CN110802268B

CN110802268B - Pipe positioning and cutting device

Info

Publication number: CN110802268B
Application number: CN201911101287.6A
Authority: CN
Inventors: 李彪
Original assignee: Zhejiang Obo Pipe Industry Co ltd
Current assignee: Zhejiang Obo Pipe Industry Co.,Ltd.
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-11-06
Anticipated expiration: 2039-11-12
Also published as: CN110802268A

Abstract

The invention relates to a cutting device, in particular to a pipe positioning and cutting device which comprises a device support, a power mechanism, a rotating lead screw, a clamping mechanism, a positioning rail, a pushing frame and a cutting mechanism.

Description

Pipe positioning and cutting device

Technical Field

The invention relates to a cutting device, in particular to a pipe positioning and cutting device.

Background

For example, a pipe positioning and cutting device for a slope-shaped recovery tank is disclosed as CN205702660U, wherein a conveying mechanism and a slope-shaped tank are arranged on a rack main body, a dust suction device is arranged between the conveying mechanism and the slope-shaped tank, supporting columns are arranged on two sides of the rack main body, telescopic mechanisms are arranged on the supporting columns, a cutting device is arranged on the telescopic mechanisms, a limiting device is arranged on the rack main body, a size positioner and an infrared inductor are arranged at the upper end of the limiting device, the size positioner is connected with the infrared inductor through a circuit, a motor is arranged at the lower end of the rack main body, and the motor is connected with the conveying mechanism, the dust suction device, the telescopic mechanisms, the cutting; the utility model has the defect that the quantitative cutting can not be carried out on the pipe.

Disclosure of Invention

The invention aims to provide a pipe positioning and cutting device which can quantitatively cut pipes and change the cutting length of the pipes according to different use requirements.

The purpose of the invention is realized by the following technical scheme:

a pipe positioning and cutting device comprises a device bracket, a power mechanism, a rotating screw rod, a clamping mechanism, a positioning track, a pushing frame and a cutting mechanism, the power mechanism is connected to the device support, the rotating screw rod is rotatably connected to the device support, the rotating screw rod is in transmission connection with the power mechanism, the clamping mechanism is slidably connected to the device support, the clamping mechanism is in threaded connection with the rotating screw rod, the positioning rail is fixedly connected to the device support, the front end of the device support is fixedly connected with the cutting mechanism, the cutting mechanism is in transmission connection with the power mechanism, the rotating screw rod drives the clamping mechanism to slide on the device support, the clamping mechanism moves to an appointed position to extrude the positioning rail to move downwards, the positioning rail moves downwards to cut off transmission between the power mechanism and the rotating screw rod, and the positioning rail moves downwards to communicate transmission between the power mechanism and the cutting mechanism.

As a further optimization of the technical scheme, the pipe positioning and cutting device comprises a support ring, two support base plates, vertical waist holes, two spring baffles I, two limiting rails, two support side plates and a connecting plate, wherein the lower ends of the two support rings are fixedly connected with the support base plates, the two support base plates are respectively provided with the vertical waist holes, the two support base plates are respectively fixedly connected with the spring baffles I, the two spring baffles I are respectively positioned at the lower sides of the two vertical waist holes, the limiting rails are fixedly connected between the two sides of the two support rings, the upper ends of the two support rings are respectively fixedly connected with the support side plates, and the connecting plate is fixedly connected between the two support side plates.

As a further optimization of the technical scheme, the pipe positioning and cutting device comprises a power mechanism, wherein the power mechanism comprises a motor, friction wheels, transmission shafts, connecting keys, sliding friction wheels and shifting forks, the motor is fixedly connected to the connecting plate, the friction wheels are fixedly connected to two ends of an output shaft of the motor, the transmission shafts are rotatably connected to two supporting side plates, the connecting keys are fixedly connected to the inner sides of the two transmission shafts, the sliding friction wheels are slidably connected to the two connecting keys respectively, the two sliding friction wheels are in friction transmission with the two friction wheels respectively, the shifting forks are rotatably connected to the two sliding friction wheels respectively, two ends of a rotating lead screw are rotatably connected to the two supporting side plates respectively, and the rotating lead screw is in transmission connection with the transmission shaft positioned on the rear side.

