CN210477136U

CN210477136U - Pipeline cutting machine

Info

Publication number: CN210477136U
Application number: CN201921515124.8U
Authority: CN
Inventors: 李永明
Original assignee: Zhejiang Quanqiu Pipe Industry Co ltd
Current assignee: Zhejiang Quanqiu Pipe Industry Co ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-05-08
Anticipated expiration: 2029-09-12

Abstract

The utility model relates to a pipeline cutting machine belongs to the technical field of pipeline production equipment, which comprises a frame, install the cutting machine body in the frame, still install feeding device in the frame, feeding device includes the guide rail with cutting machine body sliding connection, install actuating mechanism in the frame, actuating mechanism includes the push rod that links to each other with the cutting machine body, slidable mounting has the spacing ring on the push rod, spacing ring fixed mounting is in the frame, the one end that the cutting machine body was kept away from to the push rod is provided with first rack, it installs the bull stick still to rotate in the frame of first rack one side, fixed mounting has the first gear with first rack toothing on the bull stick, still install in the frame and be used for promoting first gear revolve's impeller. The utility model has the advantages of can follow the synchronous motion of feeding of pipeline when pipe cutting machine carries out the pipe cutting, keep the synchronous feeding of pipe cutting machine and pipeline to guarantee the continuity of whole assembly line.

Description

Pipeline cutting machine

Technical Field

The utility model belongs to the technical field of the technique of pipeline production equipment and specifically relates to a pipe cutting machine is related to.

Background

Plastic tubing is a generic term for pipes made of plastic materials. The plastic pipeline has the characteristics of light dead weight, sanitation, safety, small water flow resistance, energy conservation, metal conservation, improvement on living environment, long service life, safety, convenience and the like, and is favored by the pipeline engineering industry. In nearly 10 years, plastic pipelines in China are subject to high-speed development under the background of great development of chemical building materials under the pulling of rapid development of Chinese macroscopic economy. The production process of the plastic pipeline generally comprises the following steps: extrusion molding, cooling, cutting, traction conveying and unloading transportation.

If the patent with the publication number of CN206356650U, it discloses a pipeline cutting machine, which comprises a frame and a clamping mechanism, wherein a rotating sleeve coaxial with the clamping mechanism is arranged in the frame, the rotating sleeve is rotatably connected with the frame, an inlet is arranged on the outer wall of the rotating sleeve, a cutter mechanism extending into the inlet is fixed on the rotating sleeve, two clamping mechanisms are symmetrically arranged with the rotating sleeve as the center, and the clamping mechanism comprises a linear slide rail fixed on the frame and extending along the length direction of the frame, a support frame slidably arranged on the linear slide rail, a driving member for driving the support frame to move along the linear slide rail, and a jacket arranged in the support frame and used for clamping a pipe.

The above prior art solutions have the following drawbacks: in actual production process, pipe cutting machine is as a process in the pipeline production assembly line, when pipe cutting machine cuts the pipeline, the production of pipeline is still being carried out to the front process, pipe extruder is still constantly extruding the pipeline promptly, if pipe cutting machine is motionless with the pipeline centre gripping cutting this moment, then can interrupt the whole assembly line, consequently, need carry out the pipe cutting at pipe cutting machine simultaneously, follow the synchronous motion that feeds of pipeline, keep the synchronous feeding of pipe cutting machine and pipeline, thereby guarantee the continuity of whole assembly line.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pipeline cutting machine, it has can follow the synchronous motion that feeds of pipeline when pipeline cutting machine carries out the pipe cutting, keeps the synchronous feeding of pipeline cutting machine and pipeline to guarantee the advantage of the continuity of whole assembly line.

The above object of the present invention can be achieved by the following technical solutions:

a pipeline cutting machine comprises a rack, a cutting machine body is installed on the rack, a feeding device used for driving the cutting machine body to move is further installed on the rack, the feeding device comprises a guide rail fixedly installed on the rack, the cutting machine body is installed on the guide rail in a sliding mode, a driving mechanism used for driving the cutting machine body is installed on the rack on one side of the guide rail, the driving mechanism comprises a push rod used for pushing the cutting machine body, the push rod is connected with the cutting machine body, a limiting ring is installed on the push rod in a sliding mode, the limiting ring is fixedly installed on the rack, a first rack is arranged at one end, far away from the cutting machine body, of the push rod, a rotating rod is further rotatably installed on the rack on one side of the first rack, and a first gear meshed with the first rack is fixedly installed on the rotating rod, and the rack is also provided with a pushing piece for pushing the first gear to rotate.

