The Wuhan high-power locomotive maintenance section of China Railway Wuhan Bureau Group Co., Ltd. is one of the seven harmonious high-power locomotive maintenance bases in The country, which is known as the "top three hospitals" for locomotives to see doctors. The incoming locomotive is dismantled, overhauled, flawed, assembled, commissioned, painted and other processes here, and restarted on the line.
The 29-year-old Huang Yi is the foreman of the second group of maintenance of the general workshop of the wuhan high-power locomotive maintenance section, known as the "brake element". In the seven years since his entry, he has aimed at various "difficult and complicated diseases" of the train braking system, solved the hard bone problems such as wiper maintenance and wind pressure pipe detection, and led the completion of more than 20 technical research projects, which has saved more than 2.3 million yuan in costs for enterprises.
Wiper, save more than 1.2 million yuan a year
In the wind and rain, the wiper in front of the locomotive swings back and forth. The two swing arms weigh up to 4 kg, and the two motors are driven by more than 30 large and small wind pressure pipes under the driver's cab control platform.
Huang Yi said: "In the past, the maintenance wiper system needed to be curled up in a space of less than 0.5 cubic meters under the driver's cab, but now it can be completely dismantled and put on the workbench for repair." ”
Huang Yi led the research team to conduct business discussions.
This change stems from Huang Yi's research 7 years ago. Since 2014, train wipers have been listed as overhaul projects within the section. During the maintenance, two employees outside the car need to climb up the ladder to check the shaft, and the other three need to drill into the space of less than 0.5 cubic meters to replace the wind pressure pipe, and the slightest carelessness will damage the wiper.
Staying in a small space is two or three hours, and in the summer, the temperature inside is more than 40 degrees Celsius. The causes of failures are varied, resulting in slow service.
Huang Yi installed the locomotive electrical switch.
At that time, Huang Yi, who was the deputy foreman of the team, was anxious in his eyes, and he looked up the information, figured out the structure of the wiper parts, and consulted the manufacturer, and finally figured out all the "Dao Dao" inside.
Back to the team, he gathered other employees to draw pictures on the spot to explain the working mechanism and maintenance process of the wiper. The improvement of the pneumatic wiper maintenance method has shortened the maintenance man-hours of a single locomotive wiper from 144 hours to 48 hours, which can save more than 1.2 million yuan in maintenance costs every year.
Up to now, Huang Yi has brought out an 11-person wiper maintenance team, which can skillfully handle various wiper failures.
Homebrew equipment "listens" to malfunctioning
Huang Yi noticed during the overhaul that the signal frequency output by the wind pressure pipeline in the sensor of each functional module is the same. He wondered: Can we collect all kinds of wind pressure data externally by testing wind pressure fluctuations, and detect the fault points of wind pipelines and functions by collecting dynamic wind pressure fluctuations?
He bought circuit boards, second-hand tablet computers, detection lines, etc. from the Internet, downloaded the data processing software, and made a wind pressure fluctuation detector. By inserting the detection line probe into the brake module detection interface, you can judge whether there is a hidden danger of failure in the pipeline and function module through the change data of the wind pressure fluctuation like a doctor's auscultation.
Huang Yi installed locomotive air lines.
Since the employees used the wind pressure fluctuation detector, the accuracy of troubleshooting has been improved, and the detection time of a single module has been compressed from the original 2 hours to 30 minutes. "It's a great feeling!" Employee Zhao Wei said.
It is reported that it now takes only 30 minutes at most to accurately troubleshoot the fault points of the wind pressure pipe and valves. At the same time, the recorded data can be used as a maintenance record voucher, convenient to carry around for after-sales service, etc.
Small reforms to achieve increased productivity
Not only that, Huang Yi also developed a Z-type special wrench for the brake cylinder pipeline connected to the bogie and the body, and the EBV module equipment for electronic brake valves, which greatly improved production efficiency. Employees therefore praised him as a "brake leader".
In August 2021, Huang Yi won the first place in the brake fitter skills competition in the sixth national railway industry vocational skills competition, and the Ministry of Human Resources and Social Security issued a commendation decision and awarded Huang Yi the title of "National Technical Expert".
These minor reforms
What do the employees use?
Brake group employee Ma Yu
Huang Yi combined with the actual scene to make a "Z" type special wrench, so that we can make the upper force in the narrow working space, and now it takes only half an hour to get it, which is really too practical.
Brake technician Zhang Shutao
The wind pressure fluctuation monitor has greatly improved the efficiency and accuracy of the brake system troubleshooting, and the work efficiency has been greatly improved.
Overhaul the second group of employees Cheng Kang
The various tools made by Huang Yi seem simple, but they are actually very creative, which greatly improves our work efficiency.
Small changes and small revolutions condensed
The wisdom and creativity of railway workers
Seemingly "small" initiatives
But it played a pivotal role
Give the railroad youth a thumbs up!
Contributed by: Hubei Reporter Station of People's Railway Newspaper Co., Ltd. (Wuhan Bureau Group Company Rong Media Center), Wuhan High-power Locomotive Maintenance Section Rong Media Studio
Text: Sun Zhongxiu Wang Jie Fang Xinming Liao Chao Peng Qi
Edit: Su Fan