Pipeline cutting device

Abstract

The utility model provides a pipeline cutting device in the technical field of pipeline cutting, which comprises a support, a cutting mechanism is arranged on the support, the cutting mechanism comprises a mounting plate, a cutting motor and a saw blade, a connecting frame is arranged on the support, the mounting plate is rotatably connected with the support through the connecting frame, the cutting motor is arranged on the mounting plate, and the saw blade is connected with a cutting motor shaft. The inner side of the saw blade is close to the edge of the mounting plate, the pipeline positioning mechanism comprises a fixed frame, a transmission mechanism, a transmission motor and a movable frame, the fixed frame is arranged above the support, and the two ends of the top of the fixed frame are rotationally connected with two driving rollers which are connected end to end. And meanwhile, the saw blade is stressed uniformly, and the problems that the saw blade is damaged and cracked are solved.

Description

Technical Field

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

[0002] In pipeline installation projects, the pipeline cutting process is an indispensable construction process, which will directly affect the construction quality of the pipeline installation. At the least, it will affect the straightness of the pipeline installation or the quality of the subsequent construction process, such as the quality of the threading or the quality of the welding pipe. At worst, it will directly affect the installation quality of the pipeline, and the interface will often leak or the interface connection construction cannot be carried out at all.

[0003] Chinese Patent No.: ZL202322369149.4 discloses a municipal drainage pipe cutting machine, including a machine tool, a lifting seat is arranged on the top of the machine tool, one end of the lifting seat is connected to the rotating bracket, when the lifting seat is started to telescopically move, the rotating bracket is pushed to rotate and unfold, thereby driving the telescopic column to rise or fall, changing the height distance of the rotating component, and controlling the height distance between the cutter and the cutting wheel; the cutting wheel can be rotated in the horizontal direction by the rotating component, and the cutting direction of the cutting wheel can be changed, so that the cutting wheel reaches an ideal cutting position, and in addition, the slider is moved and rotated inside the machine tool by moving the clamp, so that the inner side of the clamp changes direction so as to better fit and fix the outer side of the pipe, which is beneficial to fix the special-shaped pipe, improves the convenience of use, and also avoids the situation that the pipe deviates during the cutting process. However, this technical solution can only fix pipes of the same size before cutting. When cutting pipes of different diameters, it is necessary to replace the clamps of the corresponding size first. In the process of clamping the pipe, it is necessary to tighten the two clamps on both sides of the cutting wheel in turn, which is inconvenient to use and time-consuming and laborious to fix the pipe. Secondly, the slider for installing the clamp in this technical solution slides in the annular groove on the machine tool. Due to the lack of a fixing device, the pipe and the clamp may move along the annular groove as a whole during the cutting process, resulting in cutting quality problems such as tilting of the incision after cutting the pipe or burrs on the incision. Summary of the invention

[0004] The technical problem to be solved by the utility model is how to fix pipes of different diameters without affecting the cutting effect, and how to avoid quality problems such as inclination or burrs on the pipe cut. The utility model aims to provide a pipe cutting device which can limit the pipes of different diameters by limiting the pipes from both sides of the bottom and the top of the pipe at the same time, and can drive the pipes to rotate actively and slowly, so that the cuts after the pipes are cut are smooth and flat.

