CN209229163U - A kind of outer plastic-coated lining plastic metal composite pipe - Google Patents

Abstract

A kind of outer plastic-coated lining plastic metal composite pipe, including metal tube, outer plastic layer and interior plastic composite pipe layer, the interior plastic composite pipe layer is made of hot melt adhesive layer and plastic tube, and the plastic tube is located at outer surface of metal pipe by hot melt adhesive layer and metal tube cementation, the outer plastic layer.Utilize the utility model, the defect of existing cement mortar liner metal tube, epoxy resin, epoxy ceramic coating metal pipe and polyurethane coating metal tube can be overcome, it is current optimal pipe material product suitable for fields such as water supply, combustion gas, draining, blowdown, heating.

Description

A kind of outer plastic-coated lining plastic metal composite pipe

Technical field

The utility model relates to a kind of outer plastic-coated lining plastic metal composite pipes.

Background technique

Existing common steel tube and cast iron pipe are often used as water supply aqueduct because of its preferable comprehensive performance, in order to solve Steel pipe, cast iron pipe Anticorrosion, most common method are in steel pipe uses for 8710 coating, and outer is three oily two cloth, not only anti-corrosion Effect is bad, and connection type is inconvenient.And the most common method of cast iron pipe is that cement mortar liner or epoxy are used in pipe Resin, epoxy ceramic, the preferred anti-corrosion mode that polyurethane coating is such pipeline.Use cement mortar liner defeated as drinking water Waterpipe, since inner wall is rough, resistance to water-flow is big, and easy fouling, and the reactive material that hardening of cement generates influences water quality, liner Thickness is larger, reaches 3-12mm, and emptying effectiveness is lower, and cement lining causes entire tube body weight to increase, and is unfavorable for construction and installation, And cement lining processing is inconvenient, poor adhesive force, and impact and pipe deformations during construction and installation be easy to cause cement de- It falls, cement lining remains many difficult points to be resolved, so the liner mode that cement lining has not been.It is applied using epoxy resin Layer liner, fall off since liner layer easily be layered, material cost is high, the harmful substance of Curing Process of Epoxy generation to water quality and The influence of human health is difficult to be widely applied, using epoxy ceramic coating liner, although having very high adhesive force and bright and clean Degree, but manufacture difficulty is big, the device is complicated, and it is at high cost, it is only used for particularity engineering, is unable to get commonly used.Using poly- ammonia Ester coating liner, high to spheroidal graphite cast-iron pipe internal surface flatness requirement, production efficiency is low, manufacturing cost and material cost pole Height can not be widely applied.

Utility model content

Technical problem to be solved by the utility model is to provide one kind to be easy to make, at low cost, good mechanical property, defends Raw environmental protection, corrosion resistance is good, long service life, inner wall smooth, small flow resistance, emptying effectiveness is high, low energy consumption, liner attachment Power is high, environmental suitability is strong, and cost performance is high and is easy to the outer plastic-coated lining plastic metal composite pipe of promotion and popularization.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of outer plastic-coated lining plastic metal composite pipe, including metal tube, outer plastic layer and interior plastic composite pipe layer, it is described interior Plastic composite pipe layer is made of hot melt adhesive layer and plastic tube, and the plastic tube is described outer by hot melt adhesive layer and metal tube cementation Layer plastics are located at outer surface of metal pipe.

Further, the metal tube can be spigot-and-socket metal tube, such as spigot-and-socket ductile iron pipe, or non-socket joint Formula metal tube.

Further, the both ends of the interior plastic composite pipe layer are respectively equipped with embedded enhancing ring, the embedded enhancing ring One end have flange, the flange is close to the end of metal tube.The embedded enhancing ring expanded joint enhances ring in plastic tube The salient point of outer surface is embedded into plastic tube, and plastic tube generates certain deformation.The salient point of the embedded enhancing ring appearance is embedding Enter into plastic tube.It is 0.1-1.0mm that the plastic tube, which generates deformation quantity,.The material of the embedded enhancing ring can be stainless steel Deng.

Further, the flange height of the embedded enhancing ring is higher than the compound tube layer of inner plastic (preferably and outside metal tube Wall is concordant), it is described it is embedded enhancing ring with a thickness of 1-3mm, width 10-100mm.

