Pipeline abrasion cutting device

Abstract

The utility model provides a pipeline abrasion cutting device. The pipeline abrasion cutting device comprises a base, a positioning piece and two sets of limiting pieces. Two supporting rollers are arranged on the base, and a support is arranged on the outer side of the base. The positioning piece is connected to the support in a sliding mode in the vertical direction and located above the base. The positioning piece is in transmission connection with a lifting driving component, and a grinding wheel disc rotationally connected with the positioning piece is arranged at the lower end and further in transmission connection with a rotation driving component. The two limiting pieces are arranged on the two sides, facing the axial direction of the grinding wheel disc, of the positioning piece correspondingly and used for abutting against the two sides of the pipeline segmentation position correspondingly so as to limit the two pipe joints on the two segmentation sides to do horizontal movement. On the basis, the pipeline can rotate with the central axis of the pipeline as the axis in the mode of rotating the supporting rollers, so that the pipeline is segmented. According to the pipeline grinding and cutting device, the pipe joints on the two sides of the pipeline cutting position can be fixed, so that the dislocation phenomenon in the pipeline grinding and cutting process is prevented, and the finished product effect of pipeline grinding and cutting is guaranteed.

Description

Technical Field

[0001] This application belongs to the field of pipeline laying technology, specifically relating to a pipeline grinding and cutting device. Background Technology

[0002] Pipeline laying refers to the process of laying a pipeline system to a designated location, primarily used for transporting liquids, gases, or semi-solid substances. During pipeline laying, there are instances where the pipeline length does not match the design length, necessitating on-site cutting and welding.

[0003] Existing pipe cutting is mainly achieved through abrasive wheel cutting machines. Specifically: the operator places the pipe on the machine body, aligning the pipe's cutting position with the movement trajectory of the abrasive wheel; then, the operator manually controls the position of the abrasive wheel, making its outer edge contact the outer wall of the pipe; next, the machine is started, causing the abrasive wheel to rotate and generate friction between it and the pipe, while simultaneously pressing down on the abrasive wheel to gradually penetrate deeper into the pipe to cut it; finally, the pipe is rotated to increase the cutting range in a ring shape, thus severing the pipe.

[0004] The inventors discovered that during the grinding process of pipes, pipe misalignment can occur. That is, the cut pipe tilts under pressure, causing the original circular cutting path to deviate, resulting in an uneven pipe end face after grinding and reducing the finished product quality of the pipe grinding. Utility Model Content

[0005] This application provides a pipe grinding and cutting device, which aims to fix the pipe sections on both sides of the pipe cutting position, prevent misalignment during the pipe grinding and cutting process, and ensure the finished product effect of the pipe grinding and cutting.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] A pipe grinding and cutting apparatus is provided, comprising:

[0008] A base is provided with two parallel support rollers, each of which is rotatably connected to the base to support the pipe and drive it to rotate; a bracket is provided on the outside of the base, and part of the bracket is located above the base.

[0009] A positioning element is slidably mounted on the bracket in the vertical direction and is driven by a lifting drive component. The lower end of the positioning element has a grinding wheel rotatably connected to it, and a rotation drive component is driven by the grinding wheel. The rotation axis of the grinding wheel is parallel to the axis of the support roller, so that the outer edge of the grinding wheel can contact the upper outer wall of the pipe.

[0010] Two sets of limiting members are respectively disposed on both sides of the positioning member facing the axial direction of the grinding wheel, and are used to abut against both sides of the pipe cutting position.

[0011] In one possible implementation, the limiting member includes:

[0012] A fixing plate is disposed on the positioning member and is located on one side of the positioning member facing the axial direction of the grinding wheel; and

[0013] Two alignment plates are arranged side by side on the fixed plate in a horizontal direction, and their arrangement direction is perpendicular to the axis of the grinding wheel.

[0014] Each of the alignment plates is slidably connected to the fixing plate in the vertical direction; the fixing plate is provided with an adjusting member connected to the two alignment plates, the adjusting member being used to drive the two alignment plates to move in the vertical direction so that the lower end of the alignment plate abuts against the outer wall of the pipe or separates from the outer wall of the pipe.

[0015] In one possible implementation, the lower end of the alignment plate has a roller rotatably connected thereto, the rotation axis of which is parallel to the axis of the grinding wheel for abutting against the outer wall of the pipe.

