CN117565125B - MPP power tube cutting device for power construction and use method thereof - Google Patents

Abstract

The invention relates to the technical field of cutting devices, and particularly discloses an MPP power tube cutting device for power construction and a use method thereof, wherein the MPP power tube cutting device comprises the following components: the two supporting plates are symmetrically arranged, the first rotating shafts are rotatably arranged on one sides of the two supporting plates, the same cutting box is fixedly arranged between the two first rotating shafts, a cutting mechanism is arranged in the cutting box and used for cutting the MPP pipe, and an adjusting mechanism is arranged on the two supporting plates and used for adjusting the cutting angle of the cutting mechanism.

Description

MPP power tube cutting device for power construction and use method thereof

Technical Field

The invention relates to the technical field of cutting devices, in particular to an MPP power tube cutting device for power construction and a using method thereof.

Background

MPP pipe is also called MPP power cable protection pipe, and is divided into excavation type and non-excavation type, MPP non-excavation pipe is also called MPP push pipe or drag pipe. The MPP pipe adopts modified polypropylene as a main raw material, and is suitable for medium and low voltage transmission line cable calandria pipes below 10 KV. At present, the MPP power tube is mainly used in the pipeline construction of power cables, communication, photoelectric optical cables, urban air supply, urban water supply and urban heating, can realize the horizontal directional construction without excavation, resists high temperature, can ensure that products at extremely high temperature cannot deform and crack, has good electric erosion resistance, and is energy-saving and environment-friendly.

In recent years, underground cables are becoming more and more popular for urban grid construction. After the construction of the buried line engineering is completed, the pipe orifice of the buried MPP pipeline is excessively long in reserved length, so that the pipe orifice is exposed and redundant MPP pipelines are required to be cut before underground cable laying. However, because a plurality of MPP cable pipelines are adjacent and relatively close, no proper operation space exists for external cutting by using a traditional cutting tool, the construction difficulty is high, and the cut pipe orifice is uneven. The traditional cutting machine is used for cutting in the pipe, and because the inner diameter of the pipe is too small, the arm is not flexible to operate in the pipe by using the cutting machine, meanwhile, constructors cannot observe the condition in the pipe, the cutting path cannot be controlled, and great potential safety hazards exist during operation.

Through retrieving, the invention patent application with publication number of CN116373000A discloses an inscribed cable conduit cutting device, including fixed stock, cutting assembly and interior supporting component, fixed stock includes cylinder sleeve, first pole and second pole, cylinder sleeve coaxial sleeve establishes on first pole, cylinder sleeve and first pole threaded connection, cutting assembly slidable cover is established on first pole, cutting assembly's direction of movement is parallel with the axis direction of first pole, when first pole and cylinder sleeve take place relative rotation, cutting assembly slides, first pole coaxial sleeve establishes on the second pole, first pole and second pole threaded connection, the one end of keeping away from cylinder sleeve on the first pole is provided with interior supporting component, when second pole and first pole take place relative movement, interior supporting component carries out supporting work to the inside of pipeline. The invention can adapt to the cutting work of pipelines with different inner diameters, can ensure the accuracy of a cutting path and reduce the potential safety hazard existing in the operation of the traditional cutting device.

However, the above design has the disadvantage that firstly, the above design realizes the function of rotary cutting inside the pipeline through the fixing sleeve and the cutting assembly, but the cutting assembly needs to cut along the whole circumference of the pipeline in a cutting mode of one circle around the inner wall of the pipeline, and the cutting path of one circle around the inner wall of the pipeline is longer, and more time is required to finish cutting, so that the cutting efficiency is lower;

secondly, the terminal surface of pipeline is according to the difference of service conditions, and the inclined plane may need to be cut to perhaps for the mouth of pipe is more easily inserted into the bell and spigot, improves stability and the efficiency of connection, and the unable regulation of cutting angle of above-mentioned design cutting assembly, thereby leads to unable cutting into the inclined plane with the pipeline terminal surface when needs, and then makes the application scope of device reduce.

