CN106439351A - Hot melting connecting structure between metal-plastic composite pipes and manufacturing method of hot melting connecting structure - Google Patents
Hot melting connecting structure between metal-plastic composite pipes and manufacturing method of hot melting connecting structure Download PDFInfo
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- CN106439351A CN106439351A CN201610768393.XA CN201610768393A CN106439351A CN 106439351 A CN106439351 A CN 106439351A CN 201610768393 A CN201610768393 A CN 201610768393A CN 106439351 A CN106439351 A CN 106439351A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L7/00—Supporting of pipes or cables inside other pipes or sleeves, e.g. for enabling pipes or cables to be inserted or withdrawn from under roads or railways without interruption of traffic
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention relates to a hot melting connecting structure between metal-plastic composite pipes and a manufacturing method of the hot melting connecting structure. Any two adjacent metal-plastic composite pipes are connected through a middle hot melting connecting piece (6) which comprises a plastic pipe body; a layer of 304 stainless steel lining (61) is fixed to the inner wall of each plastic pipe body; a front end insertion fixing groove (62) and a rear end insertion fixing groove are (63) formed in the front end and the rear end of each plastic pipe body respectively; and the tail end of one metal-plastic composite pipe is located in the front end insertion fixing groove (62), and the tail end of the other metal-plastic composite pipe is located in the rear end insertion fixing groove (63) correspondingly. With the adoption of a middle hot melting connecting piece connecting mode, the construction is quick, the connecting quality is high, the requirement on high strength of a joint is met, and the uniformity of a joint material, a structure and a pipe body is ensured. In addition, the hot melting connecting structure and the manufacturing method have the characteristics of high efficiency, low energy consumption and operation simplicity, the manual disadvantages of operating personnel are reduced substantially, the working efficiency is increased by above two times, and the operation is more environment-friendly and safer.
Description
Technical field
The present invention relates to the attachment structure in a kind of hot water feeding pipe road, especially relate between a kind of composite metal-plastic pipe
Hot-melting connecting structure and preparation method thereof.
Background technology
At the prefabricated direct-buried composite metal-plastic pipe of city heat supply secondary pipe network metal composite pressure pipe fitting polyurethane foam
In connection construction, taking hot melt spigot-and-socket to connect the first hot melt of pipeline, the connected mode of rear socket joint, difficulty of construction is higher, and easily by outward
Boundary's environmental factor and the impact of workmen's technical ability.
One interface needs welding twice, and pure plastic pipe part is lightweight because of the addition of excessive joint so that pipeline welding mouth is sent out
Raw undergauge phenomenon, affects pipeline flow, increases the uncertainty holding sealing joint performance, inefficiency, and interface quality is unstable
Surely cause time-consuming, arduously, increase construction cost of taking a lot of work.
Content of the invention
The present invention devises hot-melting connecting structure between a kind of composite metal-plastic pipe and preparation method thereof, and it solves
It is higher to there is difficulty of construction in the existing tube connection piece of technical problem and method of attachment, and easily by outside environmental elements and workmen
The impact of technical ability, and pipeline welding mouth generation undergauge phenomenon.
In order to solve the technical problem of above-mentioned existence, present invention employs below scheme：
A kind of hot-melting connecting structure between composite metal-plastic pipe, it is characterised in that：Including many metallo-plastics are combined
Pipe, is attached by middle hot melt connector (6) between two composite metal-plastic pipes of arbitrary neighborhood, and described middle hot melt is even
Fitting (6) includes plastic tube body, fixes one layer of 304 stainless steel inner lining (61) on the inwall of plastic tube body, before plastic tube body,
Rear end has front end and inserts fixing groove (62) and the fixing groove (63) of rear end insertion, the end position of a composite metal-plastic pipe
Inserting in fixing groove (62) in front end, the end of another root composite metal-plastic pipe is positioned at rear end and inserts in fixing groove (63), and two
Root composite metal-plastic pipe and middle hot melt connector are solid by three's welding by electromagnetic induction heating coil Electromagnetic Heating mode
It is scheduled on together.
Further, also including soldering apparatus locating slot (64), soldering apparatus locating slot (64) is positioned on the outer wall of plastic tube body, and
And also be located at front end and insert fixing groove (62) and rear end is inserted and fixed between groove (63) to guarantee electromagnetic induction heating coil to front
End inserts fixing groove (62) and rear end is inserted fixing groove (63) and uniformly heated.
