CN111014804A

CN111014804A - Pipe cutting machine

Info

Publication number: CN111014804A
Application number: CN201911410048.9A
Authority: CN
Inventors: 李伟; 韦春洪; 李世万; 罗利; 徐鹏翔
Original assignee: Yuzesen Investment Co Ltd
Current assignee: Yuzesen Investment Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-17

Abstract

The invention relates to the field of cutting devices, and particularly discloses a pipe cutting machine which comprises a rack, a driving mechanism, an adjustable clamping mechanism and an adjustable cutting mechanism, wherein the adjustable clamping mechanism comprises an adjustable chuck which is rotatably arranged, one side of the adjustable chuck is rotatably provided with an adjustable limiting seat which is opposite to the circle center of the adjustable chuck, the distance between the adjustable limiting seat and the adjustable chuck can be adjusted, and the adjustable cutting mechanism comprises a cutting knife and an adjusting component for adjusting the position of the cutting knife. The pipe cutting machine can cut pipes with different diameters in fixed length, is convenient to adjust and has a wide application range.

Description

Pipe cutting machine

Technical Field

The invention relates to the field of cutting devices, in particular to a pipe cutting machine.

Background

During installation and laying of natural gas systems, pipelines are indispensable connectors. Because the pipeline is usually of a certain length when leaving a factory, in the actual pipeline laying process, the length requirements of the pipeline are different, and a long pipe needs to be cut into short pipes with specified lengths according to the actual requirements of field construction.

At present, the process of cutting the pipeline is generally completed by using a specific pipe cutting machine, and the pipe cutting machine generally comprises a frame, a clamping and fixing mechanism for fixing the pipeline, a transmission mechanism and a cutting mechanism. When cutting the pipe fitting, fix the pipe fitting in centre gripping fixed establishment, drive centre gripping fixed establishment through drive mechanism and rotate, and then drive the pipe fitting rotation, the pipe fitting is at the in-process of rotation, realizes the cutting process to the pipe fitting through cutting mechanism. But present centre gripping fixed establishment and cutting mechanism are fixed the setting for current pipe cutting machine can only carry out the cutting of single length to the pipe fitting of single diameter, and application scope is restricted.

Disclosure of Invention

The invention aims to provide a pipe cutting machine to solve the problem that the application range of the pipe cutting machine in the prior art is limited.

In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a pipe cutting machine, which comprises a frame, actuating mechanism, regulation formula fixture and regulation formula cutting mechanism, regulation formula fixture is including rotating the regulation formula chuck that sets up, one side of regulation formula chuck is rotated and is provided with and adjusts the spacing seat of the regulation formula of the centre of a circle just to setting up of formula chuck, adjust the adjustable setting of distance between spacing seat of regulation formula and the regulation formula chuck, adjust formula cutting mechanism and include the cutting knife and be used for adjusting the adjusting part of cutting knife position.

The principle and the beneficial effects of the technical scheme are as follows: in the technical scheme, the rack plays a role of integral support and simultaneously ensures stable connection between the devices. Actuating mechanism is used for the drive to adjust formula chuck rotation, during the use, will treat the pipe fitting of cutting and arrange in adjusting formula chuck to make its tip support tightly in adjusting the spacing seat of formula, the adjustable chuck drives the pipe fitting rotation under actuating mechanism's drive, and then can realize the circular cutting process to the pipe fitting through adjusting formula cutting mechanism. Because fixture and spacing seat are adjustable, can realize fixed to the centre gripping of the pipe fitting of different diameters, through the distance between regulation formula chuck and the spacing seat of regulation seat, can realize the regulation to cutting length for the cutting of the pipe fitting of different lengths can be realized to the device, and application range is wide. When the pipe fittings of different diameters are cut, the position of cutting knife can be adjusted in adaptability through the adjusting part, so that effective circular cutting of the pipe fittings of different diameters is guaranteed, and the application range of the device and the diversity of cutting are improved.

Furthermore, one side of the adjustable chuck, which is far away from the adjustable limiting seat, is provided with a supporting mechanism for supporting a workpiece to be cut.

