Description:
Ultrafine fiber filtration material made by advanced production technology is widely used in surgical masks, protective masks,dust masks, etc. Products comply with the standard of GB6223-86UDC614.89, US 42CFR84, EU EN149 standard. We have regular stock of N95, N99, N100, 91, 92, 93. And we can also develop and produce various kinds of protective respirator materials according to clients` requirements
Feature:
High strength, small difference at longitudinal and longitudinal direction .Acid, non-toxic, non-radiation, harmless to human physiology;
With excellent breathability;
Meltblown Nonwoven Fabric Meltblown Nonwoven Fabric,Nonwoven Filter Material,Meltblown Nonwoven Filter Fabric,Meltblown Air Filter Fabric Shenzhen China Textile Filters , https://www.ctfiltech.com
Buried weather protective cover and installation precautions 1. Before burying all-weather protective cover in the ground, it is necessary to dig a hole with a slightly larger size than the buried weatherproof protective cover (for cement mortar after installation) and a metal protective sleeve through the cable. The groove is embedded with a cable metal protection sleeve, and the metal protection sleeve is filled with cement mortar (note that the metal sleeve is compatible with the depth of the protective cable cable entry device).
2. Before the buried shield is buried in the hole, the camera and lens must be debugged. The cable is not penetrated into the metal casing first, but is adjusted to obtain the required viewing angle and clear image, and then the underground weatherproof protective cover is sealed and buried underground. When debugging the camera or lens, the drawer board can be pulled out from the upper part of the cylinder. After the debugging confirmation, the control panel of the heating and air conditioning system is fixed on the camera with space.
3. First of all, the cable introduction device is sealed. The cable can be determined according to the length and with little margin. It does not penetrate the metal casing and can be carried out in a good indoor environment. The cable lead-in device is assembled by the construction unit when installing the cable.
(1) One type of cable entry device for underground weatherproof cover is type I, which is used for power supply line. It is suitable for power cable with outer diameter of 5~7mm. Other cable introduction device is type II, which is used for introducing video cable or lens control cable. For cables with an outer diameter of 7 to 10.5mm.
(2) Assembly shall comply with the requirements of the drawings.
(3) The assembly of the cable lead-in device shall be carried out before it is mounted on the weatherproof hood round drum. First according to the requirements of the attached drawings, the cable shall be stripped and the length required for the wiring inside the weatherproof earth shield shall be sufficient. Clean the inner and outer surfaces of the cable lead-in device. The stripped bare part is coated with the specified silicone rubber and allowed to cure.
(4) Install the metal gasket 4 in the cable entry device housing 6 and then select the rubber ring 3 of appropriate size to fit into the housing 6 (for example, Ф11mm/5x7mm rubber ring for power cable with outer diameter Ф 5mm, 75-5 standard Video cable with Ф 15 / Ф 7 × 7mm rubber ring).
(5) Put the cable on the compression screw 2 and insert it into the housing 6 where the rubber ring 3 is installed. Adjust the position of the cable and press the cable with the compression screw 2 .
(6) When filling the cable introduction device, it is necessary to place the housing 6 pressing screw upside down, open the injection hole screw 7 and the plug gasket 8, and fill the housing 6 with the specified silicone rubber. Filler, no air holes are allowed. After filling in the hole for the injection hole, screw the injection hole screw and continue filling from the plug gasket until it is suspended from the upper mouth by 1 to 2 mm.
(7) Hold the cable entry device in the upright position, open the plug gasket, and place it for more than 24 hours. Then, plug the plug hole and open it for 24 hours or more. Note hole plugging The specified silicone rubber is sealed. The plug gasket is filled with the specified silicone rubber and the plug gasket is sealed and cured.
(8) When the cable introduction device is installed in the housing of the shield, the designated silicone rubber is applied to the inner and outer screwing portions, and tightened with a hand.
4. The all-weather protective hood cover is sealed by the user. The defrosting glass is filled into the rubber ring at the factory and sealed with silicone rubber. When the user installs it on the protective cover cylinder, the defrosting glass is coated on the upper and lower sides of the rubber ring with specified Silicone rubber, press on the cap (do not press the tempered glass on the cap), tighten the fastening screw.
5. The buried all-weather protective shield is buried in the ground. First, use a thin wire to thread the cable into the metal casing, place the surface of the buried weatherproof protective cover flush with the ground, and pour the cement mortar to fix it.
Geo-environmental weather protection cover development trend is green
The buried all-weather protective cover is designed to monitor the hidden Tibetan objects underneath the car chassis. The underground weatherproof protective cover can be used in important units such as prisons, customs and warehouses. Buried under the ground, tempered glass, not afraid of car pressure. Absolutely sealed, water and warm air cannot enter. Peltier automatic air-conditioning: underground weatherproof cover uses a semiconductor cooling and heating solid element with a Peltier effect (the element is powered on one side and the other side is heated, and the inverter is powered on When it is hot and cold, it is also reversed phase) Heatsinks and fans are added inside to force heat dissipation. The underground weatherproof cover is automatically adjusted by the temperature measurement control circuit, so that the temperature inside the weatherproof cover is controlled within a certain range (adjustable). The temperature in the hood is controlled at +5°C and below, and +40°C above. The ground-covered all-weather protective cover experiment proved that the protective cover can work normally at -40°C to +65°C (direct sunlight). Its superior performance, more uniform than normal heating wire, safe and reliable, long life, cooling fan than the cooling does not undermine the protective cover, effectively prevent the entry of dust, moisture, corrosive gases. The overall protective cover is made of aluminum alloy, cylindrical structure. Automatic defrosting: The window glass adopts vacuum ion-coated conductive glass, temperature control, automatic conduction heating below +5°C to prevent window frost from affecting the line of sight.