CN112008801A

CN112008801A - HDPE pipe punching method

Info

Publication number: CN112008801A
Application number: CN202010834958.6A
Authority: CN
Inventors: 商兆惠; 邵龙; 张利粉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2020-12-01

Abstract

The invention discloses a HDPE pipe punching method, which comprises the following steps: s1: putting a drilling device into an inner hole of the HDPE pipe to be processed; s2: adjusting the distance between the punches; s3: controlling the first support rod to support outwards to the inner wall of the HDPE pipe, and simultaneously controlling the second support rod to support outwards to the inner wall of the HDPE pipe; s4: driving a plurality of punches to puncture the pipe wall of the HDPE pipe; s5: driving a plurality of punches to be separated from the wall of the HDPE pipe; s6: controlling the first supporting rod to contract inwards to separate from the HDPE pipe wall; controlling the first supporting rod to move leftwards for a preset distance, and then controlling the first supporting rod to support outwards to the inner wall of the HDPE pipe; s7: the second support rod is controlled to be separated from the HDPE pipe wall, the second support rod is controlled to move leftwards for a preset distance, and the second support rod is controlled to be supported on the inner wall of the HDPE pipe; s8: repeating the processes of S6-S7 to enable the drilling device to move leftwards to the next drilling position, and repeating the processes of S2-S5 to continue drilling, so that the drilling processing of the HDPE pipe can be realized; the HDPE pipe punching method is simple to operate and high in punching efficiency.

Description

HDPE pipe punching method

Technical Field

The invention belongs to the technical field of HDPE (high-density polyethylene) pipes, and particularly relates to a HDPE pipe processing method.

Background

The water supply and drainage pipe is widely used in the water supply and drainage fields of highways, railway roadbeds, subway engineering, waste landfill sites, tunnels, green belts, playgrounds and the like, and underground irrigation and drainage systems of agriculture and horticulture. The existing metal water supply and drainage pipe is easy to corrode and rust, even causes serious problems of perforation, blockage and the like because the existing metal water supply and drainage pipe is buried underground for a long time. At present, HDPE pipes are developed rapidly, and are continuously replacing various metal pipes and pipes made of other traditional materials in various fields, and the HDPE pipes are formed by adopting advanced production processes and technologies through hot extrusion molding and have the characteristics of corrosion resistance, smooth inner walls, small flow resistance, high strength, good toughness, light weight and the like. When the HDPE pipe is used as a leakage pipe, a plurality of long holes or round holes need to be drilled on the HDPE pipe, then the pipe is buried into underground water, and water leaks into soil through the holes, because the pipe is often kept wet in the soil with water. At present, when HDPE (high-density polyethylene) leakage pipes are produced, drilling is carried out manually, and the following problems exist in manual drilling: 1. the precision of the drilling distance is low, and the error is large; 2. the efficiency is low, about 2000 holes need to be punched in each large pipe, and more than 10 hours are needed for completing the punching of one pipe; 3. the labor cost is high, which leads to high production cost of the HDPE leaky pipe.

Disclosure of Invention

The invention aims to provide a HDPE (high-density polyethylene) pipe punching method which is simple to operate and high in punching efficiency.

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

a HDPE pipe punching method comprises the following steps:

s1: putting a drilling device into an inner hole of the HDPE pipe to be processed;

s2: controlling the upper adjusting motor and the lower adjusting motor to synchronously rotate, and adjusting the distance between the punches;

s3: the first electric push rod is controlled to extend out to push the first support rod to be supported to the inner wall of the HDPE pipe outwards, and meanwhile, the second electric push rod is controlled to extend out to push the second support rod to be supported to the inner wall of the HDPE pipe outwards;

s4: controlling a driving motor to drive a left rotating disc and a right rotating disc to rotate, and driving a plurality of punches to puncture the pipe wall of the HDPE pipe;

