(1) the problems arising from the use of the Gas Co in Kunlun in the use of the voltage regulator cabinet
In the process of more than 2 years of use, a series of problems have appeared in the voltage regulator cabinet. In winter, the flange interface in the pressure box is leaked in varying degrees because of the low temperature.
In summer, when the pressure of the pipe network in front of the surge tank rises to 0.4MPa, the joint of the inlet and outlet pipe of the voltage regulator cabinet is leaking.
In the winter of 2001, the signal tube, the main regulator valve and shut-off valve valve ice blocked, pressure failure, caused by low pressure pipeline gas stop since 3;
Chaoyang apartments, FAW and other residential pressure regulating cabinet main pressure regulator valve seat, valve is cut off ice, ice spring limit, out of action, safety relief valve freezing failure, can not start bleeding, caused by the import and export pipeline through the low pressure pipeline pressure more than 0.2MPa, resulting in 3 civilian burst table 2, the stove on fire, 3 people suffered minor injuries;
Just in the winter, the pressure regulating cabinet inlet and outlet of frost, often in the sun 1H, causing the user to breathe, the normal life of the user inconvenience.
For those problems, we organized the rush repair in time, and actively organized the engineering technicians to disassemble and analyze the research. We believe that the northern winter weather is relatively cold, with a minimum of -38, and the average temperature is about -20. The temperature of the export gas will also decline. Because of the change of ambient temperature and natural gas pressure, water vapor contained in natural gas is easy to hang up frost and ice, form frost blockage and ice blockage, and make the regulator fail.
How to solve the problem of gas surge tank in cold area
Double circuit voltage regulator
(2) improvement method
The interface of the pressure regulator and the pipe network is sealed by a threaded connection seal, and is changed into a high pressure oil resistant cotton pad seal with a flange interface.
The PE condensate cylinder is installed at the entrance of the surge tank perpendicular to the elbow of the pressure regulator.
The inlet and outlet of the pressure regulator is insulated by polyurethane foam from -1.6m to the inner pipe of the pressure regulator.
A ripple compensator is added between the filter and the pressure regulator in the pressure regulator cabinet.
The double circuit explosion-proof and tropical heat treatment is applied to the regulator, filter, valve, diffuser and pipeline, plus temperature control switch, and polyethylene insulation pipe is used for external thermal insulation.
The cabinet of the pressure regulator is made from a single layer structure to a thermal insulation cabinet with insulating layer.
Only from the original simple one-time ventilation hole into a ventilation device, type of porous switchable ridges in winter to ensure the temperature in the cabinet, closed and opened when necessary;
The summer is completely open to ensure ventilation.
According to the above method, the regulator manufacturers made corresponding improvement to our company from Hengshui Runfeng into 38 sets of pressure regulating cabinet, after two years of operation, improve the operation effect of the pressure regulating cabinet is good, did not occur with the gas stop, overpressure, low pressure phenomenon, residents, catering, factory gas reflect good.
Tan Gong is an interesting and useful account for providing professional knowledge of gas pressure regulating equipment.
Lifeng official website: www.hsrf0318com
Contact: Tan Gong 180-0338-3735 can add WeChat to QQ:289424295 at any time