Double hook hoisting crawler crane and its force limiter safety protection control method and device
A safety protection device and technology of crawler cranes, which are applied to cranes and other directions, can solve the problems of high cost and inaccurate measurement of the lifting weight of the main arm and jib of the force limiter, and achieve the effect of practical and effective safety protection.
Active Publication Date: 2018-01-23
XCMG CONSTR MACHINERY
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a force limiter safety protection control method and device for a crawler crane hoisted with double hooks, which solves the problem of the main arm and auxiliary arm of the force limiter hoisted by double hooks in the prior art. Technical problems with inaccurate or costly weight measurements
Method used
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[0026] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0027] At first the technical terms used in the present invention are explained:
[0028] Crawler crane: a crane with a lattice boom structure using a crawler chassis.
[0029] Fixed jib: The truss jib system installed on the top of the main jib on the crawler crane and at a fixed angle to it, the angle between it and the main jib cannot be changed during the operation.
[0030] Performance table: The hoisting performance table is a parameter file to guide the hoisting. All cranes have a hoisting performance table. The hoisting performance table is required when making a hoisting plan, and must also be used in the actual hoisting process.
[0031] Such as figure 1 and figure 2 As shown, the...
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The invention discloses a crawler crane with double hooks for hoisting and a load limiter safety protection control method and device. The method comprises the following steps: assuming that a virtual hook is perpendicularly arranged at the center of the total length of a fixed jib, calculating to obtain the rated elevating capacity at the position of the virtual hook and saving as a performance table; collecting stress applied to a boom luffing pulling board, the inclining angle of a boom support and the inclining angle of a fixed jib support and calculating to obtain the actual elevating capacity at the position of the virtual hook; calculating the ratio of the actual elevating capacity at the position of the virtual hook to the rated elevating capacity in the performance table to obtain a load rate; judging whether the load rate exceeds the preset value, and if yes, sending an alarm message or stopping operation. According to the crawler crane, the main hook and the assistant hook are used for hoisting alternatively or in combination, which is equivalent to that the virtual hook at the center of the fixed jib is used for hoisting to obtain the actual elevating capacity of the virtual hook, and the rated elevating capacity of the virtual hook is subjected to moment limitation, so that a simple and economic scheme is used to provide practical and effective security protection to the crawler crane.
Description
technical field [0001] The present invention relates to a force limiter safety protection control method for a crawler crane hoisted with double hooks, a safety protection device for a force limiter for a crawler crane hoisted with double hooks, and a crawler crane with a double hook hoisting including a safety protection device for a force limiter , belongs to the technical field of crane equipment. Background technique [0002] At present, crawler cranes at home and abroad have made great progress in terms of functionality, safety, and intelligence, and are widely used in various industries. Crawler cranes belong to mobile cranes. It is a construction machine that installs the lifting operation part on the crawler chassis and relies on the crawler device to walk. It is mainly suitable for lifting operations of medium and large projects. [0003] A crawler crane hoisted by double hooks, such as a crawler crane that can be hoisted by double hooks disclosed in patent CN20141...
Claims
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IPC IPC(8): B66C23/36B66C23/90
CPCB66C23/36B66C23/905
Inventor 崔丹丹孙起贵李聪
Owner XCMG CONSTR MACHINERY