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Liang Yuan patted the drawings on the table and said, "Uncle, it's the turn of the next batch of 25S cars to enter Beijing for T1112." ”

Liang Haiping nodded and said: "Director Liu said that if you get enough one group, you will change it, and yesterday he also said that let's step up production and strive to complete the replacement of the four groups in Beijing after the New Year." ”

Liang Yuan smiled and said, "Uncle, remember what I told you about the electrical plug door, no, Lao Su and I will do this now." ”

"Xiaoyuan, why did you come up with this?" Liang Haiping asked with some confusion.

"It's a bet, of course. Liang Yuan said unconcernedly: "I plan to ask my uncle for a 25S car bottom and hang it on the T2728 times, but there has to be a suitable reason for not." ”

Liang Haiping laughed and said, "Xiaoyuan, this is obviously a trick." ”

Liang Yuan and the two little girls made a bet on whether they could take the double-decker train when they went home for the New Year, instead of the T2728 entire formation and dressing, Liang Yuan pushed the boat down the river and used the entire formation to change clothes to confuse the sight of the two loli, increase the difficulty of the matter, and then watched the two loli jump into the big pit.

Liang Yuan said with a triumphant smile: "The two of them have not won against me since kindergarten. ”

Su Liangyu saw Liang Haiping and Liang Yuan laughing very happily, and asked curiously about what happened, Liang Haiping told the two little girls about the bet with Liang Yuan, Su Liangyu also laughed after hearing it and said: "I said why is Xiaoyuan so diligent today." ”

"In a few years, for quasi-high-speed rail. For high-speed railways, urban subways, light rail, luxury highway buses, and minibuses, electric plug doors can be said to be necessities. Liang Yuan said with a smile.

Liang Haiping didn't know much about electric plug doors, Su Liangyu was very familiar with this kind of thing abroad, nodded and said: "As early as five years ago." Newly produced highway buses, buses, and rail transit vehicles from abroad. Electric doors of this structure have already begun to be used in large quantities. ”

"Uncle, you must not have noticed, the T1112 from Shengjing to Beiping and the T1314 from Wusong to Beiping both depart from platform 2 at Beiping Station, and one of the two trains departs at 6:32 p.m. One is at 6:35 p.m., T1112 walks three minutes early. ”

"Lao Liu made the Liaodong Peninsula so luxurious, not without the meaning of saying goodbye to the T1314 times of the Shanghai Bureau, uncle, you said to replace the T1112 times with an electric door, the new type of electric door Lao Liu will not be very supportive. Liang Yuan said with a smile.

"Are you playing the Shanghai game?" Liang Haiping debunked Liang Yuan's careful thoughts.

T1112 and T1314 times of the "grievances" have to start from the founding of the People's Republic of China, 49 years with the loud voice of the great man, New China stood up in a ruin, when the railway system in the northeast of the Republic was the most perfect, and the entire industrial base of the Republic was in the Northeast when the founding of the People's Republic of China, Shengjing as a representative city of the industrial base. The state awarded the honor of 1 and 2 express trains to the passenger marshalling from Shengjing to Beiping, after all, the great, glorious and correct China is the vanguard of the working class, how can there be no reason not to award the honor to his mother's family.

At that time, although Wu Song was able to throw out the eight streets of Shengjing in terms of urban scale, prosperity and popularity, it was a pity that he did not go through the Great Wusong of the Three Anti and Five Anti Movement in the 50s. It was also a distribution center for petty bourgeoisie and imperialist compradors, speculative businessmen, and had to be relegated to 3 times, 4 times.

Interestingly, with the change of the climate of the Republic of China, the honor of the 1st and 2nd express trains from Shengjing to Beiping was handed over to the passenger marshalling from Beiping to Changsha. The numbers of the 3 and 4 express trains from Wusong to Beiping were handed over to the international train marshalling from Beiping to Moscow, and the pair of brothers and sisters became 1112 times and 1314 times, continuing the previous "grievances".

This kind of healthy competition continued until the nineties, with the decline of the country's vigorous development of Pudong and the old industrial base in Northeast China in the early nineties, the winners and losers were gradually divided, and the economic differences made the two sides further and further apart, and by the mid-nineties, 1112 times were no longer able to keep up with the pace of 1314 times.

After entering the new century, with the completion and operation of the Beijing-Shanghai high-speed railway between Beiping and Wusong, 1,314 gorgeous turns became G1,314 times with a speed of 380 kilometers per hour, and the old 1,112 times continued to run at a speed of 160 kilometers per hour, staggering between the white mountains and black waters and the land of Yanzhao.

In the eighties, the development level of the Yangtze River Delta urban agglomeration and the Bohai Rim urban agglomeration is basically the same, T1112 times and T1314 times just fight equally, if it is just an air-conditioned double-decker bus, for the Shanghai Bureau, whether to replace the same air-conditioned bus T1314 times under the car will hesitate, after all, the 25S type car has not passed 300,000 kilometers of stereotyped operation and routine dismantling.

