CN116275247A

CN116275247A - Pipeline cutting machine

Info

Publication number: CN116275247A
Application number: CN202310143099.XA
Authority: CN
Inventors: 刘畅; 张银; 高龙; 杜晓慧; 吕海雷; 王辰宇; 孙琦; 晁昊
Original assignee: China Institute of Atomic of Energy
Current assignee: China Institute of Atomic of Energy
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-06-23

Abstract

Embodiments of the present application provide a pipe cutter, comprising: a body; the driving parts are circumferentially arranged on the periphery of the body, and can prop against the inner wall of the pipeline after the pipeline cutting machine enters the pipeline so as to support the body in the center of the pipeline and drive the body to move in the pipeline; the cutter assembly is connected with the body, and the cutter assembly can move relative to the body so as to cut the pipeline.

Description

Pipeline cutting machine

Technical Field

At least one embodiment of the present application relates to a cutting device, and in particular to a cutting machine for a pipe.

Background

The pipe may need to be cut and destroyed after use, however, the pipe may not be cut manually in some special environments, for example, radioactive substances may remain in the pipe for nuclear facilities, the manual cutting may not ensure the safety of operators, and in some environments, the pipe may be in a narrower or inconvenient-to-reach environment, and thus the cutting operation may not be completed outside the pipe, and for this reason, a pipe cutting machine needs to be provided to cut the pipes.

Disclosure of Invention

In view of the above, the present application has been made to provide a pipe cutter that overcomes or at least partially solves the above-mentioned problems.

According to an embodiment of the present application, there is provided a pipe cutting machine including: a body; the driving parts are circumferentially arranged on the periphery of the body, and can prop against the inner wall of the pipeline after the pipeline cutting machine enters the pipeline so as to support the body in the center of the pipeline and drive the body to move in the pipeline; the cutter assembly is connected with the body, and the cutter assembly can move relative to the body so as to cut the pipeline.

According to the pipeline cutting machine provided by the embodiment of the application, the pipeline cutting machine is driven to move inside the nuclear facility pipeline to be cut through the driving part, so that the pipeline cutting machine provided with the cutter circumferentially cuts the nuclear facility pipeline from the inside, the cutting efficiency of the nuclear facility pipeline is improved, the problem of personal safety caused by manual cutting is avoided, and the external irradiation dose of workers can be reduced.

Drawings

FIG. 1 is a schematic perspective view of a pipe cutter according to one embodiment of the present application;

FIG. 2 is a cross-sectional view of a lifting device according to one embodiment of the present application;

FIG. 3 is a cross-sectional view of a lifting device according to another embodiment of the present application;

FIG. 4 is a cross-sectional view of a lifting device according to yet another embodiment of the present application;

fig. 5 is a schematic perspective view of a driving part according to an embodiment of the present application; and

fig. 6 is a schematic diagram of the connection between the rotating shaft and the rocker mechanism according to one embodiment of the present application.

Detailed Description

For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It will be apparent that the described embodiments are one embodiment of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without the benefit of the present disclosure, are intended to be within the scope of the present application based on the described embodiments.

It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which this application belongs. If, throughout, reference is made to "first," "second," etc., the description of "first," "second," etc., is used merely for distinguishing between similar objects and not for understanding as indicating or implying a relative importance, order, or implicitly indicating the number of technical features indicated, it being understood that the data of "first," "second," etc., may be interchanged where appropriate. If "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "A and/or B" including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously.

The embodiment of the application provides a pipeline cutting machine, referring to fig. 1, capable of walking in a pipeline and cutting the pipeline, and suitable for any pipeline needing cutting operation, particularly suitable for pipelines such as nuclear facility pipelines and the like which are difficult to cut manually.

Fig. 1 is a perspective view of a pipe cutter according to one embodiment of the present application, and referring to fig. 1, the pipe cutter includes a body 10, at least three driving parts 20, and a cutter assembly 30.

At least three driving parts 20 are circumferentially provided at the periphery of the body 10, and when the pipe cutter enters the pipe, the three driving parts 20 can be abutted against the inside of the pipe, thereby supporting the body 10 at the center of the pipe. Further, the driving unit 20 can also drive the body 10 to move in the pipe. The driving part 20 may include a track, a wheel, etc., and the body 10 is moved in the pipe by the rotation of these structures.

