This shows that the vacuum oven has leaked.
Zui difficult to check is the inner tank leak, need to pour some water inside the box, then turn off the door to vacuum, and then turn the box if there is a bubble at a certain position is the leak point, if necessary, use argon arc welding Solder it. There are also some ways: put nitrogen in the vacuum furnace and put down the foam in the place where there is a possibility of leakage. If there is continuous expansion of the foam, it means there is a gap; another way is to prepare the barrel of washing powder and the syringe, and take the syringe to make it possible for you. Inject the washing powder water in the leaked place, and carefully observe if there is a bubble point at the injection to prove that this point is a leak point.
If the door seal is slightly tight, it is okay if the vacuum in the vacuum oven reaches a certain level. First take a vacuum and see if the negative pressure gauge can reach a standard atmospheric pressure. If the pointer changes slowly during the pumping process, try to push the door in to see if it can be vacuumed. If you can vacuum, just Just screw the door a few turns and it will be fine. If you push the door with your hand, it won't work. . . It is very likely that the screws that fix the heating block on the inner liner are loose, and the rear baffle needs to be removed. (Please bring gloves and a mask during the disassembly process. The general insulation surface is made of silicate. This thing will be very close to the skin. Uncomfortable) Then find the heating element and then tighten the fixing screws that fix the heating block.
The small Traffic Light is a small traffic light suitable for children's teaching, playground and decoration. It adopts low voltage, green energy, economical and environmentally friendly, does not contain harmful substances, and does not emit pollutants. A safe and environmentally friendly traffic light.
Traffic signals can enable vehicles to run in an orderly manner, reduce traffic congestion, and reduce traffic accidents, so that all traffic participants can drive in an orderly manner, avoiding the time waste caused by traffic congestion and the loss of life and property caused by traffic accidents.
The composition of traffic lights: traffic lights are composed of red, green, and yellow lights.
Types of traffic lights: Traffic lights are divided into motor vehicle lights, non-motor vehicle lights, pedestrian crossing lights, lane lights, direction indicator lights, flashing warning lights, road and railway intersection lights.
Traffic accidents that do not follow the directions of traffic lights and run red lights are repeated. The root cause of these problems may be related to childhood education and traffic safety awareness. Because the road traffic signal signs in counties and towns have not been widely used, or because there are few road vehicles in towns, people running red lights and becoming a habit, then how to avoid these problems, we need to grasp the root of the problem. Improve people's awareness of traffic safety and strengthen the learning of traffic safety knowledge.
Mini Traffic Light,Led Traffic Signals,Led Traffic Light Lens,Mini Stop Light
Shenzhen Wide Way Optoelectronics Co., Ltd. , https://www.wdmtrafficlight.com