CN202643158U - Constant tension hoisting operation wave compensation device - Google Patents

Abstract

The utility model discloses a wave compensation device for hoisting with constant tension, which comprises a hydraulic winch for lifting heavy objects and a hydraulic motor for driving the winch; The piston accumulator group is connected to the outlet of the electromagnetic reversing valve of the oil supplement system, the piston accumulator is connected to the air source; the hydraulic motor is connected to the control oil source, and both sides of the control pipeline of the hydraulic motor are connected with anti Cavitation one-way valve; the lifting side pipeline of the hydraulic motor is connected with the balance valve and the pressure control plug-in, and the pressure control plug-in is controlled by the proportional overflow valve. The utility model has the advantages of simple structure, high compensation precision, wide compensation range and fast response speed.

Description

A constant tension hoisting operation wave compensation device

technical field

The utility model relates to a constant tension hoisting operation wave compensation device, in particular to a composite wave compensation device, which is used to reduce the influence of heave motion caused by waves on hoisting machinery and heavy objects.

Background technique

At present, wave compensation methods can be divided into two types: active compensation and passive compensation. One is a passive compensation device, which stores wave energy in an accumulator, and uses the accumulator to store and release energy to achieve heave compensation. This method is simple, has a wide range of compensation, and consumes almost no power energy, but its disadvantages are that the structure is larger and the compensation accuracy is slightly lower; the other is an active compensation device that drives the hydraulic motor of the winch through the oil supply of the hydraulic pump. The compensation power mainly comes from the compensation system. This method can adopt feedback control, which has high compensation accuracy, strong anti-interference ability, good adaptability, and stable compensation performance, but consumes a lot of power and costs high.

Utility model content

The purpose of this utility model is to provide a constant tension wave compensation device with simple structure, high compensation precision and wide compensation range, so as to solve the above-mentioned deficiencies in the technology.

The constant tension hoisting operation wave compensation device of the present utility model includes a hydraulic winch 2 for lifting heavy objects 11, a hydraulic motor 3 for driving the winch, and a braking device 1 matched with the hydraulic winch; the winch passes through the plunger cylinder 8 and the fixed pulley 17 , The moving pulley block 9 is connected with the weight; the plunger oil cylinder is connected with the piston accumulator group 10 and the outlet of the electromagnetic reversing valve 13 of the oil supply system, and the piston accumulator is connected with the air source 12; the hydraulic motor is connected with the control oil It is characterized in that both sides of the control pipeline of the hydraulic motor are connected with an anti-cavitation check valve 5; the lifting side pipeline of the hydraulic motor is connected with the balance valve 4 and the pressure control plug-in 6, and the pressure control plug-in 6 is controlled by proportional relief valve 7.

The wave compensation device for constant tension hoisting operation of the utility model adopts a compensation method combining passive compensation and active compensation, has the advantages of both compensation systems, has simple structure, high compensation precision, wide compensation range and fast response speed.

Description of drawings

Fig. 1 is the hydraulic principle diagram of the constant tension wave compensation device of the present invention;

Fig. 2 is a structural schematic diagram of the compensating oil cylinder in the constant tension wave compensating device of the present invention;

Detailed ways

As shown in Figure 1, the utility model includes a hydraulic winch 2 for lifting heavy objects 11, a hydraulic motor 3 for driving the winch, and a braking device 1 matched with the hydraulic winch, and the winch is driven by medium and high pressure hydraulic pressure.

The winch is connected with the weight through the plunger cylinder 8, the fixed pulley 17, and the movable pulley block 9; The source 12 is connected; the hydraulic motor is connected with the control oil source, and both sides of the control pipeline of the hydraulic motor are connected with an anti-cavitation check valve 5; the lifting side pipeline of the hydraulic motor is connected with the balance valve 4 and the pressure control plug-in 6 connect. All hydraulic components can be purchased according to the working conditions.

In this embodiment, the system adopts six-fold passive compensation, that is, the oil cylinder pulley block includes three moving pulleys 9 installed in front of the compensation oil cylinder plunger 15 and four fixed pulleys 17 installed on the oil cylinder body 16, and the effective compensation stroke of the compensation oil cylinder is Six times the stroke of the compensation cylinder. A guide rod 14 is installed on the compensation oil cylinder to play a role of safety guide. The balance valve 4 can block the oil in the motor oil circuit to maintain a certain back pressure. The anti-cavitation check valve 5 replenishes oil for the system oil circuit to ensure that no cavitation occurs in the hydraulic system and prevent system failure caused by internal leakage of the oil circuit.

The working process is as follows: before the winch 2 works, the drum brake device 1 is opened by an independent button, and then the motor 3 operates the winch to run. When the hoisting winch needs wave compensation, open the air source 12 to fill the piston accumulator group 10 with high-pressure nitrogen, then press the corresponding button to operate the reversing valve 13 to replenish oil for the compensation cylinder 8 and the accumulator group 10, When the oil replenishment pressure is reached, the oil replenishment work is stopped by the system control. At this time, the compensation system can perform constant tension compensation, and the compensation form is passive compensation. The system does not need to consume energy, and the compensation range is wide. After the compensation work is finished, the reversing valve 13 is operated to discharge oil for the compensation cylinder 8 and the accumulator group 10 . When encountering harsh working conditions or super-working conditions, beyond the range of passive compensation, active compensation can be used to achieve constant tension. The realization of the constant tension is controlled by the pressure control plug-in 6 and the proportional relief valve 7. The system calculates the required constant tension according to the operating conditions and the weight of the heavy object, and then controls the opening size of the proportional relief valve 7 by electrical logic to realize the constant tension. .

When the weight 11 rises, the weight of the load on the rope becomes lighter, and the passive compensation starts to work. When it exceeds the range of passive compensation, under the action of the lifting side pressure, the winch tightens the wire rope to keep the rope in tension; when the weight falls When a certain pressure is reached, the proportional relief valve 7 overflows, the pressure control plug-in 6 opens, and part of the oil on the lifting side flows back to the oil tank, so that the relative position of the heavy object and the hoisting machinery remains unchanged, realizing Heave compensation function.

The utility model realizes constant tension compensation by combining active and passive compensation, improves the range and corresponding speed of wave compensation, ensures that the corresponding steel wire rope is in a certain tension state, and maintains constant tension.

Claims (1)

1. A wave compensation device for constant tension hoisting operations, comprising a hydraulic winch (2) for lifting heavy objects (11), a hydraulic motor (3) for driving the winch, and a braking device (1) matched with the hydraulic winch; the winch passes through The plunger oil cylinder (8) is connected with the fixed pulley block (17) and the movable pulley block (9) with the weight; the plunger oil cylinder is connected with the outlet of the piston type accumulator (10) and the electromagnetic reversing valve (13) of the oil supply system, The piston accumulator is connected to the air source (12); the hydraulic motor is connected to the control oil source, and the characteristic is that the control pipeline of the hydraulic motor is connected with an anti-cavitation check valve (5); The hoisting side pipeline is connected with the balance valve (4) and the pressure control plug-in (6), and the pressure control plug-in (6) is controlled by the proportional relief valve (7).

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