Intrinsic safety measures for the design and manuf

Intrinsic safety measures for mechanical design and manufacturing

1. Equipment reliability

reliability refers to the ability of a machine or its parts to perform specified functions without failure under specified service conditions and within a specified period of time

(1) specified service conditions. This refers to the space constraints considered in the mechanical design, including environmental conditions (such as temperature, pressure, humidity, vibration, atmosphere, and the expansion of the loss range of paper enterprises, corrosion, etc.), load conditions (load, voltage, current, etc.), working mode (continuous or continuous work), transportation conditions, storage conditions, use and maintenance conditions, etc

(2) specified time. This refers to the time index of the product specified in the design of mechanical equipment, such as service life and validity period. Mileage, times of action, etc

(3) specified functions. This refers to the performance index of mechanical equipment, which is the sum of several functions of the machine, rather than the function of one component or part

reliability should be the basis for the completeness of safety functions. This principle applies to machine parts and components. Improving the reliability of the machine can reduce the dangerous failure rate, reduce the number of times that need to find faults and overhaul, and do not cause the machine to malfunction due to failure. Therefore, w2=0.05g2/hz can reduce the probability of the operator facing danger

2. Adopt mechanization and automation although their role is very important. In the production process, mechanical equipment is used to supplement, expand, reduce or replace human labor, which is called the mechanization process. Automation is a step further, that is, machinery has the function of automatically processing data. Mechanization and automation technology can keep people's operation Posts away from dangerous or harmful sites, so as to reduce industrial accidents and prevent occupational diseases; At the same time, it also puts forward more comprehensive quality requirements for the operators

(1) operation automation. In dangerous positions or production processes that are forced to participate continuously at a specific pace of the machine, robots or manipulators are used to replace human operations, so that working conditions continue to improve

(2) loading, unloading and handling mechanization. Loading and unloading mechanization can be achieved by means of workpiece feeding slide, manual indexing workbench and other measures; The automation of handling can be realized by using industrial robots, manipulators, automatic feeding devices, etc. This can limit the risks caused by handling operations and reduce the contact injuries such as heavy objects falling, bumping, impact, etc. During loading and unloading, attention should be paid to prevent the danger caused by the obstruction between the device and machine parts or processed materials, as well as the danger caused by troubleshooting

3. Safety of adjustment and maintenance

when designing the machine, we should try to design some vulnerable parts that need to be replaced frequently to facilitate disassembly and replacement; Provide safe access or standing measures (ladders, platforms, passages); Lock the cut-off power; The adjustment, lubrication, general maintenance and other operation points of the machine are configured outside the danger zone, which can reduce the need for the operator to enter the danger zone, thus reducing the probability of the operator facing danger