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Crawler crane rotation protective device resistant to wind and waves and capable of achieving limited region automatic circulation

A protection device, crane technology, applied in the direction of crane, accumulator device, fluid pressure actuating device, etc., can solve the problems of shortening the effective working time of the window, reducing the working efficiency, etc., so as to improve the working efficiency of hoisting and increase the difference Sex, time-saving effects

Active Publication Date: 2019-09-17
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This virtually shortens the effective working time of the window and reduces work efficiency

Method used

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  • Crawler crane rotation protective device resistant to wind and waves and capable of achieving limited region automatic circulation
  • Crawler crane rotation protective device resistant to wind and waves and capable of achieving limited region automatic circulation
  • Crawler crane rotation protective device resistant to wind and waves and capable of achieving limited region automatic circulation

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Comparison scheme
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Embodiment Construction

[0038] figure 1 A schematic diagram of a hydraulic system of a crane slewing protection device according to an embodiment of the present disclosure is shown. Such as figure 1 , The crane slewing protection device includes the first electromagnetic directional valve 16, 17 added between the original hydraulic control or electric control slewing main directional valve 1 and the oil circuit of the hydraulic motor 2, 3. The present disclosure does not limit the number of hydraulic motors (swing motors). An upper hydraulic oil tank 7 is added above the hydraulic motors 2 and 3, which can be inflated and pressurized. Between the hydraulic oil tank 7 and the two main oil circuits of the hydraulic motors 2 and 3, the first safety valves 8, 9 and the second safety valves are added. One check valve (suction valve) 10,11.

[0039] The first safety valves 8, 9 are used to protect the hydraulic motors 2, 3 to avoid damage to the motors caused by overload pressure shocks. The pressure o...

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Abstract

The invention relates to a crawler crane rotation protective device resistant to wind and waves and capable of achieving limited region automatic circulation. The crawler crane rotation protective device comprises two first electromagnetic reversing valves which are arranged on two main oil ways of hydraulic motors and a connection pipeline of a main reversing valve, a hydraulic oil tank connected with the two main oil ways of the hydraulic motors, two first safety valves which are arranged on the two main oil ways of the hydraulic motors and a connection pipeline of the hydraulic oil tank, a damping unit which is used for connecting the two main oil ways of the hydraulic motors to be connected together so that impact and shaking energy can be reduced and absorbed, two pressure sensors arranged on the two main oil ways of the hydraulic motors correspondingly, a rotation brake in the normally open state, and a controller, wherein the controller is used for controlling the damping unit to distribute high damping and low damping of the main oil ways of the hydraulic motors, then, the damping difference is formed between the two main oil ways, and the upper portion of a crane is subjected to differential damping rotation, or alternatively subjected to free damping rotation and differential damping rotation.

Description

technical field [0001] The disclosure relates to a slewing protection device for automatic circulation in a limited section of a crawler crane against wind and waves, which can be applied in offshore wind power construction technology. Background technique [0002] When wind power is installed at sea, the crawler crane works on the ship, and when the tide is low, it sits on the beach. At this time, the chassis of the crawler crane is stable, but the beach will cause damage to the hull structure. [0003] When the crawler crane is out of service, due to the surge and strong wind, the crane will sway up and down, which is especially unfavorable for the slewing system, and it is easy to cause damage to the slewing reducer, slewing pinion, and slewing ring gear. In the long pole working condition, the constant shaking, the impact on the structure of the slewing transmission system and the repeated alternation will cause the gears to be damaged or even broken. There is no link t...

Claims

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Application Information

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IPC IPC(8): B66C23/86B66C23/88B66C23/94F15B1/02F15B11/16F15B13/06F15B20/00F15B21/14
CPCB66C23/86B66C23/88B66C23/94F15B1/024F15B11/16F15B13/06F15B20/007F15B21/14F15B2211/205F15B2211/212F15B2211/71F15B2211/86F15B2211/88
Inventor 董武李前国赵恒郭军郭际洲
Owner CHINA FIRST METALLURGICAL GROUP
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