My family is a professional duck breeder. Grandpa picks up hundreds of duck eggs every day by the pond. Squatting down and standing up
... makes Grandpa's back ache and his legs ache. In order to reduce his workload, I have tried many times and
designed an egg picker. Grandpa can pick up the eggs and put them into a laundry list without the need for a cat's waist.
The other end is sawed into a bevel. Cut off the lower quarter along the round end face of the bamboo tube. Then put a wooden handle on the side of the bamboo tube. The production is finished.
When using, put the bamboo tube flat on the ground, with the bevel facing the duck eggs, and pinch the eggs into the tube.
You can pick up five eggs at a time and put them into the basket. If you don't add enough food, the chickens will starve. If only there were a trough that can automatically add
food, you can automatically add as much food as you eat, and you won't add it when you are full.
According to this idea, I designed an automatic chicken feeder (as shown in the figure): the feed is placed in the rectangular
feed box above, the bottom of the feed box and the trough are bent by a piece of iron, and there is a just right one between the bottom and the front side plate of the feed box.
Replenish the feed in the trough. Stop pecking, and the feed will not leak down.
Zhu De
Automatic water feeder
This water feeder is simple in structure, and it is convenient for poultry and livestock to drink water.
As shown on the right, nail an upright post on the edge of the trough, and nail two bottle clips made of lead wire to the upright post.
First, put it into the trough. Let the bottle mouth be right next to the water surface in the tank. Let go of your fingers, and the water in the tank will not flow out. This is
the atmospheric pressure at work. When the chicken goes to drink water, when the water surface in the tank drops off the bottle mouth, air will
enter the water bottle from the bottle mouth, and some water will flow into the tank. When the water surface in the tank is flush with the bottle mouth,
the water will not flow. This is a water feeder that can automatically add water. Make a big water feeder. But it should be noted that
the bucket cover behind the wall must be tightly covered, and there can be no air leakage.
Wang Jun
Automatic siphon
The most convenient way to change water for the fish tank is to suck out the old water with the siphon, and then inject new water. Previously,
water was injected into the siphon by mouth, or a piston was added in the siphon. I designed an automatic siphon.
The automatic siphon is shown in the figure. At the lower end of a section of latex tube (or plastic pipe), a sieve cover made of plastic medicine bottle is installed, and at the upper end of the pipe, an airbag made of rubber ball is installed. There are two holes in the rubber ball.
A valve tube on a bicycle inner tube is installed in one hole, and then latex tube is sleeved on the valve tube. The other hole is made of water
.
When using, first plug the water outlet hole with your fingers, pinch the ball flat, and immerse the end of the screen cover in the water.
Slowly loosen the ball, and when the latex tube is full of water, hang one end of the water outlet hole and the water will automatically flow out.
Jerry Lee
Magnetic grass mixing stick
In the past, the production team had one. Dad has to sift carefully and pick out the nails, wires and
iron filings in the forage.
Eating iron by mistake is so harmful, how can I clean them up quickly? I put a magnet on the reed horn at the lower end of the straw mixing stick
. While mixing the grass, it sucked the iron in the forage
. I named it magnetic grass mixing stick.
Yang Jianan
made cats and dogs afraid of chickens
Several families in our team kept cats and dogs. They caught and ate chickens as soon as they saw them. In 1981, a family
bought more than 3 chickens, all of them in less than 2 days. I'm still a little afraid of them. Why
At first, my mother bought chickens, but she didn't dare to put them on the ground. Instead, she put them in a basket and hung them on a hook
high. When I was at school, I saw a group of bees and thought, People are bigger than bees, but they are afraid of bees because they are afraid of being stung. We won't think of a way to scare dogs and cats.
I grabbed a chicken with my right hand, let its head stick out from the tiger's mouth, and held a needle between my thumb and forefinger.
The needle tip is a little longer than the chicken's mouth. Then I caught the cat and dog, and used the needle hidden under the chicken's head to prick the cat and dog's
mouth and nose for a dozen times for three or four days. Ha! How effective! Cats and dogs are
scared when they see chickens. Not only are they afraid to pounce on them, but they also give way to them. When they are eating, the chickens scramble to eat.
When they see the chickens coming to the bowl, they avoid them.