Further, composite metal-plastic pipe includes metal composite pressure pipe fitting (1), described metal composite pressure pipe fitting (1)
Outer layer is provided with hard polyurethane foams heat-insulation layer (2), and the outside of described hard polyurethane foams heat-insulation layer (2) is provided with high density and gathers
Ethene water-tight corrosion-proof layer (4), described metal composite pressure pipe fitting (1) by inner plastic layer (11), ferromagnetic metal layer (12) and
Outer plastic layer (13) forms, and ferromagnetic metal layer (12) is positioned between inner plastic layer (11) and outer plastic layer (13).
Further, the outer wall of inner plastic layer (11) and ferromagnetic metal layer (12) inwall are carried out solid by a hot melt adhesive layer
Fixed.
Further, the outer wall of ferromagnetic metal layer (12) and outer plastic layer (13) inwall are carried out solid by another hot melt adhesive layer
Fixed.
Further, metal composite pressure pipe fitting (1) length at every composite metal-plastic pipe two ends be longer than high density gather
Ethene water-tight corrosion-proof layer (4), high density polyethylene (HDPE) water-tight corrosion-proof layer (4) between two composite metal-plastic pipes of arbitrary neighborhood leads to
Crossing oversleeve (5) to be attached, the junction at oversleeve (5) two ends is sealed by a shrink belt (7) respectively.
Further, oversleeve (5) is provided with sprue gate (51), fills oversleeve by sprue gate (51) hard polyurethane foams
(5) sky between the space and between middle hot melt connector (6) and filling oversleeve (5) and metal composite pressure pipe fitting (1)
Between.
Further, described composite metal-plastic pipe is PE-RT the IIth, PP-R, β PP-R, fiberglass reinforced, PB, oxygen-resistance type PB, resistance
Oxygen type PE-RT, PB-R, PPS, PPO, PSF, PBT, HDPE water supply, combustion gas, the special same footpath of earth source heat pump be straight-through, with footpath threeway, different
Footpath is straight-through, reducer tee, elbow structure.
The preparation method of the hot-melting connecting structure between a kind of composite metal-plastic pipe, comprises the following steps：Step 1, system
Make a lot of root composite metal-plastic pipe；
Step 2, any two composite metal-plastic pipes are attached by middle hot melt connector (6) after, make electricity consumption
Above-mentioned three is carried out welding by magnetic induction heating coil to fix；
Step 3, after cooling, the high density polyethylene (HDPE) being connected two composite metal-plastic pipes by oversleeve (5) is waterproof anti-
Rotten layer (4), and the lap-joint on both sides is sealed with pyrocondensation belt (7), the radially even contraction of shrink belt (7) under thermodynamic activity,
Hot melt adhesive layer fusing, is evenly coated at composite metal-plastic pipe surface simultaneously；
Step 4, punching formation sprue gate (51) in the middle of oversleeve (5), and high pressure casting machine is poured into a mould rigid polyurethane foam
After foam, space between oversleeve (5) and middle hot melt connector (6) and filling oversleeve (5) and metal composite pressure pipe fitting
(1) space between forms hard polyurethane foams heat-insulation layer (2)；
Step 5, by sprue gate (51) block, whole linker terminates；
Step 6, other adjacent two composite metal-plastic pipes repeat step 2-step 5.
Further, in step 1, composite metal-plastic pipe preparation method is as follows：
Step 11, metal composite pressure pipe fitting (1) outward appearance is checked, check whether that instrumentation tubes (1) exists breakage；
Step 12, installation high density polyethylene (HDPE) support (3) outside apparently sound metal composite pressure pipe fitting (1)；
Step 13, installation high density polyethylene (HDPE) water-tight corrosion-proof layer (4) formation insulation outside high density polyethylene (HDPE) support (3)
Pipe integral piece, is propped up by high density polyethylene (HDPE) between metal composite pressure pipe fitting (1) and high density polyethylene (HDPE) water-tight corrosion-proof layer (4)
Frame (3) is supported positioning and forms filling space；
Step 14, hang gained insulating tube integral piece in step 3 on foaming platform；
Step 15, to insulating tube integral piece both ends by advance flange block；
Step 16, offer foam hole in the middle part of high density polyethylene (HDPE) water-tight corrosion-proof layer (4), inject after abscess with lid
Closure once-cast hard polyurethane foams foaming.
Step 17, exit flange closure, described composite metal-plastic pipe completes.