In this embodiment, the body 10 may be welded with a steel structure, where the cross-sectional shape of the body 10 varies with the number of situational devices, for example, when the number of driving parts 20 is three, the cross-sectional shape of the body 10 is triangular, when the number of driving parts 20 is four, the cross-sectional shape of the body 10 is square, when the number of driving parts 20 is five, the cross-sectional shape of the body 10 is pentagonal, and so on.

The cutter assembly 30 is coupled to the body 10, and the cutter assembly 30 is capable of moving relative to the body 10 to cut a pipe, and the cutter assembly 30 may include one or more cutters and a driving device for driving the cutters to move. When the body 10 is moved to a position where cutting is desired, the cutter assembly 30 may be moved to effect the cutting action of the pipe.

In this embodiment, the pipe cutter may be operated by a worker in a wired or wireless manner, wherein the pipe cutter may be powered by a battery provided on the body 10, or may be powered by an external power source in a wired manner.

The pipeline cutter provided by the embodiment can enter the pipeline and move in the pipeline, so that the cutting of the pipeline is realized, and the safety problem possibly existing in manual cutting under some conditions is avoided. Further, the driving portion 20 in the present embodiment can support the body 10 at the center of the pipe, and the cutter assembly 30 is connected to the body 10, that is, the movement axis of the cutter assembly 30 is near the center of the pipe, so that the cutting can be completed with a small movement amplitude.

In some embodiments, referring to fig. 2, the cutter assembly 30 may specifically include a rotating shaft 300, a rocker mechanism 400, and a cutter 500.

The rotary shaft 300 is provided on the body 10, and the rotary shaft 300 is coaxial with the pipe when the pipe cutter is just like the pipe. One end of the rocker mechanism 400 is connected to the rotation shaft to rotate in a radial plane under the drive of the rotation shaft 300. The cutter 500 is mounted on the rocker mechanism 400. In this embodiment, after the body 10 moves to the position to be cut, the rotation shaft 300 can drive the rocker mechanism 400 to rotate in the radial plane, so as to drive the cutter 500 to move to complete the cutting.

In some embodiments, the cutter 500 may include a blade 510 that may rotate in a radial plane, and during use, the rocker mechanism 400 may cause the cutter 500 to revolve along the inner wall of the pipe, while the blade 510 may spin in the radial plane, thereby improving the cutting efficiency.

In some embodiments, referring to fig. 1, the pipe cutter further includes at least three elevating devices 600, the plurality of elevating devices 600 being respectively disposed between the body 10 and the driving parts 20, the elevating devices 600 being configured to be elevated radially in synchronization with respect to the body 10 so that each driving part 20 abuts against an inner wall of the pipe.

In this embodiment, the lifting device 600 can adjust the relative distance between the driving part 20 and the body 10, so as to adapt to the requirements of cutting pipes with different inner diameters. It should be noted that the number of lifting devices 600 is not less than the number of driving units 20, so that at least one lifting device 600 is connected to each driving unit 20.

In one embodiment, the pipe cutter is placed in the pipe where only a portion of the drive portion 20 may be in contact with the inner wall of the pipe and the body 10 is not centered in the pipe. In this case, the operation of the elevating device 600 is controlled such that the elevating devices 600 synchronously control the relative positions of the driving parts 20 to be changed until all the driving parts 20 are in close contact with the inner wall of the pipe, and the pipe cutter is moved in the pipe by the frictional force between the driving parts and the inner wall of the pipe. Because of the synchronous lifting of the plurality of lifting devices 600, the center of the body 10 and the rotation shaft 300 are both located at the center of the pipe, and thus the rocker mechanism 400 and the cutter 500 can be controlled to cut the pipe.

Fig. 2 is a cross-sectional view of a lifting device 600 according to one embodiment of the present application.

In some embodiments, referring to fig. 2, each lifting device 600 includes at least two sets of support mechanisms 610 and a first travel drive 620. Each set of support mechanisms 610 includes a support frame 611 and a connecting frame 612, each of which support frame 611 and connecting frame 612 can be used as two opposite sides of a rectangular frame to maintain stability of the support mechanism. Both ends of the supporting frame 611 are rotatably connected to the body 10 and the driving part 20, respectively. One end of each link 612 is rotatably coupled to the other end of the support frame 611.

