CN201065285Y - Lightweight longitudinal dry cargo supplying system on the sea - Google Patents

Abstract

The utility model discloses a light vertical dry goods replenishment system at sea, which comprises a gantry bracket supporting a combination of elevated cables and steel cables, a winch corresponding to each cable respectively, a wave compensating device arranged in the combination of elevated cables and steel cables, and a crane moving along the elevated cables. Hook device; the wave compensation device is composed of the secondary compensation device of the overhead cable and the inner cable winch; the secondary compensation device of the elevated cable is composed of the wave compensation cylinder and the overhead cable winch; the wave compensation cylinder and the overhead cable winch are respectively connected to the hydraulic power station , under the action of the hydraulic power station, ensure that the overhead cable is always in a constant tension state; the inner traction winch is a hydraulic winch with compensation function; The hook at the junction and the sliding plate are respectively provided with inner and outer cable locking mechanisms. The utility model is suitable for the principle of the support, transmission and compensation system and the arrangement mode of the drive device of the offshore light supply system of the small ship.

Description

Maritime Light Longitudinal Dry Cargo Replenishment System

technical field

The utility model relates to a marine supply system, in particular to a marine longitudinal supply system.

Background technique

When the ship is sailing at sea or the platform is operating in the open sea, the stored food, fuel, water and other materials will be continuously consumed. In order to ensure the normal operation of the ship and the platform, the consumed materials must be quickly replenished. Due to various factors such as ports, waterways, and sea conditions, it is often impossible to enter the port for replenishment, so it has to use sea replenishment. Due to the big difference in the replenishment methods of dry cargo and liquid cargo at sea, the marine replenishment of ships is usually divided into two types: dry cargo replenishment and liquid cargo replenishment.

At present, there are mainly four supply methods for working at sea. One is the transverse cableway replenishment method, that is, between two or three ships sailing in parallel, or between an anchored ship and a shore receiving device; one ship is moored to a platform or floating facility, and the other ship is steered Keep the device at a safe distance from the preceding ship. The second is the longitudinal cableway replenishment method, that is, the tail of one ship is moored on a platform or floating facility, and the steering gear of the other ship is kept at a certain safe distance from the previous ship, and the two ships are connected by a cableway, as shown in Figure 1 Show. The 3rd, rely on the tie-up supply method (being tied to each other), this method is applicable to short-distance sea supply, is limited by sea conditions, can not guarantee the safety of goods and ships. The fourth is the vertical replenishment method, that is, the use of helicopters for replenishment, but limited by the flight conditions of helicopters. Resupply operations cannot be carried out around the clock and at night.

There are three basic forms of dry cargo transportation: single cable method, through cable method and elevated cable method. Among them, the offshore dry cargo supply system of the elevated cable is shown in Figure 2: the whole system uses 3 winches, which correspond to the inner traction cable, the outer traction cable and the overhead cable which plays a load-bearing role respectively. The inner traction winch and the overhead cable winch are generally installed in On the supply ship, the external traction winch can be installed on the supply ship or the receiving ship. The two traction winches operate synchronously. safe distance.

With the development of marine technology, many small ships in various countries have been put into operation. At present, the viaduct sea replenishment device is mainly implemented on large ships, so how to realize the sea replenishment of small ships has become a new research topic. For small ships (the so-called small ships in the utility model refer to ships with a displacement of less than 1000 tons), due to the inherent capacity limitation of the ships, it is difficult to directly adopt the replenishment operation method and technology of large ships, and many new technical problems will arise. Therefore, there is an urgent need to develop a replenishment system suitable for small ships.

Utility model content

Aiming at the problems existing in the above-mentioned prior art, the utility model provides a light vertical dry cargo replenishment system at sea which can adapt to the replenishment operation of small ships. The utility model is based on the method of longitudinally conveying goods, that is, the tail of one ship (supply ship) is moored on a platform or floating facility, and the other ship (receiving ship) maintains a certain safe distance from the previous ship with a steering device. The two ships are connected by a cableway, and supplies are pulled from the supply ship to the receiving ship by the viaduct. The utility model is suitable for the principle of the support, transmission and compensation system of the offshore light supply system of small ships and the configuration mode of the driving device, as well as the static performance of the supply system, the dynamic response of the wave of the supply system and the dynamic response of the supply mechanism. The maritime light vertical dry cargo replenishment system has the characteristics of light weight, miniaturization and simplification of receiving devices.

