CN2700681Y

CN2700681Y - Flexible loop connector with skeleton for polyethylene or polypropylene pipe fittings

Info

Publication number: CN2700681Y
Application number: CN 200420026073
Authority: CN
Inventors: 于建新
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-07
Filing date: 2004-04-07
Publication date: 2005-05-18
Anticipated expiration: 2014-04-07

Abstract

The utility model relates to a flexible loop connector with the skeleton for polyethylene or the polypropylene pipe fittings, the joint design is that the middle is fixed support skeleton material, the polyethylene or the polypropylene is injected and enwrapped between the internal layer and the external layer. The fixed support skeleton material adopts the sheet metal with uniform holes. The project solves the key issue for applying the PE and PP pipes. The utility model is especially used for the heavy caliber and high volume ductworks. In fact, the mechanical properties index: GB/ T7306-1987 such as the resisting compression, the resisting fold, etc. are satisfied by the heavy caliber PE and PP pipes, the safety type evaluation criterion of the transmission and distribution apparatus for the life drinking water prescribed by the GB/ T17219 is completely conformed.

Description

The flexible kink connecting head of band skeleton polyethylene polypropylene tube pipe

One, technical field

The utility model relates to the flexible kink connecting head of tubing, pipe fitting of polyethylene, polypropylene aqueduct.

Two, background technique

Polyethylene (PE), polypropylene (PP) because environmental friendliness, to the human body nonhazardous, be well suited for being used for aqueduct, be an inevitable development trend in particular for water supply pipeline.Though the pipeline of inner liner metal is open in a lot of patent documents: relate to the composite pipe production technology as 00113157.5, particularly a kind of method that adopts sandwich material transition drawing plastics-lined composite metal pipe, the skin of this composite pipe is metal tube (1), internal layer is plastic tube (2), the mesosphere is an interlayer transition structure material, can be wire (3), be wound on the plastic tube in a spiral manner, also can be the rectangular thin slice of curved metal (5) of the geometrical shape hole that gathers, be distributed on the plastic tube outer wall along tube axis direction with several.03129456.1 disclose a kind of polypropylene straight tube with red copper inside liner, comprise external pipe and inside liner, straight tube one side is provided with coupled logical first arm that comprises external pipe and inside liner, and the material that external pipe 1 adopts is a polypropylene, and the material that inside liner adopts is a red copper.

But prior art fails really the subject matter of polyethylene, polypropylene aqueduct is solved: because PE, PP self material, its shrinkage is up to 2-2.8%, and simple modification can not overcome this deficiency at all, also can increase cost.Expanding with heat and contract with cold and easy deformation, can't be that flexible loop type is installed pipeline and continued to connect as the socket joint tubular type of PVC.At present in polyethylene (PE), polypropylene (PP) the feedwater piping installation process generally can only be with hard connection (electric smelting socket pipe network connects, electric smelting butt joint pipe network connects, and referring to the PE pipe GB and industry standard is installed) structure.The variation of nature climatic environment brings the expanding with heat and contract with cold of large-size of PE, PP pipe network, engineering site construction etc. is brought a difficult problem, it is bigger that pipe network connects damaged hidden danger of leaking on the whole, and especially the pipe network of large scale caliber more is difficult to adopt the tubing of making and the pipe fitting of pure PE, PP material.

That pipe fitting refers generally to is isometrical, reducing tee, flanged joint, reducing straight joint, elbow, directly connect the pipe network connected element of first-class indispensability, and its joint more needs not have the link of distortion, could guarantee that the nothing of pipe network is leaked.Prior art also is provided by the flexible kink connecting head that can provide a kind of polyethylene, polypropylene pipe, pipe fitting that satisfies the pipe network needs to use.

Three, summary of the invention

The utility model purpose is: a kind of polyethylene, polypropylene pipe, the flexible kink connecting head of pipe fitting are provided, solve and to expand with heat and contract with cold on PE, the PP pipe applications and the subject matter of easy deformation, overcome in present polyethylene (PE), polypropylene (PP) the feedwater piping installation process generally can only be with hard connection (electric smelting socket pipe network connects, electric smelting butt joint pipe network connect), pipe fitting can be that tube-inserted type is installed pipeline and continued with flexible kink, especially can be used for the pipe network of heavy caliber and big flow.

The utility model purpose is achieved in that the flexible kink connecting head of polyethylene, polypropylene pipe, pipe fitting of band skeleton, it is characterized in that in polyethylene, polypropylene pipe, pipe fitting joint structure being: middle is the fixed bearing framework material, internal and external layer injection moulding parcel polyethylene, polypropylene.The fixed bearing framework material can be selected metal and nonmetal two classes for use, and the thin plate that uniform pore size is arranged is especially dashed in metal species material selection iron and steel, aluminium, copper, latten, mesh grid.Glass fibre, the carbon fiber of the braiding of non-metal kind material selection; Engineering plastics such as PVC, ABS framework material.The fixed bearing framework material all has certain intensity, can guarantee to overcome the yielding problem of PE, PP.

The flexible kink connecting head of the tubing of the utility model polyethylene, polypropylene aqueduct, pipe fitting method for making is: the method that adopts molding and forming: the action by mould is with the centre of skeletal fixation at PE, PP, the method of injection moulding: in the middle of the injection moulding die cavity of joint, be placed on framework material, by fixing pin that stretches out in the die cavity or carriage framework material is propped up to the centre earlier, the fixing pin that stretches out in the automatic drawing back die cavity when being injected into 50-80%, carriage, the demoulding is finished, is incubated in injection moulding then.Certainly, skeleton is moulding in advance, and shape is near joint or pipe fitting.Fixing pin, carriage etc. are flexible in the die cavity all can be solved by the existing technology of loosing core.

Tubing of the present utility model is meant: the product that the tube connector place is fused the utility model joint gets final product, and that the flexible kink connecting head of tubing of the present utility model, pipe fitting also refers to is isometrical, reducing tee, flanged joint, reducing straight joint, elbow, directly connect the pipe network connected element of first-class indispensability.

Characteristics of the present utility model are: solution be exactly the subject matter of PE, PP pipe applications, especially can be used for the pipe network of heavy caliber and big flow.In fact, bigbore PE, PP pipeline can satisfy mechanical performance index: GB/T7306-1987 such as resistance to compression and anti-folding, also meet the safe type evaluation of the Drinking Water transmission ﹠ distribution wetting system of GB/T17219 regulation fully, and intensity is higher, fine corrosion resistance can guarantee discharge value.Have only at joint and pipe fitting connected element and can't satisfy requirement in the application.

Four, description of drawings

Fig. 1 is the utility model pipe fitting straight connector structural representation

Fig. 2 is isometrical in the utility model pipe fitting, reducing tee joint structure schematic representation

Fig. 3 is a reducing straight joint structural representation in the utility model pipe fitting

Fig. 4 is the medium joint structure schematic representation in succession straight of the utility model pipe fitting

Fig. 5 is an elbow joints structural representation in the utility model pipe fitting

Fig. 6 is 90 degree elbow joints structural representations in the utility model pipe fitting

Fig. 7 is a flanged joint structure schematic representation in the utility model pipe fitting

Put on skeleton 1, injection moulding PE, PP2, the joint among the figure O-ring seal R arc 3, adpting flange 4, flange fixed hole 5, with pipeline connecting end 6.

Five, embodiment

As shown in the figure, the flexible kink connecting head structure of polyethylene or polypropylene pipe is shown in Fig. 1-7: pipe fitting of the present invention has covered all threeways, flanged joint, reducer union, elbow, has directly connected the pipe network connected element of first-class indispensability promptly as shown in the figure.

