CN210924000U

CN210924000U - Double-cylinder rain gauge

Info

Publication number: CN210924000U
Application number: CN201922197902.XU
Authority: CN
Inventors: 刘文秀; 李媛; 白宇; 郭瑞; 唐邈; 郑乃源
Original assignee: Tianjin Eco Environmental Monitoring Center
Current assignee: Tianjin Eco Environmental Monitoring Center
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-07-03
Anticipated expiration: 2029-12-10

Abstract

The utility model relates to a binocular rain gauge, including the barrel, its characterized in that, the barrel be the urceolus, be provided with the inner tube in the urceolus, the height that highly is less than the urceolus of inner tube is provided with the funnel at the top of urceolus, the export of funnel is located the top of inner tube. The utility model discloses need not too high container just can accomplish the comparatively accurate measurement to the rainfall.

Description

Double-cylinder rain gauge

Technical Field

The design is suitable for the double-barrel rain gauge for light rain and extra-large heavy rain.

Background

According to the requirements of the environmental protection industry standard HJ/T165-2004 acid precipitation monitoring technical Specification of the people's republic of China, rainfall (snow) quantity observation (the rainfall (snow) quantity observation is also applicable to the snowfall, and for convenience of explanation, the rainfall is simply referred to as the rainfall quantity in the following) is carried out while the rainfall (snow) is collected, so that the quantity of the collected sample is calculated.

The rain gauge is arranged on a fixed frame beside the sampler, the distance from the rain gauge to the sampler is not less than 2m, the opening of the sampler is kept horizontal, and the height from the opening of the sampler to the ground is 70 cm. In winter, a higher backup rack is required to be arranged in a region with deep snow, and when the snow depth exceeds 30cm, the rain gauge is moved to the backup rack for observation.

The China weather service stipulates: the rainfall in 24 hours is called as the daily rainfall, and all the days are called as the light rain in 10 mm, the 10.0-24.9 mm is the medium rain, the 25.0-49.9 mm is the heavy rain, the rainstorm is 50.0-99.9 mm, the heavy rainstorm is 100.0-250.0 mm, and the rainstorm exceeding 250.0 mm is called as the extra heavy rainstorm; in the Yanan area of Shanxi with less rain, the rainstorm is called as the rainstorm when the daily rainfall reaches more than 30 mm.

The depth of the water layer accumulated on the water surface without evaporation, penetration and loss of rainwater falling from the sky to the ground is called rainfall (in millimeters), and the rainfall can be visually represented.

A standard rain gauge should be a cylindrical container, with the rain gauge, regardless of diameter, being marked upwards in millimeters as the smallest unit from the lowest plane inside the container. The rainfall measured by the rain gauges with different diameters is the same for the same place and the same rain.

At present, most of the single-tube rain gauges are used, and the defect is that only the rainfall of light rain can be collected, and in the case of heavy rain, the rainfall of 250.0 mm needs to be collected, so that a high rain gauge needs to be prepared, and the storage and the use are inconvenient.

One of the automatic rain gauges is an automatic rain gauge, which has advantages, but has a disadvantage that the automatic rain gauge misses the collection of rain samples and rain amount once the automatic rain gauge fails or is in power failure.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present design is intended to combine the characteristics of rainfall (design on a scale from light rain to heavy storm) to allow a small volume to function as a large volume. The rainfall meter is designed to be wider in rainfall collecting range and more convenient to operate, the rainfall amount of the extremely heavy rainstorm (larger than 250mm) can be collected to the maximum extent, and the rainfall can be accurately measured without using a container too high. The technical scheme is as follows:

a double-barrel rain gauge comprises a barrel body and is characterized in that the barrel body is an outer barrel, an inner barrel is arranged in the outer barrel, the height of the inner barrel is smaller than that of the outer barrel, a funnel is arranged at the top of the outer barrel, and an outlet of the funnel is located above the inner barrel.

Preferably, the inner cylinder is a transparent body, and scales are arranged on the side surface of the inner cylinder.

The sectional area of the outer cylinder is 5-20 times of that of the inner cylinder.

The top of the inner cylinder is provided with a gap.