Through adopting above-mentioned technical scheme, the pipeline gets into the cutting machine is internal to cut after being cut by cutting machine body centre gripping, and the new pipeline of continuous extrusion moulding is still being gone forward this moment in process, and conveyor is also being incessantly transporting new pipeline to cutting machine body department, then if the cutting machine body is fixed different this moment, then can take place to interfere with new pipeline. At the moment, the cutting machine body and the pipeline need to be driven to synchronously feed through the feeding device, so that the cutting machine body and the pipeline do not have relative position change, and the pipeline and the cutting machine body cannot interfere with each other. And starting the pushing piece, pushing the first gear to rotate by the pushing piece, pushing the first gear to rotate, pushing the first rack meshed with the first gear out under the driving of the first gear, pushing the push rod to slide in the limiting ring, pushing the push rod out to push the cutting machine body, and enabling the cutting machine body to slide along the guide rail, so that the synchronous feeding with the pipeline is realized.

The utility model discloses further set up to: the guide rail has two, just the guide rail is with one side all install in the frame actuating mechanism.

Through adopting above-mentioned technical scheme, cutting machine body weight is heavier, and two guide rails can increase the mobility stability of cutting machine body. And two actuating mechanism can improve the atress homogeneity that promotes the cutting machine body to the mobility stability of further improvement cutting machine body.

The utility model discloses further set up to: the pushing piece comprises a second gear fixedly mounted on the rotating rod, a pushing rod is mounted on the rack on one side of the second gear, a second rack meshed with the second gear is arranged on the pushing rod, an adjusting ring is in threaded connection with one end, far away from the second rack, of the pushing rod, internal threads with opposite screwing directions at two ends are arranged in the adjusting ring, and external threads with opposite screwing directions are respectively arranged on the two pushing rods.

Through adopting above-mentioned technical scheme, because be provided with the internal thread that both ends precession opposite direction in the adjustable ring, then be provided with the external screw thread that precession opposite direction on two catch bars, then only need rotate the adjustable ring this moment, with two catch bars of adjustable ring threaded connection under the screw thread promotion of adjustable ring, or be close to each other, or keep away from each other. Therefore, when the pipeline is cut, the adjusting ring is rotated to push the two pushing rods to be away from each other, the pushing rods drive the first gear to rotate through the meshing of the second rack and the second gear, and push the push rods to slide through the meshing of the first gear and the first rack, so that the push rods can push the cutting machine body to feed synchronously with the pipeline; when the pipeline cutting is finished, the adjusting ring is rotated to pull the two push rods to be close to each other, the cutting machine body can be pulled to restore the original position, and the next pipeline cutting is carried out when the length of the pipeline reaches the preset length.

The utility model discloses further set up to: still install the mount pad in the frame, the mount pad with the adjustable ring rotates to be connected, just fixed cover has connect the worm wheel on the adjustable ring, worm wheel one side still install the mount table in the frame, fixed mounting has driving motor on the mount table, fixed mounting have in driving motor's the pivot with worm wheel meshing's worm, just the worm is kept away from driving motor's one end is rotated and is installed a supporting bench, a supporting bench with the frame is fixed to be linked to each other.

By adopting the technical scheme, when the adjusting ring is required to rotate, only the driving motor needs to be started, the driving motor drives the worm to rotate, the worm rotates, the worm wheel meshed with the worm rotates, and the worm wheel drives the adjusting ring to rotate. At this in-process, the supporting bench forms the support to the worm to improve the rotational stability of worm, and the mount pad can carry out bearing and spacing to the adjusting ring, improves the rotational stability of worm wheel and adjustable ring.

The utility model discloses further set up to: the mounting seat is provided with a mounting hole, a hollow shaft sleeve is mounted in the mounting hole, a first branch pipe is connected to the shaft sleeve, one end, far away from the air inlet pipe, of the first branch pipe is connected to a main pipe, and the main pipe is connected with an air pump; the inner circumferential side wall of the shaft sleeve is provided with a first throttling hole, the first throttling hole is communicated with the inner cavity of the shaft sleeve, and the adjusting ring is positioned in the shaft hole of the shaft sleeve.