Skeleton 1 is the support framework material, select metal and nonmetal two classes for use, especially select the iron and steel thin sheet goods in the metal species material for use, its method for making is: can be that welded wire becomes grid or is woven into grid, it can also be the tube that is rolled into cylinder after the thin flat plate punching cutting, coupling agent treatment is especially used in the laggard capable surface treatment of production moulding.Carry out injection moulding after the processing again.With PE and PP parcel support framework.

Glass fibre, the carbon fiber of the braiding of non-metal kind material selection; The skeleton that the rigidity of finished product is made not as above-mentioned metallic material.Use PE, PP injection moulding again after can making framework material with engineering plastics such as PVC, ABS, because both expansion coefficient differ bigger, though good rigidly, intersection interface may be peeled off.Effect is also not as such scheme.The fixed bearing framework material all has certain intensity, can guarantee to overcome the yielding problem of PE, PP.The PE of injection moulding, the same prior art of PP Shooting Technique condition.Joint among the figure is provided with the R arc 3 of putting O-ring seal and is also finished by mould and injection moulding.

The joint that has adpting flange 4, flange fixed hole 5 among Fig. 7 is used for being connected use with valve etc.

Fuse with pipeline connecting end 6 and PE or PP pipeline among Fig. 1, can use the electric smelting socket to connect or Placement such as electric smelting butt joint, with pipe coupling place welding joint of the present invention, the connection of pipe network then can connect (can connect continuously) with the bell-and-spigot pipe mode of PVC structure, this connection is can be with the continued access of flexible loop type pipeline, PE or PP expand with heat and contract with cold in the joint and the problem of easy deformation has obtained solution, can guarantee that then pipe network does not have leakage because the joint is indeformable.

Caliber is more suitable for application of the present invention more than DN60mm, also being more needs the caliber used in the water inlet net of town and country.

The tubing of the utility model polyethylene, polypropylene aqueduct, the flexible kink connecting head of pipe fitting method for making are: pass through the action of mould during molding and forming with the centre of skeletal fixation at PE, PP, the method of injection moulding: in the middle of the injection moulding die cavity of joint, place framework material, by fixing pin that stretches out in the die cavity or carriage framework material is pressed against to the centre earlier, the i.e. fixing pin that stretches out in the automatic drawing back die cavity when cylinder is injected into 50-80%, carriage, the demoulding is finished, is incubated in injection moulding then.Certainly, skeleton is moulding in advance, and shape is near joint or pipe fitting.Fixing pin, carriage etc. are flexible in the die cavity all can be solved by the existing technology of loosing core.

Fig. 1-7 is a various parts pipe fitting of the present invention, and Fig. 1 is that straight connector, Fig. 2 are that 90 degree elbow joints, Fig. 7 be band flat flange joint for direct connecting head, Fig. 5 for angle elbow joints, Fig. 6 for reducer union, Fig. 4 for isometrical, reducing tee joint, Fig. 3.

Claims

1, the flexible kink connecting head of band skeleton polyethylene polypropylene tube pipe, it is characterized in that the joint structure of polyethylene, polypropylene pipe, pipe fitting is: middle is the fixed bearing framework material, internal and external layer injection moulding parcel polyethylene or polypropylene.

2, the flexible kink connecting head of band skeleton polyethylene polypropylene tube pipe according to claim 1 is characterized in that the fixed bearing framework material is the metal species material, selects iron and steel, aluminium, copper, latten, mesh grid for use.

3, the flexible kink connecting head of band skeleton polyethylene polypropylene tube pipe according to claim 2 is characterized in that the fixed bearing framework material is for dashing the thin plate that even hole is arranged.

4, the flexible kink connecting head of band skeleton polyethylene polypropylene tube pipe according to claim 1 is characterized in that the fixed bearing framework material is the non-metal kind material, chooses glass fibre, the carbon fiber of braiding; PVC, ABS engineering plastics framework material.