In order to solve the above-mentioned technical problems, the technical scheme realized by the light-duty offshore dry cargo replenishment system of the utility model is as follows: the gantry support supporting the combination of elevated cables and steel cables, the winches respectively corresponding to the cables, and the components installed in the combination of elevated cables and steel cables The wave compensation device is a hook device that moves along the overhead cable; the wave compensation device is composed of the secondary compensation device of the elevated cable and the inner cable winch; the secondary compensation device of the elevated cable is composed of a wave compensation oil cylinder and an overhead cable winch Three pulleys are respectively arranged on the two sides of the wave compensation oil cylinder of the elevated cable and the hydraulic rod, the elevated cable passes through the three pulleys, one end is connected with the elevated cable winch, and the other end passes through the support pulley on the door frame bracket; The wave compensation oil cylinder and the overhead cable winch are respectively connected to the hydraulic power station, under the action of the hydraulic power station, the overhead cable is always in a constant tension state; the inner traction winch is a hydraulic winch with compensation function; The hook device includes a slideway for passing the overhead cable on the slide plate and a hook located at the junction of the inner and outer stay cables, and the slide plate is respectively provided with locking mechanisms for the inner and outer stay cables.

In the present utility model offshore light-duty longitudinal dry cargo replenishment system, the slideway is composed of a plurality of guide pulleys, wherein two pulleys guide the overhead cable, and the other two pulleys guide the inner and outer pulleys; the hook is located inside the guide , Between the two pulleys of the outer cable.

The utility model provides a light-duty vertical dry cargo replenishment system at sea, wherein the locking mechanism includes a spring fixed on a positioning pin and a steel cable baffle connected to the spring.

Compared with the prior art, the utility model has the beneficial effects of the offshore light vertical dry cargo supply system as follows:

(1) In order to adapt to the influence of the swaying and yaw of light ships on the transmission operation, the utility model adopts wave compensation measures for the overhead cables, that is, a tension is set between the overhead rigging and the overhead cable tension winch. Compensator, the tension compensator adopts the structure of hydraulic cylinder. Under normal working conditions, the overhead cable tension winch is in the static state of transverse tension, and the hydraulic cylinder is in the neutral position. Due to the action of waves, the tension of the overhead cable changes. At this time, under the action of the hydraulic power station, the overhead cable tension winch and the hydraulic oil as a tension compensator are simultaneously activated to compensate for the tension change of the overhead cable to maintain its constant tension. The tension compensator in the utility model can quickly compensate the tension change of the overhead cable: when the tension becomes smaller, the oil cylinder stretches out, when the tension increases, the oil cylinder retracts, and when the tension remains at the preset size, the oil cylinder returns to the neutral position . The overhead cable tension winch will start to compensate at the same time as the hydraulic cylinder. When the overhead cable tension becomes smaller, the overhead cable tension winch takes in the rope. When the overhead cable tension increases, the overhead cable tension winch releases the rope. When the overhead cable tension reaches the preset size, The overhead cable tension winch stops receiving or releasing the rope.

The wave compensation oil cylinder in the utility model is a first-level compensation, which is characterized by rapid response and small compensation range. The overhead cable winch is a secondary compensation, which is characterized by a late response and a large compensation range. These two compensating mechanisms are controlled by the same hydraulic power station. Under the unified control of the hydraulic power station, it can ensure that the overhead cable is always in a constant tension state, thereby ensuring the safety of the light ship's replenishment cargo.

(2) The inner traction winch in the utility model is a hydraulic winch with compensation function. During replenishment, the inner traction winch follows, but the steel wire rope is kept straight, that is, in a state of zero tension tension, so that there will be no impact and movement of the hook device to the receiving ship under the action of cargo gravity when the inner guy rope is loose. situation, avoiding the hook device colliding with the fixing device of the viaduct on the receiving ship. When the distance increases or decreases due to waves, the inner traction winch compensates for the zero tension tension state. When the hook device returns, the inner traction winch is in the active traction state, the inner guy cable is tensioned and stressed, and the hook device is pulled from the receiving ship to the supply ship through the inner guy cable.

Description of drawings

Fig. 1 is the schematic diagram of prior art longitudinal cableway replenishment method;

Fig. 2 is a schematic diagram of a dry cargo replenishment system at sea with an elevated cable in the prior art;

Fig. 3 is a working principle diagram of the light vertical dry cargo replenishment system at sea of the utility model;

Fig. 4 is a front view of the utility model offshore light vertical dry cargo supply system;

Figure 5 is a top view of the replenishment system shown in Figure 4;

Fig. 6 is a structural schematic diagram of the mast support 11 in the replenishment system shown in Fig. 4;

Fig. 7 is a schematic structural view of the hook device 5 shown in Fig. 4;

Fig. 8 is a state diagram when cargo C of the replenishment system of the present invention is hoisted;

Fig. 9 is a state diagram when cargo C of the replenishment system of the present invention passes through the maximum deflection point of the guy wire;

Fig. 10 is a state diagram of the replenishment system of the present invention when the cargo C arrives at the receiving ship B;

Fig. 11 is a state diagram when the cargo C of the replenishment system of the present invention is unloaded.

