CN114952990A

CN114952990A - Automatic fixed-length cutting equipment for industrial hard pipelines

Info

Publication number: CN114952990A
Application number: CN202210627590.5A
Authority: CN
Inventors: 马旭宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-08-30

Abstract

The invention discloses fixed-length automatic cutting equipment for industrial hard pipelines, which comprises an equipment body, wherein a control groove is formed in the upper surface of the equipment body, two electromagnetic slide rails are symmetrically arranged on the side wall of the groove opening of the control groove, a cutting mechanism is jointly arranged on the two electromagnetic slide rails, a clamping follow-up mechanism is arranged on the cutting mechanism, and a rotary feeding mechanism is arranged on the side wall of the equipment body. According to the invention, the pipeline and the cutting mechanism synchronously move through the clamping follow-up mechanism, so that relatively static cutting is realized, the pipeline cut is smoother, the rotation direction of the pipeline is opposite to the rotation direction of the saw blade machine through the rotary feeding mechanism and the cutting mechanism, so that relative rotation cutting is realized, the pipeline cutting efficiency is higher, the operation is simple, and the application range is wide.

Description

Automatic fixed-length cutting equipment for industrial hard pipelines

Technical Field

The invention relates to the technical field of pipeline cutting, in particular to fixed-length automatic cutting equipment for an industrial hard pipeline.

Background

Current pipeline fixed length cutting means adopts the shearing force extrusion to cut or the saw bit friction cuts usually, and the shearing force extrusion cuts and makes the cut surface pressurized easily lead to the mouth of pipe pressurized to damage, and the shearing force extrusion cuts and cuts with the saw bit friction cuts when cutting, all needs the pipeline to stop moving, otherwise can lead to the incision uneven and saw bit or cutter side direction pressurized too big fracture, makes the efficiency that cuts reduce, can not continuous feeding work.

Disclosure of Invention

The invention aims to solve the problems that in the prior art, a pipe orifice is easily damaged by pressure cutting, and the cutting efficiency is greatly reduced due to the fact that a pipeline needs to be static for both pressure cutting and friction cutting, and provides fixed-length automatic cutting equipment for an industrial hard pipeline.

In order to achieve the purpose, the invention adopts the following technical scheme:

an automatic fixed-length cutting device for industrial hard pipelines comprises a machine body, wherein a control groove is formed in the upper surface of the machine body, two electromagnetic slide rails are symmetrically installed on the side wall of a groove opening of the control groove, a cutting mechanism is commonly installed on the two electromagnetic slide rails, a clamping follow-up mechanism is installed on the cutting mechanism, a rotary feeding mechanism is installed on the side wall of the machine body, the cutting mechanism comprises a base which is installed on the two electromagnetic slide rails in a sliding mode, a plurality of hydraulic push rods are symmetrically installed on the base in a sealing and sliding insertion mode, a fixed plate is installed at the upper ends of the hydraulic push rods, two arc-shaped cylinders are symmetrically and fixedly installed on the fixed plate, two limiting rings are symmetrically installed inside each arc-shaped cylinder, an arc-shaped piston column is installed between the two limiting rings in a sealing and sliding mode, a double-arc-shaped rod is fixedly installed on each arc-shaped piston column, every the sealed slip of outer arc pole of shape pole is returned to double arcs inserts the both ends of establishing at a ARC section of thick bamboo, two the interior arc pole of shape pole is returned to double arcs all is located the outside of two ARC sections of thick bamboo and installs the backup pad jointly, fixed mounting has the saw mascerating machine in the backup pad, two defeated oil pipe, every are installed to the common symmetry in both ends of a ARC section of thick bamboo all install the oil collecting pipe on the defeated oil pipe, defeated oil pipe all is located one side that the ARC piston post was kept away from to the spacing ring with the junction of a ARC section of thick bamboo.

Further, rotatory feed mechanism is including fixing the first support on the organism lateral wall, it has the ring cover to install on the first support, annular spout has been seted up on the interior rampart of ring cover, slidable mounting has the tooth groove cover in the annular spout, even directional rotation inlays and is equipped with a plurality of rotatory balls on the interior rampart of tooth groove cover.