But if Liang Yuan gets the electric door out, it will definitely become the last straw that crushes the camel, and he can imagine that he is also about to depart, while reaching out and pressing the button, the door will automatically close slowly, and at the same time, under the nose of the old enemy, he will put down the flap first, and when he closes the door, he has to take out the key and screw it a few times, and throw his face under the nose of the Ministry of Railways. If this situation really happens, it is absolutely impossible to accept the mentality of the Shanghai Bureau that it is the first in the whole road in the level of Laozi's vehicle equipment.

Liang Haiping, as a family member of the railway, knows a lot about all kinds of rumors and wild jokes between various road bureaus, and when Liang Yuan said it, he guessed Liang Yuan's careful thinking in a blink of an eye.

For Liang Yuan is a fairy, it is impossible to save the trend of the decline of the entire old industrial base in Northeast China, in addition to retaining the fire in some industries, taking fewer detours, and not being left behind too much by the rapid development of the international community, Liang Yuan can still do very limited in the face of the general trend, so for Liang Yuan, who intends to change the pattern of China's high-speed railway in the future, the sooner he has a relationship with the Shanghai Bureau, the more beneficial it is, and the Beijing-Shanghai high-speed railway in the future will definitely become the pioneer and benchmark of China's high-speed railway.

Before the behemoth named Mitsui in the island country on the other side of the strait is eyeing China's high-speed railway, the time and space left for Liang Yuan to lay the foundation will not be too long, too much.

"But Xiaoyuan, this kind of door you make is not the same as the common electric plug door. Su Liangyu said as he gently tapped the drawing with a ruler.

There are two kinds of plug doors, one is inward, the starting back door is recessed into the carriage, and then moves in parallel, and the other is outward, the starting back door is protruding outward, and then moving in parallel, for global railway vehicles, the inward opening plug door is only the Japanese Shinkansen from the high-speed train of the wind type began to configure, before the wind type was put into operation, almost all the plug doors are outward-opening.

Before the introduction of high-speed rail, China Railway had introduced outward-opening electric plug doors abroad, and it was applied on a large scale on Chinese railways.

For the outward-opening plug door, there is a fatal weakness in the use of Chinese railways, that is, the whole door can only bear 75 kg of weight after closing, beyond the load-bearing range, the door is very likely to fall off from the carriage, and for the inward-opening plug door, there is no such weakness, unless the whole door is broken, it will not fall off from the carriage.

Liang Yuan's previous life, in the nineties Kunming held the World Expo, just at the time of the first generation of domestic production, the power of the centralized traction diesel EMU "New Dawn" off the assembly line, delivered to the Wusong Railway Bureau for use, on this grand occasion Kunming Railway Bureau proposed to Wusong Railway Bureau to borrow the "New Dawn" for the Kunming World Expo.

After some negotiations, the New Dawn was transferred to the Kunming Road Bureau to transport passengers visiting the World Expo, for Chinese railways, train overloading is the norm, not overloaded is a strange thing, so in a certain operation, the "New Dawn" of the entire outward-opening plug door flew out, as for the passenger casualties, it was a secret. This is also the tradition of the republic, in the days of heavy festivity, this kind of matter involving the face and honor of the Chinese nation, whoever dares to report it, whoever destroys the peaceful atmosphere of the World Expo, who is destroying the stability and unity of socialism.

However, since the Kunming accident, the bottom of the electric plug door produced by the Ministry of Railways has been sprayed on the inside of the plug door with a few bright red words "The plug door is strictly forbidden to crowd". This matter was only learned after Liang Yuan worked in his previous life, and he met a friend who worked in the "CNR" group of the Ministry of Railways.

"The farther away from that thing, the better, sometimes there is an electrical failure, and the plug door will open automatically for no reason when the train is running, and the probability of failure is about 0.09 per thousand. The engineer of CNR said

"I made this one open inside, and the plug doors that Lao Su saw before should be open outside. Liang Yuan said.

After learning about the accident in Kunming, Liang Yuan also deliberately went online to find out the structural drawings of the two kinds of plug doors for comparison, so the general mechanical schematic diagram Liang Yuan could draw it, but the electrical control could only be handed over to Su Liangyu.

"Lao Su, the kind of outward-opening plug door in foreign countries is not suitable in China, a train in our country can be overcrowded by 300 percent, and the door must not be crowded to catch up with the New Year's Festival."

Su Liangyu nodded and said: "I didn't expect the motor control system to be used on the railway first, and I thought it could be used on the bladeless fan made by Xiaoyuan first, but at the moment the accuracy of the control is still a problem, and only the samples can be made before the Lunar New Year." ”

The switch of the plug sliding door is powered by the air cylinder to provide the power of the switch, and the motor controls the action of the switch, so there are only two core technologies of the plug door, one is the precision machining of the drive air cylinder, and the other is the motor control system.

Liang Yuan smiled and said: "As long as Lao Su can load the sample on 25S before the Lunar New Year, I have a reason to get the bottom of the car and hang it on the T2728 times, and I don't care about anything else." ”

Note 1: After running 300,000 kilometers under the car, it should be returned to the factory for dismantling, and after the dismantling of eight pieces, all structural parts must be identified and tested for metal fatigue to test the long-term performance of the bottom of the car. (To be continued......)

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