Miniature rainfall monitoring device

Abstract

The miniature rainfall monitoring device comprises a threaded base, the threaded base is sleeved with a shell, the top of the shell is open, an inverted conical rain receiving opening is formed in the top of the shell, a positively-arranged conical filter screen is installed in the rain receiving opening, and the filter screen is connected with the threaded base. The conical tip of the bottom of the rain receiving opening is opened and connected with a drainage nozzle in a sealed mode, the drainage nozzle is in a step shape with the inner diameter decreasing in sequence, the bottom of the drainage nozzle is connected with a liquid dropping head, a fixing base is installed on the surface of the threaded base in the shell, and a step is arranged on the top face of the fixing base. An elastic piece which is inclined downwards is clamped to the top of the fixed base, a counter is installed at the position, corresponding to the end portion of the lower end of the elastic piece, of the step, and the lower end of the elastic piece is close to a counting trigger portion at the top of the counter. The small-particle rainfall sensor is suitable for small-particle rainfall, is small in size, can be conveniently matched with existing micro meteorological equipment for use, and can accurately monitor the rainfall capacity of the small-particle rainfall.

Description

Technical Field

[0001] The utility model belongs to the technical field of meteorological monitoring, and in particular relates to a micro rainfall monitoring device. Background Art

[0002] Precipitation is a key indicator for measuring precipitation in a certain period of time. It is expressed as the depth of the water layer formed by precipitation on the ground, excluding water that evaporates, infiltrates or is lost. Precipitation is closely related to a variety of meteorological factors, and its accurate measurement is crucial for meteorological research and related applications. With the development of science and technology, six-element micro-intelligent weather stations have been widely used in meteorological monitoring. However, the existing micro-intelligent meteorological monitoring equipment on the market mainly uses piezoelectric rain sensors or external traditional rain gauges to measure rainfall, both of which have significant limitations. Piezoelectric rain sensors can only measure rainfall with large particles, but cannot measure rainfall with small particles, such as drizzle or continuous light rain. The external traditional rain gauge is not only inconvenient to install due to its large size, but also contrary to the compact design principle pursued by the micro-intelligent weather station. Therefore, we propose a micro-rainfall monitoring device for measuring small-particle rainfall. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a miniature rainfall monitoring device for the above-mentioned deficiencies of the prior art, which can be used to measure the rainfall of small-particle rainfall and has a small size and accurate monitoring data.

[0004] The technical solution adopted by the utility model is: a miniature rainfall monitoring device, including a threaded base, a shell body which is sealed and matched with the threaded base is mounted on the threaded base, the top of the shell is open, and an inverted conical rain receiving port is installed on the top of the shell, a right-set conical filter screen is installed in the rain receiving port, the bottom of the filter screen is fixedly connected to the inner walls around the rain receiving port, the cone tip at the bottom of the rain receiving port is open and sealed with a drainage nozzle, the drainage nozzle is in a stepped shape with the inner diameter decreasing successively, and a drip head is connected to the bottom of the drainage nozzle, a fixed base is installed on the surface of the threaded base in the shell, the top surface of the fixed base is provided with a step, a spring piece arranged to be inclined downward is clamped on the top of the fixed base, a counter is installed on the step at a position corresponding to the lower end of the spring piece, and the lower end of the spring piece is close to the counting trigger part at the top of the counter.

[0005] Preferably, a guide plate is installed on a side of the fixed base close to the counter, and a drainage port is opened on the side wall of the shell at the lower end of the guide plate.

[0006] Preferably, the outer wall of the threaded base is threaded for connection with the top of the micro-meteorological device.

[0007] The beneficial effects of the utility model are:

[0008] (1) The rain receiving port and the filter screen are two cones in opposite directions. When the filter screen filters foreign matter into the housing, the foreign matter will slide down along the outer wall of the filter screen due to gravity, so that foreign matter such as leaves will not completely cover the filter screen, avoiding obstruction of rainwater from entering the rain receiving port;

[0009] (2) A stepped drainage nozzle is provided, and as the inner diameter of the drainage nozzle decreases, the rainwater in the drainage nozzle fills the lower part of the drainage nozzle. In combination with a dripping pipe, the rainwater collected by the rain receiving port can drip from the nozzle of the dripping pipe in the form of drops of the same size and volume;

[0010] (3) By providing a spring sheet and a counter coordinated with the spring sheet, the spring sheet is bent under the weight and kinetic energy of the water droplet itself, and the end of the bent spring sheet contacts the counting trigger part of the counter, so that the counter automatically records the number of contacts with the spring sheet. According to the volume of each drop of rainwater and the number of contacts, the rainfall amount can be accurately calculated;

[0011] (4) A guide plate is provided next to the counter so that water droplets after impacting the shrapnel can splash toward one side of the guide plate and slide down the guide plate to the drain outlet for discharge.

