Huang Haojie is in the scientific research area at this time, and the disturbances outside can not affect him, as a science and technology as the core of the enterprise, Galaxy Technology is to continue to climb the science and technology tree.

Institute of Vacuum Engineering, which is a special institute.

It was here that the vacuum pipe for the Strait Bridge was developed.

They have successfully produced a vacuum pipe with a diameter of 2 meters, of course, this level of vacuum pipe cannot be put into use.

The direct inside of the pipe must reach at least about 4 meters before it is initially practical.

The vacuum pipeline of the Strait Bridge, the diameter of the planned pipe is 6 meters, and there are a total of 6 double lines, 3 Pingtan - Hsinchu and 3 Hsinchu - Pingtan.

2 of them are passenger lines, 2 are freight lines, and 2 are standby lines (which can be used for special purposes).

Huang Haojie, Chen Wenfeng, the head of the research institute, and Ma Sixing of the Academy of Sciences were looking at a section of vacuum pipeline that had been built.

"Boss, this experimental vacuum pipe, with a total length of 500 meters, we have tested it many times, and the tightness of the pipe has met the standard, and now we are trying to have a diameter of 6 meters in the pipe." Chen Wenfeng patted the transparent vacuum pipe wall.

"How much vacuum can you reach?" Huang Haojie looked at the vacuum pipe and asked.

Ma Sixing on the side explained: "The vacuum degree reaches about 99.99%, and there is still one ten-thousandth of the air residue, which is the maximum limit that can be reached at present. ”

Huang Haojie nodded, in fact, there is no absolute vacuum environment in reality, even in the universe, the so-called vacuum state is just relative.

Because there are various kinds of electromagnetic waves and particles in the universe, and according to the theory of wave-particle duality, electromagnetic waves are also a kind of matter, so that the vacuum is not empty, but there are a lot of matter.

Therefore, human beings can only achieve a relative vacuum, not an absolute vacuum.

The vacuum degree of 99.99% is already close to the vacuum state, which has little impact on the maglev train running at a speed of 1200 kilometers.

In fact, the experts and scholars of the Academy of Sciences, at the beginning, did not need to achieve this near-vacuum state, and their first stage was about 90% vacuum.

However, Galaxy Technology, which has very strong material research and development capabilities, can make pipeline materials with very good sealing.

In this case, simply do it in one step, so as not to change it in the future.

The strength of the material not only improves the sealing, but also reduces the amount of work. At present, the diameter of the vacuum pipe in the 2 meter pipe has a wall thickness of 23 cm.

For the vacuum pipe with a diameter of 6 meters in the pipe, Chen Wenfeng's calculation shows that the pipe wall is between 73~75 cm, and the specific results need to be made after the vacuum pipe is made, so that the accurate thickness of the pipe wall can be determined.

If reinforced concrete is used, it is similar to the hollow reinforced concrete ball of Hans's house, and the wall thickness is not 3 meters, and the atmospheric pressure outside is too thin, which will directly crush the pipe wall.

If reinforced concrete is used as the pipe material, assuming that the inner diameter of the pipe is 6 meters, the thickness of the pipe wall needs to be 3 meters.

Take the median value of the thickness of the pipe wall of 1.5 meters, add the inner diameter of the pipe 6 meters, calculate the circumference of the reinforced concrete pipe, the diameter of 9 meters multiplied by 3.14, the circumference of the circle can be obtained as 28.26 meters.

This makes it possible to roughly estimate how many cubic meters of reinforced concrete pipe will be needed for a 135-kilometer stretch.

The length is 135 kilometers, the thickness is 3 meters, the circumference (width) is 28.26 meters, and the three numbers are multiplied to obtain: 11,445,300 cubic meters.

The price of one cubic meter of ordinary reinforced concrete is 500 Chinese yuan, and the price of reinforced concrete used to make vacuum pipes is at least doubled.

In other words, a 135-kilometer reinforced concrete vacuum pipeline costs 11,445.3 million yuan in materials alone.

In addition, due to the weight of the reinforced concrete pipe, the load-bearing design of the pier must keep up, otherwise it cannot support the huge weight.

