Confusion of "cracks": CNR said that the CRH380BL train had not yet replaced the axle
Axle supplier Chi Chi said that different detection instruments cause “misjudgmentâ€
The Morning Post reporter Wang Daojun Feng Jun China North Locomotive Co., Ltd. has recalled 54 CRH380BL EMUs that have been put into operation by its subsidiaries since August 2006. The IC data came at a time when the State Council was conducting a major safety inspection on high-speed rails. Some media reported that CRH380BL-type high-speed rail axles were detected to exceed standard cracks. Axle supplier Zhiqi Railway Equipment Co., Ltd. (hereinafter abbreviated as Zhiqi) claims to be a “misjudgment†caused by different detection instruments, while the EMU manufacturer China North Locomotive & Rolling Stock Industry Corporation (hereinafter referred to as CNR Group) is No problem with the axle.
CRH380BL is an electric car produced by Changchun Railway Vehicle Co., Ltd. (hereinafter referred to as Changke Stock Co., Ltd.), a subsidiary of China North Car Co., Ltd., a subsidiary of CNR. “The report is not true. The two devices are different. The defect is allowed. There are always flaws in the flaw detection, such as uneven surface,†Niu Detian, Chief Engineer of the high-speed EMU of Changke Co., Ltd., told the Morning Post reporter yesterday. But these are regulated, international standards can not exceed 3 mm, domestic standards can not exceed 2 mm, the domestic than the international standard is even more stringent.†He believes that the media reported a crack of 7.1 mm is a nonsense, er, said.
In addition, CNR technical expert and general designer of the CRH380 project team, Li Ruizhen, said in an interview with the Morning Post reporter yesterday that after inspection, there was no problem with the CNR axle. However, Li Ruixin said that his views do not represent China CNR. For this reason, the Morning Post reporter called the CNR Xie Jilong phone many times and has not been answered.
Two flaw detector "truss "
According to Cai Xinxin's "The New Century [0.00 0.00% shares bar report]" weekly magazine "Hidden Crack" reported that on July 15, 2011, Jinan vehicle depot workers in the detection of workers through the flaw detector for the number of When the 6209L train was routinely inspected, it was found that on the CRH380BL train produced by CNR, ultrasonic waves were detected on the screen of the 11th car's axle. The amplitude of reflected waves on the screen was abnormal, which meant that there were internal defects.
A report of the “CRH Series EMUs Hollow Axle Ultrasonic Inspection Discovery Defects Record†obtained by the reporter of the Post reads: The detected shaft axis number is “moving axis E0901467-0050â€; the defect part and property is “CRH380B-6209L-11â€. -3 axis is close to the internal defect of the gear press part (between the gear and the wheel core); the remark is "defect is 1629.7mm from the A end of the axle, 64.3mm from the B end, the defect length is 7.1mm, height is 2.4mm, and the distance from the shaft inner wall is 75.9 Mmâ€; the processing method is “changing the axisâ€; the flaw detection unit is the Jinan depot’s motor vehicle section.
The above "New Century" magazine reported that its reporters saw the inspection report issued by the Jinan EMU in July and at least two reports dealt with changing the axis.
The report also stated that the hollow shaft has been found to have more than one unexplained defect in the key component concerning the safe operation of the vehicle. As early as June of this year, there was a similar report.
The axle is the key component that connects the wheels of the column and has a great deal of importance for train safety. According to several experts, China's domestic defect standard is less than 2mm. If it exceeds this standard, new axles must be replaced.
The CRH380BL high-speed rail is produced by Changke Co., Ltd. The cracked axle is supplied by Zhiqi Railway Equipment Co., Ltd.
Caixin.com reported that Beijing New Union Railway Technology Development Co., Ltd. (hereinafter referred to as the new railway) is providing the flaw detector. After the detection results came out, Zhiqi questioned the detection result was inaccurate, saying that the detectors provided by the new railway were produced in Germany, and Zhiqi’s products were derived from the technology of Italian Luigi Company.
According to the report, Zhiqi Company believes that the crack is a "misjudgment" caused by Germany's detection of allergy. Its general manager, Yang Huaiwen, even took his own Italian-made flaw detector to review the detected axles and wanted to compare it with the results of the new railroad's flaw detection.
However, the important flaw detection tests that were scheduled to be carried out on the 17th at the Jinan Motorcar failed to meet the deadline, because Zhichi’s flaw detector was bad when it arrived in Jinan and was not repaired the next day.
According to Li Lianxiu, an expert on flaw detection at the China Academy of Railway Sciences, without comparing the equipment of Zhiqi, it can be seen at a glance that the sensitivity of the Jinan EMU is increased when the equipment of the new railway is used. He thinks the conclusion is very clear. Jinan Train Center was just established for two months. The flaw detection is a very technical problem and it needs to learn slowly. As long as the benchmark is adjusted, one will not be a problem, and scrapped ones can be reused.
However, a technical expert of the new railroad questioned whether Zhiqi had made a factory inspection. He told the Caixin reporter on the phone that the Ministry of Railways' document clearly stipulates that internal defects should be detected before leaving the factory, and that the two-day Zhiqi company's flaw detectors cannot be used. They will report separately to the Ministry of Railways, and report the details to reflect their views on recommendations, but not to the media.
Yesterday, the Morning Post reporter interviewed Zhiqi Company. The other party said that there was no problem with the axle, and the production process of the axle was very formal. So far no unqualified products have been produced.
The above-mentioned technical experts of the new railroad told the Morning Post reporter that “the facts are objectiveâ€, but they have not seen the report of Caixinnet’s “detection of cracks†on any occasion.
CNR: Detection equipment is too sensitive
Facing the axle crack problem, CNR officially responded to an interview with a Beijing Daily reporter on the evening of August 21st. On June 30th, the CRH380BL train was on-line and operated until August 16th. The cumulative operation of 6.8 million kilometers has not been replaced. After one axle, the real reason for the recall of the EMU was as disclosed in the announcement, in order to reduce the failure rate and increase the train punctuality level.
The CNR Group also explained that the crack report was a "dummy probe" caused by too sensitive detection equipment. In July, the Ministry of Railways specially held a meeting to study this issue. Finally, the parameters were adjusted to harmonize the damage criteria of the flaw detection system, and the flaw detection operations were retrained to confirm that there was no problem with the cracked axles reported earlier.
According to an announcement made by CNR (601299.SH) on August 16, the company recalled on August 16 the 54 CRH380BL EMUs that had been put into operation and operated by its subsidiaries. The relevant OEMs and supporting companies were organized to conduct a thorough inspection of the recalled EMUs, systematically sort out problems, thoroughly investigate quality and safety hazards, and ensure that the technical quality of products meets the requirements of safe, reliable and orderly railway transportation.
This has become the first recall in the history of China's high-speed rail. During the operation of the CRH380BL model, malfunctions such as false alarm of hot-axis alarm, automatic drop of bow, loss of traction, etc. occurred continuously.
Earlier, Xie Jilong, Director of CNR Xie Jiong, said in an interview with the Post reporter on the issue of recalls: “The original idea was to troubleshoot those trains on the production line. After the State Council executive meeting, we felt that it was necessary to carry out the trains used on the Internet. Census rectification.†Xie Jilong said that this is CNR's initiative to apply for a recall.
CNR explained that there are three measures for recalling repairs at this time. The first is to replace all the components that are lacking in quality for sub-suppliers. The second is to replace the insulation layer of the sensor. Part of the sensor is not insulated enough, causing the sensor shielding that acts as an anti-interference to be burned off, thus sending out false signals. The third is to adjust the software of the train network control system. This is also the most difficult technical problem in the current recall.
China North Railway's share price closed at 4.58 yuan yesterday, down 1.72%.
The only supplier: Zhiqi Company
According to "New Century" magazine, at present, the supply of high-speed EMU axles in China is highly monopolized. The only supplier is Zhiqi Railway Equipment Co., Ltd. "Chi Chi has introduced a full set of Italian road Qi Ni company's technology, product quality is still relatively strong." North car revealed.
Zhiqi Railway Equipment Co., Ltd. website shows that the company is a Sino-foreign joint venture company under the Shanxi Coal Import and Export Group Co., Ltd. It was registered in October 2007 with a registered capital of 150 million yuan, of which China accounted for 75% and the foreign party accounted for 25%. It is currently the only high-speed EMU wheelset production and maintenance base in China.
The "New Century" magazine reported that one of the company's actual controllers was the Shanxi businesswoman Ding Shumiao. Due to suspected high-speed rail tenders, Ding Shumiao has been investigated by relevant authorities.
The Zhiqi company website shows that Zhiqi Railway Equipment Co., Ltd. introduced the advanced technology of the Italian Road Chini Railway Products Group. The company's products include EMU wheel pairs, regular passenger wheel pairs and MTR wheel pairs. Among them, the EMU wheelset products cover all the four CRH1, CRH2, CRH3 and CRH5 vehicle lines of the China High Speed ​​Rail Harmony EMU and all speed platforms ranging from 200 km/h to 500 km/h. Products have been used in Beijing-Tianjin Intercity, Wuhan-Guangzhou high-speed rail, Zheng West passenger specialties, Shanghai-Nanjing intercity, Beijing-Shanghai high-speed rail and other high-speed rail lines.
