CN110370696B - A production line suitable for large-diameter PVC-U double-wall corrugated pipes - Google Patents
A production line suitable for large-diameter PVC-U double-wall corrugated pipes Download PDFInfo
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- CN110370696B CN110370696B CN201910682857.9A CN201910682857A CN110370696B CN 110370696 B CN110370696 B CN 110370696B CN 201910682857 A CN201910682857 A CN 201910682857A CN 110370696 B CN110370696 B CN 110370696B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 238000005520 cutting process Methods 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 103
- 230000005540 biological transmission Effects 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 15
- 238000009826 distribution Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 5
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/18—Pleated or corrugated hoses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
本发明公开了一种适用于大口径PVC‑U双壁波纹管的生产线，包括挤出机、挤出机头、成型机、切割机及扩口机，挤出机为双螺杆挤出机，挤出机头的进料口与挤出机连接，机头的外圆周设有物料的内壁流道和外壁流道，内壁流道的尾部设有内壁出口，外壁流道的尾部设有外壁出口，外壁出口与成型机连接，内壁与外壁融合后输出到切割机，切割完成的管体输出到扩口机。该生产线生产的双壁波纹管误差小、稳定的，该生产线生产的双壁波纹管直径足够大，使用范围广，且能够解决进口PE、PP回料短缺的问题，更环保。
The invention discloses a production line suitable for large-caliber PVC-U double-wall corrugated pipes, including an extruder, an extruder head, a molding machine, a cutting machine and a belling machine. The extruder is a twin-screw extruder, the feed port of the extruder head is connected to the extruder, the outer circumference of the head is provided with an inner wall flow channel and an outer wall flow channel of the material, the tail of the inner wall flow channel is provided with an inner wall outlet, the tail of the outer wall flow channel is provided with an outer wall outlet, the outer wall outlet is connected to the molding machine, the inner wall and the outer wall are fused and then output to the cutting machine, and the cut pipe body is output to the belling machine. The double-wall corrugated pipes produced by the production line have small errors and are stable. The double-wall corrugated pipes produced by the production line have a large enough diameter and a wide range of use. It can solve the problem of shortage of imported PE and PP return materials and is more environmentally friendly.
Description
Technical Field
The invention relates to a production line of double-wall corrugated pipes, in particular to a production line of large-caliber PVC-U double-wall corrugated pipes suitable for 1.5 meters and more.
Background
The double-wall corrugated pipe is a novel pipe with corrugated outer wall and smooth inner wall. Are now widely used as buried drain pipes, underground cable pipes, etc., in place of conventional cast iron pipes, cement pipes, ordinary plastic pipes, and wound corrugated pipes to a considerable extent. Currently, the main varieties of double-wall corrugated pipes are polyvinyl chloride (PVC), high-density polyethylene (HDPE) and rigid polyvinyl chloride (PVC-U). Rigid polyvinyl chloride is widely used because of its light weight, high rigidity and strength, moisture resistance, corrosion resistance, low manufacturing cost, and the like. The external diameter of the PVC-U double-wall corrugated pipe existing in the market at present is 800mm and 1000mm, and the PVC-U double-wall corrugated pipe with larger caliber is required in many industries at present, such as 1500mm and above, and the existing PVC-U double-wall corrugated pipe can not meet the market demand.
PE materials are adopted in production, but the PE materials are difficult to recycle at present, and the PE materials are not environment-friendly enough.
The existing double-wall corrugated pipe flaring machine is not suitable for large-caliber double-wall corrugated pipes.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a production line which has small and stable error and is mainly suitable for large-caliber PVC-U double-wall corrugated pipes, the diameter of the double-wall corrugated pipes produced by the production line is large enough, the application range is wide, and the problem of short return materials of imported PE and PP can be solved.
The production line suitable for the large-caliber PVC-U double-wall corrugated pipe comprises an extruder, an extruder head, a forming machine, a cutting machine and a flaring machine, wherein the extruder is a double-screw extruder, a machine barrel is fixedly connected with a machine head connector, a double-screw is sleeved and fixed in the machine barrel with a heating ring arranged outside, one end of the double-screw is contacted with the machine head connector, a double hopper is arranged above the double-screw, a variable frequency motor drives the double-screw through a coupler, and the power of the variable frequency motor is distributed through a distribution box and then is conveyed to the double-screw;
The feeding hole of the extruder head is connected with the extruder, the outer circumference of the extruder head is provided with an inner wall runner and an outer wall runner of materials, the tail part of the inner wall runner is provided with an inner wall outlet, the tail part of the outer wall runner is provided with an outer wall outlet, the outer wall outlet is provided with an outer wall gap adjusting piece, the inner wall outlet is provided with an inner wall gap adjusting piece, and the inner wall outlet is connected with a water jacket;
The outer wall outlet is connected with a forming machine, the forming machine comprises a die body, an upper frame, a workbench, a middle frame and a forming machine base, the die body is fixed between the upper frame and the workbench, the workbench is fixed on the middle frame, the middle frame is fixed on the forming machine base, an upper driving device for driving the die body is fixedly arranged on the upper frame, a lower driving device for driving the die body is fixedly arranged between the workbench and the middle frame, the die body consists of a die closing insert block and a die separating insert block, the die closing insert block is connected with a first cylinder, the die separating insert block is connected with a second cylinder, an exhaust device is arranged at the bottoms of the die closing insert block and the die separating insert block, and a material recovery device is arranged at the position, corresponding to the exhaust device, on the workbench; the die assembly insert block is formed by fixing a left die block body and a right die block body through a connecting block, the end face of the die assembly insert block is provided with a wear-resistant key, the outer wall of the die assembly insert block and the inner wall of the die separation insert block are corrugated, and wave crests and wave troughs are continuously and alternately arranged; the left module body and the right module body of the die assembly insert block are provided with rack clamping plates, the back surfaces of wave troughs of the left module body and the right module body are provided with quenching plates, wear-resisting plates are arranged between the connecting blocks and the left module body and between the connecting blocks and the right module body, and each wave trough of the die assembly insert block is provided with a vacuum groove;