[0005] The technical scheme adopted by the utility model is: a pipeline cutting device, comprising a bracket, a cutting mechanism is arranged on the bracket, the cutting mechanism comprises a mounting plate, a cutting motor and a saw blade, a connecting frame is arranged on the bracket, the mounting plate is rotatably connected with the bracket through the connecting frame, a cutting motor is arranged on the mounting plate, the saw blade is connected with the cutting motor shaft, the inner side of the saw blade is close to the edge of the mounting plate, and also comprises a pipeline positioning mechanism, the pipeline positioning mechanism comprises a fixed frame, a transmission mechanism, a transmission motor and a movable frame, the fixed frame is arranged above the bracket, two active rollers connected end to end are rotatably connected at both ends of the top of the fixed frame, the virtual symmetry line between the two active rollers and the inner side of the saw blade are mutually overlapped, and the active roller is connected to the transmission motor through the transmission mechanism; a support plate is arranged on one side of the top of the bracket, two sliding rods respectively arranged at both ends of the fixed frame are fixedly connected between the support plate and the fixed frame, and the two ends of the movable frame are slidably connected with the two sliding rods; both ends of the top of the movable frame are rotatably connected with a limiting roller, the diameter of the limiting roller is the same as the diameter of the active roller and is parallel to the active roller, the bracket is also fixedly connected with a mounting frame above, and an upper pressing plate and a first cylinder are arranged in the mounting frame.

[0006] The following beneficial effects can be achieved by using the pipe cutting device provided by the utility model:

[0007] (1) The bottom of the pipe is supported by the active roller and the limit roller, and the distance between the limit roller and the active roller can be adjusted by the screw rod, so that pipes of different diameters can be supported and the cutting quality problems such as the incision tilting or burrs on the incision can be prevented due to the deviation of the pipe during cutting.

[0008] (2) The transmission motor drives the active roller to rotate through the transmission mechanism. During the process of cutting the pipe, it can drive the pipe to rotate slowly. Combined with the active roller and the limit roller, the freedom of the pipe is limited, so that the pipe can rotate but not move, preventing the pipe from jumping, thereby ensuring that the pipe cut is neat and convenient for subsequent processing, and also speeding up the cutting speed.

[0009] (3) The saw blade is only used to cut the pipe on one side above the pipe, and the cylinder drives the lower pressure plate to limit the top of the pipe. When cutting, it is only necessary to cut down the distance of the corresponding thickness of the pipe. The saw blade is always in contact with only one side of the pipe, so that the force on the saw blade is evenly distributed, preventing the saw blade from cracking.

[0010] Preferably, the support plate is further provided with a threaded hole, a screw rod is provided in the middle of the movable frame, one end of the screw rod is loosely fitted and clamped with the movable frame, and the other end extends out of the outside of the bracket after passing through the threaded hole, and the screw rod is threadedly connected to the threaded hole.

[0011] The freedom of the screw rod is limited by the threaded holes on the support plate and the support rod. When the screw rod rotates, it is restricted by the threaded holes so that the distance between the end of the screw rod and the support plate also changes, that is, the distance between the threaded holes and the connection between the screw rod and the movable frame changes, thereby achieving the purpose of adjusting the distance between the movable frame and the fixed frame.

[0012] Preferably, the end of the screw rod away from the movable frame is fixedly connected with a hand wheel.

[0013] The screw rod is driven to rotate by turning the hand wheel, thereby facilitating the adjustment of the position of the movable frame to support pipes of different diameters.

[0014] Preferably, limit grooves are provided on both sides of the mounting frame, and the two ends of the upper pressure plate are respectively arranged in the two limit grooves in the mounting frame and are slidably connected to the mounting frame; one end of the first cylinder is fixedly connected to the top of the mounting frame, and the other end is fixedly connected to the top of the upper pressure plate.

[0015] The upper pressing plate is arranged in the limit grooves on both sides of the mounting frame to facilitate the upper pressing plate to move up and down in the mounting frame, and the upper pressing plate is driven to move by the cylinder. When cutting, the upper pressing plate can be clamped on the pipeline from above the pipeline by the cylinder.

[0016] Preferably, two rollers arranged side by side are provided at both ends of the bottom of the upper pressure plate, both ends of the rollers are rotatably connected to the two sides of the upper pressure plate and the rollers and the active rollers are parallel to each other, a slide plate is provided at the bottom between the two rollers, both ends of the slide plate are fixedly connected to the upper pressure plate, and an annular belt is also provided in the upper pressure plate, the two rollers and the slide plate are arranged on the inner side of the annular belt, and the belt is supported by the two rollers to keep the upper and lower sides straight and parallel to each other.

