CN219944779U - Pipe fitting cutting device applied to automatic multi-pipe diameter specification replacement - Google Patents

Abstract

The utility model relates to the technical field of pipe cutting, in particular to a pipe cutting device for automatically changing a multi-diameter specification, which comprises a feeding machine, a pipe clamping machine and a pipe cutting machine, wherein the feeding machine, the pipe clamping machine and the pipe cutting machine are sequentially arranged along a processing path, the pipe clamping machine is positioned at the rear side of the feeding machine, the pipe clamping machine comprises at least two groups of circumferentially arrayed clamping claws, the pipe cutting machine is positioned at the rear side of the pipe clamping machine, the pipe cutting machine comprises at least one group of cutters, the cutters move towards a pipe positioned at the central position and rotate to cut the pipe, and the clamping claws and the cutters are mutually matched by utilizing the automatically contracted and expanded clamping claws and the cutters, so that the clamping claws and the cutters can be automatically switched according to the diameter of the pipe, the clamping claws can be automatically stopped when the pipe is contracted to automatically clamp the corresponding pipe, and the cutters can be stopped after the pipe is cut through, so that the aim of processing can be achieved by only one cutting device.

Description

Pipe fitting cutting device applied to automatic multi-pipe diameter specification replacement

Technical Field

The utility model relates to the technical field of pipe cutting, in particular to a pipe cutting device for automatically changing multiple pipe diameter specifications.

Background

The pipe fitting can be used in a large number in the manufacturing industry, the pipe fitting is formed by cutting the pipe fitting with large length, the diameters and the length specification types of different pipe fittings are different, so that the cutting work when the pipe fitting with different specifications is cut is greatly influenced, the working intensity of operators is increased, and the pipe clamping mechanism and the cutting blade are required to be continuously replaced.

In the chinese patent application No. 202211171091.6, specifically, a pipe cutting device and a detection method are disclosed, which belong to the technical field of mechanical cutting, and the pipe cutting device includes: the bottom of the discharging box is provided with a shaping groove for placing a plurality of pipe fittings, the notch of the shaping groove is communicated with the internal cavity of the discharging box, and the shaping groove is provided with a pushing-in port and a pushing-out port; the mobile station is provided with a placing groove for placing the pipe fitting; the ejection mechanism is used for pushing the pipe fitting in the shaping groove to the placing groove from the push-out opening through the withdrawal opening; the cutting table is provided with a cutting groove for placing the pipe fitting, the cutting groove is positioned on one side of the moving table, which is far away from the discharging box, and the moving table is used for moving the pipe fitting in the placing groove into the cutting groove; the cutting device is used for cutting the pipe fitting on the cutting table; and the receiving device is used for receiving the pipe fitting section generated by cutting.

Although the above technical solution specifically discloses a device for cutting a pipe, the cutting device in the above technical solution cannot solve the problem of automatic change of the types of the pipe with multiple specifications.

Disclosure of Invention

According to the pipe fitting cutting device for automatic mold changing of multiple pipe diameter specifications, the clamping claw and the cutter are matched with each other by utilizing the automatic shrinkage and expansion clamping claw, so that the clamping claw and the cutter can be automatically switched according to the diameter of a pipe, the clamping claw automatically stops when the clamping claw is shrunk to automatically clamp the corresponding pipe, the cutter stops moving after cutting through the pipe, and the purpose that the pipe cutting of various types can be realized by only one cutting device is achieved.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a pipe cutting device for automatically changing multiple pipe diameters, comprising:

the feeding machine, the pipe clamping machine, the pipe cutting machine and the discharging machine are sequentially arranged along the processing path;

the feeding machine is connected with the pipe clamping machine and pushes the pipe towards the pipe clamping machine;

the pipe clamping machine is positioned at the rear side of the feeding machine and comprises at least two groups of clamping claws which are arranged in a circumferential array, and the clamping claws synchronously draw in and clamp the pipe towards the pipe positioned at the central position;

the pipe cutting machine is positioned at the rear side of the pipe clamping machine and comprises at least one group of cutters which move towards the pipe at the central position and rotate to cut the pipe;

the discharging machine is connected with the pipe cutting machine, and the discharging machine automatically outputs the pipe fittings cut by the pipe cutting machine.