Further, the appearance of the embedded enhancing ring is equipped with salient point.

Further, the salient point is formed through annular knurl or spot welding, and the height of the salient point is 0.1-2.0mm.

Further, the outer plastic layer can be polyethylene, polyvinyl chloride, polypropylene, polyurethane or other macromolecule materials Material.The outer plastic layer with a thickness of 0.2mm-2.0mm.

The manufacturing method of the outer plastic-coated lining plastic metal composite pipe, is: first making compound plastic pipe, then by metal Inside pipe wall carries out sandblasting, shot-peening or Shot Blasting after polishing, then compound plastic pipe is pulled in the metal tube handled well, will The sealing of compound plastic pipe both ends, inflation, after heat treatment, metal tube appearance plastic-spraying or plastic-coated are cooling, and metal tube and plastics are multiple Close tubing cementation, realize that outer plastic-spraying or plastic-coated, lining plastic are online simultaneously and complete, can also outer plastic-spraying or plastic-coated, lining plastic separately into Row.

Further, compound plastic pipe is pulled in the metal tube handled well, is placed on bushing pipe machine, by compound plastic pipe Both ends sealing, inflation, are heated by the induction heating circle that moving trolley passes through bushing pipe platform or induction heating circle is small by movement Vehicle is heated across tubing, and plastic-blasting device is arranged along the direction front end that tubing passes through induction heating circle, carries out after metal tube heating outer Table plastic-spraying or plastic-coated are realized that outer plastic-spraying or plastic-coated, lining plastic are online simultaneously and are completed.

Further, the described induction heating circle heating can be low frequency, intermediate frequency, high frequency or superaudio induction heating, preferably in Frequency induction heating.

Further, the manufacturing method of the outer plastic-coated lining plastic metal composite pipe, specifically includes the following steps:

A, plastic resin and hot melt adhesive make compound plastic pipe

1) plastic resin, hot melt adhesive are dried；

2) co-extrusion squeezes out or hot melt adhesive applies on the plastic tube outside；

3) Vacuum shaping；

4) cooling；

5) it draws；

6) fixed length cutting；

B, inner wall of metal tube is handled

7) inner wall is polished；

8) sandblasting, shot-peening or ball blast；

C, trombone slide

9) clamp；

10) it pulls in；

D, outer plastic-spraying or plastic-coated, lining plastic

11) it seals；

12) it inflates；

13) it heats；

14) plastic-spraying or plastic-coated, lining plastic；

15) cooling.

Further, in order to improve the quality and production efficiency of outer plastic-coated lining plastic metal composite pipe, energy consumption and production are reduced Cost, further step are:

In step 2, co-extrusion extruding and hot melting glue-line or the thickness 0.2-0.5mm for applying hot melt adhesive layer outside.

In step 12), inner gas pressure 0.1-0.6MPa.

In step 13), heating temperature: away within pipe end 300mm be 200 DEG C ± 5 DEG C, away from pipe end 300mm with Outer is 185 DEG C ± 5 DEG C.

In step 13), by the variation of temperature automatically adjust heating power or tubing and heating coil relative moving speed with Control heating temperature.

It further, further include the production and the embedded installation for enhancing ring of embedded enhancing ring.

The production of the embedded enhancing ring, the specific steps are as follows:

1) stainless steel band length is cut；

2) edge rolling, flange；

3) it welds；

4) weld grinding.

If the appearance of embedded enhancing ring is equipped with salient point, further includes: 5) annular knurl or spot welding.

The outer diameter of the embedded enhancing ring is 0.6-2.5mm smaller than the internal diameter of interior plastic composite pipe layer.

The installation of the embedded enhancing ring, the specific steps are as follows:

1) embedded enhancing ring is inserted into pipe end；

2) tensioner ring.

Pressure by setting expanding equipment or pipe expanding equipment completes the installation of embedded enhancing ring.

Die deformation amount by setting expanding equipment or pipe expanding equipment completes the installation of embedded enhancing ring.

