CN201531698U

CN201531698U - Four-way pipe piece

Info

Publication number: CN201531698U
Application number: CN2009201787856U
Authority: CN
Inventors: 石卫华; 张芳; 李世举
Original assignee: Shanghai Chunhua Electronics Co Ltd
Current assignee: Shanghai Chunhua Electronics Co Ltd
Priority date: 2009-10-14
Filing date: 2009-10-14
Publication date: 2010-07-21
Anticipated expiration: 2019-10-14

Abstract

The utility model discloses a metal insert-containing plastic H-shaped four-way pipe piece, including two parallel cylinder-shaped straight passing joints which are connected by a side passing joint in the middle vertically, thereby forming a H-shaped four-way piece penetrating completely inside, taking the side passing joint as a boundary, the two straight passing joints on the same side include the metal insert with internal screw thread, and the straight passing joint on the other side is an overall plastic end. And the cavity of the side passing joint has a conicity for demoulding. The H-shaped four-way pipe piece provided by the utility model can be used for a plastic tube type heat exchanger, thereby realizing 180-degree equivalent turn of fluid channel combined with other pieces.

Description

A kind of four-way pipe fitting

Technical field

The utility model relates to a kind of four-way pipe fitting, specifically, is a kind of H shape four-way plastic pipe of metal-containing inserts.

Background technique

Adopt after Coating Steel Pipe is used for the dwelling house feedwater piping since country prohibites, the plastic water supply pipe road has obtained to use widely.The connection in plastic water supply pipe road for convenience, various plastic pipes have been developed, and according to the number of port, 90 degree elbows, straight-through, threeway, four-way etc. are arranged.Plastics four-way pipe fitting on the market according to shape, is cross and mutation thereof no matter whether contain metal insert at present, and its common feature is to intersect on one point after the axis of four ports extends.This mainly is because the plastics four-way pipe fitting of cross and mutation thereof, and its mold design realizes easily, particularly realizes easily the demoulding time.At present, also can't see H on the market and mould the material four-way pipe fitting, promptly two straight parallel are crossed a side all and are led to and be connected to form H shape profile at the middle part.This is because the logical existence of side cause conventional Injection Mold Design to be difficult to realize the demoulding, and H shape four-way practicability aspect the pipeline connection is poor, so nobody produces at present.

In the plastic pipe, often can see the pipe fitting that contains metal insert.Why embedding metal insert in plastic pipe, mainly is because plastics are not easy to realize threaded coupling, promptly enables to realize the plastic whorl interface, also has intensity difference, fragile distortion, short problem of life-span.And metal insert can very easily be realized threaded coupling, and has the intensity height, and the advantage of durable is so metal insert has obtained using widely in plastic pipe.

The plastic pipe of metal-containing inserts, the general employing is placed in the mould metal insert injection molded.Plastics generally are PVC (PVC), PE (polyethylene) or PP-R (atactic copolymerized polypropene), and metal insert generally is to adopt the brass of stainless steel or plating nickel on surface to make.Metal insert is generally cylindrical shape, and two ends all are openings, and an end opening is big, has internal thread or outside thread, and as outreaching port, generally there is a bank in the other end in pipe fitting inside, and opening is slightly little.This bank is generally as the restriction of screw thread travel, also is that mold cores can withstand this bank during for injection moulding in addition on the one hand, prevents that plastics from entering the screw thread the inside.With the surface of plastics engagement, in order to increase sealing and steadiness, general irregular endless belt, afterbody also have 4 ~ 8 projections.

Along with the application of plastic pipe is goed deep into, plastic pipe has been not limited to be used in the water supply and drainage industry, also can be used in some other occasion, as industries such as water purification, HVAC, electrical equipment.Especially at application such as electric heating, double pipe heat exchangers, the plastic H shape four-way of metal-containing inserts can realize that in conjunction with other part the equivalence of fluid line turns through 180 degree.Because of also can't buy integrated plastic H shape four-way at present on the market,, be formed by connecting as side go side mouth with the threeway of two T shapes so all be the method that adopts assembly unit generally.Use at this type of, the utility model proposes a kind of organization plan of plastic H shape four-way, can effectively solve the problem of the unconventional mould difficulty of side, and fill up the blank in market.

