Magdeburg hemispheres

Madeberg Hemisphere - Customized Science Museum Exhibitions, Campus Community Science Popularization Equipment, Source Manufacturer of Science Exhibitions Description and Introduction of Scientific Principles:

Function Overview: The Magdeburg Hemisphere Experiment is an important discovery and famous experiment in the history of world science. This exhibit items reproduce the core content of the Magdeburg Hemisphere experiment, demonstrating the existence of atmospheric pressure and demonstrating that atmospheric pressure is very high and very powerful. In the experiment, we extracted air from both hemispheres to reduce the number of air particles inside the spheres. The atmosphere outside the sphere tightly compresses the two hemispheres together, making it difficult to separate. The more you withdraw, the greater the pressure. Exhibition items simulate the famous Marburg Hemisphere experiment through a simple experimental setup, allowing participants to understand the basic concept of negative pressure and further comprehend the existence of atmospheric pressure. The exhibition items feature two different sized hemispheres, each with an operation button and a pressure gauge next to the button. Participants operate the button to start the air pump to extract air from the inside of the hemisphere, and then hold the handle on the hemisphere and pull it hard, which feels quite laborious. This indicates that atmospheric pressure exists. The air inside the two hemispheres is pumped away by the air pump, reducing the number of air particles inside the sphere. The atmosphere outside the sphere will tightly press the two hemispheres together, making it difficult to separate. The more air is pumped out from the hemisphere, the greater the external pressure, and the more difficult it is for the two hemispheres to separate.

Main technical parameters of exhibits:

Specification: 1.5m * 1.2m * 0.85m 1. exhibits Material: ① Booth frame: 25 * 40 rectangular tube, 25 square tube, 40 square tube, enclosure 1.2mm cold-rolled plate, surface painted ② Tabletop: engineering plastic, thickness ≥ 15mm ③ Instruction board, graphic board: acrylic UV spray painting ④ Marburg hemisphere: 304 stainless steel 2. Main configuration: ① PLC control system: Mitsubishi/F × 2N-32MR output input form: relay output; Total number of inputs: 16 points; Total output: 16 points; Expansion: possible; Working power supply: DC 24V ② Switching power supply: Mingwei NES-35-24 input AC220V, output DC24V, power 35W ③ Leakage switch: DZ47LB-32 C16 poles: 2P+N; Release current: 16A; arc extinguishing medium: residual current circuit breaker; Breaking capacity: 6KA ④ buttons (6 pieces): GQ25-11E mounting hole size Φ 25; Working voltage 250V; Working current: 5A; Rated heating current: 10A; Mechanical lifespan: 1 million cycles; Head protection level: IP65; Protection method: Waterproof. ⑤ Solid state relays (6 pieces): SSR-4810 DA rated parameters 10A 250V INPUT: 3-32VDC OUTPUT: 24-480VAC ⑥ Electromagnetic valves (6 pieces): 2W030-08-B Yadeke ⑦ Vacuum gauge (1 piece): Z40 surface size 40mm Shanghai Yichuan Instrument Factory ⑧ Indicator lights (3 red, 3 green): HK12-R red light voltage: 24V opening size: 12mm rated current: 20mA ⑨ Vacuum station: LC-XD-020 power supply voltage 220V, with 20L air storage tank, vacuum pump can automatically stop after pumping to a certain vacuum degree 3. Energy requirements: AC220V 1000W (standard three wire socket)

Principle explanation and demonstration video: