CN106870860A

CN106870860A - A kind of new prefabricated direct-buried heat insulation elbow

Info

Publication number: CN106870860A
Application number: CN201510944963.1A
Authority: CN
Inventors: 齐克先
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-11
Filing date: 2015-12-11
Publication date: 2017-06-20

Abstract

A kind of new prefabricated direct-buried heat insulation elbow, is constituted by protecting elbow, polyurethane foam insulation layer, support block, steel elbow outside double slit hot melt reinforced plastics, it is characterised in that：Elbow is protected outside the double slit hot melt reinforced plastics, it is to be heated and formed with two pieces of plastics arcs hot-forming in advance and two electric heating melting plates, two electric heating melting plates are ridden press against and two pieces of closing up for plastics arc locate and mutually fuse to form two reinforcements of weld, when two pieces of plastics arc plate shapes are identical, its two reinforcements of weld are respectively positioned at the outer arc surface of elbow and inner arcuate surface, when two pieces of plastics arc plate shapes are different, its two reinforcements of weld are symmetrically positioned in the split of elbow：The electric heating melting plate is material identical with plastics arc material, and width is more than 40mm, and thickness is more than 0.5 times of arc plate thickness, and one side inlays the plastic slat of heating wire net.Advantages of the present invention：Aesthetic in appearance, insulation layer thickness is uniform, and weld seam is few, and production efficiency is high, and plastics arc and electric heating melting plate are produced in batches by specialized factory, dimensionally stable, reliable in quality.

Description

A kind of new prefabricated direct-buried heat insulation elbow

First, technical field：

The invention belongs to prefabricated direct-buried thermal insulation pipe road technical field, be it is a kind of with《High-density polyethylene external protective pipe polyurethane foam is moulded Material prefabricated direct-buried thermal insulation pipe》The heat insulation elbow for matching.

2nd, background technology：

According to GB/T29047-2012《High-density polyethylene external protective pipe RPUF prefabricated direct-buried thermal insulation pipe and Pipe fitting》Standard production《Heat insulation elbow》, elbow is protected outside the vinyon used by it to be welded into vinyl tube Dried shrimp waist type elbow, is made of welding dried shrimp waist type elbow《Heat insulation elbow》, there is that welding processing amount is big, production efficiency The low, shortcoming that insulation layer thickness deviation is big.

ZL200920268946 is disclosed《A kind of welded elbow of butt-jointed seam reinforced polyvinyl plastic pipe》, the patented technology The easily cracking defect of knee bend weld seam is solved well, but in practice, it has been found that technology presence is manufactured into This height, welding job amount is big, and vinyon enhancement layer is fitted not tight problem, and patented technology use with elbow mother metal Can not solve the problems, such as that froth bed deviation is big in polyurethane foam insulation elbow.

ZL201020002477 is disclosed《A kind of polyurethane foam heat insulation bent pipe with outer polyethylene protective pipe》, the patented technology is fine Solve the problems, such as that froth bed deviation is big, but elbow outer protection tube difficult to realize for bending radius less than 3D does not have weld seam, And steel elbow cannot be formed directly into plastics outer protection tube.

3rd, the content of the invention：

For the deficiency of welding dried shrimp waist plastic elbow, meanwhile, also directed to《Heat insulation elbow》Steel elbow diameter used and curved The features such as head bending radius excursion is big, steel elbow can carry straight length, the present invention provides a kind of new prefabricated direct-buried insulation Elbow, it is to protect elbow outside double slit hot melt reinforced plastics that elbow is protected outside the plastics used by the heat insulation elbow, according to the bending of elbow Radius is different, and its two reinforcements of weld positioned at the outer arc surface of elbow and inner arcuate surface or can be symmetrically positioned in elbow respectively Facet；Heat insulation elbow for steel elbow with straight length and flow development length more than 30cm, can take first on steel elbow Binding support block, then two pieces of plastics arcs are wrapped up into steel elbow welding moulding process, and for steel elbow without straight length or Heat insulation elbow of the straight length less than 20cm, can again penetrate steel elbow using elbow is protected outside first shaping double slit hot melt reinforced plastics Production technology.

New prefabricated direct-buried heat insulation elbow of the present invention, by protecting elbow, polyurethane foam insulation outside double slit hot melt reinforced plastics Layer, support block, steel elbow are constituted, it is characterised in that：The prefabricated direct-buried heat insulation elbow, outside its double slit hot melt reinforced plastics Shield elbow is formed by two pieces of plastics arcs hot-forming in advance and two electric heating melting plate melting welding, two electric heating melting plate difference Ride press against and two pieces of closing up for plastics arc locate and mutually fuse to form two reinforcements of weld, when two pieces of plastics arc plate shape phases With and when being arranged symmetrically, its two strip hot melts reinforcement of weld is respectively positioned at the outer arc surface of elbow and inner arcuate surface；When two pieces of modelings When material arc plate shape is different, its two strip hot melts reinforcement of weld is symmetrically positioned in the split of elbow, and steel elbow adds in double slit hot melt Protected in elbow chamber outside strong plastics, the exposed 10~25cm in two ends, set in the annular gap that steel elbow is formed with shield elbow outside plastics There are support block and polyurethane foam insulation layer.

