second nut to the right, the second nut pushes the lifting ring to the right. During the movement of the lifting ring to the right, a vertical upward component force will be generated, which can pull the rotating plate 804 to move upward, and then drive the connecting rod and the tensioning wheel on the connecting rod to move upward. Rotating upward is a tensioned state, and rotating downward is a relaxed state. The tensioning wheel adjustment mechanism is simple and easy to operate.

[0042] In this embodiment, the belt sander is mounted on a support plate 13, and the belt sander is mounted on a support plate 13, and the support plate 13 includes a first plate and a second plate that are perpendicular to each other, wherein the first plate is vertically arranged and the second plate is horizontally arranged; the bottom of the first plate is rotatably connected to the mobile platform, and the side of the first plate is connected to the mobile platform through a spring and a cylinder 9. In this embodiment, a spring is arranged on each side of the cylinder, one end of the spring is connected to the first plate, and the other end is connected to the X-axis mobile platform. The fit between the sand belt at the driven wheel and the weld is adjusted by the action of the cylinder, and the spring plays a role of stabilization and reset. For example, the piston of the cylinder extends out of the first plate of the support plate and tilts to the right, thereby driving the driven wheel installed on the support plate to move to the right, and the fit between the sand belt at the driven wheel and the weld becomes tighter. When the piston of the cylinder contracts, the piston of the cylinder extends out of the first plate of the support plate and tilts to the left, thereby driving the driven wheel installed on the support plate to move to the left, and the fit between the sand belt at the driven wheel and the weld becomes smaller, which can be adjusted as needed to ensure the weld grinding effect.

[0043] In this embodiment, the weld skin cleaning mechanism, weld seam grinding mechanism and waste collection mechanism are arranged on the stand 3, and the mobile platform includes an X-direction mobile platform 4 and a Y-direction mobile platform 5. The X-direction mobile platform 4 is installed on the stand 3 through an X-direction slide rail, and the Y-direction mobile platform 5 is installed on the X-direction mobile platform 4 through a Y-direction slide rail. Through the mobile platform, the position of the belt sander can be flexibly adjusted according to the position of the weld.

[0044] In this embodiment, the cleaning shovel is installed on the weld skin cleaning bracket 1, and the weld skin cleaning bracket 1 includes a bottom bracket 102 and a support rod 101, and the support rod 101 is rotatably connected to the top of the bottom bracket 102. The cleaning shovel is fixedly installed on one end of the support rod, and the other end is connected to the counterweight block 12 through a pull rope. Under the gravity of the counterweight block, the cleaning shovel is always in close contact with the weld position of the spiral steel pipe. The spiral steel pipe rotates, and the cleaning of the weld skin at the weld position is achieved through the cleaning shovel. A weld skin collection and conveying platform 2 is set below the cleaning shovel. The bottom bracket is installed on the platform 3, and the support rod is rotatably connected to the top of the bottom bracket. The cleaning shovel contacts the steel pipe weld, and the contact force is controlled by the counterweight block 12 to play a role in cleaning the weld skin; the cleaned weld skin enters the weld skin collection and conveying platform 2 and is conveyed to the waste chip collection trolley.

[0045] In this embodiment, the baffle 11 is vertically installed on the conveying plate 10. A groove is provided at the bottom of the baffle 11. The debris generated during the grinding process slides off the conveying plate 10, and the baffle 11 can prevent the debris from splashing.

[0046] The cylinder and the weld excess height adjustment structure form a limiting mechanism, which is used to control the weld excess height and ensure the grinding effect; the cylinder is connected to the sanding machine and the X-axis moving platform 4, and is assisted by springs on both sides to control the movement of the sanding machine head along the arc direction to ensure the grinding effect, and the grinding pressure barometer value is preferably 0.3-0.4MPa; the guide wheel part is installed on the side plate of the sanding machine, and the vertical distance between the guide wheel and the sanding belt grinding position is adjusted according to requirements to ensure the grinding amount of the weld, which is used to control the excess height of the weld after the sanding machine is ground. The cylinder adjusts the horizontal distance between the guide wheel and the sanding belt grinding position to control the fit between the sanding belt and the weld.

