Pipeline cutting equipment for municipal engineering construction

Abstract

Pipeline cutting equipment for municipal engineering construction relates to the technical field of pipeline cutting and comprises a workbench, two limiting assemblies and a cutting assembly are sequentially arranged at the top of the workbench in the moving direction of pipelines, the pipelines with different diameters can be automatically and rapidly cut through the cutting assembly, and the end openings of the cut pipelines are smooth; pipelines with different diameters can be clamped through the limiting assembly, and the pipelines are rapidly conveyed to the cutting assembly; the cutting assembly comprises a vertically-arranged rotating circular plate, a circular groove coaxial with the rotating circular plate is formed in the end of the rotating circular plate in a penetrating mode, three sliding plates are evenly distributed at the end of the rotating circular plate in the circumferential direction of the rotating circular plate, and the three sliding plates are synchronously arranged in a sliding mode in the radial direction of the rotating circular plate. The pipeline cutting device solves the problems that an existing pipeline cutting device for municipal engineering construction is low in cutting efficiency, and the end face of a cut pipeline is uneven. When the pipeline is continuously cut, the operation process is tedious, and the cutting speed is low. And the equipment practicability is low.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline cutting, in particular to a pipeline cutting device for municipal engineering construction. Background Art

[0002] A pipeline refers to a device connected by pipes, pipe fittings and valves for transporting gas, liquid or fluid with solid particles. Pipelines have a wide range of uses, mainly in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial installations. With the development of society, the application of pipelines has become more and more extensive.

[0003] During the construction of municipal engineering, pipes need to be laid. When laying pipes, the length of pipes used at each location is inconsistent, and cutting equipment is needed to cut the pipes.

[0004] The existing pipe cutting equipment for municipal engineering construction has gradually exposed its shortcomings during use, mainly in the following aspects:

[0005] First, when cutting the pipe, the staff needs to fix the pipe first, then hold the cutting tool and rotate it around the cutting part of the pipe to cut the pipe. The way the staff hold the cutting tool and cut is not only inefficient, but also the end face of the pipe after cutting is uneven, which affects the cutting effect of the pipe.

[0006] Second, when continuously cutting the pipeline, the staff needs to repeatedly fix, move, cut and release the pipeline. The operation process of continuous cutting of the pipeline is cumbersome, time-consuming and labor-intensive, resulting in low cutting efficiency when continuously cutting the pipeline.

[0007] Third, the existing equipment can only cut pipes of a certain diameter. When cutting pipes of different diameters, the corresponding cutting equipment needs to be replaced, resulting in low applicability of the equipment.

[0008] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0009] In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide a pipe cutting device for municipal engineering construction, which can automatically and quickly cut the pipe, and the pipe end after cutting is flat;

[0010] The equipment can also cut the pipe continuously, which not only makes the cutting process simple but also has high cutting efficiency;

[0011] The device can also cut pipes of different diameters, which increases the applicability of the device.

[0012] In order to solve the above problems, the utility model provides the following technical solutions:

[0013] A pipe cutting device for municipal engineering construction comprises a workbench, wherein two limit assemblies and a cutting assembly are sequentially arranged on the top of the workbench along the moving direction of the pipe.

[0014] The cutting assembly can automatically and quickly cut pipes of different diameters, and the pipe ends after cutting are flat; the limiting assembly can clamp pipes of different diameters and quickly deliver the pipes to the cutting assembly;

[0015] The cutting assembly comprises a vertically arranged rotating circular plate, a circular groove coaxially arranged therewith is penetrated at the end of the rotating circular plate, three sliding plates are evenly distributed along the circumference of the end of the rotating circular plate, the three sliding plates are synchronously slidably arranged along the radial direction of the rotating circular plate, and a cutting blade is arranged to rotate along a horizontal line at the end of the sliding plate located in the circular groove.

[0016] The rotating circular plate is also arranged to reciprocate along its axis. When the pipe is clamped by two limit assemblies, the pipe is coaxial with the rotating circular plate. The three sliding plates slide until the cutting blade abuts against the outer wall of the pipe. When the rotating circular plate reciprocates, the cutting blade cuts the pipe.