The manufacturing method of plastic-coated lining plastic metal composite pipe except the utility model, it includes that online production internal layer is modeling Material, the compound plastic pipe that outer layer is hot melt adhesive；Inner wall of metal tube carries out at sandblasting, shot-peening or ball blast again after the processing of interior mill Reason；Compound plastic pipe is pulled in the metal tube handled well, then is placed in the sealing of pipe both ends, inflation on bushing pipe machine, shifting is passed through Dynamic trolley passes through the induction heating circle heating of bushing pipe platform or induction heating circle is heated by moving trolley across tubing, or heating Device is heated by moving trolley across tubing, and the direction front end setting plastic-spraying or plastic-coated dress of induction heating circle are passed through along tubing It sets, carries out appearance plastic-spraying or plastic-coated, lining plastic, water-spraying control after metal tube heating.It can overcome existing cement mortar liner ball Inner wall existing for graphite cast iron pipe is rough, and resistance to water-flow is big, easy fouling, and the harmful substance that hardening of cement process generates influences water Matter, thickness of inner lining is big, and emptying effectiveness is low, and tubing is hit, deforms the defects of cement is easy to fall off；Also it can overcome existing epoxy resin Coating, epoxy ceramic coating and polyurethane coating liner metal tube cost of manufacture are high, and production efficiency is low, are easily layered, epoxy resin Solidification process influences the defects of water quality and worker health, while the anti-corrosion effect for overcoming outer spray paint and bituminous epoxy paint is poor, The problem of to water pollution once again.

Compared with prior art, the utility model has the following characteristics that

(1) the compound technical solution carried out simultaneously with appearance plastic-spraying of the inner wall bushing pipe that the utility model uses, plastic-spraying or painting For modeling technique raw material without adding solvent, production process does not generate toxic, pernicious gas, can avoid bituminous epoxy paint spraying and causes Environmental pollution and influence worker health safety problem.

(2) the compound technical solution carried out simultaneously with appearance plastic-spraying or plastic-coated of the inner wall bushing pipe that the utility model uses, can Appearance plastic-spraying or plastic-coated are carried out using bushing pipe compound tense tubing temperature, plastic-spraying, plastic-coated is gone again without carrying out reheating, saves again Secondary heating energy consumption, production process simplify, and production efficiency greatly improves.

(3) technical solution of the outer plastic-coated that the utility model uses or plastic-spraying, tubing appearance anti-corrosion are imitated compared to paint spraying Fruit is more preferable, and the service life is longer for tubing.

(4) technical solution of the outer plastic-coated that the utility model uses or plastic-spraying, is avoided that spigot-and-socket ball compared to paint spraying Secondary pollution of the graphite cast iron pipe jack part to water.

(5) the utility model uses the technical solution of metal tube and compound plastic pipe entirety cementation, makes metal tube liner Thickness reduces, and internal diameter increases, and water passing capacity and emptying effectiveness greatly improve, while achieving the effect that energy-saving, and liner is modeling Expects pipe, the cost of material is low.

(6) the utility model uses the technical solution of metal tube and compound plastic pipe entirety cementation, becomes metal pipe-wall Smooth and non-scaling is obtained, small flow resistance, pipeline comprehensive energy consumption and operating cost substantially reduce.

(7) the utility model uses the technical solution of metal tube and compound plastic pipe entirety cementation, and plastic lining can hinder The contact of water proof and metal tube tube wall prevents the secondary pollution of water quality during water delivery, and water quality is made to become much cleaner health.

(8) the utility model uses the technical solution of metal tube and compound plastic pipe entirety cementation, keeps metal tube Good mechanical performance itself, inner lining plastic tube greatly improve pipeline corrosion resistance and service life.

(9) the utility model uses the technical solution of metal tube and compound plastic pipe entirety cementation, and internal layer is polyethylene Pipe, good toughness, ectonexine are bonded using hot melt adhesive, are greatly improved the adhesive force of cast iron pipe Yu lined with polyethylene pipe, solve it Liner mode liner layer is easy to crack for he, the problem of being layered, falling off, and construction is made to become convenient, fast, simple.

(10) the utility model keeps inner wall of metal tube more smooth, then pass through using polishing inner wall of metal tube Sandblasting, shot-peening or ball blast technique processing, can greatly improve the bonding quality of metal tube and hot melt adhesive layer, inner lining plastic tube, make Production tube is more smooth, and resistance to water-flow can be smaller, and the comprehensive energy consumption and operating cost of pipeline can be even lower.

