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Protection system for luffing mechanism of portal crane

A portal crane and luffing mechanism technology, which is applied to cranes, trolley cranes, mechanical equipment, etc., can solve the problem of heavy workload, inability to effectively detect the oil outlet situation of the lubricating pipeline, and no detection and protection of the screw type luffing mechanism and other issues to achieve the effect of protecting equipment safety and avoiding personnel and property losses

Active Publication Date: 2021-06-25
SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional protection method is usually to install a pressure or flow detection switch at the lubricating oil outlet on the luffing screw lubrication pump station. This protection method cannot effectively detect the actual oil output of each lubricating pipeline; even if the lubrication is normal, the luffing screw The copper nut and screw rod inside will also wear out after long-term use, resulting in changes in mechanical load, but these mechanical changes cannot be displayed through intuitive data, because the luffing mechanism must be disassembled to determine the wear and mechanical fit of the copper nut. huge workload
The existing domestic large-scale portal cranes do not have a complete method for fully lubricating oil circuit detection and protection for the screw-type luffing mechanism, and also lack a state detection and protection system for this type of mechanical mechanism during operation

Method used

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  • Protection system for luffing mechanism of portal crane
  • Protection system for luffing mechanism of portal crane
  • Protection system for luffing mechanism of portal crane

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing.

[0021] see figure 2 , Structure diagram of screw luffing mechanism. There are generally 3 lubrication points on the entire screw luffing mechanism. The oil circuit branch of the total lubricating oil pipe is a lubricating point inlet 11, a lubricating point inlet 12, a lubricating point inlet 13, and a lubricating oil outlet 14. Lubricant oil is supplied to the copper nut 21 in the luffing screw, the luffing screw 22 and the open gear through the oil supply at the above three points. The traditional detection position is at the position of the main oil inlet, and the monitoring signal is a switch signal, and there is no specific lubricating oil flow signal. Only rely on a switch signal (on, off) to sense the running state of the lubrication system. There are the following problems: the flow signal is a switch signal (ON / OFF) signal, and the specific flow size cannot be...

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Abstract

The invention discloses a protection system for the luffing mechanism of a portal crane. The luffing mechanism of the portal crane includes a plurality of lubricating oil inlets and a lubricating oil outlet. The protection system includes: respectively used for collecting each lubricating oil inlet and lubricating Multiple flow sensors for lubricating oil flow at the oil outlet; inclination sensors for collecting the amplitude of the boom boom of the crane; hall sensors for collecting the current of the crane motor; PLC for receiving lubricating oil flow, amplitude and current. Realize the detection and early warning of the lubrication state of the luffing mechanism, and can judge the operating state of the mechanical structure of the equipment.

Description

technical field [0001] The invention relates to a protection system for a luffing mechanism of a portal crane. Background technique [0002] The screw luffing mechanism of large portal cranes (32t and above) must have good lubrication during operation. The traditional protection method is usually to install a pressure or flow detection switch at the lubricating oil outlet on the luffing screw lubrication pump station. This protection method cannot effectively detect the actual oil output of each lubricating pipeline; even if the lubrication is normal, the luffing screw The copper nut and screw rod inside will also wear out after long-term use, resulting in changes in mechanical load, but these mechanical changes cannot be displayed through intuitive data, because the luffing mechanism must be disassembled to determine the wear and mechanical fit of the copper nut. The workload is enormous. The existing domestic large-scale portal cranes do not have a complete method for fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16N29/04B66C19/00B66C15/06
CPCB66C15/065B66C19/00F16N29/04
Inventor 陈浩唐辉顾颂英李珊珊何宏剑焦镇
Owner SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD