Pipe cutting and cleaning assembly and cleaning method

Abstract

The invention relates to a pipe cutting and cleaning assembly. The pipe cutting and cleaning assembly comprises a rack, a supporting mechanism installed on the rack, a cutting mechanism installed in cooperation with the rack and a cleaning mechanism. The supporting mechanism comprises a supporting workbench, a supporting displacement assembly for driving the supporting workbench to do single-degree-of-freedom reciprocating motion, a roller set for bearing the pipe and a jacking device. The rolling wheel set drives a pipe to rotate and cuts the pipe through the cutting mechanism, the cleaning mechanism cleans the pipe, and the jacking device is used for vertically jacking the cut and cleaned pipe and is inclined relative to the horizontal direction; according to the pipe cutting and cleaning assembly, a pipe is positioned and supported through the supporting mechanism integrally installed on the rack, precise cutting and subsequent cleaning of the pipe are achieved through the cutting mechanism and the cleaning mechanism, then the cut pipe is jacked and inclined through the jacking device at the end of the supporting workbench, and then the pipe is cut and cleaned. Water stains inside and outside the cut pipe are rapidly separated, the waiting time of the pipe on equipment is shortened, and the machining efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of metal pipe cutting, and specifically to a pipe cutting and cleaning assembly and cleaning method. Background Technology

[0002] Alloy steel cylindrical tubes (referred to as alloy steel pipes) are hollow circular tubes made by adding various metal elements to carbon steel and then hot-rolling, cold-rolling, seamless or welding processes. They have the advantages of high strength, temperature resistance, corrosion resistance and lightweight. They are widely used in petroleum, chemical, power and defense engineering fields. Existing alloy steel pipes (typical diameter 250mm to 350mm) often need to be cut on site and cleaned of internal residues (such as cement, powder, etc.) in order to meet the needs of on-site use.

[0003] Traditional methods mainly rely on manual labor combined with handheld cutting equipment (such as angle grinders and flame cutters) or fixed waterjet workstations for cutting, followed by cleaning. This has the following drawbacks: Existing equipment often requires manual handling, positioning, and clamping of the pipes, especially for heavier alloy steel pipes. Manual loading is labor-intensive, and the cutting accuracy of the two pipe sections cannot be guaranteed after cutting, affecting the efficiency and quality of the cutting process. Secondly, the pipes need to be cleaned after cutting, and water stains are easily formed after cleaning the inside and outside of the pipes. If they are left on the equipment to dry, it will affect the subsequent cutting of pipes.

[0004] Therefore, to solve the above problems, a pipe cutting and cleaning assembly and construction method are needed. Summary of the Invention

[0005] The pipe cutting and cleaning assembly of the present invention uses a support mechanism integrated on the frame to position and support the pipe. Through the cutting mechanism and the cleaning mechanism, the pipe is accurately cut and subsequently cleaned. Then, the cut pipe is lifted and tilted by the lifting device at the end of the support worktable to ensure that water stains inside and outside the cut pipe are quickly removed, reducing the waiting time of the pipe on the equipment and improving processing efficiency.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] On one hand, the pipe cutting and cleaning assembly of the present invention includes a frame, a support mechanism mounted on the frame for use with pipes, a cutting mechanism mounted on the frame, and a cleaning mechanism; the support mechanism includes a support worktable, a support displacement component mounted on the frame to drive the support worktable to reciprocate in a single degree of freedom, a roller assembly for supporting the pipes on the support worktable, and a lifting device mounted at the end of the support worktable; the roller assembly drives the pipes to rotate and cuts the pipes through the cutting mechanism, the cleaning mechanism cleans the cut pipes, and the lifting device is used to vertically lift the cut and cleaned pipes and tilt them in the horizontal direction.

[0008] Furthermore, the lifting device includes a positioning and lifting assembly, a sliding lifting assembly, and a lifting cylinder, which are hinged to each other on the support worktable; the lifting cylinder drives the sliding lifting assembly to lift vertically and drives the positioning and lifting assembly to lift synchronously vertically.

[0009] Furthermore, the sliding lifting assembly includes a sliding support foot that is slidably and adjustable along the axial direction of the roller assembly to cooperate with the supporting worktable, a sliding lifting rod hinged to the sliding support foot, and a sliding lifting arm installed on the upper end of the sliding lifting rod; the positioning lifting assembly includes a fixed support foot fixedly installed on the supporting worktable, a positioning lifting rod hinged to the fixed support foot, and a positioning lifting arm installed on the upper end of the positioning lifting rod, wherein the installation height of the sliding lifting arm is higher than the installation height of the positioning lifting arm.

[0010] Furthermore, the sliding lifting arm and the positioning lifting arm are arranged in parallel to each other, and both the sliding lifting arm and the positioning lifting arm are provided with arc-shaped positioning grooves to cooperate with the lifting of the pipe.

[0011] Furthermore, the support displacement assembly includes a table guide rail installed at the lower end of the support worktable and a hydraulic telescopic rod for driving the sliding adjustment of the support worktable. The lower end of the support worktable is provided with a lower table slider that cooperates with the sliding of the table guide rail.

[0012] Furthermore, the supporting worktable consists of two identical structures arranged in a straight line, and the supporting displacement components are in two sets, with each set corresponding to and cooperating with the two supporting worktables for driving.

[0013] Furthermore, the end of the support workbench is provided with an axial limiting component, and there are two axial limiting components, which are respectively arranged at both ends of the support workbench.

[0014] Furthermore, the cutting mechanism includes a cutting execution component and a cutting displacement component that drives the cutting execution component to move; the cutting displacement component includes a cutting bracket mounted on the frame, a transverse guide rail fixedly mounted on the cutting bracket, a transverse base that is slidably adjusted in conjunction with the transverse guide rail, and a longitudinal slider that is slidably adjusted on the transverse base; the transverse base can be slidably adjusted along the transverse guide rail, and the longitudinal slider can be slidably adjusted along the longitudinal direction of the transverse base.

[0015] Furthermore, the cutting execution component includes a rotary drive unit mounted on a longitudinal slider and a water jet nozzle mounted in conjunction with the rotary drive unit. The rotary drive unit drives the water jet nozzle to rotate and is used for cutting the pipe. The cleaning mechanism includes a cleaning nozzle mounted on the rotary drive unit. The rotary drive unit drives the cleaning nozzle to rotate and is used for cleaning the pipe.

[0016] On the other hand, the pipe cutting and cleaning method of the present invention includes the following steps:

[0017] S1: Install the pipe to be cut on the support workbench and limit the axial movement of the pipe by the axial limiting component;

[0018] S2: Control the roller group of the support worktable to rotate synchronously and in the same direction, driving the pipe to rotate around its own axis at a set linear speed; start the cutting mechanism to move to the set position and cut the rotating pipe;

[0019] S3: After the pipe is completely cut, drive the two support worktables to slide in opposite directions to misalign the two cut pipe sections; drive the roller group to rotate and drive the cleaning mechanism to clean the two cut pipe sections internally and externally respectively.

[0020] S4: After the cleaning mechanism completes the cleaning, the roller assembly continues to rotate, and then the lifting device is activated to tilt and lift the cut pipe.

[0021] The beneficial effects of this technical solution are:

[0022] The pipe cutting and cleaning assembly of the present invention uses a support mechanism integrated on the frame to position and support the pipe. Through the cutting mechanism and the cleaning mechanism, the pipe is accurately cut and subsequently cleaned. Then, the cut pipe is lifted and tilted by the lifting device at the end of the support worktable to ensure that water stains inside and outside the cut pipe are quickly removed, reducing the waiting time of the pipe on the equipment and improving processing efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall installation of the present invention;

[0024] Figure 2This is a schematic diagram of the side mounting of the support mechanism of the present invention;

[0025] Figure 3 This is a schematic diagram of the pipe cutting and separation according to the present invention;

[0026] Figure 4 This is a schematic diagram of the lifting device of the present invention;