Disclosure of Invention

The invention provides an MPP power pipe cutting device for power construction and a use method thereof, which solve the problems that in the prior art, the cutting path of a circle of cutting device around the inner wall of a pipeline is longer when the cutting device is used for cutting, more time is required for completing cutting, and the cutting efficiency is lower; and the end face of the pipeline cannot be cut into an inclined plane according to different installation requirements, so that the application range of the device is reduced.

According to an aspect of the present invention, there is provided an apparatus for cutting an MPP power pipe for power construction, including: the cutting device comprises two supporting plates, wherein the two supporting plates are symmetrically arranged, a first rotating shaft is rotatably arranged on one side, which is close to each other, of the two supporting plates, and the same cutting box is fixedly arranged between the two first rotating shafts;

the cutting mechanism comprises six arc plates, the right side of each arc plate is fixedly provided with the same fixed disc, six sliding grooves are formed in the fixed disc, the sliding grooves are arranged in an array mode by taking the circle center of the fixed disc as the center, sliding rods are connected in the sliding grooves in a sliding mode, the six sliding rods penetrate through the cutting box and extend to the outer side of the cutting box, and cutting blades are fixedly arranged on the six sliding rods.

Further: the cutting box is characterized in that the same second rotating shaft is rotatably arranged between the inner walls of the left side and the right side of the cutting box, the second rotating shaft penetrates through the fixed disc and is rotatably connected with the fixed disc, a poking disc is fixedly sleeved on the outer side of the second rotating shaft, six arc-shaped grooves are formed in the poking disc, poking rods are fixedly arranged on the inner sides of the six sliding rods, and the poking rods extend into the arc-shaped grooves.

Further: the left side inner wall of the cutting box is fixedly provided with a stirring motor, the outer side of an output shaft of the stirring motor is fixedly provided with a worm, the outer side of the second rotating shaft is fixedly sleeved with a worm wheel, and the worm is meshed with the worm wheel.

Further: the adjusting mechanism comprises three ball-head universal joints, first connecting rods are fixedly arranged on the left sides of the three ball-head universal joints, the three first connecting rods are arranged in an array by taking the circle center of the supporting plate as the center, telescopic rods are hinged to the left ends of the three first connecting rods, second connecting rods are hinged to the left ends of the three telescopic rods, and four driving wheels are rotatably arranged on the second connecting rods.

Further: the utility model discloses a ball cage type universal joint, including the backup pad, fixed mounting has ball cage type universal joint, fixed mounting has accommodate motor on the ball cage type universal joint, accommodate motor's output shaft outside fixed mounting has the screw rod, fixed mounting has the limiting plate on the screw rod, the outside threaded connection of screw rod has the set square, it has three third connecting rod to articulate on the set square, and the inboard of three second connecting rod is all fixed mounting has first articulated piece, the third connecting rod articulates with first articulated piece mutually.

Further: the outside fixed cover of accommodate motor is equipped with the installation cover, the outside fixed mounting of installation cover has three dead levers, and the left end of three dead levers has same fixed cover, fixed cover movable sleeve establishes in the outside of screw rod.

Further: the outside fixed cover fixed mounting has three cylinders, and the inboard of three first connecting rods is all fixed mounting has the second hinge piece, and the output of three cylinders is all fixed mounting has the articulated seat, articulated seat is articulated mutually with the second hinge piece.

Further: the two support plates are all rotated and installed to be close to one side each other and rotate the cover, and two are all rotated and are connected with the cutting box in two sides that are close to each other, and two support plates are all fixed mounting in one side that is close to each other, the bottom fixed mounting of fixed plate has driving motor.

Further: the driving bevel gear is fixedly arranged on the outer side of the output shaft of the driving motor, the driven bevel gear is fixedly sleeved on the outer side of the first rotating shaft, and the driving bevel gear is meshed with the driven bevel gear.

