CN113513638A

CN113513638A - Polyurethane thermal insulation composite pipe and forming device thereof

Info

Publication number: CN113513638A
Application number: CN202110752532.0A
Authority: CN
Inventors: 倪永明
Original assignee: Zhejiang Tiancheng Thermal Insulation Technology Co ltd
Current assignee: Zhejiang Tiancheng Thermal Insulation Technology Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-10-19
Anticipated expiration: 2041-07-02
Also published as: CN113513638B

Abstract

The invention relates to the technical field of polyurethane heat-insulating materials, in particular to a polyurethane heat-insulating composite pipe which comprises an inner pipe, wherein an anticorrosive layer is uniformly covered on the outer wall of the inner pipe, an outer pipe is sleeved outside the inner pipe, a polyurethane heat-insulating layer is filled between the outer pipe and the anticorrosive layer on the inner pipe, a heat-insulating layer is wrapped on the outer pipe, a forming device of the polyurethane heat-insulating composite pipe comprises a foaming extruder head, a round hole matched with the diameter of the inner pipe is formed in the middle of the foaming extruder head, an outer pipe extruder head is rotatably sleeved outside the foaming extruder head, and a spray box is arranged on one side of the tail end of the foaming extruder head. According to the invention, the inner pipe can pass through the matched structure of the foaming extruder head and the outer pipe extruder head, the outer pipe is wrapped and covered, and the polyurethane heat-insulating layer is filled, so that the inner pipe, the polyurethane heat-insulating layer and the outer pipe are synchronously molded in a section of area, the efficiency is higher, and the integrity of the pipe after molding is higher.

Description

Polyurethane thermal insulation composite pipe and forming device thereof

Technical Field

The invention relates to the technical field of polyurethane heat-insulating materials, in particular to a polyurethane heat-insulating composite pipe and a forming device thereof.

Background

The polyurethane thermal insulation pipe is formed by foaming a high-function polyether polyol composite material and multi-time methyl polyphenyl polyisocyanate as raw materials through chemical reaction. The polyurethane heat-insulating pipe is used for heat-insulating and cold-insulating engineering of indoor and outdoor various pipelines, centralized heat-supplying pipelines, central air-conditioning pipelines, chemical industry, medicine and other industrial pipelines. The polyurethane foaming heat preservation pipe is developed rapidly as an excellent heat insulation material since the emergence of polyurethane synthetic materials in the thirty years, the application range of the polyurethane foaming heat preservation pipe is wider and wider, and the polyurethane foaming heat preservation pipe is widely applied to various pipelines for heating, refrigeration, oil transportation, steam transportation and the like due to simple construction and remarkable energy-saving and corrosion-resistant effects.

Chinese patent No. CN109551776A discloses one-step molding equipment and a process for a polyolefin polyurethane heat-insulating composite pipe, which comprises a polyolefin inner pipe extruder, a vacuum sizing box, a spray cooling box, a blast drier, a first tractor, a plasma processor, a foaming and shaping device, a coating extruder and a second tractor; the foaming and shaping device comprises a foaming and shaping die, a polyurethane high-pressure foaming machine and a die temperature machine. Simultaneously, a one-step molding process of the polyolefin polyurethane heat-insulation composite pipe is also disclosed. Compared with the existing 'two-step method', the length of the pipe can be customized, the production efficiency is improved, and the product quality is ensured. Compared with the existing one-step method, the bonding force between the inner pipe and the polyurethane heat-insulating layer is improved, the axial shear strength meets the standard requirement, and the product quality is stable and reliable; the polyurethane heat-insulating layer is directly contacted with the outer protective layer, so that the binding power is ensured; the upper and lower streams are respectively provided with a tractor, and the two tractors perform differential traction to ensure the flatness and the centering of the inner pipe.

Although the technical solution in the above-mentioned comparison document can solve the problem to some extent, the following problems still exist:

(1) although the processing of the inner pipe, the polyurethane layer and the outer pipe is a continuous production line, the processing and the forming are carried out through three sections, each section is processed to be relatively stable and then is subjected to combined processing, the processing efficiency is low, and the integrity of the pipe is reduced.

(2) The plastic tubing coats into the polyurethane heat preservation again after spray cooling and forced air drying, and this time because the plastic tubing has the shaping stable, this can lead to the adhesion force between polyurethane heat preservation and the plastic tubing to weaken, causes to appear becoming flexible between polyurethane heat preservation and the plastic tubing and breaks away from in the later stage use, and the heat preservation effect reduces.

(3) The polyurethane foaming layer is injected from one side of the outer wall of the inner pipe through the high-pressure mixing gun head during molding, the periphery of the inner pipe is fully distributed by pushing and extruding the polyurethane foaming material by the aid of the polyurethane foaming material, but the polyurethane foaming material can be quickly solidified after being injected and discharged, so that the polyurethane foaming material is unevenly distributed, and accordingly the heat preservation effect is unstable.

(4) The outer pipe of the polyurethane heat-insulation composite pipe has certain flexibility when not completely fixed at the initial molding stage, and is directly pulled to risk distortion.

(5) The outer wall of the inner pipe of the polyurethane heat-insulating composite pipe is smooth, and the bonding contact surface between the polyurethane foaming material and the inner pipe is small.

Disclosure of Invention

The invention aims to provide a polyurethane heat-insulating composite pipe and a forming device thereof, which aim to solve the problems in the background technology.

The technical scheme of the invention is as follows: polyurethane heat preservation composite pipe, including the inner tube, evenly cover on the inner tube outer wall has the anticorrosive coating, and the inner tube overcoat is equipped with the outer tube, and it has the polyurethane heat preservation to fill between the anticorrosive coating on outer tube and the inner tube to the outer tube is wrapped and is equipped with the insulating layer.

