JPH033114B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a reinforcement structure for the end of a flexible hose, and more specifically, it is flexible and can be used under a large tensile load. This invention relates to a reinforcement structure for the end of a flexible hose.

[Prior art]

Conventionally, in the manganese nodule mining system, as shown in Fig. 2, manganese nodules on the G surface of the seabed at a depth of about 5,000 meters are lifted up to a mining ship 23 by a pump 22 located in the middle of an ore lifting pipe 21, and then transported using a flexible hose. 24 is an ore lifting pipe 21 and an ore collector 25 due to changes in water depth, unevenness of the seabed G surface, changes in mining speed, etc.
The ore collector 25 absorbs the relative displacement of the mining ship 23.
It is pulled forward by the propulsive force of.

Therefore, negative pressure is applied to the inside of the flexible hose 24 (Δ20 to Δ30 Kgf/m ² from the outside of the hose).
There is a problem that the total length of the hose is 500 to 600 m,
Since the flexible hose 24 is connected with a single length of 10 to 20 m, tensile force is applied to the flexible hose 24. Therefore, the hose for the manganese nodule mining system was required to withstand the tensile load for towing the ore collector 25.

Incidentally, the flexible hose 24 has conventionally been broadly classified into several types of end structures depending on the purpose, size, etc., but none of them have a structure that cannot withstand a large tensile load.

That is, the flexible hose 24 is originally characterized by being flexible, and is also required to have pressure resistance, liquid (chemical) resistance, abrasion resistance, weather resistance, etc., but it has not conventionally been capable of pulling objects. . (Approximately the weight of the hose when it is suspended) Therefore, conventionally, hoses for applications where particularly large tensile loads are applied have not been manufactured.

Currently, several types of end structures have been adopted depending on the application to withstand pressure, but none can sufficiently withstand tensile loads.

The bandless type shown in Figures 3 and 4, which has traditionally been the most commonly used type,
A reinforcing layer 1 is fastened to the nipple between the nipple rings 2 by means of a wire 3. When a tensile force is applied to the reinforcing layer 1 having this shape, the reinforcing layer 1 at the bent part A shown in FIG. Uniformity occurs and efficiency is greatly reduced.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and its purpose is to provide flexibility, which is the original function of hoses, and to provide sufficient flexibility even when large tensile loads are applied. This provides a reinforced structure for the end of a flexible hose that can withstand

[Structure of the invention]

In order to achieve the above object, the present invention includes a fitting having a locking protrusion on the outer peripheral surface of the cylindrical part;
This flexible hose end reinforcement structure includes an end rubber reinforcement part in which a reinforcing layer is integrally wrapped around the cylindrical part of the fitting, and an embedded flange that engages with the locking protrusion. , a fixing fitting consisting of a bolt screwed into this embedded flange, a folded ring fixed to the tip of this bolt, the outer periphery of the ring embedded in the rubber layer of the hose body, and a cylindrical fitting fitting. and a reinforcing layer whose tip is inserted through the folded ring from the inside to the outside and folded back. The gist is that it is coated and integrally molded.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the accompanying drawings.

In the following explanation, the same components as those explained in the above conventional example will be described with the same reference numerals.

FIG. 1 shows a vertical cross-sectional view of the end structure of a flexible hose for tensile loads according to the present invention, and 11 is a nipple fitting (joint fitting 11), which is made up of a flange 12, a protrusion 13, and a nipple cylindrical part 14. It is configured.

Further, the reinforcing layer 15 is a rubber layer Q of the hose body H section.
It is wrapped around the outer periphery of the ring 16 embedded in the ring 16, and is then uniformly wrapped around the cylindrical part 14 of the nipple fitting 11 as it is.

The reinforcing layer 15 further includes the projection 1 of the nipple fitting 11.
It is folded back from the inside to the outside of a folding ring 19 whose position is fixed by a bolt 18 from an embedded flange 17, which is called a fixing fitting hooked on a fixing member 3, and furthermore, the top thereof is covered with rubber 20 and molded. It is vulcanized to form rubber reinforcements 21 at the ends.

With the above configuration, when axial tension is applied to the hose body H, the axial tension is absorbed by the axial component of the tension applied to the reinforcing layer 15 wound in alternating spirals.

Further, when tension is applied to the hose body H in the axial direction, a force to contract in the radial direction acts, and the body H is held down by the ring 16, and the end of the hose receives this force by the nipple cylindrical part 14.