(11) the utility model is suitable for the production of heavy caliber pipe (prior art is adapted to bore 500mm only with down tube Material, the utility model are adaptable to the above tubing of bore 2600mm), while equipment simple and flexible is suitable for factory lines, big Batch production, high production efficiency, production cost is low, greatly improves the outer plastic-coated lining plastic metal tube market competitiveness.

(12) preferably, the utility model automatically adjusts heating power by the variation of heating temperature or passes through tubing and add Gas ket relative moving speed come reach temperature heating stability, keep each position heating temperature of tubing uniform, to make metal tube With hot melt adhesive layer and plastic tube bonding plane without leak source, stable product quality, one-pass molding qualification rate is high, and energy conservation and environmental protection.

(13) further, the embedded enhancing ring of the utility model uses the structure with flange, when enhancing ring installation, both It is convenient and efficient, and it is beneficial to the positioning of ring, it can avoid caused by being contacted when expanding machine or the insertion of pipe-expanding device mold with enhancing ring It is mobile to enhance ring position.

(14) further, the embedded enhancing ring of the utility model uses the structure with flange, can be to inner lining plastic tube gold Belong to end surfaces to be coated, has not only been beneficial to tube end face anti-corrosion, but also avoid plastic lining end surfaces exposed, has made plastic lining pipe end The appearance of inner lining plastic tube spigot-and-socket ductile iron pipe can be improved outside being not exposed in the open defects such as the flash generated after the deburring of face Performance.

(15) further, inner lining plastic tube metal tube is stacked at outdoor, the metal of both ends of the surface using time length or for a long time Layer can generate certain corrosion, cause the plastic layer of tubing both ends of the surface and metal layer gradually peeling-off, while the lining plastic bed of material It shrinks, the area for causing plastic layer to be removed with metal layer is increasing, and plastic layer may finally be caused in the effect of waterpower Lower flange blocks pipeline, influences pipeline normal water supply, after plastic layer and metal layer generate layering, metal directly contacts generation with water Corrosion seriously affects water quality generation, using embedded enhancing ring, can solve plastic layer and metal layer lamination problem completely.

(16) further, the utility model increases the technical side of embedded enhancing ring using inner lining plastic tube metal pipe end opening Case is beneficial to improve the intensity of inner lining plastic tube metal pipe end opening, can preferably avoid tubing in handling, transport, installation process The case where being squeezed and deformed by external force.

(17) further, the utility model increases the technical side of embedded enhancing ring using inner lining plastic tube metal pipe end opening Case can reduce the usage amount of inner lining plastic tube hot melt adhesive, can save material, reduce cost.

(18) further, in inner lining plastic tube metal tube production process because various problems existing for metal pipe end opening itself compared with More, in addition technique controlling difficulty is big, a small amount of lamination inevitably occurs for part tubing both ends, not only influences outside tubing See, and tubing after a period of use can occurrence of large-area layering, block pipeline, pollute water quality；But if by the part Tubing is scrapped, and will lead to the entire inner lining plastic tube metal pipe end opening increase insertion that increased production cost, and the utility model uses Formula enhances the technical solution of ring, can be fully solved layering and the appearance quality of the part tubing use process, reduces liner Plastic tube metal tube production process is scrapped, and inner lining plastic tube metal tube entirety production cost is reduced.

(19) further, the embedded enhancing ring of use, appearance form the surface for having salient point through annular knurl or spot welding, can be big The big conjugation for improving enhancing ring and inner lining plastic tube is avoided that enhancing ring by suspension hook in the handling of inner lining plastic tube metal tube The influence for hanging power occurs position movement or even falls off.

(20) further, inner lining plastic tube metal tube is squeezed by external force during transport, handling, installation etc., impacts meeting Certain elastic deformation occurs, since enhancing ring thickness is small, Yi Fasheng plastic deformation causes enhancing ring to fall off, and the utility model is adopted Embedded enhancing ring, appearance form the surface for having salient point through annular knurl or spot welding, can greatly improve enhancing ring and lining plastic The conjugation of expects pipe can be fully solved the technical problem that enhancing ring falls off.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model embodiment 1；

Fig. 2 is the structural schematic diagram of 1 another embodiment of the utility model embodiment；

Fig. 3 is the structural schematic diagram of the utility model embodiment 2；

Fig. 4 is the structural schematic diagram of 2 another embodiment of the utility model embodiment.