[0017] The two rollers support the inner ends of the belt, and the slide supports the lower surface of the belt, which can prevent the belt from sinking inward during rotation. The lower pressure plate clamps the top of the pipe to prevent the belt from sinking inward, so that the active roller and the limit roller can continuously clamp the pipe without affecting the synchronous rotation of the belt with the pipe, and most pipes of different diameters can be clamped from the top.

[0018] Preferably, a limiting roller is provided on one end of the bracket close to the mounting frame, the upper surface of the limiting roller is lower than the upper surface of the active roller, and the limiting roller and the active roller are perpendicular to each other.

[0019] The limiting roller can distinguish the direction of the pipeline entering, and at the same time limit the bottom of the pipeline to prevent the small-diameter pipeline from falling under the active roller and the limiting roller after being placed, resulting in the active roller and the limiting roller being unable to support the pipeline from the bottom of the pipeline after the movable frame moves.

[0020] Preferably, a slide groove is provided on the top of the mounting plate, and a mounting seat is fixedly connected to the bottom of the cutting motor. The mounting seat is arranged in the slide groove and is slidably connected to the slide groove. A positioning groove is provided on the side of the mounting seat away from the saw blade, and a positioning bolt is threadedly connected on the slide groove on the side away from the saw blade, and the end of the positioning bolt faces the bottom of the positioning groove.

[0021] The position of the cutting motor can be easily adjusted through the slide groove to adapt to pipes of different diameters so that the cutting disc is always located directly above the pipe to be cut; the adjusted cutting motor can be easily locked through the positioning bolt. After adjusting the position of the cutting motor, the pressure of the end of the positioning bolt on the positioning groove can prevent the installation seat from shifting.

[0022] Preferably, a cross bar is provided in the middle of the bracket, a second cylinder is provided between the cross bar and the mounting plate, one end of the second cylinder is rotatably connected to the bottom of the mounting plate, the other end of the second cylinder is rotatably connected to the top of the cross bar, and a through hole is provided on the bracket for the second cylinder to swing.

[0023] The extension and retraction of the second cylinder can drive the mounting plate to flip over. When the second cylinder contracts, it pulls the mounting plate to flip downward, driving the saw blade to move downward for cutting. The position of the saw blade is controlled by the extended length of the second cylinder, thereby controlling the cutting depth of the saw blade. When the second cylinder extends, it pushes the mounting plate to flip upward, driving the saw blade to move upward, thereby facilitating the movement of the pipeline.

[0024] Preferably, a saw blade guard is provided on the outer surface of the saw blade side, and the saw blade guard is fixedly connected to the cutting motor.

[0025] The saw blade guard can shield and collect sparks or debris generated when cutting the pipe to prevent danger, and prevent the debris from flying everywhere and affecting the accuracy of the equipment.

[0026] Preferably, the bracket is further provided with a limiting rod, and the limiting rod is arranged at the bottom of the mounting plate.

[0027] The limit can prevent the mounting plate from rotating excessively downward, thereby preventing the saw blade from cutting the connecting shaft between the two active rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the utility model in the main viewing direction;

[0030] Figure 2 It is the front view of the utility model;

[0031] Figure 3 It is a three-dimensional structural schematic diagram of the utility model in the rear view direction;

[0032] Figure 4 It is a rear view of the utility model;

[0033] Figure 5 It is a top view of the utility model;

[0034] Figure 6 This utility model Figure 5 Sectional view at AA in the middle;

[0035] Figure 7 This utility model Figure 5 Sectional view at the middle BB;

[0036] Figure 8 This utility model Figure 5 Cross-sectional view at CC.