As an improvement, the feeding machine comprises a feeding frame and a clamping assembly;

the feeding frame is horizontally arranged, and a plurality of groups of rollers are uniformly distributed on the feeding frame;

the clamping assembly is arranged at one end, close to the pipe clamping machine, of the feeding frame and comprises a linear module, a moving seat and clamping jaws, the linear module is parallel to the feeding frame, the moving seat is arranged on the linear module, the moving seat is driven by the linear module to translate, the clamping jaws are arranged on the moving seat, and the clamping jaws are tensioned to grab and pull the pipe.

As an improvement, the feeding machine further comprises a jacking pipe assembly, wherein the jacking pipe assembly is arranged on the movable seat and comprises a pusher, a gear unit, a turnover seat and a jacking rod;

the pusher is vertically arranged on the movable seat and is vertically and downwards pushed;

the gear unit is arranged between the pusher and the overturning seat, and the pusher drives the overturning seat to overturn through the gear unit;

the ejector rod is arranged on the turnover seat, the ejector rod turns over along with the turnover seat, and the ejector rod pushes the tail end of the pipe.

As an improvement, the ejector rod comprises a rod body and a push plate;

one end of the rod body is arranged on the turnover seat, the other end of the rod body is provided with the push plate, and the end part of the rod body, provided with the push plate, is arranged in a conical shape;

the push plate is provided with a plurality of groups around the axial equidistance of the pole body, and the push plate covers the radius setting of the pipe.

As an improvement, the pipe clamping machine further comprises a rotary drum, a swing arm, a guide rod and a driving assembly;

the rotary drum is rotatably arranged, two ends of the rotary drum are respectively provided with a plurality of arc-shaped guide grooves which are arranged in a circumferential array, and the arc-shaped guide grooves are arranged in one-to-one correspondence with the clamping claws;

the swing arms are arranged at the two ends of the rotating drum in a swinging way respectively, the middle parts of the swing arms are connected with the rotating drum through rotating shafts, the swing arms are arranged in a circumferential array way, and the swing arms are connected with the two ends of the clamping claw;

the guide rod is arranged at the other end part of the swing arm relative to the clamping claw, and is inserted into the corresponding arc-shaped guide groove;

the driving assembly comprises a driver and a transmission unit, and the driver drives the rotary drum to rotate through the transmission unit.

As an improvement, an arc-shaped limit groove is formed in the drum body of the rotary drum, and a limit rod which is fixedly arranged is inserted into the limit groove.

As an improvement, the pipe cutting machine further comprises a cutter head, a cutter seat, a reversing block, a pusher and a rotary driver;

the cutter disc is in a circular ring shape, and the cutter is arranged on the radial direction of the cutter disc in a sliding manner through the cutter seat;

the reversing block is arranged on the other side of the cutter disc opposite to the cutter disc, penetrates through the cutter disc and is matched with the cutter disc through an inclined plane, and drives the cutter disc to slide towards the center of the cutter disc;

the pusher is connected with the reversing block, the reversing block is rotatably arranged relative to the pusher, and the pusher drives the reversing block to horizontally push;

the rotary driver is arranged below the cutterhead and drives the cutterhead, the cutter holder and the reversing block to synchronously rotate through the transmission component.

As an improvement, the cutters are symmetrically provided with two groups, and the cutter seat and the reversing block corresponding to the cutters are symmetrically provided with two groups.

As an improvement, the pipe cutting machine further comprises a pipe fitting chuck arranged at the rear side of the cutter head, and the pipe fitting chuck is used for fixing the end part of the pipe to be cut.

As an improvement, the discharging machine comprises a feeding line and a stirring assembly;

the feeding line is parallel to the feeding direction of the pipe;

the material stirring assembly is arranged on the feeding line and comprises a linear module, a material stirring clamping jaw and a material stirring hand, the linear module is parallel to the feeding line, the material stirring clamping jaw is arranged on a sliding plate on the linear module, the material stirring clamping jaw clamps a pipe fitting to be transferred onto the feeding line, the material stirring hand is arranged on the sliding plate on the linear module, the material stirring hand is used for holding the tail end of the pipe fitting, and the pipe fitting is pushed to move on the feeding line.