Further, a driving motor is fixedly installed on the outer side wall of the machine body, a gear groove disc is installed on a machine shaft of the driving motor, an arc-shaped notch is formed in the outer ring wall of the ring sleeve, a transmission gear belt is installed on the gear groove disc and the gear groove sleeve together, and the upper section of the transmission gear belt is arranged in the arc-shaped notch and is not in contact with the inner wall of the arc-shaped notch.

Further, centre gripping follower mechanism is including fixing the second support on the base is close to the upper surface of rotary feed mechanism one side, install the notch plate on the second support, two pneumatic cylinders, every are installed to the symmetry on the lateral wall of notch plate equal slidable mounting has a centre gripping hydraulic stem on the pneumatic cylinder, a plurality of homonymy the one end that the pneumatic cylinder was kept away from to the centre gripping hydraulic stem extends to the inboard and the fixed mounting of notch plate has arc splint, every equal directional rotation of homogeneous is equipped with a plurality of centre gripping balls on the inner wall of arc splint.

Furthermore, the rotation axis of each rotating ball is perpendicular to the space of the rotation axis of the tooth socket sleeve, the rotation axis of each clamping ball is parallel to the space of the rotation axis of the tooth socket sleeve, and the circle centers of the arc-shaped cylinder, the arc-shaped clamping plate and the ring sleeve are all located on the same horizontal straight line.

Further, install first position sensor on the organism is close to the upper surface of one side electromagnetism slide rail, the organism is close to the upper surface of two electromagnetism slide rails and installs the pipe support between two parties, the upper surface of organism is kept away from pipe support and control tank one side and is seted up and run through lateral wall feed opening from top to bottom, the organism is located the upper surface of feed opening one side and has seted up the adjustment tank, adjustment tank internal rotation installation adjusting screw, the last screw slider of installing of adjusting screw, screw slider slidable mounting is in the adjustment tank, adjusting screw's one end extends to the outside of organism and installs the regulation carousel, the pole of deciding the height is installed to the upper end of screw slider, decide to install second position sensor on the pole of high.

Has the advantages that: make the pipeline with cut mechanism synchronous motion through centre gripping follower mechanism, realize that relative static cuts for the pipeline incision is more level and smooth, makes pipeline rotation direction and saw mascerating machine rotate reverse opposite through rotatory feed mechanism with cutting the mechanism, realizes the relative rotation and cuts, makes to cut pipeline efficiency higher, and easy operation, and application scope is wide.

Drawings

FIG. 1 is a schematic structural diagram of an automatic fixed-length cutting device for industrial rigid pipes, which is provided by the invention;

FIG. 2 is a schematic sectional view of a machine body of the automatic fixed-length cutting device for industrial rigid pipes according to the present invention;

FIG. 3 is an enlarged view of a cutting mechanism part of the automatic fixed-length cutting equipment for industrial hard pipelines, which is provided by the invention;

FIG. 4 is a schematic sectional view of an arc-shaped cylinder of the automatic fixed-length cutting equipment for industrial hard pipelines, which is provided by the invention;

fig. 5 is an enlarged view of an arc-shaped clamping plate part of the automatic fixed-length cutting equipment for the industrial hard pipelines.

In the figure: 1 machine body, 11 control grooves, 12 feed openings, 13 adjusting grooves, 14 pipe frames, 15 first position sensors, 16 electromagnetic slide rails, 2 driving motors, 21 tooth groove discs, 22 transmission tooth belts, 3 rotary feeding mechanisms, 31 first supports, 32 ring sleeves, 33 annular slide grooves, 34 tooth groove sleeves, 35 arc-shaped notches, 36 rotary balls, 4 cutting mechanisms, 41 bases, 42 hydraulic push rods, 43 fixing plates, 5 clamping follow-up mechanisms, 51 second supports, 52 concave plates, 53 hydraulic cylinders, 54 clamping hydraulic rods, 55 arc-shaped clamping plates, 56 clamping balls, 6 arc-shaped cylinders, 61 limiting rings, 62 arc-shaped piston columns, 63 double arc-shaped return rods, 64 supporting plates, 65 saw blade machines, 66 oil conveying pipes, 67 oil collecting pipes, 7 adjusting screw rods, 71 screw hole sliding blocks, 72 adjusting rotary discs, 8 height fixing rods and 81 second position sensors.