[0037] Figure markings: 1- bracket, 12- limiting roller, 13- mounting frame, 14- supporting plate, 15- connecting frame, 16- cross bar, 2- pipeline positioning mechanism, 21- fixing frame, 211- driving roller, 212- transmission mechanism, 213- transmission motor, 22- movable frame, 221- limiting roller, 222- screw rod, 223- sliding rod, 224- threaded hole, 225- handwheel, 23- upper pressure plate, 231- roller, 232- sliding plate, 233- belt, 234- limiting groove, 235- first cylinder, 3- cutting mechanism, 31- mounting plate, 311- sliding groove, 32- mounting seat, 321- cutting motor, 322- positioning groove, 323- positioning bolt, 33- saw blade, 331- saw blade guard, 34- limiting rod, 35- second cylinder. DETAILED DESCRIPTION

[0038] The following will be combined with the attached Figure 1-8 The technical solution of the utility model is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Example 1

[0041] The following is further described in conjunction with specific embodiments. Figure 1-8 As shown, this embodiment is a pipe cutting device, including a bracket 1, on which a cutting mechanism 3 is provided, the cutting mechanism 3 includes a mounting plate 31, a cutting motor 321 and a saw blade 33, a connecting frame 15 is provided on the bracket 1, the mounting plate 31 is rotatably connected to the bracket 1 through the connecting frame 15, a cutting motor 321 is provided on the mounting plate 31, the saw blade 33 is connected to the axis of the cutting motor 321, and the inner side of the saw blade 33 is close to the edge of the mounting plate 31; it also includes a pipe positioning mechanism 2, the pipe positioning mechanism 2 includes a fixed frame 21, a transmission mechanism 212, a transmission motor 213 and a movable frame 22, the fixed frame 21 is arranged above the bracket 1, and two active rollers 211 connected end to end are rotatably connected at both ends of the top of the fixed frame 21, the virtual symmetry line between the two active rollers 211 coincides with the inner side of the saw blade 33, and the active roller 211 is transmission-connected to the transmission motor 213 through the transmission mechanism 212; a support plate 14 is provided on one side of the top of the bracket 1, and the support plate 14 and the fixed frame 21 are connected between the support plate 14 and the fixed frame 21 Two sliding rods 223 are fixedly connected and are respectively arranged at the two ends of the fixed frame 21, and the two ends of the movable frame 22 are slidably connected to the sliding rods 223; the two ends of the top of the movable frame 22 are rotatably connected with the limiting rollers 221, and the diameter of the limiting rollers 221 is the same as the diameter of the active roller 211 and is parallel to the active roller 211. The bracket 1 is also fixedly connected with the mounting frame 13 above, and the mounting frame 13 is provided with an upper pressure plate 23 and a first cylinder 235. The bottom of the pipeline is supported by the active roller 211 and the limiting roller 221, and the distance between the limiting roller 221 and the active roller 211 is adjusted by the screw rod 222, so that the pipelines with different diameters can be supported. In combination with the transmission motor 213 to drive the active roller 211 to rotate, the pipeline can be driven to rotate slowly during the cutting process, avoiding quality problems such as inclination of the incision or burrs and deformation, making the incision of the pipeline smooth and smooth, which is convenient for subsequent processing, and also speeds up the cutting speed, makes the saw blade 33 evenly stressed, and prevents the saw blade 33 from cracking.

[0042] Reference Figure 6As shown, in the present embodiment, a threaded hole 224 is further provided on the support plate 14, and a screw rod 222 is provided in the middle of the movable frame 22, one end of the screw rod 222 is loosely fitted and clamped with the movable frame 22, and the other end extends out of the outside of the bracket 1 after passing through the threaded hole 224, and the screw rod 222 is threadedly connected with the threaded hole 224, and the threaded holes 224 on the support plate 14 and the support rod limit the degree of freedom of the screw rod 222. When the screw rod 222 rotates, it is restricted by the threaded hole 224 so that the distance between the end of the screw rod 222 and the support plate 14 changes, that is, the distance between the threaded hole 224 and the connection between the screw rod 222 and the movable frame 22 changes, thereby achieving the purpose of adjusting the distance between the movable frame 22 and the fixed frame 21.