s5: controlling a driving motor to drive a left turntable and a right turntable to rotate reversely, and driving a plurality of punches to be separated from the pipe wall of the HDPE pipe;

s6: controlling the first electric push rod to contract, and pulling the first support rod to contract inwards to separate from the HDPE pipe wall; controlling the upper adjusting motor and the lower adjusting motor to synchronously rotate, enabling the first supporting rod to move leftwards for a preset distance, and then controlling the first electric push rod to extend out to push the first supporting rod to outwards support the inner wall of the HDPE pipe;

s7: controlling the second electric push rod to contract, pulling the second support rod to contract inwards to separate from the HDPE pipe wall, controlling the upper adjusting motor and the lower adjusting motor to synchronously rotate reversely, enabling the second support rod to move leftwards for a preset distance, and then controlling the second electric push rod to extend out to push the second support rod to be supported outwards to the inner wall of the HDPE pipe;

s8: repeating the processes of S6-S7 can move the drilling device to the left all the time to the next drilling position, and then repeating the processes of S2-S5 to continue drilling, so that the drilling process of the HDPE pipe can be realized.

Furthermore, the drilling device comprises a middle rod, and a left upper guide sliding rod and a left lower guide sliding rod which are perpendicular to the middle rod are symmetrically arranged at the left end of the middle rod; the right end of the middle rod is symmetrically provided with a right upper guide sliding rod and a right lower guide sliding rod which are vertical to the middle rod; the middle rod is connected with a moving plate in a sliding mode, two first guide sliding rods are symmetrically arranged above the moving plate by taking the middle rod as a center, and two second guide sliding rods are symmetrically arranged below the moving plate by taking the middle rod as a center; the outer side of the middle rod close to the right end is provided with a fixed plate, and the fixed plate is parallel to the movable plate; two third guide sliding rods are symmetrically arranged above the fixed plate by taking the middle rod as a center, and two fourth guide sliding rods are symmetrically arranged below the fixed plate by taking the middle rod as a center;

the left upper guide sliding rod is connected with a left upper sliding frame in a sliding manner, and the right upper guide sliding rod is connected with a right upper sliding frame in a sliding manner; two upper sliding rods are arranged between the left upper sliding frame and the right upper sliding frame side by side, a plurality of upper sliding blocks are connected between the two upper sliding rods in a sliding manner, and a punch is arranged on each upper sliding block along the radial direction of the middle rod; two adjacent upper sliding blocks are connected through an upper connecting rod, and a right upper connecting rod is arranged between the upper sliding block at the rightmost end of the upper sliding rod and the right upper sliding frame; an upper screw rod parallel to the upper slide bar is arranged between the upper left sliding frame and the upper right sliding frame, the upper screw rod is in threaded connection with one of the upper slide blocks, and an upper adjusting motor for driving the upper screw rod to rotate is fixedly installed on the upper left sliding frame; the left lower guide sliding rod is connected with a left lower sliding frame in a sliding manner, and the right lower guide sliding rod is connected with a right lower sliding frame in a sliding manner; two lower sliding rods are arranged between the left lower sliding frame and the right lower sliding frame side by side, a plurality of lower sliding blocks are connected between the two lower sliding rods in a sliding manner, and a punch is arranged on each lower sliding block along the radial direction of the middle rod; two adjacent lower sliding blocks are connected through a lower connecting rod, and a right lower connecting rod is arranged between the lower sliding block at the rightmost end of the lower sliding rod and the right lower sliding frame; a lower screw rod parallel to the lower sliding rod is arranged between the left lower sliding frame and the right lower sliding frame, the lower screw rod is in threaded connection with one of the lower sliding blocks, and a lower adjusting motor for driving the lower screw rod to rotate is fixedly installed on the left lower sliding frame;