Zang Ronghua
After many experiments, I designed a good way to catch mice.
Looking for them. Saw it into a disc with a diameter
about 5 mm smaller than the inner diameter of the water tank, and fix a thin
rod with a length longer than the outer diameter of the water tank on the middle line of the disc as a turnover plate. The lighter the material, the better.
After the turnover plate is finished, put both ends of the thin rod on the cylinder mouth, and one side of the turnover plate is also on the cylinder mouth, so that the plate surface is
parallel to the cylinder mouth, so that the turnover plate can be placed on the cylinder mouth. There is a little food that mice
like to eat. As long as gluttonous mice step on the flipper, they will be doomed to drown.
Zhang Zhuxiang
Sand Precipitator
Our school uses a pump to pump water, but after pumping for a while, it won't be filled with water. Our science and technology team took the water pump apart and saw that the sand brought by the well water was accumulated in the pump. We installed a veil in front of the impeller. Unexpectedly, after pumping water for a while, the water was stopped. It turned out that the pipeline in front of the veil was blocked by sand.
Finally, we installed a vertically downward pipe in front of the veil, and the lower end of the pipe was sealed with a cover,
which made this sand catcher. After the sand pumped with water was blocked by the veil, it automatically entered the pipe below < Find six sturdy wooden sticks and two axle wheels (other wheels are also acceptable), and install a water truck to lift
according to the figure. Hang an iron hook on the head of the truck. When lifting water, just hang the bucket on the hook and push
the truck with your hands. This truck can also be used to transport coal or other things without any effort.
The water truck uses the lever principle.
The pool is on a high slope, which is far away
. In the computer room, you can't see whether the water in the pool is full, so you often have to go to the pool to check.
In order to avoid running back and forth, I designed a water level reward device for my father.
As shown in the figure, the square wood with contact pieces is fixed on the edge of the pool, and the wooden board with electric bell, power supply and switch is fixed in the computer room. The contact
piece on the wire rises with the buoyancy of the float, connects with the fixed contact piece, and the circuit is connected. As soon as the electric bell in the machine room rings,
you will know that the water in the pool is full.
When not pumping water, open the knife.
Zhong Yongping
Paddy field irrigation water level controller
In order to win a bumper harvest of rice, the water manager often needs to irrigate the paddy field according to the paddy field situation. This automatic water level control device is designed. When it is installed at the gate of rice border
, just open the gate and adjust the buoy according to the required water level, and the water can be released safely. When the water level reaches the requirement
, it will automatically close the gate and stop irrigation.
The device is shown in the figure, and the gate is pulled open with a drawstring, and then the brake lever is lifted to hold the live bolt, so that it can be < The lever presses down the brake lever, releasing the movable bolt, and the gate is pulled down by the rubber band, thus closing the water inlet.
The unsinkable bucket of the Science and Technology Team of Town Primary School in Fengxin County, Jiangxi Province
There is an eye well at the door of my rural hometown. When fetching water, people often drop the bucket into the well, and it takes a lot of effort to get it out.
I want to, I want to. You can make a bucket with a double bottom.
There is a space between the double bottoms to keep it from entering the water. If such a bucket falls into a well, it can float on the water surface, which is
very convenient to pick up. The size of the double bottom space should make the weight of water in the bucket greater than that of the iron bucket itself.
Zhang Xiaoge
A bucket with a valve
When drilling a well. It's really
urgent.
I thought of a way to open a hole bigger than an egg at the bottom of the bucket, and cover the hole with a thick rubber, and one side of the rubber is fixed with nails. In this way, the bucket is put into the well, and water flows into the bucket from the hole. The bucket is full of water. When it is lifted up, the rubber is pressed down and covered by the pressure of water. It saves time and effort.
Shen Wenhua
Looking for a bucket with a magnet
The bucket fell into a deep well, which is difficult to salvage.
If the bucket is made of iron, you can tie a magnet with a rope and put it down into the well, and turn it for several times, then you can
touch the iron bucket and suck it on it. According to the position indicated by the magnet, you can lower the fishing hook, and then
. It's easy to get the bucket out.
Zheng Atao
Safety pulley
Use the pulley to shake the water. If you get rid of it, the pulley handle will easily hurt your arm.