Preferably, the outer wall of the inner pipe is uniformly provided with concave grooves;

the heat insulation layer is uniformly and spirally wound on the outer wall of the outer pipe.

The invention also provides a forming device of the polyurethane heat-insulation composite pipe, which comprises a foaming extruder head, wherein a round hole matched with the diameter of the inner pipe is formed in the middle of the foaming extruder head, the outer pipe extruder head is rotatably sleeved outside the foaming extruder head, a spray box is arranged on one side of the tail end of the foaming extruder head, a grooving mechanism is arranged on one side, away from the foaming extruder head, of the spray box, the grooving mechanism comprises a first rotating ring, one side of the first rotating ring is connected with a cutter head through a support arm, a winding mechanism is arranged on one side of the head end of the foaming extruder head, the winding mechanism comprises a second rotating ring, and a rotating cylinder is arranged on one side of the second rotating ring.

Preferably, an annular extrusion flow channel is arranged in the side wall of the foaming extruder head, a ring cover is rotatably sleeved outside the foaming extruder head, the inner cavity of the ring cover is communicated with the extrusion flow channel, and a polyurethane foaming extruder is fixedly connected to one side of the ring cover;

an annular extrusion flow channel is arranged in the side wall of the outer pipe extrusion machine head, the outlet position of the extrusion flow channel on the outer pipe extrusion machine head corresponds to the outlet position of the extrusion flow channel on the foaming extruder head, and one side of the outer pipe extrusion machine head is fixedly connected with the outer pipe extruder.

Preferably, the outer wall of foaming extruder head rotates and is connected with the ring seat, and the outer wall of foaming extruder head is connected with rotary mechanism, and rotary mechanism includes the ring gear, and the fixed cover of ring gear is located outside the foaming extruder head, and one side meshing of ring gear is connected with rotary gear, and one side of rotary gear is connected with the rotation control motor.

Preferably, the fixed first interior ring gear that is provided with on the inner wall of first change, the inboard meshing of first interior ring gear is connected with first change ring drive gear, and one side of first change ring drive gear is connected with first change ring control motor, and first change ring control motor fixed mounting is on first support ring, and one side and the first change ring of first support ring rotate to be connected, one side of blade disc is connected with the blade disc motor, and the one end that the blade disc was kept away from to the support arm rotates the one end that is connected with the push-and-pull jar, and the other end and the first change ring of push-and-pull jar rotate to be connected, the middle part and the first change ring rotation of support arm are connected.

Preferably, the notching mechanism is sleeved with a cleaning box, round holes are symmetrically formed in two sides of the cleaning box, rubber ring sheets are arranged in the round holes, and the rubber ring sheets are of a waveform structure;

the cleaning box is internally provided with a gas transmission ring pipe, the gas transmission ring pipe is positioned on one side of the first rotating ring, which is close to the foaming extruder head, the inner wall of the gas transmission ring pipe is uniformly provided with gas nozzles in a surrounding manner, one side of the gas transmission ring pipe is communicated with an outlet of a high-pressure fan, and the high-pressure fan is positioned outside the cleaning box;

one side of the cleaning box is communicated with an inlet of an air suction fan, and an outlet of the air suction fan is communicated with an inlet of a dust filtering box.

Preferably, a round hole on one side of the cleaning box, which is close to the foaming extruder head, is communicated with one side of the spray box, two sections of spaces are arranged in the spray box, an oil delivery ring pipe is arranged in one section of the two sections of spaces, which is close to the cleaning box, the inner wall of the oil delivery ring pipe is uniformly provided with atomizing nozzles in a surrounding manner, and one side of the oil delivery ring pipe is connected with an oil tank through a high-pressure pump;

the other section of space of the spray box is communicated with one end of an air pipe, and the other end of the air pipe is connected with an outlet of an air heater.

Preferably, a second inner gear ring is arranged on the inner wall of the second rotating ring, the inner side of the second inner gear ring is connected with a second rotating ring driving gear in a meshed manner, one side of the second rotating ring driving gear is connected with a second rotating ring control motor, the second rotating ring control motor is fixedly arranged on a second support ring, and one side of the second support ring is rotationally connected with the second rotating ring;

the inner side of the second inner gear ring is fixed with a supporting rod, one side of the supporting rod is provided with a fixed clamping wheel, one side of the fixed clamping wheel is aligned with an elastic clamping wheel, one end of the elastic clamping wheel is connected with a sliding rod, the sliding rod is connected with the supporting rod in a sliding mode, and an extension spring is connected between the sliding rod and the supporting rod.

Preferably, a pipe traction machine and a pipe conveying mechanism are respectively arranged on one sides of the winding mechanism and the notching mechanism, which are far away from the foaming extruder head, the pipe traction machine comprises a traction roller, and one end of the traction roller penetrates through the second vertical frame to be connected with a traction motor;

the pipe conveying mechanism comprises a pipe conveying roller, and one end of the pipe conveying roller penetrates through the first vertical frame to be connected with a pipe conveying motor;

and a cooling spray nozzle is arranged between the pipe tractor and the winding mechanism, and the outer wall of the cooling spray nozzle is connected with a ring frame.