[0027] Figure 5 This is a side view of the lifting device of the present invention.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1-Frame; 2-Cutting bracket; 3-Transverse guide rail; 4-Transverse base; 5-Longitudinal slider; 6-Telescopic gripper; 7-Support displacement assembly; 8-Axial limiting component; 9-Support worktable; 10-Worktable guide rail; 11-Roller assembly; 12-Pipe; 14-Cleaning nozzle; 15-Rotary drive unit; 16-Water jet nozzle; 18-Lifting device; 19-Lifting cylinder; 20-Positioning lifting rod; 21-Sliding lifting rod; 22-Sliding support leg; 23-Sliding lifting arm; 24-Positioning lifting arm; 25-Arc-shaped positioning groove. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] like Figure 1 As shown in the embodiment of this application, the pipe cutting and cleaning assembly of the present invention includes a frame 1, a support mechanism mounted on the frame 1 for use with a pipe 12, a cutting mechanism mounted on the frame 1, and a cleaning mechanism; the support mechanism includes a support worktable 9, a support displacement assembly 7 mounted on the frame 1 to drive the support worktable 9 to reciprocate with a single degree of freedom, a roller assembly 11 disposed on the support worktable 9 to support the pipe 12, and a lifting device 18 installed at the end of the support worktable 9; the roller assembly 11 drives the pipe 12 to rotate and cuts the pipe 12 through the cutting mechanism, the cleaning mechanism cleans the cut pipe 12, and the lifting device 18 is used to vertically lift the cut and cleaned pipe 12 and tilt it in the horizontal direction (e.g., Figure 3 The horizontal direction refers to the horizontal direction in which the pipe 12 is located after it is installed on the roller assembly 11, i.e., the horizontal left-right direction.

[0035] The pipe cutting and cleaning assembly of the present invention uses a support mechanism integrated on the frame 1 to position and support the pipe 12. The frame 1 can be integrated and installed on a special vehicle (an existing vehicle can be used). When in use, the special vehicle only needs to be driven to the designated location, without the need for equipment transportation and installation. The frame 1 is equipped with a telescopic gripper 6 that can move in multiple degrees of freedom (the telescopic structure and the electromagnet adsorption at the end can both use existing technology). The telescopic gripper 6 is used to grip the pipe 12. Through the cutting mechanism and the cleaning mechanism, the pipe 12 is accurately cut and subsequently cleaned. Then, the lifting device 18 at the end of the support workbench 9 lifts and tilts the cut pipe 12 to ensure that the water stains inside and outside the cut pipe 12 are quickly removed, reducing the waiting time of the pipe on the equipment and improving processing efficiency.

[0036] In this embodiment, the lifting device 18 includes a positioning and lifting assembly, a sliding lifting assembly, and a lifting cylinder 19, which are hinged to each other on the support worktable 9; the lifting cylinder 19 drives the sliding lifting assembly along the vertical direction ( Figure 5 The vertical direction is raised, which in turn drives the positioning and lifting components to rise synchronously along the vertical direction.

[0037] like Figure 4-5As shown, the hinged positioning and lifting components and the sliding lifting components are both installed on the support worktable 9. Of course, they are installed between the two roller groups and will not interfere with the roller groups. The lifting cylinder 19 can be selected and installed according to a suitable position, driving the sliding lifting component to lift vertically, and driving the positioning and lifting components to lift synchronously. The positioning and lifting components and the sliding lifting components are at different heights, so that after the two lift synchronously to support and lift the pipe 12, they will form an inclined angle relative to the horizontal direction, so as to remove water stains and reduce the waiting time for subsequent pipes.

[0038] In this embodiment, the sliding lifting assembly includes a sliding support leg 22 that is slidably installed in conjunction with the supporting worktable 9 along the axial direction (i.e., the horizontal direction) of the roller group, a sliding lifting rod 21 hinged to the sliding support leg 22, and a sliding lifting arm 23 installed on the upper end of the sliding lifting rod 21; the positioning lifting assembly includes a fixed support leg fixedly installed on the supporting worktable 9, a positioning lifting rod 20 hinged to the fixed support leg, and a positioning lifting arm 24 installed on the upper end of the positioning lifting rod 20, wherein the installation height of the sliding lifting arm 21 is higher than the installation height of the positioning lifting arm 20.

[0039] like Figure 2-5 As shown, the sliding support 22 is slidably mounted on the support worktable 9, and can be adjusted along the axial direction of the roller assembly (i.e., Figure 5 The horizontal adjustment is performed by sliding. The middle part of the positioning lifting rod 20 is hinged to the sliding lifting rod 21, and the lower end of the positioning lifting rod 20 is hinged to the fixed support. The lifting cylinder 19 can be used as follows: Figure 5 The two arrangement methods shown can be either directly installed at the lower end of the sliding lifting rod 21 to directly drive the bottom of the sliding lifting rod 21 to move, thereby driving the sliding lifting arm 23 to lift, or arranged at the right end of the support workbench 9 to directly install with the sliding lifting arm 23 to directly drive the sliding lifting arm 23 to rise and fall in the vertical direction. The two arrangement methods can be selected and used according to the actual situation.