[0043] Reference Figure 1 As shown, in this embodiment, the end of the screw rod 222 away from the movable frame 22 is fixedly connected to a hand wheel 225, and the screw rod 222 is driven to rotate by rotating the hand wheel 225, so as to facilitate the adjustment of the position of the movable frame 22 and support pipes of different diameters.

[0044] Reference Figure 1 or Figure 3 or Figure 8 As shown, in this embodiment, both sides of the mounting frame 13 are provided with limit grooves 234, and the two ends of the upper pressure plate 23 are respectively arranged in the two limit grooves 234 in the mounting frame 13 and are slidably connected to the mounting frame 13; one end of the first cylinder 235 is fixedly connected to the top of the mounting frame 13, and the other end is fixedly connected to the top of the upper pressure plate 23. By arranging the upper pressure plate 23 in the limit grooves 234 on both sides of the mounting frame 13, it is convenient for the upper pressure plate 23 to move up and down in the mounting frame 13, and the first cylinder 235 is used to drive the upper pressure plate 23 to move. During cutting, the first cylinder 235 can be used to clamp the pipe from above the pipe.

[0045] Reference Figure 1 or Figure 8As shown, in this embodiment, two rollers 231 arranged side by side are provided at both ends of the bottom of the upper pressing plate 23, and both ends of the rollers 231 are rotatably connected to both sides of the upper pressing plate 23 and the rollers 231 are parallel to the active roller 211. A slide plate 232 is provided at the bottom between the two rollers 231, and both ends of the slide plate 232 are fixedly connected to the upper pressing plate 23. An annular belt 233 is also provided in the upper pressing plate 23. The two rollers 231 and the slide plate 232 are both arranged on the inner side of the annular belt 233. The belt 233 is supported by the two rollers 231 to The upper and lower sides remain straight and parallel to each other, and the two rollers 231 are used to support the two ends of the inner side of the belt 233, and the slide plate 232 is used to support the lower surface of the belt 233, which can prevent the belt 233 from deforming or displacing during rotation. When the upper pressure plate 23 clamps the top of the pipe, it can prevent the belt 233 from sinking inward, so that the active roller 211 and the limiting roller 221 can be combined to continuously clamp the pipe without affecting the synchronous rotation of the belt 233 with the pipe, and most pipes of different diameters can be clamped from the top.

[0046] Reference Figure 1 or Figure 5 As shown, in this embodiment, a limiting roller 12 is provided at one end of the bracket 1 close to the mounting frame 13, and the upper surface of the limiting roller 12 is lower than the upper surface of the active roller 211 and the limiting roller 12 and the active roller 211 are perpendicular to each other. The limiting roller 12 distinguishes the direction in which the pipeline enters, and can also limit the bottom of the pipeline to prevent the small-diameter pipeline from falling below the active roller 211 and the limiting roller 221 after being placed, resulting in the active roller 211 and the limiting roller 221 being unable to support the pipeline from below the pipeline after the movable frame 22 moves.

[0047] Reference Figure 3 , Figure 5 or Figure 7 As shown, in the present embodiment, a slide groove 311 is provided on the top of the mounting plate 31, and a mounting seat 32 is fixedly connected to the bottom of the cutting motor 321. The mounting seat 32 is arranged in the slide groove 311 and is slidably connected to the slide groove 311. A positioning groove 322 is provided on the side of the mounting seat 32 away from the saw blade 33, and a positioning bolt 323 is threadedly connected on the slide groove 311 on the side away from the saw blade 33. The end of the positioning bolt 323 faces the bottom of the positioning groove 322. The position of the cutting motor 321 can be easily adjusted through the slide groove 311 to adapt to pipes of different diameters so that the saw blade 33 is always located directly above the pipe to be cut; the positioning bolt 323 can be used to lock the adjusted cutting motor 321. After adjusting the position of the cutting motor 321, the pressure of the end of the positioning bolt 323 on the positioning groove 322 can prevent the mounting seat 32 from being displaced.