Through adopting above-mentioned technical scheme, because pipeline assembly line is continuous operation, consequently the cutting machine body need frequently reciprocal slip, then means, the adjustable ring also needs frequently to rotate, therefore the friction damage between adjustable ring and the mount pad is great. The air pump that adds is through being responsible for and goes into first minute pipe with high-pressure air pump to in the cavity of axle sleeve with high-pressure air pump income through first minute pipe, high-pressure air in the axle sleeve cavity passes through first orifice blowout, in order to form the air film in the gap between governing pipe and axle sleeve, realize contactless lubrication, because do not have the friction between governing pipe and the axle sleeve, consequently the wearing and tearing of governing pipe and axle sleeve are all less, because the vibrations that the friction leads to, generate heat, wearing and tearing etc. homoenergetic obtain improving.

The utility model discloses further set up to: the cutting machine is characterized in that a guide ring in sliding connection with the guide rail is installed on the cutting machine body, a cavity is formed in the guide ring, a second throttling hole is formed in the inner peripheral side wall of the guide ring, a second branch pipe is further installed on the guide ring, and the second branch pipe is communicated with the main pipe.

Through adopting above-mentioned technical scheme, because the cutting machine body is heavier, and need frequent reciprocating sliding, consequently and the guide rail between frictional force great, power loss is also great. The air pump can divide the intraductal pump income guide ring with high-pressure air through the second to spout through the second orifice, in order to form the air film between guide ring and guide rail, through gaseous static and dynamic pressure effect, realize the smooth movement of no friction and no vibration between guide ring and the guide rail, and compare with general guide rail, it pollutes fewly, and the precision is high.

The utility model discloses further set up to: the guide rail is provided with a sliding groove along the length direction, the inner peripheral side wall of the guide ring is further provided with a sliding block, the sliding block is connected with the sliding groove in a sliding mode, and the sectional area of the sliding groove is larger than that of the sliding block.

Through adopting above-mentioned technical scheme, the groove that slides and the cooperation of sliding block can improve the slip stability of guide ring to improve the slip stability of cutting machine body.

The utility model discloses further set up to: the limiting ring is internally provided with a cavity, the limiting ring is connected with a third branch pipe, the third branch pipe is communicated with the main pipe, and the inner peripheral side wall of the limiting ring is provided with a third throttling hole.

Through adopting above-mentioned technical scheme, the catch bar also can frequently slide with the spacing ring, and the air pump can divide the pipe to go into the spacing intra-annular with high-pressure air pump through the third to spout through third nodal hole, with form the air film in the gap between spacing ring and catch bar, then there is not frictional force between spacing ring and the catch bar, because vibrations, generate heat, wearing and tearing etc. homoenergetic that the friction leads to are improved.

To sum up, the utility model discloses a beneficial technological effect does:

1. the feeding device capable of pushing the cutting machine body to slide is arranged to push the cutting machine body and the pipeline to feed synchronously, so that continuous production of the whole assembly line is guaranteed, and the continuity of the whole assembly line is improved;

2. by arranging the adjusting ring, the worm wheel and the worm, two driving mechanisms can be synchronously controlled by one driving motor, so that the energy consumption is saved, and the feeding stability of the cutting machine body is also improved;

3. by installing the hollow shaft sleeve and conveying high-pressure air through the air pump, an air film is formed between the shaft sleeve and the adjusting ring, so that the friction force between the shaft sleeve and the adjusting ring is reduced, and the vibration, heating, abrasion and the like caused by friction can be improved;

4. through arranging the hollow guide ring and conveying high-pressure air through the air pump, an air film is formed between the guide ring and the guide rail, so that friction-free and vibration-free smooth movement between the guide ring and the guide rail is realized;

5. through setting up hollow spacing ring to carry high-pressure air through the air pump, form the air film between spacing ring and catch bar, reduce frictional force between the two, then because vibrations, generate heat, wearing and tearing etc. homoenergetic that the friction leads to can improve.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a cross-sectional view of the guide ring of the present invention;

FIG. 3 is a cross-sectional view of the stop collar of the present invention to show the structure of the stop collar and the feeding device;

figure 4 is a cross-sectional view of the pusher of the present invention.