As further optimization of the technical scheme, the pipe positioning and cutting device comprises a clamping mechanism, wherein the clamping mechanism comprises a clamping inner cylinder, a clamping outer cylinder, a vortex-shaped thread plate I, arc plates I, sliding blocks I, a pushing wheel and clamping screws, the clamping inner cylinder is fixedly connected with the clamping outer cylinder, the clamping inner cylinder is rotatably connected with the vortex-shaped thread plate I, the clamping outer cylinder is fixedly connected with four arc plates I, the sliding blocks I are slidably connected between the four arc plates I, the four sliding blocks I are connected with the vortex-shaped thread plate I through threads, the lower end of the clamping outer cylinder is fixedly connected with the pushing wheel, the clamping outer cylinder is rotatably connected with the clamping screws, the clamping screws and the vortex-shaped thread plate I are in meshing transmission, two ends of the clamping outer cylinder are respectively slidably connected onto two limiting rails, and the clamping outer cylinder is connected onto a rotating.

As a further optimization of the technical scheme, the pipe positioning and cutting device comprises a positioning rail, rail long holes, spring baffles II, sliding columns, positioning sliding blocks and positioning screws, wherein two ends of the positioning bottom plate are respectively connected in the two vertical waist holes in a sliding mode, the spring baffles II are fixedly connected to two ends of the positioning bottom plate, the sliding columns are fixedly connected to the lower ends of the two spring baffles II, the two sliding columns are respectively connected to the two spring baffles I in a sliding mode, compression springs are arranged between the spring baffles I and the spring baffles II, the rail long holes are formed in the positioning bottom plate, the positioning sliding blocks are connected in the rail long holes in a sliding mode, and the positioning sliding blocks are connected with the positioning screws through threads.

As a further optimization of the technical scheme, the pipe positioning and cutting device comprises a pushing frame, wherein the pushing frame comprises a pushing cross plate and pushing connecting rods, the pushing cross plate is fixedly connected to the upper end of a positioning bottom plate, the pushing connecting rods are hinged to the front side and the rear side of the pushing cross plate, the lower ends of the two pushing connecting rods are respectively hinged to two shifting forks, and the lower ends of the two pushing connecting rods are inclined towards the rear side.

As a further optimization of the technical scheme, the invention relates to a pipe positioning and cutting device, wherein the cutting mechanism comprises a cutting inner cylinder, a cutting outer cylinder and a volute thread plate II, arc board II, sliding block II, cutting tool and cutting band pulley, fixedly connected with cutting urceolus on the cutting inner tube, cutting urceolus fixed connection is on the support ring that is located the front side, it is connected with vortex thread board II to rotate on the cutting inner tube, two arc boards II of inboard fixedly connected with of cutting urceolus, sliding connection has sliding block II between two arc boards II, sliding block II passes through threaded connection on vortex thread board II, fixedly connected with cutting motor on sliding block II, fixedly connected with cutting tool on the output shaft of cutting motor, it is connected with the cutting band pulley to rotate on the cutting urceolus, the cutting band pulley is connected with the transmission shaft transmission that is located the front side, cutting band pulley and the II meshing transmissions of vortex thread board.

As a further optimization of the technical scheme, in the pipe positioning and cutting device, the support ring, the clamping inner cylinder and the cutting inner cylinder are coaxially arranged.

The pipe positioning and cutting device has the beneficial effects that:

according to the pipe positioning and cutting device, pipes with different diameters can be clamped through the clamping mechanism, the power mechanism drives the rotating screw rod to rotate, the rotating screw rod drives the clamping mechanism to slide on the device support through threads, when the clamping mechanism slides to a specified distance, the clamping mechanism pushes the positioning rail to move downwards through the positioning sliding block, the downward movement of the positioning rail cuts off the transmission between the power mechanism and the rotating screw rod, the downward movement of the positioning rail is communicated with the transmission between the power mechanism and the cutting mechanism, the cutting mechanism cuts the pipes, the position of the positioning sliding block is continuously adjusted, and multiple times of cutting are completed.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and "upright", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, directly or indirectly connected through an intermediate medium, and may be a communication between two members. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present invention, the meaning of "a plurality", and "a plurality" is two or more unless otherwise specified.