[0016] In one possible implementation, the adjusting member includes:

[0017] A linkage plate is disposed on the upper side of the fixed plate and connected to the two alignment plates; a transmission nut is disposed on the linkage plate, the axis of the transmission nut being parallel to the vertical direction; and

[0018] A drive screw is rotatably connected to the fixed plate and threadedly connected to the transmission nut, so that when the drive screw rotates, the transmission nut drives the linkage plate to move in the up and down direction.

[0019] In one possible implementation, the linkage plate has a through hole extending in the vertical direction, the through hole being located between the two alignment plates, and the through hole being adapted for the drive screw to pass through;

[0020] The upper side of the linkage plate is also provided with a recessed groove that communicates with the through hole. The recessed groove communicates with the through hole and is suitable for the transmission nut to be inserted.

[0021] In one possible implementation, the fixing plate has a mounting plate that engages with the positioning member;

[0022] The positioning element has a fixing screw, and the mounting plate has a reserved hole suitable for the fixing screw to pass through and extend; a locking nut is threaded onto the fixing screw, and the locking nut is used to abut against the side of the mounting plate opposite to the positioning element, so as to restrict the separation of the mounting plate and the positioning element.

[0023] In one possible implementation, the rotation drive component is a first rotation motor fixedly mounted on the positioning member;

[0024] The power output axis of the first rotating motor is parallel to the axis of the grinding wheel, and its power output end is coaxially connected to the grinding wheel; furthermore, the positioning member is provided with a protective shell suitable for covering the outer periphery of the first rotating motor.

[0025] In one possible implementation, the positioning member has an upwardly extending connecting rod that is slidably connected to the bracket in a vertical direction; the lifting drive component is a linear cylinder mounted on the bracket and driven by the connecting rod.

[0026] In one possible implementation, each of the support rollers has anti-slip textures on its outer peripheral wall; the anti-slip textures are arranged circumferentially along the support roller and extend axially along the support roller.

[0027] In one possible implementation, one of the support rollers is driven to be connected to a second rotary motor, or both of the support rollers are driven to be connected to a second rotary motor.

[0028] The second rotating motor is fixedly mounted on the base, and its power output axis is parallel to the axis of the support roller, and the power output end of the second rotating motor is coaxially connected to the end of the support roller.

[0029] In this embodiment, the pipe can be supported by two support rollers, and the axial direction of the pipe is parallel to the axial direction of the support rollers. Based on this, by rotating one of the support rollers or by rotating both support rollers at the same time, the pipe can be rotated around its own central axis.

[0030] When the pipe is mounted on the support roller, the lifting drive component can move the positioning component downwards, causing the outer edge of the grinding wheel to abut against the outer wall of the pipe. As the rotating drive component drives the grinding wheel to rotate, the outer circumferential surface of the grinding wheel rubs against the pipe, achieving the technical purpose of cutting the pipe. Simultaneously, the pipe rotates around its central axis, increasing the cutting range to achieve pipe segmentation.

[0031] During the process of the grinding wheel cutting the pipe, two sets of limiting devices can simultaneously abut against two pipe sections to limit the pipe sections from shifting, thereby achieving the positioning of the pipe and ensuring the grinding and cutting effect of the pipe.

[0032] Compared with the prior art, the pipe grinding and cutting device provided in this embodiment can fix the pipe sections on both sides of the pipe cutting position, prevent misalignment during the pipe grinding and cutting process, ensure the flatness of the pipe grinding and cutting rear end face, and thus improve the yield and finished product effect. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the pipe grinding and cutting device provided in the embodiments of this application;

[0035] Figure 2 for Figure 1 Front view;

[0036] Figure 3 For along Figure 2 Cross-sectional view of line AA in the middle;

[0037] Figure 4 This is a partially enlarged schematic diagram of the lifting drive component used in the embodiments of this application;

[0038] Figure 5 This is a partial schematic diagram of the support roller and the second rotating motor used in the embodiments of this application from an exploded view.

[0039] Figure 6 This is a front view of the positioning and limiting components used in the embodiments of this application in an assembled state;

[0040] Figure 7 This is an exploded structural diagram of the positioning element used in the embodiments of this application;

[0041] Figure 8 This is a partially enlarged schematic diagram of the positioning element and mounting plate used in the embodiments of this application from an exploded view.

