Go back to the prosperous days and become a layman

Chapter 65 Pressure Cooker

"It doesn't matter what it is. If you want to cook rice, you have to rely on strong firepower." Mark Jian was almost done drinking. After listening to Tang Zhitong's words, he muttered and didn't know who to tell.

"How do you know?" Wu Haiyang became more awake and was stunned after hearing this, "I didn't say where it happened just now, did I?"

"You didn't say, I guessed it myself." Tang Zhitong shook his head. No matter how good the wine is, he will feel dizzy after drinking too much.

"How did you guess it?" Wu Haiyang asked.

"I enrolled in an adult amateur technical secondary school a while ago. Sometimes I would sit in on some different courses there, which opened my eyes and learned a lot." Tang Zhitong burped and subconsciously answered the question. Yuan came back, "I guess the two situations you mentioned are in high altitude areas. In physics, there is a concept called atmospheric pressure. The higher the altitude, the lower the boiling point of water. It looks like it is boiling, but the water temperature is actually lower. Above 100 degrees, that is, it is actually not boiled in the traditional sense. This is also the reason why the rice is undercooked.”

After hearing what Tang Zhitong said, Wu Haiyang believed most of it and asked expectantly: "Since you have guessed it, do you have a solution?"

"No." Tang Zhitong shook his head and said. The concept and prototype of pressure cooker are available abroad, but not in China!If you don't take some time to think about it, and immediately give a solution to a problem when you hear it, that's not smart, it's called death.

"Then you go back and think about it, and come up with a way to tell me." Wu Haiyang was not disappointed after hearing this, and told him smoothly.

"Okay, then I'll go back and think about it." Tang Zhitong agreed readily.

Wu Haiyang is the oldest among the people present, and his personality is also more stable than Tang Zhitong's.After seeing the appearance of Gu Yong and Mark Jian, Wu Haiyang stopped mentioning the wine. It was a very festive day. The purpose of this gathering was mainly to deepen the relationship, not to let anyone get drunk.

After the banquet, Dr. Lu served tea and nominally asked Wu Haiyang to accompany the brothers to drink tea and chat. In fact, he wanted them to drink more tea and sober up as soon as possible.

After a few people woke up a little, they went back to their respective homes to find their mothers.

Tang Zhitong was really concerned about the issues Wu Haiyang mentioned during the meal.

If the problem comes out of Wu Haiyang's mouth, then it is not a local matter. He is troubled by this problem, which shows that not only has the adverse effects of air pressure not been solved, but there is also no water purification equipment.

In this era, Tang Zhitong is very happy to make a small contribution to his family and country.

Both of these problems are related to air pressure, but you don’t necessarily have to repair the pressure cooker. If you want to get around it, there are still ways.

Let’s take water as an example. It’s nothing more than unclean. There are some dirty things in it that are invisible to the naked eye. Filtering, reducing, and killing them are all good ways.

Filtration generally uses physical properties to remove harmful impurities and retain water molecules without causing secondary pollution.

Reduction is to use hypochlorous acid and sodium chlorite. The advantage is that it is easy to carry, but the disadvantage is that it takes a long time, and chlorite causes cancer...

Disinfection is probably the simplest. In sewage, just drop a few drops of iodine in proportion to the solution. However, there are not many iodine in China because hospitals have been using red and purple liquids for sterilization.

Tang Zhitong analyzed the pros and cons and still felt that the filter + pressure cooker model was more practical.

If you do filtration, you will get clean water.In fact, water purification concepts and equipment have been available abroad for almost 20 years. However, because the materials are not up to standard, the water purifier is too large and inconvenient to use.

Tang Zhitong plans to make a miniaturized one. The filtration effect will definitely not be that good, but when used with a pressure cooker, it will definitely eliminate 99.99% of diarrhea and abdominal pain caused by water quality problems.

It is difficult to be original, but it is relatively easy to imitate and copycat.

Tang Zhitong had no art skills, and the design drawings were terrible. Fortunately, he could express it clearly.Thanks to his identity as a courier, Tang Zhitong asked the Security Department to find a technician.

First, find a factory to make the pot body, go through the formalities, ask the leader to approve a note, hand over the money to the treasurer, and the rest of the technicians will handle it. Of course, you must give two packs of cigarettes.

Tang Zhitong chose to make an aluminum pressure cooker, which is rust-free and light, but the price is not cheap. The price of cooked aluminum is more than one yuan per pound.

Find another factory and follow the same process to make pot lids.

The pot lid is a little more difficult. It is a snap-on type. You need to reserve the position of the sealing ring so that it fits tightly with the pot body.

As for pressure-limiting valves and safety valves, Tang Zhitong did not develop lever-type or spring-type valves. Both of these required precise calculations and repeated tests. He had neither time nor funds...

Tang Zhitong played a simple and crude way. He cut two small holes in the pot lid, then put in two steel blocks, one large and one small, and framed them with rivets.

The small one is a pressure limiting valve and the large one is a safety valve.

As long as the weight of the small steel block is calculated, when the pressure cooker reaches the predetermined pressure, it can lift the steel block to exhaust and relieve pressure.

If you want to quickly release the pressure, use chopsticks to insert horizontally into the round hole reserved on the large steel block to cause the pressure to release.

Simple and practical, the weight of the steel block can be calculated through simple physical formulas.

The structure of the water purifier is also very simple. It is similar to two pumps welded side by side. One side stores water and the other side purifies. The bottoms of both sides are connected through one-way valves to form a U-shaped structure.

There are hoses at the water inlet and outlet. The water inlet is under the water storage side and is equipped with a one-way valve. By pulling the piston, water is sucked into the pipe, and then the piston is manually pressed down, and the one-way valve at the water inlet is closed. , the water will flow to the purification side through the one-way valve at the bottom of the U-shaped pipe, and the purified water will flow out through the top of the purification pipe.

To put it bluntly, the purification device is very simple. There is no permeable membrane. The main raw material is charcoal. Some rags are stuffed into the upper and lower ends of the charcoal...

Since it is a prototype, the sealing effect is not ideal.

Although these are minor problems, Tang Zhitong's personal ability is limited and he cannot coordinate more resources. It is indeed impossible to solve them. In the end, Wu Haiyang has to coordinate.

It took Tang Zhitong a week to get these two gadgets, which cost him more than ten yuan. This was also the first time that he spent his own money on public affairs.

Although it cost money, I was happy.

On another Saturday afternoon, Tang Zhitong came to Wu Haiyang with the completed prototype. He presented all the design ideas and concepts in person, pointed out where improvements were needed, and then gave up.

"That's a good idea! If it's really feasible, I'll give you credit!" Wu Haiyang happily patted Tang Zhitong on the shoulder and said.

"We are not a system. Asking for credit is causing trouble to Brother Yang. If the improvement is successful, you can help me build two pots and I will pay according to the price." Tang Zhitong declined the request and asked to buy a pressure cooker.

The pressure cooker is great. It can stew pork ribs, stew rice, etc. It is not only soft and fragrant, but also has a small taste!This can greatly reduce the risk of being discovered by neighbors in the next few years that you are eating well.

　Happy National Day!
　　I have to pack up and go to the hospital o(╥﹏╥)o
　　
　
(End of this chapter)