JPS5949465B2 - high pressure hose - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-pressure hose, and more particularly, to an improvement in a high-pressure hose having a plurality of spiral wire reinforcement layers and a prickly puffer hole on the outer surface.

Conventionally, this type of high-pressure hose G, as shown in FIG. , and is configured so that the gas that has passed through the inner tube 1 can be released to the outside world through the prickly puffer hole 5.

However, in the conventional high-pressure hose G, the constituent wires 2a of the spiral wire reinforcing layer 2 are densely packed as shown in the figure, and 88 to 97 inches of the surface area of the spiral wire reinforcing layer 2 are made of metal wires 2a. Since 4 to 6 layers are stacked, the passage of gas that has passed through the inner tube 1 is significantly inhibited, and the gas accumulates between each layer of the high-pressure hose G.

This phenomenon is particularly noticeable between the inner tube 1 and the first spiral wire reinforcing layer 2□ adjacent thereto, and the accumulated gas causes the inner tube 1 and the first spiral wire reinforcing layer 2□ to separate. However, there is currently a problem that the inner pipe 1 in this portion may be damaged due to repeated internal pressure fluctuations within the high pressure hose G.

The present invention was developed as a result of studies to solve the above-mentioned problems.

Therefore, an object of the present invention is to prevent the gas from accumulating between the layers constituting the high-pressure hose by devising the structure of the spiral wire reinforcing layer so that the gas that has permeated through the inner tube can easily pass through. An object of the present invention is to provide an excellent high-pressure hose that can prevent delamination, inner tube damage, etc.

That is, the present invention provides a high-pressure hose in which a plurality of spiral wire reinforcing layers are laminated on the outer periphery of an inner tube via an intermediate layer, and the outermost layer has a prickly puffer hole. The gist of the present invention is a high-pressure hose characterized by having an air permeable cord arranged at at least one location per hose.

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

Fig. 2 is an explanatory front view with a part cut away of a high pressure hose according to an embodiment of the present invention, Fig. 3 is an enlarged front view of a longitudinal section including the same axis, and Fig. 4 is a perspective view with a part cut away of the same. FIG. 5 is a partially cutaway front view explanatory view showing the manufacturing process of the same.

In the figure, E is a high pressure hose made of an embodiment of the present invention.
A plurality of spiral wire reinforcing layers 20 are provided on the outer periphery of the inner tube 10.
are laminated with an intermediate layer 30 in between, and furthermore, prickly puffer holes 50 are provided at intervals on the outer circumferential surface of the outermost layer 40. In particular, in the present invention, each spiral wire reinforcing layer 20 includes: In the wire unit lead 20a' which constitutes this, a cord 21 having air permeability is disposed at at least one location.

To further explain this structure, the inner tube 10 is made of a rubber material that can withstand the fluid flowing inside, and the first spiral wire reinforcement of the spiral wire reinforcement layer 20 described above is provided on the outer periphery of the inner tube 10 with a reinforcing cloth 11 interposed therebetween. A layer 20□ is provided.

The reinforcing cloth 11 has this first spiral wire reinforcing layer 2
0□ is provided in order to prevent digging into the inner tube 10 or uneven thickness of the inner tube 10 during the manufacturing process of the present high-pressure hose E.

Further, on the outer periphery of the first spiral wire reinforcing layer 201 described above, as illustrated in the present embodiment, second to fourth spiral wire reinforcing layers 20□ are provided.

203 and 204 are laminated through an intermediate layer 30, and a breathable braided layer 60 is provided on the outer periphery of this fourth spiral wire reinforcing layer 204 through an intermediate layer 30. The outer periphery of the braided layer 60 is covered with the outermost layer 40, and the outermost layer 40 is provided with a large number of blinking holes 50 at intervals, leading to the breathable braided layer 60.

In this embodiment, each spiral wire reinforcing layer 20 includes:
As shown in FIG. 3, three breathable cords 21 are arranged per wire unit lead 20a constituting this.

That is, in this embodiment, the wire unit lead 20a includes a total of 15 steel wires a and 5 steel wires a between these 8 wires.
It is composed of a total of three breathable cords 21 arranged every other book.

Here, the above-mentioned wire unit lead 20a refers to the wire a and the breathable cord 21 arranged in the above-mentioned manner as one unit when forming each spiral wire reinforcing layer 20 in the process of manufacturing the present high-pressure hose E. This refers to a bundle of wire a and breathable cord 21 that forms spiral wire reinforcing layer 20 by spirally winding it around the outer periphery of inner tube 10, as shown in FIG.