Compared with the prior art, the polyurethane heat-insulating composite pipe and the forming device thereof provided by the invention have the following improvements and advantages:

one is as follows: according to the invention, through the matching structure of the foaming extruder head and the outer pipe extruder head, the outer pipe can be wrapped and covered and the polyurethane heat-insulating layer can be filled while the inner pipe passes through the outer pipe, so that the inner pipe, the polyurethane heat-insulating layer and the outer pipe are synchronously molded in a section of area, the efficiency is higher, and the integrity of the pipe after molding is higher;

the second step is as follows: according to the invention, the polyurethane foaming extruder can push and extrude materials into the foaming extruder head, and then the materials are discharged from the opening at one side of the extrusion flow channel on the foaming extruder head, so that the foaming materials can be uniformly filled between the inner pipe and the outer pipe, the polyurethane foaming extruder is rotationally communicated with the foaming extruder head through the ring cover, the foaming extruder head can extrude the foaming materials in the rotating process, the polyurethane foaming materials are more uniformly filled between the inner pipe and the outer pipe, the adhesion between the polyurethane foaming and the inner pipe and the outer pipe is more uniform and stable, and the polyurethane foaming and the inner pipe and the outer pipe are prevented from being separated;

and thirdly: according to the invention, the outer pipe extruder and the polyurethane foaming extruder have the same structure, can push and extrude plastic materials, shear and mix the plastic materials at the same time, enable the materials to enter the outer pipe extruder head, and finally extrude the materials from the opening at one side of the extrusion flow channel on the outer pipe extruder head, so that the outer pipe is formed;

fourthly, the method comprises the following steps: according to the invention, the cutter motor can drive the cutter to rotate at a high speed, the push-pull cylinder can push and pull one end of the support arm through telescopic motion, the other end of the support arm is controlled to be close to or separated from the inner tube, when the other end of the support arm is controlled to be close to the inner tube, the cutter rotating at a high speed can cut a concave groove on the outer wall of the inner tube, and the cutting depth of the cutter can be adjusted by controlling the distance between the other end of the support arm and the inner tube;

and fifthly: according to the invention, the inner pipe can penetrate through the cleaning box, so that the grooving process of the inner pipe is carried out in the cleaning box, the noise can be reduced, and the flying dust generated in the grooving process can be inhibited from floating;

and the sixth step: in the invention, the inner pipe can penetrate through the gas transmission ring pipe, and the gas nozzle on the inner wall of the gas transmission ring pipe can uniformly and stably spray gas flow to the inner pipe under the gas supply of the high-pressure fan to clean dust attached to the outer wall of the inner pipe; the air suction fan can suck dust blown down by the air nozzle in the cleaning box and then convey the dust into the dust filtering box, so that environment-friendly discharge is realized;

and the seventh step: according to the invention, the second rotating ring control motor drives the inner gear ring to rotate through the second rotating ring driving gear, so that the second rotating ring is driven to rotate, the rotating drum on one side of the second rotating ring can rotate around the composite pipe, the heat insulation layer can be conveniently wound outside the composite pipe, the winding of the heat insulation layer can compress and shape the outer pipe which is just extruded, the connection tightness of the outer pipe and the polyurethane heat insulation layer is promoted, and a layer of protection can be formed on the outer side of the outer pipe;

eight of them: according to the invention, the cooling spray head is arranged in front of the pipe tractor, so that the outer pipe and the polyurethane heat-insulating layer can be in contact with the traction roller of the pipe tractor after being cooled and solidified, and the pipe is prevented from being dragged and distorted;

nine steps are as follows: according to the invention, the anti-corrosion layer is arranged between the inner pipe and the polyurethane heat-insulating layer, so that the outer wall of the inner pipe can be prevented from being loosened and separated from the polyurethane heat-insulating layer due to rust and corrosion, and the heat-insulating layer can improve the overall heat-insulating performance of the composite pipe and can protect the outer pipe from being directly damaged by external force collision, so that the polyurethane heat-insulating composite pipe has stronger and more durable performance; through the structural design of concave groove, let the surface unevenness of inner tube, have bigger surface area for the bonding surface between polyurethane heat preservation and the inner tube increases, and the increase of bonding friction force lets being connected between polyurethane heat preservation and the inner tube more stable firm, and the spiral winding mode of insulating layer can be even stable form the protection at the outer wall of outer tube.

Drawings

The invention is further explained below with reference to the figures and examples:

FIG. 1 is a top view of the internal structure of the present invention;

FIG. 2 is an enlarged schematic view of the invention at A in FIG. 1;

FIG. 3 is a cross-sectional view of the ring cover and foaming extruder head of the present invention;

FIG. 4 is a cross-sectional view of an outer tube extruder head of the present invention;

FIG. 5 is a cross-sectional view of a foaming extruder head and ring seat of the present invention;

FIG. 6 is a front view of a foaming extruder head of the present invention;

FIG. 7 is a side view of the first swivel ring of the present invention;

FIG. 8 is a side view of the oil transfer loop of the present invention;

FIG. 9 is a side view of the first internally toothed ring and the first rotary ring drive gear of the present invention;

FIG. 10 is a side view of a second swivel of the present invention;

FIG. 11 is a cross-sectional view of a strut and rod connection of the present invention;

FIG. 12 is a side view of a cooling spray head of the present invention;

FIG. 13 is a side view of the tube delivery mechanism of the present invention;

FIG. 14 is a front view of the insulation layer of the present invention;

FIG. 15 is a cross-sectional view of a polyurethane insulated composite pipe of the present invention.