Middle hot melt connector of this composite metal-plastic pipe and preparation method thereof has the advantages that：
(1) present invention makes quick construction by way of middle hot melt connector connects, and quality of connection is high, strength of joint
Big needs, it is ensured that the uniformity of interface material, structure and body itself.And there is high efficiency, low energy consumption, easy-operating spy
Point, greatly reduces the manual drawback of operating personnel, improves work efficiency more than 2 times, operates more environmentally-friendly, safety.
(2) due to the fact that on the inwall of plastic tube body, fix one layer of 304 stainless steel inner lining so that middle hot-melt adhesive paste
Part, when electromagnetism hot melt, will not be affected by electromagnetic wave, thus not had " anomalistic diameter reduction " phenomenon, also would not be caused
Hinder fluid normal pass.
Brief description
Fig. 1：The axial section of composite metal-plastic pipe in the present invention；
Fig. 2：The parts connection diagram of composite metal-plastic pipe in the present invention；
Fig. 3：The high density polyethylene (HDPE) supporting structure schematic diagram of composite metal-plastic pipe in the present invention；
Fig. 4：Connection diagram I between composite metal-plastic pipe in the present invention；
Fig. 5：Connection diagram II between composite metal-plastic pipe in the present invention.
Description of reference numerals：
1 metal composite pressure pipe fitting；11 inner plastic layers；12 ferromagnetic metal layers；13 outer plastic layers；2 is hard
Matter polyurethane foam insulation layer；3 high density polyethylene (HDPE) supports；31 loop configuration；32 support blades；33 supports are flat
Platform；4 high density polyethylene (HDPE) water-tight corrosion-proof layers；5 oversleeves；51 sprue gates；6 middle hot melt connectors；61 304 is stainless
Gang Nei village；The fixing groove of annular is inserted in 62 front ends；The fixing groove of annular is inserted in 63 rear ends；64 soldering apparatus locating slots；7 heat are received
Contracting band.
Detailed description of the invention
Below in conjunction with Fig. 1 to Fig. 5, the present invention will be further described：
As it is shown in figure 1, a kind of composite metal-plastic pipe, including metal composite pressure pipe fitting 1, metal composite pressure pipe fitting 1
Outer layer is provided with hard polyurethane foams heat-insulation layer 2, and it is waterproof that the outside of hard polyurethane foams heat-insulation layer 2 is provided with high density polyethylene (HDPE)
Anticorrosive coat 4.
The present invention substitutes original steel instrumentation tubes or plastics instrumentation tubes insulation construction pattern, is collection steel instrumentation tubes and plastics work
Make the new green environment protection tubing that pipe advantage is integrated, be more suitable for the systems such as central heating, geothermal well hot water direct-furnish pipeline,
When 95 DEG C, Long-Time Service pressure, up to 1.25MPa, for reducing environmental pollution, reduces heat consumption, saves the energy, improves arranging of environment
Execute and contribute.
As in figure 2 it is shown, gathered by high density between metal composite pressure pipe fitting 1 and high density polyethylene (HDPE) water-tight corrosion-proof layer 4
Ethene support 3 is supported positioning and forms filling space, and filling space is filled with hard polyurethane foams heat-insulation layer 2.
It as it is shown on figure 3, high density polyethylene (HDPE) support 3 includes a loop configuration 31, inside loop configuration 31, is fixed on gold
Belong on composite pressure pipe fitting 1, loop configuration 31 outer wall is fixed the support blade 32 of multiple divergence expression, support blade 32 outermost end
Portion is provided with support platform 33, and support blade 32 and support platform 33 form T-shaped structure, and T-shaped structure is by way of extruding
Metal composite pressure pipe fitting 1 is fixed with both high density polyethylene (HDPE) water-tight corrosion-proof layers 4.
As shown in Figure 4, metal composite pressure pipe fitting 1 is by inner plastic layer the 11st, ferromagnetic metal layer 12 and outer plastic layer 13
Composition, ferromagnetic metal layer 12 is positioned between inner plastic layer 11 and outer plastic layer 13.The outer wall of inner plastic layer 11 and ferromagnetism gold
Belong to layer 12 inwall to be fixed by a hot melt adhesive layer.The outer wall of ferromagnetic metal layer 12 passes through another with outer plastic layer 13 inwall
Hot melt adhesive layer is fixed.
The present invention uses steel-plastics composite pipe to substitute steel pipe so that composite plastic pipe inner wall smooth, less scaling, flow resistance
Little, heat loss is little, and system operating efficiency is high；Thermal conductivity factor is 0.21W/ (mK), compares metal pipe material heat loss less, more supernumerary segment
Energy.