[0017] As an optimized solution, the limit assembly includes a vertically arranged moving plate, the end of the moving plate is penetrated by a rectangular groove, two V-shaped clamping blocks arranged opposite to each other are arranged vertically in the rectangular groove, the two V-shaped clamping blocks are symmetrically arranged along the axial section of the rotating circular plate, and the two V-shaped clamping blocks are also arranged to slide toward each other or relatively.

[0018] The movable plate is also arranged to slide horizontally, and three fixed arc plates are arranged horizontally and side by side above the workbench, the inner walls of the fixed arc plates are arranged upward, and the three fixed arc plates are arranged alternately with the two movable plates;

[0019] When the V-shaped clamping blocks on the two movable plates slide toward each other until they abut against the outer wall of the pipe, the pipe placed on the fixed arc plate is clamped and fixed, and when the two movable plates move toward the direction close to the cutting blade, the pipe is transported.

[0020] As an optimized solution, a lifting arc plate is provided on the top of the workbench for vertical lifting, the inner wall of the lifting arc plate is arranged upward, and the lifting arc plate and the rotating circular plate are arranged front and back along the moving direction of the pipeline.

[0021] When the pipe is cut, the inner wall of the lifting arc plate abuts against the outer wall of the pipe, and the lifting arc plate can prevent the cut pipe from falling.

[0022] As an optimized solution, the ends of the sliding plates are fixed with driven racks, and the ends of the rotating circular plates are evenly distributed with three synchronously rotating driven gears along their circumferences, and the three driven gears are correspondingly meshed with three driven racks.

[0023] As an optimized solution, a support plate is vertically fixed on the top of the workbench, and a rotating tube is coaxially fixed to the other end of the rotating circular plate. One end of the rotating tube passes through the support plate and is rotatably connected to the support plate.

[0024] As an optimized solution, the ends of the driven gears are fixedly connected with a transmission shaft, one end of the transmission shaft passes through a rotating circular plate and is fixedly connected with a driving gear, the transmission shaft is rotatably connected to the rotating circular plate, and a driving internal gear ring is coaxially provided in the rotating tube and rotatably connected to its inner wall, and the driving gears are all meshed with the driving internal gear ring.

[0025] As an optimized solution, a driven outer gear ring is fixedly mounted on the outer wall of the rotating tube, and a control gear meshing with the driven outer gear ring is rotatably mounted on the end of the support plate.

[0026] As an optimized solution, the relative side walls of the V-shaped clamp are fixed with a lifting plate that is vertically slidably connected to the inner wall of the movable plate, and two double-threaded screw rods that are arranged to rotate along a plumb line are provided in the rectangular groove. The two double-threaded screw rods are located on the left and right sides of the V-shaped clamp, and the two ends of the double-threaded screw rods respectively pass through the two lifting plates and are threadedly connected to the lifting plates.

[0027] As an optimized solution, two sliding blocks which are arranged to slide horizontally are arranged on the top of the workbench. The two sliding blocks are also arranged to slide synchronously. The two sliding blocks are fixedly connected to the two movable plates via connecting rods.

[0028] As an optimized solution, two telescopic cylinders are fixedly provided on the top of the workbench, and the telescopic ends of the telescopic cylinders are fixedly connected to the lifting arc plate.

[0029] Compared with the prior art, the beneficial effects of the utility model are:

[0030] 1. The cutting component can automatically and quickly cut the pipe, and the pipe end after cutting is flat, which improves the cutting effect of the pipe;

[0031] 2. The limit assembly and the cutting assembly can be used to continuously cut the pipe, which not only simplifies the cutting process but also improves the cutting efficiency;

[0032] 3. By cooperating with the limiting component and the cutting component, pipes of different diameters can be quickly cut, which improves the practicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0034] Figure 1 It is a structural schematic diagram of the utility model;

[0035] Figure 2 It is a structural schematic diagram of the cutting assembly of the utility model;

[0036] Figure 3 It is a structural schematic diagram of the limit assembly of the utility model;

[0037] Figure 4 It is a structural schematic diagram of the main gear of the utility model;

[0038] Figure 5 It is a structural schematic diagram of the transmission shaft of the utility model;

[0039] Figure 6 It is a structural schematic diagram of the sliding block of the utility model.