FIG. 1 is a schematic view of the overall structure of the pipe positioning and cutting device of the present invention;

FIG. 2 is a schematic view of the device support structure of the present invention;

FIG. 3 is a schematic diagram of a power mechanism according to the present invention;

FIG. 4 is a schematic cross-sectional view of a power mechanism according to the present invention;

FIG. 5 is a schematic structural view of a clamping mechanism of the present invention;

FIG. 6 is a schematic structural view of a cross-sectional view of a clamping mechanism of the invention;

FIG. 7 is a first schematic view of the positioning track structure of the present invention;

FIG. 8 is a schematic view of the positioning track structure of the present invention II;

FIG. 9 is a schematic view of the construction of the pushing frame of the present invention;

FIG. 10 is a schematic view of the cutting mechanism of the present invention;

fig. 11 is a schematic cross-sectional view of the cutting mechanism of the present invention.

In the figure: a device holder 1; a support ring 1-1; a support base plate 1-2; 1-3 of vertical waist holes; 1-4 parts of a spring baffle plate; 1-5 of a limiting track; supporting the side plates 1-6; connecting plates 1-7; a power mechanism 2; a motor 2-1; 2-2 parts of a friction wheel; 2-3 of a transmission shaft; 2-4 of a connecting bond; 2-5 of a sliding friction wheel; 2-6 of a shifting fork; rotating the screw rod 3; a clamping mechanism 4; clamping the inner cylinder 4-1; clamping the outer barrel 4-2; 4-3 of a volute thread plate; 4-4 parts of an arc plate; 4-5 sliding blocks; 4-6 of a push wheel; 4-7 parts of clamping screw; a positioning track 5; positioning the bottom plate 5-1; a rail long hole 5-2; 5-3 of a spring baffle plate; 5-4 of a sliding column; 5-5 of a positioning sliding block; 5-6 of a positioning screw; a pushing frame 6; pushing the cross plate 6-1; pushing the connecting rod 6-2; a cutting mechanism 7; cutting the inner barrel 7-1; cutting the outer cylinder 7-2; a volute thread plate II 7-3; 7-4 of arc plates; 7-5 of a sliding block II; 7-6 of a cutting tool; cutting pulleys 7-7.

Detailed Description

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

The first embodiment is as follows:

the embodiment is described below with reference to fig. 1-11, a pipe positioning and cutting device, which includes a device support 1, a power mechanism 2, a rotating screw rod 3, a clamping mechanism 4, a positioning rail 5, a pushing frame 6 and a cutting mechanism 7, wherein the power mechanism 2 is connected to the device support 1, the rotating screw rod 3 is rotatably connected to the device support 1, the rotating screw rod 3 is in transmission connection with the power mechanism 2, the clamping mechanism 4 is slidably connected to the device support 1, the clamping mechanism 4 is connected to the rotating screw rod 3 through a screw thread, the positioning rail 5 is fixedly connected to the device support 1, the cutting mechanism 7 is fixedly connected to the front end of the device support 1, the cutting mechanism 7 is in transmission connection with the power mechanism 2, the rotating screw rod 3 drives the clamping mechanism 4 to slide on the device support 1, the clamping mechanism 4 moves to a designated position to extrude the, the positioning track 5 moves downwards to cut off the transmission between the power mechanism 2 and the rotating screw rod 3, and the positioning track 5 moves downwards to communicate the transmission between the power mechanism 2 and the cutting mechanism 7; the pipe with different diameters can be clamped through the clamping mechanism 4, the power mechanism 2 drives the rotating screw rod 3 to rotate, the rotating screw rod 3 drives the clamping mechanism 4 to slide on the device support 1 through threads, when the clamping mechanism 4 slides to a specified distance, the clamping mechanism 4 pushes the positioning rail 5 to move downwards through the positioning sliding blocks 5-5, the positioning rail 5 moves downwards to cut off transmission between the power mechanism 2 and the rotating screw rod 3, the positioning rail 5 moves downwards to communicate transmission between the power mechanism 2 and the cutting mechanism 7, the cutting mechanism 7 cuts the pipe, the position of the positioning sliding blocks 5-5 is continuously adjusted, and multiple times of cutting are completed.