The preparation method of composite metal-plastic pipe of the present invention, comprises the following steps：
Step 11, metal composite pressure pipe fitting 1 outward appearance is checked, check whether that instrumentation tubes 1 exists breakage.
Step 12, outside apparently sound metal composite pressure pipe fitting 1 install high density polyethylene (HDPE) support 3.
Step 13, outside high density polyethylene (HDPE) support 3 install high density polyethylene (HDPE) water-tight corrosion-proof layer 4 form insulating tube one
Body part, is carried out by high density polyethylene (HDPE) support 3 between metal composite pressure pipe fitting 1 and high density polyethylene (HDPE) water-tight corrosion-proof layer 4
Support positioning and form filling space.
Step 14, hang gained insulating tube integral piece in step 3 on foaming platform.
Step 15, to insulating tube integral piece both ends by advance flange block.
Step 16, offer foam hole in the middle part of high density polyethylene (HDPE) water-tight corrosion-proof layer 4, inject after abscess by lid envelope
Stifled once-cast hard polyurethane foams foaming.
Step 17, exit flange closure, composite metal-plastic pipe completes.
As shown in Figure 4 and Figure 5, the middle hot melt connector of a kind of composite metal-plastic pipe, including plastic tube body, at plastics
Fix one layer of 304 stainless steel inner lining 61 on the inwall of body, body front and back end have front end insert fixing groove 62 and after
End inserts fixing groove 63, and the end of a composite metal-plastic pipe is positioned at front end and inserts in fixing groove 62, another root metallo-plastic
The end of multiple tube is positioned at rear end and inserts in fixing groove 63, and two composite metal-plastic pipes and middle hot melt connector pass through electromagnetism
Three is welded and fixed on together by load coil Electromagnetic Heating mode.
Above-mentioned electromagnetic induction heating coil operation principle is as follows：When electromagnetic induction heating coil energising work, two gold
The ferromagnetic metal layer 12 belonging to plastic composite pipe forms eddy current and gradually generates heat, and heat is gradually by two composite metal-plastic pipes
Parts of plastics and the parts of plastics of middle hot melt connector melt, and final three merges.
Meanwhile, owing to fixing one layer of 304 stainless steel inner lining 61,304 stainless steel inner lining on the inwall at plastic tube body
61 do not sense due to electromagnetic wave, also will not produce heat, so it will not occur any deformation.Hot melt also would not occur
During " anomalistic diameter reduction " phenomenon, fluid normal pass can be hindered, even occur internal diameter of the pipeline blocking extreme phenomenon.
Additionally, also include soldering apparatus locating slot 64, soldering apparatus locating slot 64 is positioned on the outer wall of plastic tube body, and also position
Insert between fixing groove 62 and the fixing groove 63 of rear end insertion fixing to guarantee that front end is inserted by electromagnetic induction heating coil in front end
Groove 62 and rear end are inserted fixing groove 63 and are uniformly heated.
It is waterproof anti-that metal composite pressure pipe fitting 1 length at every composite metal-plastic pipe two ends is longer than high density polyethylene (HDPE)
Rotten layer 4, the high density polyethylene (HDPE) water-tight corrosion-proof layer 4 between two composite metal-plastic pipes of arbitrary neighborhood is carried out even by oversleeve 5
Connecing, the junction at oversleeve 5 two ends is sealed by a shrink belt 7 respectively.
Oversleeve 5 is provided with sprue gate 51, fills oversleeve 5 and middle hot-melt adhesive paste by sprue gate 51 hard polyurethane foams
Space between space between part 6 and filling oversleeve 5 and metal composite pressure pipe fitting 1.
The preparation method of the hot-melting connecting structure between composite metal-plastic pipe of the present invention, comprises the following steps：Step 1,
Make many composite metal-plastic pipes.
Step 2, any two composite metal-plastic pipes are attached by middle hot melt connector 6 after, use electromagnetism
Above-mentioned three is carried out welding by load coil to fix.
Step 3, after cooling, is connected the high density polyethylene (HDPE) water-tight corrosion-proof of two composite metal-plastic pipes by oversleeve 5
Layer 4, and the lap-joint on both sides, the radially even contraction of shrink belt 7, simultaneously hot melt under thermodynamic activity is sealed with pyrocondensation belt 7
Glue-line melts, and is evenly coated at composite metal-plastic pipe surface.