[0040] In the figure: 1-working table; 2-pipeline; 3-limiting assembly; 4-cutting assembly; 5-lifting arc plate; 6-telescopic cylinder; 7-fixed arc plate; 8-support rod; 9-control gear; 10-driven gear; 11-circular groove; 12-support plate; 13-control motor; 14-rotating tube; 15-driven outer gear ring; 16-rotating circular plate; 17-cutting blade; 18-sliding plate; 19-driven rack; 20-reduction motor; 21-driving gear; 22-main gear; 23- The first driving motor; 24-driving inner gear ring; 25-transmission shaft; 26-second driving motor; 27-first driving wheel; 28-first driven wheel; 29-moving plate; 30-V-type clamping block; 31-rectangular groove; 32-double-thread screw rod; 33-lifting plate; 34-connecting rod; 35-sliding block; 36-single-thread screw rod; 37-fixed plate; 38-second driving wheel; 39-third driving motor; 40-second transmission belt; 41-second driven wheel; 42-first transmission belt 42. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0042] like Figures 1 to 6 As shown, a pipe cutting device for municipal engineering construction includes a workbench 1, and two limit assemblies 3 and a cutting assembly 4 are sequentially arranged on the top of the workbench 1 along the moving direction of the pipe 2.

[0043] The cutting assembly 4 can automatically and quickly cut pipes 2 of different diameters, and the ends of the pipes 2 after cutting are flat; the limiting assembly 3 can clamp pipes 2 of different diameters and quickly transport the pipes 2 to the cutting assembly 4;

[0044] The cutting assembly 4 includes a vertically arranged rotating circular plate 16, a circular groove 11 coaxially arranged therewith is penetrated at the end of the rotating circular plate 16, three sliding plates 18 are evenly distributed along the circumference of the end of the rotating circular plate 16, and the three sliding plates 18 are synchronously slidably arranged along the radial direction of the rotating circular plate 16, and a cutting blade 17 is arranged to rotate along a horizontal line at the end of the sliding plate 18 located in the circular groove 11.

[0045] The rotating circular plate 16 is also arranged to reciprocate along its axis. When the pipe 2 is clamped by the two limit assemblies 3, the pipe 2 is coaxial with the rotating circular plate 16. The three sliding plates 18 slide until the cutting blade 17 abuts against the outer wall of the pipe 2. When the rotating circular plate 16 reciprocates, the cutting blade 17 cuts the pipe 2.

[0046] The limit assembly 3 includes a vertically arranged moving plate 29, and a rectangular groove 31 is penetrated at the end of the moving plate 29. Two V-shaped clamping blocks 30 arranged opposite to each other are arranged vertically in the rectangular groove 31. The two V-shaped clamping blocks 30 are symmetrically arranged along the axial section of the rotating circular plate 16, and the two V-shaped clamping blocks 30 are also arranged to slide toward each other or relatively.

[0047] The movable plate 29 is also arranged to slide horizontally, and three fixed curved plates 7 are arranged horizontally and side by side above the workbench 1, and the inner walls of the fixed curved plates 7 are arranged upward, and the three fixed curved plates 7 and the two movable plates 29 are arranged alternately;

[0048] When the V-shaped clamping blocks 30 on the two movable plates 29 slide toward each other until they abut against the outer wall of the pipe 2, the pipe 2 placed on the fixed arc plate 7 is clamped and fixed, and when the two movable plates 29 move toward the direction close to the cutting blade 17, the pipe 2 is transported.

[0049] The top of the workbench 1 is vertically lifted with a lifting arc plate 5, the inner wall of the lifting arc plate 5 is set upward, and the lifting arc plate 5 and the rotating circular plate 16 are arranged front and back along the moving direction of the pipeline 2.

[0050] When the pipe 2 is cut, the inner wall of the lifting arc plate 5 abuts against the outer wall of the pipe 2, and the lifting arc plate 5 can prevent the cut pipe 2 from falling.

[0051] The ends of the sliding plate 18 are fixed with driven racks 19 , and the ends of the rotating circular plate 16 are evenly distributed with three synchronously rotating driven gears 10 along the circumference thereof. The three driven gears 10 are meshed with the three driven racks 19 correspondingly.

[0052] A support plate 12 is vertically fixed on the top of the workbench 1 , and a rotating tube 14 is coaxially fixed to the other end of the rotating circular plate 16 . One end of the rotating tube 14 passes through the support plate 12 and is rotatably connected to the support plate 12 .