[0042] Figure 9 This is an exploded view of the alignment plate and linkage plate used in the embodiments of this application.

[0043] Figure 10 This is a three-dimensional structural diagram of the drive screw used in the embodiments of this application;

[0044] Explanation of reference numerals in the attached drawings: 1. Base; 11. Support roller; 12. Bracket; 2. Positioning component; 21. Grinding wheel; 211. Rotation drive component; 22. Fixing screw; 221. Locking nut; 23. Protective shell; 24. Connecting rod; 3. Limiting component; 31. Fixing plate; 32. Alignment plate; 321. Roller; 4. Lifting drive component; 5. Adjusting component; 51. Linkage plate; 511. Through hole; 512. Sinking groove; 513. Transmission nut; 52. Drive screw; 6. Mounting plate; 61. Reserved hole; 7. Second rotating motor. Detailed Implementation

[0045] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0046] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0047] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0049] Please refer to the following: Figures 1 to 10 The pipe grinding and cutting device provided in this application will now be described. The pipe grinding and cutting device proposed in this application includes a base 1, a positioning element 2, and two sets of limiting elements 3.

[0050] The base 1 is used to fix itself on a horizontal surface, and its upper side has a concave structure. Two parallel support rollers 11 are arranged within the concave structure; in this embodiment, for ease of description, the axial direction of the support rollers 11 is defined as the front-to-back direction. Based on this, the front and rear faces of the two support rollers 11 are aligned with each other, and the end of each support roller 11 is rotatably connected to the base 1 in the front-to-back direction. In actual use, the pipe can be placed on the support structure formed by the two support rollers 11. At this time, the two support rollers 11 simultaneously abut against the pipe, and the projection of the pipe's central axis downwards is the line of symmetry of the downward projection of the central axes of the two support rollers 11. Furthermore, when one of the support rollers 11 is rotated (or both support rollers 11 rotate synchronously and in the same direction) by manual or automatic drive, the pipe will rotate about its own central axis under the action of the support roller 11.

[0051] A bracket 12 is provided on the outside of the base 1. This bracket 12 is also used to fix it on the horizontal plane, and part of the bracket 12 is above the base 1. That is to say, when the pipe is placed on the support roller 11, the bracket 12 can be arranged around the outer periphery of the pipe by adjusting the position of the pipe in the front-back direction.

[0052] The positioning element 2 is slidably mounted on the bracket 12 in the vertical direction, and is connected to a lifting drive component 4 for driving its movement. When the pipe is mounted on the support roller 11, the positioning element 2 is located on the upper side of the pipe; that is, in this embodiment, the longitudinal movement of the positioning element 2 can also be described as the movement of the positioning element 2 toward or away from the pipe.

[0053] The lower end of the positioning member 2 has a grinding wheel 21 rotatably connected thereto, and a rotating drive member 211 pulverically connected to the grinding wheel 21; the surface of the grinding wheel 21 faces the front-back direction, and the rotation axis is parallel to the axis (i.e. the front-back direction) of the support roller 11, so that after the positioning member 2 moves toward the pipe, the outer edge of the grinding wheel 21 can contact the upper outer wall of the pipe.

[0054] When the outer edge of the grinding wheel 21 contacts the outer wall of the pipe, the grinding wheel 21 is rotated by the rotating drive component 211, which allows the grinding wheel 21 to gradually rotate into the pipe. During this process, the pipe relies on the friction between itself and the support roller 11 to prevent rotation. It should be noted that, under normal circumstances, the rotation direction of the grinding wheel 21 is opposite to the rotation direction of the support roller 11, so as to avoid the process of the support roller 11 driving the pipe to rotate affecting the cutting effect of the grinding wheel 21 on the pipe.

[0055] Two sets of limiting members 3 are respectively disposed on both sides of the positioning member 2 facing the axial direction of the grinding wheel 21, that is, on the front and rear sides of the positioning member 2, and can move synchronously with the movement of the positioning member 2 so that they can abut against the pipe after the grinding wheel 21. Specifically, when the grinding wheel 21 abuts against the pipe, the limiting member 3 still has a certain distance from the outer wall of the pipe; when the grinding wheel 21 cuts into the pipe to the required depth, the limiting member 3 abuts against the pipe to prevent the grinding wheel 21 from cutting in too much. In addition, the two limiting members 3 abut against the two pipe sections on both sides of the pipe cutting position to prevent the pipe sections from translating or shifting relative to the base 1.