Detailed Description

Referring to fig. 1-4, an automatic fixed-length cutting device for industrial hard pipelines comprises a machine body 1, a control groove 11 is formed in the upper surface of the machine body 1, two electromagnetic slide rails 16 are symmetrically installed on the side wall of the notch of the control groove 11, a cutting mechanism 4 is installed on the two electromagnetic slide rails 16 together, a clamping follow-up mechanism 5 is installed on the cutting mechanism 4, a rotary feeding mechanism 3 is installed on the side wall of the machine body 1, the cutting mechanism 4 comprises a base 41 which is slidably installed on the two electromagnetic slide rails 16, a plurality of hydraulic push rods 42 are symmetrically, slidably inserted and installed on the base 41 in a sealing manner, a fixing plate 43 is installed at the upper ends of the hydraulic push rods 42 together, two arc-shaped cylinders 6 are symmetrically and fixedly installed on the fixing plate 43, two limiting rings 61 are symmetrically installed inside each arc-shaped cylinder 6, an arc-shaped piston column 62 is installed between the two limiting rings 61 in each arc-shaped cylinder 6 in a sealing manner, equal fixed mounting has the double arc to return shape pole 63 on every arc piston post 62, the sealed slip of outer arc pole of every double arc returns shape pole 63 inserts the both ends of establishing at arc cylinder 6, two double arcs return the outside that the inner arc pole of shape pole 63 all is located two arc cylinders 6 and install backup pad 64 jointly, fixed mounting has blade saw machine 65 on the backup pad 64, two defeated oil pipe 66 are installed to the common symmetry in both ends of two arc cylinders 6, all install collecting oil pipe 67 on every defeated oil pipe 66, defeated oil pipe 66 all is located one side that arc piston post 62 was kept away from to spacing ring 61 with arc cylinder 6's junction.

The pipeline enters through the rotary feeding mechanism 3, so that the pipeline can rotate while being conveyed, the clamping follow-up mechanism 5 can clamp the pipeline after the pipeline moves to a set length, and the pipeline pushes the cutting mechanism 4 to move at a constant speed through the clamping follow-up mechanism 5, so that the cut of the pipeline can be smooth;

the two oil collecting pipes 67 are respectively connected with an external oil pump pipeline, so that the internal pressure input of the two oil collecting pipes 67 is opposite, the oil collecting pipe 67 on one side is enabled to generate positive pressure, the oil collecting pipe 67 on the other side is enabled to generate negative pressure, the pressure difference is generated in the arc-shaped cylinder 6 through the two oil conveying pipes 66, the arc-shaped piston column 62 is enabled to drive the double-arc-shaped return rod 63 to move in an arc shape, the saw blade machine 65 can be driven to move around the circle center in an arc shape through the supporting plate 64, the pipeline wall can be moved and cut by the saw blade machine 65, the friction force between the saw blade and the cut-off section of the pipeline during cutting is reduced, the service life of the saw blade machine 65 is prolonged, the port is prevented from being uneven due to serious abrasion of the cut-off section of the pipeline, and the saw blade machine 65 can move around the axis of the pipeline in an arc shape due to the fact that the pipeline is in a rotating state, the saw blade machine 65 can wind around the surface of the pipeline for a circle in a shorter time, namely, the pipeline can be cut off the pipeline more quickly, increase cutting speed, promote cutting efficiency.

Referring to fig. 1, 2 and 5, the rotary feeding mechanism 3 includes a first support 31 fixed on a side wall of the machine body 1, a ring sleeve 32 is installed on the first support 31, an annular chute 33 is formed on an inner annular wall of the ring sleeve 32, a spline sleeve 34 is installed in the annular chute 33 in a sliding manner, a plurality of rotary balls 36 are uniformly and directionally and rotatably embedded on the inner annular wall of the spline sleeve 34, a rotation axis of each rotary ball 36 is perpendicular to a rotation axis space of the spline sleeve 34, the outer side wall of the machine body 1 is fixedly provided with the driving motor 2, a spline disc 21 is installed on a shaft of the driving motor 2, an arc-shaped notch 35 is formed in the outer annular wall of the ring sleeve 32, the spline disc 21 and the spline sleeve 34 are jointly provided with the driving toothed belt 22, and an upper section of the driving toothed belt 22 is arranged in the arc-shaped notch 35 and is not in contact with an inner wall of the arc-shaped notch 35.

