CN2291550Y - Multi-layered plastic pipe and its pipe joint - Google Patents
Multi-layered plastic pipe and its pipe joint Download PDFInfo
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- CN2291550Y CN2291550Y CN 97203001 CN97203001U CN2291550Y CN 2291550 Y CN2291550 Y CN 2291550Y CN 97203001 CN97203001 CN 97203001 CN 97203001 U CN97203001 U CN 97203001U CN 2291550 Y CN2291550 Y CN 2291550Y
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- multilayer plastic
- mesosphere
- plastic pipe
- pipe
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Abstract
The utility model relates to a multilayer plastic pipe (1), which comprises an inner plastic layer (10) having the functions of corrosion resistance and friction resistance, a fiber glass reinforcement middle layer (20), a foamed plastic thermal-insulating middle layer (30), and an outer layer (40) having the functions of corrosion resistance and impact resistance. Compared with the existing multilayer plastic pipe, the multilayer plastic pipe has higher tensile strength and good thermal-insulating property. The multilayer plastic pipe can be suitable for transferring fluid with corrosiveness and higher pressure and can also be suitable for special occasions. The utility model can transfer the fluid with higher temperature, higher pressure and corrosiveness under cold condition, such as the transfer of crude oil in north which can not be realized by the existing multilayer plastic pipe.
Description
The utility model relates generally to extremely pipe joint of multilayer plastic pipe, and specifically, the utility model relates to a kind of pressure-resistant plastic with thermal insulation property---fiber composite stacked tube and pipe joint thereof.
At present, in technical fields such as petrochemical industry, multilayer plastic pipe is applied.Wherein, employing plastics---expandable plastic---the plastic laminate structure that has, employing plastics---fiber---the plastics composite lamainated structure that has.The Tufnol pipe of preceding a kind of structure generally is used to have the occasion of heat insulation requirement in light weight, and the composite laminate pipe of a kind of structure in back generally is used to have the occasion of corrosion resistant, requirement of withstand voltage.Yet, up to this point, also there are not a kind of both corrosion resistants, withstand voltage, has the multilayer plastic pipe that the fluid of being carried is had heat insulation function again, to satisfy need of production practice, for example, with this pipe discharge pressure and the higher crude oil of temperature, prevent its wax deposition of in course of conveying, lowering the temperature, blocking pipeline etc.
Therefore, a purpose of the present utility model provides a kind of plastics---expandable plastic---fiber---plastics composite laminate pipe.
Another purpose of the present utility model provides a kind of joint that connects this pipe.
Multilayer plastic pipe of the present utility model comprises inner plastic corrosion-resistant, rub resistance from inside to outside successively, in the middle of the glass fibre reinforced layer, expandable plastic insulation mesosphere and corrosion-resistant, impact resistance plastics is outer.
Laminated plastics pipe joint of the present utility model comprises that two are essentially columnar metal connector body, the connecting end of two cylindrical metal fittings bodies has a radially outer flange and a radially inner flange respectively, has external screw thread on the radially outer flange of one of them cylindrical metal fittings body, with Bond these two cylindrical metal fittings bodies are bonded in respectively on the median fiber reinforced layer of two laminated plastics tube ends that will connect, the internal layer of two laminated plastics tube ends extend radially outwardly respectively form circular, be pressed in respectively on the front-end face of radially inner flange of two cylindrical metal fittings bodies, forming between the circular internal layer at two has a sealing gasket, metal nuts with radially inner flange links together two cylindrical metal fittings bodies, thereby forms a joint that connects two multilayer plastic pipes hermetically.
Compare with existing multilayer plastic pipe, multilayer plastic pipe of the present utility model has following remarkable result: because multilayer plastic pipe of the present utility model had both comprised the intermediate glass fabric reinforcement, expandable plastic thermal insulation layer in the middle of comprising again, they and corrosion-resistant, the inner plastic of rub resistance and corrosion-resistant, shock proof plastic outer layer organically combines, form one, this not only makes its tensile strength improve greatly that (tensile strength of existing multilayer plastic pipe is 80MPa, the tensile strength of multilayer plastic pipe of the present utility model is 200MPa), and, (thermal conductivity of existing multilayer plastic pipe is 0.2 watt of/meter Kelvin to have improved its insulation capacity well, the thermal conductivity of multilayer plastic pipe of the present utility model can reach 0.05 watt of/meter Kelvin), thereby, make this pipe be applicable to special occasions.Under at cryogenic conditions, carry high temperature, high-pressure liquid, for example at northern conveying crude oil.This be existing multilayer plastic pipe can't accomplish.
