The whole family travels through time and space, and the three of them struggle together

After hearing what his second brother said, Zhou Dahe raised his hand and asked, "Where is the manual water pump fixed?"

Zhou Dajiang: “That’s a good question. The reason I didn’t say it’s a fixed location is because I want to use it for other purposes.

If it's just a water pump, it would naturally need to be fixed to the manhole cover. Since I have other uses for it here, I didn't mention this step. You can add a fixing base on the drawing so that it can be used independently."

Carpenter Tian also raised his hand. "Um, can the connecting shaft connecting the handle and the handle bracket be made of iron? I'm worried that the wooden connecting shaft is too thin and will break after a while."

Zhou Dajiang nodded: "Okay, you can change the material of each part according to the actual situation. What I am providing now is just an idea."

Zhou Dahai: "How can we test the sealing of an assembled water pump? Also, do we have to go to the well to do this test?"

Zhou Dajiang nodded, "This is a key issue.

If the seal is not good, there may be two situations: one is that no water comes out of the outlet, and the other is that although water comes out, the water flow is very small. When these two situations occur, it means that one of the parts is faulty and needs to be returned for reassembly.

Then he thought for a moment and added, "You don't have to try it at the well. You can just find a bucket and put a lid with a hole in it, and you can try it there too.

Zhou Dajiang was delighted after answering. "Hmm! Everyone's got the same idea." It seemed he could let go a little more from now on, just throw out an idea and let them figure it out on their own.

Then he continued, "Any other questions? If you can't think of any right now, you can always come back to me later to confirm. Of course, my ideas may not all be correct. We can discuss and learn from each other."

After pausing for a moment, and seeing that no one had any questions, he continued, "Since everyone has no questions, let's move on to the next product, the bellows."

After he finished speaking, he looked at Xue Ren and said, "Copper, can we buy it?" If not, then he would have to change his thinking.

"Yes!" Xue Ren gave him an affirmative answer.

"That's great. The raw material for our next product is copper."

Then he looked at Zhou Dahe and asked, "Can we process the copper into copper tubes? The wall thickness must be the same."

Zhou Dahe swallowed his saliva and said, "It's a little difficult, but it shouldn't be a big problem."

"Okay, then. How about this second product? Can we also make it as thick and thin as the first product's outlet?"

The difficulty was increasing. Zhou Dahe gritted his teeth and nodded, "Okay."

"Okay, you can just process it here for the first step."

Then, Zhou Dajiang took out another drawing. This was a corrugated tube made of plastic that he had drawn before. Although the material had changed, the shape was the same.

"The next step is to turn the straight copper tube into a bellows that can be bent at will."

Zhou Dajiang still looked at Zhou Dahe. "Starting from the center of the copper tube, continue until an inch before the edges on both sides. If you want to process it into corrugations, do you have any method?"

If not, I have to think about how to make it in one go.

Zhou Dahe took the pen and a blank piece of paper, wrote and drew on it, then looked at his second brother and said, "Yes!"

Even Zhou Dajiang was surprised. His younger brother has a strong learning ability!

He couldn't help but wonder, "How do you do that?"

Zhou Dahe drew with a pen and said, "If I know the depth of the corrugation, I will first make a solid rod and insert it into the copper tube. This solid rod is just to prevent the copper tube from being squeezed and deformed, so the diameter will not exceed the inner diameter of the corrugated tube.

Then, make a concave and convex die with the same depth as the corrugation, install it on the punching machine, and then put the copper tube with the solid rod on the punching machine to press it, and that’s it.”

Zhou Dajiang thought about it according to his idea and thought, well, that's OK. Then he reminded: "When making the concave and convex molds, pay attention to both sides and don't make them closed."

"Yeah, I know that."

So, the second bellows was solved.

Then, Zhou Dajiang took out the drawings of the third product, a sprayer.

The sprayer consists of three parts. He pointed to the first part and said, "This part is actually a pressure pump equipped with a medicine box. You see, there is a medicine bucket at the bottom. The pressure pump is fixed to the lid above. Then, an extra section is added to the push handle to make it a push-pull handle so that it can be pushed forward."

After a moment's thought, he added, "You don't have to fix the manual water pump to the lid. You can leave a hole in the lid of the medicine bucket that can fit the bamboo tube, and then make a separate bracket to fix the water pump. You can modify this later. Let me first talk about the one I drew. I fixed the two together. Then, connect the water outlet to the bellows."

At this point, he looked at Carpenter Tian and asked, "If we want to connect two round tubes made of different materials, we also need to pay attention to the sealing. Can the mortise and tenon structure do this?"

Carpenter Tian nodded. "It can be done, as long as both have edges or rims. We can fix it by cutting grooves on the edges of round incense sticks."

Zhou Dajiang continued to ask: "Can it be made watertight?"

Carpenter Tian still nodded, "Okay."

Zhou Dajiang nodded vigorously. The craftsmanship of ancient craftsmen was really exquisite!

"That's good. If the mortise and tenon structure can be done and there is no leakage after the connection, then I don't need to do the next step because it is too troublesome.

However, you can learn about it first and study it when you have the opportunity in the future.

After saying that, he took out a picture. On the picture, there were two enlarged joints, and spiral patterns were drawn on both ends of the joints.

He pointed to the rotating lines and said, "I call this part with the rotating lines a thread. As for this joint, you see, it has threads inside the pipe wall, so it is called an internal thread.

The other one has the thread exposed outside, so it is called external thread.

To process it, you need something similar to a drill bit, which I call a tap. It needs to be made of refined iron, and the shape of the tap is roughly like this."

Zhou Dajiang was talking as he drew. He first drew a long round bar, then made the front end of the long round bar slightly thinner. He explained as he drew, "My drawing skills are limited, so the thing I imagined looks something like this. The slightly thinner part is threaded, but the thread is broken. Because the machining debris inside needs to be discharged, a chip groove is machined before the thread is machined. The broken thread is the chip groove."

He then drew a front view and four straight grooves on the front end. He then said, “First, make four grooves like these, or rotating chip grooves will also work, and then make the threads.”

After that, he pointed to the tap diagram and said, "Because making taps or processing threads requires re-making processing equipment and quenching, I am proposing this concept first. You can learn about it first and then conduct further research when there is an opportunity."

Then he turned to the main topic, "Now that the connection problem has been solved, let's move on to the third part."