CN113291990A

CN113291990A - Constant tension ship displacement measuring device

Info

Publication number: CN113291990A
Application number: CN202110689554.7A
Authority: CN
Inventors: 王志军; 许亮; 姚磊; 解维远
Original assignee: Cssc Luzhou Zhenjiang Marine Auxiliary Machinery Co ltd
Current assignee: Cssc Luzhou Zhenjiang Marine Auxiliary Machinery Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-08-24

Abstract

The invention discloses a constant-tension ship displacement measuring device, which comprises a supply ship and a supplied ship, wherein a compensation crane is arranged on the supply ship, a supply winch and a measuring winch are arranged on a suspension arm of the compensation crane, the supply winch is connected with a supply lifting hook through a steel wire rope penetrating through a pulley, the supply lifting hook is connected with supplied goods, the measuring winch is connected with the measuring lifting hook through the steel wire rope penetrating through the pulley, the measuring lifting hook is connected with an ear ring on a deck of the supplied ship, the measuring winch comprises a hydraulic motor, a motor valve group is arranged on the hydraulic motor, the motor valve group comprises a throttling valve, a balance valve and an overflow valve, the hydraulic motor is connected with a winding drum, the hydraulic motor and the winding drum are both arranged on a wall frame, and an encoder is also arranged on the hydraulic motor.

Description

Constant tension ship displacement measuring device

Technical Field

The invention relates to a constant-tension ship displacement measuring device.

Background

When the ship crane is used for ship-to-ship replenishment work at sea, the ship body can move up and down relatively due to the influence of wind waves, and great difficulty is brought to safety replenishment at sea. In this case, the crane is required to have a wave compensation function, and when the replenishment work is performed in the presence of wind and waves, the replenishment work with the compensation function is performed on the ship to be replenished so as to ensure the safety of the replenished cargo and the ship to be replenished, and the cargo can be safely and smoothly transferred even in the presence of wind and waves. The crane heave compensation function is realized by detecting the displacement of the supply ship and the supplied ship in the vertical direction, transmitting the displacement signal to a control system CPU, and transmitting the control signal to an electro proportional valve of a crane winch after the CPU performs program processing and operation. Therefore, how to detect and transmit the relative displacement signals of the supply ship and the supplied ship in the vertical direction is a key technology for realizing the crane heave compensation function.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a constant-tension ship displacement measuring device.

The utility model provides a constant tension boats and ships displacement measurement device, includes the tender and by the tender, is equipped with the compensation loop wheel machine on the tender, is equipped with supply winch and measurement winch on the davit of compensation loop wheel machine, and supply winch links to each other with the supply lifting hook through the wire rope that passes the pulley, and the supply lifting hook links to each other with the supply goods, and the measurement winch links to each other with the measurement lifting hook through the wire rope that passes the pulley, and the measurement lifting hook links to each other with the earrings on the tender deck, the measurement winch include hydraulic motor, be equipped with the motor valves on the hydraulic motor, the motor valves include choke valve, balanced valve and overflow valve, hydraulic motor links to each other with the reel, and hydraulic motor and reel all install on the walling, still.

As a further improvement, the bottom of the wall frame is provided with a mounting hole, and the wall frame is connected with the compensation crane through a bolt.

As a further improvement, the hydraulic motor and the winding drum are connected with the wall frame through bolts.

As a further improvement, the compensation crane comprises a hoisting mechanism, a slewing mechanism and a luffing mechanism.

As a further improvement, a control system is included and is connected with the encoder.

Has the advantages that:

1. the constant-tension ship displacement measuring system is a flexible system, when the actual tension of the steel wire rope is greater than the set tension under any working condition, the motor can be passively dragged backwards, the overload protection function is achieved, and the steel wire rope and the winch are prevented from being damaged.

2. Compared with the traditional oil cylinder measuring mode, the measuring stroke of the oil cylinder measuring device is not limited.

3. The displacement data is detected by the rotary encoder, the measurement precision is high, and the signals are easy to process.

4. The system has simple composition and low manufacturing, using and maintaining cost.

Drawings

FIG. 1 is a schematic view of the general structure of a constant tension ship displacement measuring device;

FIG. 2 is a schematic view of the general construction of a hydraulic motor;

FIG. 3 is a schematic diagram of a motor valve block;

1. the system comprises a to-be-supplied ship 2, a measuring hook 3, a supply cargo 4, a supply hook 5, a supply winch 6, a measuring winch 7, a compensation crane 8, a supply ship 9, a hydraulic motor 10, a motor valve bank 11, a wall frame 12, a winding drum 13, an encoder 14, a throttle valve 15, a balance valve 16 and an overflow valve.

Detailed Description

For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.

As shown in fig. 1 to 3, a constant tension ship displacement measuring device includes a ship to be supplied 1, a measuring hook 2, a supply cargo 3, a supply hook 4, a supply winch 5, a measuring winch 6, a compensation crane 7, a supply ship 8, a hydraulic motor 9, a motor valve group 10, a wall frame 11, a winding drum 12, an encoder 13, a throttle valve 14, a balance valve 15 and an overflow valve 16.