The model utility content

The market demand at the plastic H shape four-way of metal-containing inserts, the utility model proposes a kind of technological scheme of integrated plastic H shape four-way, that is: connect by straight-through leading in the centre of two parallel cylindrical shapes by a side, form the H shape four-way that an inside connects fully, logical with side is the boundary, two straight-through ports of the same side contain tapped metal insert, and the straight-through port of opposite side is overall plastic port.In order to solve the logical release problems of side, the logical inner through-plane of side is designed to have certain tapering, and this tapering should be more much bigger than the conventional demoulding tapering of mould, as 5 ~ 20 °.This tapering can be single, also can be synthetic by two taper angles, form reverse toroidal.During mold design, the similar stage body structure of the former core, as frustoconic shape, only two joins with the core that leads directly to, and forms a cylinder concave surface; Latter's core is similar to two stage body butt joints, and as two round platform butt joints, big bottom surface joins with the core that leads directly to, and forms cylinder concave surface.Straight-through cavity size should guarantee that the core that side is led to can fall back on the inside when the demoulding, and convenient the taking-up, as not guaranteeing, can the core designs that side is logical become multistage to make up, so that segmentation is taken out.After injection moulding was finished, the demoulding was carried out in two steps, and the first step is taken off the core of straight-through the inside, and product shifts out mould, took out by the core of method such as artificial with side Tongli face then, because the logical tapering of side is very big, so took out core and was easy to accomplish.After the logical core of side takes out, can insert the mould the inside once more and carry out injection moulding next time.There is an internal diameter bottom of containing insert straight-through port than the little circular hole of inserts internal thread path, and this circular hole can be made of separately the circular hole of metal insert bottom, also can be made of jointly metal insert and plastics.This circular hole can be determined size according to follow-up concrete purposes, as when being used in double pipe heat exchanger, its size be for be enclosed within the heat exchanger on the pipe and other parts play together support in the effect of pipe and two cavitys of sealing inner and outer pipes.

The utility model can satisfy the application demand of double pipe heat exchanger, also can be used for the connection of water supply and drainage pipeline, has filled up the blank on the market.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Description of drawings

Fig. 1 is a schematic perspective view of the present utility model;

Fig. 2 is a used metal insert schematic perspective view in the utility model;

Fig. 3 is the generalized section of the utility model example one;

Fig. 4 is die cavity, the core demoulding schematic representation that the utility model example one leads directly to, side is logical;

Fig. 5 is the generalized section of the utility model example two;

Fig. 6 is die cavity, the core demoulding schematic representation that the utility model example two leads directly to, side is logical;

Fig. 7 is used for the generalized section of plastic sheath tubular type heat exchanger for the utility model.

Mark among the figure is as follows:

1, containing insert straight-through port, 2, the plastics straight-through port, 3, metal insert, 4, plastic outer tube, 5, metal inner pipe, 6, rubber seal, 7, metal joint, 8, rubber seal, 9, metal nuts, 10, the metal U-bend.

The section of above generalized section, Fig. 3, Fig. 5, Fig. 7 are the plane of straight-through port axis and side go side mouth axes intersect, Fig. 4, Fig. 6 be side axis line and with the plane of straight-through axis normal.For ease of observing, screw thread does not adopt the labeling form of drafting standard, but adopts graphics mode intuitively, has saved the hatching that some effects are observed simultaneously.

Embodiment

Below in conjunction with legend specific implementation method of the present utility model is described.As shown in Figure 1, this is the schematic perspective view of this example.The schematic perspective view of the metal insert that Fig. 2 uses for this example.

Fig. 3 is first example of the utility model, a pair of identical and parallel cylindrical shape is straight-through vertically to be coupled together by side is logical, logical with side is the boundary, one side is a port one, opposite side is a port 2, port one contains metal insert 3, and port 2 is a plastic port, and the logical cavity of side forms a cavity that is similar to Rotary-table.A circular hole is arranged at the bottom of containing insert port, this circular hole can be made of the circular hole of metal insert bottom, its size can be determined size according to follow-up concrete purposes, as when being used in double pipe heat exchanger, its size be for be enclosed within the heat exchanger on the pipe and other parts play together support in the effect of pipe and two cavitys of sealing inner and outer pipes.