When cutting the pipe fitting, carry out gradual cutting with the long tube usually, adjust the formula chuck and be used for the pipe fitting of fixed cutting section with the spacing seat of regulation formula, and supporting mechanism then is used for supporting the fixed pipe fitting of waiting to cut the section, avoids the uneven production slope of pipe fitting both ends atress, and then has avoided the pipe fitting to influence the precision of cutting because of the slope.

Furthermore, a blanking mechanism is arranged below the adjustable chuck and the adjustable limiting seat.

In this technical scheme, after pipe fitting fixed length cutting, the automatic unloading process of pipe fitting after the accessible unloading mechanism realizes cutting, convenient operation, degree of automation is high.

Furthermore, the driving mechanism comprises a belt pulley which is rotatably connected to the rack, a driving cylinder is fixedly connected to the belt pulley coaxially, and one end, far away from the belt pulley, of the driving cylinder is fixedly connected to the adjustable chuck.

Among this technical scheme, the belt pulley rotates the actuating cylinder that drives coaxial rigid coupling with it and rotates, and the actuating cylinder can drive regulation formula chuck rotation at the rotation in-process, and then drives regulation formula chuck rotation. The regulation formula chuck drives the pipe fitting rotation of waiting to cut, and then realizes the ring-cutting process to the pipe fitting, and the effect that power transmission can be played on the one hand in the setting of driving cylinder, and on the other hand, the inside hollow structure of driving cylinder can also provide the space for wearing to establish and fix of pipe fitting, avoids producing the movement hindrance.

Furthermore, the adjustable chuck comprises a chuck seat and a chuck body, wherein a driving gear is coaxially and fixedly connected to the chuck seat, a plurality of threaded rods are rotatably connected to the chuck seat and are circumferentially and uniformly distributed by taking the circle center of the chuck seat as the center, driving seats in threaded connection with the threaded rods are sleeved on the threaded rods, driving racks meshed with the driving gear are arranged on the side parts of the driving seats, and first inclined teeth are arranged at the tops of the driving seats; chuck body and chuck seat swing joint, and chuck body is last along its radial sliding connection have a plurality of jack catchs, the bottom of jack catch be provided with first skewed tooth meshing's second skewed tooth, spacing hole has all been seted up on chuck seat, drive gear and the chuck body.

In this technical scheme, when regulation formula chuck carries out the card fastening to the pipe fitting regularly, the accessible rotates the chuck seat and realizes adjusting jack catch block diameter. When the clamping diameter needs to be adjusted, an operator rotates the chuck seat, the chuck seat rotates to drive the driving gear which is coaxially and fixedly connected with the chuck seat to rotate, and further drives the driving rack which is meshed with the driving gear to move, the driving rack can drive the driving seat to axially move along the threaded rod in the moving process, and at the moment, the threaded rod automatically rotates; in the process of moving the driving seat, the first helical teeth can drive the second helical teeth meshed with the first helical teeth to move, the jaw is driven to slide along the radial direction of the chuck body, the clamping position of the jaw is adjusted, the diameter of the jaw is adjusted, the clamping device is suitable for clamping pipes of different diameters and is fixed, the application range of the device is enlarged, and power transmission is more stable through the gear, the rack and the threaded rod.

Furthermore, adjust the spacing seat of formula including swing joint the backup pad in the frame, adjust the spacing seat of formula and rotate to connect in the backup pad, and adjust the spacing seat of formula and be cascaded toper seat.

In this technical scheme, the backup pad is used for supporting the position of adjusting the spacing seat of regulation formula, can guarantee that the spacing seat of regulation formula treats that the tip of the pipe fitting of cutting carries out stable support. The adjustable limiting seat is arranged into the stepped conical seat, so that when the pipe fittings with different diameters are fixed, the end parts of the pipe fittings can be clamped at different positions of the conical seat, the conical seat does not need to be replaced according to different diameters of the pipe fittings, and the operation is convenient.

Furthermore, the adjusting part rotates including rotating the cutting pole of connection in the frame, and the last adjusting screw that is connected with of cutting pole rotates, and the last cover of adjusting screw is equipped with threaded connection's cutting seat with it, and cutting seat sliding connection is on the cutting pole, and the cutting knife can be dismantled and connect on the cutting seat.