The utility model has the beneficial effects that:

(1) According to the utility model, the clamping claw and the cutter are matched with each other by utilizing the automatic shrinkage and expansion, so that the clamping claw and the cutter can be automatically switched according to the diameter of the pipe, the clamping claw automatically stops when shrinking to automatically clamp the corresponding pipe, and the cutter stops moving after cutting through the pipe, so that the aim of processing the pipe in various types can be achieved by only one cutting device;

(2) According to the pipe clamping machine, the pipe traction head is considered, the pipe cannot be completely conveyed into the pipe clamping machine, and the pipe is jacked into the pipe clamping machine by the ejector rod, so that the pipe can be clamped and fixed through the pipe clamping machine;

(3) According to the utility model, when the ejector rod is arranged, the ejector rod is overturned, so that the ejector rod can not be put into use when the pipe meets the head traction, interference can not be generated, and the switching can be performed rapidly, so that the pipe is more automatic and intelligent;

(4) According to the utility model, the clamping claws are arranged into three groups of circumferential arrays, and the clamping claws can be directly and automatically adjusted according to the diameters of the pipes, so that a group of pipe clamping machines can automatically clamp pipes with various diameters, the clamping fixation of cutting and processing of pipes with multiple specifications is completely met, and the rotation angle of a driver can be directly changed to achieve automatic adjustment during switching;

(5) According to the pipe cutting machine, the cutters of the pipe cutting machine are symmetrically arranged, and the cutters can move and adjust towards the center of the cutter disc, so that adjustment and switching can be well performed no matter what diameter specification pipe is cut, and the overall applicability diversity of the device is ensured.

In conclusion, the utility model has the advantages of high automation degree, good stability, wide applicability and the like, and is particularly suitable for the technical field of cutting of general and multi-specification pipes.

Drawings

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

FIG. 2 is a schematic diagram of a three-dimensional structure of a feeding machine according to the present utility model;

FIG. 3 is an enlarged schematic view of the structure shown in FIG. 2A;

FIG. 4 is a schematic diagram of the front view of the clamping assembly of the present utility model;

FIG. 5 is a schematic perspective view of a clamping assembly according to the present utility model;

FIG. 6 is a schematic perspective view of a tube clamping machine according to the present utility model;

FIG. 7 is a schematic perspective view of a pipe cutter according to the present utility model;

FIG. 8 is a schematic view of a part of the structure of the clamping assembly of the present utility model;

FIG. 9 is a schematic view of a part of an enlarged structure of a clamping assembly according to the present utility model;

FIG. 10 is a schematic diagram of a part of an enlarged structure of a clamping assembly according to the present utility model;

FIG. 11 is a schematic view of a partial structure of a pipe cutter according to the present utility model;

FIG. 12 is a schematic cross-sectional view of a pipe cutter of the present utility model;

FIG. 13 is a schematic perspective view of a discharge machine according to the present utility model;

fig. 14 is a schematic view of a partial structure of a discharging machine according to the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Example 1:

as shown in fig. 1 to 4, 6 to 9, 11 and 12, a pipe cutting device for automatically changing a multi-pipe diameter specification includes:

a feeding machine 1, a pipe clamping machine 2, a pipe cutting machine 3 and a discharging machine 4 which are sequentially arranged along a processing path;

the feeding machine 1 is connected with the pipe clamping machine 2, and the feeding machine 1 pushes the pipe 10 towards the pipe clamping machine 2; wherein, the feeding machine 1 comprises a feeding frame 11 and a clamping component 12; the feeding frame 11 is horizontally arranged, a plurality of groups of rollers 111 are uniformly distributed on the feeding frame 11, and the rollers 111 can be driven to rotate by matching a motor with a belt transmission group; the clamping assembly 12 is mounted at one end of the feeding frame 11, which is close to the pipe clamping machine 2, the clamping assembly 12 comprises a linear module 121, a movable seat 122 and clamping jaws 123, the linear module 121 is parallel to the feeding frame 11, the movable seat 122 is arranged on the linear module 121, the movable seat 122 is driven by the linear module 121 to translate, the clamping jaws 123 are mounted on the movable seat 122, and the clamping jaws 123 are tensioned and grab and drag the pipe 10.