[0056] In this embodiment, the pipe can be supported by two support rollers 11, and the axial direction of the pipe is parallel to the axial direction of the support rollers 11, with the pipe located at the center of the area between the two support rollers 11. Based on this, by rotating one of the support rollers 11, or by rotating both support rollers 11 in the same direction at the same time, the pipe can be rotated about its own central axis.

[0057] When the pipe is positioned on the support roller 11, the lifting drive component 4 can drive the positioning component 2 to move downwards, so that the outer edge of the grinding wheel 21 abuts against the outer wall of the pipe. Thus, when the rotation drive component 211 drives the grinding wheel 21 to rotate, the outer circumferential surface of the grinding wheel 21 rubs against the pipe, achieving the technical purpose of the grinding wheel 21 cutting the pipe. At the same time, the pipe rotates around its own central axis, which can increase the cutting range to achieve the cutting of the pipe.

[0058] During the process of the grinding wheel 21 cutting the pipe, two sets of limiting members 3 can simultaneously abut against two pipe sections to limit the pipe sections from shifting, thereby achieving the positioning of the pipe and ensuring the grinding effect of the pipe.

[0059] Compared with the prior art, the pipe grinding and cutting device provided in this embodiment can fix the pipe sections on both sides of the pipe cutting position, prevent misalignment during the pipe grinding and cutting process, ensure the flatness of the pipe grinding and cutting rear end face, and thus improve the yield and finished product effect.

[0060] In some embodiments, such as Figure 1 and Figure 6 As shown, the limiting member 3 includes a fixing plate 31 and two alignment plates 32.

[0061] The fixing plate 31 is set on the positioning member 2 and is located on one side of the positioning member 2 facing the axial direction (i.e., the front-back direction) of the grinding wheel 21. It extends along the axial direction of the grinding wheel 21 and the plate surface faces the up-down direction.

[0062] Two alignment plates 32 are arranged side by side on the fixed plate 31 in a horizontal direction, and their arrangement direction is perpendicular to the axis of the grinding wheel 21 (i.e., the left-right direction). Specifically, the fixed plate 31 is provided with a strip-shaped hole that runs through the vertical direction. The length of this strip-shaped hole is equal to the width of the alignment plate 32, so as to allow the alignment plate 32 to pass through in the vertical direction, thereby achieving positioning and guidance relative to the alignment plate 32.

[0063] In this embodiment, each alignment plate 32 is slidably connected to the fixing plate 31 in the vertical direction. Based on this, the fixing plate 31 is provided with an adjusting member 5 connected to the two alignment plates 32. In actual use, this adjusting member 5 is used to drive the two alignment plates 32 to move in the vertical direction so that the lower end of the alignment plate 32 abuts against the outer wall of the pipe or separates from the outer wall of the pipe.

[0064] In other words, by adjusting the distance adjustment component 5, the distance between the lower end of the alignment plate 32 and the lower end of the grinding wheel 21 can be increased or decreased, thereby changing the maximum depth to which the grinding wheel 21 can cut into the pipe and adapting to pipes of different specifications.

[0065] In some embodiments, such as Figure 1 and Figure 6 As shown, the lower end of the alignment plate 32 has a roller 321 rotatably connected to it. The rotation axis of this roller 321 is parallel to the axis of the grinding wheel 21, so as to abut against the outer wall of the pipe and ensure that the pipe can rotate about its own central axis while being subjected to pressure.

[0066] In some embodiments, such as Figure 6 As shown, the adjusting component 5 includes a linkage plate 51 and a drive screw 52.

[0067] The linkage plate 51 is located on the upper side of the fixed plate 31 and is connected to the two alignment plates 32; a transmission nut 513 is fixedly installed on the linkage plate 51, and the axial direction of the transmission nut 513 is parallel to the vertical direction.

[0068] The drive screw 52 is rotatably connected to the fixed plate 31 and threadedly connected to the transmission nut 513, so that when the drive screw 52 rotates, the transmission nut 513 drives the linkage plate 51 to move in the up and down direction.

