"During the construction, we will isolate and prevent toxic and harmful gases. When the Hongdou Mountain Tunnel is opened to traffic, it will be a non-toxic tunnel." In the latest CCTV report on the "poisonous gas" tunnel in Hongdou Mountain, Zhao Yu, manager of the Daling Railway Project Department of China Railway 10th Bureau, gathered the employees who had not yet been evacuated from the project team and formed a new team. After in-depth investigation with experts in various fields, he finally broke through the eight kinds of poisonous gas predicament of the "poisonous gas" tunnel and solved the big problem that deterred many construction workers!

It is understood that this "poisonous gas" tunnel is located in Lincang, Yunnan, deep in the boundless mountains. It is the only major China-Myanmar international passage under construction in my country to Myanmar. The condition is extremely special, and it is enriched with 8 toxic and harmful gases such as hydrogen sulfide, carbon monoxide, and carbon dioxide. When it entered the site for one year of construction in 2017, the construction team did not judge the toxic gases in the tunnel, insufficient handling experience led to the outbreak of a gas burst accident. Subsequently, 2/3 employees applied to evacuate the site, the project was stalled. Faced with such "rare problems", Zhao Yu, manager of the Dalin Railway Project Department of the 10th Bureau of China Railway, cooperated with the new team and expert group to carry out new exploration, and finally solved the tunnel construction problems such as 8 kinds of poisonous gas, high temperature and sudden mud gushing water, so that the project can continue. At present, the construction of the Hongdoushan Tunnel has exceeded 3000 meters, and the construction of the Dadin Railway, a key project of the China-Myanmar International Corridor, is also progressing steadily.

What is the key to conquering the "poisonous gas" tunnel? In addition to the expert team's not giving up and daring to explore, the instruments carried by the tunnel construction exploration are also "indispensable. It is reported that in the exploration of the new "poisonous gas" tunnel, experts used PTM600 portable gas analyzer produced by Shenzhen Yiyuntian, 1 a gas analyzer that can quickly collect and display various data in space on a high-definition display screen through electrochemical or infrared, catalytic combustion, thermal conductivity, PID photoionization principle gas sensor, Swiss high-precision capacitive digital temperature and humidity sensor and Swiss high-precision capacitive digital temperature and humidity sensor. Although compact and convenient, but with a number of functions, not only can detect more than 500 kinds of gas species, but also can detect and analyze a variety of background gas for nitrogen or oxygen high concentration of single gas purity. This gas analyzer has advanced circuit design, mature core algorithm processing, and has obtained a number of software patents and appearance patents.

In addition to PTM6000 a portable gas analyzer, in order to cope with the more extreme environment and narrow space in the tunnel, the construction workers also adopted another 1 product of Yiyuntian -- MS400 portable four-in-one gas detector. This is a more portable instrument than PTM6000, mainly through electrochemical, infrared, catalytic combustion, thermal conductivity, PID light ion and other principles, and finally the detected gas composition is displayed on the screen.Although this detector is smaller than the portable one, it is still powerful and can detect 1-6 gases at the same time.

with the survey assistance of yiyuntian, the extremely dangerous area of toxic and harmful gases in hongdou mountain tunnel has finally been calculated by experts. the exploration results exceed the cognitive level of current geological survey technology and have accumulated very valuable experience and technology for tunnel construction in our country.

It is reported that Yiyuntian is a national high-tech enterprise focusing on products and solutions such as gas detection/alarm/monitoring pretreatment. With more than 13 years of technical precipitation and experience accumulation, Yiyuntian has been able to understand the differentiated needs of gas detection services in different application fields, and relying on its own strong research and development iteration capabilities, to provide partners with industry-leading applications in petroleum, Chemical industry, gas transmission and distribution, warehousing, municipal gas, fire protection, environmental protection, metallurgy, biochemical medicine, energy and power industries gas detection solutions, products are widely used, also through the ISO9001 quality management system certification, IS014001 environmental management system certification, CCEP China environmental protection product certification; And obtain the corresponding product explosion-proof certificate, CPA type approval certificate, CMC measurement license, appearance patent certificate, software copyright registration certificate, etc., won the unanimous approval of the majority of customers.The "toxic gas" tunnel exploration problem can be overcome, once again certified Yiyuntian in the field of gas detection professional! In the future, Yiyuntian will continue to create a safe, environmentally friendly and healthy working and living environment for customers with high-quality products and considerate services, and fulfill its corporate mission of "protecting the health of all people and the safety of the working environment".