Description of reference numerals: 1. an outer pipe extruder, 11, an outer pipe extruder head, 2, a polyurethane foaming extruder, 21, a ring cover, 22, a foaming extruder head, 3, a rotating mechanism, 31, a rotating control motor, 32, a toothed ring, 33, a rotating gear, 4, a grooving mechanism, 41, a cutter head, 42, a support arm, 43, a cutter head motor, 44, a first rotating ring, 45, a first support ring, 46, a first inner toothed ring, 47, a first rotating ring driving gear, 48, a first rotating ring control motor, 49, a push-pull cylinder, 5, a spray box, 51, an air pipe, 52, a hot air blower, 53, an oil box, 54, a high-pressure pump, 55, an oil conveying ring pipe, 56, an atomizing nozzle, 6, a cleaning box, 61, a high-pressure fan, 62, an air suction fan, 63, a dust filtering box, 64, an air conveying ring pipe, 65, an air injection head, 66, a rubber ring sheet, 7, a pipe conveying mechanism, 71, a pipe conveying motor, 72, a first vertical frame, 73, Pipe conveying roller 8, winding mechanism 81, drum 82, second rotating ring 83, second supporting ring 84, second inner toothed ring 85, second rotating ring driving gear 86, second rotating ring control motor 87, elastic clamping wheel 88, fixed clamping wheel 89, support rod 810, slide rod 811, tension spring 9, pipe tractor 91, traction roller 92, traction motor 93, second stand 10, cooling spray head 101, ring stand 1101, inner pipe 1102, anticorrosive layer 1103, polyurethane heat-insulating layer 1104, outer pipe 1105, heat-insulating layer 12, ring seat.

Detailed Description

The present invention is described in detail below, and technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a polyurethane heat-insulating composite pipe and a forming device thereof through improvement, and the technical scheme of the invention is as follows:

the first embodiment is as follows:

as shown in fig. 1, 2, 14 and 15, the polyurethane thermal insulation composite pipe includes an inner pipe 1101, the inner pipe 1101 may be a steel pipe and serves as a supporting framework, an outer wall of the inner pipe 1101 is uniformly covered with an anti-corrosion layer 1102, the anti-corrosion layer 1102 may be epoxy resin paint, an outer pipe 1104 is sleeved outside the inner pipe 1101, a polyurethane thermal insulation layer 1103 is filled between the outer pipe 1104 and the anti-corrosion layer 1102 on the inner pipe 1101, a thermal insulation layer 1105 is wrapped on the outer pipe 1104, and the thermal insulation layer 1105 may be an aluminum foil material.

Through set up anticorrosive coating 1102 between inner tube 1101 and polyurethane heat preservation 1103, can prevent on the outer wall of inner tube 1101 that rust rot and lead to breaking away from with the not hard up of polyurethane heat preservation 1103, and insulating layer 1105 not only can improve the holistic thermal insulation performance of composite pipe, and can protect outer pipe 1104 directly to receive external force collision damage for the composite pipe of polyurethane heat preservation has stronger more durable performance.

The outer wall of the inner pipe 1101 is uniformly provided with concave grooves;

the insulation layer 1105 is uniformly helically wound around the outer wall of the outer tube 1104.

Through the structural design of concave groove, let the surface unevenness of inner tube 1101, have a bigger surface area for the bonding surface between polyurethane heat preservation 1103 and the inner tube 1101 increases, and bonding frictional force increases, lets the connection between polyurethane heat preservation 1103 and the inner tube 1101 more stable firm, and the spiral winding mode of insulating layer 1105 can be even stable forms the protection at the outer wall of outer tube 1104.

Example two:

as shown in fig. 1 and fig. 3 to fig. 13, the embodiment discloses a forming device of a polyurethane thermal insulation composite pipe based on embodiment 1, which includes a foaming extruder head 22, a circular hole matched with the diameter of an inner pipe 1101 is formed in the middle of the foaming extruder head 22, an outer pipe extruder head 11 is rotatably sleeved outside the foaming extruder head 22, a spray box 5 is disposed on one side of the tail end of the foaming extruder head 22, a grooving mechanism 4 is disposed on one side of the spray box 5 away from the foaming extruder head 22, the grooving mechanism 4 includes a first swivel 44, one side of the first swivel 44 is connected with a cutter head 41 through a support arm 42, a winding mechanism 8 is disposed on one side of the head end of the foaming extruder head 22, the winding mechanism 8 includes a second swivel 82, and a swivel 81 is disposed on one side of the second swivel 82.

Through the cooperation structure of foaming extruder head 22 and outer tube extruder head 11, when can realizing that inner tube 1101 passes, carry out the packing of the parcel of outer tube 1104 cover and polyurethane heat preservation 1103, let inner tube 1101, polyurethane heat preservation 1103 and outer tube 1104 synchronous in a section regional shaping, it is more high-efficient, and make the wholeness higher after the tubular product shaping.

Through the grooving mechanism 4 and the winding mechanism 8, continuous grooving pretreatment and winding of the thermal insulation layer 1105 can be performed in the front and rear region sections formed by the inner pipe 1101, the polyurethane thermal insulation layer 1103 and the outer pipe 1104, and the efficiency is higher.

An annular extrusion flow channel is arranged in the side wall of the foaming extruder head 22, polyurethane foaming materials can flow in the extrusion flow channel, a ring cover 21 is rotatably sleeved outside the foaming extruder head 22, a sealing ring is arranged at the rotating connection position of the ring cover 21 and the foaming extruder head 22 to enable the ring cover and the foaming extruder head 22 to be in sealing connection, the inner cavity of the ring cover 21 is communicated with the extrusion flow channel, a polyurethane foaming extruder 2 is fixedly connected to one side of the ring cover 21, the polyurethane foaming extruder 2 comprises a cylinder body, a screw rod and a motor, and the motor drives the screw rod to rotate in the cylinder body; the polyurethane foaming extruder 2 can push and extrude the material into the foaming extruder head 22, and then the material is discharged from an opening at one side of an extrusion flow channel on the foaming extruder head 22, so that the foaming material can be uniformly filled between the inner pipe 1101 and the outer pipe 1104, the polyurethane foaming extruder 2 is rotatably communicated with the foaming extruder head 22 through the ring cover 21, the foaming extruder head 22 can extrude the foaming material in the rotating process, the polyurethane foaming material is more uniformly filled between the inner pipe 1101 and the outer pipe 1104, the adhesion between the polyurethane foaming material and the inner pipe 1101 and the outer pipe 1104 is more uniform and stable, and the polyurethane foaming material is prevented from being separated from the inner pipe 1101 and the outer pipe 1104;