When the pipe clamp is in operation, a pipe 10 is positioned on the roller 111, a groove is formed in the roller 111 and used for limiting the circumferential direction of the pipe, and after the clamping jaw 123 clamps the end part of the pipe 10, the pipe clamp is driven to move towards the pipe clamp 2 through the linear module 121 until the pipe 10 is sent into the center surrounded by the clamping jaw 123.

The pipe clamping machine 2 is positioned at the rear side of the feeding machine 1, the pipe clamping machine 2 comprises at least two groups of clamping claws 21 which are arranged in a circumferential array, the clamping claws 21 synchronously draw in and clamp the pipe 10 towards the pipe 10 positioned at the central position, and the pipe clamping machine 2 also comprises a rotary drum 22, a swing arm 23, a guide rod 24 and a driving assembly 25; the rotary drum 22 is rotatably installed, two ends of the rotary drum 22 are respectively provided with a plurality of arc-shaped guide grooves 221 which are arranged in a circumferential array, and the arc-shaped guide grooves 221 are arranged in a one-to-one correspondence with the clamping claws 21;

the swing arms 23 are respectively arranged at two end parts of the rotary drum 22 in a swinging way, the middle parts of the swing arms 23 are connected with the rotary drum 22 through rotating shafts, the swing arms 23 are arranged in a circumferential array way, and the swing arms 23 are connected with two end parts of the clamping claw 21; the guide rod 24 is mounted at the other end of the swing arm 23 relative to the clamping claw 21, and the guide rod 24 is inserted into the corresponding arc-shaped guide groove 221; the driving assembly 25 includes a driver 251 and a transmission unit 252, where the driver 251 drives the drum 22 to rotate through the transmission unit 252, the driver 251 is preferably a servo motor, and the transmission unit 252 is preferably a synchronous belt transmission unit.

During operation, the driver 251 drives the rotary drum 22 to rotate, in the process of rotating the rotary drum 22, the arc-shaped guide 221 is matched with the guide rod 24, so that the swing arm 23 swings, all the clamping claws 21 are driven to move towards the central pipe 10 until the pipe 10 is clamped, the moving distance of the clamping claws 21 is determined by the swinging included angle of the swing arm 23, therefore, the clamping claws 21 can be controlled to clamp pipes with different diameter specifications through the control of the rotating angle of the rotary drum 22, and the whole clamping work for the pipes with different specifications is switched without changing parts, so that the automatic clamping can be directly completed.

The pipe cutter 3 is positioned at the rear side of the pipe clamping machine 2, the pipe cutter 3 comprises two groups of symmetrically arranged cutters 31, and the cutters 31 move towards the pipe 10 positioned at the center and rotate to cut the pipe 10; the pipe cutting machine 3 further comprises a cutter head 32, a cutter seat 33, a reversing block 34, a pusher 35 and a rotary driver 36; two groups of knife holders 33 and reversing blocks 34 corresponding to the knives 31 are symmetrically arranged, the knife disc 32 is in a circular ring shape, the pipe 10 passes through the center of the knife disc 10, and the knives 31 are slidably arranged on the radial direction of the knife disc 32 through the knife holders 33; the reversing block 34 is arranged on the other side of the cutterhead 32 opposite to the cutterhead 33, the reversing block 34 penetrates through the cutterhead 32 and is matched with the cutterhead 33 through an inclined plane 341, a clamping groove 342 is formed in the inclined plane 341, a roller 331 is arranged on the corresponding cutterhead 33, and the roller 331 is matched with the inclined plane 341 to realize that the cutterhead 33 slides towards the center of the cutterhead 32; the pusher 35 is connected with the reversing block 34, the pusher 35 is preferably an air cylinder or a hydraulic cylinder, the installation connection position of the reversing block 34 and the pusher 35 is rotatably arranged relative to the body of the pusher 35, and the pusher 35 drives the reversing block 34 to horizontally push; the rotary driver 36 is installed below the cutterhead 32, the rotary driver 36 is preferably a servo motor, the cutterhead 32, the tool apron 33 and the reversing block 34 are driven to synchronously rotate by a synchronous belt transmission assembly, the corresponding cutter 31 rotates to cut pipes, in addition, the pipe cutting machine 3 further comprises a pipe clamping head 37 arranged at the rear side of the cutterhead 32, the pipe clamping head 37 is used for fixing the end part of the pipe 10 to be cut, and the stability of pipe cutting is guaranteed.