the two first guide sliding rods and the two second guide sliding rods are respectively connected with a first supporting plate in a sliding mode, each first supporting plate is provided with two first supporting rods, an upper sliding block in threaded connection with the upper screw rod is provided with an upper guide sliding block in sliding connection with the two first supporting rods, and a lower sliding block in threaded connection with the lower screw rod is provided with a lower guide sliding block in sliding connection with the two first supporting rods; the movable plate is provided with a first driving assembly for driving the first supporting plate to drive the first supporting rod to extend or retract; the two third guide sliding rods and the two fourth guide sliding rods are connected with second supporting plates in a sliding mode, and each second supporting plate is provided with two second supporting rods; the fixed plate is provided with a second driving component for driving the second supporting plate to drive the second supporting rod to extend or retract;

and a third driving assembly for driving the left upper sliding frame and the left lower sliding frame and the right upper sliding frame and the right lower sliding frame to move reversely is arranged in the middle rod.

Further, the third driving assembly comprises a driving motor, a left rotating disc and a right rotating disc; the driving motor is fixedly arranged at the right end of the middle rod, the left turntable is fixedly arranged at the left end of the output shaft of the driving motor, and the right turntable is fixedly arranged at the right end of the output shaft of the driving motor; a left elliptic groove is formed in the left rotary disc, an upper left convex column extending into the left elliptic groove is arranged on the upper left sliding frame, and a lower left convex column extending into the left elliptic groove is arranged on the lower left sliding frame; the right turntable is internally provided with a right elliptical groove, the upper right bracket is provided with an upper right convex column extending into the right elliptical groove, and the lower right bracket is provided with a lower right convex column extending into the right elliptical groove.

Furthermore, the first driving assembly comprises two first electric push rods which are fixedly arranged on the upper side and the lower side of the movable plate respectively along the direction parallel to the middle rod, and a first connecting rod is arranged between the telescopic end of each first electric push rod and the first supporting plate; when first electric putter stretches out, drive first bracing piece through first connecting rod and stretch out, when first electric putter contracts, drive first bracing piece through first connecting rod and drive first bracing piece withdrawal.

Furthermore, the second driving assembly comprises two second electric push rods which are fixedly arranged on the upper side and the lower side of the fixed plate respectively along the direction parallel to the middle rod, and a second connecting rod is arranged between the telescopic end of each second electric push rod and the second supporting plate; when the second electric push rod stretches out, the second support plate is driven by the second connecting rod to drive the second support rod to stretch out, and when the second electric push rod contracts, the second support plate is driven by the second connecting rod to drive the second support rod to retract.

Furthermore, an upper rotary groove is formed in the left side of the upper left sliding frame and outside the upper screw rod, an upper convex shoulder which is rotatably connected into the upper rotary groove is arranged outside the upper screw rod, an upper screw sleeve is fixedly installed at an opening of the upper rotary groove, and the upper adjusting motor is fixedly installed on the upper screw sleeve;

the left side of the left lower sliding frame is provided with a lower rotating groove on the outer side of the lower screw rod, the outer side of the lower screw rod is provided with a lower convex shoulder which is rotatably connected in the lower rotating groove, a lower threaded sleeve is fixedly installed at the opening of the lower rotating groove, and a lower adjusting motor is fixedly installed on the lower threaded sleeve.

Advantageous effects

Compared with the prior art, the technical scheme of the invention has the following advantages:

(1) the invention can realize walking in the pipe, complete automatic punching, does not need manpower, saves labor force and reduces processing cost;

(2) the invention can accurately adjust the axial spacing of the drill holes, has small error, and greatly improves the efficiency by using a plurality of punches along the axial direction to work simultaneously;

(3) the upper screw rod, the upper sliding block and the upper sliding block are connected and matched, so that all the punches positioned on the upper sliding block are uniformly distributed, the punching is uniform, the using effect of the HDPE pipe is facilitated, and similarly, the lower screw rod, the lower sliding block and the lower sliding block are connected and matched, so that all the punches positioned on the lower sliding block are uniformly distributed;

(4) the invention can control the uniform position of each punch and can adapt to the punching requirements of different densities;

(5) through the mode of punching from the inside to the outside, no scraps are generated, the cleaning is convenient, the generated waste is directly pushed out of the pipe, the inner pipe does not need to be cleaned after the processing, and the subsequent cleaning work is reduced;

(6) the invention can be suitable for punching of different pipe diameters.

