Because vaccines, drugs, etc., are related to the safety of vaccination, how do vaccines are sent to vaccination agencies from the time the vaccines are released to storage? The entire transportation process in the middle has attracted the attention of the society, parents, and school. As long as there is a slight mistake in one of the links, the quality of vaccines and medicines may be questioned, and the health of children cannot be guaranteed.
The control of the temperature during the transport of the vaccine is very important. Before the vaccine is put into the refrigerated truck , it is necessary to put the temperature monitor in the car. This can guarantee that once the temperature inside the cabin becomes abnormal, it can be quickly monitored. . In addition, before the vaccine is installed on the vehicle, it must be ensured that the temperature inside the cabin is controlled between 2Â°C and 8Â°C.
In the process of storage and transportation, temperature is the lifeline of quality assurance, and it is not advisable to leave the cold chain of the vaccine too long. The transportation must be fast and the handling time should be shortened as much as possible.
In the cold storage of the vaccine, there is a chilly atmosphere. Four rows of tall shelves contain various types of vaccines for immunization programs. There are four refrigerating evaporators in the four corners of the ceiling of the refrigerator to keep the temperature of the refrigerator balanced. The inside of the warehouse is a two-way power supply and also has a generator. "Even if there is a power outage, the temperature of the refrigerator can be guaranteed.
Different from ordinary trucks, the cooling equipment for professional vaccine refrigerators is separated from the air-conditioning in the cab. The refrigerated air circulates independently inside the container. There is an air diversion tank at the bottom of the container to ensure that the vaccine is not kept close to the bottom of the container. The temperature is increased to ensure that the temperature in each position of the container can be stabilized at 2-8Â°C.
The transportation of vaccines has a direct bearing on peopleâ€™s health. Therefore, it must strictly comply with relevant laws and regulations, strengthen vaccine supervision, standardize inoculation activities, improve and standardize the construction of preventive vaccination service networks, firmly guarantee the quality and safety of vaccination services, and consolidate and improve national immunity. Plan the vaccination rate and raise the level of vaccination. Build a more rational vaccine safety network and really build an "immune barrier" for vaccination.
The Thrust Roller Bearing is used to bear axial and radial joint loads as the main axial load, but the radial load should not exceed 55% of the axial load. Compared with other thrust roller bearings, this kind of bearing has a lower friction factor, higher speed and a heart regulating performance.
The rod of the 29000 type bearing is an asymmetrical spherical roller, which can reduce the relative slipping of roller and raceway in operation, and has many advantages such as long roller diameter, large diameter, large number of rollers and high load capacity. Usually, oil lubrication is used, and grease can be lubricated at some low speed. In the design and selection, it should be selected first.
The 80000 type thrust Cylindrical Roller Bearing, the 90000 type thrust cone Roller Bearing and the AXK type thrust roller Needle Bearing can withstand the uniaxial axial load, which is much larger than the thrust ball bearing's axial load capacity, and has large rigidity and occupies small axial space.
Thrust cylindrical roller bearing and thrust cone roller bearing are suitable for low rotational speed, and thrust cone roller bearing speed is slightly higher than that of thrust cylindrical roller bearing. The thrust cylindrical roller bearing is a separable bearing. It can only withstand one-way axial load and slight impact, and can restrict the axial displacement of the shaft (or shell) in one direction, so it can be used for unidirectional axial positioning. But its bearing capacity is far greater than that of the thrust ball bearing. When roller is rolling, the roller will inevitably slide on the raceway because of the different speed of the two ends of the roller. Therefore, the limit speed of this kind of bearing is lower than that of the thrust ball bearing, which is usually suitable for low speed operation.
The standard design of thrust cylindrical roller bearing adopts a metal solid cage. According to the requirements of the user, other types or materials can be used. The thrust Tapered Roller Bearing can only bear one direction axial load, which can limit the unidirectional axial displacement of the bearing, so it can be used as a one-way axial orientation. Compared with the thrust cylindrical roller bearing, the bearing capacity is large and the relative sliding is small, but the limit speed is low.
Thrust Roller Bearing
Thrust Roller Bearing,Small Thrust Bearing,Mini Thrust Ball Bearing,Thrust Needle Roller Bearing
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