Driving motor 2 drives tooth's socket cover 34 through tooth groove dish 21 and driving cog belt 22 and rotates, the pipeline inserts in tooth's socket cover 34 through outside feeding equipment, make a plurality of rotatory balls 36 support the surface at the pipeline, because every rotatory ball 36's axis of rotation is fixed, make the pipeline can promote rotatory ball 36 and rotate and the straight line removes to centre gripping follower 5, then tooth's socket cover 34 rotates and can make the pipeline rotate and the straight line removes to centre gripping follower 5 through the frictional force of rotatory ball 36 with the pipeline outer wall, realize the rotatory feeding of pipeline.

Referring to fig. 1, 2 and 5, the clamping follow-up mechanism 5 includes a second bracket 51 fixed on the upper surface of the base 41 near one side of the rotary feeding mechanism 3, a concave plate 52 is installed on the second bracket 51, two hydraulic cylinders 53 are symmetrically installed on the outer side wall of the concave plate 52, a clamping hydraulic rod 54 is installed on each hydraulic cylinder 53 in a sliding manner, one ends of the clamping hydraulic rods 54 far away from the hydraulic cylinders 53 on the same side extend to the inner side of the concave plate 52 and are fixedly provided with arc-shaped clamping plates 55, a plurality of clamping balls 56 are uniformly and directionally rotated and embedded on the inner wall of each arc-shaped clamping plate 55, the rotation axis of each clamping ball 56 is parallel to the rotation axis space of the tooth socket sleeve 34, and the circle centers of the arc-shaped cylinder 6, the arc-shaped clamping plate 55 and the ring sleeve 32 are all located on the same horizontal straight line.

When detecting that the pipeline reaches the settlement length, pneumatic cylinder 53 promotes centre gripping hydraulic stem 54 and makes two arc splint 55 clip the pipeline, and make a plurality of centre gripping balls 56 support on the outer wall of pipeline, because centre gripping ball 56's axis of rotation is parallel with the axis of rotation of tooth's socket cover 34, then the rotation of pipeline can promote the directional rotation of a plurality of centre gripping balls 56, and the pipeline can promote two arc splint 55 through the frictional force of centre gripping ball 56 and pipeline outer wall and keep away from rotatory feed mechanism 3 and move, then can make centre gripping follower 5 and cut mechanism 4 along with pipeline synchronous motion, the realization is cut mechanism 4 and pipeline relatively static and is cut, the incision is more level and more smooth and cut off the position more accurate.

Referring to fig. 1 and 2, a first position sensor 15 is installed on the upper surface of the machine body 1 close to the electromagnetic slide rails 16 on one side, a pipe support 14 is installed in the middle of the upper surface of the machine body 1 close to the two electromagnetic slide rails 16, the upper surface of the machine body 1 is far away from the pipe support 14 and one side of the control groove 11 and is provided with a feeding hole 12 penetrating through the side wall, an adjusting groove 13 is formed in the upper surface of the machine body 1 on one side of the feeding hole 12, an adjusting screw 7 is installed in the adjusting groove 13 in a rotating mode, a screw sliding block 71 is installed on the adjusting screw 7 and is slidably installed in the adjusting groove 13, one end of the adjusting screw 7 extends to the outer side of the machine body 1 and is provided with an adjusting turntable 72, a height fixing rod 8 is installed at the upper end of the screw sliding block 71, and a second position sensor 81 is installed on the height fixing rod 8.

The electromagnetic slide rail 16 is used for pushing the base 41 to return, so that the cutting mechanism 4 and the clamping follower mechanism 5 reset, the first position sensor 15 can detect the position of the base 41, that is, when the cutting mechanism 4 and a pipeline move synchronously to cut, the base 41 moves to the second position sensor 81, the pipeline is cut, the external hydraulic equipment controls the hydraulic push rod 42 to drive the fixing plate 43 to move downwards, so that the arc-shaped cylinder 6 drives the supporting plate 64 and the saw blade machine 65 to move downwards through the double-arc-shaped return rod 63 to separate from the pipeline, automatic separation and automatic reset are realized, and the operation is more convenient;

pipe support 14 can support the pipeline, adjust carousel 72 through rotating and make adjusting screw 7 rotate, make screw slider 71 drive and decide high pole 8 and remove, then can change second position sensor 81's position, can adjust the pipeline that the testing distance made its reach different length as required promptly and cut, realize that many length of pipeline are adjustable cuts, the pipeline of accomplishing cuts is owing to the one end of keeping away from pipe support 14 does not support, make the one end of keeping away from pipe support 14 fall get into in feed opening 12 and the pulling remains the part and discharge from feed opening 12, realize automatic row material function.