Specific embodiment

The utility model is further described below with reference to embodiment.

Embodiment 1

Referring to Fig.1, a kind of outer plastic-coated lining plastic spheroidal graphite cast-iron multiple tube, including spigot-and-socket ductile iron pipe 1, outer layer plastic 2(polyethylene) and inner plastic composite pipe 3, the inner plastic composite pipe 3 is made of hot melt adhesive layer and plastic tube, described For plastic tube by hot melt adhesive layer and slotting 1 cementation of formula ductile iron pipe, the outer layer plastic 2, which is located at, inserts 1 appearance of formula ductile iron pipe Face.

The inner plastic composite pipe is made online, by outer layer hot melt adhesive layer and inner layer plastic tube (polyethylene) Constitute, polyethylene and hot melt adhesive are dried, and are squeezed out respectively through extruder to co-extruding mould, produce outer layer be hot melt adhesive, it is interior Layer is the double-layer plastic composite pipe of polyethylene, and hot melt adhesive layer compares spheroidal graphite with a thickness of 0.3mm, polyethylene layer with a thickness of 3mm, outer diameter The small 0.5mm of cast iron bore draws machine travel, is cut into length required for bushing pipe composite molding using Vacuum shaping, cooling Degree.

The spigot-and-socket ductile iron pipe inner wall polishes flat through interior grinding machine, then by the ductile iron pipe to polish flat through spraying Sand, shot-peening or ball blast make ductile iron pipe inner wall oxide layer, iron rust remove clean and obtain the frosting of certain roughness.

In order to guarantee that inner lining plastic tube smoothly pulls in ductile iron pipe and facilitate seal head sealed liner plastic tube, will mould Trombone slide machine clamp is inserted in material multiple tube one end, and the ductile iron pipe that inner wall is handled well is placed in trombone slide machine platform, by plastic composite pipe It pulls in ductile iron pipe, plastic composite pipe both ends respectively reserve length required for bushing pipe platform seal head.

In order to guarantee that ductile iron pipe is bonded as one with inner lining plastic tube, tubing is placed in bushing pipe platform running trolley On, the sealed head sealing in plastic tube both ends is filled with compressed air to 0.2MPa, starts running trolley, started by optoelectronic switch Intermediate frequency induction heating device (Medium frequency induction device be existing equipment) heating, heating control system be arranged tubing heating temperature be away from It is 200 DEG C within pipe end 300mm, away from being 185 DEG C other than pipe end 300mm, is added by the variation automatic adjustment of temperature Thermal power or tubing and heating coil relative moving speed make tubing heating temperature meet temperature program(me) and want to control heating temperature It asks, plastic-blasting device is set along the direction heating coil front end that tubing passes through induction heating circle, carries out appearance spray immediately after tubing heating Modeling, plastic-spraying are arranged cooling water ring apart from plastic-blasting device 200mm with a thickness of 0.5mm, along tubing moving direction, carry out after tubing heating Water drenching is cooling, meanwhile, air pressure 5min in tubing is kept, discharging platform is discharged into, carries out deburring with trimmer；Deburring is completed, ink jet numbering machine Carry out coding mark.

The manufacturing method of the outer plastic-coated lining plastic spigot-and-socket ductile iron pipe, specifically includes the following steps:

A, polyethylene and hot melt adhesive make plastic composite pipe

1) polyethylene, hot melt adhesive drying process-dryer；

2) co-extrusion extrusion-extruder, co-extruding mould；

3) Vacuum shaping-calibration sleeve, vacuum tank；

4) cooling-spray water tank；

5) traction-dragger；

6) fixed length cutting-cutting machine；

B, spigot-and-socket ductile iron pipe (including outer wall zinc layers) inner wall processing

7) inner wall polishing-interior grinding machine；

8) sandblasting, shot-peening or ball blast-sand-blasting machine, compressed air shotblasting machine or shot-blasting machine；

C, trombone slide

9) clamp-fixture；

10)-bench is pulled in；

D, outer plastic-spraying or plastic-coated, lining plastic

11) sealing-seal head；

12) inflation-gas tube；

13) heating-intermediate frequency induction heating device, running trolley；

14) appearance plastic-spraying or plastic-coated, lining plastic-plastic-spraying or plastic-coated device, bushing pipe compounding machine；

15) cooling-water ring；

16) deburring-trimmer；

17) mark-ink jet numbering machine；

E, detection, check and accepting storing.