The second embodiment is as follows:

the embodiment is described below with reference to fig. 1-11, and the embodiment will be further described, wherein the device bracket 1 includes two support rings 1-1, two support base plates 1-2, two vertical waist holes 1-3, two spring baffles i 1-4, two limit rails 1-5, two support side plates 1-6 and two connecting plates 1-7, the support rings 1-1 are fixedly connected to the lower ends of the two support rings 1-1, the two support base plates 1-2 are respectively provided with a vertical waist hole 1-3, the two support base plates 1-2 are respectively fixedly connected to the spring baffles i 1-4, the two spring baffles i 1-4 are respectively positioned at the lower sides of the two vertical waist holes 1-3, and the limit rails 1-5 are fixedly connected between the two sides of the two support rings 1-1, the upper ends of the two support rings 1-1 are fixedly connected with support side plates 1-6, and a connecting plate 1-7 is fixedly connected between the two support side plates 1-6.

The third concrete implementation mode:

the second embodiment is further described with reference to fig. 1-11, wherein the power mechanism 2 includes a motor 2-1, friction wheels 2-2, transmission shafts 2-3, connecting keys 2-4, sliding friction wheels 2-5 and a shifting fork 2-6, the motor 2-1 is fixedly connected to the connecting plates 1-7, the friction wheels 2-2 are fixedly connected to both ends of an output shaft of the motor 2-1, the transmission shafts 2-3 are rotatably connected to both supporting side plates 1-6, the connecting keys 2-4 are fixedly connected to the inner sides of the two transmission shafts 2-3, the sliding friction wheels 2-5 are slidably connected to both connecting keys 2-4, the two sliding friction wheels 2-5 are in friction transmission with the two friction wheels 2-2 respectively, the two sliding friction wheels 2-5 are rotatably connected with shifting forks 2-6, two ends of a rotating screw rod 3 are respectively rotatably connected with the two supporting side plates 1-6, and the rotating screw rod 3 is in transmission connection with a transmission shaft 2-3 positioned at the rear side.

The fourth concrete implementation mode:

the third embodiment is further described with reference to fig. 1-11, wherein the clamping mechanism 4 includes a clamping inner cylinder 4-1, a clamping outer cylinder 4-2, a spiral thread plate i 4-3, an arc plate i 4-4, a sliding block i 4-5, a pushing wheel 4-6 and a clamping screw 4-7, the clamping inner cylinder 4-1 is fixedly connected with the clamping outer cylinder 4-2, the clamping inner cylinder 4-1 is rotatably connected with the spiral thread plate i 4-3, the clamping outer cylinder 4-2 is fixedly connected with four arc plates i 4-4, the sliding blocks i 4-5 are slidably connected between the four arc plates i 4-4, the four sliding blocks i 4-5 are respectively connected with the spiral thread plate i 4-3 by screw threads, the lower end of the clamping outer cylinder 4-2 is fixedly connected with the pushing wheel 4-6, the clamping outer barrel 4-2 is rotatably connected with a clamping screw 4-7, the clamping screw 4-7 is in meshing transmission with the volute thread plate I4-3, two ends of the clamping outer barrel 4-2 are respectively connected onto two limiting rails 1-5 in a sliding mode, and the clamping outer barrel 4-2 is connected onto the rotating screw rod 3 through threads.

The fifth concrete implementation mode:

the fourth embodiment is further described with reference to fig. 1-11, wherein the positioning rail 5 includes a positioning bottom plate 5-1, a rail slot 5-2, a spring baffle plate ii 5-3, a sliding column 5-4, a positioning sliding block 5-5 and a positioning screw 5-6, two ends of the positioning bottom plate 5-1 are respectively slidably connected in the two vertical waist holes 1-3, two ends of the positioning bottom plate 5-1 are both fixedly connected with the spring baffle plate ii 5-3, lower ends of the two spring baffle plates ii 5-3 are both fixedly connected with the sliding column 5-4, the two sliding columns 5-4 are respectively slidably connected on the two spring baffle plates i 1-4, a compression spring is arranged between the spring baffle plate i 1-4 and the spring baffle plate ii 5-3, the positioning bottom plate 5-1 is provided with a long rail hole 5-2, a positioning sliding block 5-5 is connected in the long rail hole 5-2 in a sliding mode, and the positioning sliding block 5-5 is connected with a positioning screw 5-6 through threads.

The sixth specific implementation mode:

the embodiment is described below with reference to fig. 1 to 11, and the fifth embodiment is further described in the present embodiment, where the pushing frame 6 includes a pushing cross plate 6-1 and a pushing connecting rod 6-2, the pushing cross plate 6-1 is fixedly connected to the upper end of the positioning bottom plate 5-1, the pushing connecting rods 6-2 are hinged to the front and rear sides of the pushing cross plate 6-1, the lower ends of the two pushing connecting rods 6-2 are respectively hinged to the two shifting forks 2-6, and the lower ends of the two pushing connecting rods 6-2 are both inclined to the rear side.