The design aims at the characteristics of collecting the rainfall of small rain and even extra-large heavy rain to the maximum extent and has the following advantages:

(1) the outer shell is made of transparent plastic from the material selection, and the transparent plastic is selected because the water level scales can be clearly seen.

(2) The rain gauge is simple in structure and mainly comprises an outer cylinder A, an inner cylinder B and a funnel C;

(3) in terms of cost, all parts of the rain gauge are made of universal materials, any complex processing is not needed, and the cost is low;

(4) the rain gauge has small volume, light weight and convenient carrying, can be directly placed on a frame on site, and reduces the working difficulty;

(5) the range is large, and the rainfall from light rain to extra-large heavy rain can be collected by using the device.

Drawings

FIG. 1 is a schematic view of the inner barrel of a double-barrel rain (snow) gauge

FIG. 2 is a schematic view of the outer tube of a double-tube rain (snow) gauge

FIG. 3 is a schematic view of a dual-tube rain (snow) gauge funnel

FIG. 4 is a cross-sectional view of a dual-tube rain (snow) gauge

The reference numbers in the figures illustrate: 1. an inner barrel; 2. an outer cylinder; 3. a funnel; 4. a baffle plate; 5. a baffle ring; 6. opening the gap; 7. calibration; 8. water outlet of funnel

Detailed Description

The invention is described below with reference to the accompanying drawings and examples.

The inner cylinder 1, the outer cylinder 2 and the funnel 3 are arranged together to form a complete double-cylinder rain and snow gauge.

The double-cylinder rain and snow gauge comprises an inner cylinder 1, an outer cylinder 2 and a funnel 3, wherein the outer cylinder 2, the funnel 3 and a baffle 4 on the funnel play a role in fixing the inner cylinder

The inner diameter of the outer cylinder 2 is R, and the inner bottom is provided with a baffle ring 5 which is slightly larger than the outer diameter of the inner cylinder 1 and plays a role of positioning the lower end of the inner cylinder 1; the outer cylinder 2 is slightly higher than the inner cylinder 1.

The inner cylinder 1 is a cylinder with the radius of r, the scale 7 is carved on the cylinder body, the upper end of the cylinder body is provided with an opening 6, the opening 6 is used for enabling rainwater to flow into the funnel and flow into the inner cylinder 1 through the funnel water outlet 8, the inner cylinder 1 can be filled when the rainfall is large, the overflowing rainwater flows into the outer cylinder 2, the opening is the most critical link, and in order to facilitate easy reading of the rainfall flowing into the outer cylinder, a rain gauge with 10-time inner cylinder scale reading is needed to be designed for the rainfall flowing into the outer cylinder 2 (the design takes 10-time reading as an example, and can be designed to be 5 times, 10 times and 15 times according to the local rainfall condition).

According to the formula, the following is calculated:

setting: v_{Outer cover}＝πR²h；V_{Inner part}＝πr²h；V_{Outer cover}-V_{Inner part}＝10V_{Inner part}；

πR²h-πr²h＝10πr²h

πR²h＝11πr²h

R²＝11r²

Therefore, it is

When raining, directly reading the scales of the inner barrel; when heavy rain occurs, the inner cylinder is full of rainwater, and much rainwater overflows into the outer cylinder, namely the sum of the full scale reading of the inner cylinder and the 10-time reading of the outer cylinder (the outer cylinder and the inner cylinder share the same scale), namely the total rainfall is the sum of the full-scale inner cylinder scale and the scale overflowing into the outer cylinder.

So that when making a rain gauge, the diameter of the outer cylinder (2) is adjusted

The proportional design of the device can realize the effect of reading large capacity with small volume.

Claims

1. A double-barrel rain gauge comprises a barrel body and is characterized in that the barrel body is an outer barrel, an inner barrel is arranged in the outer barrel, the height of the inner barrel is smaller than that of the outer barrel, a funnel is arranged at the top of the outer barrel, and an outlet of the funnel is located above the inner barrel.

2. The rain gauge according to claim 1, wherein the inner cylinder is a transparent body, and scales are provided on a side surface of the inner cylinder.

3. A rain gauge according to claim 1, wherein the cross-sectional area of the outer barrel is 5 to 20 times the cross-sectional area of the inner barrel.

4. A rain gauge according to claim 1, wherein a notch is provided in the top of the inner barrel.