The reliability and effectiveness of the safety monitoring and management system of hoisting machinery for protection and control devices

Source: Internet
Author: User

As a special equipment with high risk, the reliability and effectiveness of hoisting machinery safety monitoring and management system are directly affecting the safety and usability of hoisting operation. Therefore, in the process of design, manufacture, installation, use and safety technical inspection of the control device of hoisting machinery, it is necessary to make its reliability and validity as a very important index.



1. Overview of safety control device for hoisting machinery

Safety protection control device is an important part of the hoisting machinery security device. At present, in the hoisting machinery industry, the general use of overload protection device, anti-collision device, anti-shock warning device, anti-tipping device, wind early warning device. These safety control devices are usually made up of three parts:

(1) Detection part: Force sensor; angle or length sensors; optical signals, infrared signals, laser signals and other detection systems; High-voltage electrical detection system; Wind wind speed detection system.

(2) two times Instrument alarm control system: Microcomputer Intelligent alarm control system.

(3) Mechanical installation and joint parts.

With the development of intelligent automation and microcomputer technology, through the application of various advanced detection methods and microcomputer control technology, the formation of a centralized monitoring system, which will also improve the safety and reliability of lifting machinery and effectiveness.


2. Reliability and effectiveness of safety control device for hoisting machinery

The intrinsic safety of the safety control device of lifting machinery is very important. The concrete embodiment should be the reliability design of various functions and the validity in actual use. In the concrete implementation of reliability and validity, the reliability should be the center of design and manufacture. Maintenance in use, centered on effectiveness. In reliability technology, it shows inherent reliability and reliability of use.

2. 1 Requirements for designers and producers

It is a fundamental problem to realize the safety of hoisting machinery that the reliability and effectiveness index of safety control device is used throughout the whole process of design, manufacture and use. Take the national standard gb12602-1991? Safety Technical specification of overload protection device for hoisting machinery, for example, the specified reliability index. should be able to ensure that the device under the specified conditions of use, cumulative work for 3,000 hours, must not malfunction. The specified conditions of use refer to the crane working according to normal conditions, and the user shall maintain and adjust the device according to the adjustment method and cycle prescribed by the manufacturer; Product adjustment cycle shall not be less than 3 months, the warranty period shall not be less than 18 months? This is a hard indicator of effectiveness. For the protection of the control device, from the designer and manufacturer's point of view, in the following aspects of strict checks to ensure its inherent reliability.

1) Reliability Design technical measures

Designers should take the reliability design technology as the starting point, including the establishment of reliability indicators; Selection and selection of components; Basic safety function design; Electrical performance design; Environmental stress adaptability design; Mechanical Performance Design (sensor and other detection elements of the application form, installation, mechanical interference, etc.); Anti-interference and over-stress protection design; fault detection effect design; Redundant design of software and hardware; maintainability, usability and safety design. And the reliability test should be carried out in the design process, such as strength test; Failure analysis; Reliability evaluation, reliability design examination and prototype field trial feedback information analysis.

2) Reliability Manufacturing technical measures

The manufacturer shall ensure the concrete implementation and embodiment of the reliability design plan in the aspects of production capacity, production equipment, production process technology, inspection and inspection technology to ensure the quality of production, quality of production technicians, production management level and so on.

3) Selection and selection of components in the manufacturing process

In the manufacturing process, the purchase of parts should be selected and screened, including life screening, environmental stress screening, sealing screening, screening, etc., which is to ensure the inherent reliability of the basic factors.

4) The new product should carry on the industrial test

The industrial test is necessary to eliminate the unfavorable factors of early failure. Through the industrial test, to find out the design, manufacture, installation and applicability of the crane and many other aspects of the shortcomings, to improve. The improved product shall be guaranteed to operate continuously within the prescribed adjustment and maintenance cycle and shall not malfunction. And should be in the factory before the factory test, to remove the early failure of the components. such as gb12602-1991 in the 500-hour industrial operation Test, and set out the contents of the factory test.

5) Information provided to the user

The manufacturer and the designer shall provide the user with the product instruction manual, circuit diagram and installation drawings. The operating instructions should include the following:
Source: http://www.beijingkde.com/


The reliability and effectiveness of the safety monitoring and management system of hoisting machinery for protection and control devices

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