Ultrasonic waves propagate in the liquid, causing the liquid and the cleaning tank to vibrate together at the ultrasonic frequency. When the liquid and the cleaning tank vibrate, they have their own natural frequency. This vibration frequency is the sound wave frequency, so people hear the buzzing sound. With the continuous development of the cleaning industry, more and more industries and enterprises have used ultrasonic cleaning machines.
The advantages of the ultrasonic cleaning machine are: the ultrasonic cleaning effect is good, and the operation is simple. The sound that people hear is a sound wave signal with a frequency of 20-20000 Hz. The sound wave above 20000 Hz is called an ultrasonic wave. The transmission of the sound wave propagates longitudinally according to a sinusoidal curve, producing a large number of small bubbles. One reason is that partial tensile stress occurs in the liquid to form negative pressure. The decrease in pressure makes the gas originally dissolved in the liquid supersaturate and escape from the liquid and become small bubbles; the other reason is that the strong tensile stress tears the liquid apart. "A void is called cavitation.
ultrasonic cleaner,ultrasonic cleaning machine,dental ultrasonic cleaner Suzhou Escomedical Equipment Co.,Ltd , https://www.escodental.com
For the principle of ultrasonic cleaning machine, the high-frequency oscillation signal sent by the ultrasonic generator is converted into high-frequency mechanical oscillation by the transducer and propagated to the medium-the cleaning solvent. The ultrasonic wave radiates forward in the dense and dense phases in the cleaning liquid. The flow of liquid produces tens of thousands of tiny bubbles with a diameter of 50-500μm, and the tiny bubbles existing in the liquid vibrate under the action of the sound field. These bubbles form and grow in the negative pressure zone where the ultrasonic wave propagates longitudinally. In the positive pressure zone, when the sound pressure reaches a certain value, the bubbles increase rapidly and then suddenly close. And when the bubble is closed, a shock wave is generated, and thousands of atmospheres are generated around it, destroying insoluble dirt and dispersing them in the cleaning liquid. When the group particles are wrapped in oil and adhere to the surface of the cleaning part, the oil is emulsified and solid Particles and detachment, so as to achieve the purpose of cleaning parts purification. In this process known as the "cavitation" effect, the closed bubble can form a high temperature of several hundred degrees and an instantaneous high pressure of more than 1,000 atmospheres.
Planting vegetables from Qiaofu gains income
"From 'early and clever' efforts to increase revenue." Yu Yongsheng, general manager of Kai County Agricultural Development Co., Ltd., quietly told the author of this commercial secret.
Yu Yongsheng said that the word "early" refers to the early listing of agricultural products, and the price of products sold early is higher; that is, the color of vegetables cultivated is good, and it becomes a "hot loan" to sell; Recycling of planting bags saves management personnel energy and saves costs, and realizes that both enterprises and migrant workers have benefits.
Feeding eggplant seedlings with vegetable oil
Yu Yongsheng, general manager, introduced his company's eggplant planting smooth skin, bright green color "eye-catching", selling prices and high. One pound of eggplant sells 2-3 more than others' eggplant. Last year, he planted more than 50 acres of eggplant in greenhouses, earning more than 50,000 yuan in this alone. The main technique is to apply a drop of rapeseed oil to the eggplant seedlings or eggplant seedlings after the eggplant seedlings are transplanted and allow the eggplant seedlings to absorb their nutrients.
Heating vegetables
Yu Yongsheng said: “In order to ensure safe wintering of greenhouse vegetables and the morning market for vegetables, we have to sell a good price. In the winter and spring, he uses a steam boiler to deliver greenhouse heating and temperature control to the greenhouses. The original coal to spend more than 20,000 yuan, compared to electrical appliances. The temperature control saved about 20,000.In the spring of this year, his company cultivated more than 30,000 strains of bitter gourd commodity seedlings, creating a net income of more than 140,000 yuan.
Planting and collecting products
"Our company provides land, technology, and greenhouse facilities at no charge, and uses the labor force of nearby villagers. It adopts 'three-setting' measures to increase the enthusiasm for planting of migrant workers. Their land is turned into packets for them to grow vegetables, and the yield per egg is 3,500 kg. A fixed labor compensation of 0.6 yuan per kilogram, and a bonus of 0.7 yuan per mu over 1 kilogram, which greatly increases the enthusiasm of migrant workers in planting and realizes the goal of "win-win" for enterprises and migrant workers." Yu Yongsheng said.
“This land in my house was packaged and re-consigned. It not only obtained rent, but also received labor wages. My monthly salary income was more than 3,000 yuan. Nonglong Development Co., Ltd. gave us these elderly people and left-behind women a good job. The platform, although not working outside, is better than working outside to earn money.†Liao Daicui, a villager in the second group of Daxu Village in Zhuxi Town, said to me happily.