CN111130049A

CN111130049A - Telescopic rotary submarine cable back-twisting frame

Info

Publication number: CN111130049A
Application number: CN201911291649.2A
Authority: CN
Inventors: 缪一星; 沈光; 李�昊
Original assignee: Shanghai Foundation Engineering Group Co Ltd
Current assignee: Shanghai Foundation Engineering Group Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-05-08
Anticipated expiration: 2039-12-16
Also published as: CN111130049B

Abstract

The invention relates to a telescopic rotary submarine cable back-twisting frame which comprises a back-twisting frame fixing upright post, a rotary mechanism, a balance weight and a cable turntable, wherein the upper end of the back-twisting frame fixing upright post is connected with a T-shaped arm fixing part through the rotary mechanism, one end of the T-shaped arm fixing part is connected with the balance weight, the other end of the T-shaped arm fixing part is connected with a T-shaped arm movable arm in a sliding fit mode, the T-shaped arm movable arm is connected with a hydraulic oil cylinder arranged in the T-shaped arm fixing part and driven by the hydraulic oil cylinder to stretch back and forth, a T-shaped arm fixing arm is further fixedly connected to the T-shaped arm fixing part, and cable chutes are formed in the T. The invention is used for horizontally rotating and untwisting under normal conditions, and can be converted into a center pull-up untwisting through rotation and expansion under emergency conditions, thereby avoiding damaging cables or untwisting frames.

Description

Telescopic rotary submarine cable back-twisting frame

Technical Field

The invention relates to a back-twisting frame for laying submarine cables, in particular to a telescopic rotary submarine cable back-twisting frame.

Background

The diameter of the current submarine cable generally breaks through 200mm, the voltage class reaches 220kV or even above, the problem of untwisting in the construction operation process is increasingly emphasized, the traditional form of pulling up and untwisting at the center is difficult to place the cable and a smooth disc into a submarine cable fixing cable storage pool of a cable laying ship, and therefore the horizontal rotation untwisting device is widely applied to large-diameter and high-voltage submarine cables. However, horizontal rotation cable winding and unwinding depends on active operation of a cable tray, and under some special emergency conditions, such as high sea conditions, the cable is required to be considered to be forcibly locked on a submarine cable turntable, and for example, during cable laying, anchor walking occurs, the cable feeding speed of the turntable cannot keep up with the anchor walking speed, and at the moment, the submarine cable is forced to be pulled, and the danger of pulling off the submarine cable or pulling back a back-twist frame occurs.

In view of the above, there is a need for a device that is adapted to horizontally rotate back twist in a normal situation and to convert to center pull up back twist in an emergency situation, avoiding damage to the cable or back twist rack.

Disclosure of Invention

The invention provides a telescopic rotary submarine cable back-twist frame which is suitable for horizontally rotating back-twist under a normal condition and can be converted into a center-pulling back-twist under an emergency condition so as to avoid damaging a cable or the back-twist frame.

In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a telescopic gyration extra large cable moves back and turns round frame, turns round frame stationary mast, rotation mechanism, counter weight, cable carousel including moving back, turn round frame stationary mast upper end and connect T type arm fixed part through rotation mechanism, and the counter weight is connected to T type arm fixed part one end, and sliding fit connects T type arm digging arm in the other end, and T type arm digging arm is connected with the hydraulic cylinder of installing in T type arm fixed part, by hydraulic cylinder drive T type arm digging arm flexible around, go back fixedly connected with T type arm fixed arm on the T type arm fixed part, be equipped with the cable chute on T type arm digging arm and the T type arm fixed arm.

Furthermore, the slewing mechanism is composed of a motor, a cycloidal pin gear reducer and a rotating shaft, wherein the motor is connected with the rotating shaft through the cycloidal pin gear reducer, and the rotating shaft is connected with the T-shaped arm fixing part.

Furthermore, the rotating shaft is a slewing bearing driven by a cycloidal pin gear speed reducer driven by a motor, and the T-shaped arm movable arm 6 is positioned above the rotating shaft and is pushed to stretch by a hydraulic oil cylinder.

Further, the fixed stand of the back-twist frame can be a quilting frame or a barrel body for a fixed steel structure.

Further, when the large-diameter high-voltage-level submarine cable application scene needing horizontal rotation untwisting is normal, the T-shaped arm movable arm retracts, the T-shaped arm movable arm rotates to the tangential position of the cable turntable, and normal rotation horizontal untwisting is adopted.

Further, when a small-diameter and low-voltage submarine cable which does not need to be untwisted in horizontal rotation or a large-diameter and high-voltage submarine cable which needs to be untwisted in horizontal rotation is in an emergency situation, the T-shaped arm movable arm rotates to the center of the cable turntable, extends outwards, is converted into a center to be pulled high, and is untwisted, and the cable or the untwisting frame can be prevented from being damaged.

The invention has the beneficial effects that:

1. under the application scene of a large-diameter high-voltage-level submarine cable needing horizontal rotation back-twisting, the device is suitable for horizontal rotation back-twisting under the normal condition, and can be converted into center pull-up back-twisting under the emergency condition. Avoid damaging the cable or untwisting the frame.