During operation, the reversing block 34 is pushed by the pusher 35, under the cooperation of the roller 331 and the inclined plane 341, the cutter holder 33 slides along the chute on the cutter head 32, so that the cutter 31 continuously moves towards the pipe 10, and in the moving process, the cutter head 32 rotates synchronously to drive the cutter 31 to rotate, and the cutter 31 continuously cuts the pipe, thereby achieving the purpose of cutting the pipe.

Example 2:

the same or corresponding parts of this embodiment as those of the above embodiment are given the same reference numerals as those of the above embodiment, and only the points of distinction from the above embodiment will be described below for the sake of brevity. This embodiment differs from the above embodiment in that:

as shown in fig. 5, further, the feeder 1 further includes a jacking pipe assembly 13, the jacking pipe assembly 13 is mounted on the moving seat 122, and the jacking pipe assembly 13 includes a pusher 131, a gear unit 132, a turnover seat 133 and a jacking rod 134;

the pusher 131 is vertically installed on the moving seat 122, and the pusher 131 is vertically and downwardly pushed;

the gear unit 132 is installed between the pusher 131 and the overturning seat 133, and the pusher 131 drives the overturning seat 133 to overturn through the gear unit 132;

the ejector rod 134 is mounted on the turnover seat 133, the ejector rod 134 turns over along with the turnover seat 133, and the ejector rod 134 pushes the tail end of the pipe 10.

Further, the ejector 134 includes a shaft 1341 and a push plate 1342;

one end of the rod 1341 is mounted on the overturning seat 133, the other end of the rod 1341 is provided with the push plate 1342, and the end of the rod 1341 provided with the push plate 1342 is in a conical shape;

the push plates 1342 are equally spaced around the axial direction of the shaft 1341 in a number of groups, and the push plates 1342 are disposed to cover the radius of the pipe 10.

It should be noted that, since the clamping assembly 12 clamps the pipe near the end of the pipe clamping machine 2, after the pipe is cut to a certain length, the pipe cannot be pulled to the pipe clamping machine 2 by the clamping assembly 12, and the pipe needs to be pushed into the pipe clamping machine 2 by the pipe jacking assembly 13.

During operation, the pusher 131 is matched with the gear unit 132 to drive the turnover seat 133 to turn over, so that the ejector rod 134 swings from vertical to horizontal, and then the linear module 121 drives the ejector rod 134 to move, the ejector rod 134 props against the pipe 10 to move, so that the pipe 10 moves into the pipe clamping machine 2 and is clamped by the pipe clamping machine 2.

Example 3:

the same or corresponding parts of this embodiment as those of the above embodiment are given the same reference numerals as those of the above embodiment, and only the points of distinction from the above embodiment will be described below for the sake of brevity. This embodiment differs from the above embodiment in that:

as shown in fig. 10, further, an arc-shaped limit groove 222 is formed on the drum body of the drum 22, a limit rod 26 fixedly arranged is inserted into the limit groove 222, and the limit rod 26 is fixedly connected with a fixed sleeve sleeved inside the drum 22.

In order to avoid the transition of rotation of the drum 22, the drum 22 is provided with a limit groove 222, and the drum 22 is prevented from transition of rotation by matching with the limit rod 26.

Example 4:

the same or corresponding parts of this embodiment as those of the above embodiment are given the same reference numerals as those of the above embodiment, and only the points of distinction from the above embodiment will be described below for the sake of brevity. This embodiment differs from the above embodiment in that:

as shown in fig. 13 and 14, the discharging machine 4 is connected with the pipe cutting machine 3, the discharging machine 4 automatically outputs the pipe fittings cut by the pipe cutting machine 3, and the discharging machine 4 comprises a feeding line 41 and a stirring component 42;

the feeding line 41 is arranged parallel to the feeding direction of the pipe 10;

the material stirring assembly 42 is arranged on the feeding line 41, the material stirring assembly 42 comprises a linear module 421, a material stirring clamping jaw 422 and a material stirring hand 423, the linear module 421 is parallel to the feeding line 41, the material stirring clamping jaw 422 is arranged on a sliding plate on the linear module 421, the material stirring clamping jaw 422 clamps a pipe fitting and transfers the pipe fitting to the feeding line 41, the material stirring hand 423 is arranged on the sliding plate on the linear module 421, the material stirring hand 423 is used for holding the tail end of the pipe fitting, the pipe fitting is pushed to move on the feeding line 41, and the material stirring hand 423 comprises an air cylinder and a material stirring jaw which are obliquely arranged, and the air cylinder drives the material stirring jaw to stretch out and draw back.

After the pipe is cut to form a pipe, the pipe is clamped by the material-pulling clamping jaw 422, the pipe is transferred to the material-feeding line 41 through the material-pulling clamping jaw 422, and then is pulled and pushed by the material-pulling hand 423, so that the aim of batch output of the pipe is achieved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. Apply to pipe fitting cutting device of automatic section changing of multitube footpath specification, its characterized in that includes:

a feeding machine (1), a pipe clamping machine (2) and a pipe cutting machine (3) which are sequentially arranged along a processing path;

the feeding machine (1) is connected with the pipe clamping machine (2) and used for pushing the pipe (10) towards the pipe clamping machine (2);

the pipe clamping machine (2) is positioned at the rear side of the feeding machine (1), the pipe clamping machine (2) comprises at least two groups of clamping claws (21) which are arranged in a circumferential array, and the clamping claws (21) synchronously draw in and clamp the pipe (10) towards the pipe (10) positioned at the central position;

the pipe cutter (3) is positioned at the rear side of the pipe clamping machine (2), the pipe cutter (3) comprises at least one group of cutters (31), and the cutters (31) move towards the pipe (10) positioned at the center position and rotate to cut the pipe (10).

2. The pipe cutting device for automatic multi-pipe diameter specification change according to claim 1, wherein:

the feeding machine (1) comprises a feeding frame (11) and a clamping assembly (12);

the feeding frame (11) is horizontally arranged, and a plurality of groups of rollers (111) are uniformly distributed on the feeding frame (11);

the clamping assembly (12) is installed in the feeding frame (11) is close to one end of the pipe clamping machine (2), the clamping assembly (12) comprises a linear module (121), a movable seat (122) and clamping jaws (123), the linear module (121) is parallel to the feeding frame (11), the movable seat (122) is arranged on the linear module (121), the movable seat (122) is arranged in a translational mode through driving of the linear module (121), the clamping jaws (123) are installed on the movable seat (122), and the clamping jaws (123) are tensioned to grasp and drag the pipe (10).

3. The pipe cutting device for automatic multi-pipe diameter specification change according to claim 2, wherein:

the feeding machine (1) further comprises a jacking pipe assembly (13), the jacking pipe assembly (13) is arranged on the movable seat (122), and the jacking pipe assembly (13) comprises a pusher (131), a gear unit (132), a turnover seat (133) and a jacking rod (134);

the pusher (131) is vertically arranged on the movable seat (122), and the pusher (131) is vertically and downwards pushed;

the gear unit (132) is arranged between the pusher (131) and the overturning seat (133), and the pusher (131) drives the overturning seat (133) to overturn through the gear unit (132);

the ejector rod (134) is arranged on the overturning seat (133), the ejector rod (134) overturns along with the overturning seat (133), and the ejector rod (134) pushes the tail end of the pipe (10).

4. A pipe cutting device for automatic multi-pipe diameter gauge change according to claim 3, wherein:

the ejector rod (134) comprises a rod body (1341) and a push plate (1342);

one end of the rod body (1341) is arranged on the overturning seat (133), the other end of the rod body (1341) is provided with the push plate (1342), and the end part of the rod body (1341) provided with the push plate (1342) is arranged in a conical shape;

the push plates (1342) are equidistantly arranged in groups around the axial direction of the rod body (1341), and the push plates (1342) cover the radial arrangement of the pipe (10).