In the figure, 1, a frame; 11. a guide rail; 12. a cutter body; 2. a guide ring; 21. a sliding groove; 22. a sliding block; 23. a second orifice; 24. a second branch pipe; 25. a main pipe; 26. an air pump; 3. a feeding device; 31. a drive mechanism; 32. a push rod; 33. a limiting ring; 34. a third orifice; 35. thirdly, pipe distribution; 36. a first rack; 37. a rotating rod; 38. a first gear; 4. a pusher member; 41. a second gear; 42. a push rod; 43. a second rack; 44. an adjusting ring; 45. a mounting seat; 46. mounting holes; 47. a shaft sleeve; 471. a first orifice; 472. a first branch pipe; 48. a worm gear; 5. an installation table; 51. a drive motor; 52. a worm; 53. and a support table.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, for the utility model discloses a pipeline cutting machine, including frame 1, install two guide rails 11 that are parallel to each other on frame 1, equal slidable mounting has two guide rings 2 on two guide rails 11. The peripheral side walls of two sides of the guide rail 11 are both provided with a sliding groove 21 along the length direction, the guide ring 2 is provided with a sliding block 22 which is connected with the sliding groove 21 in a sliding way, and the sectional area of the sliding groove 21 is larger than that of the sliding block 22.

A cavity is arranged in the guide ring 2, a second throttling hole 23 is formed in the inner peripheral side wall of the guide ring 2, a second branch pipe 24 communicated with the inner cavity of the guide ring 2 is further connected to the guide ring 2, one end, far away from the guide ring 2, of the second branch pipe 24 is connected to a main pipe 25 and communicated with the main pipe 25, and the main pipe 25 is communicated with an air pump 26 fixedly installed on the ground on one side of the rack 1. The guide ring 2 is fixedly provided with a cutting machine body 12 for clamping and annularly cutting the pipeline.

As shown in fig. 1 and 3, a feeding device 3 for driving the cutter body 12 to slide along the guide rail 11 is further mounted on the frame 1, the feeding device 3 includes two driving mechanisms 31, and the two driving mechanisms 31 are respectively mounted on the frame 1 on the same side of the two guide rails 11. The driving mechanism 31 comprises a push rod 32 used for pushing the cutting machine body 12, one end of the push rod 32 is fixedly connected with the cutting machine body 12, a limiting ring 33 is further mounted on the push rod 32 in a sliding mode, and the limiting ring 33 is fixedly mounted on the rack 1 below the push rod 32.

And a cavity is arranged in the limit ring 33, a third throttling hole 34 communicated with the inner cavity of the limit ring 33 is formed in the inner peripheral side wall of the limit ring 33, a third branch pipe 35 communicated with the inner cavity of the limit ring 33 is further installed on the limit ring 33, and one end, far away from the limit ring 33, of the third branch pipe 35 is connected to the main pipe 25 and communicated with the main pipe 25.

The other ends of the two push rods 32 are respectively provided with a first rack 36 along the length direction on the side wall close to one side, and two rotating rods 37 are vertically and rotatably arranged on the rack 1 between the two first racks 36. Two rotating rods 37 are fixedly sleeved with a first gear 38, and the two first gears 38 are respectively meshed with a first rack 36.

A pushing piece 4 for pushing the first gear 38 to rotate is also arranged on the frame 1 between the two rotating rods 37.

As shown in fig. 3 and 4, the pushing member 4 includes a second gear 41 fixedly sleeved on the rotating rod 37, a pushing rod 42 is further mounted on the frame 1 on one side of the rotating rod 37, a second rack 43 is mounted on a side wall of the pushing rod 42 close to one side of the second gear 41 along the length direction, and the second rack 43 is engaged with the second gear 41. And external threads are arranged at one ends of the two push rods 42 far away from the second rack 43, and the screwing directions of the external threads on the two push rods 42 are opposite. Adjusting rings 44 are connected to the two push rods 32 through threads, and inner threads with opposite screwing directions at two ends are arranged on the inner walls of the adjusting rings 44.

Install two mount pads 45 on the frame 1, all seted up mounting hole 46 on two mount pads 45, equal fixed mounting has hollow axle sleeve 47 in two mounting holes 46. A first throttle hole 471 communicated with the inner cavity of the shaft sleeve 47 is formed in the inner side wall of the shaft sleeve 47, a first branch pipe 472 communicated with the inner cavity of the shaft sleeve 47 is further connected to the shaft sleeve 47, and one end, far away from the shaft sleeve 47, of the first branch pipe 472 is connected to the main pipe 25 and communicated with the main pipe 25.