Drawings

FIG. 1 is a structural view of a punching apparatus in the present invention;

FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 3 is a structural view of the left turn plate of the present invention;

FIG. 4 is a structural view of a right turn disc according to the present invention;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 6-8 are schematic views of the punching process of the present invention.

Detailed Description

Referring to fig. 1-2, a method for perforating an HDPE pipe comprises the following steps:

s1: putting a drilling device into an inner hole of the HDPE pipe 001 to be processed;

s2: controlling the upper adjusting motor 81 and the lower adjusting motor 82 to synchronously rotate, and adjusting the distance between the punches 19;

s3: the first electric push rod 4 is controlled to extend out to push the first support rod 31 to be supported to the inner wall of the HDPE pipe 001 outwards, and meanwhile, the second electric push rod 6 is controlled to extend out to push the second support rod 51 to be supported to the inner wall of the HDPE pipe 001 outwards;

s4: controlling a driving motor 9 to drive a left rotating disc 11a and a right rotating disc 11b to rotate, and driving a plurality of punches 19 to puncture the tube wall of the HDPE tube 001;

s5: controlling a driving motor 9 to drive a left rotating disc 11a and a right rotating disc 11b to rotate reversely, and driving a plurality of punches 19 to be separated from the tube wall of the HDPE tube 001;

s6: controlling the first electric push rod 4 to contract, and pulling the first support rod 31 to contract inwards to separate from the wall of the HDPE pipe 001; controlling the upper adjusting motor 81 and the lower adjusting motor 82 to synchronously rotate, enabling the first supporting rod 31 to move leftwards for a preset distance, and then controlling the first electric push rod 4 to extend out to push the first supporting rod 31 to outwards support the inner wall of the HDPE pipe 001;

s7: controlling the second electric push rod 6 to contract, pulling the second support rod 51 to contract inwards to separate from the wall of the HDPE pipe 001, controlling the upper adjusting motor 81 and the lower adjusting motor 82 to rotate reversely and synchronously, moving the second support rod 51 leftwards for a preset distance, and then controlling the second electric push rod 6 to extend out to push the second support rod 51 to support outwards to the inner wall of the HDPE pipe 001;

s8: the process of S6-S7 is repeated, the drilling device can move to the left all the time to the next drilling position, and then the process of drilling the HDPE pipe 001 can be realized by repeating S2-S5 to continue drilling.

The drilling device comprises a middle rod 1, wherein a left upper guide sliding rod 1a and a left lower guide sliding rod 1b which are vertical to the middle rod 1 are symmetrically arranged at the left end of the middle rod 1; the right end of the middle rod 1 is symmetrically provided with a right upper guide sliding rod 1c and a right lower guide sliding rod 1d which are vertical to the middle rod 1; the middle rod 1 is connected with a movable plate 2 in a sliding mode, two first guide sliding rods 21 are symmetrically arranged above the movable plate 2 by taking the middle rod 1 as a center, and two second guide sliding rods 22 are symmetrically arranged below the movable plate 2 by taking the middle rod 1 as a center; a fixed plate 101 is arranged on the outer side of the middle rod 1 close to the right end, and the fixed plate 101 is parallel to the movable plate 2; two third guide sliding rods 16a are symmetrically arranged above the fixed plate 101 by taking the middle rod 1 as a center, and two fourth guide sliding rods 16b are symmetrically arranged below the fixed plate 101 by taking the middle rod 1 as a center.

