CN221066432U - Pipe rotary cutting equipment and pipe extrusion production line - Google Patents

Abstract

The utility model relates to the technical field of pipe rotary cutting equipment, in particular to pipe rotary cutting equipment and a pipe extrusion production line. The pipe rotary cutting equipment comprises a frame, a clamp mechanism and a rotary cutting mechanism, wherein the rotary cutting mechanism comprises a cutter assembly and a feeding assembly, the cutter assembly surrounds the pipe, the feeding assembly is used for controlling the cutter assembly to be close to or far away from the pipe, the pipe is rotary-cut when the cutter assembly is close to the pipe, the clamp mechanism, the rotary cutting mechanism and the pipe are arranged in a relatively static mode in the axial direction, the cutter assembly surrounds the pipe, so that a notch is smooth, the feeding assembly is further arranged, the feeding and withdrawal of the cutter assembly can be controlled, the driving piece can be prevented from being directly arranged on the cutter assembly to cause wire winding, and the cutting mode can be more flexible.

Description

Pipe rotary cutting equipment and pipe extrusion production line

Technical Field

The utility model relates to the technical field of pipe rotary cutting equipment, in particular to pipe rotary cutting equipment and a pipe extrusion production line.

Background

The heat shrinkage pipe is produced through an extrusion process, in the initial stage of molding extrusion (namely, materials come out of a die and enter a traction stage), continuous pressure is provided for molten materials through rotation of a screw extruder to serve as extrusion power, the extrusion head extrudes the pipe, the pipe is cooled through a water tank under the action of the traction machine until being conveyed to the next working section for fixed-length cutting, and the general cutting equipment often has the problems of uneven notch, uneven length and the like because the pipe is always in a motion state, secondary pipe repair is often needed, raw material and manpower are wasted, and the pipe rotary cutting equipment is designed aiming at the situation.

Disclosure of utility model

The utility model mainly aims to provide pipe rotary cutting equipment, and aims to solve the technical problems of uneven incisions and uneven lengths of the traditional pipe rotary cutting equipment.

In order to achieve the above object, the present utility model provides a pipe rotary cutting apparatus for cutting a pipe, comprising:

a frame;

The clamp mechanism is arranged on the rack and provided with a first channel for a pipe to pass through, and is used for clamping the pipe passing through the first channel;

The rotary cutting mechanism is arranged on the rack and adjacent to the clamp mechanism, the rotary cutting mechanism is provided with a second channel for a pipe to pass through, the first channel and the second channel are communicated, the rotary cutting mechanism comprises a cutter assembly and a feeding assembly arranged adjacent to the cutter assembly, the cutter assembly is arranged around the pipe, and the feeding assembly is used for controlling the cutter assembly to be close to or far away from the pipe and rotating the pipe when the cutter assembly is close to the pipe;

wherein, when the cutter assembly peels off the pipe, the clamp mechanism, the peeling mechanism and the pipe are relatively static in the axial direction.

Optionally, the rotary cutting mechanism further comprises a rotating assembly, the rotating assembly comprising:

The rotating seat is arranged on the frame, and the middle part of the rotating seat is communicated;

the small belt wheel is arranged on the rotating seat;

The cutter assembly is arranged at the edge of the large belt wheel in a sliding manner;

The first driving piece is arranged on the rotating seat, the small belt wheel is fixedly connected to the output end of the first driving piece, the first driving piece drives the small belt wheel to rotate and drives the large belt wheel to rotate, and then the cutter assembly is driven to rotate around the pipe.

Optionally, the feeding assembly comprises:

the second driving piece is arranged on the frame;

the outer ring is movably connected to the rotating seat and is fixedly connected to the output end of the second driving piece, a second pipe penetrating channel is arranged in the middle of the outer ring, and the first pipe penetrating channel and the second pipe penetrating channel are communicated to form the second channel;

The inner wheel is arranged in the second pipe penetrating channel and is in sliding butt with the inner wall surface of the outer ring, one end, away from the outer ring, of the central shaft of the inner wheel is slidably connected with the large belt wheel, so that the second driving piece drives the outer ring to axially move so as to drive the inner wheel to axially move, and further the cutter assembly is driven to be close to or far away from the pipe.