Step 4, in the middle of the oversleeve 5 punching form sprue gate 51, and by high pressure casting machine cast hard polyurethane foams after,
Space between space between oversleeve 5 and middle hot melt connector 6 and filling oversleeve 5 and metal composite pressure pipe fitting 1
Form hard polyurethane foams heat-insulation layer 2.
Step 5, blocking sprue gate 51, whole linker terminates.
Step 6, other adjacent two composite metal-plastic pipes repeat step 2-step 5.
The material of hard polyurethane foams heat-insulation layer 2 is that the nano particle of environmental protection strengthens modified polyurethane foam plastics,
It comprises following components according to weight fraction meter in its raw material：The PPG of 100 weight portions；The nanometer of 5-7 weight portion
SiO2；1.02.0 the water of weight portion；1.5The surfactant of 3.0 weight portions；0.3The conventional amine catalyst of 1 weight portion；
0.4The response type amine catalyst of 2.5 weight portions；25The foaming agent of 30 weight portions；The MDI system isocyanic acid of 145 weight portions
Ester.
Surfactant is polysiloxanes, the trade mark 3303 that middle Shandong fine horse Chemical Co., Ltd. produces, described surface-active
Foam surface tension force is reduced in agent, controls cell size stable foam effect.Response type amine catalyst is dimethyl cyclohexyl amine, described
Response type amine catalyst participates in polyurethane reaction, controls expansion rate.Conventional amine catalyst is triethanolamine, and triethanolamine controls
Polymerization rate.Foaming agent is a fluorine dichloroethanes.In PPG, polyethers is with glycerine as initiator, expoxy propane open loop
Polymerization, hydroxyl value 480mgK0H/g, number-average molecular weight about 400.Nano-meter SiO_22It is 15 for average grain diameter30nm, apparent density is
0.12g/cm3, purity is 99.5%.
The present invention uses the prefabricated direct-buried thermal insulation pipe improving rigid polyurethane foam intensity, and good nanosized SiO_2 is scattered in poly-
Its mechanical property can be played enhanced effect in hard bubbling by urethane, and mechanical test shows, adds nano silicon to hard
Polyurethane foam plastics has certain activeness and quietness effect, compares in being not added with SiO2, the compressive strength of foam improve 20% with
On, impact strength can improve about 30%.
The material of hard polyurethane foams heat-insulation layer 2 can also reclaim waste hard polyurethane foam making guarantor for utilizing
Temperature tube material, it, according to weight fraction meter, comprises PPG, the 10-20 weight of following components 80-90 weight portion in its raw material
The Product liquid oligomer polyol mixture of waste polyurethane rigid foam glycolysis of amount part, 1.0-1.5 weight portion water,
The surfactant of 1.5-3.0 weight portion, the response type amine catalyst of 0.4-1.5 weight portion, the conventional amine of 0.3-1 weight portion are urged
Agent, the crosslinking agent of 0-1.5 weight portion：The foaming agent of 30-50 weight portion：Described black material is the polymeric MDI of 145-150 weight portion
System isocyanate.
The Product liquid oligomer polyol mixture of waste polyurethane rigid foam glycolysis is by waste hard polyurethane
Foamed plastics puts into waste polyurethane rigid foam in reactor after crusher in crushing in the following proportions, adds alcoholysis
Agent, 150-220 degree Celsius of reaction 8-10 hour gained under the effect of alcoholysis agent；Wherein, waste polyurethane rigid foam with
The weight ratio of alcoholysis agent is 2：1.Alcoholysis agent is diethylene glycol, and its manufacturer is Beijing Chemical Plant.
Above-mentioned reaction mechanism：Common existence in alcoholysis agent and catalyst (having there is catalyst in waste polyurethane foam)
Under, the amino-formate bond in polyurethane ruptures, overall as follows by short alcohol chain replacement key reaction formula：
-R1-NH-CO-O-R2+HO-R3-OH→R1-NH-CO-O-R3-OH, wherein R1、R2It is all carbamate groups, R3
For alcoholysis agent group.
Alcoholysis method itself is the polyalcohol that polyurethane waste material is re-used to synthesis of polyurethane material, the liquid that can re-use
Body oligomer, still has certain reactivity, can directly react with isocyanates, thus alternative a series of for synthesizing
Polyurethane products, thus realize the recycling of raw material.
