First, the content material summary:
To test the familiarity of the candidates with the types of risk factors and mechanical intrinsic security requirements of main products and locations during the produce and utilization of equipment.
Second, the key points, challenging factors:
(1) Understand the primary groups of mechanical items;
(2) Understand the intrinsic safety requirements of mechanical style and the type of safety gadget of the machine;
(3) Familiar with the boiler area, air compressor place, gas train station, oxygen train station, acetylene train station dangerous point and general safety technology management requirements.
Third, the content points out:
Machinery is a gadget that is assembled by a number of interconnected parts and can perform certain functions. During the procedure of the mechanical gear, at least some of the essential contraindications motions are made according to specific rules. The total mechanical gadget contains a perfect mover, a control and control system, a transmission system, a support device and an actuator.
Equipment is an essential products in modern production and life. While bringing high performance, rate and convenience to people, the machine also brings mechanical damage such as effect, extrusion, slicing and other non-mechanical dangers such as electric surprise, noise and high heat during its produce, procedure and make use of.
The task of mechanical safety is to take system measures to ensure the safety and health of V belt pulleys workers in the entire process of production and use of machinery, from various hazardous factors. Mechanical safety includes two factors of the safety of mechanical product processing and the protection of mechanical devices.
1.1, mechanical item production safety
(1) Primary groups of mechanical products
There are many types of mechanical products. The main products of the machinery industry are as follows:
(1) Agricultural equipment: tractors, internal combustion engines, planters, harvesting equipment, etc.
(2) Large mining equipment: metallurgical machinery, mining machinery, lifting machinery, launching and unloading equipment, commercial and mining vehicles, cement apparatus, etc.
(3) Construction equipment: forklifts, earthmoving equipment, compaction equipment, concrete machinery, etc.
(4) Petrochemical general machinery: oil drilling and mining machinery, oil refining machinery, chemical substance machinery, pumps, fans, valves, gas compressors, refrigeration and atmosphere conditioning machinery, paper machinery, printing machinery, plastic processing machinery, pharmaceutical machinery.
(5) Electric machinery: power generation machinery, transformers, electric motors, high and low voltage switches, wire and cable, batteries, electric welding devices, household devices, etc.
(6) Machine tools: metallic reducing machine equipment, forging devices, foundry equipment, woodworking equipment, etc.
(7) Autos: trucks, road buses, vehicles, modified cars, motorcycles, etc.
(8) Instrumentation: automated devices, electric equipment, optical devices, component analyzers, automotive instrumentation, electric tools, audio-visual equipment, cameras, etc.
(9) Basic equipment: bearings, hydraulic parts, seals, powder metallurgy products, standard fasteners, industrial chains, armor and weapon upgrades, molds, etc.
(10) Packaging machinery: packaging machinery, metal packaging items, metallic containers, etc.
(11) Environmental protection machinery: water pollution prevention equipment, air pollution prevention equipment, solid waste materials treatment equipment, etc.
(12) Additional machinery.
The primary products of the non-mechanical industry include railway equipment, construction equipment, textile equipment, light commercial machinery, and maritime machinery.
(2) Mechanical safety style and machine safety device
Mechanical safety includes safety at all stages of design, manufacturing, installation, adjustment, use, maintenance, and disassembly. Protection design minimizes risk. Mechanical basic safety style refers to the proper form and essential contraindications position from the part materials to the part in the mechanical style stage, from restricting the operating pressure, the quality and rate of the moving parts to reducing noise and vibration, using intrinsic security technology and power supply, applying zero The theory of compelled mechanical action between elements, combined with ergonomic desk principles and other steps, avoids or reduces the risk by selecting suitable style structures; it can also improve the reliability, procedure mechanization or automation of the apparatus and Methods such as modifications and maintenance outside the danger zone to avoid or reduce the risk.
Intrinsically safe
Inbuilt safety is definitely a mechanical safety method that is adopted by mechanical designers to take measures to eliminate mechanical hazards during the design phase.
1) Adopting intrinsic safety technology
Intrinsically safe technology refers to the design and manufacture of mechanical predetermined functions by using this technology. It can satisfy the basic safety requirements of the machine itself when performing predetermined features of the machine under established 
conditions without using other safety safety measures. These include: staying away from razor-sharp sides, sharp sides and bulges; ensuring adequate basic safety distances; determining limits on physical quantities; using intrinsically safe procedures and power resources.
2) Limit mechanical stress
The mechanical stress of the mechanical parts does not exceed the permissible value and a adequate safety factor is guaranteed.
3) Protection of components and materials
Materials, fuels, and components used to produce machinery need to not endanger the safety or health of workers during use. The mechanical properties of the material, such as tensile power, shear strength, effect strength, produce limit, etc., should match the load requirements for performing the meant function; the materials should end up being able to endure the predetermined environmental circumstances, such as corrosion resistance, ageing level of resistance, and resistance. The capability to put on; the material should have uniformity, prevent the metallographic structure of the material from being uneven due to unreasonable process style, and generate residual tension; at the same time, avoid using harmful materials or chemicals, and should avoid the equipment itself or credited to use. The risk of fire and explosion from fumes, liquids, dust, vapors or additional chemicals produced by particular materials.
4) Fulfilling basic safety ergonomic principles
In the mechanical design, the security man-machine design principle is fulfilled by rationally distributing human-machine functions, adapting to human body characteristics, man-machine interface design, work space layout, etc., improving the operability and reliability of mechanical gear, and producing the operator's physical strength Usage and psychological tension are reduced, thereby reducing operational mistakes.
5) Safety concepts for designing control systems
During the usage of equipment, the usual harmful conditions are: accidental start, out of control of speed alter, movement can not really stop, moving mechanised parts or workpieces fall off, the function of protection gadgets is certainly clogged. The style of the control system should take into account the operating modes of the numerous procedures or the use of mistake screen devices so that the operator can deal with them securely.
6) Prevent the hazards of pneumatic and hydraulic systems
Devices that make use of pneumatic, hydraulic, heat, and other gadgets must be designed to avoid the potential dangers associated with pet release of these energies.