The adjusting ring 44 has two ends respectively located in the axial holes of a shaft sleeve 47 and is rotatably connected with the shaft sleeve 47. A worm gear 48 is fixedly sleeved on the adjusting ring 44 between the two mounting seats 45. The mounting table 5 is mounted on the rack 1 on one side of the worm wheel 48, the driving motor 51 is fixedly mounted on the mounting table 5, the worm 52 meshed with the worm wheel 48 is fixedly mounted on the rotating shaft of the driving motor 51, and one end, far away from the driving motor 51, of the worm 52 is rotatably connected with the supporting table 53 fixedly mounted on the rack 1.

The implementation principle of the embodiment is as follows:

the pipeline gets into in the cutting machine body 12 to cut after being cut by cutting machine body 12 centre gripping, and the new pipeline of continuous extrusion moulding is still being gone forward this moment in process, and conveyor is also being ceaselessly transporting new pipeline to cutting machine body 12 department, then if cutting machine body 12 is fixed different this moment, then can take place to interfere with new pipeline. At this time, the feeding device 3 needs to drive the cutting machine body 12 and the pipeline to feed synchronously, so that the relative position of the cutting machine body 12 and the pipeline does not change, and the pipeline does not interfere with the cutting machine body 12.

The driving motor 51 is started, the driving motor 51 drives the worm 52 to rotate, the worm 52 rotates, the worm wheel 48 meshed with the worm 52 also rotates, and the worm wheel 48 drives the adjusting ring 44 to rotate. In the process, the support base 53 forms a support for the worm 52 to improve the rotational stability of the worm 52, while the mount 45 can support and limit the adjusting ring 44 to improve the rotational stability of the worm wheel 48 and the adjusting ring 44.

In the process, the air pump 26 pumps the high-pressure air pump 26 into the first branch pipe 472 through the main pipe 25, and pumps the high-pressure air pump 26 into the cavity of the shaft sleeve 47 through the first branch pipe 472, the high-pressure air in the cavity of the shaft sleeve 47 is sprayed out through the first throttling hole 471, so that an air film is formed in a gap between the adjusting pipe and the shaft sleeve 47, non-contact lubrication is achieved, the adjusting pipe and the shaft sleeve 47 are less in abrasion due to the fact that no friction exists between the adjusting pipe and the shaft sleeve 47, and vibration, heat generation, abrasion and the like caused by the friction can be improved.

Because the adjusting ring 44 is provided with internal threads with opposite screwing directions at two ends and the two pushing rods 42 are provided with external threads with opposite screwing directions, when the adjusting ring 44 is rotated, the two pushing rods 42 in threaded connection with the adjusting ring 44 are pushed by the threads of the adjusting ring 44 to be close to each other or to be far away from each other.

When the pipeline is cut, the adjusting ring 44 is rotated to push the two pushing rods 42 to move away from each other, the pushing rods 42 drive the first gear 38 to rotate through the meshing of the second rack 43 and the second gear 41, and push the push rod 32 to slide along the limiting ring 33 through the meshing of the first gear 38 and the first rack 36, so that the push rod 32 can push the cutter body 12 to synchronously feed with the pipeline; when the pipe cutting is completed, the adjusting ring 44 is rotated to pull the two pushing rods 42 to approach each other, so as to pull the cutter body 12 to return to the original position, and when the length of the pipe reaches the predetermined length, the next pipe cutting is performed.

When the push rod 32 slides along the limit ring 33, the air pump 26 can pump the high-pressure air into the limit ring 33 through the third branch pipe 35 and eject the high-pressure air through the third orifice 34 to form an air film in the gap between the limit ring 33 and the push rod 42, so that no friction force exists between the limit ring 33 and the push rod 42, and vibration, heat generation, abrasion and the like caused by friction can be improved.