In this embodiment, the first driving member 620 is disposed on the body 10 and connected to one end of the connecting frame 612 of each set of supporting mechanism 610 near the body 10, and the first driving member 620 is used for changing the included angle between the connecting frame 612 and the body 10 to change the radial distance of the lifting device 600 relative to the body.

In this embodiment, in order to avoid shaking of the driving part 20 when the lifting device 600 is lifted, at least two supporting mechanisms 610 may be provided in each lifting device 600 to simultaneously connect the driving parts 20.

In the present embodiment, when the position of the driving portion 20 is adjusted, the first travel driving device 620 can be controlled to operate so that the angle between the connecting frame 612 and the body 10 is changed, thereby changing the angle between the supporting frame 611 and the body 10. Since the supporting frame 611 is connected between the body 10 and the driving part 20, when the angle between the supporting frame 611 and the body 10 is changed, the radial distance between the driving part 20 and the body 10 is changed, so that the plurality of driving parts 20 can be brought into close contact with the inner wall of the pipe to move the pipe cutter within the pipe by using the friction between the driving parts and the inner wall of the pipe.

In this embodiment, the setting of the lifting device 600 improves the applicability of the pipe cutting machine to cutting pipes with different pipe diameter ranges, and meets the cutting requirements of pipes with different pipe diameters.

In one embodiment, referring to fig. 2, the first stroke drive 620 includes a first motor 621, a first lead screw 622, and at least two first nuts 623. The first motor 621 is provided on the body 10. One end of the first screw 622 is connected to an output shaft of the first motor 621, and the other end of the first screw 622 is rotatably connected to the body 10. A plurality of first nuts 623 are rotatably sleeved on the first screw rod 622, and each first nut 623 is rotatably connected with one end of the connecting frame 612 of the supporting mechanism 610 belonging to the same group, which is close to the body 10.

In this embodiment, the combination of the first motor 621, the first screw 622 and the first nut 623 may synchronously drive the connection frames 612 in different supporting mechanisms 610, or one combination may be disposed in each supporting mechanism 610 to drive the connection frames 612 in the corresponding supporting mechanisms 610 respectively.

In this embodiment, when the position of the driving portion 20 is adjusted, the first motor 621 may be controlled to operate, the first motor 621 drives the first screw rod 622 to rotate, at this time, the first nut 623 on the first screw rod 622 moves along with the rotation of the first screw rod 622, and the angle between the connection frame 612 connected to the first nut 623 and the body 10 is changed, so as to change the angle between the support frame 611 and the body 10, so that the distance between the driving portion 20 and the body 10 is changed, and further, the driving portions 20 are in close contact with the inner wall of the pipe.

Fig. 3 is a cross-sectional view of a lifting device 600 according to another embodiment of the present application.

In another embodiment, referring to fig. 3, the first stroke driving part 620 includes a power up-down lever 624, one end of the power up-down lever 624 is connected to the body 10, and one side of each link 612 near the body 10 is rotatably connected to the other end of the power up-down lever 624.

In this embodiment, one electric lifting rod 624 may be connected to the connecting frames 612 of multiple groups of supporting mechanisms 610 at intervals to synchronously drive the connecting frames 612 of different supporting mechanisms 610, or one electric lifting rod 624 may be disposed in each supporting mechanism 610 to drive the connecting frames 612 in the supporting mechanism 610.

In this embodiment, when the position of the driving portion 20 is adjusted, the electric lifting and shrinking rod 624 can be controlled to work, and as the length of the electric lifting and shrinking rod 624 is changed, the angle between the connecting frame 612 connected with the electric lifting and shrinking rod 624 and the body 10 is changed, so that the angle between the supporting frame 611 and the body 10 is changed at the same time, the distance between the driving portion 20 and the body 10 is changed, and then the driving portions 20 are in close contact with the inner wall of the pipeline.

Fig. 4 is a cross-sectional view of a lifting device 600 according to another embodiment of the present application.

In this embodiment, referring to fig. 4, the lifting device 600 includes a scissor lift mechanism 630, one side of the scissor lift mechanism 630 is connected to the body 10, and the other side is connected to one driving unit 20.

In this embodiment, each driving part 20 is connected to at least one scissor-type lifting mechanism, and when the scissor-type lifting mechanism 630 is operated, its own height is changed, and since the scissor-type lifting mechanism 630 is connected between the vehicle body device and the driving part 20, in the case of a change in the height of the scissor-type lifting mechanism 630, the radial distance between the driving part 20 and the body 10 is changed with a change in the height of the scissor-type lifting mechanism 600, so that a plurality of driving parts 20 are all in contact with the inner wall of the pipe.