5. The pipe cutting device for automatic multi-pipe diameter specification change according to claim 1, wherein:

the pipe clamping machine (2) further comprises a rotary drum (22), a swing arm (23), a guide rod (24) and a driving assembly (25);

the rotary drum (22) is rotatably arranged, two ends of the rotary drum (22) are respectively provided with a plurality of arc-shaped guide grooves (221) which are arranged in a circumferential array, and the arc-shaped guide grooves (221) are arranged in one-to-one correspondence with the clamping claws (21);

the swing arms (23) are arranged at two ends of the rotary drum (22) in a swinging mode respectively, the middle of each swing arm (23) is connected with the rotary drum (22) through a rotating shaft, the swing arms (23) are arranged in a circumferential array mode, and the swing arms (23) are connected with two ends of the clamping claw (21);

the guide rod (24) is arranged at the other end part of the swing arm (23) relative to the clamping claw (21), and the guide rod (24) is inserted into the corresponding arc-shaped guide groove (221);

the driving assembly (25) comprises a driver (251) and a transmission unit (252), and the driver (251) drives the rotary drum (22) to rotate through the transmission unit (252).

6. The pipe cutting device for automatic multi-pipe diameter specification changing according to claim 5, wherein:

an arc-shaped limit groove (222) is formed in the drum body of the rotary drum (22), and a limit rod (26) which is fixedly arranged is inserted into the limit groove (222).

7. The pipe cutting device for automatic multi-pipe diameter specification change according to claim 1, wherein:

the pipe cutting machine (3) further comprises a cutter head (32), a cutter seat (33), a reversing block (34), a pusher (35) and a rotary driver (36);

the cutter head (32) is arranged in a circular ring shape, and the cutter (31) is arranged on the radial direction of the cutter head (32) in a sliding manner through the cutter seat (33);

the reversing block (34) is arranged on the other side of the cutterhead (32) opposite to the cutterhead (33), penetrates through the cutterhead (32) and is matched with the cutterhead (33) through an inclined plane (341), and drives the cutterhead (33) to slide towards the center of the cutterhead (32);

the pusher (35) is connected with the reversing block (34), the reversing block (34) is rotatably arranged relative to the pusher (35), and the pusher (35) drives the reversing block (34) to horizontally push;

the rotary driver (36) is arranged below the cutterhead (32), and the rotary driver (36) drives the cutterhead (32), the cutter holder (33) and the reversing block (34) to synchronously rotate through the transmission component.

8. The pipe cutting device for automatic multi-pipe diameter specification changing according to claim 7, wherein:

the cutter (31) is symmetrically provided with two groups, and the cutter seat (33) and the reversing block (34) corresponding to the cutter (31) are symmetrically provided with two groups.

9. The pipe cutting device for automatic multi-pipe diameter specification changing according to claim 7, wherein:

the pipe cutting machine (3) further comprises a pipe fitting chuck (37) arranged at the rear side of the cutter head (32), and the pipe fitting chuck (37) is used for fixing the end part of the pipe (10) to be cut.

10. The pipe cutting device for automatic multi-pipe diameter specification change according to claim 1, wherein:

the pipe cutting machine also comprises a discharging machine (4), wherein the discharging machine (4) is connected with the pipe cutting machine (3), the discharging machine (4) automatically outputs the pipe fittings cut by the pipe cutting machine (3), and the discharging machine (4) comprises a feeding line (41) and a material shifting component (42);

the feeding line (41) is arranged parallel to the feeding direction of the pipe (10);

the material stirring assembly (42) is arranged on the feeding line (41), the material stirring assembly (42) comprises a linear module (421), a material stirring clamping jaw (422) and a material stirring hand (423), the linear module (421) is parallel to the feeding line (41), the material stirring clamping jaw (422) is arranged on a sliding plate on the linear module (421), the material stirring clamping jaw (422) clamps a pipe fitting and transfers the pipe fitting to the feeding line (41), the material stirring hand (423) is arranged on the sliding plate arranged on the linear module (421), the tail end of the pipe fitting is wrapped by the material stirring hand (423), and the pipe fitting is pushed to move on the feeding line (41).