Optionally, the outer ring is a conical ring, the inner wheel is a conical wheel, the conical wheel has an outer conical surface, and the conical ring has an inner conical surface matched with the outer conical surface of the conical wheel, so that the second driving piece drives the conical ring to axially move so as to drive the conical wheel to axially and radially move.

Optionally, the cutter assembly comprises:

the cutter track seat is fixedly arranged at the edge of the large belt wheel;

The cutter rail is arranged on the cutter rail seat in a sliding manner;

The cutter is fixedly arranged on the cutter rail, and the central shaft of the inner wheel is fixedly arranged on the cutter rail, so that the feeding assembly is close to or far away from the pipe through the cutter rail.

Optionally, the clamp mechanism includes:

the clamp seat is arranged on the rack, and the middle part of the clamp seat is communicated to form an accommodating space;

The third driving piece is arranged on the clamp seat;

The upper clamp is arranged in the accommodating space and is connected with the output end of the third driving piece;

And the lower clamp is arranged in the accommodating space, and the upper clamp and the lower clamp are enclosed to form the first channel.

Optionally, two clamp mechanisms are provided, and the two clamp mechanisms are arranged at two sides of the rotary cutting mechanism at intervals.

Optionally, a first pipe fixing part is arranged at one end of the upper clamp, which is close to the lower clamp; and/or one end of the lower clamp, which is close to the upper clamp, is provided with a second pipe fixing piece.

Optionally, the rack comprises a base and a platform; the platform sliding connection in the base, anchor clamps mechanism, rotary-cut mechanism locate the platform, anchor clamps mechanism, rotary-cut mechanism can follow the removal of tubular product is removed, so that the cutter subassembly rotary-cut when tubular product, anchor clamps mechanism, rotary-cut mechanism and tubular product are in axial direction static relatively.

The utility model also provides a pipe extrusion production line, which comprises the following steps:

an extruder; and

The pipe rotary cutting apparatus of any one of the preceding claims, disposed downstream of the extruder.

According to the technical scheme, the pipe rotary cutting equipment comprises the frame, the clamp mechanism and the rotary cutting mechanism, when the cutter assembly is used for rotary cutting of the pipe, the clamp mechanism, the rotary cutting mechanism and the pipe are arranged relatively static in the axial direction, the cutter assembly is arranged around the pipe, so that a cut is smooth, the feeding assembly is further arranged, the feeding and withdrawal of the cutter assembly can be controlled, the wire winding caused by the fact that the driving piece is directly arranged on the cutter assembly can be avoided, and the cutting mode is flexible.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a pipe rotary cutting apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic perspective view of a rotary cutting mechanism according to an embodiment of the pipe rotary cutting apparatus of the present utility model;

FIG. 3 is a schematic structural view of a pipe rotary cutting apparatus according to another embodiment of the present utility model, and a schematic structural view of the pipe rotary cutting apparatus at position B;

FIG. 4 is a schematic cross-sectional view of a rotary cutting mechanism of a rotary cutting apparatus for pipe material according to the present utility model;

FIG. 5 is a schematic view of a clamp mechanism of an embodiment of the pipe rotary cutting apparatus of the present utility model;

Fig. 6 is a schematic view of a frame structure of an embodiment of the pipe rotary cutting apparatus of the present utility model.

Reference numerals illustrate:

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The heat shrinkage pipe is produced through an extrusion process, in the initial stage of molding extrusion (namely, materials come out of a die and enter a traction stage), continuous pressure is provided for molten materials through rotation of a screw extruder to serve as extrusion power, the extrusion head extrudes the pipe, the pipe is cooled through a water tank under the action of the traction machine until being conveyed to the next working section for fixed-length cutting, and the general cutting equipment often has the problems of uneven notch, uneven length and the like because the pipe is always in a motion state, secondary pipe repair is often needed, raw material and manpower are wasted, and the pipe rotary cutting equipment is designed aiming at the situation.