In this embodiment, referring to fig. 4, the scissor lift mechanism 630 includes first and

second connection plates

631 and 632 disposed opposite each other, at least one scissor 633, a sliding portion 634, and a second travel drive 635. The first connecting plate 631 and the second connecting plate 632 are connected to the driving section 20 and the body 10, respectively. A first connection point of a first end of the scissors 633 is rotatably connected to the first connection plate 631, and a first connection point of a second end of the scissors 633 is rotatably connected to the second connection plate 632. The second connection point of the first end of the scissors 633 is connected to the first connection plate 631 by a sliding portion 634. A second connection point of the second end of the scissors 633 is connected to the second connection plate 632 through a second travel driver 635.

In this embodiment, the scissors 633 is formed by two support plates that are disposed in a crossing manner, and a movable portion is disposed between the two support plates, so that the two support plates can rotate in opposite directions.

In this embodiment, when the scissor lift mechanism 630 is operated, the second stroke driving member 635 drives the angle between the two support plates in the scissor 633 to change, so that the distance between the first connecting plate 631 and the second connecting plate 632 can be changed. Since the first connection plate 631 and the second connection plate 632 are connected to the driving part 20 and the body 10, respectively, in the case where the distance between the first connection plate 631 and the second connection plate 632 is changed, the relative distance between the driving part 20 and the body 10 is changed synchronously, thereby realizing that the plurality of driving parts 20 are all in contact with the inner wall of the pipe.

In the present embodiment, referring to fig. 4, the sliding portion 634 includes a first sliding bar 6341 and a first slider 6342. The first sliding bar 6341 is disposed on the first connection plate 631 by a first bracket. A first slider 6342 is slidably disposed on the first slide 6341, the first slider 6342 being rotatably coupled to a second connection point of the first end of the scissors 633.

In this embodiment, the first sliding bar 6341 and the first sliding block 6342 are used to adjust the height of the fork 633 by sliding the first sliding block 6342 over the first sliding bar 6341 to accommodate the change in angle between the two support plates in the fork 633.

In this embodiment, referring to fig. 4, the second stroke driver 635 includes a second screw 6351, a second motor 6352, and a second nut 6353. The second screw 6351 is disposed on the second connection plate 632 through a second bracket. The second motor 6352 is disposed on one side of the second bracket, and an output shaft of the second motor 6352 is in transmission connection with the second screw 6351. The second nut 6353 is rotatably sleeved on the second screw rod 6351, and the second nut 6353 is rotatably connected to a second connection point at the second end of the scissor 633.

In this embodiment, when the second motor 6352 drives the second screw 6351 to rotate, the second screw 6353 moves on the second screw 6351, and at this time, the angle between the support plate of the fork 633 connected to the second screw 6353 and the other support plate is changed, so that the height between the first connection plate 631 and the second connection plate 632 is adjusted, and the distance between the body 10 and the driving part 20 is changed, so that the driving part 20 contacts the inner wall of the pipe.

In this embodiment, referring to fig. 4, the second stroke driver 635 further includes a second slide bar 6354 and a second slider 6355. The second slide bar 6354 is disposed on the second bracket. The second slider 6355 is slidably disposed on the second slide bar 6354, and the second slider 6355 is connected to the second nut 6353.

In this embodiment, the second sliding rod 6354 and the second sliding block 6355 are used to fix the second screw 6353, so as to prevent the second screw 6353 from rotating in a radial direction when the second screw 6351 rotates, so as to improve the overall stability of the scissor fork lifting mechanism 630.

Fig. 5 is a perspective view of the driving part 20 according to one embodiment of the present application.

In this embodiment, referring to fig. 5, each driving part 20 includes a frame 210, at least two roller 220 tracks 240. The frame 210 is mounted on the lifting device 600, and the frame 210 may be welded from a plurality of steel structures. At least two rollers 220 are respectively disposed at two ends of a side of the frame 210 away from the body 10. The caterpillar band 240 is wrapped around the two rollers 220 to move closely against the inner wall of the pipe under the driving of the rollers, thereby driving the pipe cutter to travel within the pipe.