in the production process, the inner wall and the outer wall of the product are fused and then output to a cutting machine, a die body is fixed on a bracket on a pulley of the cutting machine, the die body is coaxial with the pulley of the cutting machine, a cutter holder body with a cutter is fixed on the pulley through a cutting rotating arm, a roller which is arranged below the pulley and walks on a guide rail of a base of the cutting machine is arranged, and an electric cabinet for placing electric equipment is fixed on the base of the cutting machine;
The pipe body after cutting is output to a flaring machine, the flaring machine comprises a heating furnace, a flaring frame, a conveying device and a flaring machine tail frame, the furnace wall of the heating furnace is fixed on a base of the flaring machine, a post-pushing pipe device is arranged inside the furnace wall, the flaring frame is fixed on the base of the flaring machine, a connecting slideway used for sliding the post-pushing pipe device is arranged between the heating furnace and the flaring frame, a conveying bracket and a transmission device of the conveying device are fixed on the base of the flaring machine, a conveying drive of the conveying device is arranged below the flaring frame, and a tail frame bracket, a turning roller and a pipe unloading device of the tail frame of the flaring machine are sequentially fixed on the base of the flaring machine.
Further preferably, the machine barrel is arranged in a segmented mode, the heating ring is arranged on the outer wall of the machine barrel in a segmented mode, the heating ring is a cast aluminum heating ring and a cast copper heating ring, a vent hole is formed in the side wall of one side of the machine barrel, one end of an air pipeline is connected with the vent hole, the other end of the air pipeline is connected with a vacuum exhaust system, and a pressure gauge is arranged on the side wall of the other side of the machine barrel.
Further preferably, the double screw is a conical screw, one end of the conical screw with small diameter is contacted with the machine head connector, and the other end of the conical screw with large diameter is connected with the distribution box.
Further preferably, the machine head connector is provided with a hanging lug, the hanging lug fastens the machine head connector and the machine barrel together, and the machine barrel is connected with the inside of the machine head connector by a key.
Further preferably, the outer wall runner be equipped with the outer wall gas outlet, the outer wall outlet is equipped with outer gas outlet, the inner wall runner is equipped with the inner wall gas outlet, the outer wall runner is equipped with vacuum exhaust system, the inner wall runner is equipped with vacuum exhaust system, is equipped with outer wall heating circle on the outer wall runner, is equipped with the inner wall heating circle on the inner wall runner, the water jacket connect outlet pipe and inlet tube respectively.
Further preferably, the driving device is a servo motor, a linear guide rail is arranged between the middle frame and the base, a ball screw is arranged on the guide rail, a ball screw is arranged between the workbench and the middle frame, rib plates are arranged between the upper frame and the workbench, the number of the rib plates is at least 2, and the rib plates are arranged in a crossed mode.
Further optimized, the bottom of the die closing insert block and the bottom of the die separating insert block are provided with exhaust devices, and the position on the workbench corresponding to the exhaust devices is provided with a material recovery device.
Further preferably, the die assembly insert block is formed by fixing a left die block body and a right die block body through a connecting block, the end face of the die assembly insert block is provided with a wear-resistant key, the outer wall of the die assembly insert block and the inner wall of the die separation insert block are corrugated, and wave crests and wave troughs are continuously and alternately arranged.
Further preferably, the left module body and the right module body of the die assembly insert block are provided with rack clamping plates, the back surfaces of wave troughs of the left module body and the right module body are provided with quenching plates, wear-resisting plates are arranged between the connecting blocks and the left module body and between the connecting blocks and the right module body, the length of the forming module is 500-550mm, each wave trough of the die assembly insert block is provided with a vacuum groove, and the bottom of the die assembly insert block is provided with an exhaust device.
Further optimizing, the cutter holder body constitute by cutter holder and cutter, the cutter holder is fixed on the cutter holder body seat, cutter holder body seat is connected with the cutting rocking arm, be equipped with the pinion rack on the cutter holder body seat, be equipped with on the pinion rack with the regulation tooth of gear engagement, cutter on the cutter holder body seat is driven by the hydro-cylinder and is cut the body, is equipped with cutting rocking arm, back shaft between cutter holder body seat and the hydro-cylinder, cutting rocking arm and back shaft connection, the back shaft is connected with one side of hydro-cylinder, the opposite side of hydro-cylinder is connected with the cutting frequency of adjusting the lead screw cutter holder body and is controlled by travel switch.
Further optimized, two linear guide rails are arranged on the base of the forming machine, one linear guide rail is a flat guide rail, and the other linear guide rail is a mountain guide rail.
Further preferably, the pulley is driven by a variable frequency motor, and the variable frequency motor drives the pulley to slide by a speed reducer, a chain and a chain wheel.