an annular extrusion flow channel is arranged in the side wall of the outer pipe extruder head 11, the extrusion flow channel can extrude a plastic outer pipe, the outlet position of the extrusion flow channel on the outer pipe extruder head 11 corresponds to the outlet position of the extrusion flow channel on the foaming extruder head 22, and one side of the outer pipe extruder head 11 is fixedly connected with an outer pipe extruder 1; outer tube extruder 1 is the same with polyurethane foaming extruder 2's structure, it can promote the extrusion with plastic material, shear the mixture simultaneously, let the material get into in outer tube extruder head 11, extrude from one side opening part of outer tube extruder head 11 on the runner at last, make the outer tube shaping, simultaneously because outer tube extruder head 11 overlaps outside foaming extruder head 22, make outer tube 1104 can be with polyurethane foaming material synchronous forming in the shaping process, outer tube 1104 just has been extruded, it is stable not yet to solidify, the molecule is in relative activity state, polyurethane foaming material fills in outer tube 1104 under this state, let outer tube 1104 more firm with polyurethane foaming material's coagulation after the cooling solidifies.

The outer wall of the foaming extruder head 22 is rotatably connected with a ring seat 12, the ring seat 12 consists of an annular ring and an underframe, the annular ring is sleeved outside the foaming extruder head 22 and is rotatably connected with the foaming extruder head 22 through a bearing, the rotary support of the foaming extruder head 22 can be improved, the foaming extruder head 22 can rotate more stably and smoothly, the outer wall of the foaming extruder head 22 is connected with a rotating mechanism 3, the rotating mechanism 3 comprises a toothed ring 32, the toothed ring 32 is fixedly sleeved outside the foaming extruder head 22, one side of the toothed ring 32 is meshed and connected with a rotating gear 33, and one side of the rotating gear 33 is connected with a rotation control motor 31; the rotation control motor 31 can drive the gear ring 32 to rotate through the rotating gear 33, and then drive the foaming extruder head 22 to rotate, so that the foaming extruder head 22 can stably extrude the polyurethane foam material in a rotating state.

A first inner gear ring 46 is fixedly arranged on the inner wall of the first rotating ring 44, the inner side of the first inner gear ring 46 is meshed and connected with a first rotating ring driving gear 47, one side of the first rotating ring driving gear 47 is connected with a first rotating ring control motor 48, the first rotating ring control motor 48 is fixedly arranged on a first supporting ring 45, one side of the first supporting ring 45 is rotatably connected with the first rotating ring 44, one side of the cutter head 41 is connected with a cutter head motor 43, the cutter head motor 43 is fixed on the supporting arm 42, one end, far away from the cutter head 41, of the supporting arm 42 is rotatably connected with one end of a push-pull cylinder 49, the push-pull cylinder 49 can be a hydraulic cylinder or an air cylinder, the push-pull cylinder 49 is communicated with an air source through a rotary joint, the other end of the push-pull cylinder 49 is rotatably connected with the first rotating ring 44, the push-pull cylinder 49 is rotatably connected with the first rotating ring 44 through a pin shaft, and the middle part of the supporting arm 42 is rotatably connected with the first rotating ring 44; the cutter motor 43 can drive the cutter 41 to rotate at a high speed, the push-pull cylinder 49 can push and pull one end of the support arm 42 through telescopic motion, the other end of the control support arm 42 is close to or separated from the inner pipe 1101, when the other end of the control support arm 42 is close to the inner pipe 1101, the cutter 41 rotating at a high speed can cut a concave groove in the outer wall of the inner pipe 1101, and the cutting depth of the cutter 41 can be adjusted through the distance change between the other end of the control support arm 42 and the inner pipe 1101.

The groove carving mechanism 4 is externally sleeved with a cleaning box 6, round holes are symmetrically formed in two sides of the cleaning box 6, rubber ring pieces 66 are arranged in the round holes, the rubber ring pieces 66 are connected with the side wall of the cleaning box 6 through screws, and the rubber ring pieces 66 are of a waveform structure; the inner pipe 1101 can penetrate through the cleaning box 6, so that the grooving process of the inner pipe 1101 is carried out in the cleaning box 6, the noise can be reduced, and the flying dust generated in the grooving process can be inhibited from floating;

an air delivery ring pipe 64 is arranged in the cleaning box 6, the air delivery ring pipe 64 is positioned on one side of the first rotating ring 44 close to the foaming extruder head 22, the inner wall of the air delivery ring pipe 64 is uniformly provided with air nozzles 65 in a surrounding manner, one side of the air delivery ring pipe 64 is communicated with an outlet of a high-pressure fan 61, and the high-pressure fan 61 is positioned outside the cleaning box 6; the inner pipe 1101 can penetrate through the gas transmission ring pipe 64, the gas spraying head 65 on the inner wall of the gas transmission ring pipe 64 can uniformly and stably spray gas flow to the inner pipe 1101 under the gas supply of the high-pressure fan 61, and dust attached to the outer wall of the inner pipe 1101 is cleaned;

one side of the cleaning box 6 is communicated with an inlet of an air suction fan 62, an outlet of the air suction fan 62 is communicated with an inlet of a dust filtering box 63, the air suction fan 62 can be a centrifugal fan, and the dust filtering box 63 can be a cloth bag type filter box; the air suction fan 62 sucks the dust blown down by the air nozzle 65 in the cleaning box 6 and then conveys the dust into the dust filtering box 63, so that the environment-friendly emission is realized.