A constant tension ship displacement measuring device comprises a supply ship and a supplied ship, wherein a compensation crane is arranged on the supply ship, a supply winch and a measuring winch are arranged on a suspension arm of the compensation crane, the supply winch is connected with a supply lifting hook through a steel wire rope penetrating through a pulley, the supply lifting hook is connected with supplied goods, the measuring winch is connected with the measuring lifting hook through the steel wire rope penetrating through the pulley, the measuring lifting hook is connected with an earring on a deck of the supplied ship, the measuring winch comprises a hydraulic motor, a motor valve group is arranged on the hydraulic motor, the motor valve group comprises a throttling valve, a balance valve and an overflow valve, the hydraulic motor is connected with a winding drum, the hydraulic motor and the winding drum are both arranged on a wall frame, an encoder is also arranged on the hydraulic motor, an installation hole is arranged at the bottom of the wall frame, the wall frame is connected with the compensation crane through a bolt, and the hydraulic motor and the winding drum are connected with the wall frame through a bolt, the compensation crane comprises a hoisting mechanism, a swing mechanism and a luffing mechanism and comprises a control system, and the control system is connected with an encoder.

When a replenishment operation with a compensation function is performed at sea, the compensation crane 8 installed on the replenishment ship transfers the replenishment cargo 3 from the deck of the replenishment ship to the position right above the deck of the ship to be replenished 1 through the hoisting, slewing, and luffing mechanism of the compensation crane. At the moment, an operator controls the lower part of the measuring hook 2 of the measuring winch 6 to be right above the deck of the ship to be supplied 1 through an operating valve handle on an operating platform of the compensation crane, and the operator on the ship to be supplied hangs the measuring hook on an ear ring of the deck. At the moment, the operator of the compensation crane starts the wave compensation function, the handle of the measurement winch 6 is always in the lifting position, so that the steel wire rope of the measurement winch is always in a tensioning state during wave compensation, and the measurement winch automatically ascends and descends along with the supplied ship 1 under the action of waves with constant tension. The hydraulic motor 9 is a power output element of the winch and controls the winding and unwinding of a steel wire rope of the measuring winch, when the supplied ship descends along with the wave, the hydraulic motor of the measuring winch is in a passive dragging state, and when the supplied ship ascends along with the wave, the hydraulic motor is supplied with oil by a hydraulic system and is in an active lifting state. A throttle valve 14, a balance valve 15 and an overflow valve 16 are installed on the motor valve group 10, the throttle valve 14 is used for adjusting oil inlet amount of a hydraulic motor, so that lifting speed of a steel wire rope of the winch is controlled, the balance valve 15 is used for locking and measuring the position of a lifting hook of the winch to prevent the lifting hook from slipping when the lifting hook is stopped in the air, when wave compensation is activated, the measuring winch is in a constant tension working mode, and the overflow valve 16 is used for adjusting the magnitude of constant tension and keeping the constant tension. The hydraulic motor 9 is mounted on a winch wall bracket 11 which is the main body support part of the winch. And a winding drum 12 is arranged in the middle of the wall frame and is used for storing and driving the steel wire rope to be wound and unwound. The tail end output shaft end of the winding drum is provided with a rotary encoder 13, when the steel wire rope of the winch moves along with the waves, the encoder transmits displacement data of the waves in the vertical direction to a control system CPU in real time, the CPU carries out program processing and operation and then transmits a control signal to a motor electric proportional valve of the supply winch to control the landing speed of supply goods relative to a deck, and therefore the purpose of wave compensation is achieved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a constant tension boats and ships displacement measurement device, its characterized in that, include the tender and by the tender, be equipped with the compensation loop wheel machine on the tender, be equipped with supply winch and measurement winch on the davit of compensation loop wheel machine, supply winch links to each other with the supply lifting hook through the wire rope that passes the pulley, and the supply lifting hook links to each other with the supply goods, and the measurement winch links to each other with the measurement lifting hook through the wire rope that passes the pulley, and the measurement lifting hook links to each other with the earrings on the tender deck, the measurement winch include hydraulic motor, the last motor valves that is equipped with of hydraulic motor, the motor valves include choke valve, balanced valve and overflow valve, hydraulic motor links to each other with the reel, and hydraulic motor and reel all install on the wall frame, still are equipped with the encoder on the hydraulic motor.

2. A constant tension vessel displacement measuring device as in claim 1, wherein the wall frame is provided with mounting holes at the bottom and is connected with the compensating crane through bolts.

3. A constant tension vessel displacement measuring device as in claim 1, wherein the hydraulic motor and the spool are bolted to the wall frame.

4. A constant tension vessel displacement measuring device as in claim 1, wherein the compensating crane comprises a hoisting mechanism, a slewing mechanism and a luffing mechanism.

5. A constant tension vessel displacement measuring device according to claim 1, including a control system, the control system being connected to the encoder.