The left upper guide sliding rod 1a is connected with a left upper sliding frame 10a in a sliding manner, and the right upper guide sliding rod 1c is connected with a right upper sliding frame 10c in a sliding manner; two upper sliding rods 151 are arranged between the left upper sliding frame 10a and the right upper sliding frame 10c side by side, four upper

sliding blocks

121, 122, 123 and 124 are connected between the two upper sliding rods 151 in a sliding manner, and a punch 19 is arranged on each upper sliding block along the radial direction of the middle rod 1; two adjacent upper sliding blocks are connected through an upper connecting rod, and a right upper connecting rod 142 is arranged between the upper sliding block 124 at the rightmost end of the upper sliding rod 151 and the right upper sliding frame 10 c; an upper screw rod 71 parallel to the upper slide rod 151 is arranged between the left upper slide frame 10a and the right upper slide frame 10c, the upper screw rod 71 is in threaded connection with one upper slide block 121, and an upper adjusting motor 81 for driving the upper screw rod 71 to rotate is fixedly mounted on the left upper slide frame 10 a; the left lower guide sliding rod 1b is connected with a left lower sliding frame 10b in a sliding manner, and the right lower guide sliding rod 1d is connected with a right lower sliding frame 10d in a sliding manner; two lower sliding rods 152 are arranged between the left lower sliding frame 10b and the right lower sliding frame 10d side by side, four lower sliding blocks 131,132,133 and 134 are connected between the two lower sliding rods 152 in a sliding manner, and a punch 19 is arranged on each lower sliding block along the radial direction of the middle rod 1; two adjacent lower sliding blocks are connected through a lower connecting rod 143, and a right lower connecting rod 145 is arranged between the lower sliding block at the rightmost end of the lower sliding rod 152 and the right lower sliding frame 10 d; a lower screw 72 parallel to the lower sliding rod 152 is arranged between the left lower sliding frame 10b and the right lower sliding frame 10d, the lower screw 72 is in threaded connection with one of the lower sliding blocks 131, and a lower adjusting motor 82 for driving the lower screw 72 to rotate is fixedly mounted on the left lower sliding frame 10 b.

The two first guide slide bars 21 and the two second guide slide bars 22 are both connected with first support plates 3 in a sliding manner, each first support plate 3 is provided with two first support rods 31, an upper slide block 121 in threaded connection with the upper screw 71 is provided with an upper guide slide block 12a in sliding connection with the two first support rods 31, and a lower slide block 131 in threaded connection with the lower screw 72 is provided with a lower guide slide block 13a in sliding connection with the two first support rods 31; the movable plate 2 is provided with a first driving component for driving the first supporting plate 3 to drive the first supporting rod 31 to extend or retract; the two third guide sliding rods 16a and the two fourth guide sliding rods 16b are connected with second support plates 5 in a sliding mode, and each second support plate 5 is provided with two second support rods 51; and a second driving component for driving the second supporting plate 5 to drive the second supporting rod 51 to extend or retract is arranged on the fixed plate 101. And a third driving component for driving the left upper sliding frame 10a and the left lower sliding frame 10b, and the right upper sliding frame 10c and the right lower sliding frame 10d to move reversely is arranged in the middle rod 1.

The third driving assembly comprises a driving motor 9, a left rotating disk 11a and a right rotating disk 11 b; the driving motor 9 is fixedly arranged at the right end of the middle rod 1, the left turntable 11a is fixedly arranged at the left end of the output shaft of the driving motor 9, and the right turntable 11b is fixedly arranged at the right end of the output shaft of the driving motor 9; a left elliptic groove 11a1 is formed in the left turntable 11a, a left upper convex column 10a1 extending into the left elliptic groove 11a1 is arranged on the left upper slide 10a, and a left lower convex column 10b1 extending into the left elliptic groove 11a1 is arranged on the left lower slide 10 b; be equipped with right elliptical trough 11b1 in the right carousel 11b, be equipped with the upper right projection 10c1 that stretches into in the right elliptical trough 11b1 on the upper right carriage 10c, be equipped with the lower right projection 10d1 that stretches into in the right elliptical trough 11b1 on the lower right carriage 10 d.