[0012] The utility model is suitable for small-particle rainfall, has a small volume, is convenient for use with existing micro-meteorological equipment, and can accurately monitor the rainfall amount of small-particle rainfall. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] In the figure: 1. threaded base; 2. shell; 3. rain receiving port; 4. filter screen; 5. drainage nozzle; 6. drip head; 7. fixed base; 8. spring; 9. counter; 10. guide plate; 11. drain outlet. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Example

[0017] like Figure 1As shown, the micro rainfall monitoring device provided in this embodiment includes a threaded base 1, the lower outer wall of the threaded base 1 is threaded for connecting with the top of the micro meteorological device; the threaded base 1 is mounted with a shell 2 that is sealed with it, the top of the shell 2 is open, and an inverted conical rain receiving port 3 is installed on the top of the shell 2, and a positive conical filter screen 4 is installed in the rain receiving port 3, and the bottom of the filter screen 4 is fixedly connected to the inner wall of the rain receiving port 3, and the bottom cone tip of the rain receiving port 3 is opened and sealed with a drainage nozzle 5, and the drainage nozzle 5 is in a stepped shape with the inner diameter decreasing successively, and a drip head 6 is connected to the bottom of the drainage nozzle 5, a fixed base 7 is installed on the surface of the internal thread base 1 of the shell 2, the top surface of the fixed base 7 is provided with a step, and a spring piece 8 arranged to be inclined downward is clamped on the top of the fixed base 7, a counter 9 is installed on the step at a position corresponding to the lower end of the spring piece 8, and the lower end of the spring piece 8 is close to the counting trigger part at the top of the counter 9; a guide plate 10 is installed on the side of the fixed base 7 close to the counter 9, and a drainage port 11 is opened on the side wall of the shell 2 at the lower end of the guide plate 10.

[0018] When in use, the threaded base 1 is connected to the top of the micro-meteorological equipment through the threaded bottom of the threaded base 1, and small particles of rainwater are collected by the rain receiving port 3 and enter the drainage pipe along the rain receiving port 3. At the same time, debris and foreign matter are blocked by the filter screen 4. The rainwater entering the drainage pipe, since the drainage pipe adopts a stepped structure with an inner diameter decreasing from top to bottom, the rainwater that continuously enters the drainage pipe will fill the drainage pipe at the bottom of the drainage pipe and then flow into the dripping pipe. When the bottom of the drainage pipe is filled, the size and volume of each drop of rainwater dripping from the mouth of the dripping pipe are the same. The gravity and kinetic energy of each drop of rainwater falling make the raindrop contact with the end of the shrapnel 8, forming an impact on the end of the shrapnel 8, so that the end of the shrapnel 8 bends and contacts the counting trigger part on the top of the counter 9, triggering the counter 9 to count, and then the splashed rainwater drops on the guide plate 10 and slides to the drain outlet 11 with the guide plate 10 for discharge.

[0019] Metering principle: Rainwater in the rain receiving port 3 passes through the filter tip to filter out debris and then enters the drainage nozzle 5. The drainage nozzle 5 and the drip tube can control the rainwater into 0.2 ml droplets. When the water droplets fall due to their own gravity and contact the spring 8, the spring 8 is bent by the weight and momentum of the water droplets. The bent spring 8 immediately contacts the counter 9, immediately triggering the electrical signal of the counter 9 for counting. After the water droplets are scattered, the spring 8 automatically separates from the counter 9 by its own elastic recovery characteristics. By multiplying the fixed volume of each droplet by the number of times of the counter 9, the volume of the falling rainwater can be accurately calculated.

[0020] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. A micro rainfall monitoring device, characterized in that: The invention comprises a threaded base (1), on which a shell (2) which is sealed and matched therewith is mounted, the top of the shell (2) is open, and an inverted conical rain receiving port (3) is mounted on the top of the shell (2), a positive conical filter screen (4) is mounted in the rain receiving port (3), the bottom of the filter screen (4) is fixedly connected to the inner wall around the rain receiving port (3), the bottom cone tip of the rain receiving port (3) is open and sealedly connected to a drainage nozzle (5), the drainage nozzle (5) is in a stepped shape with its inner diameter decreasing successively, and the bottom of the drainage nozzle (5) is connected to a drip head (6), a fixed base (7) is mounted on the surface of the threaded base (1) inside the shell (2), the top surface of the fixed base (7) is provided with a step, a downwardly inclined spring sheet (8) is clamped on the top of the fixed base (7), a counter (9) is mounted on the step at a position corresponding to the lower end of the spring sheet (8), and the lower end of the spring sheet (8) is close to the counting trigger part at the top of the counter (9).

2. A micro rainfall monitoring device according to claim 1, characterized in that: A guide plate (10) is installed on one side of the fixed base (7) close to the counter (9), and a drainage port (11) is provided on the side wall of the housing (2) at the lower end of the guide plate (10).

3. A micro rainfall monitoring device according to claim 1 or 2, characterized in that: The outer wall of the threaded base (1) is provided with threads for connecting with the top of the micro-meteorological equipment.

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