External hydraulic equipment is arranged at the inner bottom of the control groove 11, then the two oil collecting pipes 67 and the base 41 are connected with the external hydraulic equipment, the pipeline is pushed into the tooth groove sleeve 34 through the external feeding equipment, the driving motor 2 is started, so that the driving motor 2 drives the tooth groove sleeve 34 to rotate through the tooth groove disc 21 and the transmission toothed belt 22, the pipeline is pushed to rotate by the plurality of rotary balls 36, and the pipeline moves linearly and pushes the plurality of rotary balls 36 to rotate;

when the pipeline continuously advances through the pipe frame 14 to reach the detection area, the second position sensor 81 detects the pipeline, the hydraulic cylinder 53 pushes the clamping hydraulic rod 54 to move, so that the two arc-shaped clamping plates 55 clamp the pipeline, the pipeline rotates to push the clamping ball 56 to rotate, the pipeline advances to push the arc-shaped clamping plates 55 to move linearly, the concave plate 52 and the second bracket 51 push the fixing plate 43 to move, the base 41 slides on the electromagnetic slide rail 16 through the hydraulic push rod 42, the cutting mechanism 4 and the clamping follow-up mechanism 5 move synchronously with the pipeline, and the cutting mechanism 4 and the pipeline move relatively still in the horizontal moving direction;

external hydraulic equipment supplies pressure through the base 41 to push the hydraulic push rod 42 to ascend, so that the arc-shaped cylinder 6 pushes the saw machine 65 upwards through the double arc-shaped return rod 63 and the support plate 64 to move, the saw machine 65 cuts the side wall of the pipeline, the pressure difference in the arc-shaped cylinder 6 is changed through the oil collecting pipe 67 and the oil conveying pipe 66, the arc-shaped piston column 62 drives the double arc-shaped return rod 63 to move around the axis of the pipeline, the pipeline and the saw machine 65 rotate relatively, and the saw machine 65 can cut off the pipeline quickly;

after the pipeline cuts the completion, cut the pipeline and keep away from the one end of centre gripping follower 5 and lose and support the whereabouts, make to cut the pipeline and go into in feed opening 12 and the roll-off from pipe support 14 is gone up, base 41 moves to first position sensor 15 department, then first position sensor 15 detects the signal, make outside hydraulic equipment pass through base 41 decompression drive hydraulic push rod 42 decline, make arc section of thick bamboo 6 drive saw mascerating machine 65 through double arc circle shape pole 63 and backup pad 64 and move down and break away from the pipeline, and pneumatic cylinder 53 control centre gripping hydraulic stem 54 returns, make two arc splint 55 loosen the pipeline, then centre gripping follower 5 and cutting mechanism 4 lose thrust, then electromagnetism slide rail 16 promotes to cut mechanism 4 and centre gripping follower 5 and resets, so repeatedly, can cut into a plurality of fixed length pipelines with longer pipeline.

Claims

1. The utility model provides an automatic cutting equipment of industry stereoplasm pipeline fixed length, includes organism (1), its characterized in that, control tank (11) have been seted up to the upper surface of organism (1), two electromagnetism slide rails (16) are installed to the symmetry on the notch lateral wall of control tank (11), two install jointly on electromagnetism slide rail (16) and cut mechanism (4), it installs centre gripping follower (5) on the mechanism (4) to cut, install rotatory feed mechanism (3) on the lateral wall of organism (1), it includes base (41) of slidable mounting on two electromagnetism slide rails (16) to cut mechanism (4), symmetrical sealed slip is inserted on base (41) and is installed a plurality of hydraulic push rod (42), and a plurality of fixed plate (43) are installed jointly to the upper end of hydraulic push rod (42), symmetrical fixed mounting has two arc section of thick bamboo (6) on fixed plate (43), two limiting rings (61) are symmetrically installed inside each arc-shaped cylinder (6), an arc-shaped piston column (62) is arranged between the two limiting rings (61) in each arc-shaped cylinder (6) in a sealing and sliding mode, double-arc-shaped return rods (63) are fixedly installed on each arc-shaped piston column (62), the outer arc rod of each double-arc-shaped return rod (63) is inserted at two ends of each arc-shaped cylinder (6) in a sealing and sliding mode, the inner arc rods of the two double-arc-shaped return rods (63) are arranged on the outer sides of the two arc-shaped cylinders (6) and are provided with supporting plates (64) together, a piece sawing machine (65) is fixedly arranged on the supporting plate (64), two oil delivery pipes (66) are symmetrically arranged at two ends of the two arc-shaped cylinders (6) together, an oil collecting pipe (67) is arranged on each oil delivery pipe (66), the joint of the oil delivery pipe (66) and the arc-shaped cylinder (6) is positioned on one side of the limiting ring (61) far away from the arc-shaped piston column (62).

