JPH0613547Y2 - Cable laying equipment with cable braking device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cable laying facility mainly used for a submarine cable laying ship, and particularly to a backup device or a cable stopper when the cable holding force of a tire type cable engine is insufficient. The present invention relates to a cable laying facility equipped with a cable braking device used as.

[Conventional technology]

In conventional cable laying equipment, the cable is laid while the tire type cable engine feeds the cable, but the cable is equipped with a cable braking device that is used as a backup device when the cable holding force of the cable engine is insufficient. Laying equipment has not been developed.

[Problems to be solved by the invention]

By the way, when laying a cable with a tire-type cable engine and a cable tension exceeding the capability of the tire-type cable engine is applied, once slip occurs between the tire and the cable, the ship speed is reduced. Unless you take measures to reduce the cable tension, the slip will not stop.

Then, there is a problem that the cable is unwound more than necessary while the slip occurs.

Therefore, when a slip occurs, there is a need for equipment that prevents the slip without lowering the boat speed and enables proper cable laying.

In addition, when the cable is under tension from the sea side when the ship is stopped, a device is also required to hold the cable so that the cable does not escape to the sea side.

The present invention is intended to meet such a request,
A cable with a cable braking device that allows the cable to be laid efficiently by applying appropriate braking to the cable to prevent slips if a cable tension greater than the cable holding force of a tire-type cable engine is generated. The purpose is to provide laying equipment.

[Means for solving problems]

Therefore, the cable laying equipment with a cable braking device of the present invention is a tire type cable engine capable of feeding out the cable while gripping the cable between a plurality of tires.
A cable braking device installed near the cable engine so that the cable can be braked, a tire speed detecting means for detecting a speed of sending out the cable of the tire, and a feeding speed of the cable are detected. Cable speed detecting means, which receives the detection signal from the tire speed detecting means and the detection signal from the cable speed detecting means to calculate the slip ratio of the cable with respect to the tire, and the slip ratio and the slip ratio set value. And a control system for activating the cable braking device when the slip ratio exceeds the slip ratio set value based on the processing result in the data processing board. Is characterized by.

In the above-described embodiment of the device of the present invention, a cable braking device is installed on the bow side or the stern side of the tire type cable engine as a backup device for the tire type cable engine, and the cable tension, the cable speed and the tire speed during cable laying are measured. A control system is provided which detects and activates the cable braking device when the cable tension and the cable slip ratio exceed set values.

[Action]

In the cable laying equipment with the cable braking device of the present invention,
When laying the cable, the cable braking device takes part of the cable tension applied to the tire-type cable engine, and if the cable tension exceeds the capacity of the tire-type cable engine, the slip ratio of the cable to the tire is set as the slip ratio. If the value is exceeded, the cable braking device is actuated to prevent slipping between the tire and the cable.

Further, when the ship is stopped, the cable braking device holds the cable so that the cable does not escape to the sea side.

〔Example〕

A cable laying facility with a cable braking device as an embodiment of the present invention will be described below with reference to the drawings.
FIG. 4 is a schematic diagram showing the overall configuration, FIGS. 2 and 3 are perspective views showing specific examples of the crimping plate and fixing plate, FIG. 4 is a system diagram of its control system, and FIG. It is a block diagram of a control system.

As shown in FIG. 1, a tire type cable engine 1 is provided on a submarine cable laying ship so that the cable 16 can be fed while gripping the cable 16 between a plurality of tires 2 driven by the power of the tire type cable engine 1. It has become.

A cable braking device 4 capable of braking the cable 16 is provided at a position close to the cable engine 1.

The cable braking device 4 crimps the cable 16 on the cable guide fixing plate 5a with the vertically movable crimp plate 5, and brakes the cable 16 by the frictional force between the fixing plate 5a and the crimp plate 5 and the cable 16. It is structured so that it can be slid while hanging.

The crimping plate 5 is vertically driven by an air cylinder 6 supported by a frame 7, and the crimping force can be controlled by changing the air pressure supplied to the air cylinder 6 through a pipe 8.

In the case of automatic operation, the speed of the tire 2 for sending out the cable 16 is detected by the tire speed detector 3 interlocked with the tire 2, and the payout speed of the cable 16 is detected by the pinch roller 17 as a cable speed detecting means. Then, the detected signals are processed and calculated in the data processing board 19 by the following equation, and the actual slip ratio is calculated.

Further, the deviation between the actual slip ratio and the set value of the slip ratio setter 21 is calculated by the data processing board 19 (see FIG. 5).

When the slip ratio exceeds the slip ratio set value as a result of this calculation, the solenoid valve 1 of the operation box 13 is sent by a signal from the relay board 20 connected to the data processing board 19.
5 and the solenoid valve 10 of the compressed air panel 9 operate, and the cable braking device 4 automatically operates.

If the slip ratio does not drop below the set value even if the cable braking device 4 operates, the set pressure of the pilot pressure adjusting valve 14 (see FIG. 4) of the operation box 13 automatically rises and the air cylinder 6 Working air pressure rises. When the slip ratio becomes equal to or less than the set value, the crimping plate 5 of the cable braking device 4 is opened.

Similarly, the actual tension signal of the cable 16 from the dynamometer 18 and the setting signal of the tension setter 22 are compared in the data processing board 19 (see FIG. 5).

Then, as a result of this comparison, if the actual tension signal becomes larger than the set tension signal, the cable braking device 4 is activated by the signal from the relay board 20.

