DE1817233B2 - High pressure hose - Google Patents

Description

30th

The invention relates to a high pressure hose, which consists of at least two coaxial, tubular grains a rubber material and a textile reinforcement insert enclosed between these Has strip material, which consists of at least two in a common plane and with mutual contact Yarns running parallel to one another each consist of several continuous threads and is firmly connected to the two associated tubular bodies via a polymeric binder.

In a known hose of this type, the reinforcing bands are helical on the inner ones Coiled rubber body. The tape windings in each layer lie on one another Distance and intersect from layer to layer. Each band in turn consists of several parallel ones textile threads in a binder, e.g. B. in rubber, are embedded. The reinforcement bands are each wound under considerable tension, so that they are each at least partially in the spaces move in between adjacent turns of the tape of the underlying layer. The the individual The threads that form ribbons can be twisted. In individual layers, however, tapes can also be made untwisted threads should be provided (see Swiss Hatentschrift 60 841).

BH another known hose of this type are the reinforcing inserts in each case as braided hoses educated. An inner braided hose can consist of four yarns each until six twisted threads are made. After the application, a Rubber paste or a dough-like rubber mass applied. The application takes place in such a way that the material penetrates into the spaces between the yarns of the braid. The rubber mass forms at the same time a thin intermediate layer between the first braided hose and the second braided hose. The latter is made from yarns composed of twisted threads. the Yarns in both layers can also be made from mono or continuous threads or from thin strips which are cut from foils of the textile material concerned (see British patent specification 8 66 904). In this known hose, the inner braided hose adheres to the inner rubber body as well on the second braided hose with the help of the rubber compound pressed through the braided interstices. The textile material of the outer braided hose is made by immersion in a binder latex pretreated and therefore has good adhesion to the outer rubber body.

The invention is based on the knowledge that in the treatment of twisted or twisted multifilament yarn with a binding agent this treatment exclusively on the surface of the twisted Yarn remains limited when one therefore uses high-pressure hoses made of such textile reinforcement materials is produced despite the adhesive bonding of the individual yarns to the adjacent ones via the binding agent Rubber layers inside the jacket of the high pressure hose create a wick effect. This can have the consequence that in such high-pressure hoses the fluid guided in the hoses wicks through the yarn migrates through and thereby leads to a detachment or separation of individual layers of the high-pressure hose leads.

In contrast, it is the object of the invention to provide a high-pressure hose of the type specified in the introduction Kind of further training in such a way that the wick effect is eliminated and the risk of individual detachment Layers forming the hose when the hose is used is banned.

This object is achieved according to the invention in that the essentially untwisted or untwisted Yarns of the tape material of the or each reinforcement insert in all cross-sections up to the Interiors of the yarns are soaked throughout with the polymeric binder that essentially each single thread of the yarn is impregnated with the binding agent and the yarn to dry matter of the binding agent comprises an amount of at least 10% by weight of the yarn.

It is essential that when the yarns are treated in the impregnation bath, they are soaked throughout takes place with a polymeric binder into the interior of the yarn, so that essentially every single thread of the yarn is impregnated with the binder. When dipping twisted or twisted Yarns usually have a solids uptake of around 4 to 7% of the weight of the yarn, calculated on the dry substance of the binder. The amount absorbed is essentially dependent on the geometric shape of the yarn. In that, according to the invention, yarns are used to produce the strip material are used, which are essentially untwisted or untwisted, a recording is obtained in the bath of the dry substance of the binding agent! », which is at least 10% of the weight of the yarn. ' Simultaneously a continuous impregnation with polymeric binding material is obtained. The impregnation extends into the interior of the yarns into it, so that essentially every single fiber or thread of the yarn is impregnated is. Due to this training, the wick-

effect excluded. Because the yarn over their whole As long as the inner core of the cross-section is impregnated, no fluid can get into the interior at any point of the yarn penetrate. This is also everyone's separation phenomenon the individual layers excluded due to the pressure of the fluid penetrating the yarn, because in every braid layer of the finished tube every single yarn and every thread of the individual Yarn is firmly connected to the adjacent thread over the entire length of the yarn, so that the individual Layers to each other and the individual components of each layer to each other an impermeable Enter into connection.

The arrangement is advantageously such that the binder content is 12 to 15% of the weight of the yarn amounts to

The threads forming the individual yarns are continuous threads. These can be synthetic or are made of natural materials and vary in the yarns depending on the desired properties be composed. It is also possible to use individual continuous filaments made from copolymers will. The yarns can also consist of glass thread.