Compare with existing laminated plastics pipe joint, laminated plastics pipe joint of the present utility model has following remarkable result: formation is circular because the internal layer of multilayer plastic pipe extends radially outwardly, and in the middle of two circular internal layers, sealing gasket is housed, thereby make this joint have good sealing property; Make with metal owing to play two fittings bodies of part and a nut of interconnect function, this just makes join strength reliably be guaranteed.
Fig. 1 be multilayer plastic pipe of the present utility model partly cut open schematic representation.
Fig. 2 be multilayer plastic pipe of the present utility model tube end partly cut open schematic representation, expression exposes the situation in a part of internal layer and mesosphere.
Fig. 3 and Fig. 4 be two metal connector bodies using of laminated plastics pipe joint of the present utility model partly cut open schematic representation.
Fig. 5 be laminated plastics pipe joint of the present utility model partly cut open schematic representation.
Below in conjunction with accompanying drawing multilayer plastic pipe of the present utility model and joint thereof are described in detail.
Multilayer plastic pipe 1 of the present utility model comprises internal layer 10, mesosphere 20, mesosphere 30 and outer 40 as shown in Figure 1 from inside to outside successively.
Internal layer 10 is the anti-corrosion layer of oil resistant, number of chemical material such as acidproof, alkaline-resisting.In addition, internal layer also has impermeable and anti-characteristic of washing away friction.
For making internal layer 10 have good corrosion-resistant, rub resistance characteristic, it comprises following ingredients (by weight):
(1) halogenation high molecular polymer: rare 70 parts of chlorinated polyvinyl chloride second, 30 parts of PVC;
(2) stabilizer: plumbous 5 parts of tribasic butadiene dilute acid, 2 parts of dibasic Lead Phosphites, 2 parts of hard lead acids;
(3) fire retardant: 5 parts of antimonous oxides;
(4) modifier: 12 parts of haloflexes, ester modified dose 3 parts of acrylic acids;
(5) auxiliary agent: 1 part in paraffin
Mesosphere 20 is a high strength, the glass fibre reinforced layer of high rigidity.
For making mesosphere 20 have higher strength and stiffness, it comprises following ingredients (by weight):
(1) alkali-free glass fibre is 35～40 parts
(2) polyester resin 146 is closed in insatiable hunger
#25～30 parts
(3) curing agent: 0.4 part of cyclohexanone peroxide
(4) promoter: 0.15 part of epoxyeicosatrienoic acid cobalt
Mesosphere 30 is a thermal insulating warm-keeping layer
For thermal insulation layer 30 in the middle of making has good foaming structure, it comprises following ingredients (by weight):
(1) polyethers is 45 parts
(2) the poly polyisocyanates is 55 parts
(3) catalyzer: 0.55 part of diethyl acid amide, 0.05 part in lauric acid two fourth tin
(4) stabilizer: 19 parts of trifluorochloromethanes
(5) surface active agent: 1 part of silicone oil
Outer 40 is corrosion-resistant, shock resistance protective layer.
For making skin have good corrosion-resistant, shock resistance, it comprises following ingredients (by weight):
(1) polyethylene from high pressure process is 65 parts
(2) low pressure polyethylene is 35 parts
(3) carbon black is 2 parts
Multilayer plastic pipe 1 of the present utility model adopts following method manufacturing:
1. extrude internal layer 10
By the component prescription weigh batching of above-mentioned internal layer 10, the material for preparing is put into the high speed dispersion kneader, make it under 80 ℃～90 ℃ temperature, carry out high speed and mediate, the kneading time is 10～12 minutes.Then kneaded material is sent into granulation in the tablet machine.At last, the pellet of making is sent in the extruder, under about 170 ℃ temperature, the resin of fusion is extruded continuously from the mouth mould of extruder, solidify to form the internal layer 10 of multilayer plastic pipe of the present utility model after the plastic resin of the fusion of extruding from extruder is cooled.
2. twine mesosphere 20
Internal layer 10 after solidifying is cut into chunks by the Dimensions of pipe, be placed on the polisher then and polish, the cylindrical of polishing internal layer 10.