Among this technical scheme, after the pipe fitting that waits to cut is fixed, the relative frame of cutting rod rotates, make the cutting knife offset with the outer wall of pipe fitting, then accomplish the ring-cutting process of pipe fitting at the in-process of pipe fitting rotation, when the pipe fitting of different diameters is cut to needs, then need adjust the position of cutting knife, rotate accommodate the lead screw this moment, accommodate the lead screw rotates the cutting seat that drives threaded connection with it and follows accommodate the lead screw axial displacement, and then realize the removal of cutting knife position, make the cutting knife can offset with the pipe fitting of different diameters and realize the cutting, the operation is convenient, and adjust in a flexible way.

Furthermore, the supporting mechanism comprises a plurality of fixing rings fixedly connected to the rack, the bottom of each fixing ring is fixedly connected with a vertical supporting rod, and a limiting ring is detachably connected to the inside of each fixing ring.

Among this technical scheme, solid fixed ring is used for the pipe fitting of fixed band cutting, and the spacing collar plays spacing and buffering dual function, sets the spacing collar to detachable connection in the fixed ring, can change not unidimensional spacing collar, convenient operation according to actual need.

Furthermore, the fixing ring is in threaded connection with a tightly-supporting bolt for tightly supporting the limiting ring.

Among this technical scheme, support tight bolt and be used for supporting the inside spacing collar of solid fixed ring, guarantee that the spacing collar can be stable install in the fixed ring, through rotatory adjusting bolt, can realize supporting tight regulation of degree to the spacing collar, when needs dismantle the spacing collar, the counter rotation support tight bolt can, convenient operation.

Further, unloading mechanism includes the lower flitch of the slope setting of rigid coupling in the frame, and the low side of lower flitch is provided with collects the frame.

Among this technical scheme, unloading mechanism is used for carrying out the unloading to the pipe fitting after the cutting, and after the pipe fitting was cut, it can be along the unloading board roll fall collect the frame in, realize automatic collection.

Drawings

FIG. 1 is a front view of a pipe cutter in an embodiment of the present invention;

FIG. 2 is a rear view of FIG. 1;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic view of an adjustable chuck according to an embodiment of the present invention;

FIG. 5 is a schematic view of a chuck base according to an embodiment of the present invention;

FIG. 6 is a schematic view of a chuck body in an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the automatic cutting machine comprises a frame 1, a driving motor 2, an adjustable chuck 3, an adjustable limiting seat 4, a cutting knife 5, a belt pulley 6, a belt 7, a driving cylinder 8, a chuck seat 9, a chuck body 10, a driving gear 11, a threaded rod 12, a driving seat 13, a driving rack 14, first helical teeth 15, a clamping jaw 16, a limiting hole 17, a supporting plate 18, a supporting shaft 19, a cutting rod 20, an adjusting screw rod 21, a cutting seat 22, a hand wheel 23, a fixing ring 24, a supporting rod 25, a fastening bolt 26, a blanking plate 27, a collecting frame 28, a pipe fitting 29 and an electric control switch 30.

The embodiment is basically as shown in the attached figure 1: the utility model provides a pipe cutting machine, includes frame 1, regulation formula fixture, regulation formula cutting mechanism, actuating mechanism, supporting mechanism and unloading mechanism, and frame 1 includes crossbearer and a plurality of rigid couplings are in the perpendicular frame on the crossbearer.

The adjustable clamping mechanism is used to clamp the position defining the tubular 29 to be cut so that it remains stable during the cutting process. The adjustable clamping mechanism comprises a supporting disk fixedly connected to the rack 1, and a driving hole transversely penetrating through the supporting disk is formed in the middle of the supporting disk. An adjustable chuck 3 is rotatably connected on the right side wall of the supporting disk, as shown in the combined drawing of fig. 4-6, the adjustable chuck 3 comprises a chuck seat 9 rotatably connected at the right end of the supporting disk, a chuck body 10 coaxially arranged with the chuck seat 9 is slidably connected in the chuck seat 9, a driving gear 11 is coaxially and fixedly connected on the chuck seat 9, three threaded rods 12 are rotatably connected on the chuck seat 9, the three threaded rods 12 are circumferentially and uniformly distributed by taking the circle center of the chuck seat 9 as the center, the three threaded rods 12 jointly form an equilateral triangle structure, the threaded rods 12 are all sleeved with driving seats 13 in threaded connection with the threaded rods 12, the driving seats 13 and the threaded rods 12 are in a non-self-locking condition (the thread lead angle of the threaded rods 12 is larger than the friction angle or equivalent friction angle of a screw pair driving seat), the inner side parts of the driving seats 13 are all fixedly connected with driving racks 14 meshed with the driving gears 11, and the top parts of the driving seats 13 are all fixedly connected with first inclined teeth 15; three jack catchs 16 are connected with along its radial sliding on the chuck body 10, and the equal rigid coupling in bottom of jack catchs 16 has the second skewed tooth with first skewed tooth 15 meshing, all offers the spacing hole 17 that transversely runs through on chuck seat 9, drive gear 11 and the chuck body 10.