Certainly, spigot-and-socket ductile iron pipe described in the present embodiment 1 can be other spigot-and-socket metal tubes, such as spigot-and-socket steel Pipe etc..The spigot-and-socket ductile iron pipe 1 can also be non-spigot-and-socket metal tube, as shown in Figure 2.

Embodiment 2

Referring to Fig. 3, plastic-coated lining plastic metal tube except the present embodiment, the difference from embodiment 1 is that: the inner plastic The both ends of composite pipe 3 are respectively equipped with embedded enhancing ring 4, and one end of the embedded enhancing ring 4 has flange, the flange It is close to the end of spigot-and-socket ductile iron pipe 1.

Embedded 4 expanded joint of enhancing ring is in internal layer compound plastic pipe 3, and inner plastic composite pipe 3 generates one Setting becomes.The salient point of embedded enhancing 4 appearance of ring is embedded into inner plastic composite pipe 3.The inner plastic is compound It is 1.0mm that tubing 3, which generates deformation quantity,.The material of the embedded enhancing ring 4 is stainless steel.

The flange height of the embedded enhancing ring 4 is higher than inner plastic composite pipe 3, the embedded enhancing ring 4 With a thickness of 1mm, width 30mm.

The appearance of the embedded enhancing ring 4 is equipped with salient point.The salient point is formed through annular knurl, and the height of the salient point is 0.2mm。

The production of the embedded enhancing ring, the specific steps are as follows:

1) stainless steel band length cutting-steel band is cut；

2) edge rolling, flange-steel band furling plate round machine；

3) welding-bonding machine；

4) weld grinding-sander.

5) annular knurl-steel band edge knurling machine.

The outer diameter of the embedded enhancing ring is 1mm smaller than the internal diameter of interior plastic composite pipe layer.

The installation of the embedded enhancing ring, the specific steps are as follows:

1) embedded enhancing ring insertion pipe end-is artificial；

2) the expanding equipment of tensioner ring-.

Pressure by setting expanding equipment completes the installation of embedded enhancing ring.

Die deformation amount by setting expanding equipment completes the installation of embedded enhancing ring.

Certainly, spigot-and-socket ductile iron pipe 1 can be other spigot-and-socket metal tubes, such as spigot-and-socket steel pipe in the present embodiment. The spigot-and-socket ductile iron pipe 1 can also be non-spigot-and-socket metal tube, as shown in Figure 4.

Claims (7)

1. a kind of outer plastic-coated lining plastic metal composite pipe, it is characterised in that: including metal tube, outer plastic layer and interior plastic composite pipe Layer, the interior plastic composite pipe layer are made of hot melt adhesive layer and plastic tube, and the plastic tube is viscous by hot melt adhesive layer and metal tube Gu the outer plastic layer is located at outer surface of metal pipe.

2. outer plastic-coated lining plastic metal composite pipe according to claim 1, it is characterised in that: the metal tube is spigot-and-socket Metal tube.

3. outer plastic-coated lining plastic metal composite pipe according to claim 2, it is characterised in that: the spigot-and-socket metal tube is Spigot-and-socket ductile iron pipe.

4. outer plastic-coated lining plastic metal composite pipe according to claim 1 or 2 or 3, it is characterised in that: the interior plastics are multiple The both ends for closing tube layer are respectively equipped with embedded enhancing ring, and one end of the embedded enhancing ring has flange, and the flange is close to The end of metal tube.

5. outer plastic-coated lining plastic metal composite pipe according to claim 4, it is characterised in that: the embedded enhancing ring Flange height be higher than the compound tube layer of inner plastic, it is described it is embedded enhancing ring with a thickness of 1-3mm, width 10-100mm.

6. outer plastic-coated lining plastic metal composite pipe according to claim 4, it is characterised in that: the embedded enhancing ring Appearance is equipped with salient point.

7. outer plastic-coated lining plastic metal composite pipe according to claim 6, it is characterised in that: the salient point is through annular knurl or point Weldering is formed, and the height of the salient point is 0.1-2.0mm.