Referring to fig. 1 to 6, the present utility model provides a pipe rotary cutting apparatus, which includes a frame 1, a fixture mechanism 2 and a rotary cutting mechanism 3, wherein the fixture mechanism 2 is disposed on the frame 1 and is provided with a first channel for a pipe 4 to pass through, and the fixture mechanism 2 is used for clamping the pipe 4 passing through the first channel. The rotary cutting mechanism 3 is arranged on the frame 1 and is adjacent to the clamp mechanism 2, the rotary cutting mechanism 3 is provided with a second channel for the pipe 4 to pass through, the first channel is communicated with the second channel, the rotary cutting mechanism 3 comprises a cutter assembly 311 and a feeding assembly 32 adjacent to the cutter assembly 311, the cutter assembly 311 is arranged around the pipe 4, the feeding assembly 32 is used for controlling the cutter assembly 311 to be close to or far away from the pipe 4, and the pipe 4 is rotary-cut when the cutter assembly 311 is close to the pipe 4. Wherein, when cutter assembly 311 rotates pipe 4, fixture mechanism 2, rotary cutting mechanism 3 and pipe 4 are static relatively in the axial direction. Through setting up fixture mechanism 2, rotary-cut mechanism 3 and tubular product 4 relatively static in the axial direction, and cutter subassembly 311 sets up around tubular product 4 for the incision is level and smooth, further sets up feed subassembly 32, can control the feed and the withdrawal of cutter subassembly 311, both can avoid directly setting up the driving piece in cutter subassembly 311 and lead to the electric wire winding, can make the cutting mode more nimble again.

Defining the advancing direction of the pipe 4 as an X axis, the extending direction of the clamp mechanism 2 as a Z axis, the directions perpendicular to the Z axis and the X axis as Y axes, the intersection point of the X axis, the Y axis and the Z axis as an origin point O, and the three axes and the origin point O together form a space rectangular coordinate system O-XYZ, wherein the description of each embodiment is carried out by taking the coordinate system as an azimuth standard.

It will be appreciated that, since the pipe 4 is in motion from the last station to the rotary cutting apparatus, if the cutter assembly 311 rotates the pipe 4, the rotary cutting mechanism 3 and the pipe 4 have relative motion in the X-axis direction, which may cause the cutter assembly 311 to cut the pipe 4, the cut becomes uneven, and even requires secondary repair. To solve this problem, the gantry 1 is provided as a device movable along the X-axis. In this embodiment, please refer to fig. 6, the rack 1 includes a base 11 and a platform 12, the platform 12 is slidably connected to the base 11, in order to make the sliding effect of the platform 12 on the base 11 better, one end of the platform 12 and one end of the base 11 are slidably connected in a track, and the other end is slidably connected in a pulley. It will be appreciated that the platform 12 is a square plate, the square plate has two sides parallel to the X axis, one side close to the base 11 is fixedly provided with a sliding table slider, the base 11 is relatively provided with a sliding table track, and the other side close to the base 11 is fixedly provided with a pulley. The pulley slides on platform 12, and the slip table slider slides on the slip table track, and two sliding connection modes combine together to make the slip effect better. Of course, there are other sliding connection modes, and the invention is not limited thereto.

It will be appreciated that the pipe 4 is produced by an extrusion process, after exiting the extruder, passes through the first channel of the clamp mechanism 2 and then passes through the second channel of the rotary cutting mechanism 3, the clamp mechanism 2 clamps the pipe 4, the moving pipe 4 moves forward along the X-axis through the rail and the pulley driving platform 12, the pipe 4 and the clamp mechanism 2 and the rotary cutting mechanism 3 mounted on the platform 12 are relatively stationary in the X-axis direction, and after being pushed to the set position, the feeding assembly 32 controls the cutter assembly 311 to approach the pipe 4 to complete feeding, and simultaneously the cutter assembly 311 rotates around the pipe 4 to complete rotary cutting so as to ensure the end surface flatness and length stability of the cut pipe 4. In order to ensure the resetting of the platform 12, the resetting may be performed by using an air cylinder, or an extension spring may be installed between the platform 12 and the upstream station for resetting, or other manners may be adopted, which are not limited herein.