A circular hole at one side of the cleaning box 6 close to the foaming extruder head 22 is communicated with one side of the spray box 5, two sections of spaces are arranged in the spray box 5, an oil delivery ring pipe 55 is arranged in one section of the two sections of spaces close to the cleaning box 6, atomizing nozzles 56 are uniformly arranged on the inner wall of the oil delivery ring pipe 55 in a surrounding manner, and one side of the oil delivery ring pipe 55 is connected with an oil box 53 through a high-pressure pump 54; the high-pressure pump 54 can convey the anticorrosive paint in the oil tank 53 to the oil delivery ring pipe 55, and then the anticorrosive paint is uniformly sprayed on the outer wall of the inner pipe 1101 through the atomizing nozzle 56;

the other section of space of spray box 5 is communicated with one end of air pipe 51, and the other end of air pipe 51 is connected with the export of air heater 52, and air heater 52 can dry fast the anticorrosive paint on the outer wall of inner tube 1101.

A second inner gear ring 84 is arranged on the inner wall of the second rotating ring 82, the inner side of the second inner gear ring 84 is connected with a second rotating ring driving gear 85 in a meshing manner, one side of the second rotating ring driving gear 85 is connected with a second rotating ring control motor 86, the second rotating ring control motor 86 is fixedly arranged on a second supporting ring 83, the second supporting ring 83 is fixed on the ground as a support, and one side of the second supporting ring 83 is rotatably connected with the second rotating ring 82; the second rotating ring control motor 86 drives the inner gear ring 84 to rotate through the second rotating ring driving gear 85, so as to drive the second rotating ring 82 to rotate, the rotating drum 81 on one side of the second rotating ring 82 can rotate around the composite pipe, the heat insulation layer 1105 can be conveniently wound outside the composite pipe, the winding of the heat insulation layer 1105 can not only compact and shape the outer pipe 1104 which is just extruded, promote the tightness of the connection between the outer pipe 1104 and the polyurethane heat insulation layer 1103, but also form a layer of protection on the outer side of the outer pipe 1104;

a supporting rod 89 is fixed on the inner side of the second inner toothed ring 84, a fixed clamping wheel 88 is arranged on one side of the supporting rod 89, an elastic clamping wheel 87 is arranged on one side of the fixed clamping wheel 88 in an aligning manner, one end of the elastic clamping wheel 87 is connected with a sliding rod 810, the sliding rod 810 is connected with the supporting rod 89 in a sliding manner, and a tension spring 811 is connected between the sliding rod 810 and the supporting rod 89; the belt body of the thermal insulation layer 1105 can be arranged between the elastic clamping wheel 87 and the fixed clamping wheel 88 in a penetrating way, and the thermal insulation layer 1105 can keep a tight state in the spiral winding process by the clamping of the elastic clamping wheel 87 and the fixed clamping wheel 88, so as to prevent loosening.

A pipe traction machine 9 and a pipe conveying mechanism 7 are respectively arranged on one sides of the winding mechanism 8 and the notching mechanism 4, which are far away from the foaming extruder head 22, the pipe traction machine 9 comprises a traction roller 91, and one end of the traction roller 91 penetrates through a second vertical frame 93 to be connected with a traction motor 92; the traction motor 92 can drive the traction roller 91 to rotate, so that the pipe can be pulled and dragged;

the pipe conveying mechanism 7 comprises a pipe conveying roller 73, and one end of the pipe conveying roller 73 is connected with a pipe conveying motor 71 through a first vertical frame 72; the pipe conveying motor 71 can drive the pipe conveying roller 73 to rotate, the inner pipe 1101 is erected on the pipe conveying roller 73, and the rotating pipe conveying roller 73 can convey the inner pipe 1101;

a cooling spray head 10 is arranged between the pipe tractor 9 and the winding mechanism 8, the inlet end of the cooling spray head 10 is connected with a cooling water pipe, cooling water is pumped, and the outer wall of the cooling spray head 10 is connected with a ring frame 101; the cooling nozzle 10 is arranged in front of the pipe tractor 9, so that the outer pipe 1104 and the polyurethane insulating layer 1103 can be in contact with the traction roller 91 of the pipe tractor 9 after being cooled and solidified, and the pipes are prevented from being dragged and twisted.

The working principle is as follows: the inner tube 1101 is erected on a tube feeding roller 73 of the tube feeding mechanism 7, and the tube feeding roller 73 is driven by a tube feeding motor 71 to rotate to push the inner tube 1101 to penetrate through the middle of a first rotating ring 44 of the notching mechanism 4;

the cutter motor 43 drives the cutter 41 to rotate at a high speed, the push-pull cylinder 49 can push and pull one end of the support arm 42 through telescopic motion, the other end of the control support arm 42 is close to or separated from the inner pipe 1101, when the other end of the control support arm 42 is close to the inner pipe 1101, the cutter 41 rotating at the high speed can cut a concave groove on the outer wall of the inner pipe 1101, the cutting depth of the cutter 41 can be adjusted through the change of the distance between the other end of the control support arm 42 and the inner pipe 1101, and meanwhile, under the continuous pushing of the pipe conveying roller 73, the rotating cutter 41 can cut continuous grooves on the outer wall of the inner pipe 1101;