[0053] The ends of the driven gears 10 are fixedly connected with a transmission shaft 25, one end of the transmission shaft 25 passes through the rotating circular plate 16 and is fixedly connected with a driving gear 21. The transmission shaft 25 is rotatably connected to the rotating circular plate 16. A driving internal gear ring 24 rotatably connected to the inner wall of the rotating tube 14 is coaxially provided inside the rotating tube 14, and the driving gears 21 are all meshed with the driving internal gear ring 24.

[0054] A main gear 22 meshing with a driving inner gear ring 24 is rotatably provided at the other end of the rotating circular plate 16 . A first driving motor 23 is fixedly provided on the inner wall of the rotating tube 14 . The output end of the first driving motor 23 is fixedly connected to the main gear 22 .

[0055] A driven outer gear ring 15 is fixedly mounted on the outer wall of the rotating tube 14 , and a control gear 9 meshing with the driven outer gear ring 15 is rotatably mounted on the end of the supporting plate 12 .

[0056] A reduction motor 20 is fixedly provided at the other end of the support plate 12. The output end of the reduction motor 20 passes through the support plate 12 and is fixedly connected to the control gear 9. The reduction motor 20 periodically rotates forward and reversely to drive the rotating circular plate 16 to reciprocate.

[0057] The control motor 13 is fixedly mounted on the end of the sliding plate 18 . The output end of the control motor 13 passes through the sliding plate 18 and is fixedly connected to the cutting blade 17 .

[0058] The opposite side walls of the V-shaped clamp 30 are fixed with lifting plates 33 which are vertically slidably connected to the inner wall of the movable plate 29. Two double-threaded screw rods 32 which are rotatably arranged along a plumb line are arranged in the rectangular groove 31. The two double-threaded screw rods 32 are located on the left and right sides of the V-shaped clamp 30. The two ends of the double-threaded screw rods 32 pass through the two lifting plates 33 respectively and are threadedly connected to the lifting plates 33.

[0059] The two ends of the double-threaded screw rod 32 are rotatably connected to the inner top and inner bottom of the movable plate 29. The top ends of the two double-threaded screw rods 32 on the same movable plate 29 both pass through the movable plate 29 and are respectively fixed with the first driving wheel 27 and the first driven wheel 28. The first driving wheel 27 is connected to the first driven wheel 28 through the first transmission belt 42.

[0060] The second driving motor 26 is fixedly mounted on the moving plate 29 , and an output end of the second driving motor 26 is fixedly connected to the first driving wheel 27 .

[0061] Two sliding blocks 35 are arranged on the top of the workbench 1 for horizontal sliding. The two sliding blocks 35 are also arranged for synchronous sliding. The two sliding blocks 35 are fixedly connected to the two movable plates 29 via connecting rods 34 .

[0062] A fixed plate 37 is fixed on the top of the workbench 1, and two single-thread screws 36 are arranged at the end of the support plate 12 and are rotatably arranged along a horizontal line. One end of the two single-thread screws 36 passes through two sliding blocks 35 in turn and is rotatably connected to the fixed plate 37. The single-thread screws 36 are threadedly connected to the sliding blocks 35.

[0063] One end of the two single-thread screws 36 passes through the fixing plate 37 and is fixedly connected to a second driving wheel 38 and a second driven wheel 41 , respectively. The second driving wheel 38 is connected to the second driven wheel 41 via a second transmission belt 40 .

[0064] A third drive motor 39 is fixedly mounted on the fixing plate 37 , and an output end of the third drive motor 39 is fixedly connected to the second drive wheel 38 .

[0065] Three support rods 8 are fixedly provided on the top of the workbench 1 , and three fixed arc plates 7 are fixedly connected to the three support rods 8 correspondingly.

[0066] Two telescopic cylinders 6 are fixedly provided on the top of the workbench 1 , and the telescopic ends of the telescopic cylinders 6 are fixedly connected to the lifting arc plate 5 .