[0048] Reference Figure 2-4As shown, in this embodiment, a cross bar 16 is provided in the middle of the bracket 1, and a second cylinder 35 is provided between the cross bar 16 and the mounting plate 31, one end of the second cylinder 35 is rotatably connected to the bottom of the mounting plate 31, and the other end of the second cylinder 35 is rotatably connected to the top of the cross bar 16. A through hole for the second cylinder 35 to swing is provided on the bracket 1, and the mounting plate 31 can be driven to flip through the extension and contraction of the second cylinder 35. When the second cylinder 35 contracts, the mounting plate 31 is pulled to flip downward, and the saw blade 33 is driven to move downward for cutting. The position of the saw blade 33 is controlled by the length of the second cylinder 35 after extension, thereby controlling the cutting depth of the saw blade 33; when the second cylinder 35 is extended, the mounting plate 31 is pushed to flip upward, and the saw blade 33 is driven to move upward, so as to facilitate the movement of the pipeline.

[0049] Reference Figure 4 machine Figure 7 As shown, in this embodiment, a saw blade guard 331 is provided on the outer surface of the saw blade 33, and the saw blade guard 331 is fixedly connected to the outer surface of the cutting motor 321. The saw blade guard 331 can shield and collect sparks and debris generated when cutting the pipe to prevent danger, and at the same time prevent debris from splashing everywhere and affecting the accuracy of the equipment.

[0050] Reference Figure 2 or Figure 4 As shown, in this embodiment, a limit rod 34 is also provided on the bracket 1, and the limit rod 34 is set at the bottom of the mounting plate 31. The limit rod 34 can prevent the mounting plate 31 from rotating downward excessively, thereby preventing the saw blade 33 from cutting the connecting shaft between the two active rollers 211.

[0051] Example 2

[0052] When using the utility model, the pipe to be cut is inserted from one end of the bracket 1 provided with the limiting roller 12 and the pipe is placed above the limiting roller 12. The hand wheel 225 is rotated according to the diameter of the pipe to be cut. The hand wheel 225 drives the screw rod 222 to rotate. The screw rod 222 cooperates with the threaded hole 224 on the support plate 14, so that the screw rod 222 is displaced along the axial direction of the screw rod 222 when it rotates, thereby driving the movable frame 22 clamped with the end of the screw rod 222 to move. By adjusting the position of the movable frame 22, the distance between the active roller 211 and the limiting roller 221 is changed, so as to support the bottom sides of pipes with different diameters, and then the mounting seat is adjusted according to the diameter of the pipe. The mounting seat 32 is positioned in the slide groove 311, and when the bottom of the saw blade 33 is aligned with the top of the pipe to be cut, the positioning bolt 323 is tightened to fix the position of the mounting seat 32, thereby fixing the cutting motor 321 on the mounting seat 32 and the vertical position of the saw blade 33 connected to the shaft of the cutting motor 321, and then the first cylinder 235 is started, and the first cylinder 235 drives the upper pressure plate 23 to move downward to clamp the top of the pipe to be cut. The active roller 211, the limiting roller 221 and the upper pressure plate 23 clamp the pipe, which can prevent the pipe from tilting, displacing or jumping during cutting, but does not affect the rotation of the pipe around its virtual central axis;

[0053] When cutting, the cutting motor 321, the transmission motor 213 and the second cylinder 35 are started. The second cylinder 35 pulls the mounting plate 31 to rotate downward around the connecting frame 15, thereby driving the cutting motor 321 to move the saw blade 33 driven by the cutting motor 321 to move downward at a high speed. After the saw blade 33 contacts the pipe during the movement, the pipe is cut by the saw blade 33. The position of the saw blade 33 is controlled by the length of the second cylinder 35 after extension, thereby controlling the cutting depth of the saw blade 33. At the same time, when the transmission motor 213 rotates, the driving roller 211 is driven to rotate slowly through the transmission mechanism 212. After the driving roller 211 rotates, it starts to drive the pipe to be cut that is in contact with the driving roller 211 to rotate slowly. Due to the limiting effect of the upper pressure plate 23 of the limiting roller 221, the position of the pipe does not change when it rotates, and it can only rotate around its virtual central axis, thereby realizing the slow rotation of one side of the pipe so that it can be cut by the saw blade 33 above.