The use of FRP composite graphene, 135 kilometers of about 2.15 million cubic meters, FRP composite graphene one cubic meter of cost of about 2,300 yuan, equivalent to 135 kilometers of vacuum pipeline material cost of about 5 billion yuan.

As long as the price is less than half, even if the profit is taken into account, the price will be raised to 7 billion Chinese yuan, which is still promising.

What's more, the performance and service life of FRP composite graphene are much stronger than that of reinforced concrete.

In addition, the weight is only about one-fifth, which means that the load-bearing design of the pier can also be reduced by two or three times, and the load-bearing design of the pier is reduced, and the cost is also reduced.

"Then please Academician Ma, you continue to research and develop, Wen Feng, let's take a look at the situation of the second institute." Huang Haojie said with a smile.

"You are busy, Mr. Huang."

The second institute of the Institute of Vacuum Engineering also studies vacuum, but their direction is different from the first.

Academician Ma just now is the project leader of the first institute, and Chen Wenfeng is directly responsible for the second institute.

Huang Haojie asked as he walked, "Where is your R&D progress?"

"The high-strength elastic film from the Materials Research Institute has been delivered, and we have compounded the strong magnetic repulsion material, which is now being tested." Chen Wenfeng reported the progress to Huang Haojie.

The high-strength elastic film is the "high-strength elastic canvas" obtained by Huang Haojie before, the elasticity of this high-strength elastic film is very amazing, it can be stretched thousands of times, and then quickly return to its original shape.

The two of them entered the laboratory of the second institute.

"Boss, look, this is the high-strength, elastic and high-repulsion film we made according to your idea." Chen Wenfeng pointed behind the thick bulletproof glass and said.

Behind the bulletproof glass is a thin black rope about the diameter of a normal ballpoint pen.

"Give it a try, I'll see how it goes."

"Okay."

Chen Wenfeng hurriedly went to arrange the test, and after a while, the black rope suddenly swelled up, like a balloon that had been blown up.

"Boss, you see this is the test report of the past few days." Chen Wenfeng handed over a document, and after a while, the balloon deflated and returned to the state of the black rope.

Huang Haojie took it and flipped through the experimental test report:

"Can you already maintain the vacuum expansion for more than twenty minutes?"

"Yes! We did an extreme force test five days ago and were able to maintain vacuum expansion for almost 164 minutes, regardless of the material's service life. Chen Wenfeng explained.

Huang Haojie touched his chin and thought for a while, then glanced at the black rope again.

"The current vacuum expansion diameter is about 15 meters, Wenfeng, you try to go to a larger expansion diameter as soon as possible, my goal is to vacuum expand the diameter of about 200 meters."

"We will arrange it as soon as possible, but boss, we are afraid that the power supply of the institute will not be able to keep up, and the test site will not be able to accommodate it." Chen Wenfeng hurriedly reflected some problems.

"So be it! I asked the management committee of the institute to build two experimental bases in Bazhong City, Shu Province, and Kaohsiung City, Dongdao Province, for the use of the two institutes. "Huang Haojie is two bases with a stroke of the pen.

Grunt! Chen Wenfeng was also shocked by the boss's wealth and attention.

"I will definitely let the people in the institute complete the goal as soon as possible."

"Hmmm! In addition, you have to estimate how much the core diameter is needed to achieve a vacuum expansion diameter of 200 meters. How much does it weigh per kilometer?" Huang Haojie then commanded.

"Boss, can I ask how long this cable is?" Chen Wenfeng asked cautiously.

"At least 200 km, if you can do 300 km, and keep the unit weight of the cable as small as possible when you can maintain a vacuum expansion diameter of 200 meters." Huang Haojie said the request.

"Boss, if you want to use this cable as a vacuum pipe for the Strait Bridge, I'm afraid there won't be enough time to maintain the vacuum, after all, the train needs to run for a long time." Chen Wenfeng hurriedly reminded.

"I have my own plan, you will complete the R&D design as soon as possible." Huang Haojie didn't explain anything.

"Alright then!" Chen Wenfeng could only nod helplessly.

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