By above-mentioned mesosphere component prescription weighing unsaturated polyester resin 146
#, cycloethanone peroxide and epoxyeicosatrienoic acid cobalt, they are liquid at normal temperatures, they are mixed in stirrer, as Bond.
This Bond is coated on the internal layer 10 of the cylindrical of having polished, is wrapped on the internal layer 10 of the cylindrical of having polished after will soaking Bond by the alkali-free glass fibre of the component prescription weighing in above-mentioned mesosphere 20 with Stetch Wrapping Machine.Then, be cured in curing oven, solidifying temperature is about 60 ℃, the Bond that is cured---the alkali-free glass fibre winding layer just forms the middle reinforced layer 20 of the utility model multilayer plastic pipe.
3. co-extrusion mesosphere 30 and outer 40
The internal layer 10 and the mesosphere 20 that have formed one after solidifying are placed on the polisher cylindrical in polishing mesosphere 20.
Each liquid constituent metering is sent in the mixer by the component prescription in above-mentioned mesosphere 30 with the measuring fixed amount pump, fully mixed.
Component prescription weigh batching by above-mentioned outer 40 is sent into the material for preparing in the extruder, and under about 165 ℃ temperature, the resin of fusion is extruded from the outer collar extension of extruder die head continuously.Meanwhile, the liquid dispensing that temperature is about 70 ℃ the mesosphere that mixes 30 is sent in the extruder ejection continuously from the interior collar extension of extruder die head with pump.Like this, with extruder co-extrusion mesosphere 30 and outer 40.The mesosphere 30 of co-extrusion and outer 40 material are compounded on the cylindrical in the good mesosphere 20 of polishing.Behind cooling curing, just form the expandable plastic insulation mesosphere 30 and outer 40 of the utility model multilayer plastic pipe.Through above-mentioned steps, internal layer 10, mesosphere 20, mesosphere 30 and outer 40 just are combined with each other well, form multilayer plastic pipe of the present utility model.
Making the used whole raw material of multilayer plastic pipe of the present utility model all can buy from the market.
The thickness of each layer of multilayer plastic pipe of the present utility model is relevant with the pressure of caliber and institute's conveyance fluid.For example, to nominal diameter be in 65 pipe, the thickness of each layer is respectively: internal layer 10 is 2.5mm, and mesosphere 20 be 4.5mm, and mesosphere 30 is 10mm, skin 40 is 1.5mm; To nominal diameter is the pipe of φ 150, and the thickness of each layer is respectively: internal layer 10 is 4mm, and mesosphere 20 is 9mm, and mesosphere 30 is 10mm, and outer 40 is 2mm.
Below with reference to Fig. 2--5 structures of describing laminated plastics pipe joint 100 of the present utility model are manufacture method extremely.
With the polish end of multilayer plastic pipe 1 of the present utility model of polisher, make it have as shown in Figure 2 structure.That is: make the internal layer 10 of the end of multilayer plastic pipe 1 expose a part 11, make the mesosphere 20 of the end of multilayer plastic pipe 1 expose a part 21.
Shown in Fig. 3 and 4, two metal connector bodies 101,102 of the present utility model all are columnar basically, and their connecting end has a radially inner flange 1011,1021 and radially outer flange 1012,1022 respectively.The connecting end of metal connector body 101 has an inside groove 1015 that is limited by the inner headed face 1014 of the front-end face 1013 of inward flange 1011 and outward flange 1012.Metal connector body 102 has a water jacket 1025 that is limited by the front-end face 1024 of the periphery 1027 of inward flange 1021 and outward flange 1022.On the periphery of the outward flange 1012 of metal connector body 101, external screw thread 1016 is arranged.
As shown in Figure 5, on the part that exposes 21 in mesosphere 20, coat Bond 501, for example a kind of epoxy binder modified DE-3 that can on market, buy, to make then on the part that exposes 21,21 in mesosphere 20 that good metal connector body 101,102 bonds to two multilayer plastic pipes 1,1 as shown in Figure 2 respectively.Be about in temperature under 60 ℃ the condition, bonding portion is solidified.Then, the part that exposes 11,11 of the internal layer 10 of two multilayer plastic pipes 1,1 shown in Figure 2 is heated to about 160 ℃, makes it softening, utilize flanging die, form circular its outward flanging.After treating circular limit cooling curing, be pressed on respectively on the front-end face 1023 of inward flange 1021 of the front-end face 1013 of inward flange 1011 of metal connector body 101 and metal connector body 102.