If the slip ratio of the cable 16 to the tire 2 does not decrease even if the cable braking device 4 operates, the operating air pressure of the air cylinder 6 automatically increases. Cable 16
If the actual tension of the cable falls below the set tension, the cable braking device 4
The crimping plate 5 is opened.

In the case of manual operation, by operating the operation box 13,
The solenoid valve 10 of the compressed air panel 9 operates via the wiring 12, and the air cylinder 6 operates via the pipe 8. The working air pressure of the air cylinder 6 is controlled by adjusting the pressure setting of the pressure adjusting valve 11 of the compressed air panel 9 with the pilot pressure adjusting valve 14 of the operation box 13.

The pilot pressure adjusting valve 14 (see FIG. 4) is used to set the operating pressure in two stages, and the solenoid valve 15 is operated by operating the operation box 13 to control the operating air pressure of the air cylinder 6 to either of the above two stages. can do.

If the tire laying cable engine 1 is not used and the cable laying work is interrupted to perform other work, the cable 16
So that the same cable 16 does not escape to the sea side due to its own weight,
The cable 16 is crimped by the crimping plate 5, and thus the cable 16 can be held.

As the material of the crimping plate 5 and the fixing plate 5a, natural rubber, urethane rubber, iron or the like is used and can be replaced depending on the use conditions.

Since natural rubber has a high friction coefficient, a large holding force can be obtained when it is used for the crimping plate 5 and the fixing plate 5a, but since the heat transfer coefficient is small, when the cable 16 is slid and used, the cable 16 and the natural rubber are The frictional heat generated between
Since the temperature of the natural rubber rises and the coefficient of friction decreases, it is suitable when the cable braking device 4 is used alone as a stopper device.

Further, although iron has a lower coefficient of friction than rubber, it has a large heat transfer coefficient. Therefore, even if the cable 16 is used while sliding in conjunction with the tire-type cable engine 1, there is almost no effect of heat and the iron is constant. Holding power is obtained.

Urethane rubber is located between natural rubber and iron, and has the advantage that it generates less heat and retains more force than iron up to a certain cable speed.

The crimping plate 5 and the fixing plate 5a are structured as shown in FIGS. 2 and 3, and when they are made of natural rubber or urethane rubber, they are perpendicular to the traveling direction of the cable 16 as shown in FIG. Several grooves are provided in the direction so that heat can easily escape.

The inlet and outlet of the crimping plate 5 and the fixing plate 5a are connected to the cable 1
6 is rounded so as not to damage it.

Next, when the crimping plate 5 and the fixing plate 5a are made of iron, since they are not deformed as compared with the case of rubber, as shown in FIG.
The friction surface with the cable 16 has a V shape that allows a large contact area.

[Effect of device]

According to the cable laying facility with the cable braking device of the present invention, the following effects and advantages can be obtained.

(1) When laying a cable, a cable tension exceeds the capability of the tire-type cable engine, causing a slip between the tire and the cable, and when the slip ratio exceeds the slip ratio set value, the cable braking device is activated. By providing a control system, the slipping of the cable can be accurately prevented, which eliminates the waste of feeding the cable more than necessary and eliminates the need to reduce the boat speed when the cable slips as in the past. The cable laying work can be performed efficiently and safely.

(2) The cable can be held by the cable braking device so that the cable does not escape to the sea side due to its own weight when the ship is stopped.

[Brief description of drawings]

1 to 5 show a cable laying facility with a cable braking device as an embodiment of the present invention. FIG. 1 is a schematic diagram showing the entire structure thereof, and FIGS. 2 and 3 are all crimping thereof. FIG. 4 is a perspective view showing a concrete example of a plate and a fixed plate, FIG. 4 is a system diagram of its control system, and FIG. 5 is a block diagram of its control system. 1 ... Tire type cable engine, 2 ... Tire, 3 ...
... Speed detector, 4 ... Cable braking device, 5 ... Crimping plate, 5a ... Fixing plate, 6 ... Air cylinder, 7 ... Frame, 8 ... Piping, 9 ... Pneumatic panel, 10 ... Electromagnetic Valve, 11 ... Pressure adjusting valve, 12 ... Wiring, 13 ... Operating box, 14 ... Pilot pressure adjusting valve, 15 ... Solenoid valve,
16 ... Cable, 17 ... Pinch roller, 18 ... Dynamometer, 19 ... Data processing board, 20 ... Relay board, 21 ... Slip rate setting device, 22 ... Tension setting device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kiyoto Hirakawa Inventor Kiyoto Hirakawa 1-1, Atsunoura-machi, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Kazuo Okabayashi 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo No. Nihon Telegraph and Telephone Corp. (72) Inventor Ryo Hashiguchi 1-1, Atsunoura Town, Nagasaki City, Nagasaki Nagahishi Design Co., Ltd. (56) References 58-103518 (JP, U) JP-B 54-7954 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A tire-type cable engine capable of delivering a cable while gripping the cable between a plurality of tires, and a cable braking device installed near the cable engine so as to brake the cable. The tire speed detecting means for detecting the speed of feeding the cable of the tire, the cable speed detecting means for detecting the feeding speed of the cable, the detection signal from the tire speed detecting means and the cable speed detecting means. A data processing board for calculating the deviation between the slip ratio and the slip ratio set value by calculating the slip ratio of the cable with respect to the tire in response to the detection signal from the data processing board is provided, and based on the processing result in the data processing board. Actuating the cable braking device when the slip ratio exceeds the slip ratio set value Wherein the control system is provided, the cable brake with cable laying equipment.