To further enhance the rotatability of the cutter assembly 311 around the tubing 4, in one embodiment, referring to fig. 1 and 2 in combination, the rotary cutting mechanism 3 further includes a rotating assembly 31, the rotating assembly 31 including a rotating seat 312, a small pulley 313, a large pulley 314, and a first drive member 315. The rotating seat 312 is arranged on the frame 1, and the middle part of the rotating seat 312 is communicated. A small pulley 313 is provided on the swivel base 312. The large belt pulley 314 is arranged in the middle of the rotating seat 312, the middle of the large belt pulley 314 penetrates through to form a first pipe penetrating channel 314A, and the cutter assembly 311 is slidably arranged at the edge of the large belt pulley 314. The first driving member 315 is disposed on the rotating seat 312, the small belt wheel 313 is fixedly connected to the output end of the first driving member 315, the first driving member 315 drives the small belt wheel 313 to rotate, drives the large belt wheel 314 to rotate, and further drives the cutter assembly 311 to rotate around the pipe 4.

It can be appreciated that the small belt wheel 313 is arranged on the rotating seat 312 and is connected with the output end of the first driving member 315, the large belt wheel 314 is arranged in the middle of the rotating seat 312 through a bearing, the middle of the large belt wheel 314 penetrates through to form a first pipe penetrating channel 314A for the pipe 4 to penetrate, the cutter assembly 311 is slidably arranged on the edge of the large belt wheel 314, the small belt wheel 313 is driven to rotate by the first driving member 315, the small belt wheel 313 drives the large belt wheel 314 to rotate along the center of the pipe 4 through a belt, and then the cutter assembly 311 is driven to rotate around the pipe 4.

To prevent the cutter assembly 311 from rotating around the pipe 4, the drive member directly controls the cutter assembly 311 to feed and retract resulting in entanglement of the wires, and in one embodiment, referring to fig. 2 and 4 in combination, the feed assembly 32 includes a second drive member 321, an outer ring, and an inner ring. The second driving member 321 is disposed on the frame 1. The outer ring is movably connected to the rotating seat 312 and is fixedly connected to the output end of the second driving member 321, a second pipe penetrating channel 322A is arranged in the middle of the outer ring, and the first pipe penetrating channel 314A and the second pipe penetrating channel 322A are communicated to form the second channel. The inner wheel is arranged in the second pipe penetrating channel 322A and is in sliding contact with the inner wall surface of the outer ring, one end of the central shaft of the inner wheel, which is far away from the outer ring, is connected with the large belt pulley 314 in a sliding manner, so that the second driving piece 321 drives the outer ring to axially move to drive the inner wheel to axially move, and then the cutter assembly 311 is driven to be close to or far away from the pipe 4.

It will be appreciated that the outer ring and the rotating seat 312 may be connected by sliding a sliding rail and a sliding block, or by other moving connection methods such as a rail and a ball, which are not limited herein, so long as the relative movement between the two is achieved.

To increase the flexibility of the outer and inner ring control cutter assembly 311, the outer ring is a conical ring 322, the inner ring is a conical wheel 323, the conical wheel 323 has an outer conical surface, and the conical ring 322 has an inner conical surface matched with the outer conical surface of the conical wheel 323, so that the second driving member 321 drives the conical ring 322 to axially move to drive the conical wheel 323 to axially and radially move. Specifically, in one embodiment, referring to FIG. 1, the cross-sectional area of the tapered ring 322 along the direction of travel of the pipe 4 decreases and the cross-sectional area of the tapered wheel 323 along the direction of travel of the pipe 4 increases.