Further optimizing, the box body of heating furnace in be equipped with thermal-insulated heat preservation, be equipped with the heating pipe in the box body of heating furnace, the heating pipe includes interior heating pipe and outer heating pipe, outer heating pipe includes heating pipe and lower heating pipe, the heating pipe passes through upper and lower adjustment mechanism to be fixed inside the oven, push away the pipe device after with interior heating pipe coaxial, heating furnace body export the place ahead is equipped with the protection curtain, the motor passes through spool drive protection curtain.
Further preferably, the flaring frame comprises a flaring die head, the flaring die head is fixed on the base, the pipe pushing device can push the pipe body to the flaring die head, cooling devices are arranged above and below the flaring die head, and a positioning clamping block for positioning the pipe body is arranged in front of the flaring frame on the base.
Further preferably, the back pushing tube device comprises a pushing plate and a driving device, wherein the driving device is fixed on the pushing plate, and the pushing plate is in contact with the tube body.
Further preferably, the transmission device of the conveying device is hinged with the base of the flaring machine, a screw rod is arranged in front of the transmission device, and a photoelectric induction switch is arranged on the conveying device.
Further preferably, the transmission device comprises a conveying belt, a traction chain and a transmission system, wherein the transmission system drives the traction chain to drive and further drive the conveying belt, the conveying drive provides power for the transmission system, and a tail frame tray, a rotating roller and a tube unloading device of the tail frame of the flaring machine are respectively and independently fixed on the base of the flaring machine.
The invention has the advantages that: 1. the electric control cabinets of the double-screw extruder are independently arranged, and all the connecting wires adopt quick connectors. The double-feeding design does not need to manually fill parking materials, and can ensure the health of operators. The vacuum pipeline design is that the pipeline arrangement is convenient for cleaning accumulated materials in the pipeline, the pipeline is kept smooth, and the production efficiency is improved. The caliber of the produced double-wall corrugated pipe is larger, and the application range is wider.
2. The inner wall flow passage and the outer wall flow passage of the extruder head are stable, and bubbles are not easy to generate on the inner wall and the outer wall of the double-wall corrugated pipe. The ring stiffness of the double-wall bellows is enhanced. The machine faults are reduced, and the production efficiency is improved.
3. The upper and lower driving of the molding machine module are respectively driven by the servo motors, so that the phase of the upper gear is conveniently adjusted, the trouble of manually adjusting the phase of the upper gear is avoided, meanwhile, the driving links are fewer, the transmission accumulated error is reduced, and the transmission precision is improved. The combined and separated module plug structure is improved, the machine faults are reduced, and the production efficiency is improved. The original plug block moves up and down to bear force on one side, the phenomenon that the cylinder sometimes cannot run in place due to uneven force is caused, the machine can give an alarm, the working position is withdrawn, the production line is stopped, the alarm is released, and the pipe pulling can be continued. The production line thoroughly solves the problems. The workbench is in a transmission mode of a ball screw and a linear guide rail, and has the advantages of small friction coefficient, high transmission efficiency and high guiding precision. The workbench is provided with a ball screw in a left-right movement transmission mode, the ball screw is small in transmission friction coefficient, and a screw nut is small in clearance, so that the die gap is adjusted.
4. The front and back moving guide rail of the cutting machine slide is a mountain and flat, and compared with a common rectangular guide rail, the cutting machine slide has good linearity and no gap, and is beneficial to cutting. The angle of the cutter clamp body relative to the rotating shaft of the cutter clamp body seat can be adjusted through the gear and the adjusting teeth, the cutter clamp body does not need to be loosened, the adjustment is convenient, and the adjustment angle is based. The front and back walking of the cutting trolley is driven by a variable frequency motor, and can be synchronous with the moving speed of a driving module of the forming machine. The pipe is cut off by a high-speed steel blade, and no noise and cutting scraps are generated. The counting command of the tubing wave crest fluctuation travel switch is accurate.
5. The flaring machine preheats the pipe body before flaring, so that the flaring efficiency is improved. The protective curtain is arranged in front of the heating furnace of the flaring machine, so that heat loss is prevented, energy is saved, and flaring efficiency is improved. The upper and lower adjustment mechanism of the heating furnace can adjust the height of the tube body, so that the heating furnace is suitable for flaring of tube bodies with different diameters, and the application range is wider. The flaring frame is provided with a cooling device, so that flaring is more perfect and connection of the pipe body is facilitated. The conveying device of the flaring machine is more efficient in conveying the pipe body, and the conveying device can be adjusted in height, so that the flaring machine can be suitable for pipe body flaring of different pipe diameters.
6. The width of the die body is reduced, the die body can be used interchangeably with the matched modules on various types of molding machines, the distance between the main movement center of the molding machine and the front end of the workbench is short, the design of a machine head is facilitated, the pressure of a machine barrel short melt is easy to control, the tube drawing speed is high, and the manufacturing cost is reduced. The die closing and parting forces of the PVC-U pipe are larger than those of the HDPE pipe, and the end surface of the module is inlaid with a wear-resistant key to prevent the module from being napped during die closing and parting. When the PVC-U pipe is formed, the external air pressure is larger than PE, the clamping force of the rack clamping plate is larger, the back of the rack is easy to be napped, and in order to solve the problem, a quenching plate is embedded on the back of the rack. The waveform vacuumizing of the large-diameter PVC-U pipe is realized by adopting 1 joint and 1 vacuumizing, so that the vacuumizing rate is improved, and the appearance of the pipe is plumter.