The first driving assembly comprises two first electric push rods 4, the two first electric push rods 4 are respectively and fixedly arranged on the upper side and the lower side of the movable plate 2 along the direction parallel to the middle rod 1, and a first connecting rod 41 is arranged between the telescopic end of each first electric push rod 4 and the first supporting plate 3; when the first electric push rod 4 extends, the first support plate 3 is driven by the first connecting rod 41 to drive the first support rod 31 to extend, and when the first electric push rod 4 contracts, the first support plate 3 is driven by the first connecting rod 41 to drive the first support rod 31 to retract.

The second driving assembly comprises two second electric push rods 6, the two second electric push rods 6 are respectively and fixedly arranged on the upper side and the lower side of the fixed plate 101 along the direction parallel to the middle rod 1, and a second connecting rod 61 is arranged between the telescopic end of each second electric push rod 6 and the second supporting plate 5; when the second electric push rod 6 extends, the second support plate 5 is driven by the second connecting rod 61 to drive the second support rod 51 to extend, and when the second electric push rod 6 contracts, the second support plate 5 is driven by the second connecting rod 61 to drive the second support rod 51 to retract.

An upper rotary groove 10a2 is formed in the left side of the left upper sliding frame 10a and on the outer side of an upper screw 71, an upper shoulder 71a which is rotatably connected into the upper rotary groove 10a2 is formed in the outer side of the upper screw 71, an upper threaded sleeve 71b is fixedly installed at the opening of the upper rotary groove 10a2, and the upper adjusting motor 81 is fixedly installed on the upper threaded sleeve 71 b; the left side of the left lower slide 10b is provided with a lower rotary groove 10b2 at the outer side of the lower screw 72, the outer side of the lower screw 72 is provided with a lower shoulder 72a rotatably connected in the lower rotary groove 10b2, the opening of the lower rotary groove 10b2 is fixedly provided with a lower screw sleeve 72b, and the lower adjusting motor 82 is fixedly arranged on the lower screw sleeve 72 b.

In S2, when the upper adjustment motor 81 drives the upper screw 71 to rotate, the upper sliders in threaded connection with the upper screw 71 are driven to move along the upper slide bars 151, and when one of the upper sliders moves, the distances between the four upper sliders are controlled through the connection between the upper connecting rods and the right upper connecting rod, so as to adjust the distances between the upper punches 19 of the four upper sliders. The driving motor 9 in S4 and S5 drives the left turntable 11a and the right turntable 11b to rotate, when the left turntable 11a rotates, the left upper sliding frame 10a and the left lower sliding frame 10b are driven to move in opposite directions through the matching of the left elliptical groove 11a1 and the left upper convex column 10a1 and the left lower convex column 10b1, when the left upper sliding frame 10a and the left lower sliding frame 10b are completely extended, the left upper convex column 10a1 and the left lower convex column 10b1 are respectively located at two ends of a long axis of the left elliptical groove 11a1, and when the left upper sliding frame 10a and the left lower sliding frame 10b are completely retracted, the left upper convex column 10a1 and the left lower convex column 10b1 are respectively located at two ends of a short axis of the left elliptical groove 11a 1; when the right turntable 11b rotates, the right upper carriage 10c and the right lower carriage 10d are driven to move reversely by the matching of the right elliptical groove 11b1 and the right upper convex column 10c1 and the right lower convex column 10d1, when the right upper carriage 10c and the right lower carriage 10d are fully extended, the right upper convex column 10c1 and the right lower convex column 10d1 are respectively located at two ends of the long axis of the right elliptical groove 11b1, and when the right upper carriage 10c and the right lower carriage 10d are fully retracted, the right upper convex column 10c1 and the right lower convex column 10d1 are respectively located at two ends of the short axis of the right elliptical groove 11b 1.