[0067] The working principle of this device is:

[0068] When cutting the pipe 2, the pipe 2 is placed on the fixed arc plate 7, and the two second drive motors 26 are started. The second drive motor 26 drives the first drive wheel 27, the first transmission belt 42, the first driven wheel 28 and the two double-threaded screws 32 to rotate, thereby driving the two V-shaped clamps 30 to slide relative to each other until the two V-shaped clamps 30 are both against the outer wall of the pipe 2. The pipe 2 can be clamped and fixed from the fixed arc plate 7 by the four V-shaped clamps 30 on the two movable plates 29. The two telescopic cylinders 6 are extended and drive the lifting arc plate 5 to rise until the inner wall of the lifting arc plate 5 is against the outer wall of the pipe 2. The first drive motor 23 drives the main gear 22, the driving inner gear ring 24 and the three drive gears 21 to rotate. Driven by the transmission shaft 25, the three The three driven gears 10 rotate synchronously, thereby controlling the three driven racks 19 and the three sliding plates 18 to slide toward the center of the circular groove 11 until the three cutting blades 17 are against the outer wall of the pipe 2, and the control motor 13 drives the cutting blade 17 to rotate. At the same time, the reduction motor 20 periodically rotates forward and reverse, thereby driving the control gear 9, the driven outer gear ring 15, the rotating tube 14 and the rotating circular plate 16 to reciprocate, thereby driving the three cutting blades 17 to reciprocate, and then cutting the pipe 2. After the cutting of the pipe 2 is completed, the operator takes the cut pipe 2 on the lifting arc plate 5, realizing the function of automatically and quickly cutting pipes 2 of different diameters, and the end of the pipe 2 after cutting is flat, which improves the cutting efficiency of the pipe 2;

[0069] When the pipe 2 is cut continuously, after the first cutting of the pipe 2 is completed through the above operation, the first drive motor 23 is started to rotate in the opposite direction, thereby controlling the three cutting blades 17 to slide away from the center of the circular groove 11 until the three cutting blades 17 are reset, and at the same time, the two second drive motors 26 are started to rotate in the opposite direction. Driven by the second drive motors 26, the two V-shaped clamping blocks 30 in each movable plate 29 slide relative to each other until the pipe 2 abuts against the fixed arc plate 7, and the third drive motor 39 is started. The third drive motor 39 drives the second drive wheel 38, the second transmission belt 40, the second driven wheel 41 and the two single-thread screws 36 to rotate, thereby driving the two sliding blocks 35 to move in the direction away from the support plate 12, and the movable plate 29 moves a distance When the distance is the same as the cutting length of the pipe 2, the third drive motor 39 is turned off, and the second drive motor 26 is started to rotate. The V-shaped clamps 30 in the two movable plates 29 clamp the pipe 2 again, and the third drive motor 39 is started to rotate in the opposite direction. The movable plate 29 drives the pipe 2 to move toward the direction close to the support plate 12 until the movable plate 29 is reset, and the three cutting blades 17 are controlled by the first drive motor 23 to slide toward the center of the circular groove 11 again until the three cutting blades 17 are against the outer wall of the pipe 2, and the pipe 2 is cut for the second time. Similarly, the above operation can be repeated to continuously cut the pipe 2, thereby realizing the function of continuously cutting pipes 2 of different diameters, and the cutting process is simple, the cutting efficiency is high, and the practicability of the equipment is improved.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A pipe cutting device for municipal engineering construction, characterized in that: The invention comprises a workbench (1), wherein two limit assemblies (3) and a cutting assembly (4) are sequentially arranged on the top of the workbench (1) along the moving direction of the pipeline (2). The cutting component (4) can automatically and quickly cut pipes (2) of different diameters, and the ends of the pipes (2) after cutting are flat; the limiting component (3) can clamp pipes (2) of different diameters and quickly transport the pipes (2) to the cutting component (4); The cutting assembly (4) comprises a vertically arranged rotating circular plate (16), the end of the rotating circular plate (16) being penetrated by a circular groove (11) coaxially arranged therewith, the end of the rotating circular plate (16) being evenly distributed with three sliding plates (18) along its circumference, the three sliding plates (18) being synchronously slidably arranged along the radial direction of the rotating circular plate (16), the end of the sliding plate (18) located in the circular groove (11) being provided with a cutting blade (17) rotatably arranged along a horizontal line, The rotating circular plate (16) is also arranged to reciprocate along its axis. When the pipe (2) is clamped by two limit assemblies (3), the pipe (2) and the rotating circular plate (16) are coaxial. The three sliding plates (18) slide until the cutting blade (17) abuts against the outer wall of the pipe (2). When the rotating circular plate (16) reciprocates, the cutting blade (17) cuts the pipe (2).

