JPS58102890A - High-pressure hose - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-pressure hose having two reinforcing layers made of spirally wound steel wire.

It is a well-known fact that a high-pressure hose having a reinforcing layer made of spirally wound steel wire can be manufactured as long as the number of reinforcing layers is two or more. Although hoses with three or more reinforcing layers of steel wire have actually been manufactured and used, hoses with a two-layer structure have not been used. In the impact pressure test, a hose with two reinforcing layers:
Since there is no binding property, the wire spacing expands due to repeated impacts, and eventually the reinforcing layer does not break and the im layer breaks down, resulting in poor impact resistance and weak steel wire, which plays a role as a reinforcing layer. It had the drawback of not being able to fulfill its goals. A hose with three reinforcing layers has poor binding properties even after repeated impact, so the wire spacing does not widen, and it functions satisfactorily, but the manufacturing process is complex and requires advanced manufacturing technology. However, there were also disadvantages such as the hose becoming heavier.

Therefore, an object of the present invention is to simplify the manufacturing process and reduce the weight of the hose by increasing the number of spiral reinforcing layers of the steel wire to two so that the reinforcing layer wire does not spread due to impact pressure. There is a spiral steel wire reinforcement layer that can be used to provide a two-layer high pressure hose.

According to the invention, a spiral reinforcing layer of steel wire is provided on the inner layer of the drum. In a pressure hose formed by winding in two layers and covering the outside with a tm outer 1- layer, 50 strands of wire are wound at 20 Kp between the two spiral reinforcing layers.
The above object can be achieved by interposing an im layer made of an im material of /cdi or more with a thickness that is at least such that the two steel wire reinforcing layers do not come into contact with each other.

Next, a preferred embodiment of the high-pressure hose according to the present invention is illustrated in the accompanying drawings and will be described in detail.

The pressure control hose of the present invention is shown in FIG. 1 in a partially cutaway perspective view, and in FIG. 2iJ in a sectional view. In the figure, l is the inner layer of the coil, 2 is the first spiral steel wire reinforcing layer, 3 is the intermediate layer, 4 is the second spiral steel wire reinforcing layer, and 5 is the outer layer of the coil. be. The inner layer l is made of an oil-resistant and water-resistant material. Steel wire wire single layer 2 and 4
are formed by winding steel wires of appropriate thickness in opposite directions at desired angles. The intermediate layer 3 is made of a material that prevents contact abrasion of the steel wires of the reinforcing layers 2 and 4 and has good adhesion to the wires. Mokuyuras 2011 p/c
s1 or more)'i The thickness of the reinforcement layer 2 and 4 can be prevented from contacting the ls4 contact wires, that is, about 0.2 to 1. It is preferable to have a wall thickness of about oIIB. The rubber outer layer 5 is made of an im material that is highly weather resistant and wear resistant.

Hereinafter, examples of the present invention will be given and concretely explained while comparing with comparative examples.

[Example 1, 2. Comparative Examples A, B] Wall thickness 1.81B, inner diameter 25.411mm) N with high oil resistance
The inner layer of the wire using BR type wire wire is 54 degrees 45 degrees to the left with respect to the center axis of the steel wire wire with a wire diameter of 0.5 mm.
A first spiral reinforcing layer is formed by winding at an angle approximating .
OR system t with good adhesion to 3KP/cd steel wire
An intermediate rubber layer with a thickness of 0.3 mm is provided, and a steel wire with a wire diameter of 0.511 is placed on top of it at an angle approximating 54°45' to the right with respect to the central axis of the hose. A second spiral reinforcing layer is formed by winding the reinforcing layer.Finally, a rubber outer layer is coated on the second reinforcing layer using a CR-based im material with excellent weather resistance and abrasion resistance.In this way, an inner diameter of 25.4 JOB is formed. got a hose.

In addition, as a comparative example A, a hose similar to the above example was used except that the intermediate im layer was composed of an im material with a 50 thymodilous content of 15 Kp/cdl, and as a comparative example B, a hose similar to that of the above example was used, except that the intermediate im layer was made of an im material with a 50 thymodullus content of 9 KP/cdl. Hoses similar to those in the above example were manufactured except that they were made of CR-based im material that has good adhesion to steel wire, and these hoses were
An impact pressure test was conducted in accordance with JIS K6365. The results are shown in Table 1. In Table 1, "reinforcement layer failure" refers to the normal failure of the hose due to the destruction of the reinforcement wire layer, and "structural failure" refers to the normal failure in which the hose is destroyed due to the reinforcement wire layer being destroyed.Structural failure refers to the case where the distance between the reinforcement wires increases and the im layer is destroyed without the reinforcement layer being destroyed. T-gu-
It means abnormal destruction leading to a strike.

Table 1 [Example 3. Comparative Examples C, D) Highly oil resistant NB with a wall thickness of 1.6 Wa and an inner diameter of 12.71 mm.
Wrap it around the inner layer of the rim made of R-type TM material at an angle approximating 54° 45' to the left with respect to the center axis of the hose, which is a steel wire wire with a wire diameter of 0.4 mm. A 4-ral reinforcement layer is formed, and 50%% duras is 25Kf/25Kf/
An intermediate layer with a thickness of 0.4 IJ& is made using NBR type material that has good adhesion with C+D steel wire, and on top of that, a steel wire with a wire diameter of 0.5 ml is placed against the center axis of the hose. A second spiral reinforcing layer is formed by wrapping it in the right direction at an angle approximating 54°45', and finally, a CR-based Coco9m material with excellent weather resistance and abrasion resistance is used on this second reinforcing layer. coat the outer layer, thus making the inner diameter 12.7JEI
got a hose.

In addition, as Comparative Example C, the same hose as in the above Example was used except that the intermediate TM layer was made of an im material with 50% mosoyuras of 181 ip/cd, and as a comparative example, the intermediate im layer was made of an im material with 50% mosoylus. 119/cd J) Hoses similar to those in the above embodiments were manufactured except that they were made of NBR-based comb material that has good adhesion to steel wires, and the hoses of Examples 1 and 2. ! : Similar test was conducted. The results are shown in Table 2.

Table 2 shows the above examples and comparative examples. The results of the impact pressure test on the hose are shown in the graph of FIG.

The passing standard is 400,000 times in a test based on JIS K 636-6.-6. :,/) From the graph, the 50% modulus of the intermediate layer of the hose that should pass is 20 Kp/
It is clearly understood that c1 or higher is sufficient.

As is clear from the above explanation, as in the present invention, the number of reinforcing layers can be increased by interposing an intermediate layer having a thickness of 50 Kp/04 or more between the spiral reinforcing layers of the steel wire. can be reduced to two layers instead of the conventional three layers, and this
It is possible to simplify the manufacturing process and reduce the weight of the hose, and at the same time, the inner and outer surfaces of the hose can be made smoother than those of conventional hoses, which has great practical effects.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of the high pressure hose of the present invention, Fig. 2 is a cross-sectional view of the same, and Fig. 3 is a 5-5 mm cross-sectional view of the im material of the intermediate column 9 layer.
It is a graph showing the relationship between 0 timidulus and the number of impact pressures. Explanation of symbols

Claims (1)

[Claims] In a high-pressure hose formed by winding two spiral reinforcing layers of steel wire on the inner layer of the rim, and covering this with the outer layer of the rim, the 50% modulus between the two spiral reinforcing layers of the steel wire is 20. A high-pressure hose characterized by interposing a dem layer made of a dem material having a Kp/c1 or more with a thickness such that at least both vsm wire reinforcing layers do not come into contact with each other.