According to another aspect of the present invention, there is provided a method for using an MPP power pipe cutting device for power construction, comprising:

s1: firstly, place the device in the pipeline, then, remove to the cutting point in the pipeline through drive wheel device, then start two accommodate motor, accommodate motor's output shaft rotates and drives the screw rod and rotate, thereby can drive the set square and slide in the screw rod outside, make two set squares keep away from each other, the set square can promote three first articulated piece through the third connecting rod and remove in the in-process that removes, thereby can drive three second connecting rod and use the articulated department with the telescopic link to rotate as the center, and then make a plurality of drive wheels keep away from each other, until support with the inner wall of pipeline each other tightly, thereby accomplish the location to the device.

S2: then start driving motor, driving motor's output shaft rotates and drives drive bevel gear and driven bevel gear and mesh mutually, thereby can drive the rotation of the first axis of rotation that is located the left side, and then can drive the cutting case and rotate, make the cutting blade high-speed rotatory, when the blade is rotatory, start and stir the motor, stir the output shaft rotation of motor and drive worm and worm wheel and mesh mutually, thereby can drive and stir the dish rotation, and then can stir six driving levers through the arc wall outside slip in the spout, make six cutting blades outwards expand gradually, six cutting blades can contact with the inner wall of pipeline gradually in the in-process of outwards expanding, then cut the pipeline from inside to outside.

S3: when the cutting section of the pipeline is required to be cut into an inclined plane, the coplanar two cylinders are started, so that the output ends of the two cylinders are contracted, the output end contraction of the left cylinder can pull the left second hinge block to move inwards, so that the left first connecting rod is driven to rotate clockwise, and meanwhile, the left telescopic rod can rotate anticlockwise and gradually extend along with the continuous contraction of the output end of the left cylinder.

S4: meanwhile, the output end of the cylinder located on the right side contracts and can pull the second hinging block located on the right side to move towards the inner side, so that the first connecting rod located on the right side is driven to rotate clockwise, the telescopic rod located on the right side simultaneously rotates anticlockwise, and the telescopic rod continuously contracts and stretches gradually along with the output end of the cylinder located on the right side, in the process, the two supporting plates can drive the cutting box to rotate and deviate clockwise by a small amplitude, and therefore the cutting angle of the cutting mechanism is adjusted, and then the operation of cutting a cutting section of a pipeline into an inclined plane can be achieved, so that the application range of the device is remarkably improved.

The invention has the beneficial effects that:

through setting up cutting mechanism, when making the cutting blade rotate at a high speed, through stirring the dish rotation, drive six cutting blades and outwards expand gradually, six cutting blades can be contacted with the inner wall of pipeline gradually in the in-process of outwards expanding gradually, then cut the pipeline from inside to outside to can once only accomplish the cutting of pipeline, and then make the cutting efficiency of device obtain showing and improving;

through setting up adjustment mechanism for the device can be adjusted cutting blade's cutting angle as required, thereby can cut the inclined plane of certain inclination with the pipeline terminal surface, and then make the application scope of device improve by a wide margin.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an enlarged partial view of portion A of FIG. 1 in accordance with the present invention;

FIG. 3 is a partial perspective sectional view of the support plate of the present invention;

FIG. 4 is a partial perspective cross-sectional view of the swivel sleeve of the present invention;

FIG. 5 is a schematic view of a perspective view of a ball joint portion of the present invention;

FIG. 6 is a partial perspective cross-sectional view of the cutting box of the present invention;

FIG. 7 is a schematic perspective view of a portion of the drive wheel of the present invention;

FIG. 8 is a schematic view of a portion of a stop plate of the present invention;

FIG. 9 is an exploded view of a portion of the ball and socket joint of the present invention;

FIG. 10 is a schematic perspective view of a dial portion of the present invention;

FIG. 11 is an exploded view of a perspective view of a portion of a cutting blade of the present invention;

FIG. 12 is a schematic perspective view of a worm gear section of the present invention;

fig. 13 is a schematic diagram of the working principle of the present invention.

In the figure:

1. a support plate; 2. a first rotation shaft; 3. a cutting box; 6. a rotating sleeve; 7. a fixing plate; 8. a driving motor; 9. driving a bevel gear; 10. a driven bevel gear;

4. a cutting mechanism; 401. an arc-shaped plate; 402. a fixed plate; 403. a chute; 404. a slide bar; 405. a cutting blade; 406. a second rotation shaft; 407. a toggle plate; 408. an arc-shaped groove; 409. a deflector rod; 410. the motor is stirred; 411. a worm; 412. a worm wheel;

5. an adjusting mechanism; 501. ball-type universal joint; 502. a first link; 503. a telescopic rod; 504. a second link; 505. a limiting plate; 506. a triangle; 507. a third link; 508. a first hinge block; 509. a fixed rod; 510. a fixed sleeve; 511. a cylinder; 512. a second hinge block; 513. a hinge base; 514. a driving wheel; 515. adjusting a motor; 516. a screw; 517. ball and cage type universal joint; 518. and (5) installing a sleeve.

Detailed Description

The subject matter described herein will now be discussed with reference to example embodiments. It should be appreciated that these embodiments are discussed so that those skilled in the art will better understand and realize the subject matter described herein. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure as set forth in the specification. Various examples may omit, replace, or add various procedures or components as desired. In addition, features described with respect to some examples may be combined in other examples as well.

Referring to fig. 1 and 4, in this embodiment, an MPP power pipe cutting device for power construction is provided, including: the MPP pipe cutting device is characterized in that a cutting mechanism 4 is arranged in the cutting box 3, the cutting mechanism 4 is used for cutting the MPP pipe, adjusting mechanisms 5 are arranged on the two support plates 1, and the adjusting mechanisms 5 are used for adjusting the cutting angle of the cutting mechanism 4;

the cutting mechanism 4 comprises six arc plates 401, the same fixed disk 402 is fixedly arranged on the right side of the six arc plates 401, six sliding grooves 403 are formed in the fixed disk 402, the sliding grooves 403 are arranged in an array by taking the center of the circle of the fixed disk 402 as the center, sliding rods 404 are connected in a sliding mode in the sliding grooves 403, the six sliding rods 404 penetrate through the cutting box 3 and extend to the outer side of the cutting box, and cutting blades 405 are fixedly arranged on the six sliding rods 404.

Referring to fig. 3, 6, 10 and 11, in this embodiment, a second rotating shaft 406 is rotatably installed between the inner walls of the left and right sides of the cutting box 3, the second rotating shaft 406 penetrates through the fixed disc 402 and is rotatably connected with the fixed disc 402, a toggle disc 407 is fixedly sleeved on the outer side of the second rotating shaft 406, six arc-shaped grooves 408 are formed in the toggle disc 407, a toggle lever 409 is fixedly installed on the inner sides of the six sliding rods 404, and the toggle lever 409 extends into the arc-shaped grooves 408.

Referring to fig. 4 and 12, in this embodiment, a toggle motor 410 is fixedly installed on the left inner wall of the cutting box 3, a worm 411 is fixedly installed on the outer side of an output shaft of the toggle motor 410, a worm wheel 412 is fixedly sleeved on the outer side of the second rotating shaft 406, and the worm 411 is meshed with the worm wheel 412.

Referring to fig. 1 and 2, in this embodiment, the adjusting mechanism 5 includes three ball-and-socket universal joints 501, the left sides of the three ball-and-socket universal joints 501 are fixedly provided with first connecting rods 502, the three first connecting rods 502 are arranged in an array with the center of the circle of the supporting plate 1 as the center, the left ends of the three first connecting rods 502 are hinged with telescopic rods 503, the left ends of the three telescopic rods 503 are hinged with second connecting rods 504, and four driving wheels 514 are rotatably installed on the second connecting rods 504.

Referring to fig. 3, 5 and 9, in this embodiment, a ball cage type universal joint 517 is fixedly installed on the supporting plate 1, an adjusting motor 515 is fixedly installed on the ball cage type universal joint 517, the ball cage type universal joint 517 can provide support for the adjusting motor 515 and enable the adjusting motor 515 to deflect, a screw 516 is fixedly installed on the outer side of an output shaft of the adjusting motor 515, a limiting plate 505 is fixedly installed on the screw 516, a triangle 506 is in threaded connection with the outer side of the screw 516, three third connecting rods 507 are hinged on the triangle 506, first hinging blocks 508 are fixedly installed on the inner sides of the three second connecting rods 504, and the third connecting rods 507 are hinged with the first hinging blocks 508.

Referring to fig. 5, 7 and 8, in this embodiment, a mounting sleeve 518 is fixedly sleeved on the outer side of the adjusting motor 515, three fixing rods 509 are fixedly mounted on the outer side of the mounting sleeve 518, the same fixing sleeve 510 is fixedly mounted on the left ends of the three fixing rods 509, and the fixing sleeve 510 is movably sleeved on the outer side of the screw 516.

Referring to fig. 5 and 7, in this embodiment, three cylinders 511 are fixedly mounted on the outer side of the fixing sleeve 510, second hinge blocks 512 are fixedly mounted on the inner sides of the three first connecting rods 502, hinge seats 513 are fixedly mounted on the output ends of the three cylinders 511, and the hinge seats 513 are hinged to the second hinge blocks 512.

Referring to fig. 3, 4 and 5, in this embodiment, two support plates 1 are all rotatably mounted on one side of each support plate, two rotation sleeves 6 are all rotatably connected with a cutting box 3 on one side of each support plate, two support plates 1 are all fixedly mounted on one side of each support plate, and a driving motor 8 is fixedly mounted at the bottom of each fixing plate 7.

Referring to fig. 4, in this embodiment, a driving bevel gear 9 is fixedly mounted on the outer side of an output shaft of a driving motor 8, a driven bevel gear 10 is fixedly sleeved on the outer side of a first rotating shaft 2, and the driving bevel gear 9 is meshed with the driven bevel gear 10.

Referring to fig. 1-13, a method for using an MPP power pipe cutting device for power construction is characterized by comprising the following steps:

s1: (the working principle of the invention is described with reference to fig. 13), firstly, the device is placed in a pipeline, then, the device is moved to a cutting point in the pipeline through a driving wheel 514 (in actual use, the position of the device in the pipeline can be controlled in real time through adding positioning equipment), then, two adjusting motors 515 are started, the output shafts of the adjusting motors 515 rotate to drive screws 516 to rotate, so that a set square 506 can be driven to slide outside the screws 516, the two set squares 506 are far away from each other, in the moving process of the set square 506, three first hinging blocks 508 are pushed to move through a third connecting rod 507, so that three second connecting rods 504 can be driven to rotate around the hinging positions of the telescopic rods 503, and then, the driving wheels 514 are far away from each other until the driving wheels abut against the inner walls of the pipeline, so that the device is positioned.

S2: then, the driving motor 8 is started, the output shaft of the driving motor 8 rotates to drive the driving bevel gear 9 to be meshed with the driven bevel gear 10, so that the first rotating shaft 2 positioned at the left side can be driven to rotate, the cutting box 3 can be driven to rotate, the cutting blades 405 can rotate at a high speed, when the blades are rotated, the stirring motor 410 is started, the output shaft of the stirring motor 410 rotates to drive the worm 411 to be meshed with the worm wheel 412, so that the stirring disc 407 can be driven to rotate, and then six stirring rods 409 can be stirred to slide outwards in the sliding grooves 403 through the arc-shaped grooves 408, so that the six cutting blades 405 gradually expand outwards, and the six cutting blades 405 gradually contact with the inner wall of a pipeline in the process of gradually expanding outwards, and then cut the pipeline from inside to outside.

