CN2240663Y

CN2240663Y - Hose with fibre reinforced coating

Info

Publication number: CN2240663Y
Application number: CN 95220612
Authority: CN
Inventors: 李振宇; 李天宝
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-19
Filing date: 1995-08-19
Publication date: 1996-11-20
Anticipated expiration: 2005-08-19

Abstract

The utility model relates to a fiber enhancement type plastic-coated hose relating to the technical field of the fluid transfer hose. The utility model is characterized in that the fiber-reinforced tube blank material is made of the high-strength glass fiber yarn or the metal fiber wire. The tube blank knitted by a circular weaving machine leaves tiny space between the warp and the weft, and the external and the internal surfaces of the tube blank are coated with a layer of thermoplastic plastics or a layer of thermoplastic elastomer coatings. So the fluid transfer pressure and the abrasion resistance of the hose are highly increased. The length of the finished product is unlimited. The utility model is favorable to the long-distance transmission. The fiber enhancement type plastic-coated hose of the utility model can be used for transferring various fluid.

Description

Fiber reinforcement type coating flexible pipe

Fiber reinforcement type coating flexible pipe of the present utility model relates to the technical field of conveyance fluid flexible pipe.

The conveyance fluid flexible pipe of prior art has pure fibre woven pipe, rubber hose, plastic flexible pipe and Chinese utility model patent, and the patent No. is 912114711 an agricultural water delivery hose etc.Pure fibrage flexible pipe is owing to exist the seepage phenomenon, be eliminated gradually, though rubber hose and plastic flexible pipe can prevent seepage, but because the intensity of rubber and plastics is lower, so can only the lower use occasion of conveyance fluid pressure, the patent No. is 912114711 agricultural water delivery hose, though adopted in the pipe with cotton or fibrage, the watertightness barrier that lining one deck is made by rubber, reached the flexible pipe that to carry elevated pressures and prevent the seepage purpose, but because the tensile strength of cotton and cotton fiber is less, therefore the pressure strength of hose of making is lower, can only make conveyance fluid pressure less than the occasion below the MPa, simultaneously as the fibre pipe blank outer surface of bearing fluid pressure, owing to there is not wear-resisting protective coating, the wear resistance that adds cotton fiber is relatively poor, and tensile strength is also lower, if therefore in use, its surface contacts with hard coarse ground or object, and the fiber pipe of fluid conveying pressure will be impaired rapidly so.Therefore and the rubber of liner can only play the leakage proof effect because tensile strength is very low, and along with the wearing and tearing of fiber pipe, the compressive strength of pipe descends rapidly, finally causes breaking and can't use.In addition also since the rubber of pipe liner in process of production, must extrude into bushing pipe in advance, and then draw in the pipe of fibrage, in the rubber bushing pipe, feed the water vapour that certain pressure intensity is arranged again, through the heating of a period of time pressurization, make the sulfuration of rubber bushing pipe and combine closely to form, so manufacturing process is also complicated with the inwall of pipe, technological process is longer, causes labour productivity higher than low production cost; Also must before sulfuration, draw in the pipe of fibrage simultaneously because of the rubber bushing pipe, so be subjected to the restriction of rubber bushing pipe tensile strength and vulcanizing equipment before sulfuration, can not make the long flexible pipe of length, this FLUID TRANSPORTATION to long distance has increased trouble and connection charge.And because the weight and volume price of cotton fiber under identical tensile strength is heavy and big than other fiber, price is also higher, causes the manufacture cost of flexible pipe higher.

The purpose of this utility model provides a kind of can reaching more than 10 MPas by conveyance fluid pressure, manufacturing process is simple, cost is lower, its factory length is not subjected to device-restrictive, and at the pipe inner and outer surface of fibrage, scribbles the fiber reinforcement type plastic-coated hose of one deck leakage proof and abrasion-resistant coating material.

Fig. 1 is that the structure and the extrusion forming of fiber reinforcement type coating flexible pipe implemented figure.