Axle supplier Chi Chi said that different detection instruments cause “misjudgmentâ€
The Morning Post reporter Wang Daojun Feng Jun China North Locomotive Co., Ltd. has recalled 54 CRH380BL EMUs that have been put into operation by its subsidiaries since August 2006. The IC data came at a time when the State Council was conducting a major safety inspection on high-speed rails. Some media reported that CRH380BL-type high-speed rail axles were detected to exceed standard cracks. Axle supplier Zhiqi Railway Equipment Co., Ltd. (hereinafter abbreviated as Zhiqi) claims to be a “misjudgment†caused by different detection instruments, while the EMU manufacturer China North Locomotive & Rolling Stock Industry Corporation (hereinafter referred to as CNR Group) is No problem with the axle.
CRH380BL is an electric car produced by Changchun Railway Vehicle Co., Ltd. (hereinafter referred to as Changke Stock Co., Ltd.), a subsidiary of China North Car Co., Ltd., a subsidiary of CNR. “The report is not true. The two devices are different. The defect is allowed. There are always flaws in the flaw detection, such as uneven surface,†Niu Detian, Chief Engineer of the high-speed EMU of Changke Co., Ltd., told the Morning Post reporter yesterday. But these are regulated, international standards can not exceed 3 mm, domestic standards can not exceed 2 mm, the domestic than the international standard is even more stringent.†He believes that the media reported a crack of 7.1 mm is a nonsense, er, said.
In addition, CNR technical expert and general designer of the CRH380 project team, Li Ruizhen, said in an interview with the Morning Post reporter yesterday that after inspection, there was no problem with the CNR axle. However, Li Ruixin said that his views do not represent China CNR. For this reason, the Morning Post reporter called the CNR Xie Jilong phone many times and has not been answered.
Two flaw detector "truss "
According to Cai Xinxin's "The New Century [0.00 0.00% shares bar report]" weekly magazine "Hidden Crack" reported that on July 15, 2011, Jinan vehicle depot workers in the detection of workers through the flaw detector for the number of When the 6209L train was routinely inspected, it was found that on the CRH380BL train produced by CNR, ultrasonic waves were detected on the screen of the 11th car's axle. The amplitude of reflected waves on the screen was abnormal, which meant that there were internal defects.
A report of the “CRH Series EMUs Hollow Axle Ultrasonic Inspection Discovery Defects Record†obtained by the reporter of the Post reads: The detected shaft axis number is “moving axis E0901467-0050â€; the defect part and property is “CRH380B-6209L-11â€. -3 axis is close to the internal defect of the gear press part (between the gear and the wheel core); the remark is "defect is 1629.7mm from the A end of the axle, 64.3mm from the B end, the defect length is 7.1mm, height is 2.4mm, and the distance from the shaft inner wall is 75.9 Mmâ€; the processing method is “changing the axisâ€; the flaw detection unit is the Jinan depot’s motor vehicle section.
The above "New Century" magazine reported that its reporters saw the inspection report issued by the Jinan EMU in July and at least two reports dealt with changing the axis.
The report also stated that the hollow shaft has been found to have more than one unexplained defect in the key component concerning the safe operation of the vehicle. As early as June of this year, there was a similar report.
The axle is the key component that connects the wheels of the column and has a great deal of importance for train safety. According to several experts, China's domestic defect standard is less than 2mm. If it exceeds this standard, new axles must be replaced.
The CRH380BL high-speed rail is produced by Changke Co., Ltd. The cracked axle is supplied by Zhiqi Railway Equipment Co., Ltd.
Caixin.com reported that Beijing New Union Railway Technology Development Co., Ltd. (hereinafter referred to as the new railway) is providing the flaw detector. After the detection results came out, Zhiqi questioned the detection result was inaccurate, saying that the detectors provided by the new railway were produced in Germany, and Zhiqi’s products were derived from the technology of Italian Luigi Company.
According to the report, Zhiqi Company believes that the crack is a "misjudgment" caused by Germany's detection of allergy. Its general manager, Yang Huaiwen, even took his own Italian-made flaw detector to review the detected axles and wanted to compare it with the results of the new railroad's flaw detection.
However, the important flaw detection tests that were scheduled to be carried out on the 17th at the Jinan Motorcar failed to meet the deadline, because Zhichi’s flaw detector was bad when it arrived in Jinan and was not repaired the next day.
According to Li Lianxiu, an expert on flaw detection at the China Academy of Railway Sciences, without comparing the equipment of Zhiqi, it can be seen at a glance that the sensitivity of the Jinan EMU is increased when the equipment of the new railway is used. He thinks the conclusion is very clear. Jinan Train Center was just established for two months. The flaw detection is a very technical problem and it needs to learn slowly. As long as the benchmark is adjusted, one will not be a problem, and scrapped ones can be reused.
However, a technical expert of the new railroad questioned whether Zhiqi had made a factory inspection. He told the Caixin reporter on the phone that the Ministry of Railways' document clearly stipulates that internal defects should be detected before leaving the factory, and that the two-day Zhiqi company's flaw detectors cannot be used. They will report separately to the Ministry of Railways, and report the details to reflect their views on recommendations, but not to the media.
Yesterday, the Morning Post reporter interviewed Zhiqi Company. The other party said that there was no problem with the axle, and the production process of the axle was very formal. So far no unqualified products have been produced.
The above-mentioned technical experts of the new railroad told the Morning Post reporter that “the facts are objectiveâ€, but they have not seen the report of Caixinnet’s “detection of cracks†on any occasion.
CNR: Detection equipment is too sensitive
Facing the axle crack problem, CNR officially responded to an interview with a Beijing Daily reporter on the evening of August 21st. On June 30th, the CRH380BL train was on-line and operated until August 16th. The cumulative operation of 6.8 million kilometers has not been replaced. After one axle, the real reason for the recall of the EMU was as disclosed in the announcement, in order to reduce the failure rate and increase the train punctuality level.
The CNR Group also explained that the crack report was a "dummy probe" caused by too sensitive detection equipment. In July, the Ministry of Railways specially held a meeting to study this issue. Finally, the parameters were adjusted to harmonize the damage criteria of the flaw detection system, and the flaw detection operations were retrained to confirm that there was no problem with the cracked axles reported earlier.
According to an announcement made by CNR (601299.SH) on August 16, the company recalled on August 16 the 54 CRH380BL EMUs that had been put into operation and operated by its subsidiaries. The relevant OEMs and supporting companies were organized to conduct a thorough inspection of the recalled EMUs, systematically sort out problems, thoroughly investigate quality and safety hazards, and ensure that the technical quality of products meets the requirements of safe, reliable and orderly railway transportation.
This has become the first recall in the history of China's high-speed rail. During the operation of the CRH380BL model, malfunctions such as false alarm of hot-axis alarm, automatic drop of bow, loss of traction, etc. occurred continuously.
Earlier, Xie Jilong, Director of CNR Xie Jiong, said in an interview with the Post reporter on the issue of recalls: “The original idea was to troubleshoot those trains on the production line. After the State Council executive meeting, we felt that it was necessary to carry out the trains used on the Internet. Census rectification.†Xie Jilong said that this is CNR's initiative to apply for a recall.
CNR explained that there are three measures for recalling repairs at this time. The first is to replace all the components that are lacking in quality for sub-suppliers. The second is to replace the insulation layer of the sensor. Part of the sensor is not insulated enough, causing the sensor shielding that acts as an anti-interference to be burned off, thus sending out false signals. The third is to adjust the software of the train network control system. This is also the most difficult technical problem in the current recall.
China North Railway's share price closed at 4.58 yuan yesterday, down 1.72%.
The only supplier: Zhiqi Company
According to "New Century" magazine, at present, the supply of high-speed EMU axles in China is highly monopolized. The only supplier is Zhiqi Railway Equipment Co., Ltd. "Chi Chi has introduced a full set of Italian road Qi Ni company's technology, product quality is still relatively strong." North car revealed.
Zhiqi Railway Equipment Co., Ltd. website shows that the company is a Sino-foreign joint venture company under the Shanxi Coal Import and Export Group Co., Ltd. It was registered in October 2007 with a registered capital of 150 million yuan, of which China accounted for 75% and the foreign party accounted for 25%. It is currently the only high-speed EMU wheelset production and maintenance base in China.
The "New Century" magazine reported that one of the company's actual controllers was the Shanxi businesswoman Ding Shumiao. Due to suspected high-speed rail tenders, Ding Shumiao has been investigated by relevant authorities.
The Zhiqi company website shows that Zhiqi Railway Equipment Co., Ltd. introduced the advanced technology of the Italian Road Chini Railway Products Group. The company's products include EMU wheel pairs, regular passenger wheel pairs and MTR wheel pairs. Among them, the EMU wheelset products cover all the four CRH1, CRH2, CRH3 and CRH5 vehicle lines of the China High Speed ​​Rail Harmony EMU and all speed platforms ranging from 200 km/h to 500 km/h. Products have been used in Beijing-Tianjin Intercity, Wuhan-Guangzhou high-speed rail, Zheng West passenger specialties, Shanghai-Nanjing intercity, Beijing-Shanghai high-speed rail and other high-speed rail lines.
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