S3: when the cut section of the pipe needs to be cut into an inclined plane, the coplanar two cylinders 511 are started, so that the output ends of the two cylinders 511 are contracted, the output end contraction of the left cylinder 511 pulls the left second hinge block 512 to move inwards, so that the left first connecting rod 502 is driven to rotate clockwise, and meanwhile the left telescopic rod 503 rotates anticlockwise and gradually stretches along with the continuous contraction of the output end of the left cylinder 511.

S4: meanwhile, the output end of the cylinder 511 on the right side is contracted to pull the second hinging block 512 on the right side to move inwards, so that the first connecting rod 502 on the right side is driven to rotate clockwise, the telescopic rod 503 on the right side is simultaneously rotated anticlockwise, the telescopic rod continues to contract along with the output end of the cylinder 511 on the right side and gradually stretches, in the process, the two supporting plates 1 can drive the cutting box 3 to rotate and deviate clockwise by a small amplitude, the cutting angle of the cutting mechanism 4 is adjusted, and the operation of cutting the cutting section of a pipeline into an inclined plane can be realized, so that the application range of the device is obviously improved.

The embodiment of the present embodiment has been described above with reference to the accompanying drawings, but the embodiment is not limited to the above-described specific implementation, which is merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the embodiment and the scope of the protection of the claims, which fall within the protection of the embodiment.

Claims (6)

1. An electric power construction MPP power pipe cutting device, comprising: the device is characterized in that a cutting mechanism (4) is arranged in the cutting box (3), the cutting mechanism (4) is used for cutting an MPP pipe, adjusting mechanisms (5) are arranged on the two support plates (1), and the adjusting mechanisms (5) are used for adjusting the cutting angle of the cutting mechanism (4);

the cutting mechanism (4) comprises six arc-shaped plates (401), the right side of each arc-shaped plate (401) is fixedly provided with the same fixed disc (402), each fixed disc (402) is provided with six sliding grooves (403), each sliding groove (403) is arranged in an array by taking the center of the circle of each fixed disc (402) as the center, sliding rods (404) are connected in the sliding grooves (403) in a sliding manner, each six sliding rods (404) penetrates through the cutting box (3) and extends to the outer side of the cutting box, and each six sliding rods (404) is fixedly provided with a cutting blade (405);

the adjusting mechanism (5) comprises three ball-head universal joints (501), the left sides of the three ball-head universal joints (501) are fixedly provided with first connecting rods (502), the three first connecting rods (502) are arranged in an array by taking the center of a supporting plate (1) as the center, the left ends of the three first connecting rods (502) are hinged with telescopic rods (503), the left ends of the three telescopic rods (503) are hinged with second connecting rods (504), four driving wheels (514) are rotatably arranged on the second connecting rods (504), the supporting plate (1) is fixedly provided with ball-cage universal joints (517), the outer sides of output shafts of the adjusting motors (515) are fixedly provided with screws (516), limiting plates (505) are fixedly arranged on the screws (516), the outer sides of the screws (516) are connected with triangular plates (506) in a threaded mode, the left ends of the three telescopic rods (503) are hinged with third connecting rods (507), the inner sides of the three second connecting rods (504) are fixedly provided with first connecting rods (508), the outer sides of the third connecting rods (518) are fixedly provided with adjusting motors (515), the outer sides of the third connecting rods (518) are fixedly provided with the outer sides of the adjusting motors (518), the left end fixed mounting of three dead levers (509) has same fixed cover (510), the outside at screw rod (516) is established to fixed cover (510) movable sleeve, the outside fixed mounting of fixed cover (510) has three cylinder (511), and the inboard of three first connecting rod (502) all fixed mounting has second articulated piece (512), and the output of three cylinder (511) all fixed mounting has articulated seat (513), articulated seat (513) are articulated mutually with second articulated piece (512).

2. The power construction MPP power tube cutting device of claim 1, wherein the same second rotating shaft (406) is rotatably installed between the inner walls of the left side and the right side of the cutting box (3), the second rotating shaft (406) penetrates through the fixed disc (402) and is rotatably connected with the fixed disc (402), a poking disc (407) is fixedly sleeved on the outer side of the second rotating shaft (406), six arc-shaped grooves (408) are formed in the poking disc (407), poking rods (409) are fixedly installed on the inner sides of the six sliding rods (404), and the poking rods (409) extend into the arc-shaped grooves (408).

