JPS5983515A - Duct circulating device - 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 an improvement of a simple ring device used for laying and burying submarine cables.

In general, in order to lay and bury submarine cables on the seabed, as shown in Figure 1, a device for laying and burying submarine cables (generally called a laying and burying machine (1)) and a towing boat (2) to tow it.
) as well as the guide ring (3) and towing wire (4) that connect the two.
) and a burial machine Using a system consisting of control signal wires (5), the submarine cable (6) is laid and buried through the guide ring (3).

Conventionally, this type of underground guide ring (3) has been designed to reduce the tension applied to the submarine cable as much as possible by distributing the weight of the submarine cable to a part of the cable guide ring (3). Compared to the case without a submarine cable, there is no guide ring (3
) to ensure that the material could be fed to the laying and burying machine. However, the conventional structure is heavy, and as the water depth for laying the cable becomes deeper, excessive tension is applied to the towing wire (4) due to the weight of the guide ring (3). was limited to. Also, as shown in Figure 2, the tow wire (4) is attached to a guide ring (4) along the catenary.
3) also changes the angle, so if the towing tension fluctuates, the guide rings (3) may come into contact with each other at points P and Q, causing damage to the guide rings (3). Furthermore, there are many contact points between the guiding ring (3), the submarine cable (6), the interrupter (8), and the connector passing through it, and the former passing through the guiding ring (3) may cause collisions. It is easy to cause damage, and the frictional force caused by their contact accumulates on the towing wire (4) fixed to the guide ring (3), leading to an increase in towing tension and moving the submarine cable (6) from the towing ship to the burial machine. This created a large amount of resistance when feeding.

In addition, as shown in Fig. 3, in order to take the conventional submarine cable (6) into the guide ring (3) or take it out of the guide ring (3), the guide ring (3) is (3A), (3B) was structured to be split in half. Therefore, there is a problem in that opening and closing operations take time, and furthermore, the structure and mechanism are complicated, making it difficult to reduce the weight. (
Power is a hanger. To fix the towing wire (4) to support the rough guide ring (3), a metal fitting (for fixing the guide ring (3) and the tow wire (4) between the plates is used as shown in Fig. 4). 9) in several places on the guide ring (3), but some of the guide rings (3) tend to put weight on them, so the lowermost guide ring (3) is fixed to the upper guide ring (3). The guide ring (3)
It was easy to bear weight. Furthermore, when storing the guide rings (3) after removing them, the guide rings (3) were stacked one on top of the other or placed side by side, but this required a lot of storage space and made the warehouse larger. There were drawbacks.

In order to eliminate the drawbacks of the prior art, the present invention has two fixed grips integrally equipped with plate-like grips on a part of both sides of the opening of a half tube and one helical type grip in a conduit intervening device. The openings of the two half-tubes of the fixed grips are arranged in the same direction with an interval between them.1. The spiral guiding ring is fixed in a spiral shape to the disposed fixed grip to constitute a spiral guiding ring device element member, and the spiral guiding ring device element member is fixed to the towing wire in a spiral shape. The towing wire is held by the half pipes of the adjacent fixing grips so that the guide ring strips are spirally arranged, and the towing wire is fixed by a locking device and disposed in order. It is characterized in that a spiral-type flash ring is supported on the burial machine control signal wire by one flexible loop hanger, and its purpose is to change the spiral-type simple conductor ring to a spiral shape to reduce weight. At the same time, it makes it easier to take out submarine cables, streamline installation work, and prevent damage caused by mutual contact between the elements of the cable guide system.Compared to conventional cables, it can be applied to a wider range of water depths and can be used stably. can be sent from a towing boat to a laying burying machine, thereby reducing the storage space for the cable guide device element members.

The present invention will be explained based on the drawings.

FIG. 5 is a perspective view of the line guide ring device of the present invention, and FIG. 6 is a perspective view of the line guide ring device element member (hereinafter referred to as element member) of the line guide ring device.

In the figures, the same reference numerals as in FIGS. 1 to 4 indicate the same parts and parts. In the figure, (R) indicates an element member, θQ indicates a spiral conductor ring, aυ indicates a fixing clip, α indicates a locking device, and 03) indicates a loop hanger.

The configuration of the guide ring device of the present invention will be explained.

The element part II' (R) consists of two fixing clips (111 and one spiral guide ring strip a1), and the fixing clip (1
The material for 1) is not limited to metal or synthetic resin, as long as it has enough strength to fix the helical lead ring, hold the towing wire, and support the submarine cable. The ring material is made of metal, FRP, reinforced plastic, or a composite thereof, and has strength and flexibility.

Fixed clip (Iυ is two plate-shaped body clips (11A)
If it is made of metal, it may be fixed by welding or the like, or it may be constructed as one piece from the beginning.

The element member (R) is formed of a plate-like clip (IIA) of a fixed clip αυ and a half tube ( IIB
) at the joint position by welding, gluing, etc. The loop hanger (13 is made of flexible material and has a loop shape.

