CN2157383Y

CN2157383Y - Soft oil transferring pipe

Info

Publication number: CN2157383Y
Application number: CN 93216159
Authority: CN
Inventors: 刘文杰; 董安礼; 刘光友; 赵新国; 陈恩祥
Original assignee: Beijing Yan Yan Hose Co Ltd; Oil Research Institute of General Logistic Department of PLA
Current assignee: Beijing Yan Yan Hose Co Ltd; Oil Research Institute of General Logistic Department of PLA
Priority date: 1993-06-18
Filing date: 1993-06-18
Publication date: 1994-02-23
Anticipated expiration: 2003-06-18

Abstract

The utility model belongs to a soft oil delivery pipe, particularly belongs to the oil delivery pipe which is made of a polyether type polyurethane elastic body. The oil delivery pipe is characterized in that the oil delivery pipe is composed of a circular-pipe-shaped strip plate part which is formed by braiding synthetic fibre, the inner adhesive layer part and the outer adhesive layer part of a polyether type polyurethane elastic body, which are formed by heat-coating the internal wall and the external wall of the strip plate once time and a layer of circular-pipe-shaped film part which is adhered on the inner wall of the internal wall of the inner adhesive layer. The materials of the film have two kind, one kind is oil resistant polyether type polyurethane elastic body films which are used for delivering oil materials, and the other kind is food grade polyurethane elastic body films which are used for delivering drinking water and beverages. The utility model has the advantages of light weight and good performances and suits to be used for military and civil.

Description

Soft oil transferring pipe

The utility model belongs to soft transport pipe, particularly the soft transport pipe made from the polyether-type polyurethane elastomer.

Existing soft transport pipe generally is made up of three parts: i.e. the inner glue layer of oil resistant antiseepage; Bear the enhancement layer and the wear-resisting ageing-resistant outer glue-line of the oil resistant of coated on the enhancement layer outer wall of the single or multiple lift that synthetic fabrics that pressure keeps shape makes.Usually, select for use high-intensity synthetic fiber to make enhancement layer, adopt the way that increases inside and outside bondline thickness to prevent the fluid seepage to improve the compressive strength of transport pipe.Though this petroleum pipeline can satisfy job requirement, has the following disadvantages: a. manufacturing process more complicated: make this transport pipe and need pass through following various steps usually: the prescription design; Prescription is determined; The sizing material mastication; Add the mixing of various compounding ingredients; The extrusion of gum cover (or sheet); Glue in the flexible pipe manufacturing will be wrapped on the core tire; The braiding enhancement layer; Wrap outer glue; Bao Shuibu; Sulfuration; Tear water cloth open; The demoulding etc.B. thickness of pipe wall, weight is big, cost is high, use inconvenient: the wall thickness of this transport pipe is generally 4～5 millimeters, and the weight of every meter transport pipe reaches 1.9～2.0 kilograms, so the cost height, uses also very inconvenient.

In recent years, along with the appearance of thermoplastic elastomer (TPE), a kind of single hot coated elastomeric hose of stratotype that strengthens has appearred again.The advantage of this flexible pipe is in light weight, and intensity is big, but that its major defect is a yield rate is low, only be 60～70%, main cause has two, and one is to make the used elastomer of this flexible pipe, generally has active cyanate ester based, it is easy to contain active hydroxyl with water etc., amino material reacts, produce carbon dioxide, therefore, in hot coating procedure, can produce bubble on the hose wall, cause flexible pipe that seepage often takes place; Another is in hot coating procedure, the elastomer of fusing need see through band embryogenesis inner glue layer, and the fiber of braid embryo, in course of working such as wire drawing, plying and braiding, often have chemical substances such as oiling agent, the elastomer of heat can take place to pay reaction with these materials, forms bubble, pore etc. on hose inner wall, and the yield rate of flexible pipe is further reduced.At present, the yield rate of homemade flexible pipe can only reach 60～70%.

The purpose of this utility model is the soft transport pipe of a kind of new structure of development, advantage in light weight, that cost is low, performance is good that this transport pipe can keep, can improve the yield rate of product again, make it to be increased to more than 90% by existing 70%, and further improve reliability of products and usability.

The purpose of this utility model is achieved in that on the inner and outer wall of the cylindrical shape band embryo that fabric is made, once heat applies the EU elastomer, form inner glue layer and outer glue-line, then, on the inwall of inner glue layer, paste the film of one deck good airproof performance again, the material of film can have two kinds: a. oil resistant EU elastomer is used to carry oil plant; B. food-grade EU elastomer is used to carry potable water and beverage.

Advantage of the present utility model is: (1) is in light weight: the utility model is compared with traditional rubber hose, and every meter weight is reduced to 1 kilogram by 2 kilograms, and it is about 50% to reduce weight, uses more light; (2) cost is low: about 100 yuan of 100 millimeters rubber hose cost-per-meters of traditional φ, and about 80 yuan of the utility model cost-per-meter reduces cost about 20%; (3) improved product performance: traditional rubber hose brittleness temperature is subzero 50 ℃, and brittleness temperature of the present utility model is subzero 70 ℃, and low temperature adaptability makes moderate progress, and wear-resisting property improves an order of magnitude, stores and the prolongation in working life; (4) improved yield rate: single hot coating elastomer flexible pipe of stratotype that strengthens is compared with the utility model, and yield rate is increased to 90% by 70%.

Introduce structure of the present utility model and manufacture method thereof in detail below in conjunction with accompanying drawing:

Fig. 1 is structure section figure of the present utility model.

Referring to Fig. 1, as seen from the figure, go up to apply inner glue layer (3) and outer glue-line (1) at band embryo (2), two glue-lines (1,3) once heat coating are finished, and on the inwall of inner glue layer (3), the thin film (4) that bonds is promptly made the utility model then.

Concrete processing method of the present utility model is divided following six steps:

1. braid embryo: with synthetic tyre cord braiding cylindrical shape band embryo on circle volume machine;

2. the inside and outside glue-line of hot coated: with plastic extruder and specialized mould, coated EU elastomer glue-line once hot in nature on the inside and outside wall of band embryo.The method is similar with the method for producing the PVC water pipe.

3. film forming: on extruder and special tool the EU elastomer is extruded into reel like film, its thickness is 0.3～0.5 millimeter, and its external diameter equates with the internal diameter of flexible pipe inner glue layer.

4. film is inserted in: hose proof is being passed through on the qualified film of hunting leak.

5. exhaust: charge into pressurized air to the film inwall, folded gas between emptying flexible pipe and the film.

6. bond: pressurized air, pressurize with superheated vapor displacement film inwall make film and flexible pipe inner glue layer close adhesion.

The film that bonds on the flexible pipe inner glue layer can be selected two kinds of materials for use: 1. the EU elastomer of oil resistant is used to carry oil plant; 2. food-grade EU elastomer is used to carry potable water or beverage.

Above-mentioned accompanying drawing and explanation thereof have provided embodiment of the present utility model.

Claims

1, a kind of soft transport pipe, make by tubular shape fabric band embryo (2), it is characterized in that: the band embryo (2) inner and outer wall on scribble respectively EU elastomer inner glue layer (3) and outside glue-line (1), on the inwall of inner glue layer (3), be stained with reel like film (4).

2, as the said transport pipe of claim 1, it is characterized in that the available oil resistant EU of film (4) elastomer makes, also available food-grade polyurethane elastomer is made.