1.The construction of vertical electric welding and heat insulation dewar bottle.
The inner liner and shell of the vertical electric welding insulated Dewar bottle are made of stainless steel material, and the inner liner support system is made of stainless steel material to enhance the compressive strength and reasonably reduce the heat loss rate. There is an adiabatic layer between the inner liner and the casing, and the double-layer thermal insulation material and high vacuum value ensure the storage time of liquid state.
The inner side of the housing is equipped with a built-in vaporizer, which can convert low temperature liquid into vapor. The built-in booster can increase the working pressure to the predetermined working pressure, which can be maintained for a long time during the whole process of application to achieve the purpose of fast and stable application. Each insulated Dewar bottle has a stainless steel material ring structure (protective cover) on the top to protect the pipeline. The protective cover is attached to the cylinder with four support brackets, each with a slotted groove for easy handling of the Dewar bottle by cars and lifting equipment.
All operating components are placed on top of the Dewar bottle for easy handling. In the independent application environment, users can reasonably regulate the whole process of application through automatic venting valve, booster valve, air pressure gauge and quick liquid phase valve.
In order to ensure that the inner liner of Dewar bottle is lower than the working pressure according to the hermeneutic, the valve and explosion-proof type piece are installed on the Dewar bottle.

2. The application and characteristics of column type electric welding heat insulation Dewar bottle.
Used for conveying and storing liquid oxygen, liquid nitrogen, liquid argon, liquid CO2, lng natural gas and other hydrogen production liquids, Dewar bottles can be used to supply liquid or vapor.
The bottles are easy to use, can be trusted, economical and durable. Specific features are as follows:

1. The inner support system are made of stainless steel, which can achieve the purpose of low heat loss rate and high compressive strength.
2. Easy to use, single individual operation.
3. Storage of pure low temperature liquid state.
4. Large gas storage capacity. the storage capacity of DP175 Dewar bottle is more than 18 times of the storage capacity of standard high-pressure gas cylinder.
5. The internal working pressure will rise when the Dewar bottle is stopped after filling, the Dewar bottle has a high performance insulation system, and its working pressure rises at a low rate, usually without the application of valves to reduce the working pressure.
6. Built-in booster and vaporizer can continuously supply gas or liquid, no external vaporizer is needed when designing the dosage.