The die cavity that Fig. 4 has illustrated in example one mold design and led directly to, side is logical, the relation of core.The cross section circle of the straight-through core of circle expression on both sides or the cross section circle of straight-through cavity, the intermediate section that is similar to the logical core of isosceles trapezoid diagrammatic representation side.Because side is logical long, so this core divides two sections formations, the centre can be designed male and fomale(M﹠F) and be connected, and prevents dislocation.Logical core of side and the face that straight-through core joins are cut into arc surface, this be for the logical core of side can frame leading directly on the core, simultaneously, also be in order to take off straight-through core earlier.Fig. 4 first row's figure has illustrated that the logical core in injection moulding front side is being led directly on the core by frame, preventing that side from leading to the core vertical movement, and substantially horizontal prevents that side is logical along straight-through axis shift, and this is fairly simple problem in the mold design, solve easily, no longer describe in detail here.Second and third row has illustrated the demoulding order of the logical core of side, after straight-through core is extracted, can wait method by hand, the logical core of side is pushed away toward bottom surface from upper bottom surface, be the direction of taper angle opening, the logical core of side can fall back in the straight-through cavity in segmentation like this, until all shifting out.After the logical core of side all shifts out, can put back to mould, carry out injection moulding next time.

Fig. 5 is second example of the utility model, is the design of side cavity body with the difference of example one.Side cavity body adopts the Rotary-table of two upper bottom surface butt joints to constitute in the example two, forms back-to-back bell mouth shape.That Fig. 6 has illustrated is straight-through in the design of example two molds, the die cavity that side is logical, the relation of core.One Fig. 4 is similar with example, and only, the logical core of side falls back on respectively in separately the straight-through cavity in the example two, takes out respectively then.The interface of two cores need be designed to male and fomale(M﹠F) in the example two, overlap, and with the face that straight-through core joins, one or more leads to the hole of the logical core of opposite side to need design, so that instruments such as use probe are pushed through the logical core of the side on opposite in the straight-through cavity on opposite.

In the above example, the logical cavity of side also can be designed to other curved surface stage body except being designed to frustoconic shape, or even other shapes such as truncated rectangular pyramids of being made up of the plane, but the simplest with frustoconic shape.

More than just tell about the main points part about the explanation of mold design, real mold design details is many, but according to the above description, the person skilled in art can realize fully.

Below in conjunction with Fig. 7 the application of the utility model in plastic sheath tubular type heat exchanger is described, is about to the utility model and turns through 180 degree in conjunction with the equivalence of two kinds of fluids of other part realization plastic sheath tubular type heat exchanger.Among the figure, plastic sheath tubular type heat exchanger has two pairs of parallel sleeve pipes, need carry out the equivalence of 180 degree and turn.Plastic port of the present utility model and plastic outer tube 4 carry out bayonet joint, according to the difference of plastic material, can adopt gluing (PVC etc.) or hot melt modes such as (PP-R, PE etc.).Metal inner pipe 5 passes the bottom circular aperture of straight-through metal-containing inserts end, rubber seal 6 is enclosed within outside the metal inner pipe 5, and puts into the bottom of metal insert.Then two all there is outside thread, there is hexagon head the centre, and the metal joint 7 of hollow screws in the metal insert, compress rubber seal 6, rubber seal 6 is all fully closely contacted with metal inner pipe 5, metal insert, metal joint 7, and the pressure of surface of contact acquire a certain degree the realization sealing, like this, the fluid passage of metal inner pipe 5 can continue by metal joint 7.After metal U-bend 10 puts metal nuts 9 and rubber seal 8 then, be inserted into the other end of metal joint 7, screw metal nuts 9 then, make rubber seal 8 press metal nuts 9, metal U-bend 10, metal joint 7, realize sealing.Like this, two kinds of fluids that plastic outer tube 4 and metal inner pipe are isolated are isolated all the time and are flowed, and wherein the fluid in the metal inner pipe 5 is realized turning through 180 degree along metal joint 7, metal U-bend 10, shown in figure hollow core arrow; And the fluid between metal inner pipe 5 and the plastics outward appearance 4 is turned through 180 degree by logical realization of the side of H shape four-way, shown in filled arrows among the figure.Use that the utility model brings advantage be that metal inner pipe 5 can disassemble, so that plastic inner pipe 4, metal inner pipe 5 are cleaned.

Claims

1. four-way pipe fitting, form by plastic body and metal insert, it is characterized in that, plastic body is straight-through leading to a side of two parallel cylindrical shapes to be connected into H shape, inner all perforations, logical with side is that two straight-through ports of boundary's one side contain tapped cylindrical metal inserts, and two straight-through ports of opposite side are plastic port; There is an internal diameter bottom of containing insert straight-through port than the little circular hole of inserts internal thread path, and this circular hole can be made of separately the circular hole of metal insert bottom, also can be made of jointly metal insert and plastics; The logical inner cavity of side has bigger tapering to be beneficial to the demoulding, can be unidirectional bell mouth shape, also can be back-to-back bell mouth shape.