Waste polyurethane rigid foam can be directly added in white material use after pulverizing, but is only limited to manual operations, because pulverizing
After the light volume of foam wt big, increase the viscosity of white material, limited by machine pump, filter, head, easy block pumps, mistake
Filter, head, so use can not be placed in high pressure casting machine.It is liquid and can be direct after mixing with other components after alcoholysis
For equipment.
The purpose that recovery waste polyurethane rigid foam carries out glycolysis is RPUF as one
Important material, the reasonable recycling to its waste product, can not only effectively protect environment to reduce pollution and can save
Resource-saving is turned waste into wealth, but also has significant Social benefit and economic benefit, is also the effective measure of heating energy-saving.Permissible
Reduce the pollution to environment, it is achieved recycling and environmental protection theory of resource.
Combined polyether glycol with the weight ratio of polymeric MDI system isocyanate is：1:1-1.05, described combined polyether is many
Unit's alcohol includes PPG, the Product liquid oligomer polyol mixture of waste polyurethane rigid foam glycolysis, water, table
Face activating agent, response type amine catalyst, conventional amine catalyst and foaming agent.
Wherein, surfactant is polysiloxanes, and model is 3303, and it reduces foam surface tension force, controls cell size
Stable foam effect；Response type amine catalyst dimethyl cyclohexyl amine：Participate in polyurethane reaction, control expansion rate；Conventional amine is urged
Agent triethanolamine, controls polymerization rate.Foaming agent is a fluorine dichloroethanes.Further, described combined polyether glycol
Refer to include the mixture of polyethers, water, surfactant, catalyst and the foaming agent of 80-90wt% with 10-20wt%'s
Reclaim the Product liquid oligomer polyol of waste polyurethane rigid foam glycolysis.Polyethers in PPG with glycerine is
Initiator, expoxy propane ring-opening polymerisation, hydroxyl value 430-480mgK0H/g.
The present invention uses alcoholysis method to can get the alcoholysis product liquid oligomer polyalcohol mixing of active hydrogen group end-blocking
Thing can be directly used as the insulating tube producing, and processes through alcoholysis and obtains liquid oligomer polyol blends, can be with other plastics
Produce interaction force between matrix, be greatly improved the heat-insulating property of insulating tube.
Above in conjunction with accompanying drawing, exemplary description is carried out to the present invention, it is clear that the realization of the present invention is not by aforesaid way
Restriction, as long as have employed method design and the various improvement that carry out of technical scheme of the present invention or not improved by the present invention
Design and technical scheme directly apply to other occasions, all within the scope of the present invention.
Claims (10)
1. the hot-melting connecting structure between a composite metal-plastic pipe, it is characterised in that：Including many composite metal-plastic pipes,
It is attached by middle hot melt connector (6) between two composite metal-plastic pipes of arbitrary neighborhood, described middle hot-melt adhesive paste
Part (6) includes plastic tube body, fixes one layer of 304 stainless steel inner lining (61) on the inwall of plastic tube body, forward and backward at plastic tube body
End has front end and inserts fixing groove (62) and the fixing groove (63) of rear end insertion, and the end of a composite metal-plastic pipe is positioned at
Front end is inserted in fixing groove (62), and the end of another root composite metal-plastic pipe is positioned at rear end and inserts in fixing groove (63), two
Three's welding is fixed by composite metal-plastic pipe and middle hot melt connector by electromagnetic induction heating coil Electromagnetic Heating mode
Together.
2. the hot-melting connecting structure between composite metal-plastic pipe according to claim 1, it is characterised in that：Also include welding
Device locating slot (64), soldering apparatus locating slot (64) is positioned on the outer wall of plastic tube body, and also is located at the fixing groove of front end insertion
(62) insert between fixing groove (63) with rear end to guarantee that fixing groove (62) and rear end are inserted in front end by electromagnetic induction heating coil
Insert fixing groove (63) uniformly to heat.
3. the hot-melting connecting structure between composite metal-plastic pipe according to claim 1 or claim 2, it is characterised in that：Metal is moulded
Material multiple tube includes metal composite pressure pipe fitting (1), and described metal composite pressure pipe fitting (1) outer layer is provided with hard polyurethane foams
Heat-insulation layer (2), the outside of described hard polyurethane foams heat-insulation layer (2) is provided with high density polyethylene (HDPE) water-tight corrosion-proof layer (4), described
Metal composite pressure pipe fitting (1) is made up of inner plastic layer (11), ferromagnetic metal layer (12) and outer plastic layer (13), ferromagnetism
Metal level (12) is positioned between inner plastic layer (11) and outer plastic layer (13).