2. The pipe cutting device for municipal engineering construction according to claim 1 is characterized in that: The limiting assembly (3) comprises a vertically arranged movable plate (29), an end of the movable plate (29) being penetrated by a rectangular groove (31), two V-shaped clamping blocks (30) being arranged vertically in opposite directions in the rectangular groove (31), the two V-shaped clamping blocks (30) being symmetrically arranged along the axial section of the rotating circular plate (16), and the two V-shaped clamping blocks (30) being arranged to slide towards or relative to each other, The movable plate (29) is also arranged to slide horizontally, and three fixed arc plates (7) are arranged horizontally and in parallel above the workbench (1), the inner walls of the fixed arc plates (7) are arranged upward, and the three fixed arc plates (7) and the two movable plates (29) are arranged alternately; When the V-shaped clamping blocks (30) on the two movable plates (29) slide towards each other until they abut against the outer wall of the pipe (2), the pipe (2) placed on the fixed arc plate (7) is clamped and fixed, and when the two movable plates (29) move in a direction close to the cutting blade (17), the pipe (2) is transported.

3. A pipe cutting device for municipal engineering construction according to claim 2, characterized in that: A lifting arc plate (5) is provided on the top of the workbench (1) for vertical lifting, the inner wall of the lifting arc plate (5) is arranged upward, and the lifting arc plate (5) and the rotating circular plate (16) are arranged front and back along the moving direction of the pipeline (2). When the pipe (2) is cut, the inner wall of the lifting arc plate (5) abuts against the outer wall of the pipe (2), and the lifting arc plate (5) can prevent the pipe (2) from falling after being cut.

4. The pipe cutting device for municipal engineering construction according to claim 3 is characterized in that: The ends of the sliding plate (18) are fixedly provided with driven racks (19), and the ends of the rotating circular plate (16) are evenly distributed along the circumference thereof with three driven gears (10) which are arranged to rotate synchronously, and the three driven gears (10) are correspondingly meshed with the three driven racks (19).

5. The pipe cutting device for municipal engineering construction according to claim 4 is characterized in that: A support plate (12) is vertically fixed on the top of the workbench (1), and a rotating tube (14) is coaxially fixed to the other end of the rotating circular plate (16), and one end of the rotating tube (14) passes through the support plate (12) and is rotatably connected to the support plate (12).

6. The pipe cutting device for municipal engineering construction according to claim 5, characterized in that: The ends of the driven gears (10) are fixedly connected to a transmission shaft (25), one end of the transmission shaft (25) passes through the rotating circular plate (16) and is fixedly connected to a driving gear (21), the transmission shaft (25) is rotatably connected to the rotating circular plate (16), a driving internal gear ring (24) rotatably connected to the inner wall of the rotating tube (14) is coaxially provided inside the rotating tube (14), and the driving gears (21) are meshed with the driving internal gear ring (24).

7. The pipe cutting device for municipal engineering construction according to claim 6, characterized in that: A driven external gear ring (15) is fixedly sleeved on the outer wall of the rotating tube (14), and a control gear (9) meshing with the driven external gear ring (15) is rotatably provided at the end of the supporting plate (12).

8. The pipe cutting device for municipal engineering construction according to claim 7, characterized in that: The opposite side walls of the V-shaped clamp (30) are fixedly provided with lifting plates (33) vertically slidably connected to the inner wall of the movable plate (29); two double-threaded screw rods (32) rotatably arranged along a plumb line are arranged in the rectangular groove (31); the two double-threaded screw rods (32) are located on the left and right sides of the V-shaped clamp (30); the two ends of the double-threaded screw rods (32) respectively pass through the two lifting plates (33) and are threadedly connected to the lifting plates (33).

9. The pipe cutting device for municipal engineering construction according to claim 8, characterized in that: Two sliding blocks (35) are arranged horizontally and slideably on the top of the workbench (1). The two sliding blocks (35) are also arranged to slide synchronously. The two sliding blocks (35) are fixedly connected to the two movable plates (29) via connecting rods (34).

10. The pipe cutting device for municipal engineering construction according to claim 9, characterized in that: Two telescopic cylinders (6) are fixedly provided on the top of the workbench (1), and the telescopic ends of the telescopic cylinders (6) are fixedly connected to the lifting arc plate (5).

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