[0069] Based on the concept of detachable connection, a groove is provided on the upper side of the fixing plate 31, and a connecting block is embedded in the groove at the lower end of the drive screw 52. A cover is provided at the opening of the groove, which is detachably connected to the fixing plate 31. This cover can prevent the connecting block from leaving the groove and also avoid affecting the rotation of the drive screw 52. At the same time, in order to facilitate the rotation of the drive screw 52, ​​a handle for operator hand operation is also connected to the upper end of the drive screw 52. This handle extends radially outward along the drive screw 52, ​​and the extended end has a handle that is rotatably connected to it in the vertical direction for the operator to hold.

[0070] In some embodiments, such as Figure 9 As shown, the linkage plate 51 has a through hole 511 extending vertically. The through hole 511 is located between the two alignment plates 32 and is suitable for the aforementioned drive screw 52 to pass through. Based on this, the upper side of the linkage plate 51 also has a recessed groove 512 communicating with the through hole 511. The recessed groove 512 is coaxially connected with the through hole 511 and is suitable for the insertion of the transmission nut 513, so as to realize the recessed installation of the transmission nut 513, ensure the balance of the overall structure, and improve the structural stability of the device.

[0071] In some embodiments, such as Figure 8 As shown, the fixing plate 31 has a mounting plate 6 integrally connected to it, and the surface of the mounting plate 6 is perpendicular to the surface of the fixing plate 31. When the fixing plate 31 is set on the front or rear side of the positioning member 2, the mounting plate 6 is used to connect with the positioning member 2 to increase the contact area and improve the stability of the combined structure.

[0072] To connect the mounting plate 6 to the positioning member 2, the positioning member 2 has a fixing screw 22 fixedly connected to it, which extends in the front-rear direction. The mounting plate 6 has a reserved hole 61 suitable for the fixing screw 22 to pass through and extend; and a locking nut 221 is threadedly connected to the fixing screw 22. The locking nut 221 is used to tighten onto the fixing screw 22 and abuts against the side of the mounting plate 6 facing away from the positioning member 2 to prevent the separation of the mounting plate 6 and the positioning member 2.

[0073] In some embodiments, such as Figure 7 As shown, the rotation drive component 211 is a first rotation motor fixedly mounted on the positioning component 2.

[0074] In this embodiment, the power output axis of the first rotating motor is parallel to the axis of the grinding wheel 21, and its power output end is coaxially connected to the grinding wheel 21; in addition, the positioning member 2 is also provided with a protective shell 23 suitable for covering the outer periphery of the first rotating motor to prevent the normal use of the first rotating motor from being affected.

[0075] In some embodiments, such as Figure 4 As shown, the positioning member 2 has an upwardly extending connecting rod 24, which is slidably connected to the bracket 12 in the vertical direction; specifically, the bracket 12 has a through hole in the vertical direction, and the connecting rod 24 is slidably inserted into this hole.

[0076] Based on this, the lifting drive component 4 is a linear cylinder, which is fixedly mounted on the bracket 12 and is connected to the aforementioned connecting rod 24 for transmission.

[0077] By adopting the above technical solution, the positioning component 2 can be automatically driven and moved precisely at a specified distance using a linear cylinder, which is beneficial for the implementation of automatic pipe grinding and cutting operations.

[0078] In some embodiments, such as Figure 5 As shown, each support roller 11 has anti-slip patterns on its outer peripheral wall; the anti-slip patterns are arranged circumferentially along the support roller 11 and extend axially along the support roller 11. Specifically, the anti-slip patterns refer to multiple raised ridges surrounding the outer periphery of the support roller 11, each raised ridge being connected to the outer peripheral wall of the support roller 11 and extending axially along the support roller 11.

[0079] By adopting the above technical solution, the anti-slip texture can enhance the friction between the support roller 11 and the pipe, making the process of the support roller 11 driving the pipe to rotate more stable, while avoiding slippage between the pipe and the support roller 11, and ensuring the stability when the pipe is cut by the grinding wheel 21.

[0080] In some embodiments, such as Figure 1 and Figure 5 As shown, one of the support rollers 11 is driven to the second rotary motor 7, or both support rollers 11 are driven to the second rotary motor 7.