On the other hand, when the cutter body 12 slides along the guide rail 11, the cutter body 12 is heavy and needs to slide back and forth frequently, so that the friction force with the guide rail 11 is large and the power loss is also large. The air pump 26 is capable of pumping high-pressure air into the guide ring 2 through the second branch pipe 24 and discharging the air through the second orifice 23 to form an air film between the guide ring 2 and the guide rail 11, and realizes smooth movement between the guide ring 2 and the guide rail 11 without friction and vibration by a gas dynamic-static pressure effect, and has less pollution and high precision compared with a general guide rail 11. The sliding connection between the sliding groove 21 and the sliding block 22 can improve the sliding stability of the cutter body 12.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a pipeline cutting machine, includes frame (1), install cutting machine body (12), its characterized in that on frame (1): still install on frame (1) and be used for the drive feed arrangement (3) of cutting machine body (12) motion, feed arrangement (3) include fixed mounting guide rail (11) on frame (1), slidable mounting has on guide rail (11) cutting machine body (12), guide rail (11) one side install on frame (1) and be used for the drive actuating mechanism (31) of cutting machine body (12), actuating mechanism (31) are including being used for promoting push rod (32) of cutting machine body (12), push rod (32) with cutting machine body (12) link to each other, slidable mounting has a plurality of spacing rings (33) on push rod (32), spacing ring (33) fixed mounting is in on frame (1), push rod (32) are kept away from the one end of cutting machine body (12) is provided with first rack (36), the rack (1) on one side of the first rack (36) is further rotatably provided with a rotating rod (37), the rotating rod (37) is fixedly provided with a first gear (38) meshed with the first rack (36), and the rack (1) is further provided with a pushing piece (4) used for pushing the first gear (38) to rotate.

2. The pipe cutting machine according to claim 1, wherein: the number of the guide rails (11) is two, and the driving mechanisms (31) are arranged on the rack (1) on the same side of the guide rails (11).

3. The pipe cutting machine according to claim 2, wherein: the pushing piece (4) comprises a second gear (41) fixedly mounted on the rotating rod (37), a pushing rod (42) is mounted on the rack (1) on one side of the second gear (41), a second rack (43) meshed with the second gear (41) is arranged on the pushing rod (42), an adjusting ring (44) is connected to one end, far away from the second rack (43), of the pushing rod (42) in a threaded mode, inner threads with opposite screwing directions at two ends are arranged in the adjusting ring (44), and outer threads with opposite screwing directions are arranged on the two pushing rods (42) respectively.

4. A pipe cutting machine according to claim 3, characterized in that: still install mount pad (45) on frame (1), mount pad (45) with adjustable ring (44) rotate and connect, just fixed cover has connect worm wheel (48) on adjustable ring (44), worm wheel (48) one side still install mount table (5) on frame (1), fixed mounting has driving motor (51) on mount table (5), fixed mounting has in the pivot of driving motor (51) with worm (52) of worm wheel (48) meshing, just worm (52) are kept away from driving motor's (51) one end is rotated and is installed brace table (53), brace table (53) with frame (1) is fixed continuous.

5. The pipe cutting machine according to claim 4, wherein: the mounting seat (45) is provided with a mounting hole (46), a hollow shaft sleeve (47) is mounted in the mounting hole (46), the shaft sleeve (47) is connected with a first branch pipe (472), one end, far away from the shaft sleeve (47), of the first branch pipe (472) is connected to the main pipe (25), and the main pipe (25) is connected with an air pump (26); the inner circumferential side wall of the shaft sleeve (47) is provided with a first throttling hole (471), the first throttling hole (471) is communicated with an inner cavity of the shaft sleeve (47), and the adjusting ring (44) is located in a shaft hole of the shaft sleeve (47).

6. The pipe cutting machine according to claim 5, wherein: install on cutting machine body (12) with guide rail (11) sliding connection's guide ring (2), be equipped with the cavity in guide ring (2), just second orifice (23) have been seted up on the interior circumference lateral wall of guide ring (2), still install the second on guide ring (2) and divide pipe (24), the second divide pipe (24) with be responsible for (25) and be linked together.

7. The pipe cutting machine according to claim 6, wherein: the guide rail (11) is provided with a sliding groove (21) along the length direction, the inner peripheral side wall of the guide ring (2) is further provided with a sliding block (22), the sliding block (22) is in sliding connection with the sliding groove (21), and the sectional area of the sliding groove (21) is larger than that of the sliding block (22).

8. The pipe cutting machine according to claim 5, wherein: be equipped with the cavity in spacing ring (33), just be connected with the third on spacing ring (33) and divide pipe (35), the third divide pipe (35) with be responsible for (25) and be linked together, third orifice (34) have been seted up on the interior circumference lateral wall of spacing ring (33).