Below is the description of the reference signs in the accompanying drawings of the description in the utility model:

A——supply ship B——receiving ship C——cargo

1——Elevated cable winch 2——External cable winch 3——Inner cable winch

4——Heave compensation cylinder 5——Hook device 6——Hydraulic power station

7——Hook 8——Inner cable 9——Outer cable

10——Elevated Cable 11——Mast Frame Bracket 12——Traction Steering Gear

13——Transmission drum tensioner

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Fig. 3, Fig. 4 and Fig. 5, the composition of the offshore light vertical dry cargo replenishment system of the present utility model is: the whole system includes a gantry support 11 supporting the combination of elevated cables and steel cables, and the winches 1, 2, 3. The wave compensating device arranged in the elevated cable and steel cable combination, the elevated cable and steel cable combination is composed of three sets of slings: the elevated cable 10, the inner cable 8 and the outer cable 9, and the traction winches of the three sets of rigging are all Arranged on the supply ship A; the conveying coil car is composed of a hook device 5, which is located on the overhead cable 10, pulled by the inner cable 8 and the outer cable 9, moves along the elevated cable 10 and reciprocates;

In order to adapt to the influence of the ship's sway and yaw on the transmission operation, wave compensation is performed on the overhead cable 10 to keep the tension of the overhead cable 10 constant. The wave compensation device is composed of the secondary compensation mechanism of the overhead cable 10 and the compensation mechanism of the inner cable winch 3 .

The secondary compensation mechanism of the overhead cable is composed of a wave compensation cylinder 4 and an overhead cable winch 1; the wave compensation cylinder 4 is a primary compensation, which is characterized by rapid response and small compensation range; the two sides of the wave compensation cylinder 4 Three pulleys are respectively arranged on the hydraulic rod and the overhead cable 10 passes through the three pulleys, one end of which is connected with the overhead cable winch 1, and the other end passes through the support pulley on the gantry bracket 11 and is fixed to the receiving ship B. The structure of the door frame support 11 is shown in Figure 6. The overhead cable winch 1 is secondary compensation, which is characterized by a late response but a large compensation range, which is mainly used to increase the compensation range and ensure operation safety. During operation, the overhead cable winch 1 and the wave compensation cylinder 4 perform compensation actions at the same time, and the above-mentioned first and second compensation mechanisms are uniformly controlled by a set of hydraulic power station 6. Under the action of the hydraulic power station 6, the elevated Cable 10 is always in a state of constant tension, so that a certain safe distance is kept between the supply ship A and the receiving ship B.

The internal cable compensation mechanism is undertaken by the internal cable winch 3, and the internal cable winch is a hydraulic winch with a compensation function. When the cargo C is transported, the internal cable winch 3 follows. It can be guaranteed that the inner stay rope 8 is always in a follow-up tension state. The outer guy winch 2 is an ordinary hydraulic winch. When transferring the cargo C, the outer guy winch 2 actively pulls and pulls the hook device 5 to move from the supply ship A to the receiving ship B; Guy rope 9 is loose.

As shown in Figure 7, the hook device 5 includes a slideway for passing the overhead cable 10 on the slide and a hook 7 at the junction of the inner and outer pulleys, the slideboard is respectively provided with the inside and outside pulleys Locking mechanism; the slideway is composed of a plurality of guide pulleys, wherein two pulleys guide the overhead cable, and the other two pulleys guide the inner and outer stay cables; the hook is located on the two pulleys that guide the inner and outer stay cables Between; the locking mechanism includes a spring fixed on the positioning pin, and a cable baffle connected to the spring. When the hook reaches the supply ship A or the receiving ship B, pull down the control rope, lift one of the baffles, and put down the hanging basket; during the transmission process, the baffle locks the inner and outer cables under the action of the spring to ensure that the cargo C does not fall.

Considering that the receiving ship B is small in size, relatively poor in stability, and the superstructure is simple, in the design of the supply system, the fixed facilities on the receiving ship B are as simple as possible. Therefore, on the receiving ship B side, the viaduct 10, inner The three sets of steel cables of the guy rope 8 and the outer guy cable 9 are all wound on a block hook. Hook connection device.

Describe working process of the present utility model in conjunction with accompanying drawing.