I have installed the anti-reverse teeth on the pulley, so it won't reverse. When releasing the bucket, just put the <
It's really not easy. I saw that the front and back doors of the room were opened, and through flow was very big. I also saw that the China Youth Daily introduced a small wind-driven production, so I made a winding machine using through flow.
Please have a look at the picture.
Wu Xiangshu
Plastic bonder
Plastic bag or plastic film supplies are broken. Designed as a simple bonding soldering iron, the use effect is good.
Take a copper coin (or a small round iron piece) and drill a small hole in the center of the circle. Find a length of metal pipe (the length is fixed since
), and open a groove at one end according to the radius of the copper coin, and drill a pair of small holes at the end of the groove. Put the copper coin into the groove,
Align the center hole with the small hole, and use iron wire as the axis. Fix the copper coin on the end of the metal tube slot. Note that
the copper coin must be able to roll freely in the slot. Put a plastic tube or bamboo tube on the other end of the metal tube as a handle.
When gluing, first put the plastic film to be repaired on the table, put a cellophane on it, heat the
bonder to about 1 degrees Celsius, and roll it over the cellophane with appropriate pressure. Temperature. The temperature is low, the scrolling speed is slower, and the pressure is higher.
Zhu Qingyang
The light at home is dim, and reading and doing homework at night is easy to damage your eyes. I designed a kind of condensing screen,
which can increase the brightness of the reading place.
Take three thin wooden boards (cardboard is also ok) with hinges, and stick a bag on one side < Just
I can gather in the place where the books are kept.
Surrounding with three mirrors like above can also play a role in gathering light.
Zheng Chen
I use crutches
I have a problem with one leg, so I have to use crutches to walk. However, I am very tired when waiting for the bus and standing in line.
I think other disabled people may have the same difficulties. I worked on my crutch.
After repeated consideration, drawing and experiment, I finally designed a light and practical dual-purpose crutch (as shown in the figure).
Add a sitting board in the middle of the crutch, and the upper part is connected with the double columns of the crutch by hinges, and the lower part is connected with the single column of the crutch by hinges. It is a single crutch when stacked, and it is also a folding chair when erected.
Single ladder and handcart are used for many purposes.
The three legs are separated, and the hook below is hung, just like the four-legged ladder, so it becomes a double ladder. Turn the third leg
up along the middle hinge, insert a bolt to fix it, and you can connect the two ladders to form a two-legged
single ladder. Pull out the shaft of the middle hinge, remove the third leg, and the remaining two. Give full play to the potential of a tool.
Zhang Zhongdong
Simple microscope
I designed a simple microscope, all of which was waste. Find an empty toothpaste shell, cut off the part above the neck
and wash it. Cut a small piece of transparent adhesive tape and stick it on the nozzle of the toothpaste shell, which is the
objective table.
Find a cone.
Take out the condenser glass ball on the head and embed it into the small hole to form the eyepiece. Put the specimen to be observed
(such as spider's foot) on the stage, cover it with a toothpaste shell, and turn the cover (that is, adjust the focal length)
until you can see the object clearly.
Chen Ping
The flashlight microscope
Cut it with cardboard or cards. A glass ball in a spotlight
electric ball is embedded in the center as a lens. As shown in the figure, put the observed object in the center of the flashlight glass,
put a small spring on the glass, put a circular piece of paper with a lens on it, and then put it on the flashlight
head together, and the microscope will be ready.
Turn the screw ring of the flashlight head, You can adjust the distance between the lens and the object. The flashlight light can be
used for lighting.
Li Weixian
Dual-purpose pad
When doing homework, I often can't find a ruler. I thought of a way to borrow a ruler from my classmates.
Draw it on the pad according to the scale on the ruler and mark it with numbers. Ha! I have a dual-purpose pad. Students
, please try it!
Guo Yuefeng
Dual-purpose eraser
When doing his homework, he has to use an eraser when he makes mistakes in writing and doing wrong questions. After wiping, he always leaves some rubber crumbs and paper wool, so he has to put down his pen and pat them off with his hand, which is quite annoying.
"If only he had a brush." Right! You can make a dual-purpose rubber yourself.