[0054] During the cutting process, the belt 233 on the upper pressing plate 23 contacts the pipe, and the pipe is driven to rotate by the active roller 211, causing the belt 233 to rotate accordingly. The belt 233 is limited by the two rollers 231 on the inner ring of the belt 233, and the slide plate 232 on the inner ring of the belt 233 supports the bottom of the belt 233 to prevent the belt 233 from deforming due to force after contacting the pipe, so that when the upper pressing plate 23 presses down and clamps the top of the pipe from above, the belt 233 can always provide pressure on the top of the pipe under the action of the slide plate 232, while not affecting the rotation of the pipe;

[0055] Since the pipeline is restricted by the active roller 211 and the limiting roller 221 during the cutting process, the pipeline will not deviate during the rotation driven by the active roller 211, and can only rotate slowly around the virtual central axis of the pipeline itself, so that the relative position of the bottom of the saw blade 33 and the top of the pipeline remains unchanged when the saw blade 33 cuts the pipeline, and the uncut part is continuously and slowly rotated to the edge of the saw blade 33 through the rotation of the pipeline itself, thereby ensuring that the pipeline cut is smooth and flat. Since the position of the pipeline remains unchanged during the rotation process, and the cutting angle of the saw blade 33 remains unchanged, the saw blade 33 is subjected to uniform force during the cutting process, thereby preventing the saw blade 33 from being damaged and cracked, and extending the service life of the saw blade 33;

[0056] Due to the limitation of the limiting rod 34, the downward flipping angle of the mounting plate 31 on which the cutting motor 321 is installed is limited, thereby preventing the saw blade 33 from continuously cutting downward and damaging the equipment; after the pipeline cutting is completed, the cutting motor 321 and the transmission motor 213 are turned off, and the first cylinder 235 and the second cylinder 35 are retracted and reset, so that the position of the pipeline to be cut can continue to be moved toward the bottom of the saw blade 33 for the next cutting operation.

[0057] The directional terms mentioned in the present invention, such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0058] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art, and the machinery, parts and equipment all adopt conventional models in the prior art.

[0059] 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, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A pipe cutting device, comprising a bracket (1), a cutting mechanism (3) being arranged on the bracket (1), the cutting mechanism (3) comprising a mounting plate (31), a cutting motor (321) and a saw blade (33), a connecting frame (15) being arranged on the bracket (1), the mounting plate (31) being rotatably connected to the bracket (1) via the connecting frame (15), a cutting motor (321) being arranged on the mounting plate (31), the saw blade (33) being connected to the axis of the cutting motor (321), the inner side of the saw blade (33) being close to the edge of the mounting plate (31), characterized in that: The invention also comprises a pipeline positioning mechanism (2), the pipeline positioning mechanism (2) comprising a fixed frame (21), a transmission mechanism (212), a transmission motor and a movable frame (22), the fixed frame (21) being arranged above the bracket (1), two active rollers (211) being rotatably connected to the two ends of the top of the fixed frame (21), the virtual symmetry line between the two active rollers (211) being coincident with the inner side of the saw blade (33), the active rollers (211) being transmission-connected to the transmission motor (213) via the transmission mechanism (212); a support plate (211) is provided on one side of the top of the bracket (1) 14), two slide bars (223) are fixedly connected between the support plate (14) and the fixed frame (21), and the two ends of the movable frame (22) are respectively arranged at the two ends of the fixed frame (21), and the two ends of the movable frame (22) are slidably connected to the two slide bars (223); both ends of the top of the movable frame (22) are rotatably connected to the limiting rollers (221), and the diameter of the limiting roller (221) is the same as the diameter of the active roller (211) and is parallel to the active roller (211); the bracket (1) is also fixedly connected to the mounting frame (13), and the mounting frame (13) is provided with an upper pressure plate (23) and a first cylinder (235).