[0081] The second rotating motor 7 is fixedly mounted on the base 1, and its power output axis is parallel to the axis of the support roller 11. The power output end of the second rotating motor 7 is coaxially connected to the end of the support roller 11.

[0082] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pipe grinding and cutting device, characterized in that, include: A base is provided with two parallel support rollers, each of which is rotatably connected to the base to support the pipe and drive it to rotate. A bracket is provided on the outside of the base, and part of the bracket is located above the base; A positioning element is slidably mounted on the bracket in the vertical direction and is driven by a lifting drive component. The lower end of the positioning element has a grinding wheel rotatably connected to it, and a rotation drive component is driven by the grinding wheel. The rotation axis of the grinding wheel is parallel to the axis of the support roller, so that the outer edge of the grinding wheel can contact the upper outer wall of the pipe. Two sets of limiting members are respectively disposed on both sides of the positioning member facing the axial direction of the grinding wheel, and are used to abut against both sides of the pipe cutting position.

2. The pipe grinding and cutting device as described in claim 1, characterized in that, The limiting component includes: A fixing plate is disposed on the positioning member and is located on one side of the positioning member facing the axial direction of the grinding wheel; and Two alignment plates are arranged side by side on the fixed plate in a horizontal direction, and their arrangement direction is perpendicular to the axis of the grinding wheel. Each of the alignment plates is slidably connected to the fixing plate in the vertical direction; the fixing plate is provided with an adjusting member connected to the two alignment plates, the adjusting member being used to drive the two alignment plates to move in the vertical direction so that the lower end of the alignment plate abuts against the outer wall of the pipe or separates from the outer wall of the pipe.

3. The pipe grinding and cutting device as described in claim 2, characterized in that, The lower end of the alignment plate has a roller rotatably connected thereto, the rotation axis of which is parallel to the axis of the grinding wheel, so as to abut against the outer wall of the pipe.

4. The pipe grinding and cutting device as described in claim 2, characterized in that, The adjusting component includes: A linkage plate is disposed on the upper side of the fixed plate and connected to the two alignment plates; a transmission nut is disposed on the linkage plate, the axis of the transmission nut being parallel to the vertical direction; and A drive screw is rotatably connected to the fixed plate and threadedly connected to the transmission nut, so that when the drive screw rotates, the transmission nut drives the linkage plate to move in the up and down direction.

5. The pipe grinding and cutting device as described in claim 4, characterized in that, The linkage plate has a through hole running vertically through the vertical direction. The through hole is located between the two alignment plates and is adapted to allow the drive screw to pass through. The upper side of the linkage plate is also provided with a recessed groove that communicates with the through hole. The recessed groove communicates with the through hole and is suitable for the transmission nut to be inserted.

6. The pipe grinding and cutting device as described in claim 2, characterized in that, The fixing plate has a mounting plate that connects with the positioning member; The positioning element has a fixing screw, and the mounting plate has a reserved hole suitable for the fixing screw to pass through and extend; a locking nut is threaded onto the fixing screw, and the locking nut is used to abut against the side of the mounting plate opposite to the positioning element, so as to restrict the separation of the mounting plate and the positioning element.

7. The pipe grinding and cutting device as described in claim 1, characterized in that, The rotation drive component is a first rotation motor fixedly mounted on the positioning member; The power output axis of the first rotating motor is parallel to the axis of the grinding wheel, and its power output end is coaxially connected to the grinding wheel; furthermore, the positioning member is provided with a protective shell suitable for covering the outer periphery of the first rotating motor.

8. The pipe grinding and cutting device as described in claim 1, characterized in that, The positioning component has an upwardly extending connecting rod, which is slidably connected to the bracket in the vertical direction; the lifting drive component is a linear cylinder mounted on the bracket and driven by the connecting rod.

9. The pipe grinding and cutting device as described in claim 1, characterized in that, Each of the support rollers has anti-slip textures on its outer peripheral wall; the anti-slip textures are arranged circumferentially along the support roller and extend axially along the support roller.

10. The pipe grinding and cutting device as described in claim 1, characterized in that, One of the support rollers is driven to be connected to a second rotating motor, or both of the support rollers are driven to be connected to a second rotating motor. The second rotating motor is fixedly mounted on the base, and its power output axis is parallel to the axis of the support roller, and the power output end of the second rotating motor is coaxially connected to the end of the support roller.

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