4. the hot-melting connecting structure between composite metal-plastic pipe according to claim the 1st, 2 or 3, it is characterised in that：Inside mould
The outer wall of the bed of material (11) is fixed by a hot melt adhesive layer with ferromagnetic metal layer (12) inwall.
5. the hot-melting connecting structure between composite metal-plastic pipe according in any of the one of claim 1-4, its feature exists
In：The outer wall of ferromagnetic metal layer (12) is fixed by another hot melt adhesive layer with outer plastic layer (13) inwall.
6. the hot-melting connecting structure between composite metal-plastic pipe according in any of the one of claim 1-5, its feature exists
In：Metal composite pressure pipe fitting (1) length at every composite metal-plastic pipe two ends is longer than high density polyethylene (HDPE) water-tight corrosion-proof
Layer (4), high density polyethylene (HDPE) water-tight corrosion-proof layer (4) between two composite metal-plastic pipes of arbitrary neighborhood is entered by oversleeve (5)
Row connects, and the junction at oversleeve (5) two ends is sealed by a shrink belt (7) respectively.
7. the hot-melting connecting structure between composite metal-plastic pipe according in any of the one of claim 1-6, its feature exists
In：Oversleeve (5) is provided with sprue gate (51), fills oversleeve (5) and middle hot melt by sprue gate (51) hard polyurethane foams
Space between space between connector (6) and filling oversleeve (5) and metal composite pressure pipe fitting (1).
8. the middle hot melt connector of composite metal-plastic pipe according in any of the one of claim 1-7, it is characterised in that：
Described composite metal-plastic pipe is PE-RT the IIth, PP-R, β PP-R, fiberglass reinforced, PB, oxygen-resistance type PB, oxygen-resistance type PE-RT, PB-R,
PPS, PPO, PSF, PBT, HDPE water supply, combustion gas, the special same footpath of earth source heat pump are straight-through, with footpath threeway, reducing coupling, reducing three
Logical, elbow structure.
9. a preparation method for the hot-melting connecting structure between composite metal-plastic pipe, comprises the following steps：Step 1, making
A lot of root composite metal-plastic pipes；
Step 2, any two composite metal-plastic pipes are attached by middle hot melt connector (6) after, use electromagnetism sense
Coil should be heated above-mentioned three is carried out welding fix；
Step 3, after cooling, is connected the high density polyethylene (HDPE) water-tight corrosion-proof layer of two composite metal-plastic pipes by oversleeve (5)
(4) lap-joint, and with pyrocondensation belt (7) sealing both sides, the radially even contraction of shrink belt (7) under thermodynamic activity, simultaneously
Hot melt adhesive layer melts, and is evenly coated at composite metal-plastic pipe surface；
Step 4, in the middle of the oversleeve (5) punching form sprue gate (51), and by high pressure casting machine cast hard polyurethane foams after,
Space between oversleeve (5) and middle hot melt connector (6) and filling oversleeve (5) and metal composite pressure pipe fitting (1) it
Between space formed hard polyurethane foams heat-insulation layer (2)；
Step 5, by sprue gate (51) block, whole linker terminates；
Step 6, other adjacent two composite metal-plastic pipes repeat step 2-step 5.
10. the preparation method of the hot-melting connecting structure between composite metal-plastic pipe according to claim 9, its feature exists
In：In step 1, composite metal-plastic pipe preparation method is as follows：
Step 11, metal composite pressure pipe fitting (1) outward appearance is checked, check whether that instrumentation tubes (1) exists breakage；
Step 12, installation high density polyethylene (HDPE) support (3) outside apparently sound metal composite pressure pipe fitting (1)；
Step 13, form insulating tube one at outside high density polyethylene (HDPE) water-tight corrosion-proof layer (4) of installing of high density polyethylene (HDPE) support (3)
Body part, passes through high density polyethylene (HDPE) support between metal composite pressure pipe fitting (1) and high density polyethylene (HDPE) water-tight corrosion-proof layer (4)
(3) it is supported positioning and form filling space；
Step 14, hang gained insulating tube integral piece in step 3 on foaming platform；
Step 15, to insulating tube integral piece both ends by advance flange block；
Step 16, offer foam hole in the middle part of high density polyethylene (HDPE) water-tight corrosion-proof layer (4), inject after abscess with lid closure
Once-cast hard polyurethane foams foaming.