Therefore, the reinforcing layer 15 tightens the nipple cylindrical portion 14, and as the tension increases, the tightening force also increases, so that the reinforcing layer 15 can be prevented from shifting due to frictional force.

Furthermore, the force that tends to move the reinforcing layer 15 in the axial direction is suppressed by the folding ring 19 whose position is fixed.

As described above, in transmitting the tensile force of the reinforcing layer 15 to the nipple fitting 11, since the reinforcing layer 15 is uniformly applied to the folded part, there is no concentration of stress, and the structure of the nipple fitting 11 is improved. It's relatively simple.

As mentioned above, the nipple fitting 11 has a cylindrical part 14 (without protrusions) with a length 3 to 6 times the nipple diameter near the hose main body H, and a reinforcing layer 15 wrapped around the main body ring. is extended and reaches this cylindrical portion 14 as it is.

The rings 16 of the main body are arranged at a constant pitch inside the reinforcing layer 15 so as to withstand the force that causes the diameter of the reinforcing layer to contract due to compressive force or tensile load caused by external pressure.

Furthermore, a folding ring 19 is arranged outside the end of the reinforcing layer 15 to fold back the reinforcing layer 15 from the inside, and the load is transmitted by the nipple fitting 11 through the bolt 18 → embedded flange 17 → protrusion 13, and the tensile load is It is also designed to withstand even more.

As described above, this invention is applied to a system for mining mineral resources (manganese nodules) in the deep seabed G. The gist is a reinforcing structure for the flexible hose used in between, and the pulling force for the ore collector 25 to travel on the seabed surface G is transmitted by the flexible hose. As a result, compared to conventional flexible hoses that could not withstand large tensile loads, the flexible hose of the present invention allows the ore collector 25 to be pulled by the flexible hose itself.

〔Effect of the invention〕

Since this invention is configured as described above, when tension in the axial direction is applied to the hose main body,
This axial tension is handled by the axial component of the tension applied to the reinforcing layers spirally wound in alternating directions, and when axial tension is applied to the hose body, a force that contracts in the radial direction acts, causing the main body to form a ring. The end of the hose can absorb this force with the nipple tube. As a result, the reinforcing layer tightens the nipple cylindrical portion, and as the tension increases, the tightening force also increases, which has the effect of preventing displacement of the reinforcing layer due to frictional force.

In addition, the force that tends to move the reinforcing layer in the axial direction can be suppressed by the folding ring whose position is fixed, and when transmitting the tensile force of the reinforcing layer to the nipple fitting, the reinforcing layer Since the reinforcing layer is uniformly applied to the entire part, there is no concentration of stress, and the reinforcing layer and the fitting can be reliably fastened by folding the reinforcing layer through the ring.

Furthermore, since the structure of the nipple fitting is relatively simple, it has the advantage that it can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the end of a flexible hose in which the present invention is implemented, Fig. 2 is an explanatory diagram of a conventional manganese nodule mining system, Fig. 3 is a sectional view of the end of a conventional flexible hose, and Fig. 4 is a partially enlarged sectional view of FIG. 3; 11... Fittings (nipple fittings), 13...
Projection, 14... Cylindrical part, 15... Reinforcement layer, 16...
... Ring, 17 ... Embedded flange, 18 ... Bolt, 19 ... Turning ring, 21 ... End rubber reinforcement section, H ... Flexible hose body, Q ... Rubber layer.

Claims (1)

[Claims] 1. A flexible hose end consisting of a fitting with a locking protrusion on the outer peripheral surface of the cylindrical part, and an end rubber reinforcement part in which a reinforcing layer is integrally wrapped around the cylindrical part of the fitting. The reinforcing structure includes an embedded flange that engages with the locking protrusion, a bolt screwed into the embedded flange, and a folding ring fixed to the tip of the bolt. It is composed of a metal fitting, and a reinforcing layer that is wrapped around the outer periphery of a ring embedded in the rubber layer of the hose body and the cylindrical part of the joint fitting, and whose tip is inserted into the folded ring from the inside to the outside and folded back. . A reinforcing structure for a flexible hose end, characterized in that a fixing fitting and a reinforcing layer are coated with rubber and integrally formed on the outer peripheral surface of a cylindrical portion of the fitting.