[0040] In this embodiment, the sliding lifting arm 23 and the positioning lifting arm 24 are arranged in parallel to each other, and both the sliding lifting arm 23 and the positioning lifting arm 24 are provided with arc-shaped positioning grooves 25 that cooperate with the lifting of the pipe 12.

[0041] like Figure 5As shown, the sliding lifting arm 23 and the positioning lifting arm 24 are arranged in parallel to each other, and both have an arc-shaped positioning groove 25 structure at their upper ends. When the arc-shaped positioning groove 25 on the sliding lifting arm 23 contacts the pipe, it continues to lift upward until the arc-shaped positioning groove 25 on the positioning lifting arm 24 contacts the pipe 12. At this time, due to the height difference between the sliding lifting arm 23 and the positioning lifting arm 24, the pipe has a certain tilt angle with the horizontal direction (generally set to 5-8°). Water stains on the inner wall and outer surface of the pipe 12 will flow quickly along the tilt direction to avoid accumulation inside the pipe.

[0042] In this embodiment, the support displacement component 7 includes a worktable guide rail 10 installed at the lower end of the support worktable 9 and a hydraulic telescopic rod for driving the support worktable 9 to slide and adjust. The lower end of the support worktable 9 is provided with a worktable lower slider that cooperates with the worktable guide rail 10 to slide.

[0043] like Figure 1-3 As shown, a worktable guide rail 10 is provided at the lower end of the support worktable 9, and a corresponding worktable lower slider is formed at the bottom of the support worktable 9 for use. The two form a sliding engagement. The hydraulic telescopic rod is installed in conjunction with the frame 1. The hydraulic telescopic rod drives the support worktable 9 to slide and adjust on the worktable guide rail 10. Of course, the hydraulic telescopic rod can also be driven by a motor. The slider and slide rail mechanism is changed to a screw and nut pair structure for engagement. That is, the motor drives the screw at the bottom to rotate, and the rotation of the screw drives the support worktable 9 above to move linearly.

[0044] In this embodiment, there are two identical support worktables 9 arranged in a straight line, and there are two sets of support displacement components 7, which are respectively used to drive the two support worktables 9.

[0045] like Figure 3 As shown, two support worktables 9 are configured with identical structures and arranged in the same straight line direction to facilitate the cutting of pipe 12. After cutting, in order to facilitate the cleaning of the inner and outer walls of the pipe, two support displacement components 7 are used in conjunction with the corresponding support worktables 9. After the pipe 12 is cut, the two support displacement components 7 drive the two support worktables 9 to move in opposite directions, so that the two cut pipes 12 are misaligned to facilitate the subsequent cleaning work.

[0046] In this embodiment, an axial limiting member 8 is provided at the end of the supporting workbench 9. There are two axial limiting members 8, and the two axial limiting members 8 are respectively arranged at both ends of the supporting workbench 9.

[0047] like Figure 2-3As shown, since the two roller sets rotate in the same direction during operation, driving the pipe 12 to rotate, the pipe 12 inevitably jumps during rotation. Therefore, axial limiting members 8 are provided at the ends of the supporting worktable 9. The two axial limiting members 8 are respectively arranged at both ends of the supporting worktable 9 (i.e., Figure 3 The two ends shown are used to axially limit the pipe 12 to prevent axial displacement during the rotation and cutting process of the pipe 12, which would affect the cutting accuracy. The axial limiting component 8 can be a floating limiting structure in the existing technology.

[0048] In this embodiment, the cutting mechanism includes a cutting execution component and a cutting displacement component that drives the cutting execution component to move; the cutting displacement component includes a cutting bracket 2 mounted on the frame 1, a transverse guide rail 3 fixedly mounted on the cutting bracket 2, a transverse base 4 slidably mounted in conjunction with the transverse guide rail 3, and a longitudinal slider 5 slidably mounted on the transverse base 4; the transverse base 4 can be slidably adjusted laterally along the transverse guide rail 3, and the longitudinal slider 5 can be slidably adjusted longitudinally along the transverse base 4.