Drawings
FIG. 1 is a schematic diagram of a twin screw extruder suitable for use with a large caliber PVC-U double wall corrugated pipe.
FIG. 2 is a schematic diagram of an extruder head suitable for use with a large caliber PVC-U double wall corrugated pipe.
Fig. 3 is a left side view of fig. 2.
Fig. 4 is a view F-F of fig. 3.
FIG. 5 is a schematic diagram of a forming machine suitable for large caliber PVC-U double wall corrugated pipe.
Fig. 6 is a right side view of fig. 4.
Fig. 7 shows an upper driving device.
Fig. 8 is a lower driving device.
Fig. 9 is a schematic view of a rail structure.
FIG. 10 is a schematic structural view of a forming module suitable for use in a large caliber PVC-U double wall corrugated pipe.
FIG. 11 is a schematic diagram of a cutter adapted for use with a large caliber PVC-U double wall corrugated pipe.
Fig. 12 is a left side view of fig. 11.
Fig. 13 is a schematic view of a holder body structure.
Fig. 14 is a schematic view of the structure of the gear and the adjusting teeth.
Fig. 15 is a schematic diagram of a running structure of the sled.
Fig. 16 is a schematic view of a rail structure.
Fig. 17 is a schematic diagram of the connection of the tool holder body to the cylinder.
Fig. 18 is a schematic view of stroke control.
Fig. 19 is a schematic view of the structure of the heating furnace.
Fig. 20 is a left side view of fig. 19.
Fig. 21 is a schematic structural view of a flare frame.
Fig. 22 is a right side view of fig. 21.
Fig. 23 is a schematic structural view of the conveying device.
Fig. 24 is a right side view of fig. 23.
Fig. 25 is a schematic view of a flaring machine tail frame structure.
Fig. 26 is a schematic structural view of the protective curtain.
The marks in the figure: the device comprises a 1-extruder, a 11-machine head connector, a 12-twin screw, a 13-heating ring, a 14-machine barrel, a 15-distribution box, a 16-coupling, a 17-variable frequency motor I, a 18-rack, a 19-twin hopper, a 131-copper casting heating ring, a 132-aluminum casting heating ring and a 141-pressure gauge.
The extruder comprises a 2-extruder head, a 21-inner wall runner, a 22-outer wall runner, a 23-feed inlet, a 24-water jacket, a 25-inner wall outlet, a 26-outer wall outlet, a 27-inner wall gap adjusting piece, a 28-outer wall gap adjusting piece, a 211-inner gas outlet, a 212-inner wall heating ring, a 221-outer gas outlet, a 222-outer wall heating ring, a 241-water inlet pipe and a 242-water outlet pipe.
The device comprises a 3-molding machine, a 31-mold body, a 32-upper frame, a 33-workbench, a 34-middle frame, a 35-molding machine base, a 36-mold clamping insert, a 37-mold separating insert, a 38-upper driving device, a 39-linear guide rail, 310-rib plates, 311-left mold blocks, 312-right mold blocks, 313-abrasion-resistant keys, 314-abrasion-resistant plates, 315-vacuum grooves, 316-exhaust devices, 317-material recovery devices and 318-connecting blocks.
The cutting machine comprises a 4-cutting machine body, a 41-pulley body, a 42-cutter holder body, a 43-cutting rotating arm, a 44-cutting machine base, a 45-guide rail, a 46-electric cabinet, a 47-roller, a 48-bracket, a 49-pipe body, a 421-cutter holder body, a 422-cutter, a 423-cutter holder body seat, a 431-toothed plate, a 432-gear, a 433-adjusting tooth, a 451-flat guide rail, a 452-mountain guide rail, a 411-variable frequency motor II, a 412-chain, a 413-chain wheel, a 424-oil cylinder, a 425-supporting shaft, a 426-adjusting screw and a 427-travel switch.
The device comprises a 5-flaring machine, a 51-heating furnace, a 52-flaring frame, a 53-conveying device, a 54-flaring machine base, a 55-flaring machine tail frame, a 511-furnace wall, a 512-post-pushing pipe device, a 513-motor, a 514-scroll, a 515-protective curtain, a 516-heating pipe, a 517-up-down adjusting mechanism, a 518-pipe frame, a 521-flaring die head, a 522-cooling device, a 523-positioning clamping block, a 531-conveying drive, a 532-bracket, a 533-transmission device, a 551-tail frame bracket, a 552-rotating roller, a 553-pipe unloading device, a 5121-push plate and a 5122-driving device.
Detailed Description
A production line suitable for the large-caliber PVC-U double-wall corrugated pipe is further described below with reference to the accompanying drawings.
The double-screw extruder suitable for the production line of the large-caliber PVC-U double-wall corrugated pipe comprises a machine head connector 11, a machine barrel 14, a distribution box 15, a coupler 16 and a variable frequency motor I17 which are sequentially fixed on a frame 18, wherein the machine barrel 14 is fixedly connected with the machine head connector 11, the machine barrel 14 is connected with the inside of the machine head connector 11 by adopting a key, and the outside of the machine barrel is fastened together through hanging lugs arranged on the machine head connector 11. The double screw 12 is sleeved and fixed in a machine barrel 14 provided with a heating ring 13 at the outside, the double screw 12 is used for heating PVC-U, one end of the double screw 12 is contacted with the machine head connector 11, and melted PVC-U is conveyed to the machine head connector 11. The double hopper 19 is arranged above the double screw 12 and is used for adding heat-sensitive plastics, the feeding step does not need to be manually added, the health of operators is guaranteed, the power of the extruder 1 is provided by the first variable frequency motor 17, the first variable frequency motor 17 drives the double screw 12 through the coupler 16, and the power of the first variable frequency motor 17 is distributed through the distribution box 15 and then is conveyed to the double screw 12.