2. The automatic fixed-length cutting equipment for the industrial hard pipelines is characterized in that the rotary feeding mechanism (3) comprises a first support (31) fixed on the side wall of the machine body (1), a ring sleeve (32) is installed on the first support (31), an annular sliding groove (33) is formed in the inner annular wall of the ring sleeve (32), a tooth groove sleeve (34) is installed in the annular sliding groove (33) in a sliding mode, and a plurality of rotary balls (36) are embedded in the inner annular wall of the tooth groove sleeve (34) in a uniformly and directionally rotating mode.

3. The automatic fixed-length cutting equipment for the industrial hard pipelines is characterized in that a driving motor (2) is fixedly installed on the outer side wall of the machine body (1), a gear groove disc (21) is installed on a machine shaft of the driving motor (2), an arc-shaped notch (35) is formed in the outer ring wall of the ring sleeve (32), a transmission toothed belt (22) is installed on the gear groove disc (21) and the gear groove sleeve (34) together, and the upper section of the transmission toothed belt (22) is placed in the arc-shaped notch (35) and is not in contact with the inner wall of the arc-shaped notch (35).

4. The automatic fixed-length cutting equipment for industrial hard pipelines according to claim 2, wherein the clamping follow-up mechanism (5) comprises a second support (51) fixed on the upper surface of one side, close to the rotary feeding mechanism (3), of the base (41), a concave plate (52) is installed on the second support (51), two hydraulic cylinders (53) are symmetrically installed on the outer side wall of the concave plate (52), each hydraulic cylinder (53) is provided with a clamping hydraulic rod (54) in a sliding mode, the clamping hydraulic rods (54) are arranged on the same side in a multiple mode, one end, far away from the hydraulic cylinders (53), of each clamping hydraulic rod (54) extends to the inner side of the concave plate (52) and is fixedly provided with an arc-shaped clamping plate (55), and each arc-shaped clamping plate (55) is embedded with a plurality of clamping balls (56) in a uniformly oriented rotating mode.

5. The automatic fixed-length cutting equipment for industrial hard pipes according to claim 4, characterized in that the rotation axis of each rotating ball (36) is spatially perpendicular to the rotation axis of the fluted sleeve (34), the rotation axis of each clamping ball (56) is spatially parallel to the rotation axis of the fluted sleeve (34), and the centers of the arc-shaped barrel (6), the arc-shaped clamping plate (55) and the ring sleeve (32) are all located on the same horizontal straight line.

6. The automatic fixed-length cutting equipment for industrial hard pipelines according to claim 1, wherein a first position sensor (15) is mounted on the upper surface of the machine body (1) close to the electromagnetic sliding rails (16) on one side, a pipe frame (14) is mounted in the middle of the upper surface of the machine body (1) close to the two electromagnetic sliding rails (16), one side of the upper surface of the machine body (1) away from the pipe frame (14) and the control groove (11) is provided with a feeding hole (12) penetrating through the side wall, an adjusting groove (13) is formed in the upper surface of the machine body (1) on one side of the feeding hole (12), an adjusting screw (7) is rotatably mounted in the adjusting groove (13), a screw sliding block (71) is mounted on the adjusting screw (7), the screw sliding block (71) is slidably mounted in the adjusting groove (13), one end of the adjusting screw (7) extends to the outer side of the machine body (1) and is provided with an adjusting turntable (72), fixed height pole (8) are installed to the upper end of screw slider (71), install second position sensor (81) on fixed height pole (8).