翻斗式雨量计

Types of Rainfall Meters and Installation The rainfall falling from the sky to the ground, without evaporation, infiltration, loss and the depth of the water layer accumulated on the water surface, we call the rainfall (in millimeters), it can visually represent the amount of rainfall. The common instrument used to determine the amount of rainfall is the rain gauge, and there are three types of rain gauges. 1. Tipping bucket type rain gauge: divided into two parts: the sensor and the recorder, which are connected by cable. Sensor with a bucket measurement, it is the use of the middle partition between the two completely symmetrical triangular container, the middle partition can be rotated around the horizontal axis, so that both sides of the container in turn to receive water. When one side of the container is filled with a certain amount of rain (0.1 or 0.2 mm), due to the outward shift of the center of gravity and flip, the water will be poured out, as the rainfall continues, will make the bucket flip left and right, the contact switch will turn the bucket flip times into electrical signals, sent to the recorder, in the cumulative counter and self-recording clock to read out the precipitation information. 2. Siphon type rain gauge: the shape and size of the upper water funnel is the same as that of the rain gauge. When the rainwater through the funnel into the measuring cylinder, the float in the cylinder will rise with the water level and float up, driving the self-remembering pen to draw the curve of the rising water level on the self-remembering paper. When the water level in the rain barrel reaches 10 mm, the water is discharged quickly with the help of a siphon tube, and the pen tip falls back to the zero position to re-record. The self-recording clock gives the cumulative process of precipitation over time. 3. Weighing type rain gauge: The recording of rainfall is achieved by weighing the rain captured in the container. Tumbler type rain gauge installation method. Step1: the production of cement installation base, cement foundation on the plane should be horizontal state. The size of the cement installation base is generally 40cm x 40cm square base or 40cm diameter round base with a height of not less than 30cm. Require the height of the instrument's rain-bearing mouth from the ground plane distance of 70cm, and to ensure that the instrument mouth around 3 ~ 5 meters does not allow higher than the instrument rain-bearing mouth of the shade;. Step 2: Install and fix the instrument, adjust the level of the rain-bearing mouth, make 3 installation holes of φ12 depth 8~10cm on the cement foundation, place the expansion bolts in the installation holes, lock them with lock nuts, then install the instrument base on the 3 height-adjusting support nuts, adjust the height of the support nuts and measure whether the ring mouth is in the horizontal state with the level ruler, and fix the instrument with the upper lock. Step 3: Adjust the level of the tipping bucket bracket, remove the stainless steel outer cylinder, check and adjust the bubble of the horizontal bubble on the tipping bucket bracket whether it is in the middle position, in the middle position then the installation is successful. https://www.renkeer.com/rain-gauges-types/