Prepainted Stainless Steel coil Why choose prepainted stainless steel?
1. Reduce light pollution: The coating can solve the impact of large-area stainless steel light panels on surrounding buildings.
2. Resolve galvanic corrosion: the surface of stainless steel has dust or foreign metal particles attached to it. Galvanized steel purlin and stainless steel ,in moist air, the condensed water between the two will be connected. As a microbattery (potential difference), it will trigger an electrochemical reaction and accelerate the corrosion and perforation of the contact points. After the stainless steel is coated with an organic coating, it forms insulation and prevents galvanic corrosion.
3. Prevent chemical corrosion: In polluted air (such as the atmosphere containing a large amount of sulfide, carbon oxide, and nitrogen oxide), it will form sulfuric acid, nitric acid, and acetic acid liquid spots in the case of condensed water, which can cause chemical corrosion, especially in coastal areas and In islands, the corrosion performance of chlorinated steel solution on stainless steel is weak, and the annual corrosion rate of austenite in salt water is at least 0.05-0.5mm, and there is a tendency for pitting corrosion and stress corrosion cracking. After the stainless steel is coated, it can isolate the contact of the corrosive medium with the surface of the steel plate.
4. Reflect the individuality of the building: the color or texture of the roof and wall can be customized according to the user's requirements.
Prefinished Stainless Steel,Color Stainless Steel Coil, Prepainted Stainless Steel Sheet,Stainless Steel Coil With Color Shandong Wofeng New Material Co., Ltd. , https://www.wofengcoil.com
Manual siren without power supply principle analysis
Hand-crank horns require no power and can provide an effective alarm in all locations where there is no power supply support. Only by manually shaking the handle clockwise in the hand, the speed reaches the primary (50-80 r / min) can achieve the desired alarm effect, the sound produced is sharp, powerful shock, strong penetration. The size of the alarm sound depends on the speed at which the handle is shaken. The new hand-crank alarm sets a shutter shutter mechanism in the sound window that can quickly close the sound window, block the sound, and produce different signals. (Older products don't have this feature!)
Hand series
The hand alarm is small, light, portable, and easy to install. No tools are needed. Only 0.15 square meters of dough and people standing can be normal operation, liquidity operations are very strong.
Civil defense,*, detention centers, prisons, mines, airports, pastures, oil depots, warehouses, hotels, hotels and other business units use an ideal alarm device in the event of a critical situation in critical locations.
The use of hand alarm
Mostly used for emergency emergency warning, its products are easy to carry, mainly used for flood control, disaster prevention, forest firefighting, military supplies, public and industrial occasions to respond to emergency alarms.
The principle of traditional alarm
The principle of traditional alarms is to use vibration sensors. Once the sensor receives the vibration signal, it will automatically alarm. In this way, thunder and rain, or cat and dog touch, and even other vehicles parked together, may cause alarm response.
Hand siren principle
The hand-cranked alarm is manually rotated by a crank, and the gear box is accelerated step by step, and then the drive block drives the sounding wheel to run at a high speed. In the process of high-speed operation, the sounding wheel generates high-speed and high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high-pressure high pressure
Because it is a hand-cranked alarm , the primary speed of the hand determines the sound effect of the alarm. Speed ​​and sound effects are proportional to each other. Relatively speaking, the higher the speed, the louder the sound. There is a difference between people shaking the alarm. The height of people, the size of their strength, and the speed of shaking are all direct factors that affect the sound effect of the siren. Therefore, we have made macro regulations here. The initial speed of shaking should not be less than 90 r/min. Sound effects.