Described riding press against the electric heating melting plate that two pieces of plastics arcs close up place and mutually fuse, its material and plastics arc phase Same, width studs with the plastic slat of heating wire net more than 30mm, thickness more than 0.5 times of arc plate thickness, one side.

4th, illustrate：

It is described further with implementation method below in conjunction with the accompanying drawings.

Specification digest accompanying drawing 1 is the new prefabricated direct-buried heat insulation elbow schematic cross-section, its two reinforcement of weld difference positions In the extrados and intrados of elbow, the structure type is suitable for heat insulation elbow of the bending radius less than 3D.

Figure of description 1 is the new prefabricated direct-buried heat insulation elbow schematic cross-section, and its two reinforcements of weld are symmetrically positioned in curved The split of head, the structure type is suitable for heat insulation elbow of the bending radius more than 3D.

Figure of description 2 is electric heating melting plate schematic cross-section.

Figure of description 3 is the reinforcement of weld sectional view that plastics arc and electric heating melting plate mutually fuse formation.

In figure：1 is steel elbow；2 is to constitute the plastics arc that elbow is protected outside double slit hot melt reinforced plastics；3 is polyurethane Foam heat-insulation layer；4 is support block；5 is the reinforcement of weld that plastics arc and electric heating melting plate mutually fuse formation；6 is electricity Hot-melt plate plastic slat；7 is the heating wire net for being embedded in plastic slat surface.

5th, specific embodiment：

Implement main material needed for the present invention：Plastics arc, electric heating melting plate, steel elbow, support block, polyurethane material etc.. Required equipment has：Polyurethane foaming machine, electrothermal fusion welding machine, crane tool etc..

For the heat insulation elbow that steel elbow is more than 20cm with straight length and flow development length, embodiments thereof is：(1) steel Elbow eliminates rust and bundlees support block, and the thickness of support block used is slightly less than heat-insulation layer theoretic throat；(2) by two pieces of plastics arcs Plate wraps up steel elbow, and 10~25cm is exposed at steel elbow two ends；(3) at least with three cards being adapted with plastic elbow specification Ring or device of tying tight close up two pieces of plastics arcs；(4) ride and press against two pieces of plastics arc places of closing up and lay electric heating melting plate；(5) Electrified regulation, makes two electric heating melting plate plastic slats fuse to be formed protect curved outside double slit hot melt reinforced plastics with two pieces of plastics arcs Head；(6) treat that weld seam cools down backward steel elbow with injection polyurethane in shield elbow interlayer outside double slit hot melt reinforced plastics；(8) treat Take snap ring trimming outward appearance and size after polyurethane foam solidification apart.

Heat insulation elbow for steel elbow without straight length or flow development length less than 20cm, can use implementation below： (1) first it is made on corresponding moulds of industrial equipment " protecting elbow outside double slit hot melt reinforced plastics "；(2) steel elbow eliminates rust and only exists Elbow middle part bundlees support block, and the thickness of support block is less than heat-insulation layer theoretic throat；(3) steel elbow is inserted in molded " double slit hot melt reinforced plastics outside protect elbow ", 10~25cm of arc port is exposed at steel elbow two ends；(4) pressed from both sides at two ends Support block centering is filled in layer；(5) pressed from both sides in interlayer to shield elbow outside steel elbow and double slit hot melt reinforced plastics and inject polyurethane； (6) after trimming outward appearance and size after foam curing.

6th, beneficial effect of the present invention：

New prefabricated direct-buried heat insulation elbow of the present invention, strengthens due to dried shrimp waist type welding plastic elbow is changed into double slit hot melt Elbow is protected outside plastics, aesthetic in appearance, insulation layer thickness is uniform, required plastics arc and electric heating melting plate by specialized factory in batches Production, production efficiency is high, dimensionally stable, reliable in quality.

Claims

1. a kind of new prefabricated direct-buried heat insulation elbow, by protected outside double slit hot melt reinforced plastics elbow, polyurethane foam insulation layer, Support block, steel elbow are constituted, it is characterised in that：The prefabricated direct-buried heat insulation elbow, protects curved outside its double slit hot melt reinforced plastics Head is formed by two pieces of plastics arcs hot-forming in advance and two electric heating melting plate melting welding, and two electric heating melting plates ride pressure respectively Two pieces of closing up for plastics arc to locate and mutually fuse to form two reinforcements of weld, when two pieces of plastics arc plate shapes are identical simultaneously And when being arranged symmetrically, its two strip hot melts reinforcement of weld is respectively positioned at the outer arc surface of elbow and inner arcuate surface；When two pieces of plastics arcs When shape plate shape is different, its two strip hot melts reinforcement of weld is symmetrically positioned in the split of elbow, and steel elbow strengthens modeling in double slit hot melt In the outer shield elbow chamber of material, the exposed 10~25cm in two ends is provided with branch in the annular gap that steel elbow is formed with shield elbow outside plastics Bracer and polyurethane foam insulation layer.

2. new prefabricated direct-buried heat insulation elbow according to claim 1, it is characterised in that：Described riding press against two blocks of plastics Arc closes up place and the electric heating melting plate for mutually fusing, and its material is identical with plastics arc, width is more than 30mm, thickness Heating wire net is studded with more than 0.5 times of arc plate thickness, one side.