The seventh embodiment:

the sixth embodiment is further described with reference to fig. 1-11, wherein the cutting mechanism 7 includes a cutting inner cylinder 7-1, a cutting outer cylinder 7-2, a spiral thread plate ii 7-3, an arc plate ii 7-4, a sliding block ii 7-5, a cutting tool 7-6 and a cutting pulley 7-7, the cutting inner cylinder 7-1 is fixedly connected with the cutting outer cylinder 7-2, the cutting outer cylinder 7-2 is fixedly connected with a support ring 1-1 at the front side, the cutting inner cylinder 7-1 is rotatably connected with the spiral thread plate ii 7-3, the inner side of the cutting outer cylinder 7-2 is fixedly connected with two arc plates ii 7-4, the sliding block ii 7-5 is slidably connected between the two arc plates ii 7-4, the sliding block ii 7-5 is connected with the spiral thread plate ii 7-3 through a screw thread, a cutting motor is fixedly connected to the sliding block II 7-5, a cutting tool 7-6 is fixedly connected to an output shaft of the cutting motor, a cutting belt wheel 7-7 is rotatably connected to the cutting outer cylinder 7-2, the cutting belt wheel 7-7 is in transmission connection with a transmission shaft 2-3 located on the front side, and the cutting belt wheel 7-7 is in meshing transmission with the spiral thread plate II 7-3.

The specific implementation mode is eight:

the present embodiment is described below with reference to fig. 1 to 11, and the seventh embodiment is further described in the present embodiment, in which the support ring 1-1, the clamping inner cylinder 4-1 and the cutting inner cylinder 7-1 are coaxially disposed.

The invention relates to a pipe positioning and cutting device, which has the working principle that:

when the cutting tool is used, a pipe to be cut is placed between the four sliding blocks I4-5, so that the front end of the pipe and the cutting tool 7-6 are located at the same vertical position, the clamping screw 4-7 is rotated, the clamping screw 4-7 rotates by taking the axis of the clamping screw 4-7 as the center, the clamping screw 4-7 drives the vortex thread plate I4-3 to rotate by taking the axis of the clamping screw 4-3 as the center, vortex threads are arranged on the vortex thread plate I4-3, the vortex thread plate I4-3 drives the four sliding blocks I4-5 to be close to or far away from each other through the vortex threads arranged on the vortex thread plate I4-3, the four sliding blocks I4-5 slide between the four arc plates I4-4, and the four sliding blocks I4-5 clamp; adjusting the position of a positioning sliding block 5-5 on a long hole 5-2 of a track, wherein the distance between the lower ends of the positioning sliding block 5-5 and a pushing wheel 4-6 is the length of a pipe to be cut, rotating a positioning screw 5-6 to enable the positioning screw 5-6 to lock the positioning sliding block 5-5 and release the positioning sliding block 5-5 through threads, and adjusting the position of the positioning sliding block 5-5; starting a motor 2-1 and a cutting motor, starting rotation of an output shaft of the motor 2-1, enabling the output shaft of the motor 2-1 to drive friction wheels 2-2 at the front side and the rear side to rotate, enabling an extension spring to push a spring baffle II 5-3 to have upward movement tendency, enabling the spring baffle II 5-3 to push a positioning bottom plate 5-1 to have upward movement tendency, enabling the positioning bottom plate 5-1 to push a pushing frame 6 to have upward movement tendency, enabling the pushing frame 6 to push the upper ends of two pushing connecting rods 6-2 to have upward movement tendency, enabling the lower end of the pushing connecting rod 6-2 at the rear side to pull corresponding sliding friction wheel 2-5 to be in contact with the friction wheel 2-2 to enter friction transmission, enabling the lower end of the pushing connecting rod 6-2 at the front side to pull the corresponding sliding friction wheel 2-5 to be separated from the friction wheel 2-2, withdrawing from the friction transmission; a sliding friction wheel 2-5 positioned at the rear side rotates to drive a rotating screw rod 3 to rotate, and the rotating screw rod 3 drives a clamping outer cylinder 4-2 to slide between two limiting rails 1-5 through threads; the clamping outer cylinder 4-2 drives the clamping mechanism 4 to move, the clamping mechanism 4 drives the pipe to move, when the clamping mechanism 4 moves to a specified length, the push wheels 4-6 are in contact with the positioning sliding blocks 5-5 and push the positioning sliding blocks 5-5 to move downwards, the positioning sliding blocks 5-5 move downwards to drive the positioning rails 5 to move downwards, the positioning rails 5 drive the push frame 6 to move downwards, the upper ends of the two push connecting rods 6-2 move downwards, the sliding friction wheels 2-5 and the friction wheels 2-2 on the rear side quit friction transmission, the sliding friction wheels 2-5 and the friction wheels 2-2 on the front side enter friction transmission, the sliding friction wheels 2-5 on the front side drive the cutting belt wheels 7-7 to rotate, and the cutting belt wheels 7-7 drive the volute thread plates II 7-3 to rotate, the vortex thread plate II 7-3 is provided with vortex threads, and the vortex thread plate II 7-3 drives the cutting tool 7-6 to move downwards through the vortex threads to cut the pipe; when the next cutting is needed, the cutting edge of the previous cutting is positioned below the cutting tool 7-6 and is used as a cutting reference; reversing the motor 2-1 to lift the cutting tool 7-6 and turning off the motor 2-1; adjusting the relative distance between the positioning sliding block 5-5 and the pushing wheel 4-6 again, starting the motor 2-1 again, and repeatedly moving; and continuously adjusting the positions of the positioning sliding blocks 5-5 to finish multiple times of cutting.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.