Step 17, exit flange closure, described tool composite metal-plastic pipe complete.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505102A (en) * | 2017-08-09 | 2017-12-22 | 合肥达科环保科技有限公司 | A kind of processing molding method of the pipeline assembly of gas leakage measuring and testing device |
| CN109442142A (en) * | 2018-11-26 | 2019-03-08 | 日丰科技有限公司 | Encapsulating method, multiple tube and the pipe fitting joint structure of metal layer |
| CN110461579A (en) * | 2017-03-13 | 2019-11-15 | 霍里奥特农业合作社有限责任公司 | The solderable union nipple of induction with the solderable slotting notch edges of thermal insulation induction |
| CN110856967A (en) * | 2018-08-23 | 2020-03-03 | 杜凯公司 | Connecting assembly and method for manufacturing same |
| CN110861250A (en) * | 2019-11-21 | 2020-03-06 | 上海宝冶集团有限公司 | Foaming and heat-insulating method for low-temperature working condition refrigeration pipeline |
| CN113300293A (en) * | 2021-05-14 | 2021-08-24 | 陈扬仕 | MPP cable pipe convenient to butt fusion installation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100072742A1 (en) * | 2008-09-19 | 2010-03-25 | Emabond Solutions, Llc | Electromagnetic Bond Welding of Thermoplastic Pipe Distribution Systems |
| CN202546113U (en) * | 2012-04-20 | 2012-11-21 | 杨蒙 | Electro-magnetic induction welded steel-plastic complex pipe fitting |
| CN104676138A (en) * | 2013-11-26 | 2015-06-03 | 天津市恒洁久安科技有限公司 | Plastic pipe |
| CN105351660A (en) * | 2015-11-02 | 2016-02-24 | 天津军星管业集团有限公司 | Plastic pipeline connecting piece with heating rings and manufacturing method of plastic pipeline connecting piece |
| CN105351658A (en) * | 2015-12-08 | 2016-02-24 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Thermal-insulation pipe elbow with high-density polyethylene reinforced bracket and manufacturing method for thermal-insulation pipe elbow |
-
2016
- 2016-08-30 CN CN201610768393.XA patent/CN106439351A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100072742A1 (en) * | 2008-09-19 | 2010-03-25 | Emabond Solutions, Llc | Electromagnetic Bond Welding of Thermoplastic Pipe Distribution Systems |
| CN202546113U (en) * | 2012-04-20 | 2012-11-21 | 杨蒙 | Electro-magnetic induction welded steel-plastic complex pipe fitting |
| CN104676138A (en) * | 2013-11-26 | 2015-06-03 | 天津市恒洁久安科技有限公司 | Plastic pipe |
| CN105351660A (en) * | 2015-11-02 | 2016-02-24 | 天津军星管业集团有限公司 | Plastic pipeline connecting piece with heating rings and manufacturing method of plastic pipeline connecting piece |
| CN105351658A (en) * | 2015-12-08 | 2016-02-24 | 朗格斯特哈尔滨环保节能产品制造有限公司 | Thermal-insulation pipe elbow with high-density polyethylene reinforced bracket and manufacturing method for thermal-insulation pipe elbow |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110461579A (en) * | 2017-03-13 | 2019-11-15 | 霍里奥特农业合作社有限责任公司 | The solderable union nipple of induction with the solderable slotting notch edges of thermal insulation induction |
| CN110461579B (en) * | 2017-03-13 | 2020-06-09 | 霍里奥特农业合作社有限责任公司 | Induction weldable pipe connector with thermally insulated induction weldable socket notch edge |
| CN107505102A (en) * | 2017-08-09 | 2017-12-22 | 合肥达科环保科技有限公司 | A kind of processing molding method of the pipeline assembly of gas leakage measuring and testing device |
| CN110856967A (en) * | 2018-08-23 | 2020-03-03 | 杜凯公司 | Connecting assembly and method for manufacturing same |
| CN109442142A (en) * | 2018-11-26 | 2019-03-08 | 日丰科技有限公司 | Encapsulating method, multiple tube and the pipe fitting joint structure of metal layer |
| CN110861250A (en) * | 2019-11-21 | 2020-03-06 | 上海宝冶集团有限公司 | Foaming and heat-insulating method for low-temperature working condition refrigeration pipeline |
| CN113300293A (en) * | 2021-05-14 | 2021-08-24 | 陈扬仕 | MPP cable pipe convenient to butt fusion installation |
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