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"Grassroots inventor" set off a "breathing valve revolution"
As the base of Huadong Petrochemical Company, “the number of dangerous vehicles that went out of Ningbo every year exceeded 230,000.†Yesterday, Lu Bingquan, the Bureau of Harmonization Supervision of the Municipal Safety Supervision Bureau, told the reporter. According to statistics, there are currently more than 2,300 dangerous vehicles in Ningbo, including more than 1,300 tankers.
"We have a saying in the line: not afraid of overturning, it is afraid of leakage." Lin Zhonggui, general manager of Ningbo Hengfeng Transportation Co., Ltd., who is engaged in the transportation of dangerous chemicals, said.
Chen Yuerong, who has been engaged in the tank truck repair industry for 20 years, said: "Every hundred tank trucks have about two to three rollover accidents in a year." The boss or driver who came to repair the car, and Chen Yuerong said that they are almost "most worried." The car turned over and the material in the jar leaked out."
In 2006, Chen Yuerong's first generation of anti-leakage safety system was finally developed. Hengfeng's more than 100 tank trucks were first modified into this system. “The results have successfully avoided two leaks,†Lin Zhonggui said.
Beginning in 2008, the Jiangbei District Government and Zhuangqiao Street supported special funds to complete the technical transformation of about 500 tank cars in the district. Zhenhai District promoted the progress of the upgrading and upgrading of the system last year, and the district government gave a certain subsidy for the transformation of vehicles.
Chen Yuerong said that a tank truck was modified to the system he invented, and the total cost was about 4,600 yuan. At present, about 1000 tank trucks in the city have been modified with the “new leak-proof safety systemâ€. In the 15 side-turning accidents of the modified tank trucks, only one of the tanks exceeded the pressure of the sinking, and the breathing valve automatically opened the pressure relief. A small amount of liquid leakage has occurred.
The next goal is to promote the revision of existing national standards
According to the current national standards, for tank vehicles that transport liquid dangerous goods, the outlet valve of the breathing valve should be opened when the pressure inside the tank is higher than the external pressure of 6 to 8 kPa. "This standard has been outdated and should be revised." Chen Yuerong came up with his revised proposal to tell reporters.
Chen Yuerong said that the breathing valve manufactured according to the current standard, "do not say that the liquid will leak when rolling over, that is, when the car is climbing, if the slope exceeds 5 degrees, the pressure of the liquid in the tank will exceed 8 kPa, resulting in The breathing valve opens the liquid overflow." Therefore, the tanker of the new type of breathing valve that he invented was not modified. The driver spilled the liquid in the transport to prevent the liquid from overflowing during transportation.
Chen Yuerong developed a "new leak-proof safety system" to improve vehicle safety by installing a one-way safety valve under the original breathing valve. When the tanker is tipped over, the steel ball of the safety valve will come into contact with the cone surface of the valve core from the bottom of the valve cover to seal the vent of the breathing valve, thereby preventing material from flowing out. When the pressure inside the tank is too large, the valve flap of the breathing valve is lifted up, and the safety valve will automatically open the pressure relief to avoid an explosion accident caused by excessive pressure.
"My breathing valve, the opening pressure is 20 kPa. The pressure of the general car when the rollover is 10 kPa, if the tank is turned 180 degrees, the pressure is 20 kPa, at this time, the breathing valve There is also a supercharger that will increase the opening pressure to 25 kPa, and the breathing valve will only open the pressure when the pressure exceeds 25 kPa," he said.
Grassroots inventor's "new leak-proof safety system"
The leakage of a phenol tanker truck affected millions of people's domestic water. The accident occurred in Jiande, Hangzhou on the evening of the 4th of this month. These days, it became the most concerned thing for Jiang Yuerong Safety Valve Technology Co., Ltd. Chen Yuerong. "If you modify the new breathing valve system we developed, we should be able to avoid this accident." Yesterday, Chen Yuerong told reporters with confidence.