The barrel 14 is arranged in sections, the heating rings 13 are also arranged on the outer wall of the barrel 14 in sections, the heating rings 13 are cast aluminum heating rings 13232 and cast copper heating rings 131, the length of the barrel 14 is determined according to the characteristics of PVC-U, for example, the length of each section of barrel 14 is set according to the melting speed of PVC-U, the length of the heating rings 13 is determined by the lengths of the barrels 14 of different sections, the heating rings 13 of different materials are set according to the melting degree of plastics of different positions, if the PVC-U is required to melt rapidly, the cast copper heating rings 131 with small specific heat capacity are selected outside the first section of barrel 14, and in order to prevent the PVC-U from being excessively melted due to rapid temperature rise of the heating rings, the cast aluminum heating rings 13232 with large specific heat capacity are arranged outside the tail end barrel 14.
The double screw 12 is a conical screw, one end with small diameter of the conical screw is in contact with the machine head connector 11, the diameter is small, the shearing force is small, PVC-U can not be degraded, one end with large diameter of the conical screw is connected with the distribution box 15, and the large shearing force is beneficial to feeding and plasticizing.
The side wall of one side of the machine barrel 14 is provided with a vent hole, one end of the air pipeline is connected with the vent hole, and the other end is connected with a vacuum exhaust system, so that accumulated materials in the pipeline can be cleaned conveniently, and the pipeline is kept smooth. The side wall of the other side of the machine barrel 14 is provided with a pressure gauge 141, so that the pressure in a pipeline can be monitored in real time, and smooth material conveying is ensured.
The coupling 16 is connected with a waterway system for cooling, and the coupling 16 is connected with an oil temperature cooling system for cooling. The waterway system and the electric control cabinet of the oil temperature cooling system are all independently arranged, and all connecting lines can be quickly spliced without mutual influence.
The double-screw extruder head suitable for the large-caliber PVC-U double-wall corrugated pipe comprises a feed inlet 23 connected with an extruder 1, materials enter the extruder head 2 from the feed inlet 23, an inner wall runner 21 and an outer wall runner 22 which form the inner wall and the outer wall of the double-wall corrugated pipe, enter the outer circumference of a machine barrel, an inner wall outlet 25 is arranged at the tail part of the inner wall runner 21, the inner wall is output by the inner wall outlet 25, an outer wall outlet 26 is arranged at the tail part of the outer wall runner 22, the outer wall is output by the outer wall outlet 26, the outer wall outlet 26 is provided with an outer wall gap adjusting piece 28, the inner wall and the outer wall are coaxial, no error is generated, the inner wall gap adjusting piece 27 is arranged at the inner wall outlet 25, and the number of the outer wall gap adjusting piece 28 and the inner wall adjusting piece is determined according to the length of the inner wall and the outer wall. The outer wall outlet 26 connects with the water jacket 24, the water jacket 24 enabling the outer wall to be quickly formed. For discharging gas in the forming process of the outer wall, forming bubbles on the outer wall to influence the annular rigidity of the double-wall corrugated pipe, arranging an outer wall air outlet on the outer wall runner 22, discharging the gas, arranging an outer air outlet 221 on the outer wall outlet 26, discharging the gas discharged from the outer air outlet 221 in a concentrated manner, arranging bubbles on the inner wall to influence the annular rigidity of the double-wall corrugated pipe, arranging an inner wall air outlet on the inner wall runner 21, discharging the gas, arranging an inner air outlet 211 on the inner wall outlet 25, and discharging the gas discharged from the inner air outlet 211 in a concentrated manner. For better exhausting gas and balancing the pressure in the outer wall runner 22 and the inner wall runner 21, the outer wall and the inner wall are formed more fully, the outer wall runner 22 is provided with a vacuum exhaust system, and the inner wall runner 21 is provided with a vacuum exhaust system. The outer wall runner 22 is provided with the outer wall heating ring 222 in a segmented manner, so that the outer wall can be formed by heating materials more uniformly, and the inner wall runner 21 is provided with the inner wall heating ring 212 in a broken manner, so that the inner wall can be formed by heating materials more uniformly. For cooling the outer wall, the water jacket 24 is connected to two water outlet pipes 242 and two water inlet pipes 241, respectively. The water jacket 24 is provided with an inner air hole 43 for discharging the air on the inner wall again and placing the inner wall to generate bubbles.