In some embodiments, the driving part 20 may further include a third motor 230, the third motor 230 being disposed in the frame 210, the third motor 230 being adapted to drive one of the two rollers 220 to rotate.

In this embodiment, during the movement of the pipe cutter, the third motor 230 drives one roller (driving wheel) 220 to rotate, and the crawler 240 wound on the two rollers 220 starts to crawl on the inner wall of the pipe at this time, wherein during the movement of the pipe cutter, the rollers (driven wheels) 220 which are not directly connected with the third motor 230 rotate synchronously under the rotation of the crawler 240.

In this embodiment, referring to fig. 5, the driving part 20 further includes at least two spring sets (not shown), at least two third brackets 250, and at least two guide wheels 260, and a dust cover may be further disposed. At least two spring sets are spaced apart on a side of the frame 210 remote from the body 10 and between the two rollers 220. Each third bracket 250 is connected to at least one spring set. Idler 260 is rotatably mounted to third bracket 250, and idler 260 is configured to compress track 240 against the inner wall of the pipeline. The dust cover is wrapped on the frame 210, and the crawler 240 is located outside the dust cover.

In this embodiment, in order to make the track 240 be in a tensioning state all the time, a tensioning mechanism may be disposed in the driving portion 20, the guide pulley 260 is in direct contact with the track 240, and the springs in the spring set compress the track 240 on the inner wall of the pipeline through the guide pulley 260 on the third bracket 250 in the elastic deformation process, so that the problem that the pipeline cutting machine is difficult to crawl due to loosening of the track 240 is avoided. To increase friction between track 240 and the inner wall of the pipe, the outer surface of track 240 is coated with anti-slip features, such as sand.

In this embodiment, the crawler-type traveling driving portion 20 not only increases the attaching area and supporting force between the whole pipeline cutter and the inner wall of the pipeline, but also overcomes the negative influence of undulation and corrosion debris deposition possibly existing on the inner wall of the pipeline on traveling, and simultaneously effectively responds to the reaction force of cutting vibration to the pipeline cutter in the cutting process, improves the stability of the pipeline cutter in traveling and cutting, and reduces the failure rate.

In this embodiment, in order to avoid the impact of debris during cutting on the performance of the pipe cutter, dust caps may be provided on both the body 10 and the form frame.

In some embodiments, referring to fig. 6, the pipe cutting apparatus further includes a fourth motor 310, the fourth motor 310 being disposed in the body 10, the fourth motor 310 for driving the rotation shaft 300 to rotate, and the rotation shaft 300 may be mounted at the fourth motor 310 and protrude from the center of the body 10.

In this embodiment, after the pipe cutter is crawled to a position to be cut, the operation of the fourth motor 310 may be controlled such that the fourth motor 310 drives the swing arm mechanism 400 to rotate (revolve) while the blade 510 of the cutter 500 rotates (rotates) to cut the pipe.

In one embodiment, the working radius of the rocker mechanism 400 is configured to be adjustable to enable the cutter assembly 30 to accommodate pipes of different pipe diameters.

In some embodiments, the rocker mechanism 400 includes a telescopic rocker arm 410, which may be, for example, a hydraulic lever rocker arm 410, that cuts a pipe by changing the stroke of the hydraulic lever such that the blade 510 of the cutter 500 on the rocker mechanism 400.

In this embodiment, the rocker arm mechanism 400 may further include a sleeve and a cylinder, wherein a motor is disposed in the sleeve, an output shaft of the motor is connected with a screw, and a threaded channel is disposed on a bottom surface of the cylinder, and the threaded channel is in threaded connection with the screw. The cutting is accomplished by controlling the rotation of the motor to reciprocate the cylinder up and down relative to the sleeve to adjust the distance of the blade 510 from the inner wall of the pipe (i.e., change the working radius of the rocker mechanism 400) so that during cutting, the cutter is maintained in close contact with the inner wall of the pipe.

In another embodiment, referring to fig. 6, a rocker mechanism 400 includes a first arm 410, a second arm 420. The cutter 500 is mounted at an end of the second arm 420 remote from the first arm 410 by changing an angle between the adjacent first arm 410 and second arm 420, thereby changing a working radius of the rocker mechanism 400 such that the cutter is maintained in close contact with an inner wall of the pipe during cutting, to effect cutting, the second arm 420 being rotatably coupled to the first arm 410 at a rotational axis of the first arm 410. In some embodiments, the rocker mechanism 400 may also include more rotatably coupled arms to enable a greater range of working radius changes.

