JPS5915249B2 - Braking guide tube unit for long objects to be delivered underwater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an underwater pay-out long body used to apply a brake to the long body paid out into the sea from a laying ship when laying a long body such as a submarine cable or water pipe on the seabed. This invention relates to a braking guide tube unit for a body.

When the water depth reaches around 100,077 L, the tension applied to the long body becomes extremely large due to the increase in its own weight as the length of the long body being brought out into the sea increases. In the case of cables, the track-type brake systems currently installed on cable-laying vessels cannot withstand this increase in tension, so such deep-sea cable laying work is not carried out.

An object of the present invention is to provide a braking guide pipe unit for an elongated body to be delivered under the sea, which allows the elongated body to be installed not only in shallow seas but also in deep seas.

The braking guide pipe unit for an elongated object to be fed out under the sea according to the present invention has a control box and a two-part structure, and the center of the opposing inner surfaces in the width direction contacts the surface of the elongated object to apply a brake. The control box is characterized in that it includes a flexible brake bag housed in the control box, each of which has an elongated brake passage consisting of a groove forming a groove.

Such a braking guide tube unit for a long object to be paid out under the sea according to the present invention is constructed by connecting a plurality of these to form a braking guide tube and suspending it from a laying ship into the sea, passing the long object through it, and connecting each unit. Since the built-in brake bag applies the brakes to the long body, even when a large braking force is required, the required braking force can be easily obtained because the number of units can be set freely because it is underwater. Even deep-sea installation of heavy long bodies can be easily carried out.

Further, when a brake bag is used, the braking force can be easily adjusted by adjusting the pressure of the brake bag.

Further, since the brake bag is housed in the control box, it can be protected from external forces, and the brake bag can be prevented from expanding outward, allowing effective generation of braking force.

Moreover, when using a brake bag divided into two parts, when passing through a large diameter part such as a connecting part of a long object, the inner diameter of the brake bag can be expanded by removing air from the brake bag, and the large diameter can be easily expanded. can be passed through.

Also, if you use a brake bag to apply the brakes, unlike track-type brake equipment, inertia does not work,
This has the advantage that the responsiveness of brake control becomes faster, and its buffering action can prevent damage to the surface of the elongated body.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The braking guide pipe unit 1 of this embodiment is shown in FIG.
, B to FIGS. 3 A and H, it has a vertically elongated control box 2 that is divided into two parts, and this box is formed so that seawater can freely enter and exit through pipes, and its split surface 3 has a hinge. 4 and a bolted opening/closing connector 5 so that they can be opened and closed.

A wire mesh 6 such as expanded metal is stretched around the outer periphery of the control box 2.

The hinge 4 and the bolted opening/closing connector 5 are formed with a tow hole 7.8 for holding a tow rope, which will be described later.

Inside the control box 2, a pair of upper and lower brake bags 9 having a flexible two-part structure made of neoprene rubber or the like is housed.

An elongated body brake passage 10 is formed in the widthwise center of the opposing split surfaces of these brake bags 9 and is formed of a flexible groove that contacts the surface of the elongated body to perform a braking action, which will be described later. There is.

Further, each of these brake bags 9 is formed with an air supply/exhaust port 11 .

In particular, the brake bag 9 is made thicker by providing unevenness in the portion where the elongated brake passage 10 is formed, in order to strengthen the brake passage 10.

Further, within the control box 2, lifting plates 12 are disposed on both sides in the width direction, and are in contact with opposing surfaces of the respective brake bags 9, respectively.

These elevating plates 12 are supported by guide rods 13 fixedly installed at the front and rear corners of the control box 2 so as to be able to rise and fall freely, and each brake bag 9 is supported by a spring 14 supported by each guide rod 13. are biased in the direction of separating them from each other,
These elevating plate 12, guide rod 13, and spring 14 constitute a brake bag compression mechanism 15 that compresses each brake bag 9 when not in use.

An example of the usage state of the braking guide pipe unit 1 of the present invention will be explained with reference to FIGS. 4 and 5. FIG.

