CN201556340U - A mobile adjustable rainfall simulator - Google Patents

Abstract

A mobile adjustable rainfall simulator belongs to the fields of environmental chemistry and water and soil conservation. The mobile adjustable rainfall simulator of the utility model is composed of a mobile test frame, a sieve type rainfall generator, a variable slope soil storage tank, an acid-resistant water tank, and a high-pressure water pump. The acid-resistant water tank is fixed on the mobile test frame. The water pipeline, high-pressure water pump, flow meter, and regulating valve are connected to the sieve-type rainfall generator, and the bottom of the water tank is provided with a drain; the sieve-type rainfall generator is assembled by a nozzle, a multi-layer screen, and a side rail slide; The slope soil storage tank is placed directly below the sieve-type rainfall generator, supported by fixed bearing brackets, adjustable brackets and fixed valves, and has grooved water intake holes and overflow tanks. Compared with other existing devices, the utility model combines the characteristics of a large-scale simulation device and a simple simulation device, and has the advantages of low cost, relatively simple structure, flexible movement, and good controllability of physical and chemical parameters of soil-water interface pollution.

Description

A mobile adjustable rainfall simulator

technical field

The utility model belongs to the fields of environmental chemistry and water and soil conservation, and relates to a mobile soil-water interface pollution flow simulation device.

technical background

Pollution flow at the soil-water interface refers to the water flow containing various pollutants and sediment formed by the surface runoff process of polluted soil under the action of precipitation or snowmelt, including the water carried by the receiving water body during this process. A special kind of "sewage" of dissolved or solid pollutants, and polluted water bodies such as rivers, lakes, reservoirs, ponds and bays that are in a turbid state and contain a series of soil-water microscopic interfaces under the disturbance of other factors. Among them, rainstorm runoff is the main driving force of soil-water interface pollution, soil-water loss is the main form and carrier of soil-water interface pollution, and soil-water interface is the key interface of pollution.

At present, the simulated rainfall devices are mainly used at home and abroad to conduct related research by measuring the rainfall intensity, raindrop size and other parameters, and coordinating with the simulated surface soil erosion, runoff flow, and the types and contents of pollutants in the runoff. However, the currently commonly used rainfall simulation devices are generally oversimplified or overly complicated. The former often uses a method similar to "drip irrigation" to simulate rainfall. Due to insufficient height, the simulation effect deviates greatly from the actual situation, and the control of rainfall conditions is insufficient; The latter is usually bulky, inconvenient to assemble and disassemble, complex in structure, and high in cost. Therefore, there is no soil-water interface pollution flow simulation device that can be widely used in research.

Contents of the invention

The purpose of the utility model is to provide a soil-water interface pollution flow simulation device with simple structure, convenient installation and use, flexible movement, easy control of rainfall conditions and low cost.

In the mobile adjustable rainfall simulator of the utility model, the acid-resistant water tank is sequentially connected with a high-pressure water pump, a regulating valve, a flow meter, and a sieve-type rainfall generator through a water delivery pipeline, and a drain port is provided at the bottom of the acid-resistant water tank; the acid-resistant water tank is fixed on the bottom plate There are pulleys on the top and under the bottom plate; the sieve-type rainfall generator is assembled from sprinklers, multi-layer screens, and side rail slides; The adjustable bracket and the fixed valve support have grooved water intake holes and overflow tanks.

Change the multi-layer screen with different apertures to control the size of raindrops and the uniform distribution of rainfall.

The slope of the soil storage tank is adjusted through a fixed valve, a fixed bearing bracket and an adjustable bracket.

The mobile test stand has anti-skid brakes.

The soil-water interface pollution flow simulation device of the utility model mainly includes two parts: a rainfall simulation device and a ground surface simulation device. The rainfall simulation device transmits the simulated rainwater prepared in the acid-resistant water tank to the sieve-type rainfall generator through a high-pressure water pump, uses flow meters and regulating valves to control the rainfall, and uses multi-layer screens to control the size of raindrops and the uniformity of rainfall.

The surface simulation device uses a variable slope soil storage tank, fills the test soil into the tank, and simulates the surface with different slopes by adjusting the slope. There is a round hole at the bottom of the soil tank to collect seepage.

Compared with other existing devices, the utility model combines the characteristics of a large-scale simulation device and a simple simulation device, and has the advantages of low cost, relatively simple structure, flexible movement, and good controllability of physical and chemical parameters of soil-water interface pollution.