The forming machine 3 is suitable for large-caliber PVC-U double-wall corrugated pipes, the die body 31 is fixed between the upper frame 32 and the workbench 33, the die body 31 is mainly used for forming the outer wall of the double-wall corrugated pipe, the workbench 33 is fixed on the middle frame 34, the workbench 33 is used for placing the formed double-wall corrugated pipe, the middle frame 34 is fixed on the forming machine base 35, the upper driving device 38 used for driving the die body 31 is fixedly arranged on the upper frame 32, the lower driving device used for driving the die body 31 is fixedly arranged between the workbench 33 and the middle frame 34, the driving devices are servo motors 13, the upper driving device 38 and the lower driving device are respectively driven by the respective servo motors 13, the upper gear phase is conveniently adjusted, the trouble of manually adjusting the upper gear phase is avoided, meanwhile, the driving links are fewer, the transmission accumulated error is reduced, and the transmission precision is improved. The mold body 31 is composed of a mold closing insert block 36 and a mold separating insert block 37, wherein the mold closing insert block 36 is connected with the first air cylinder, and the mold separating insert block 37 is connected with the second air cylinder. The die assembly insert 36 and the die separation insert 37 have improved structures, reduce machine faults and improve production efficiency. The original plug block moves up and down to bear force on one side, the phenomenon that the cylinder sometimes cannot run in place due to uneven force is caused, the machine can give an alarm, the working position is withdrawn, the production line is stopped, the alarm is released, and the pipe pulling can be continued. The structure thoroughly solves the problems. A linear guide rail 39 is arranged between the middle frame 34 and the forming machine base 35, and a ball screw is arranged on the guide rail, so that the device is designed for the front-back movement of the workbench 33, and has the advantages of small friction coefficient, high transmission efficiency and high guiding precision. A ball screw is arranged between the workbench 33 and the middle frame 34, and the transmission mode is used for left and right movement of the workbench 33, the ball screw has small transmission friction coefficient, and a screw nut has small gap, so that die gap adjustment is facilitated. Ribs 310 are arranged between the upper rack 32 and the workbench 33, the number of the rib 310 is at least 2, and the rib 310 is arranged in a crossing way. The bottom of the mold closing insert block 36 and the bottom of the mold separating insert block 37 are provided with an exhaust device 316 for exhausting gas in the mold body 31, preventing bubbles from forming on the inner wall and the outer wall of the double-wall corrugated pipe, and the position on the workbench 33 corresponding to the exhaust device 316 is provided with a material recovery device 317 for collecting materials exhausted along with the gas and recovering and reutilizing the collected materials.
The forming module suitable for the large-caliber PVC-U double-wall corrugated pipe comprises a split die insert 37 and a die clamping block 36, wherein the forming module comprises a left die block body 311 and a right die block body 312, the left die block body 311 and the right die block body 312 are fixed through a connecting block 318 to form the die clamping insert 36, a wear-resistant key 313 is arranged on the end face of the die clamping insert 36, the die clamping and split force of the PVC-U double-wall corrugated pipe is larger than that of an HDPE pipe, and the wear-resistant key 313 is arranged on the end face of the die clamping and the die splitting of the PVC-U double-wall corrugated pipe to prevent the die clamping and the die splitting of the PVC-U double-wall corrugated pipe from being pulled. The outer wall of the combining module and the inner wall of the dividing module are in corrugated shapes, and the wave crests and the wave troughs are continuously and alternately arranged. The shape of the wave crest and the wave trough is just the same as that of the wave the wave crest and wave trough shapes of the pipes are matched. The left module body 1 and the right module body 2 of the forming module 3 are provided with rack clamping plates, the external air pressure is higher than PE during the forming of the PVC-U pipe, the clamping force of the rack clamping plates is higher, the back of the rack is easy to be napped, and in order to solve the problem, the back of the trough of the left module body 1 and the back of the trough of the right module body 2 are provided with quenching plates. A wear-resistant plate 314 is arranged between the left die body and the right die body of the connecting block 318. The length of the forming module 3 is 500-550mm, which is smaller than the original width, and can be used interchangeably with the matching modules of the SBZ1000 and SBZ1200 forming machine, the distance between the main movement center of the forming machine and the front end of the workbench is short, the machine head design is facilitated, the machine barrel is short, the melt pressure is easy to control, the tube drawing speed is high, and the manufacturing cost is reduced. A vacuum groove 315 is arranged at each trough of each sub-module, and 1 joint 1 pumping is adopted for waveform vacuumizing of the large-diameter PVC-U pipe, so that the pumping speed is improved, and the appearance of the pipe is plump. The bottom of the split insert block 37 is provided with an air exhaust device 316 to prevent air bubbles from forming on the outer wall of the double-wall corrugated pipe.
The cutting machine 4 suitable for the large-caliber PVC-U double-wall corrugated pipe is characterized in that after the double-wall corrugated pipe is formed, the cutting machine cuts a pipe body 49 according to actual requirements, the double-wall corrugated pipe die body 31 is fixed on a bracket 48 on a pulley 41 of the cutting machine, in order to ensure that the pipe body 49 is not eccentric during cutting, the double-wall corrugated pipe die body 31 is coaxial with the pulley 41 of the cutting machine, a cutter holder body 42 with a clamping cutter 422 is fixed on the pulley 41 through a cutting rotating arm 43, rollers 47 which are arranged below the pulley 41 and run on a guide rail 45 of a base 44 of the cutting machine are arranged, and an electric cabinet 46 for placing electric equipment is fixed on the base 44 of the cutting machine. The cutter 422 is made of steel.