The yarns used to make the tape material can contain about 50 to 2000 threads. the Fineness of the yarn can be between 1100 and 4400 denier.

The band-shaped material can be used in the manufacture of the reinforcement inserts of the high-pressure hose in a braiding or spinning process or by helical winding.

The invention is explained in more detail below with reference to schematic drawings of an exemplary embodiment explained. It shows

F i g. 1 shows a high-pressure hose according to the invention in plan view, partially in section, and

F i g. 2 a device with the help of which the essential features of the new high-pressure hose can be achieved can be guaranteed.

The in F i g. 1 shown high pressure hose 40 has an inner, tubular body 42 from a G mmimaterial on. A first textile reinforcement insert 44 is applied to this. About this reinforcement insert is a second tubular body 46 made of a rubber material is provided on which a second textile reinforcement insert 48 is applied. The whole is surrounded by a coaxial tubular Body 50 made of rubber material.

| Every textile reinforcement insert is therefore between two coaxial tubular bodies made of rubber material locked in. Each reinforcement insert 44 and 48 is made by braiding the underlying body formed using a tape material 38. The tape material is previously in a below Carefully impregnated with a polymeric binder in the manner to be described. After building each Layers are the high pressure hose, ζ. Β. vulcanized using the well-known lead jacket technology. This creates an intimate bond between the tubular body made of rubber material and the respective adjacent reinforcement inserts impregnated with binder. Instead of the two reinforcement inserts You can also use three or more of these reinforcement inserts applied with the interposition of a tubular body made of rubber material will.

As shown in FIG. 1, the tape material 38 used to form the reinforcement insert consists of two or more, in the example according to FIG. 2 of four yarns 32a, 32b, 32c and 32c / running parallel to one another in a common plane and in mutual contact, each consisting of several continuous threads. Each of the yarns is drawn off from a winding in a group 10 of containers 10a, 106, 10c and 10c / during the manufacture of the strip material. The threads of the individual yarns are essentially untwisted or untwisted. The four threads are passed through guide sleeves 12 and 14 at a mutual distance into a container 16 in which a bath 18 of a polymeric binder is provided. The separately guided yarns run from the container 16 via guide eyes 20 and 22 into a slotted convergence eye 24 that brings the threads together and from there together through a tensioning device 26. The strip material leaving the tensioning device 26 is wound onto a winding mandrel 30 via a guide device 28.

The single, multi-filament yarn that is considered to be essentially which cannot be referred to as twisted or twisted indicate a twist or twist in the range between the value 0 and a maximum of half a turn per 2.5 cm of yarn length.

Within the bath, each individual yarn runs beneath a guide rod 34 which is arranged in a remote area Separation plates 36 carries. This ensures that the yarns within the bath from each other are kept separated at the same time with the help of the guide rod 34, around which the yarns are deflected the individual threads of the yarn are brought into a position in which the continuous impregnation of the Yarn with polymeric binder is guaranteed.

The tensioning device 26 serves to hold the yarns of the strip material lying directly next to one another 38 to balance and regulate their tension.

After being brought together to form the band material 38 and when the band material is being wound onto the winding mandrel 30, the yarns can still be moist, see above that the tape on the roll experiences a slight bond from layer to layer by drying, so that the Tape material reliably maintains its orderly position on the roll.

The soaking of the yarn in a bath 16 can can also be done in two stages or in a multiple immersion technique.

For Tränkup.g the yarns in the bath 18, the polymeric binding material in high concentration, i. H. in a concentration of at least 10 to 40 weight percent can be used.

The band-shaped reinforcing material 38 obtained in this way has a rectangular cross-section, its width at least twice, as a rule, however, several times the thickness of a single yarn matters. The width of such a strip material can be between 0.3 and 4 mm.

For this purpose 2 sheets of drawings

Claims (2)

Patent claims: 1. High pressure hose, the at least two coaxial tubular body made of a rubber material and a textile enclosed between these Has reinforcing insert made of a strip material, which consists of at least two in a common Flat and with mutual contact parallel yarns from each consists of several continuous threads and a polymeric binder with the two associated tubular body is firmly connected, characterized in that the im essential twisted or untwisted Yarns (32a to 32d) of the strip material (38} of the or each reinforcing insert (44, 48) in all cross-sections are completely impregnated with the polymeric binder up to the inside of the game, that essentially every single thread of the yarn is impregnated with the binder and that Yarn on dry matter of the binder an amount of at least 10% of the weight of the yarn having. 2. High pressure hose according to claim 1, characterized in that the binder content is 12 to 15% of the weight of the yarn.