3. The power construction MPP power tube cutting device of claim 2, wherein a poking motor (410) is fixedly installed on the left inner wall of the cutting box (3), a worm (411) is fixedly installed on the outer side of an output shaft of the poking motor (410), a worm wheel (412) is fixedly sleeved on the outer side of the second rotating shaft (406), and the worm (411) is meshed with the worm wheel (412).

4. A cutting device for an MPP power pipe for power construction according to claim 3, characterized in that, two support plates (1) are provided with a rotating sleeve (6) in a rotating way on one side close to each other, two rotating sleeves (6) are provided with a fixed plate (7) in a rotating way on one side close to each other, two support plates (1) are provided with a driving motor (8) in a fixed way on one side close to each other.

5. The power construction MPP power tube cutting device of claim 4, wherein a driving bevel gear (9) is fixedly installed on the outer side of an output shaft of the driving motor (8), a driven bevel gear (10) is fixedly sleeved on the outer side of the first rotating shaft (2), and the driving bevel gear (9) is meshed with the driven bevel gear (10).

6. A method of using a power construction MPP power tube cutting device as defined in claim 5, comprising:

s1: firstly, placing the device in a pipeline, then, moving the device to a cutting point in the pipeline through a driving wheel (514), starting two adjusting motors (515), and enabling an output shaft of each adjusting motor (515) to rotate so as to drive a screw (516) to rotate, so that a triangular plate (506) can be driven to slide outside the screw (516), the two triangular plates (506) are far away from each other, and in the moving process of the triangular plate (506), three first hinging blocks (508) are pushed to move through a third connecting rod (507), so that three second connecting rods (504) can be driven to rotate around the hinging positions of the telescopic rods (503), and further, the driving wheels (514) are far away from each other until the driving wheels are propped against the inner wall of the pipeline, and the device is positioned;

s2: then, a driving motor (8) is started, an output shaft of the driving motor (8) rotates to drive a driving bevel gear (9) to be meshed with a driven bevel gear (10), so that a first rotating shaft (2) positioned at the left side can be driven to rotate, a cutting box (3) can be driven to rotate, a cutting blade (405) can rotate at a high speed, when the blade rotates, a stirring motor (410) is started, an output shaft of the stirring motor (410) rotates to drive a worm (411) to be meshed with a worm wheel (412), so that a stirring disc (407) can be driven to rotate, six stirring rods (409) can be stirred by a spiral groove (408) to slide outwards in a sliding groove (403), six cutting blades (405) can be gradually expanded outwards, the six cutting blades (405) can be gradually contacted with the inner wall of a pipeline in the process of gradually expanding outwards, and then the pipeline is cut outwards from inside;

s3: when the cut section of the pipeline is required to be cut into an inclined plane, starting the two coplanar cylinders (511), enabling the output ends of the two cylinders (511) to shrink, enabling the output end of the left cylinder (511) to shrink to pull the left second hinging block (512) to move inwards, driving the left first connecting rod (502) to rotate clockwise, enabling the left telescopic rod (503) to rotate anticlockwise, and enabling the output end of the left cylinder (511) to shrink continuously and extend gradually;

s4: meanwhile, the output end of the right cylinder (511) is contracted to pull the second hinging block (512) on the right side to move inwards, so that the first connecting rod (502) on the right side is driven to rotate clockwise, the telescopic rod (503) on the right side is simultaneously rotated anticlockwise, the telescopic rod is gradually lengthened along with the continuous contraction of the output end of the right cylinder (511), and in the process, the two supporting plates (1) can drive the cutting box (3) to rotate and deviate in a clockwise small amplitude, thereby realizing the adjustment of the cutting angle of the cutting mechanism (4), and further realizing the operation of cutting the cutting section of a pipeline into an inclined plane, so that the application range of the device is obviously improved.