As shown in Fig. 8, Fig. 9, Fig. 10 and Fig. 11, when conveying the cargo C, the cargo C relies on the hook device erected on the overhead cable 10 between the supply ship A and the fixed point of the receiving ship B (that is, the pulley hook). 5 to teleport. The overhead cable 10 is controlled by the overhead cable winch 1 and the wave compensating oil cylinder 4 arranged on the supply ship A, so as to maintain the constant tension of the overhead cable 10 . In order to enable the hook device 5 to be transported back and forth between the two ships A and B, an outer dragline 9 is pulled to the receiving ship B, and after passing through the rear traction steering gear 12, it returns to the supply ship A and connects with the hook. The traction end of device 5 outer stay rope 9 is connected. The outer guy rope 9 is pulled by the outer guy cable winch 2, and the cargo C on the hook device 5 is sent to the receiving ship B along the cableway of the overhead cable 10. The inner guy rope 8 is connected with the inner guy cable end of the hook device 5, and is pulled by the inner guy cable winch 3, and the empty hook device 5 is pulled back to the supply ship A. So far, the delivery of cargo C has been completed.

Below is the application example design of the light vertical dry cargo replenishment system at sea of the present utility model.

Main dimensions of supply ship A and receiving ship B:

name supply ship A accept ship B Captain (m) 48.60 32.26 Width (m) 12 5.8 Draft (m) 3.25 1.205 Displacement (t) 1157.0 104.52 Height of supply point (distance from sea level) 9.6 5.6

Setting of important parameters in replenishment

parameters unit design value Supply distance m 40 Supply point height difference m 4 cargo weight kg 500 Elevated Cable Constant Tension kg 2000 Elevator diameter mm 10 mass distribution Kg/m 0.4 supply condition - Class 3 sea state (using Pierson-Moskowits wave energy spectrum, wave height 1m)

According to the parameters set above, through calculation:

(1) The maximum tension suffered by the overhead cable 10 is 5026kg, and the breaking force of a steel cable less than 10mm in diameter is 15.4t;

(2) In the process of replenishment at sea, consider the most dangerous state under level 3 sea conditions (wave height 1m), that is, cargo C is at the wave crest, and the two ships are at the wave trough. At this time, the wave height is 2.56m, and the maximum deflection of the cable is 1.56m. When the cargo C is still about 2.98m away from the sea surface, the system can fully guarantee the safe delivery of cargo C;

(3) The compensation amount of the wave compensation device changes within the range of plus or minus 1.2m, that is, the maximum compensation amount is 1.2m; the minimum response period is less than 3.55s;

To sum up, the utility model offshore light vertical dry cargo replenishment system has the characteristics of small displacement and simple superstructure suitable for the small receiving ship B. It is not only suitable for the small receiving ship B, but also can ensure the smooth implementation of the replenishment process.

Although the utility model has been described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, rather than restrictive. Under the enlightenment of the utility model, many deformations can be made without departing from the purpose of the utility model and the scope of protection of the claims, and these all belong to the list of protection of the utility model.

Claims (3)

1. A light longitudinal dry cargo replenishment system at sea, comprising a gantry bracket supporting the combination of elevated cables and steel cables, winches corresponding to each cable respectively, a wave compensation device arranged in the combination of elevated cables and steel cables, and a hook moving along the elevated cables device; characterized in that: The wave compensation device is composed of the secondary compensation device of the elevated cable and the inner cable winch; the secondary compensation device of the elevated cable is composed of a wave compensation oil cylinder and an elevated cable winch; the two sides of the wave compensation oil cylinder of the elevated cable and the hydraulic pressure Three pulleys are respectively arranged on the rod, and the overhead cable passes through the three pulleys, one end is connected with the overhead cable winch, and the other end passes through the support pulley on the gantry bracket and is fixed on the receiving ship; the wave compensation oil cylinder and the overhead cable The winches are respectively connected to the hydraulic power station, and under the action of the hydraulic power station, the overhead cable is always in a constant tension state; the inner traction winch is a hydraulic winch with compensation function; The hook device includes a slideway for passing the overhead cable on the slide plate and a hook located at the junction of the inner and outer stay cables, and the slide plate is respectively provided with locking mechanisms for the inner and outer stay cables. 2. The offshore light-duty longitudinal dry cargo replenishment system according to claim 1, wherein the slideway is composed of a plurality of guide pulleys, wherein two pulleys guide the overhead cable, and the other two pulleys guide the inner and outer pulleys; The hook is located between the two pulleys that guide the inner and outer guy ropes. 3. The marine light vertical dry cargo replenishment system according to claim 1 or 2, characterized in that: the locking mechanism includes a spring fixed on the positioning pin, and a cable baffle connected to the spring.

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