Between two circular limits, adorn a circular sealing gasket 401, for example a polytetrafluoroethylene sealing gasket.A metal nuts 301 that has been sleeved in advance on the metal connector body 102 is tightened on the outward flange 1012 of metal connector body 101, thereby forms laminated plastics pipe joint 100 of the present utility model.At this moment, on the one hand above-mentioned two circular limits that formed by internal layer 10 and the circular sealing gasket 401 between them are in the inside groove 1015 of metal connector body 101, are crushed on tightly between two inward flanges 1011 and 1021; The radially inner flange 3011 of metal nuts 301 contacts with the outward flange 1022 of metal connector body 102 on the other hand.
Metal connector body 101,102 and metal nuts 301 used materials are generally carbon steel or stainless steel.
Claims (3)
1. multilayer plastic pipe, it is characterized in that, that this plastic tube from inside to outside comprises successively is corrosion-resistant, the inner plastic (10) of friction resistant, and glass fibre is strengthened mesosphere (20), expandable plastic insulation mesosphere (30) and corrosion-resistant, impact resistance plastics is outer (40).
2. according to the multilayer plastic pipe shown in the claim 1, it is characterized in that said internal layer (10) comprises following ingredients (by weight):
(1) halogenation high molecular polymer: rare 70 parts of chlorinated polyvinyl chloride second, 30 parts of PVC;
(2) stabilizer: plumbous 5 parts of tribasic butadiene dilute acid, 2 parts of dibasic Lead Phosphites, 2 parts of hard lead acids;
(3) fire retardant: 5 parts of antimonous oxides;
(4) modifier: 12 parts of haloflexes, ester modified dose 3 parts of acrylic acids;
(5) auxiliary agent: 1 part in paraffin
Described mesosphere (20) comprises following ingredients (by weight):
(1) alkali-free glass fibre is 35～40 parts
(2) polyester resin 146 is closed in insatiable hunger
#25～30 parts
(3) curing agent: 0.4 part of cyclohexanone peroxide
(4) promoter: 0.15 part of epoxyeicosatrienoic acid cobalt
Described mesosphere (30) comprises following ingredients (by weight):
(1) polyethers is 45 parts
(2) the poly polyisocyanates is 55 parts
(3) catalyzer: 0.55 part of diethyl acid amide, 0.05 part in lauric acid two fourth tin
(4) stabilizer: 19 parts of trifluorochloromethanes
(5) surface active agent: 1 part of silicone oil
Described skin (40) comprises following ingredients (by weight):
(1) polyethylene from high pressure process is 65 parts
(2) low pressure polyethylene is 35 parts
(3) carbon black is 2 parts
3. a connection is according to the joint of claim 1 or 2 described multilayer plastic pipes, it is characterized in that, this pipe joint comprises that two are essentially columnar metal connector body (101,102), their connecting end has a radially inner flange (1011 respectively, 1021) and a radially outer flange (1012,1022), has external screw thread (1016) on the radially outer flange (1012) of metal connector body (101), with Bond (501,501) with two metal connector bodies (101,102) be bonded in two multilayer plastic pipes (1 that will connect respectively, 1) mesosphere (20 of end, 20) on, two multilayer plastic pipes (1,1) internal layer (10 of end, 10) extend radially outwardly respectively form circular, be pressed in two metal connector bodies (101 respectively, 102) radially inner flange (1011,1021) front end and (1013,1023) on, a sealing gasket (401) is arranged between two circular internal layers, metal nuts (301) with radially inner flange (3011) is with two metal connector bodies (101,102) link together, connect two multilayer plastic pipes (1 hermetically thereby form one, 1) joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97203001 CN2291550Y (en) | 1997-04-07 | 1997-04-07 | Multi-layered plastic pipe and its pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97203001 CN2291550Y (en) | 1997-04-07 | 1997-04-07 | Multi-layered plastic pipe and its pipe joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2291550Y true CN2291550Y (en) | 1998-09-16 |
Family
ID=33923991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97203001 Expired - Fee Related CN2291550Y (en) | 1997-04-07 | 1997-04-07 | Multi-layered plastic pipe and its pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2291550Y (en) |
-
1997
- 1997-04-07 CN CN 97203001 patent/CN2291550Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |