After entering the winter, it is easy to experience various safety accidents. In order to effectively strengthen the fire safety management at the construction site during the winter and spring, and to prevent fire accidents, Chongqing Hechuan Fire will remind you to pay attention to the following points: First, the construction site should strictly implement the fire safety responsibility system, construction, construction, supervision of all parties should sign the fire safety responsibility, clear fire safety management organizations and personnel, and strictly establish and implement fire safety management system. Second, the construction site living area, office area, temporary housing, construction in progress should meet the requirements of fire separation, and set up evacuation channels. The entrance and exit of the construction site shall meet the requirements for the passage of fire trucks. Temporary fire lanes shall be set up at the construction site to keep them open. It is forbidden to live in illegal construction within the construction and renovation site. 3. The burning performance of temporary houses on the construction site shall be class A. When the temporary house uses metal sandwich plates, the combustion performance grade of the core materials shall be class A. The level of combustion performance of external wall insulation materials and decoration materials for construction in progress and decoration sites shall meet the requirements of technical standards. IV. The flammable and explosive dangerous goods at the construction site shall be classified and stored in special libraries. No open fire signs shall be set. When using paints, organic solvents, etc., which are easily volatile and produce flammable gases, be sure to keep proper ventilation. Do not use naked flames in the workplace and take anti-static measures. V. Temporary power supply facilities on the construction site shall strictly implement the requirements for temporary power consumption such as “three levels of power distribution at two levels of protection†and “one machine and one leakage and one leakageâ€; a special system for power consumption management shall be established at the construction site, and professional electricians shall hold certificates. Get on the job. Sixth, the construction site must have a hot work permit before the hot work welding operation. The hot work welding operation personnel should hold the certificate; the hot work should be equipped with fire fighting equipment, and set up a dedicated person to implement on-site monitoring, each hot work point is A guardian should be set up. 7. Fire fighting facilities shall not be arbitrarily disabled at the construction site. Temporary fire-fighting water supply systems, emergency lighting, evacuation indication signs, fire extinguishers and other temporary firefighting facilities shall be set up in accordance with the provisions of the construction site under construction. Temporary firefighting facilities shall be set up to meet technical standards and remain intact. effective. 8. The construction unit shall formulate a fire emergency evacuation plan and conduct drills on a regular basis. The fire safety education and training shall be carried out in various forms through bulletin boards, on-site training, and pre-job training. Relevant personnel should understand the danger of fire on the construction site, report fire alarms, fight fires from the beginning, organize escapes and save themselves. The information in this article comes from the Internet and was reorganized and edited by China Rescue Equipment Network.
The full ceramic ball bearings listed below are supplied with rings and balls made from zirconium dioxide (ZrO2). These zirconia bearings are available as full complement (no cage) or with cages made from PTFE, PEEK or 316 stainless steel.
These are non magnetic, non-conductive and highly corrosion resistant to most chemicals although ZrO2 bearings are not recommended for prolonged contact with steam. Full complement bearings or those with a 316 stainless cage can be used up to 400°C while bearings with a PEEK or PTFE cage can cope with temperatures of up to 250°C. For temperatures below -70°C, PTFE or 316 stainless steel cages are preferred. Standard radial clearance for full ceramic bearings is C0 but other clearances can be supplied to order.
ZrO2 ceramic bearings are generally used for their extreme temperature capabilities, excellent corrosion resistance or non-magnetic properties. Other sizes can be supplied on request.
The Description of Ceramic Bearings: Cermic Ball Bearing,Full Ceramic Bearing,Hybrid Ceramic Bearing,Self-Aligning Full Ceramic Ball Bearing Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearing.com
Compared to steel, Ceramic ball Bearings have many specific advantages. They offer superior corrosion and heat resistance, higher dimensional stability, and lower density, which facilitate high speed. Ceramics are superior to steel in heat and corrosion resistance, and are lightweight and extremely hard as well. Consequently, ceramic rolling bearings can be used in environments where conventional steel bearings cannot. That is to say, the superiority of these bearings makes it possible that they can be applied in some special environments.
Firstly, they can be used in corrosive environments. Compared to stainless steel bearings, hybrid and all Ceramic Bearing lasted three and twenty times longer respectively. It is presumed that water readily adheres to silicon nitride and forms a better lubrication film, leading to extended bearing life.
Secondly, they can be performed in corrosive agents. Generally, silicon nitride has excellent corrosion resistance. However, corrosion resistance varies depending on the type and quantity of sintering additives, and certain corrosive agents decrease in hardness and flexural strength. In such situation, it is can be proved that the carbide-based ceramic bearings are the most effective.
Thirdly, they can be used in high-temperature vacuum. An all-silicon nitride Ball Bearing with a self-lubricating laminated cage (mainly composed of MoS2) and with MoS2-coated rings and balls proved superior in durability in a high-temperature vacuum environment. Compared with the hybrid bearings, the all-ceramic bearing was superior in both dynamic frictional torque and life.
Fourthly, they can be performed with poor lubrication. As ceramics are extremely hard and have outstanding wear resistance, they outperform other materials in bearing life without lubrication. According to a test, the steel bearing seized within a short period while the hybrid and all 627 Ceramic Bearings, though sustaining wear, did not. And the all-ceramic bearing sustained considerably less wear than the hybrid bearing, indicating that its endurance life is much longer.
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