SU552237A1 - Device for transferring cargo between ships at sea - Google Patents

Description

one

The invention relates to loading and unloading devices for transferring cargo between ships at sea.

A device for transferring cargo between ships is known, comprising a boom type crane, a cargo winch, a hydraulic cylinder with a sensor mounted on it connected to the hydraulic cylinder rod.

A disadvantage of the known device is a reduction in the accuracy of control of the transmission under the influence of external disturbing influences.

It is also known a device for transferring cargo between ships to the sea, comprising a crane with a winch, the cargo rope of which is stored through fixed and movable cages of blocks, the latter of which is connected to the cylinder of the tracking cylinder, a sensor for moving the deck of the receiving vessel, the output of which is connected to one of the entrances signal conditioner, and driver unit.

In the known devices, a control signal for lifting and lowering the load is produced depending on the signal of the displacement sensor of the deck of the receiving vessel, which may be false as a result of receiving the sensor in addition to the vertical and longitudinal and transverse-horizontal movements of the vessel, which can lead to a collision of the load .the deck of the receiving vessel.

The purpose of the invention is to eliminate the influence of the longitudinal and transverse-horizontal displacements of the receiving vessel.

The goal is achieved by the fact that the device is equipped with a sensor for moving the boom knockout of a transmitting vessel, connected to another input of the driver, and

OR elements, each of which is connected between the corresponding outputs of the signal conditioner and the inputs of the master unit. The drawing shows the functional

device schema.

The device consists of a winch 1, the cargo rope 2 of which is stocked through the ferrule 3 movable blocks with the rod 4 of the hydraulic cylinder 5, the ferrule 6 fixed blocks, sensor

7 displacements of the deck of the receiving vessel and the knob 8 displacement sensor of the front of the vessel, the outputs of which are connected to the corresponding inputs of the signal generator 9, the outputs of which are connected to the input port and

The lowering of the load is associated respectively with the inputs of the elements OR 10, AND, the outputs of which are connected through the driver unit 12 to the distribution mechanism 13 controlling the hydraulic cylinder 5. The displacement sensors 7 and 8 are, for example, accelerometers.

The device works as follows.

If there are oscillations of a boom knockout knock caused by the motion of the transmitting vessel and complicated movements of the receiving vessel, consisting of vertical, longitudinal and transverse-horizontal components, the output signals of sensors 7 and 8 will produce analog signals of the corresponding signs (+ or -) and amplitudes which are input to the imaging unit 9 of the signals, where they are summed, amplified and sampled to form a square wave signal of positive or negative polarity.

As a result of processing the signals of sensors 7 and 8, the control signal in a discrete form is applied to the elements OR 10, 11, from whose outputs — to the inputs of block 12 — a signal is received for lifting or lowering the load, corresponding only to the vertical component of movements of the boom knuckle of the transmitting vessel and complex movements of the receiving vessel.

When the boom of the crane of the transmitting vessel oscillates and if there are only longitudinal or transverse-horizontal movements of the receiving vessel or at the same time both, the signal of the corresponding sign (4- or -) will be produced at the output of the movement sensor 8, and at the output of the movement sensor 7 the signal equals zero.

As a result of processing the signal of the displacement sensor 8 and the operation of the mechanism 13, the working fluid enters one or another

the cavity of the hydraulic cylinder 5, so that the load will move depending on the sign of the vertical component of the oscillations of the boom boom knock.

In the absence of oscillations of the boom knockout and the presence of longitudinal or transverse-horizontal displacements of the receiving vessel or at the same time those of the other sensors 7 and 8 displacement, the control signals will be zero, as a result, the longitudinal and transverse-horizontal displacements of the receiving vessel will not affect on the movement of the load, as in this case the tracking cylinder will not move.

Claims (1)

Invention Formula A device for transferring cargo between ships at sea, containing a crane with a winch, the cargo rope of which is stored through fixed and movable cages of blocks, the last of which is connected to the tracking cylinder rod, a deck displacement sensor the receiving vessel, the output of which is connected to one of the inputs of the signal conditioner, and the driver unit, characterized in that, in order to eliminate the influence of the longitudinal and transverse-horizontal movements of the receiving vessel, it is equipped with a sensor for moving the bow of the crane of the transmitting vessel connected to another input the signal conditioner, and the OR elements, each of which is connected between the respective outputs of the signal conditioner and the inputs of the driver unit.