2. The pipe cutting device according to claim 1, characterized in that: The support plate (14) is also provided with a threaded hole (224), and a screw rod (222) is provided in the middle of the movable frame (22). One end of the screw rod (222) is loosely matched and clamped with the movable frame (22), and the other end passes through the threaded hole (224) and extends out of the outer side of the bracket (1). The screw rod (222) is threadedly connected to the threaded hole (224).

3. The pipe cutting device according to claim 2, characterized in that: The end of the screw rod (222) away from the movable frame (22) is fixedly connected to a hand wheel (225).

4. The pipe cutting device according to claim 1, characterized in that: Both sides of the even-numbered mounting frame (13) are provided with limit grooves (234), and the two ends of the upper pressing plate (23) are respectively arranged in the two limit grooves (234) in the mounting frame (13) and are slidably connected to the mounting frame (13); one end of the first cylinder (235) is fixedly connected to the top of the mounting frame (13), and the other end is fixedly connected to the top of the upper pressing plate (23).

5. The pipe cutting device according to claim 4, characterized in that: Two rollers (231) are arranged side by side at both ends of the bottom of the upper pressure plate (23), and both ends of the rollers (231) are rotatably connected to both sides of the upper pressure plate (23), and the rollers (231) and the active rollers (211) are parallel to each other. A slide plate (232) is arranged at the bottom between the two rollers (231), and both ends of the slide plate (232) are fixedly connected to the upper pressure plate (23). An annular belt (233) is also arranged on the upper pressure plate (23), and the two rollers (231) and the slide plate (232) are arranged on the inner side of the annular belt (233). The belt (233) is supported by the two rollers (231) so that the upper and lower sides are kept straight and parallel to each other.

6. The pipe cutting device according to claim 5, characterized in that: A limiting roller (12) is provided on one end of the bracket (1) close to the mounting frame (13); the upper surface of the limiting roller (12) is lower than the upper surface of the active roller (211), and the limiting roller (12) and the active roller (211) are perpendicular to each other.

7. The pipe cutting device according to claim 1, characterized in that: A slide groove (311) is provided on the top of the mounting plate (31), and a mounting seat (32) is fixedly connected to the bottom of the cutting motor (321). The mounting seat (32) is arranged in the slide groove (311) and is slidably connected to the slide groove (311). A positioning groove (322) is provided on the side of the mounting seat (32) away from the saw blade (33). A positioning bolt (323) is threadedly connected on the slide groove (311) on the side away from the saw blade (33), and the end of the positioning bolt (323) faces the bottom of the positioning groove (322).

8. The pipe cutting device according to claim 7, characterized in that: A cross bar (16) is provided in the middle of the bracket (1), a second cylinder (35) is provided between the cross bar (16) and the mounting plate (31), one end of the second cylinder (35) is rotatably connected to the bottom of the mounting plate (31), and the other end of the second cylinder (35) is rotatably connected to the top of the cross bar (16), and a through hole for the second cylinder (35) to swing is provided on the bracket (1).

9. The pipe cutting device according to claim 1, characterized in that: A saw blade protective cover (331) is provided on the outer surface of the saw blade (33), and the saw blade protective cover (331) is fixedly connected to the cutting motor (321).

10. The pipe cutting device according to claim 1, characterized in that: The bracket (1) is also provided with a limiting rod (34), and the limiting rod (34) is arranged at the bottom of the mounting plate (31).

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