after grooving is completed, the inner pipe 1101 can penetrate through the gas transmission ring pipe 64, the gas jet head 65 on the inner wall of the gas transmission ring pipe 64 can uniformly and stably jet gas flow to the inner pipe 1101 under the gas supply of the high-pressure fan 61 to clean dust attached to the outer wall of the inner pipe 1101, and the gas suction fan 62 can suck the dust blown down by the gas jet head 65 in the cleaning box 6 and then convey the dust into the dust filtering box 63 to realize environment-friendly discharge;

the inner pipe 1101 continues to move towards the foaming extruder head 22, the high-pressure pump 54 can convey the anticorrosive paint in the oil tank 53 to the oil delivery ring pipe 55, then the anticorrosive paint is uniformly sprayed on the outer wall of the inner pipe 1101 through the atomizing nozzle 56, then the air pipe 51 in the other section of space of the atomizing tank 5 is connected with the outlet of the hot air blower 52, and the anticorrosive paint on the outer wall of the inner pipe 1101 can be quickly dried by blowing;

then the inner pipe 1101 is moved to penetrate into the foaming extruder head 22, when the inner pipe 1101 penetrates out from the left end of the foaming extruder head 22, the polyurethane foaming extruder 2 and the outer pipe extruder 1 are started, the polyurethane foaming extruder 2 can push and extrude the material into the foaming extruder head 22, and then the material is discharged from an opening at one side of an extrusion flow channel on the foaming extruder head 22, so that the foaming material can be uniformly filled between the inner pipe 1101 and the outer pipe 1104, the polyurethane foaming extruder 2 is rotatably communicated with the foaming extruder head 22 through the ring cover 21, the foaming extruder head 22 can extrude the foaming material in the rotating process, the polyurethane foaming material is more uniformly filled between the inner pipe 1101 and the outer pipe 1104, the adhesion between the polyurethane foaming material and the inner pipe 1101 and the outer pipe 1104 is more uniform and stable, and the polyurethane foaming material is prevented from being separated from the inner pipe 1101 and the outer pipe 1104;

meanwhile, the outer pipe extruder 1 and the polyurethane foaming extruder 2 have the same structure, can push and extrude plastic materials, shear and mix the plastic materials, allow the plastic materials of the outer pipe 1104 to enter the outer pipe extruder head 11, and finally extrude the plastic materials from the opening at one side of the extrusion channel on the outer pipe extruder head 11, so that the outer pipe 1104 is molded, and simultaneously, the outer pipe extruder head 11 is sleeved outside the foaming extruder head 22, so that the outer pipe 1104 can be molded synchronously with the polyurethane foaming materials in the molding process, and when the outer pipe 1104 is just extruded, the outer pipe 1104 is not solidified and stable, and molecules are in a relatively active state, and the polyurethane foaming materials are filled in the outer pipe 1104 in the state, so that the outer pipe 1104 is more stably coagulated with the polyurethane foaming materials after being cooled and solidified;

after the inner pipe 101, the polyurethane heat-insulating layer 1103 and the outer pipe 1104 are molded, the molded inner pipe 101, the molded polyurethane heat-insulating layer 1104 and the molded outer pipe 1104 move leftwards together and enter the second rotating ring 82 of the winding mechanism 8, the second rotating ring control motor 86 drives the inner gear ring 84 to rotate through the second rotating ring driving gear 85, and further drives the second rotating ring 82 to rotate, so that the rotating drum 81 on one side of the second rotating ring 82 can rotate around the composite pipe, the heat-insulating layer 1105 can be conveniently wound outside the composite pipe, the winding of the heat-insulating layer 1105 can not only compact and shape the outer pipe 1104 which is just extruded out, and promote the tightness of the connection between the outer pipe 1104 and the polyurethane heat-insulating layer 1103, but also form a layer of protection on the outer side of the outer pipe 1104;

and then, the cooling water flows out of the cooling spray head 10 to the outside of the composite pipe, so that the composite pipe is cooled, solidified and shaped, and finally reaches the traction roller 91 of the pipe tractor 9, and the traction roller 91 is driven by the traction motor 92 to rotate, so that the formed composite pipe can be pulled out.

The previous description is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Polyurethane heat preservation composite pipe, including inner tube (1101), its characterized in that: evenly cover on inner tube (1101) outer wall has anticorrosive coating (1102), and inner tube (1101) overcoat is equipped with outer tube (1104), and it has polyurethane heat preservation (1103) to fill between anticorrosive coating (1102) on outer tube (1104) and inner tube (1101) to outer tube (1104) is gone up the package and is equipped with insulating layer (1105).

2. The polyurethane thermal composite pipe according to claim 1, wherein: the outer wall of the inner pipe (1101) is uniformly provided with concave grooves;

the heat insulation layer (1105) is uniformly and spirally wound on the outer wall of the outer pipe (1104).

3. The forming device of the polyurethane thermal insulation composite pipe according to any one of claims 1 to 2, characterized in that: including foaming extruder head (22), the centre of foaming extruder head (22) is equipped with and extrudes aircraft nose (11) with inner tube (1101) diameter assorted round hole, and the foaming extruder head (22) is outer to be rotated the cover and is equipped with outer tube extruder head (11), tail end one side of foaming extruder head (22) is provided with spray box (5), and one side that foaming extruder head (22) were kept away from in spray box (5) is provided with grooving mechanism (4), and grooving mechanism (4) include first change (44), and one side of first change (44) is connected with blade disc (41) through support arm (42), head end one side of foaming extruder head (22) is provided with winding mechanism (8), and winding mechanism (8) include second change (82), and one side of second change (82) is provided with rotary drum (81).