[0049] like Figure 1 , 3 As shown, the cutting displacement component is used to drive the cutting execution component to move, so as to cooperate in cutting the pipe 12 at a specified position. The cutting bracket 2 is fixedly installed with the frame 1. The transverse guide rail 3 is fixedly installed on the cutting bracket 2. The transverse base 4 is correspondingly slidably installed with the transverse guide rail 3. The transverse base 4 is driven to slide and adjust on the transverse guide rail 3 by an electric push rod or hydraulic mechanism to realize the position adjustment of the transverse base 4. An electric push rod or hydraulic mechanism is also arranged on the transverse base 4 to drive the longitudinal slider 5 to slide and adjust vertically on the transverse base 4 (a groove can be opened on the surface of the transverse base 4, and a protrusion can be adapted on the surface of the longitudinal slider 5 to form a slider. The two slide and cooperate to form a groove slider structure). In this way, the transverse and longitudinal sliding adjustment of the longitudinal slider 5 is realized.

[0050] In this embodiment, the cutting execution component includes a rotary drive unit 15 mounted on a longitudinal slider 5 and a water jet nozzle 16 mounted in conjunction with the rotary drive unit 15. The rotary drive unit 15 drives the water jet nozzle 16 to rotate and is used to cut the pipe 12. The cleaning mechanism includes a cleaning nozzle 14 mounted on the rotary drive unit 15. The rotary drive unit 15 drives the cleaning nozzle 14 to rotate and is used to clean the pipe 12.

[0051] like Figure 1 , 3As shown, the rotary drive unit 15 is rotatably mounted on the longitudinal slider 5. The rotary drive unit 15 integrates a water jet nozzle 16 and a cleaning nozzle 14. When the pipe 12 needs to be cut, the rotary drive unit 15 rotates to drive the water jet nozzle 16 to rotate to a suitable position to cut the pipe 12. After the pipe 12 is cut, the rotary drive unit 15 rotates to drive the cleaning nozzle 14 to clean the cut pipe 12. Of course, the rotary drive unit 15 and the corresponding water jet nozzle 16 and cleaning nozzle 14 can be installed using existing technology, which will not be described in detail here.

[0052] In this embodiment, the pipe cutting and cleaning method of the present invention includes the following steps:

[0053] S1: The pipe 12 to be cut is installed on the support workbench 9, and the pipe 12 is axially limited by the axial limiting component 8; the telescopic gripper 6 adsorbs and grabs the pipe 12 and places it on the support workbench 9, and the axial limiting components 8 at both ends axially limit the pipe 12.

[0054] S2: Control the roller group 11 of the support worktable 9 to rotate synchronously and in the same direction, driving the pipe 12 to rotate around its own axis at a set linear speed; start the cutting mechanism to move to the set position and cut the rotating pipe 12; start the two roller groups 11 on the support worktable 9 to rotate synchronously and in the same direction, driving the pipe 12 to rotate, and drive the cutting mechanism to move to the set position to cut the rotating pipe 12 until the pipe 12 is completely cut off;

[0055] S3: After the pipe 12 is completely cut, drive the two support worktables 9 to slide in opposite directions to misalign the two cut pipe sections 9; drive the roller assembly 11 to rotate and drive the cleaning mechanism to clean the two cut pipe sections 12 internally and externally respectively; after the pipe 12 is completely cut into two ends, drive the two support worktables 9 to move in opposite directions to misalign the two, the roller assembly 11 continues to rotate slowly, driving the pipe 12 to rotate slowly, and drive the cleaning mechanism to start cleaning the inner and outer walls of the two cut pipe sections;

[0056] S4: After the cleaning mechanism completes the cleaning, the roller assembly 11 continues to rotate, and then the lifting device 18 is activated to tilt and lift the cut pipe 12; after the cleaning mechanism completes the cleaning of the two sections of pipe 12, the roller assembly 11 continues to rotate (30-60 seconds) so that the water stains on the outer wall of the pipe 12 are thrown out, then the rotation stops, and the lifting device 18 is activated to tilt and lift the pipe 12 so that the water stains on the inner and outer walls of the pipe 12 are quickly removed from the pipe.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipe cutting and cleaning assembly, characterized in that: The system includes a frame (1), a support mechanism mounted on the frame (1) for use with pipes (12), a cutting mechanism mounted on the frame (1), and a cleaning mechanism. The support mechanism includes a support workbench (9), a support displacement assembly (7) mounted on the frame (1) to drive the support workbench (9) to reciprocate with a single degree of freedom, a roller assembly (11) set on the support workbench (9) to support the pipes (12), and a lifting device (18) installed at the end of the support workbench (9). The roller assembly (11) drives the pipes (12) to rotate and cuts the pipes (12) through the cutting mechanism. The cleaning mechanism cleans the cut pipes (12). The lifting device (18) is used to vertically lift the cut and cleaned pipes (12) and tilt them in the horizontal direction.