As shown in the figure, the elongated body 17 loaded on the laying ship 16 is sent out into the sea via a track brake device 18 and laid on the seabed 19.

A braking guide pipe 21 formed by connecting a plurality of the above-mentioned braking guide units 1 with a tow rope 20 is suspended from the laying ship 16 into the sea.

The brake bags 9 in each unit 1 are communicated from front to back through a communication pipe 22, and the brake bag 9 at the proximal end is connected to an air compressor 24 via a communication pipe 23 to inflate each brake bag 9. There is.

The towline 20 is pulled by a winch 25 mounted on the laying ship 16.

As shown in FIG. 4, the elongated body 17 is passed through the braking guide pipe 21 and fed out to the seabed 19 side.

When the water depth is relatively shallow, the brake bag 9 is not inflated (at this time, the brake bag 9 is compressed by the brake bag compression mechanism 15 and contracted as shown in FIG. 1A).

This braking guide tube 21 is simply used as a guide tube for the elongated body to feed out the elongated body 17.

In this case, the necessary braking force is provided by a brake device 18 on the construction vessel 16.

When the water depth becomes deeper and more braking force is required, a compressor 24 sends air into each brake bag 9 to inflate it and press the elongated body 17 to generate a braking force.

The braking force can be freely adjusted by adjusting the pressure of each brake bag 9.

Further, when passing through the large diameter portion of the elongated body 17, the air is slightly removed from each brake bag 9 to enlarge the inner diameter and the body is allowed to pass through.

In the above embodiment, the braking guide pipe 21 has been described as being used in deep water, but it may also be used in place of the brake device 18 on the laying vessel 16 even in relatively shallow water.

As explained above, the braking guide pipe unit of the present invention is constructed by connecting a plurality of these pipes to form a braking guide pipe, which is suspended into the sea from a construction ship, and through which a long body is passed, and which is connected to a brake built in each unit. Since the brake is applied to a long body using a bag, even if a large braking force is required, since it is underwater, the number of units can be freely increased and the length of the braking guide tube can be freely set, so it is easy to use. It is possible to obtain a braking force of 100%, and it is possible to easily install a heavy long body in deep sea.

Further, in the present invention, since a brake bag is used, the braking force can be easily adjusted by adjusting the pressure of the brake bag.

Furthermore, since each brake bag is housed in the control box, it can be protected from external forces, and the brake bags can be prevented from expanding outward, allowing effective generation of braking force.

In addition, when using a brake bag divided into two parts, when passing through a large diameter part such as a connecting part of a long object, the inner diameter of the brake bag can be expanded by removing air from the brake bag, and the large diameter part can be easily expanded. can be passed.

Also, if you use a brake bag to apply the brakes, unlike track-type brake equipment, inertia does not work,
This has the advantage that the responsiveness of brake control becomes faster, and its buffering action can prevent damage to the surface of the elongated body.

[Brief explanation of the drawing]

Figures 1A and B are front and side views of an embodiment of the braking guide tube unit according to the present invention with the wire mesh removed, and Figures 2A and B are front views of the same unit with the wire mesh attached. View and side view, Figure 3A. B is a front view and a side view of the brake bag used in the same unit, and FIG. 4 is an explanation showing an example of a method for laying a long body on the seabed using a braking guide pipe formed by connecting units of the present invention. 5 is a longitudinal sectional view of the braking guide pipe shown in FIG. 4. DESCRIPTION OF SYMBOLS 1... Braking guide pipe unit, 2... Control box, 9... Brake bag, 10... Long body brake passage, 11... Supply/exhaust port.

Claims (1)

[Claims] 1 A control box and an elongated body brake passage consisting of a groove that contacts the surface of the elongated body and performs a braking action in the center of the width direction of the inner surfaces facing each other, each having a two-part structure, and providing the control box. A braking guide tube unit for a long object to be delivered underwater, comprising a flexible brake bag housed in a box.