In S6 and S7, when the upper adjustment motor 81 and the lower adjustment motor 82 rotate synchronously and the upper slider and the lower slider are driven to move by the upper screw 71 and the lower screw 72, respectively, the first support rod 31 and the moving plate 2 are driven to move by the upper guide slider 12a connected to the upper slider and the lower guide slider 13a connected to the lower slider, and when the first support rod 31 is supported on the inner wall of the HDPE pipe 001, the middle rod 1 moves along the axial direction of the HDPE pipe 001 along with the synchronous rotation of the upper adjustment motor 81 and the lower adjustment motor.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The HDPE pipe punching method is characterized by comprising the following steps:

2. The HDPE pipe drilling method according to claim 1, wherein the drilling device comprises an intermediate rod, and a left upper guide sliding rod and a left lower guide sliding rod which are perpendicular to the intermediate rod are symmetrically arranged at the left end of the intermediate rod; the right end of the middle rod is symmetrically provided with a right upper guide sliding rod and a right lower guide sliding rod which are vertical to the middle rod; the middle rod is connected with a moving plate in a sliding mode, two first guide sliding rods are symmetrically arranged above the moving plate by taking the middle rod as a center, and two second guide sliding rods are symmetrically arranged below the moving plate by taking the middle rod as a center; the outer side of the middle rod close to the right end is provided with a fixed plate, and the fixed plate is parallel to the movable plate; two third guide sliding rods are symmetrically arranged above the fixed plate by taking the middle rod as a center, and two fourth guide sliding rods are symmetrically arranged below the fixed plate by taking the middle rod as a center;

3. The HDPE pipe perforating method as claimed in claim 2, characterized in that the third driving assembly comprises a driving motor, a left turn plate, a right turn plate; the driving motor is fixedly arranged at the right end of the middle rod, the left turntable is fixedly arranged at the left end of the output shaft of the driving motor, and the right turntable is fixedly arranged at the right end of the output shaft of the driving motor; a left elliptic groove is formed in the left rotary disc, an upper left convex column extending into the left elliptic groove is arranged on the upper left sliding frame, and a lower left convex column extending into the left elliptic groove is arranged on the lower left sliding frame; the right turntable is internally provided with a right elliptical groove, the upper right bracket is provided with an upper right convex column extending into the right elliptical groove, and the lower right bracket is provided with a lower right convex column extending into the right elliptical groove.

4. The HDPE pipe punching method according to claim 2, wherein the first driving assembly comprises two first electric push rods, the two first electric push rods are respectively and fixedly installed on the upper side and the lower side of the movable plate along a direction parallel to the middle rod, and a first connecting rod is arranged between the telescopic end of each first electric push rod and the first supporting plate; when first electric putter stretches out, drive first bracing piece through first connecting rod and stretch out, when first electric putter contracts, drive first bracing piece through first connecting rod and drive first bracing piece withdrawal.

5. The HDPE pipe punching method according to claim 2, wherein the second driving assembly comprises two second electric push rods, the two second electric push rods are respectively and fixedly installed on the upper side and the lower side of the fixed plate along a direction parallel to the middle rod, and a second connecting rod is arranged between the telescopic end of each second electric push rod and the second supporting plate; when the second electric push rod stretches out, the second support plate is driven by the second connecting rod to drive the second support rod to stretch out, and when the second electric push rod contracts, the second support plate is driven by the second connecting rod to drive the second support rod to retract.

6. The HDPE pipe punching method according to claim 2, wherein the left side of the upper left sliding frame is provided with an upper rotary groove on the outer side of the upper screw rod, the outer side of the upper screw rod is provided with an upper convex shoulder which is rotatably connected in the upper rotary groove, an opening of the upper rotary groove is fixedly provided with an upper screw sleeve, and the upper adjusting motor is fixedly arranged on the upper screw sleeve;