Referring to fig. 2 and 3, two vertical connecting rods are fixedly connected to the right end of the frame 1, supporting rings are fixedly connected to the top ends of the two connecting rods, a horizontal supporting shaft 19 penetrates through the supporting rings, and one end (left end) of the supporting shaft 19, which is far away from the supporting rings, is fixedly connected to the supporting plate. All the cover is equipped with the spacing ring on two back shafts 19, and threaded connection has the fastening bolt who is used for supporting tight back shaft 19 on the spacing ring, and the rigid coupling has backup pad 18 between two spacing rings, and the horizontal rotation is connected with in backup pad 18 just to the regulation formula spacing seat 4 that sets up with the centre of a circle of spacing hole 17, and the spacing seat 4 of regulation formula in this embodiment is cascaded toper seat. When the distance between the adjustable chuck 3 and the adjustable limiting seat 4 needs to be adjusted, the limiting ring can move along the axial direction of the supporting shaft 19 after the fastening bolt is loosened.

The adjustable cutting mechanism is used for cutting a pipe fitting 29 to be cut, the adjustable cutting assembly comprises a cutting rod 20 which is rotatably connected to one of the supporting shafts 19, an adjusting screw rod 21 (vertical in figure 1) is rotatably connected to the cutting rod 20 along the length direction of the cutting rod, a cutting seat 22 which is in threaded connection with the adjusting screw rod 21 is sleeved on the adjusting screw rod 21, the cutting seat 22 is vertically connected to the cutting rod 20 in a sliding mode, and a cutting knife 5 is in threaded connection with the cutting seat 22.

As shown in fig. 2, the driving mechanism is used for driving the pipe 29 to be cut to rotate, the driving mechanism includes a driving motor 2 fixedly connected to the lower end of the frame 1, the left side wall of the supporting disk is rotatably connected with a belt pulley 6, and a belt 7 is wound between the belt pulley 6 and the driving shaft of the driving motor 2. The belt pulley 6 is coaxially and fixedly connected with a driving cylinder 8 which is transversely arranged, and one end of the driving cylinder 8 far away from the belt pulley 6 is fixedly connected on the chuck body 10. An electric control switch 30 for controlling the opening and closing of the driving motor 2 is fixedly connected to the frame 1.

As shown in fig. 2, the supporting mechanism is used for supporting the left end of the pipe fitting 29 to be cut, the supporting mechanism comprises a plurality of vertical supporting rods 25 fixedly connected to the frame 1, the top ends of the supporting rods 25 are fixedly connected with fixing rings 24, and the fixing rings 24 are coaxially arranged with the limiting holes 17 and the driving cylinder 8. A limiting ring (not shown) is embedded in the fixing ring 24, and a fastening bolt 26 for fastening the limiting ring is connected to the fixing ring 24 through a thread.

As shown in fig. 1, a blanking mechanism is arranged below the adjustable chuck 3 and the adjustable limiting seat 4, the blanking mechanism includes a blanking plate 27 fixedly connected to the frame 1, the blanking plate 27 is inclined, and a collecting frame 28 is arranged at the lower end of the blanking plate 27.