4. The forming device of the polyurethane thermal insulation composite pipe according to claim 3, characterized in that: an annular extrusion flow channel is arranged in the side wall of the foaming extruder head (22), a ring cover (21) is rotatably sleeved outside the foaming extruder head (22), the inner cavity of the ring cover (21) is communicated with the extrusion flow channel, and a polyurethane foaming extruder (2) is fixedly connected to one side of the ring cover (21);

an annular extrusion flow channel is arranged in the side wall of the outer pipe extrusion machine head (11), the outlet position of the extrusion flow channel on the outer pipe extrusion machine head (11) corresponds to the outlet position of the extrusion flow channel on the foaming extrusion machine head (22), and an outer pipe extruder (1) is fixedly connected to one side of the outer pipe extrusion machine head (11).

5. The forming device of the polyurethane thermal insulation composite pipe according to claim 3, characterized in that: the outer wall of foaming extruder head (22) rotates and is connected with ring seat (12), and the outer wall of foaming extruder head (22) is connected with rotary mechanism (3), and rotary mechanism (3) include ring gear (32), and outside foaming extruder head (22) was located to fixed cover of ring gear (32), and one side meshing of ring gear (32) is connected with rotary gear (33), and one side of rotary gear (33) is connected with rotation control motor (31).

6. The forming device of the polyurethane thermal insulation composite pipe according to claim 3, characterized in that: the fixed first interior ring gear (46) that is provided with on the inner wall of first change ring (44), the inboard meshing of first interior ring gear (46) is connected with first change ring drive gear (47), and one side of first change ring drive gear (47) is connected with first change ring control motor (48), and first change ring control motor (48) fixed mounting is on first support ring (45), and one side and first change ring (44) of first support ring (45) rotate and are connected, one side of blade disc (41) is connected with blade disc motor (43), and support arm (42) keep away from the one end rotation of blade disc (41) and be connected with the one end of push-and-pull jar (49), and the other end and first change ring (44) of push-and-pull jar (49) rotate and be connected, the middle part and first change ring (44) of support arm (42) rotate and be connected.

7. The forming device of the polyurethane thermal insulation composite pipe according to claim 3, characterized in that: a cleaning box (6) is sleeved outside the notching mechanism (4), round holes are symmetrically formed in two sides of the cleaning box (6), rubber ring sheets (66) are arranged in the round holes, and the rubber ring sheets (66) are of a waveform structure;

an air conveying ring pipe (64) is arranged in the cleaning box (6), the air conveying ring pipe (64) is positioned on one side, close to the foaming extruder head (22), of the first rotating ring (44), air spraying heads (65) are uniformly arranged on the inner wall of the air conveying ring pipe (64) in a surrounding mode, one side of the air conveying ring pipe (64) is communicated with an outlet of a high-pressure fan (61), and the high-pressure fan (61) is positioned outside the cleaning box (6);

one side of the cleaning box (6) is communicated with an inlet of an air suction fan (62), and an outlet of the air suction fan (62) is communicated with an inlet of a dust filtering box (63).

8. The forming device of the polyurethane thermal insulation composite pipe according to claim 6, characterized in that: a round hole on one side, close to the foaming extruder head (22), of the cleaning box (6) is communicated with one side of the spray box (5), two sections of spaces are arranged in the spray box (5), an oil conveying ring pipe (55) is arranged in one section of space, close to the cleaning box (6), of the two sections of spaces, atomizing nozzles (56) are uniformly arranged on the inner wall of the oil conveying ring pipe (55) in a surrounding mode, and one side of the oil conveying ring pipe (55) is connected with an oil box (53) through a high-pressure pump (54);

the other section of the space of the spray box (5) is communicated with one end of an air pipe (51), and the other end of the air pipe (51) is connected with an outlet of a hot air blower (52).

9. The forming device of the polyurethane thermal insulation composite pipe according to claim 3, characterized in that: a second inner gear ring (84) is arranged on the inner wall of the second rotating ring (82), the inner side of the second inner gear ring (84) is connected with a second rotating ring driving gear (85) in a meshed mode, one side of the second rotating ring driving gear (85) is connected with a second rotating ring control motor (86), the second rotating ring control motor (86) is fixedly installed on a second supporting ring (83), and one side of the second supporting ring (83) is rotatably connected with the second rotating ring (82);

a supporting rod (89) is fixed on the inner side of the second inner gear ring (84), a fixed clamping wheel (88) is arranged on one side of the supporting rod (89), an elastic clamping wheel (87) is arranged on one side of the fixed clamping wheel (88) in an aligned mode, one end of the elastic clamping wheel (87) is connected with a sliding rod (810), the sliding rod (810) is connected with the supporting rod (89) in a sliding mode, and a stretching spring (811) is connected between the sliding rod (810) and the supporting rod (89).

10. The forming device of the polyurethane thermal insulation composite pipe according to claim 3, characterized in that: a pipe traction machine (9) and a pipe delivery mechanism (7) are respectively arranged on one sides of the winding mechanism (8) and the notching mechanism (4) far away from the foaming extruder head (22), the pipe traction machine (9) comprises a traction roller (91), and one end of the traction roller (91) penetrates through a second vertical frame (93) and is connected with a traction motor (92);

the pipe conveying mechanism (7) comprises a pipe conveying roller (73), and one end of the pipe conveying roller (73) penetrates through the first vertical frame (72) to be connected with a pipe conveying motor (71);

a cooling spray head (10) is arranged between the pipe tractor (9) and the winding mechanism (8), and the outer wall of the cooling spray head (10) is connected with a ring frame (101).