[0047] In this embodiment, the weld skin cleaning mechanism, weld seam grinding mechanism and waste collection mechanism are arranged on the stand, the X-direction moving platform is installed on the stand through the X-direction slide rail, and the Y-direction moving platform is installed on the X-direction moving platform through the Y-direction slide rail. The upper structure is driven to move along the Y-axis direction by the Y-direction slide rail, and the moving distance is determined according to the weld position. The upper structure is driven to move along the X-axis direction by the X-direction slide roller. The structure for realizing the movement of the X-direction moving platform and the Y-direction moving platform is not limited to the above structure, and is an existing structure. For example, a lead screw and a motor can also be used to realize the movement of the X-direction moving platform and the Y-direction moving platform.

[0048] The automatic grinding equipment for spiral steel pipe welds also includes a controller, which is the "brain" of the entire equipment, including controlling the movement of the Y-axis moving platform, the X-axis moving platform, and the cylinder part of the limit mechanism. It is preferably connected to the control console of the steel pipe production unit or installed next to the control console of the production unit to facilitate the consistency of the status of the belt sander and the unit production.

[0049] The working principle of the automatic grinding device for spiral steel pipe weld provided in this embodiment is as follows:

[0050] The cleaning shovel of the weld skin cleaning mechanism always keeps in contact with the wall surface of the spiral steel pipe under the action of the counterweight block. When the spiral steel pipe rotates, the cleaning shovel removes the weld skin on the surface of the weld. Then, the position of the limit wheel and the tension wheel is adjusted as needed, and the movement of the X-axis moving platform and the Y-axis moving platform is controlled to make the sanding machine located at the weld position. Then, the weld excess height is controlled by adjusting the relative displacement difference between the guide wheel and the sanding belt of the weld excess height adjustment structure. At the same time, the tension of the sanding belt is adjusted by the tension wheel adjustment structure, and the fit between the sanding belt and the weld is adjusted by the cylinder. The weld grinding quality is improved by controlling the weld excess height and adjusting the tension of the sanding belt. The controller controls the sanding time of the sanding machine and proceeds with the production rhythm. After the grinding is completed, the controller controls the limit mechanism to rotate and descend by controlling the cylinder, and then controls the conveying mechanism to continue to operate.

[0051] During the grinding process, the scraped weld skin falls onto the weld skin collection and conveying table. The iron filings generated by the belt grinding machine grinding the steel pipe are blocked by the baffle and fall onto the conveying plate for collection.

[0052] Example 2

[0053] In a typical embodiment of the present invention, a method for using a spiral steel pipe weld automatic grinding device is provided, comprising the steps of:

[0054] The position of the mobile platform is adjusted to adjust the driven wheel of the belt grinder to the weld position of the spiral steel pipe to be ground, and then the weld excess height is controlled by adjusting the relative displacement difference between the guide wheel and the abrasive belt of the weld excess height adjustment structure, and the tension of the abrasive belt is adjusted by the tensioning wheel adjustment structure; the weld grinding quality is improved by controlling the weld excess height and adjusting the tension of the abrasive belt;

[0055] During the grinding process, the spiral steel pipe rotates, the weld skin cleaning mechanism cleans the weld skin at the weld position of the spiral steel pipe to be ground, the weld grinding mechanism grinds the weld, and the debris generated by the grinding is collected through the conveyor plate.

[0056] Preferably, the relative displacement difference between the guide wheel and the abrasive belt of the weld height adjustment structure is the weld height after grinding, preferably 0-0.5 mm, to avoid grinding to the base material due to the existence of misalignment as much as possible.

[0057] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. An automatic grinding device for spiral steel pipe welds, characterized in that: include: The weld skin cleaning mechanism comprises a cleaning shovel mounted on a weld skin cleaning bracket, wherein the cleaning shovel is in close contact with the wall surface of the spiral steel pipe; The weld grinding mechanism comprises a belt grinder, a weld excess height adjustment structure and a tension wheel adjustment structure, wherein the belt grinder is mounted on a mobile platform, the weld excess height adjustment structure is used to adjust the weld excess height, and the tension wheel adjustment structure is used to adjust the tension of the belt grinder; The waste collection mechanism comprises a baffle and a conveying plate, wherein the baffle is arranged vertically and the conveying plate is arranged obliquely; The weld seam grinding mechanism is located directly below the spiral steel pipe, the weld skin cleaning mechanism is arranged in front of the weld seam grinding mechanism, and the waste collecting mechanism is arranged behind the weld seam grinding mechanism.