The holder body 42 is composed of a holder 421 and a cutter 422, and the holder is fixed to a holder body seat 423, and the holder body seat 423 is connected to the cutting arm 43. The holder body seat 423 is provided with a toothed plate 431, the holder body 42 is provided with a gear 432, and the toothed plate 431 is provided with an adjusting tooth 433 engaged with the gear 432. The teeth of the gear 432 are meshed with the adjusting teeth 433 on the toothed plate 431, the angle of the cutter 422 clamp body 2 relative to the rotating shaft of the cutter holder body seat 423 can be adjusted through the gear 432 and the adjusting teeth 433, the cutter holder body 42 is not required to be loosened, adjustment is convenient, and the adjusted angle can be determined according to the number of teeth of the gear 432.
The pulley 41 is driven by a second variable frequency motor 411, and the second variable frequency motor 411 drives the pulley 41 to slide through a speed reducer 414, a chain 412 and a sprocket 413. The pulley 41 is driven by the variable frequency motor II 411 to walk forwards and backwards, and can be synchronous with the moving speed of the driving module of the forming machine, so that the forming and cutting synchronization can be ensured, and the cutting error is small.
Two guide rails 45 are arranged on the base 44 of the cutting machine, one guide rail 45 is a flat guide rail 451, the other guide rail is a mountain guide rail 452, the plane of the mountain guide rail 452 is higher than that of the flat guide rail 451, and the top of the mountain guide rail 452 is trapezoidal. The front and back moving guide rail of the cutter pulley 41 is a mountain and flat, compared with a common rectangular guide rail, the linearity is good, no gap exists, and the cutter pulley is beneficial to cutting.
The cutter 422 on the cutter holder body seat 423 is driven by the oil cylinder 424 to cut the pipe body 49, a cutting rotating arm 43 and a supporting shaft 425 are arranged between the cutter holder body seat 423 and the oil cylinder 424, the cutting rotating arm 43 is connected with the supporting shaft 425, the supporting shaft 425 is connected with one side of the oil cylinder 424, and the other side of the oil cylinder 424 is connected with an adjusting screw 426. The cylinder 424 rapidly drives the holder body seat 423 to drive the holder body 442 to move at a high speed, thereby enabling the steel blade to cut at a high speed without generating noise or flying chips.
The cutting frequency of the holder body 42 is controlled by a travel switch 427, and the travel switch 427 determines the cutting frequency of the holder body 42 and thus the cutting length of the pipe body 49 based on the number of peaks.
The flaring machine suitable for the large-caliber PVC-U double-wall corrugated pipe comprises a heating furnace 51, a flaring frame 52, a conveying device 53 and a flaring machine tail frame 55, wherein the furnace wall 11 of the heating furnace 51 is fixed on a base 54 of the flaring machine, and the heating furnace 51 can heat a pipe orifice to a proper temperature. The flaring frame 52 finishes the flaring function of the pipe body, the conveying device 53 rapidly conveys the pipe to the flaring machine tail frame 55, the flaring machine tail frame 55 can realize supporting the pipe body, and the pipe body can be automatically positioned according to different stations.
The box body of the heating furnace 51 is internally provided with a heat insulation layer, the box body of the heating furnace 51 is internally provided with a plurality of groups of heating pipes 516, the heating pipes 516 can be divided into an external heating pipe and an internal heating pipe according to the position of the heating double-wall corrugated pipe, the heating pipes are divided into an upper heating pipe and a lower heating pipe according to the external heating pipe, and a thermocouple is arranged to detect the heating temperature of the external heating pipe. The heating pipe 516 is fixed inside the furnace wall 511 through an up-down adjusting mechanism 517, the height of the heating pipe 516 can be adjusted through the up-down adjusting mechanism 517 according to the diameter of the pipe body, and the heating pipe 516 can change heating materials according to the material of the pipe body. The furnace wall 511 is internally provided with a back push pipe device 512, the back push pipe device 512 is coaxial with the inner heating pipe, the back push pipe device 512 is used for pushing the heated pipe body to a flaring die head 521 of the flaring machine 5, a vacuum pump fixed on a pedestal 54 of the flaring machine is started at the moment, the vacuum pump stops working after time delay, the back push pipe device 12 returns to the original position, meanwhile, a cooling device 22 is started, and a cooling device 522 can adopt a cooling fan or cooling water.
The flaring frame 52 is fixed on the flaring machine base 54, a connecting slideway for sliding the post-pushing pipe device 12 is arranged between the heating furnace 51 and the flaring frame 52, a conveying bracket 532 and a transmission device 533 of the conveying device 53 are fixed on the flaring machine base 54, a conveying drive 531 of the conveying device 53 is arranged below the flaring frame 52, and a tail frame bracket 551, a rotating roller 552 and a pipe unloading device 553 of a tail frame 55 of the flaring machine are sequentially fixed on the flaring machine base 54.
A protective curtain 515 is arranged in front of the outlet of the tube body of the heating furnace 51, the motor 513 drives the protective curtain 515 through a scroll 514, and when the tube body is not moved to a heating position, the protective curtain 515 is put down, and heat loss is placed, so that energy is saved.
The flaring frame 52 comprises a flaring die 521, the flaring die 521 is fixed on a flaring machine base 54, a post-pushing pipe device 512 can push a pipe body to the flaring die 521, and cooling devices 522 are arranged above and below the flaring die 521. The post-pushing tube device 512 comprises a pushing plate 5121 and a driving device 5122, wherein the driving device 5122 is fixed on the pushing plate 5121, the pushing plate 5121 is contacted with the tube body, the driving device 122 can be an oil cylinder, the oil cylinder pushes the pushing plate 5121, and the pushing plate 5121 pushes the tube body to move towards the flaring die head 521. The front of the flaring frame 52 on the flaring machine base 54 is provided with a positioning clamping block 523 for positioning the pipe body, and when the pipe body is flared, the positioning clamping block 523 positions the pipe body to prevent the pipe body from moving.