It will be appreciated that the movable connection between the tapered ring 322 and the swivel base 312 is achieved by a tapered ring slide 324, and with particular reference to FIG. 2, the tapered ring slide 324 includes a tapered ring connector 3241, a tapered ring track 3242, a tapered ring track base 3243 and a tapered ring track base mounting block 3244. The conical ring track seat mounting block 3244 is arranged on the rotary seat 312, the conical ring track seat 3243 is fixedly connected to the conical ring track seat mounting block 3244, one end of the conical ring connecting piece 3241 is fixedly connected to the conical ring 322, and the other end of the conical ring connecting piece 3241 is slidably connected to the conical ring track seat 3243 through the conical ring track 3242. To further improve the reliability of the mobile connection, two sets of tapered ring slides 324 are symmetrically disposed in the middle of the tapered ring 322. Of course, the moving connection between the conical ring 322 and the rotating seat 312 may be other moving connection such as a track and a ball, and is not limited herein, as long as the relative movement between the two is achieved.

It will be appreciated that the clamp mechanism 2, the feed assembly 32 and the rotating assembly 31 are sequentially arranged along the travelling direction of the pipe 4, the pipe 4 is produced by extrusion, after exiting the extruder, the pipe passes through the first channel of the clamp mechanism 2, then passes through the second pipe passing channel 322A of the conical ring 322 of the feed assembly 32, then passes through the first pipe passing channel 314A of the large belt pulley 314 of the rotating assembly 31, and the cutter assembly 311 is arranged at the edge of the large belt pulley 314 and is positioned between the conical ring 322 of the feed assembly 32 and the large belt pulley 314 of the rotating assembly 31, so that the pipe can be controlled by the feed assembly 32 and the rotating assembly 31, and the cutter assembly 311 can be controlled to be close to or far away from the pipe 4 and rotate around the pipe 4 at the same time. Further, the cutter assembly 311 is indirectly controlled to be close to or far from the pipe 4 by the tapered ring 322 and the tapered wheel 323, so that the condition of wire entanglement and the like caused by directly controlling the cutter assembly 311 by a driving member can be avoided.

To increase the sensitivity of the cutter assembly 311 toward or away from the tubing 4, in one embodiment, referring in conjunction with fig. 3, the cutter assembly 311 includes a cutter track seat 3111, a cutter track 3112, and a cutter 3113. The cutter track seat 3111 is fixedly provided at the edge of the large pulley 314. The cutter track 3112 is slidably disposed on the cutter track seat 3111. The cutter 3113 is fixedly provided to the cutter track 3112, and the inner wheel center shaft is fixedly provided to the cutter track 3112 so that the feed assembly 32 approaches or moves away from the tube 4 through the cutter track 3112.

It will be appreciated that when the inner wheel is the cone wheel 323, the cone wheel 323 moves along the generatrix direction of the inner wall surface of the cone ring 322 due to the existence of the cone surface, that is, the cone wheel 323 moves along the X axis direction and the Y axis direction under the driving of the cone ring 322, and also rotates along the cone ring 322 in the OYZ plane. The cone pulley 323 is connected with the central shaft through a bearing and is fixed on the cutter track 3112 through a cone pulley seat 3231, the second driving piece 321 drives the cone pulley 322 to move along the X-axis direction so as to drive the cone pulley 323 to move along the X-axis direction and the Y-axis direction, the cone pulley seat 3231 is accelerated to move along the Y-axis direction, the cone pulley seat 3231 drives the cutter track 3112 to slide on the cutter track seat 3111, the cutter 3113 and the cone pulley 323 are fixedly connected on the cutter track 3112, and therefore the cutter track 3112 drives the cutter 3113 to approach or depart from the pipe 4 along the Y-axis direction, and meanwhile the cone pulley 323 also rotates around the pipe 4 along the cutter track 3112. The tapered wheel 323 can be arranged to cooperate with the tapered ring 322 to change the displacement of the cutter assembly 311 in the Y-axis direction, and can also be rotated about the central axis by a bearing to better rotate and slide on the inner wall surface of the tapered ring 322. Of course, instead of using a driving member to effect the resetting of the cutter 3113, an extension spring may be provided between the conical ring track seat mounting block 3244 and the cone pulley seat 3231 for resetting.