Claims

1. The utility model provides a tubular product location cutting device, includes device support (1), power unit (2), rotates lead screw (3), clamping machine structure (4), location track (5), promotes frame (6) and cutting mechanism (7), its characterized in that: the device is characterized in that the power mechanism (2) is connected to the device support (1), the rotating screw rod (3) is rotatably connected to the device support (1), the rotating screw rod (3) is in transmission connection with the power mechanism (2), the clamping mechanism (4) is in sliding connection with the device support (1), the clamping mechanism (4) is in threaded connection with the rotating screw rod (3), the positioning track (5) is fixedly connected to the device support (1), the front end of the device support (1) is fixedly connected with the cutting mechanism (7), the cutting mechanism (7) is in transmission connection with the power mechanism (2), the rotating screw rod (3) drives the clamping mechanism (4) to slide on the device support (1), the clamping mechanism (4) moves to a specified position to extrude the positioning track (5) to move downwards, the positioning track (5) moves downwards to cut off transmission between the power mechanism (2) and the rotating screw rod (3), the positioning track (5) moves downwards to communicate the transmission between the power mechanism (2) and the cutting mechanism (7);

the device support (1) comprises support rings (1-1), support base plates (1-2), vertical waist holes (1-3), spring baffles I (1-4), limiting rails (1-5), support side plates (1-6) and connecting plates (1-7), the number of the support rings (1-1) is two, the lower ends of the two support rings (1-1) are fixedly connected with the support base plates (1-2), the two support base plates (1-2) are respectively provided with the vertical waist holes (1-3), the two support base plates (1-2) are respectively fixedly connected with the spring baffles I (1-4), the two spring baffles I (1-4) are respectively positioned at the lower sides of the two vertical waist holes (1-3), the limiting rails (1-5) are fixedly connected between the two sides of the two support rings (1-1), the upper ends of the two support rings (1-1) are fixedly connected with support side plates (1-6), and a connecting plate (1-7) is fixedly connected between the two support side plates (1-6);

the power mechanism (2) comprises a motor (2-1), friction wheels (2-2), transmission shafts (2-3), connecting keys (2-4), sliding friction wheels (2-5) and shifting forks (2-6), the motor (2-1) is fixedly connected to a connecting plate (1-7), the friction wheels (2-2) are fixedly connected to two ends of an output shaft of the motor (2-1), the transmission shafts (2-3) are rotatably connected to two supporting side plates (1-6), the connecting keys (2-4) are fixedly connected to the inner sides of the two transmission shafts (2-3), the sliding friction wheels (2-5) are slidably connected to the two connecting keys (2-4), and the two sliding friction wheels (2-5) are in friction transmission with the two friction wheels (2-2) respectively, all rotate on two slip friction pulley (2-5) and be connected with shift fork (2-6), rotate the both ends of lead screw (3) and rotate respectively and connect on two support curb plate (1-6), rotate lead screw (3) and be located the transmission of rear side transmission shaft (2-3) and connect:

the clamping mechanism (4) comprises a clamping inner cylinder (4-1), a clamping outer cylinder (4-2), a volute thread plate I (4-3), arc plates I (4-4), sliding blocks I (4-5), pushing wheels (4-6) and clamping screws (4-7), the clamping outer cylinder (4-2) is fixedly connected to the clamping inner cylinder (4-1), the volute thread plate I (4-3) is rotatably connected to the clamping inner cylinder (4-1), four arc plates I (4-4) are fixedly connected to the clamping outer cylinder (4-2), the sliding blocks I (4-5) are slidably connected between the four arc plates I (4-4), the four arc plates I (4-5) are connected with the volute thread plate I (4-3) through threads, the pushing wheels (4-6) are fixedly connected to the lower end of the clamping outer cylinder (4-2), the clamping outer cylinder (4-2) is rotatably connected with a clamping screw (4-7), the clamping screw (4-7) is in meshing transmission with the volute thread plate I (4-3), two ends of the clamping outer cylinder (4-2) are respectively connected onto two limiting rails (1-5) in a sliding mode, and the clamping outer cylinder (4-2) is connected onto the rotating screw rod (3) through threads;

the positioning track (5) comprises a positioning bottom plate (5-1), a track long hole (5-2), spring baffles II (5-3), sliding columns (5-4), a positioning sliding block (5-5) and positioning screws (5-6), wherein two ends of the positioning bottom plate (5-1) are respectively connected in the two vertical waist holes (1-3) in a sliding manner, two ends of the positioning bottom plate (5-1) are respectively and fixedly connected with the spring baffles II (5-3), the lower ends of the two spring baffles II (5-3) are respectively and fixedly connected with the sliding columns (5-4), the two sliding columns (5-4) are respectively and slidably connected on the two spring baffles I (1-4), and compression springs are arranged between the spring baffles I (1-4) and the spring baffles II (5-3), a track long hole (5-2) is formed in the positioning bottom plate (5-1), a positioning sliding block (5-5) is connected in the track long hole (5-2) in a sliding mode, and a positioning screw (5-6) is connected to the positioning sliding block (5-5) through threads;

the pushing frame (6) comprises a pushing cross plate (6-1) and pushing connecting rods (6-2), the pushing cross plate (6-1) is fixedly connected to the upper end of the positioning bottom plate (5-1), the pushing connecting rods (6-2) are hinged to the front side and the rear side of the pushing cross plate (6-1), the lower ends of the two pushing connecting rods (6-2) are hinged to the two shifting forks (2-6) respectively, and the lower ends of the two pushing connecting rods (6-2) are inclined towards the rear side.

2. The pipe positioning and cutting device of claim 1, wherein: the cutting mechanism (7) comprises a cutting inner cylinder (7-1), a cutting outer cylinder (7-2), a vortex thread plate II (7-3), an arc plate II (7-4), a sliding block II (7-5), a cutting tool (7-6) and a cutting belt wheel (7-7), the cutting outer cylinder (7-2) is fixedly connected to the cutting inner cylinder (7-1), the cutting outer cylinder (7-2) is fixedly connected to a supporting ring (1-1) positioned on the front side, the vortex thread plate II (7-3) is rotatably connected to the cutting inner cylinder (7-1), two arc plates II (7-4) are fixedly connected to the inner side of the cutting outer cylinder (7-2), the sliding block II (7-5) is slidably connected between the two arc plates II (7-4), and the sliding block II (7-5) is connected to the vortex thread plate II (7-3) through threads, a cutting motor is fixedly connected to the sliding block II (7-5), a cutting tool (7-6) is fixedly connected to an output shaft of the cutting motor, a cutting belt wheel (7-7) is rotatably connected to the cutting outer cylinder (7-2), the cutting belt wheel (7-7) is in transmission connection with a transmission shaft (2-3) located on the front side, and the cutting belt wheel (7-7) is in meshing transmission with the volute thread plate II (7-3).

3. The pipe positioning and cutting device of claim 2, wherein: the support ring (1-1), the clamping inner cylinder (4-1) and the cutting inner cylinder (7-1) are all coaxially arranged.