Electric lighting on the facry floor

　　Since my country's reform and opening up in the 1980s, my country's economic construction has developed rapidly, and various aspects of economic construction have been carried out under the upsurge of reform and opening up throughout the country. The boom in economic construction has also promoted the rapid development of various industries in our country. The industrial output value has continued  increase, and exports have also continued  hit new highs. These industrial products are produced through the hard work of workers in facries. As the base of industrial production, the facry buildings are also constantly moving forward. Modern production buildings and modern lighting facilities have been applied  the current stage of facry construction.

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　　Since a large number of facries need  perform continuous operations during production, the requirements of the facries for lighting have increased. How  meet the needs of modern facry lighting, start with the specification requirements of facry lighting and electrical control design, and explain the new requirements and trends in the development of modern facry lighting systems.

　　1. The facry's requirements for the lighting system

　　A facry is a place where established industrial products are produced. Because industrial products are so different, the requirements for the lighting system of the facry are also different. Industrial plants generally include production workshops, offices, and various ancillary buildings. In addition, there are roads, stations or other devices connected  the facry. Different areas have different requirements for area lighting. For example, the workshops we just mentioned generally have the characteristics of continuous operation. The lighting system is required  work uninterrupted for a long time. If there is a problem with the lighting, it will cause damage  the production. A good workshop lighting system is  ensure product quality and The most basic guarantee for work efficiency. In addition, different plant structures have different requirements for lighting. For example, single-sry industrial buildings and multi-sry industrial buildings have different requirements for lighting. Single-srey industrial buildings generally have higher sreys and require higher illumination. Generally, lamps installed on the roof truss are used  achieve the purpose of lighting, while the sreys of multi-srey buildings are not very high, and fluorescent lamp sets are generally used. Lighting scheme. These are all realistic needs and the environment are closely related, and a unified conclusion cannot be made. However, in design and construction, srey height is only one aspect that needs  be considered in lighting design, and the span of plant structure is also an important facr that needs  be considered in electrical design.

　　Due  the different uses of the workshops, the workshops are divided in workshops produced in normal environments and workshops with special production requirements. For example, workshops with explosive or fire media. More facrs need  be considered when designing, and production in harsh environments The dusty, humid, high temperature or steam, vibration, smoke, acid-base corrosive gas or substance, and the production plant with radioactive substances have special characteristics for the selection of lamps. These facrs have a great relationship with the choice of lighting system and wiring. This article will not go in details here.

　　Second, the choice of lighting fixtures and the choice of light sources

　　The lighting design of the facry covers a wide range, generally including indoor lighting and outdoor lighting of the facry. The exterior lighting can be divided in outdoor installation lighting, station and field lighting, and underground, road, guard, and obstruction lighting.

　　Indoor lighting includes lighting inside the facry and office areas; outdoor lighting is mainly used for outdoor lighting measures, such as tanks, reaction wers, pipes, etc. placed outdoors by petrochemical companies; lighting for stations and yards For example, passenger stations, railway freight stations, etc.; underground lighting includes a variety of basements, tunnels, and tunnels used for srage; road lighting is mainly facry roads and public areas of dormiries; guard lighting is mainly used for guarding areas along the periphery of the facry The lighting measures installed; obstacle lighting is mainly aimed at the ultra-high buildings, structures and chimneys in the facry area.

　　Regarding the choice of lighting method, if the illumination requirements are high and the working position density is not high, the mixed lighting method will generally be selected. If the requirements for the work are not high, and the area is not suitable for installing local lighting, then Use general lighting. The specific situation should be based on the needs of the work  choose the mode of mutual assistance between local lighting and general lighting  carry out the lighting design work.

　　The illuminance value of facry lighting design has national standards, such as the national standard GB 50034-2004 "Architectural Lighting Design Standard". The standard specifies the illuminance value of general lighting for sixteen major types of industrial buildings. The illuminance standards of the more specific workplaces of various facries should also be in accordance with the regulations of the relevant industry.

　　Lighting quality is a standard for measuring the quality of facry lighting design. Its main content also includes how  choose high-efficiency lamps. Specific measures can be selected according  the height of the lamps hanging in the facry. For example, when RI=0.5～0.8, Narrow light distribution lamps should be used. When RI=0.8～1.65, medium light distribution lamps should be used. When RI=1.65～5, wide light distribution lamps should be used; the color temperature and color rendering index should be selected in the light source selection. The lighting source required by the production; the illuminance of not less than 0.7 should be reached in the working area, and the illuminance of the adjacent area should not be less than 0.5; the glare should be dealt with, under normal circumstances, control the limit value within 22, if it is used as For fine processing needs, it should be controlled at 19; in addition  the above methods, reducing voltage fluctuations is a facr that must be considered when the lighting device works under the allowable voltage; for ordinary lighting requirements, we generally use induction lamps in the design. , Tri-color fluorescent lamps, metal halide or high-pressure sodium lamps are generally used in places with higher floor heights or sites that require large-scale irradiation. The choice of light source is based on the principle of meeting work needs and energy saving; Facry lighting branch line generally adopts the method of laying insulars (or porcelain pillars) with insulated wires along (or across) the roof truss. When the large-span plant roof structure adopts the grid type, in addition  the above methods, insulated wires or cables can be laid along the grid through steel pipes. The lighting circuits of explosion and fire hazard workshops generally use copper core insulated wires  pass through water gas steel pipes.

　　Third, the development trend of facry lighting system

　　The continuous advancement and development of science and technology has also brought new development opportunities  industrial lighting. The development of lighting technology represented by LED lighting has made the industrial lighting system further develop in the direction of low energy consumption, high light efficiency and intelligence. This is closely related  the needs of industrial lighting itself. First of all, industrial lighting consumes a lot of electricity, and the biggest feature of LED lighting is that it can save electricity, which is in line with the country’s energy-saving and emission-reduction measures. Therefore, the penetration rate of LEDs in industrial lighting It has also been gradually improved, but