2. The pipe cutting and cleaning assembly according to claim 1, characterized in that: The lifting device (18) includes a positioning lifting component, a sliding lifting component, and a lifting cylinder (19) that are hinged to each other on the support worktable (9); the lifting cylinder (19) drives the sliding lifting component to lift in the vertical direction and drives the positioning lifting component to lift in the vertical direction synchronously.

3. The pipe cutting and cleaning assembly according to claim 2, characterized in that: The sliding lifting assembly includes a sliding support (22) that is slidably and adjustable along the axial direction of the roller assembly (11) in conjunction with the supporting worktable (9), a sliding lifting rod (21) hinged to the sliding support (22), and a sliding lifting arm (23) installed on the upper end of the sliding lifting rod (21); the positioning lifting assembly includes a fixed support that is fixedly installed on the supporting worktable (9), a positioning lifting rod (20) hinged to the fixed support, and a positioning lifting arm (24) installed on the upper end of the positioning lifting rod (20), wherein the installation height of the sliding lifting arm (23) is higher than the installation height of the positioning lifting arm (24).

4. The pipe cutting and cleaning assembly according to claim 3, characterized in that: The sliding lifting arm (23) and the positioning lifting arm (24) are arranged in parallel to each other. Both the sliding lifting arm (23) and the positioning lifting arm (24) are provided with arc-shaped positioning grooves (25) for lifting the pipe (12).

5. The pipe cutting and cleaning assembly according to claim 1, characterized in that: The support displacement assembly (7) includes a worktable guide rail (10) installed at the lower end of the support worktable (9) and a hydraulic telescopic rod for driving the support worktable (9) to slide and adjust. The lower end of the support worktable (9) is provided with a worktable lower slider that works in conjunction with the worktable guide rail (10).

6. The pipe cutting and cleaning assembly according to claim 1, characterized in that: The support worktables (9) are two identical structures arranged in a straight line. The support displacement components (7) are two sets, and the two sets of support displacement components (7) are respectively used in conjunction with the two support worktables (9) for driving.

7. The pipe cutting and cleaning assembly according to claim 1, characterized in that: The end of the support workbench (9) is provided with an axial limiting member (8), and there are two axial limiting members (8), which are respectively arranged at both ends of the support workbench (9).

8. The pipe cutting and cleaning assembly according to claim 1, characterized in that: The cutting mechanism includes a cutting execution component and a cutting displacement component that drives the cutting execution component to move; the cutting displacement component includes a cutting bracket (2) mounted on the frame (1), a transverse guide rail (3) fixedly mounted on the cutting bracket (2), a transverse base (4) slidably mounted in coordination with the transverse guide rail (3), and a longitudinal slider (5) slidably mounted on the transverse base (4); the transverse base (4) can be slidably adjusted along the transverse guide rail (3), and the longitudinal slider (5) can be slidably adjusted along the longitudinal direction of the transverse base (4).

9. The pipe cutting and cleaning assembly according to claim 8, characterized in that: The cutting execution assembly includes a rotary drive unit (15) mounted on a longitudinal slider (5) and a water jet nozzle (16) mounted in conjunction with the rotary drive unit (15). The rotary drive unit (15) drives the water jet nozzle (16) to rotate and is used to cut the pipe (12). The cleaning mechanism includes a cleaning nozzle (14) mounted on the rotary drive unit (15). The rotary drive unit (15) drives the cleaning nozzle (14) to rotate and is used to clean the pipe (12).

10. A method for cutting and cleaning pipes, characterized in that: The pipe cutting and cleaning assembly as described in any one of claims 1 to 9 is used for cutting and cleaning, including the following steps: S1: Install the pipe (12) to be cut on the support workbench (9) and limit the pipe (12) axially by the axial limiting component (8); S2: Control the roller group (11) of the support worktable (9) to rotate synchronously and in the same direction, driving the pipe (12) to rotate around its own axis at a set linear speed; start the cutting mechanism to move to the set position and cut the rotating pipe (12); S3: After the pipe (12) is completely cut, drive the two support worktables (9) to slide in opposite directions to make the two cut pipe sections (12) misaligned; drive the roller group (11) to rotate and drive the cleaning mechanism to clean the two cut pipe sections (12) internally and externally respectively. S4: After the cleaning mechanism completes the cleaning, the roller assembly (11) continues to rotate, and then the lifting device (18) is started to tilt and lift the cut pipe (12).

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