Doomsday Bunker Upgrade Chapter 381: Shield Machine

Text Chapter 381 Shield Machine

Manufacturing a shield machine is actually not as difficult as many think, because the world's first shield machine was born two hundred years ago at the end of the 18th century, and it also used manual excavation. Compared with the large-scale mechanized shield machine, there is no high-tech part.

Although the early shield machines were simple in structure and lacked any high-tech features, they were the originator of today's modern shield machines and the source of their principles.

Chen Xin wants to build a shield machine by himself, unless he finds another way to design from scratch, otherwise, he can't get around the principle of the shield machine that has laid the foundation more than 200 years ago.

The principle of the shield machine is not complicated. The main principle is to construct a "shield" to protect the tunnel and resist tunnel collapse while the tunneling machine is digging forward, that is, digging and repairing.

Of course, with the advancement of technology, although the principle of the current shield machine is still the same, some large or super large shield machines no longer need to build a "shield" during the excavation process. It is convenient and quick to repair the tunnel directly.

The basic principle of the shield machine comes from a marine organism, the ship maggot, which will continuously dig in the wood, and secrete mucus during the digging process to protect the wood around its body from being corroded by seawater damaged by expansion.

So for Chen Xin, who doesn't need a regular shield machine, he actually only needs to make a machine that can quickly dig in the snow, and support the excavated tunnel so that it does not collapse before the pipeline construction is completed. .

And it's not hard to do both.

Snow is not condensed ice. Although it has a certain degree of hardness, it is easier to excavate than soil. Moreover, the internal texture of the snow is uniform, and there is no complicated structure. You don’t need to consider encountering during excavation. Problems with rock formations or other complex geological structures.

As for the second point, it is easier to solve. With the current ambient temperature, it is only necessary to heat the excavated tunnel wall a little during the excavation process, so that the snow on the tunnel wall melts and condenses quickly, and then the tunnel can be constructed. A layer of ice is used to support and protect the tunnel from collapsing.

After all, it's just snow, not a complex geological structure. A layer of ice shell support is enough.

After clarifying these two points, elementary school students may not be able to make a shield machine that can be used, but middle school students with stronger hands-on skills can complete this design.

A cylinder is used as the main structure. The front is made of a relatively hard metal as a blade or drill bit like a fan blade. A circle of electric heating wires is placed on the outer shell to melt snow and keep the interior warm. This thing is basically completed. Able to meet the needs of construction.

As for the rest, it is nothing more than optimizing the internal mechanical structure and adding a little auxiliary function.

For example, the front fan blade or drill bit can be shaken manually, or a motor can be added to make it mechanically powered. The excavated snow can be transported manually or mechanically. Even Chen Xin is willing to spend some Kung fu, make the whole shield machine fully automatic, as long as it is put into the snow, it will dig by itself and complete the entire construction.

It's just that Chen Xin is a little hesitant about how big a device he wants to build.

Building a large tunnel, directly digging a tunnel, and then workers go in and erect the pipeline, this is naturally a simple and crude way, and the machine does not need to be too complicated and advanced in this way, and it is enough to be able to drive quickly.

However, in this case, the construction speed will be relatively slow. After all, the larger the excavation surface is, the larger the excavation surface will be, the amount of snow that needs to be excavated will be doubled, and the construction period will be shorter. long.

As for making a small one, or simply having only the thickness of the pipe, it will undoubtedly save a lot of trouble while digging and connecting the pipe.

It's only relative. If you build a small shield machine, the technical content will undoubtedly be improved a lot.

After thinking about it, Chen Xin weighed the advantages and disadvantages of the two and chose a small shield machine.

After all, improving the technical content is the easiest thing for him.

With a multifunctional mechanical arm, it is not difficult to process such a shield machine. It only needs to cut a section of pipe, install a drill bit for excavation at one end of the pipe, and then connect a pipe inside for Take away the "shaved ice" that has been excavated, and finally connect the motor to provide power and power, and this thing is done.

Of course, although this thing is said to be done, it can already be used to start work, but if it is really put into use and rely on it for tunneling operations, Chen Xin still needs to give him a small promotion.

For example, it is necessary to install a microcomputer on it, so that the device can be remotely controlled or programmed to work automatically.

Chen Xin even considered attaching a 3D printer to this little thing, which can directly print the pipeline while digging, and even the laying of the pipeline itself can be omitted.

However, after thinking about it for a while, Chen Xin still didn't do it. He just added a remote control to the small shield machine he built ~IndoMTL.com~ to ensure that the machine can be controlled by remote control to move forward, backward, and Just stop.

The final completed shield machine is like a bullet head, the front end is a hollow drill bit, which cuts the ice and snow through the arc-shaped cutting edge, and then the cut snow is swept away through a pipe inside the drill bit, so as to ensure that the drill bit can Go well.

In addition to the pipe behind the drill, there is a heating ring, which is used to heat the snow around the shield machine, so that the snow melts and then freezes quickly under the influence of low temperature, forming an ice shell to stabilize the tunnel.

The power of the entire shield machine comes from a small-power motor installed by Chen Xin, which is responsible for driving the drill bit and the crawler wheels at the bottom of the shield machine to advance, and the power supply relies on a small battery.

After Chen Xin completed the shield machine, he took it to the nearby snow and tried it out. The results of the experiment were very satisfactory.

The drill headed very fast in the snow. Chen Xin only let it drill for about three or five minutes, and then drove forward a distance of more than two meters. According to this speed, one hour is enough time to drive. A distance of 20-40 meters, which is much faster than digging manually.

Seeing that the effect of the shield machine he made was quite good, Chen Xin was satisfied and prepared to let the workers start preparing for construction.

Only at this time, a worker asked Chen Xin a question. The shield machine can indeed drive quickly, but how should the pipeline be put into the tunnel?

The diameter of the shield machine is only a few centimeters thicker than the pipe. It is no problem to put the pipe straight along the drilled tunnel, but this pipeline is not a straight branch line, but there is an elbow in the middle. .

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