In the construction of urban and rural power grids, in order to ensure the safe operation of the power grid, prevent accidents, and attract people's attention to unsafe factors, it is often necessary to arrange the target in some necessary places. The safety sign is a combination of color, graphics and text.
1 safe colorThe security color is the color used to express the meaning of the security information. The security color is defined as red, blue, yellow, and green. It is used to indicate prohibition, command, warning, prompt, and so on. Red is used to indicate prohibition, stop, and fire prevention. It is mainly used to prohibit signs, such as prohibiting closing, stopping, high-pressure danger, etc. It is also used to stop signals, such as stop buttons, parts that are prohibited from being touched. Blue indicates instructions and regulations. Yellow indicates warning and attention. Green indicates security, access, and is also used to activate the button.
In order to make the safety color more conspicuous, the safety color is generally not used alone, and the contrast color is often added to contrast. The contrast color used as the contrast color is black and white, white is used for contrast with red, blue and green, and black is used for yellow. Compared. In special cases, in order to express the meaning of reinforcement, red and white, blue and white, yellow and black stripes can also be used.
2 safety signsSafety signs are made up of security colors, geometry and symbols to express specific security information.
(1) Prohibition signs. It is mainly used to indicate that some people's behaviors are not allowed or stopped, such as prohibiting flammable materials, prohibiting smoking, prohibiting passage, prohibiting climbing, prohibiting fireworks, prohibiting leaps, prohibiting start-ups, and prohibiting water fires. The geometry of the prohibition sign is a ring with a slash, the slash is connected to the ring in red, the graphic symbol is black, and the background is white.
(2) Warning signs. Used to warn people of possible dangers, such as paying attention to safety, beware of fire, beware of electric shock, beware of explosions, beware of falling, be careful of arcs, beware of cables, beware of static electricity, beware of hot surfaces, beware of falling objects, beware of hanging objects, beware of vehicles, etc. The geometry of the warning sign is a black regular triangle, a black symbol, and a yellow background.
(3) Command mark. Used to indicate the commands that must be observed, such as wearing a safety helmet, wearing a safety belt, wearing protective shoes, wearing protective glasses, wearing protective gloves, and wearing overalls. The geometry of the command logo is a circle, a blue background, and a white graphic symbol.
(4) Prompt command. Used to indicate the direction of the target. The geometry of the logo is square, green, red background, white graphic symbols and text. The green background has safe passages, fire exits, emergency exits, safe havens, and safety stairs. Red backgrounds include fire alarms, underground fire hydrants, fire hydrants on the ground, fire extinguishers, fire pump couplings, fire alarm bells, etc.
(5) Supplementary signs. It is a supplementary explanation for the first four kinds of marks. There are two kinds of horizontal writing and vertical writing. The horizontal writing is rectangular. It is written below the mark and can be connected with the mark or separately. The vertical writing is written on the upper part of the sign pole. . The color of the supplementary mark, the vertical writing is black on white, horizontally written, the white text on the red background for prohibiting the mark, the black text on the white for the warning mark, and the white on the blue for the command mark.
There are also many regulations on the size of the safety sign. The size of the safety sign is closely related to the angle of view. The farther the observation distance is, the larger the sign is. Generally, the size of the sign can be calculated by the following formula:
S≥L2/2000
Where the area of ​​the S--safety sign geometry itself, m2
L--maximum observation distance, m
The circular diameter of the safety sign shall not exceed 400 mm at the maximum, the side length of the triangle shall not exceed 550 mm at the maximum, and the short side of the rectangle shall not exceed 285 mm at the maximum.
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