Fig. 2 is the cross-section structure of fiber reinforcement type coating flexible pipe.

Below in conjunction with the description of drawings the purpose of this utility model is to realize like this, Fig. 1 is the structure and the extrusion forming embodiment of fiber reinforcement type coating flexible pipe, it is characterized in that with the braiding of glass fiber or metal fiber wire, between each root warp, parallel, leave the inner and outer surface of the pipe (1) of micro-gap, through thermoplastics type's extruder and extrusion die, squeezing and coating one deck be polyvinyl chloride, or high polymerization degree polyvinyl chloride, or thermoplastic such as polythene, or polyvinyl chloride and blend rubber, or polyesters, or polyurethanes thermoplastic elastomer (TPE) coating.

The manufacture process of fiber reinforcement type coating flexible pipe is: the warp, parallel and the astragal that are spun into by the intensity of pipe (1) requirement with glass fiber or metal fiber wire are woven at each through leaving the pipe (1) in space between, the parallel through circular knitting machine.Then pipe (1) is packed in the extrusion die of thermoplastics type's extruder, see " Fig. 1 " because the pipe (1) of fibrage, between each graticule, leave slight void, therefore when cladding material (6), material mouth (7) in die holder (3), under the effect of extruder screw extrusion pressure, flow into die sleeve (2); Because pipe (1) is between die sleeve (2) and the core rod (5), so cladding material (6), under the extrusion pressure effect, flow in the die sleeve (2), at first be covered with in the external diameter surface of pipe (1) on the one hand, then by the slight void between each graticule of pipe (1), be covered with the space between fibrage pipe (1) inwall and core rod (5), at this moment working as pipe (1) presses under the tension of arrow (A) direction in external force, by the predefined lamellar spacing that is coated with between core rod (5) and the die sleeve (2), certain thickness fiber reinforcement type coating flexible pipe (8) is arranged inside and outside extruding.Because the cladding material in each slight void and be coated in the inside and outside cover coat of pipe (1) and closely be associated in together in the pipe (1) of fibrage is pipe (1) and integral body of inside and outside coating formation.The electrical heating elements (4) that lay at die holder among the figure (3) two is for the technological requirement of thermoplastic coating material in the squeezing and coating process.

Fiber reinforcement type coating flexible pipe of the present utility model, owing to adopted big low glass fiber or the metal fiber wire of price comparison of tensile strength, reinforcing material as the coating flexible pipe, the fluid conveying pressure of flexible pipe is greatly improved, simultaneously owing to adopted thermoplastics such as polyvinyl chloride or polythene, or polyvinyl chloride and blend rubber, or thermoplastic elastic material such as polyurethane is as the cladding material of flexible pipe, so simplified manufacturing process of flexible pipe, cost descends simultaneously, the production length of flexible pipe is not subjected to the restriction of equipment again, improved the usability of product, and because of fibre-reinforced outer surface of tube blank simultaneously squeezing and coating one deck cladding material, the wear resistance of flexible pipe is enhanced, the working life of raising flexible pipe that can be bigger.Fiber reinforcement type plastic-coated hose of the present utility model can be widely applicable for iundustrial oil, the water of FLUID TRANSPORTATION temperature below 120 degree, the conveying occasion of gas, and vast market prospect is arranged.

Claims

1. a fiber reinforcement type coating flexible pipe is made up of the pipe of fibrage and the coating on pipe surface, it is characterized in that outer surface has one deck leakage proof and abrasion-resistant coating material in the pipe (1) that is woven by glass fiber or metal fiber wire.

2. fiber reinforcement type coating flexible pipe according to claim 1, it is characterized in that the cladding material of outer surface is in the pipe (1): polyvinyl chloride, or thermoplastics such as high polymerization degree polyvinyl chloride or polythene, or polyvinyl chloride and blend rubber, or thermoplastic elastomer (TPE) such as polyurethanes.