When the conveying drive 531 stops working, the conveying device 53 can be separated from the pipe body, the lead screw 534 is arranged in front of the conveying device 533, and the height of the lead screw 534 can be adjusted according to the diameter of the pipe body, so that the pipe body can be accurately conveyed to the tail frame 55 of the flaring machine.
The transmission 533 includes a conveyor belt 5331, a traction chain 5332, and a transmission system 5333, the transmission system 5333 driving the traction chain 5332 to drive the conveyor belt 5331, the conveyor drive 531 powering the transmission system 5333.
For convenient transportation, the tail frame bracket 51, the rotating roller 52 and the tube unloading device 53 of the tail frame 55 of the flaring machine are respectively and independently fixed on the base 54 of the flaring machine, the three parts can be transported independently during transportation, the tube body is transported to the tail frame bracket 51 by the transporting device 53 during use, the rotating roller 52 continuously takes the tube body to advance, and the tube body is transported to the tube unloading device 53.
In order to better control the conveying device 53, a photoelectric sensing switch is arranged on the conveying device 53.
The working process of the flaring machine 5 comprises the following steps: the heating furnace 51 heats the pipe orifice to a proper temperature through the outer heating pipe and the inner heating pipe, the post-push pipe device 512 pushes the pipe body to the flaring die 521, at this time, the vacuum pump fixed on the flaring machine base 54 is started, the vacuum pump is stopped after time delay, the post-push pipe device 512 returns to the original position, the cooling device 22 is started, after the pipe body is cooled, the conveying oil cylinder of the conveying device 553 pushes the conveying bracket 532 to move forward, the pipe orifice is pushed out of the flaring die 521, and the pipe body is conveyed by the conveying device 553 and then is continuously conveyed forward to the flaring machine tailstock 55.
The conveying device 53 works: when the cutter is started (not shown in the drawing), the motor 513 drives the transmission system 5333 and the traction chain 5332 to drive the conveying belt 5331 to convey the pipe body, when the pipe body is conveyed to the tail frame tray of the flaring machine tail frame 55, the photoelectric sensing switch senses that the pipe body is not in contact with the photoelectric sensing switch, namely, when the pipe body is separated from the photoelectric sensing switch, the motor 513 stops rotating, the conveying drive 531 is retracted, the traction chain 5332 leaves the surface of the pipe body, the pipe body stops, and the pipe body can be stably stopped on the flaring machine tail frame 55.
The flaring machine tailstock 55 functions to place the tube body after flaring. The main function is to support the tube and enable the tube to be positioned automatically. The three parts of the tail frame bracket 551, the roller 552 and the tube unloading device 553 of the tail frame 55 of the flaring machine are disassembled during transportation, and are spliced together after being transported to a destination and then are connected with the conveying device 53 for height adjustment. The pipe body is conveyed to the tailstock bracket 551 by the conveying device 53, and the rotating roller 552 continues to drive the pipe body to advance, so that the pipe body is conveyed to the pipe unloading device 553.
The working process of the production line comprises the following steps: the operating personnel adds the material into the double hopper 19 of extruder 1, the heating collar melts the material, get into extruder head 2 by feed inlet 23, the material of shaping outer wall gets into outer wall runner 22, the material of shaping inner wall gets into inner wall runner 21, inner wall heating collar 212 continues the heating to the inner wall material, outer wall heating collar 222 continues the heating to the outer wall material, when reaching that the material can flow in the runner, flow out extruder head 2 by inner wall export 25 and outer wall export 26 respectively, the inner wall gets into the shaping of water jacket 24, the shaping module of outer wall entering make-up machine 3 carries out the shaping, by compound die cartridge 36 and divide the die cartridge 37 pressfitting into the outer wall, the double-wall bellows is synthesized to the pressfitting after the inner wall outer wall shaping. After natural cooling, the double-wall corrugated pipe is conveyed to the cutting machine, the pipe body is cut according to actual needs, and the cutting machine of the production line is rapid in cutting, so that chipless cutting can be realized. After the pipe body is cut, the pipe body is conveyed to a flaring machine for flaring, and the flaring is used for subsequent connection of the pipe body.
The foregoing has shown and described the basic principles, principal structures and advantages of the invention. It will be appreciated by those skilled in the art that variations and modifications in size and orientation, etc. may be made to the invention without departing from the spirit and scope of the invention, and that such variations and modifications are within the scope of the invention as claimed.
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| CN117885262B (en) * | 2024-03-13 | 2024-05-31 | 福建同盛管业有限公司 | Processing and forming equipment and method based on HDPE double-wall corrugated pipe |
| CN119952947B (en) * | 2025-04-10 | 2025-06-10 | 广东中深塑科技有限公司 | Multiphase fluid co-cooling and shaping extruder for corrugated conical twin-screw extrusion |
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| CN100457424C (en) * | 2004-09-28 | 2009-02-04 | 杭州波达塑业有限公司 | Process for producing large caliber hard polyvinyl chloride double wall corrugated pipe |
| CN103203885A (en) * | 2013-03-14 | 2013-07-17 | 广东威立瑞科技有限公司 | Industrial plastic pipe production line |
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