2. The automatic grinding equipment for spiral steel pipe welds according to claim 1, characterized in that: The belt sander includes a driving wheel, a driven wheel and a tensioning wheel, wherein the driving wheel is connected to the output shaft of the motor, the driven wheel is mounted on the side plate, and the tensioning wheel is mounted on the tensioning wheel adjustment structure, and the driving wheel, the driven wheel and the tensioning wheel are connected through a sanding belt.

3. The automatic grinding equipment for spiral steel pipe welds according to claim 2, characterized in that: The weld excess height adjustment structure is installed on the side plate, and the weld excess height adjustment structure includes a plate and a guide wheel. The guide wheel is rotatably installed on one end of the plate, and a long hole is arranged on the other end of the plate. The bolt passes through the long hole and the side plate and is fixed by a nut.

4. The automatic grinding equipment for spiral steel pipe welds according to claim 2, characterized in that: The tensioning wheel adjustment structure is installed on the support plate, and the tensioning wheel adjustment structure includes a bolt, a rotating plate and a connecting rod. One end of the bolt is fixedly connected to the support plate, one end of the rotating plate is rotatably connected to the support plate, and the other end of the rotating plate is fixedly connected to the connecting rod. The rotating plate and the connecting rod are vertically arranged, and the tensioning wheel is rotatably installed on the connecting rod.

5. The automatic grinding equipment for spiral steel pipe welds according to claim 4, characterized in that: The bolt is arranged parallel to the rotating plate and is connected through a lifting ring. The round hole sleeve of the lifting ring is arranged on the bolt. The bottom of the lifting ring is fixedly connected to the rotating plate. A nut is installed on the bolt. The lifting ring is pushed to move by rotating the nut, thereby driving the rotating plate and the connecting rod to rotate.

6. The automatic grinding equipment for spiral steel pipe welds according to claim 4, characterized in that: The belt sander is mounted on a support plate, which includes a first plate member and a second plate member that are perpendicular to each other, wherein the first plate member is vertically arranged and the second plate member is horizontally arranged; the bottom of the first plate member is rotatably connected to the moving platform, and the side of the first plate member is connected to the moving platform through a spring and a cylinder.

7. The automatic grinding equipment for spiral steel pipe welds according to claim 1, characterized in that: The weld skin cleaning mechanism, weld seam grinding mechanism and waste collection mechanism are arranged on a stand, and the mobile platform includes an X-direction mobile platform and a Y-direction mobile platform. The X-direction mobile platform is installed on the stand through an X-direction slide rail, and the Y-direction mobile platform is installed on the X-direction mobile platform through a Y-direction slide rail.

8. The automatic grinding equipment for spiral steel pipe welds according to claim 1, characterized in that: The cleaning shovel is installed on a weld skin cleaning bracket, which includes a bottom bracket and a support rod. The support rod is rotatably connected to the top of the bottom bracket, one end of the support rod is fixedly installed with the cleaning shovel, and the other end is connected to a counterweight block through a pull rope.

9. The automatic grinding equipment for spiral steel pipe welds according to claim 1, characterized in that: The baffle is vertically installed on the conveying plate, and a groove is arranged at the bottom of the baffle.

10. A method for using the automatic grinding device for spiral steel pipe welds according to any one of claims 1 to 9, characterized in that: include: The position of the mobile platform is adjusted to adjust the driven wheel of the belt grinder to the weld position of the spiral steel pipe to be ground, and then the weld excess height is controlled by adjusting the relative displacement difference between the guide wheel and the abrasive belt of the weld excess height adjustment structure, and the tension of the abrasive belt is adjusted by the tensioning wheel adjustment structure; the weld grinding quality is improved by controlling the weld excess height and adjusting the tension of the abrasive belt; During the grinding process, the spiral steel pipe rotates, the weld skin cleaning mechanism cleans the weld skin at the weld position of the spiral steel pipe to be ground, the weld grinding mechanism grinds the weld, and the debris generated by the grinding is collected through the conveyor plate.

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