In some embodiments, the angle between the two arms may be changed by means of a fifth motor 430. In an alternative embodiment, a resilient mechanism, such as a torsion spring, may be mounted between the two arms, the resilient mechanism being arranged to resiliently drive the rocker arm such that during cutting the cutter is held in close contact with the inner wall of the conduit to effect the cut.

In this embodiment, referring to fig. 6, the cutter 500 further includes a sixth motor 520, and the sixth motor 520 is disposed at the other end of the rocker mechanism 400 to drive the blade 510 to rotate. In this embodiment, when the cutter 500 is operated, the sixth motor 520 drives the blade 510 to cut the inner wall of the pipe, and the blade 510 cuts the entire pipe as the rotation shaft 300 rotates.

In this embodiment, the pipe cutter further includes at least a plurality of monitors and a plurality of illumination lamps. The monitors are respectively disposed on different areas of the body 10. A plurality of illumination lamps are respectively provided on each driving part 20 and/or the body 10.

In this embodiment, in order to monitor the cutting position and the cutting effect more conveniently, a plurality of monitors, such as cameras, may be disposed on the body 10, so that the staff can monitor the cutting status and the pipeline status in real time, and a plurality of illumination lamps may be disposed on the pipeline cutting machine, so as to provide enough brightness for the monitors to collect images.

The embodiment of the application next provides an in-pipeline cutting method for an outdoor radioactive nuclear facility, which is specifically the following flow.

Before cutting operation is carried out, a special air curtain is built nearby an operation area by means of lifting equipment, supporting force is continuously provided by the lifting equipment when necessary to keep stable air curtain and nuclear facility pipelines, an air outlet of a movable air exhaust purification device is arranged in the special air curtain, and the movable air exhaust purification device is installed on the ground.

Step 2. Personnel carry the pipeline cutter and the manual cutting tool to access the target nuclear facility pipeline by means of other lifting devices (if no air curtain is supported, the original lifting device is still used).

And step 3, if the pipeline end (broken) surface is not arranged at the operation position for the installation of the pipeline cutting machine, starting the movable exhaust purification device, and finishing one-time cutting of the nuclear facility pipeline in the air curtain by a worker through holding the pipeline cutting machine, thereby creating an operation surface for the pipeline cutting machine.

Step 4, a worker places the pipeline cutting machine into the nuclear facility pipeline, and the worker covers the dust cover to the port of the nuclear facility pipeline to finish the cable (if the cable is controlled in a wireless mode, the cable is not required to be finished).

Step 5, the staff remotely adjusts the lifting device 600 on the pipeline cutting machine to synchronously expand and contract through the monitor, and adjusts the pipeline cutting machine to the center of the body 10 and the nuclear facility pipeline.

And 6, covering the dust cover to the pipeline port of the nuclear facility after the running state of the pipeline cutting machine is confirmed. The staff is arranged to reside in the air curtain and is responsible for working coordination and emergency measures.

Step 7, a worker remotely controls the pipeline cutting machine to walk along the inner wall of the nuclear facility pipeline, positions the pipeline cutting machine to a certain position to be cut, stretches out the remote control rocker arm mechanism 400, drives the blade 510 to be in close contact with the inner wall of the nuclear facility pipeline, continues stretching out the rocker arm mechanism 400 to ensure the pressure of the blade 510 on the wall of the nuclear facility pipeline, and drives the rocker arm mechanism 400 to rotate for one circle to finish cutting by the rotating shaft 300, and then controls the rocker arm mechanism 400 to retract.

And 8, manually and timely packaging and fixing the cut nuclear facility pipeline and the pipeline cutting machine therein, and then moving the cut nuclear facility pipeline to the ground through lifting equipment.

Step 9, checking the state of the dust cover, wrapping double-layer plastic packages outside the dust cover, taking down the dust cover by workers through the plastic packages in a bag inlet and outlet mode, checking the states of the dust cover and an external control cable, slowly withdrawing the nuclear facility pipeline from the remote control inner cutting structure, entering the plastic packages, and tying the plastic bags.

And step 10, judging whether to continue the operation according to the operation progress. If the cutting is continued, the double-layer plastic package in the step 9 is butted to a new nuclear facility pipeline notch, a worker is used for lining the plastic in-fabric cutting structure to reinstall the double-layer plastic package into the nuclear facility pipeline to continue the cutting operation, and the steps 4-9 are repeated until the preset cutting operation is completed.