The specific implementation process is as follows: when the long pipe is cut into short pipes according to the construction requirement, the pipe fitting 29 is firstly penetrated into the fixing ring 24 from the left end of fig. 2 in sequence, and in the process, the limiting ring in the fixing ring 24 can assist in supporting and ensure the stability of the left end of the pipe fitting 29. Wear to establish the spacing hole 17 of driving cylinder 8 and regulation formula chuck 3 again in proper order with the right-hand member of pipe fitting 29 to wear out spacing hole 17 and finally support and lean on regulation formula spacing seat 4 with the right-hand member of pipe fitting 29, because regulation formula spacing seat 4 is the taper seat, the right-hand member portion of pipe fitting 29 can support tightly on the inclined plane of taper seat this moment.

The left end of the pipe fitting 29 is supported and limited by the fixing ring 24, and the right end of the pipe fitting 29 is limited by the adjusting type chuck 3 and the adjusting type limiting seat 4. After the position of the pipe member 29 is adjusted, the operator adjusts the position of the jaws 16 on the adjustable chuck 3 according to the diameter of the pipe member 29. Specifically, an operator manually rotates the chuck base 9, the chuck base 9 rotates to drive the driving gear 11 coaxially and fixedly connected with the chuck base to rotate, and further drives the driving rack 14 meshed with the driving gear 11 to move, the driving rack 14 can drive the driving base 13 to axially move along the threaded rod 12 in the moving process, and at the moment, the threaded rod 12 and the driving base 13 are in a non-self-locking condition, so that the threaded base 13 can reversely drive the threaded rod 12 to rotate; in the moving process of the driving seat 13, the first helical teeth 15 can drive the second helical teeth engaged with the first helical teeth to move, so as to drive the clamping jaws 16 to radially slide along the chuck body 10, namely, the clamping position of the clamping jaws 16 is adjusted, the clamping diameter of the clamping jaws 16 is adjusted, and the device can be suitable for clamping and fixing pipes 29 with different diameters.

Then, the position of cutting knife 5 is adjusted according to the diameter of cutting pipe fitting 29 to the operating personnel, and is concrete, operating personnel rotates hand wheel 23, and hand wheel 23 rotates and drives adjusting screw 21 fixed connection with it and rotates, and adjusting screw 21 can drive cutting seat 22 of threaded connection with it along the axial displacement of cutting rod 20 at the rotation in-process, slides along the length direction of cutting rod 20 promptly, and the position of waiting to cut knife 5 is just right-hand with the just top of waiting to cut pipe fitting 29 axis, and the position control of cutting knife 5 is ended.

Then operating personnel rotates the relative back shaft 19 of cutting rod 20, make cutting rod 20 become the horizontality by vertical state, make cutting rod 20 span between two back shafts 19, operating personnel presses down hand wheel 23, then open driving motor 2 through electrical control switch 30, driving motor 2's drive shaft passes through belt 7 and drives belt pulley 6 rotation, and then drive driving cylinder 8 and rotate, driving cylinder 8 drives the chuck body 10 rotation of rigid coupling with it at the rotation in-process, chuck seat 9 and chuck body 10 synchronous rotation this moment, chuck body 10 rotates and can drive the pipe fitting 29 rotation of card in it, pipe fitting 29 is at the rotation in-process, the position that the outer wall of pipe fitting 29 and cutting knife 5 contacted can the circumference change, and then make pipe fitting 29 realize the circular cut at the in-process of rotation.

After the cutting is finished, the cut pipe 29 falls on the blanking plate 27, rolls along the inclined blanking plate 27 to the lower end, and finally falls into the collecting frame 28 to realize the automatic collection of the cut pipe 29. After the pipe fitting 29 is cut, an operator pushes the uncut pipe fitting 29 to the right, so that the right end of the pipe fitting 29 abuts against the adjustable limiting seat 4, and then the operations are repeated, so that the continuous cutting process of the pipe fitting 29 is realized.

When the length of cutting needs to be adjusted, operating personnel unscrew fastening bolt back with the spacing ring along the axial displacement of back shaft 19 for the relative regulation formula chuck 3 of backup pad 18 removes, can realize adjusting the regulation of adjusting the distance between formula chuck 3 and the regulation formula spacing seat 4, and when the distance between the two increases, the length increase of pipe fitting 29 cutting.

This technical scheme is because fixture and spacing seat are adjustable, can realize fixed to the centre gripping of the pipe fitting 29 of different diameters, through adjusting the distance between regulation formula fixture and the spacing seat of regulation seat, can realize the regulation to cutting length for the cutting of the pipe fitting 29 of different length can be realized to the device, and application range is wide.