2. The small-diameter low-voltage submarine cable which does not need to be horizontally rotated to untwist can be directly extended to extend the T-shaped arm and rotate to the middle to pull up the center to untwist.

Drawings

FIG. 1 is a side view of a telescoping slewing submarine cable untwisting frame of the present invention;

FIG. 2 is a top view of the retractable slewing submarine cable untwisting frame of the present invention;

FIG. 3 is a diagram illustrating the operation state of the present invention

Fig. 4 is a schematic diagram of the working state of the present invention.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in fig. 1 and 2, a telescopic rotary submarine cable back-twist frame comprises a back-twist frame fixing upright 1, a rotary mechanism 2, a counterweight 3, a T-shaped arm fixing part 4, a hydraulic oil cylinder 5, a T-shaped arm movable arm 6, a cable chute 7 and a cable turntable 8.

Turn round 1 upper end of frame stationary mast and connect T type arm fixed part 4 through rotation mechanism 2, counter weight 3 is connected to 4 one ends of T type arm fixed part, sliding fit connects T type arm digging arm 6 in the other end, and T type arm digging arm 6 is connected with hydraulic cylinder 5 of installing in T type arm fixed part 4, stretch out and draw back around the T type arm digging arm 6 of 5 drive of hydraulic cylinder 5, still fixedly connected with T type arm fixed arm on the T type arm fixed part 4, cable chute 7 has on T type arm digging arm 6 and the T type arm fixed arm.

The swing mechanism 2 is composed of a motor, a cycloidal pin gear reducer and a rotating shaft, the motor is connected with the rotating shaft through the cycloidal pin gear reducer, and the rotating shaft is connected with the T-shaped arm fixing part 4.

The upright post is a fixed steel structure and can be a truss or a barrel body; the rotating shaft is a slewing bearing driven by a cycloidal pin gear speed reducer driven by a motor; the T-shaped arm movable arm 6 is positioned above the rotating shaft and can be pushed by a hydraulic oil cylinder to stretch.

Fig. 3 shows that the telescopic arm retracts under the normal condition of the large-diameter high-voltage-level submarine cable application scene requiring horizontal rotation back-twisting, the T-shaped arm rotates to the tangential position of the turntable, and normal rotation horizontal back-twisting is adopted.

Fig. 4 shows that a small-diameter and low-voltage submarine cable without a horizontal rotation back-twist or a large-diameter and high-voltage submarine cable with a horizontal rotation back-twist is rotated to the center of the turntable under an emergency condition, and the T-shaped arm of the back-twist frame is extended and converted into a center pull-up back-twist. Prevent the cable or the back-twist rack from being damaged.

Claims

1. The utility model provides a telescopic gyration submarine cable moves back and turns round frame, turns round frame stationary mast, rotation mechanism, counter weight, cable carousel including moving back, its characterized in that: turn round frame stationary mast upper end and pass through rotation mechanism and connect T type arm fixed part, and counter weight is connected to T type arm fixed part one end, and sliding fit connects T type arm digging arm in the other end, and T type arm digging arm is connected with the hydraulic cylinder of installing in T type arm fixed part, and is flexible around the T type arm digging arm of hydraulic cylinder drive, go back fixedly connected with T type arm fixed arm on the T type arm fixed part, be equipped with the cable chute on T type arm digging arm and the T type arm fixed arm.

2. The telescopic slewing submarine cable untwisting frame according to claim 1, wherein: the slewing mechanism is composed of a motor, a cycloidal pin gear reducer and a rotating shaft, wherein the motor is connected with the rotating shaft through the cycloidal pin gear reducer, and the rotating shaft is connected with the T-shaped arm fixing part.

3. The telescopic slewing submarine cable untwisting frame according to claim 2, wherein: the rotating shaft is a slewing bearing driven by a cycloidal pin wheel speed reducer driven by a motor, and the T-shaped arm movable arm 6 is positioned above the rotating shaft and is pushed to stretch by a hydraulic oil cylinder.

4. The telescopic slewing submarine cable untwisting frame according to claim 1, wherein: the back-twist frame fixing upright post can be a quilting frame or a barrel body for a fixing steel structure.

5. The telescopic slewing submarine cable untwisting frame according to claim 1, wherein: when the large-diameter high-voltage-level submarine cable application scene needing horizontal rotation untwisting is normal, the T-shaped arm movable arm retracts, the T-shaped arm movable arm is turned to the tangential position of the cable turntable, and normal rotation horizontal untwisting is adopted.

6. The telescopic slewing submarine cable untwisting frame according to claim 1, wherein: when a small-diameter and low-voltage submarine cable which does not need to be horizontally rotated to back the twist or a large-diameter and high-voltage submarine cable which needs to be horizontally rotated to back the twist are in emergency, the T-shaped arm movable arm rotates to the center of the cable turntable, extends outwards, is converted into a center pull-up to back the twist, and can prevent the cable or the back-twist frame from being damaged.