And step 11, if no operation is performed, retrieving and wiping the pipeline cutting machine in the plastic bag for decontamination, detecting the surface pollution level of the structure, and if the crawler belt 240 and the control cable are still at a higher pollution level after decontamination, treating the pipeline cutting machine as radioactive waste.

In this embodiment, the dust cover can adopt multistage diameter size form to adapt to different nuclear facility pipeline diameters, can be equipped with the idle running joint of aviation in the middle of the dust cover, the cable of being convenient for is pegged graft. After the pipe cutter is installed inside the nuclear facility pipe, the worker seals the pipe port using a dust cover.

In the embodiment, the limitation of the external space of the outdoor nuclear facility pipeline to the cutting operation is avoided through a reasonable internal cutting implementation method, the manual direct cutting amount is effectively reduced, the radioactive pollution is prevented from being diffused, the external irradiation dose of workers is reduced to the greatest extent, and the safety risk and unnecessary irradiation problems caused by manual operation under high radiation level of the high-altitude operation are solved.

The present invention has been described in detail with reference to the drawings and the embodiments, but the present invention is not limited to the embodiments described above, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The invention may be practiced otherwise than as specifically described.

Claims

1. A pipe cutter comprising:

a body;

the driving parts are circumferentially arranged on the periphery of the body, and after the pipeline cutting machine enters a pipeline, the driving parts can be propped against the inner wall of the pipeline so as to support the body in the center of the pipeline and drive the body to move in the pipeline;

the cutter assembly is connected with the body, and the cutter assembly can move relative to the body so as to cut the pipeline.

2. The pipe cutter of claim 1 wherein the cutter assembly comprises:

the rotary shaft is connected with the body, and is coaxial with the pipeline after the pipeline cutting machine enters the pipeline;

the rocker arm mechanism is connected with the rotating shaft and can rotate in a radial plane under the drive of the rotating shaft; and

and the cutter is arranged on the rocker arm mechanism.

3. The pipe cutter of claim 1, further comprising:

at least three elevating devices are respectively arranged between the body and the driving part, and the elevating devices are configured to be capable of adjusting the relative distance between the driving part and the body.

4. A pipe cutter as claimed in claim 3, wherein each lifting device comprises:

two sets of supporting mechanism, every supporting mechanism of group includes:

the two ends of the supporting frame are respectively and rotatably connected with the body and the driving part; and

one end of each connecting frame is rotatably connected with the other end of the supporting frame; and

the first travel driving piece is arranged on the body and connected with one end, close to the body, of the connecting frame of each group of supporting mechanisms, and the first travel driving piece is used for changing an included angle between the connecting frame and the body.

5. A pipe cutter as claimed in claim 3, wherein the lifting means comprises:

and one side of the scissor fork type lifting mechanism is connected with the body, and the other side of the scissor fork type lifting mechanism is connected with one driving part.

6. The pipe cutter of claim 5, wherein the scissor lift mechanism comprises:

the first connecting plate and the second connecting plate are arranged oppositely, and the first connecting plate and the second connecting plate are respectively connected with the driving part and the body;

at least one scissor, wherein a first connection point of a first end of the scissor is rotatably connected with the first connection plate, and a first connection point of a second end of the scissor is rotatably connected with the second connection plate;

a sliding part, wherein a second connection point of the first end of the scissor fork is connected with the first connection plate through the sliding part;

the second connecting point of the second end of the scissor fork is connected with the second connecting plate through the second travel driving piece.

7. A pipe cutter as claimed in claim 3, wherein each of the drive portions comprises:

a frame mounted on the lifting device;

at least two rollers respectively arranged at two ends of one side of the frame away from the body;

the crawler belt is wrapped on the two rollers.

8. The pipe cutter of claim 2 wherein the working radius of the rocker mechanism is adjustable.

9. The pipe cutter of claim 8, wherein the rocker mechanism comprises:

a first arm connected to the rotation shaft;

and the second arm is rotatably connected with the first arm, and the cutter is arranged at one end of the second arm far away from the first arm.

10. The pipe cutter of claim 2, further comprising at least one of:

the monitors are respectively arranged on the body;

the illuminating lamps are respectively arranged on each driving part and/or the body.