Example 2

This embodiment differs from embodiment 1 only in that: in this embodiment, the left end rigid coupling of frame 1 has the actuating cylinder, and the piston rod of actuating cylinder is electric telescopic handle, and electric telescopic handle's extension length accessible sets up the electric control button control on actuating cylinder, and electric telescopic handle's right-hand member rigid coupling has the scraping wings, and electric telescopic handle can pass solid fixed ring 24.

When cutting one section pipe fitting 29, the extension of operating personnel accessible electric control button control electric telescopic handle for electric telescopic handle's right-hand member moves to the right, and then makes the scraping wings of electric telescopic handle tip promote pipe fitting 29 right, makes the right-hand member of pipe fitting 29 support tightly on adjusting formula spacing seat 4, need not the manual pipe fitting 29 removal that promotes of operating personnel, convenient operation is laborsaving.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a pipe cutting machine, includes frame, actuating mechanism, regulation formula fixture and regulation formula cutting mechanism, its characterized in that: adjusting formula fixture is including rotating the regulation formula chuck that sets up, and one side of adjusting formula chuck is rotated and is provided with and adjusts the spacing seat of the regulation formula that the centre of a circle of formula chuck just is just to setting up, adjusts the spacing seat of distance adjustable setting between formula chuck and the regulation formula chuck, adjust formula cutting mechanism and include the cutting knife and be used for adjusting the adjusting part of cutting knife position.

2. The pipe cutter of claim 1, wherein: one side of the adjustable chuck far away from the adjustable limiting seat is provided with a supporting mechanism for supporting a workpiece to be cut.

3. A pipe cutting machine as claimed in claim 2, wherein: and a blanking mechanism is arranged below the adjustable chuck and the adjustable limiting seat.

4. A pipe cutter as defined in claim 3, wherein: the driving mechanism comprises a belt pulley which is rotatably connected to the rack, a driving cylinder is fixedly connected to the belt pulley in a coaxial mode, and one end, far away from the belt pulley, of the driving cylinder is fixedly connected to the adjustable chuck.

5. The pipe cutter of claim 4, wherein: the adjustable chuck comprises a chuck seat and a chuck body, wherein a driving gear is coaxially and fixedly connected to the chuck seat, a plurality of threaded rods are rotatably connected to the chuck seat and are circumferentially and uniformly distributed by taking the circle center of the chuck seat as the center, driving seats in threaded connection with the threaded rods are sleeved on the threaded rods, driving racks meshed with the driving gear are arranged on the side parts of the driving seats, and first inclined teeth are arranged at the tops of the driving seats; chuck body and chuck seat swing joint, and chuck body is last along its radial sliding connection have a plurality of jack catchs, the bottom of jack catch be provided with first skewed tooth meshing's second skewed tooth, spacing hole has all been seted up on chuck seat, drive gear and the chuck body.

6. The pipe cutter of claim 5, wherein: the adjustable limiting seat comprises a supporting plate movably connected to the rack, the adjustable limiting seat is rotatably connected to the supporting plate, and the adjustable limiting seat is a stepped conical seat.

7. The pipe cutter of claim 6, wherein: the adjusting component comprises a cutting rod which is rotatably connected to the rack, an adjusting screw rod is rotatably connected to the cutting rod, a cutting seat which is connected with the adjusting screw rod in a threaded mode is sleeved on the adjusting screw rod, the cutting seat is slidably connected to the cutting rod, and the cutting knife is detachably connected to the cutting seat.

8. The pipe cutter of claim 7, wherein: the supporting mechanism comprises a plurality of fixing rings fixedly connected to the rack, the bottom of each fixing ring is fixedly connected with a vertical supporting rod, and a limiting ring is detachably connected to the inside of each fixing ring.

9. The pipe cutter of claim 8, wherein: and the fixing ring is in threaded connection with a tightening bolt for tightening the limiting ring.

10. The pipe cutter of claim 9, wherein: the blanking mechanism comprises a blanking plate fixedly connected to the rack and obliquely arranged, and a collecting frame is arranged at the lower end of the blanking plate.