In order to increase the clamping force on the pipe 4, in one embodiment, referring to fig. 5 in combination, the clamp mechanism 2 includes a clamp seat 21, a third drive 24, an upper clamp 22, and a lower clamp 23. The clamp seat 21 is arranged on the frame 1, and the middle part of the clamp seat 21 is communicated to form an accommodating space. The third driving member 24 is disposed on the holder 21. The upper clamp 22 is disposed in the accommodating space and is connected to the output end of the third driving member 24. The lower clamp 23 is arranged in the accommodating space, and the upper clamp 22 and the lower clamp 23 enclose to form a first channel.

It will be appreciated that the third drive member 24 moves the upper clamp 22 up and down in the Y-axis direction to loosen or clamp the pipe 4. Of course, the third driving member 24 may also be disposed at the lower end of the holder base 21 to control the movement of the lower clamp 23 along the Y-axis direction. Of course, a driving member may be provided at each of the upper and lower ends of the holder 21 to control the movement of the upper and lower jigs 22 and 23 in the Y-axis direction, respectively.

The first driving member 315, the second driving member 321, and the third driving member 24 in the present utility model may be driving structures such as a cylinder, a small linear motor, and an electric push rod, which are not limited only herein.

In order to further improve the clamping capability of the clamp mechanism 2 on the pipe 4, two clamp mechanisms 2 are arranged, and the two clamp mechanisms 2 are arranged at two sides of the rotary cutting mechanism 3 at intervals.

To accommodate different pipe diameters, a first pipe fixing member 221 is provided at one end of the upper clamp 22 adjacent to the lower clamp 23. And/or, the end of the lower clamp 23 adjacent to the upper clamp 22 is provided with a second pipe fixing member 231. The sizes of the first pipe fixing piece 221 and the second pipe fixing piece 231 can be changed to adapt to heat shrink pipes of different specifications.

The utility model also provides a pipe extrusion production line (not shown), which comprises an extruder (not shown) and pipe rotary cutting equipment, wherein the specific structure of the pipe rotary cutting equipment refers to the embodiment, and the pipe extrusion production line adopts all the technical schemes of all the embodiments, so that the pipe extrusion production line has at least all the beneficial effects brought by the technical schemes of the embodiments, and is not repeated herein. Wherein, tubular product rotary-cut equipment locates the low reaches of extruder.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A pipe rotary cutting apparatus, comprising:

A frame (1);

The clamp mechanism (2) is arranged on the frame (1) and is provided with a first channel for a pipe (4) to pass through, and the clamp mechanism (2) is used for clamping the pipe (4) passing through the first channel;

The rotary cutting mechanism (3) is arranged on the frame (1) and adjacent to the clamp mechanism (2), the rotary cutting mechanism (3) is provided with a second channel for a pipe (4) to pass through, the first channel and the second channel are communicated, the rotary cutting mechanism (3) comprises a cutter assembly (311) and a feeding assembly (32) arranged adjacent to the cutter assembly (311), the cutter assembly (311) is arranged around the pipe (4), and the feeding assembly (32) is used for controlling the cutter assembly (311) to be close to or far away from the pipe (4) and rotary cutting the pipe (4) when the cutter assembly (311) is close to the pipe (4);

When the cutter assembly (311) rotates the pipe (4), the clamp mechanism (2), the rotary cutting mechanism (3) and the pipe (4) are relatively static in the axial direction.