In the present invention, a fixed grip aυ is inserted into a plurality of element members (R) from the side of the towing wire (4) as shown in FIG. Towing wires (4) facing each other of the wires (4)
The towing wire (4) is inserted from the side of the tube, and each half tube (IIB) section is arranged in order to hold the towing wire (4).
IB) is provided with a locking device UJ to connect the towing wire (4) and the fixed grip 0υ. On the other hand, a spiral-shaped guide ring strip 00) of the element member (R) is drawn by folding the loop hanger 03) into a U-shape, and a spiral-shaped guide ring strip 0■ is attached to the bottom of the U-shaped loop hanger αJ. Support, U-shaped loop no cigar 0
Insert the burial machine control signal wire (5) into the two rings at the top of 9.

The line guiding device of the present invention is constructed by connecting a required number of element portions 11(R) between the buried machine control signal wire (5) and the towing wire (4).

Next, an example of a locking device is shown in FIG. In this example, the fixed grip Ql) uses a locking device as one of its constituent members. Figure (A) shows a front view before locking, Figure (B) shows a locked state, and Figure (C) shows a bottom view.

In the figure, (12A) is a slightly stretchable band, (1
2B) is the metal fittings, (120) is the handle, (42cm1)
is the engagement part of the handle, (120-2) is the safety pin hole,
(12D) is the engagement hook part, (12K) is the safety pin, (
12F) indicates a rivet. Engagement hook part (12D)
, the safety pin (12E) may be provided later on the half portion (IIB).

The 0 side of the locking device in this example can be fixed and released with one touch. The locking device α can be configured separately from the half portion (IIB). Any clip may be used as long as it can easily fix the fixing clip αυ and the towing wire (4).

The loop hanger α→ is easily incorporated into the spiral guide ring O1, and the loop hanger α→ is configured to prevent a direct impact force from being applied to the burial machine control signal wire (5).

Fixed grip of element member (R) by locking device 0
υ and the towing wire (4) can be reliably connected, the element member (R) does not slip off from the towing wire (4), and the weight of the adjacent element member (R) is not applied to the lower stage side. Furthermore, since the tip of the fixed grip α1) has rounded corners, flexibility can be maintained between the fixed grips 01) even when the towing wire (4) is bent. In addition, even if the element member (r) is bent by 1 mm as shown in FIG. This prevents contact between the submarine cables (6) and the submarine cables (6
) and repeater (8), etc., has a structure that easily absorbs shock.

As explained above, the conductor ring device 4 of the present invention can be made lightweight by forming the element member into a helical structure, can prevent mutual contact between the helical conductor ring members, and furthermore, It can have the function of absorbing the collision shock caused by the submarine cables, repeaters, and connectors passing through the element member sliding down while colliding with the inner wall of the element member. In addition, the work of taking out and taking out the submarine cable into the element member can be easily and reliably performed by providing a fixing grip and a locking device to connect the element member and the towing wire.

The present invention has the above-mentioned configuration, which makes it possible to expand the applicable water depth of the submarine cable in laying and burying submarine cables consisting of a towing boat, a guiding device, and a laying machine, and also allows the submarine cable to be safely towed by the submarine cable. This has the advantage that it can be fed from the ground to the laying and burying machine.

The cable guiding device of the present invention can be applied not only to submarine cables, but also to laying and burying other cables such as electric cables and communication cables. Also, there is no need for a laying/burying machine.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional guide ring, Figure 2 is an illustration of contact damage in a conventional guide ring, and Figure 3 is a structural diagram of a conventional guide ring.
@Figure 4 is an enlarged view of the fixing jig in Figure 3, which explains the conventional method of fixing a guide ring, Figure 5 is an embodiment of the guide ring device of the present invention, and Figure 6 is a similar fixing jig for a guide ring. FIG. 7 is a perspective view of the ring device element member of the ring device, FIG. 7 is a plan view showing a fixed state of the ring device element member of the present invention and the towing wire, and FIG. 8 is a locking device,
(A) is a front view of the state before locking, (B) is a front view of the locked state, (C) is a plan view of (B), and FIG. 9 is the guide ring device of the present invention. An explanatory diagram of a guide ring between adjacent spiral molds of element members is shown. 1: Laying/burying machine 2: Towing boat 3: Conventional guide ring 4: Towing wire 5: Burying machine control signal wire 6: Submarine cable 7: Hanger 8: Repeater 9: Fixing metal fittings R: Guide ring device element Member 1O: Spiral-shaped Liu-gui ring 11: Fixed grip 11A: Plate grip 11B; Half-split pipe 1:
Locking device 13; Loop hanger patent applicant Nippon Telegraph and Telephone Corporation

Claims (1)

[Claims] A towing wire for towing the underwater cable laying and burying machine and a burial machine control signal wire are connected between the underwater cable laying and burying machine and a towing boat, and a plurality of guide rings are connected to the towing wire and the burial machine control signal wire. In the guide ring device equipped with
It consists of two fixed grips that are integrally equipped with plate grips on a part of both sides of the opening of the half pipe, and one spiral-shaped power ring. The openings of the half pipes are arranged at intervals in the same direction, and the helical guide ring is fixed to the disposed fixed grip in a spiral shape to form a working guide ring device element member. wherein the towing wire is held and locked by a half tube of the fixed grip that is in contact with the towing wire so that the helical lead ring of the towing ring device element member is in continuous spiral shape. The spiral guide ring strips of the intervening ring guide device element members are fixed with a device and arranged one after the other.
A guide ring device comprising a flexible loop hanger supporting the buried machine control signal wire.