This experiment realizes the semi-automatic control of the whole process of simulated rainwater preparation, simulated rainfall condition control, generation and collection of soil-water interface pollution flow, which facilitates the simulation of soil-water interface pollution process in a small space, and the simulation effect is in line with the actual effect Higher degree. This new type of experiment is low in cost, easy to install and disassemble, and has a large range of simulation conditions, so it has high promotion and application value.

Description of drawings

Fig. 1 Schematic diagram of the mobile soil-water interface pollution flow simulation device.

Figure 2 Schematic diagram of the structure of the soil storage tank.

Figure 3 Schematic diagram of the structure of the sieve-type rainfall device

Detailed ways

In the mobile adjustable rainfall simulator of the present utility model, the acid-resistant water tank (1) is sequentially connected with the high-pressure water pump (2), the regulating valve (3), the flow meter (6), and the sieve-type rainfall generator through the water delivery pipeline (4). connection, the bottom of the acid-resistant water tank is provided with a drain (17); the acid-resistant water tank is fixed on the base plate (18), and a pulley (15) is arranged under the base plate; The side rail slideway (9) is assembled; the variable slope soil storage tank is placed directly below the sieve-type rainfall generator, supported by a fixed bearing bracket (11), an adjustable bracket (10) and a fixed valve (12). Groove water intake hole (14) and overflow tank (13) are arranged. The mobile test frame has an anti-skid brake (16).

The utility model is realized in the following way: the simulated rainwater for experiment is injected into the acid-resistant water tank (1), the high-pressure water pump (2) is turned on, and when the regulating valve (3) is opened, the simulated rainwater is transmitted to the nozzle along the pipeline (4) of the mobile test frame (5), the flow meter (6) shows the instant flow of simulated rainwater. The multi-layer screen (7) is located directly below the adjustable shower, and the simulated rainwater falls on the multi-layer screen after spraying from the micro-hole nozzle of the adjustable shower. The rainwater is evenly divided into raindrops with uniform diameter by the meshes of the screen, and then falls into the variable slope soil storage tank (8). By changing the screens with different apertures through the side rail slideway (9), the diameter of the raindrops can be adjusted accordingly, and the falling speed of the raindrops can be adjusted by adjusting the height of the screens.

Adjust the regulating valve (3) multiple times and replace the porous screen (7) with different apertures, measure the diameter of the raindrop and the landing speed, and obtain the empirical relationship between the diameter of the raindrop, the landing speed and the flow rate, and the type of the screen, as a reference for controlling the rainfall parameters during the experiment control conditions.

Lift the adjustable support (10) to the required angle of the experiment, tighten the fixed valve (12) between the fixed bearing support (11), and the slope angle of the soil tank is fixed. The slope angle range of the soil tank is 0-40°, which can meet the slope range of common ground. Fill the soil to be tested into the soil tank and place it directly under the sieve-type rainfall generator. The simulated rainwater falls into the soil tank, and the raindrops hit the soil surface. As the rainfall increases, the soil surface gradually forms a water flow, and the water flow simulates the soil-water interface pollution flow. The polluted flow flows down along the slope of the soil tank, and flows out along the overflow tank (13) of the extension part of the soil tank, and a sampling bottle is placed directly below the overflow tank to collect samples. Seepage will occur after surface soil moisture is saturated, and seepage seeps through the water intake hole (14) of the groove bottom groove, and a sampling bottle is placed directly under the groove water intake hole to collect the seepage.

When preparing simulated rainwater, the pulley (15) can be used to move the device to the water source, and the anti-skid gate (16) can be fixed to prevent the casing from moving due to external force. Determine the volume of rainwater according to the scale on the acid-resistant water tank. After the experiment, open the water tank bottom outlet (17) to discharge the remaining rainwater, and rinse the water tank.

Claims (2)

1. A mobile adjustable rainfall simulator is characterized in that the acid-resistant water tank is connected with a high-pressure water pump, a regulating valve, a flow meter, and a sieve-type rainfall generator successively through a water delivery pipeline, and the bottom of the acid-resistant water tank is provided with a drain; The water tank is fixed on the bottom plate, and there are pulleys under the bottom plate; the sieve-type rainfall generator is assembled from a nozzle, a multi-layer screen, and a side rail slide; the variable slope soil storage tank is placed directly under the sieve-type rainfall generator, and is fixed by a Bearing bracket, adjustable bracket and fixed valve support, there are grooved water intake holes and overflow tanks. 2. The mobile adjustable rainfall simulator according to claim 1, characterized in that the mobile test stand has an anti-skid gate.

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