Type of liquid nitrogen tank A. Liquid nitrogen storage The storage tank is mainly used for static storage of indoor liquid nitrogen, and preserves experimental specimens such as bovine semen and tissue sheets. It is not suitable for long-distance transportation under working conditions; the general models are: YDS-X series. II. Transport liquid nitrogen tank Transport tanks mainly have special shock-proof design. In addition to static storage, they can also be transported in liquid nitrogen state, but should avoid severe collision and vibration. In addition, use a small amount of liquid nitrogen in short time and short distance. When it is stored in a thermos bottle (cup) or the like, it is necessary to cut a small toothpick-like small groove at the edge of the stopper so that the nitrogen gas can be safely discharged. The general models are: YDS-XB series . III. Since pressurized liquid nitrogen tank Product composition : infusion valve, deflation and pressure reducing valve, pressure increasing valve, double safety valve, pressure gauge, liquid level gauge, infusion tube, moving caster, container body; working principle: the inside of the container is provided with self-pressurizing device, which is The pressure is generated by a small amount of liquid nitrogen in the container, so that the container can discharge liquid nitrogen and is connected to other instruments that need to be cooled. The general models are: YDZ-X series. IV. Infusion of aerated liquid nitrogen tank type The aerated infusion liquid nitrogen tank is actually similar to the self-pressurized liquid nitrogen tank: the self-pressurized liquid nitrogen tank is formed by gasification of the internal liquid nitrogen to increase the volume and generate pressure to discharge the liquid nitrogen. The self-discharging liquid nitrogen tank is pressurized with external nitrogen to discharge liquid nitrogen in the liquid nitrogen tank. (The booster source is an additional nitrogen bottle) V. Air Transport type liquid nitrogen tank With the continuous development of technology. The emergence of new materials. Also for the safety of air transport. This type of liquid nitrogen tank was designed and manufactured. The liquid nitrogen absorber is provided in the inner liner of the series for adsorbing and preserving liquid nitrogen. Even if the container is filled with liquid nitrogen and dumped during transportation, there will be no liquid nitrogen outflow, and the liquid nitrogen evaporation is small and safer to use. It is especially suitable for container air transportation environments. But the cost is higher. VI. Self-draining of liquid nitrogen tank The self-discharging liquid nitrogen tank is actually a pressurized liquid nitrogen tank, and a liquid nitrogen pump is installed on the tank mouth; a hand-clamped rubber ball is arranged on the liquid nitrogen pump. When using a rubber ball, a small amount of liquid nitrogen is sucked into the gasification chamber. Producing gasification increases the volume to generate pressure. The liquid nitrogen in the liquid nitrogen tank is discharged. This amount of infusion is small. It is only used by users who need a small amount of liquid nitrogen; if continuous infusion of nitrogen is required, it is necessary to continuously pinch the rubber ball; the work efficiency is low. General specifications are: YDS-15BT , YDS-20BT , YDS-30BT , YDS-35BT , YDS-50BT, etc. Seven .. Glass inner tank nitrogen tank Glass tank liquid nitrogen (Dewar) is a more ideal container and tool for storing liquid gases, cryogenic research and protection of crystal components. Due to its good thermal insulation performance, quality and quantity have been continuously improved for more than ten years, and it has been widely used in various fields such as scientific research, medical and health, cold heading, and oil drilling. Due to its simple structure, good thermal insulation, transparency and good sealing, the glass dewar has unique advantages over metal dewars. However, glass is a brittle material with poor strength and brittleness, so it is not suitable for the manufacture of Dewars with a diameter of more than 250 mm and a length of 700 mm . Eight . Stainless steel small liquid nitrogen transfer cup Brief description: This product is a double stainless steel, for transferring stored frozen in liquid nitrogen or a small sample of the sample. There are two main types; Product details: model Shape diameter Height of form Volume Caliber mm YD-500 500ml 80 YD-1000 1000ml 100 LED traffic lights are an indispensable tool in urban traffic and an important guarantee for urban traffic order. This example is to implement a common traffic signal light function at an intersection. Readers can realize a more complete LED Traffic Light by learning this traffic light controller. For example, real-time configuration of the time of various traffic lights, manual control of the status of each light, etc. Red Green Countdown Timer,Traffic Light Countdown,Traffic Signal Countdown Timer,Traffic Light Timers Shenzhen Wide Way Optoelectronics Co., Ltd. , https://www.wdmtrafficlight.com
Traffic at an intersection is generally divided into two directions, each direction has three types of red, green and yellow lights, and each direction also has a left turn light, so each direction has 4 lights.
This LED traffic light is also designed with a countdown traffic light display function for the status of each light. You can set an initial value for each light state, and after the light state changes, it starts to count down according to this initial value. After the countdown is reset to zero, the state of the light will change to the next state.
It is worth noting that the state of the traffic signal lights in the two directions is related. In other words, the state of the lights in each direction affects the state of the lights in the other direction, so that the traffic flow in the two directions can be coordinated. If the lights in each direction change independently, then the traffic lights have no meaning.