Further, it is preferable that the diameter of the above-mentioned breathable cord 21 is 5 to 50 times larger than the diameter of the wire a.

This is because when each spiral wire reinforcing layer 20 is laminated as described above, the breathable cord 2 has a larger diameter than the wire a.
1 protrudes from the spiral surface of the wire a and allows the breathable cords 21 of adjacent spiral wire reinforcing layers to come into contact with each other or through an intermediate layer that is thinner than the intermediate layer of other parts, The passage of the gas that has passed through the inner tube 10 can be made easier.

Furthermore, the above-mentioned breathable cord 21 is not only fibrous, but also has a function that allows gas to pass through, such as a thin steel wire braided cord or a specially processed Teflon cord (which allows gas to pass through but not liquid). Any material may be used as long as it is a certain material, but in the process of applying the spiral wire reinforcing layer 20 during the production of high pressure hoses,
Since the cord 21 is spirally applied at the same time as the steel wire a, the cord 21 is also subjected to the same tension as the wire a, so a cord with high tensile strength is preferable.

In addition, since this cord 21 is installed on the same plane as the reinforcing wire a, cords with extremely high cutting elongation or low tensile strength may reduce the pressure resistance of the high-pressure hose.
Since this may lead to a decrease in impulse resistance, a cord having gas permeability and reinforcing elements is preferable, and a twisted cord made of aromatic polyamide fiber is particularly suitable.

The braided layer 60, which has the effect of preventing breakage of the wire a due to contact between the intermediate layer 301d and each spiral wire reinforcing layer 20, and has air permeability, passes through the inner tube 10 and is connected to each spiral wire reinforcing layer. The outermost layer 40 serves to collect the gas that has passed through the hose 20 and efficiently release it to the outside through the blinking hole, and furthermore, the outermost layer 40 protects the high pressure hose E from external conditions.

Next, Table 1 shows the results of durability experiments using the conventional high pressure hose G shown in FIG. 1 and the high pressure hose E of the present invention shown in FIGS. 2 to 4.

In the experiment, a pressure gauge with a normal pressure of 210 K9f/d and a diameter of 19 was used.

゛The experimental method was to seal 9fA-Il in 50% nitrogen gas in a hose, and to inject 60% of Solipul oil with 5% solution of water and 95% water.
Pressure was applied repeatedly at a pressure sign of 0 after a pressure of 210 ψd per second.

The temperature at this time was 80°C.

As is clear from Table 1, the high-pressure hose E of the present invention can easily release the gas that has passed through the inner tube to the outside world,
Durability can be significantly improved compared to conventional high pressure hoses.

As described above, the present invention provides a high-pressure hose in which a plurality of spiral wire reinforcing layers are laminated on the outer periphery of an inner tube with intermediate layers interposed therebetween, and the outermost layer has a prickly puffer hole.
Since a breathable cord is arranged at at least one location per wire unit lead constituting the spiral wire reinforcing layer, the gas that has permeated through the inner tube can easily pass through the breathable cord arranged in each spiral wire reinforcing layer. Since it can pass through the hose, it can be easily released to the outside world, and its durability can be significantly improved compared to conventional high-pressure hoses.

Therefore, the high-pressure hose of the present invention can be used extremely effectively as a hose for distributing fluids containing gas or fluids that are easily vaporized, or as piping for gases.

[Brief explanation of the drawing]

Fig. 1 is an enlarged vertical cross-sectional front view including the axis of a conventional high-pressure hose, Fig. 2 is a partially cutaway front view explanatory view of a high-pressure hose according to an embodiment of the present invention, and Fig. 3 is an enlarged front view of a conventional high-pressure hose including the axis. FIG. 4 is an explanatory diagram showing a partially cut away perspective view of the same, and FIG. 5 is an explanatory partially cut away front view showing the manufacturing process of the same. 10... Inner tube, 20... Spiral wire reinforcement layer, 20a... Wire unit lead, 2
1... Cord with breathability, 30...
・Middle layer, 40... Outermost layer, 50...
・Pritski puffer hole.

Claims (1)

[Claims] 1. In a high-pressure hose in which a plurality of spiral wire reinforcing layers are laminated on the outer periphery of the inner tube via an intermediate layer, and the outermost layer has a prickly puffer hole, at least one location per wire unit lead constituting the spiral wire reinforcing layer. A high-pressure hose characterized by having a breathable cord placed inside.