2. The pipe rotary cutting apparatus as claimed in claim 1, wherein the rotary cutting mechanism (3) further comprises a rotating assembly (31), the rotating assembly (31) comprising:

The rotating seat (312) is arranged on the frame (1), and the middle part of the rotating seat (312) is communicated;

A small belt wheel (313) arranged on the rotating seat (312);

The large belt wheel (314) is arranged in the middle of the rotary seat (312), the middle of the large belt wheel (314) penetrates through to form a first pipe penetrating channel (314A), and the cutter assembly (311) is arranged at the edge of the large belt wheel (314) in a sliding manner;

The first driving piece (315) is arranged on the rotating seat (312), the small belt wheel (313) is fixedly connected to the output end of the first driving piece (315), the first driving piece (315) drives the small belt wheel (313) to rotate, drives the large belt wheel (314) to rotate, and then drives the cutter assembly (311) to rotate around the pipe (4).

3. The pipe rotational atherectomy device of claim 2, wherein the feed assembly (32) comprises:

a second driving member (321) provided on the frame (1);

The outer ring is movably connected to the rotary seat (312) and is fixedly connected to the output end of the second driving piece (321), a second pipe penetrating channel (322A) is arranged in the middle of the outer ring, and the first pipe penetrating channel (314A) and the second pipe penetrating channel (322A) are communicated to form the second channel;

The inner wheel is arranged in the second pipe penetrating channel (322A) and is in sliding butt with the inner wall surface of the outer ring, one end, away from the outer ring, of the central shaft of the inner wheel is connected with the large belt wheel (314) in a sliding mode, so that the second driving piece (321) drives the outer ring to axially move so as to drive the inner wheel to axially move, and then the cutter assembly (311) is driven to be close to or far away from the pipe (4).

4. A pipe rotational atherectomy device as claimed in claim 3, wherein the outer ring is a conical ring (322), the inner wheel is a conical wheel (323), the conical wheel (323) has an outer conical surface, and the conical ring (322) has an inner conical surface matching the outer conical surface of the conical wheel (323), such that the second driver (321) drives the conical ring (322) to move axially to move the conical wheel (323) axially and radially.

5. A pipe rotational atherectomy device as claimed in claim 3, wherein the cutter assembly (311) comprises:

The cutter track seat (3111) is fixedly arranged at the edge of the large belt wheel (314);

A cutter rail (3112) slidably disposed on the cutter rail seat (3111);

And the cutter (3113) is fixedly arranged on the cutter track (3112), and the central shaft of the inner wheel is fixedly arranged on the cutter track (3112), so that the feeding assembly (32) is close to or far away from the pipe (4) through the cutter track (3112).

6. Pipe rotary cutting apparatus according to any one of claims 1-5, wherein the clamping mechanism (2) comprises:

The clamp seat (21) is arranged on the frame (1), and the middle part of the clamp seat (21) is communicated to form an accommodating space;

A third driving member (24) provided on the jig base (21);

An upper clamp (22) arranged in the accommodating space and connected to the output end of the third driving member (24);

and the lower clamp (23) is arranged in the accommodating space, and the upper clamp (22) and the lower clamp (23) enclose to form the first channel.

7. The pipe rotary cutting apparatus as set forth in claim 6, wherein two of the clamp mechanisms (2) are provided, and the two clamp mechanisms (2) are provided at intervals on both sides of the rotary cutting mechanism (3).

8. The pipe rotary cutting apparatus as defined in claim 6, wherein a first pipe fixing member (221) is provided at an end of the upper jig (22) adjacent to the lower jig (23); and/or one end of the lower clamp (23) close to the upper clamp (22) is provided with a second pipe fixing piece (231).

9. The pipe rotary cutting apparatus as claimed in any one of claims 1 to 5, wherein the frame (1) comprises a base (11) and a platform (12); the platform (12) is slidably connected to the base (11), the clamp mechanism (2) and the rotary cutting mechanism (3) are arranged on the platform (12), and the clamp mechanism (2) and the rotary cutting mechanism (3) can move along with the movement of the pipe (4), so that the clamp mechanism (2), the rotary cutting mechanism (3) and the pipe (4) are relatively static in the axial direction when the cutter assembly (311) rotates the pipe (4).

10. A pipe extrusion line comprising an extruder and a pipe rotary cutting apparatus according to any one of claims 1 to 9, said pipe rotary cutting apparatus being provided downstream of said extruder.