CN200982975Y - Sampling device for automatic monitoring device of farm or sloping field surface flow - Google Patents

Abstract

The sampling device used for the automatic monitoring device of farmland or sloping runoff water, including a tipping bucket, is characterized in that it also includes: a sample holding turntable, on the surface of which is provided with test tube insertion holes distributed in a spiral shape, and the test tubes are inserted into the insertion holes Its end is slightly higher than the surface of the sample holding turntable; the driving device is used to drive the sample holding turntable to rotate in one direction; the sampler measures a certain volume of runoff water at the moment of rotation of the tipping bucket and passes it Runoff water is transported into the test tube; the guide arm can move up and down in the vertical direction, and a baffle is provided at one end of the guide arm. When the guide arm is in the falling position, it can be hooked on the end of the test tube protruding from the sample turntable and the above-mentioned The water outlet of the hose is positioned above the test tube. When the guide arm is in the raised position, the baffle leaves the end of the test tube, and the sample-containing turntable is driven by elastic force to rotate; the turntable switch, through the eccentric wheel and the It is connected with the rotating shaft of the above-mentioned dumping bucket, and the guide arm is quickly lifted when the dumping bucket is turning.

Description

Sampling device for automatic monitoring device for farmland or sloping runoff water

technical field

The utility model relates to a sampling device for farmland or sloping runoff water, in particular to a sampling device for an automatic monitoring device for farmland or sloping runoff water.

Background technique

Soil erosion, non-point source pollution, nutrient loss in agricultural and forestry land, and migration of pollutants and nutrients in the soil are serious problems facing my country's ecology, environment, and agriculture and forestry. Runoff is the initiator and main carrier of these processes. Therefore, people attach great importance to the research and monitoring of runoff. Since 1994 in my country alone, 7087 academic papers related to runoff have been published in various natural science journals (through the "Chinese Journal Full-text Database (CJFD )", including more than 600 papers on farmland and slope runoff, and more than 330 papers on underground runoff and soil inflow. , water and soil conservation, hydrology, geology and other disciplines. It can be seen that the study of runoff is very important.

The primary basis for the study of runoff is accurate measurement of runoff, and the measurement technology for river runoff, which has pressure, high head, large flow, and continuous runoff, has been very mature. However, for non-pressure, low head, small flow, and intermittent runoff such as farmland runoff, slope runoff, and soil seepage flow, the sump method is basically used at present, that is, a runoff pool is built at the runoff outlet (some with diverters), collect the runoff water in the sump, and then count the water in the sump. The pool method has obvious disadvantages: 1) It can only measure the total amount of runoff, but cannot observe the process of runoff, that is, the relationship curve between cumulative runoff, instantaneous runoff velocity and time; 2) It cannot automatically collect runoff water samples, It is also impossible to analyze the runoff dynamics of nutrients, pesticides, sediment and other substances in runoff water, that is, the relationship curve between cumulative loss, instantaneous loss speed and time, and can only analyze the final total loss of these substances; 3) runoff When it is large, it is easy to overflow, and when the groundwater level is high, it is easy to cause groundwater infiltration, and the pond cannot get rid of these infiltration errors; 4) The influence of evaporation cannot be eliminated. The basic principle of the pool method is to accumulate the runoff water and then measure it at one time. However, as long as there is water in the pool, the evaporation of the water surface will occur. During the gradual accumulation of runoff water, the evaporation of the water surface will also gradually accumulate. . In particular, due to the strong randomness of the runoff, after the runoff occurs (especially at night), it is often difficult to measure the water volume of the pond in time, and the evaporation error of the water surface will be larger; 5) the pond It is a fixed facility with poor mobility and it is difficult to realize multi-point monitoring. In the past two years, there have been 3 to 4 academic articles discussing that the tipping bucket can be used to accurately measure no pressure, low head, small flow, and intermittent runoff. Chengdu Songtao Digital Technology has developed the CR2-L double tipping bucket flowmeter (currently only Prototype), can more accurately measure no pressure, low head, small flow, intermittent runoff within the range of 0.2mm to 35mm, and can analyze the runoff process, but because the runoff water samples cannot be collected automatically during the monitoring process, it is still impossible to analyze nutrients , pesticides, pollutants, sediment and other runoff water inclusions in the runoff process.

Utility model content

The purpose of this utility model is to provide a sampling device for the automatic monitoring device of farmland or sloping runoff water. The device can continuously and automatically sample the runoff water by using gravity and spring force, so as to realize the detection of nutrients, pesticides and pollutants. Analysis of the runoff process of runoff water inclusions such as , sediment and so on.

The sampling device of the utility model for the automatic monitoring device of farmland or sloping land runoff includes a tipping bucket, and is characterized in that it also includes: a sample holding turntable, a test tube insertion hole is arranged on the surface of the sample holding turntable, and the test tube is inserted into the test tube insertion hole. The top of the hole is slightly higher than the surface of the sample holding turntable; the driving device is used to drive the sample holding turntable to rotate in one direction; the sampler measures the sample when the tipping bucket rotates and pours water. A certain volume of runoff water is connected to a hose at the bottom of the sampler, and the other end of the hose is fixed at the positioning end of the guide arm described later for delivering the runoff water to the test tube pointed by the guide arm; the guide Arm, the guide arm can move up and down in the vertical direction, one end of the guide arm is provided with a baffle plate, the baffle plate can be hooked on the end of the above-mentioned test tube protruding from the sample carousel when the guide arm is in the dropped position, and the above-mentioned The water outlet of the hose is positioned above the test tube. When the guide arm is in the raised position, the baffle just lets go of the end of the test tube, and the sample holding turntable is driven by the driving device to rotate; the turntable switch , the turntable switch is connected with the rotating shaft of the dump bucket through an eccentric wheel, and the guide arm is quickly lifted when the dump bucket rotates.

The sampling device of the utility model for automatic monitoring of farmland or sloping runoff water is characterized in that the driving device is arranged at the center of the sample holding turntable, and the driving device is a spring.

The utility model of the sampling device used for the automatic monitoring device of farmland or sloping runoff water is characterized in that the test tube insertion holes on the sample holding turntable are distributed in a spiral shape.

The sampling device of the utility model for the automatic monitoring device of farmland or sloping runoff water is characterized in that the baffle is an L-shaped baffle.

The sampling device of the utility model for the automatic monitoring device of farmland or sloping runoff water is characterized in that the rotary switch is a lever structure.

The sampling device used in the automatic monitoring device for runoff water in farmland or sloping land of the utility model can continuously and automatically sample the runoff water by using gravity and spring force, so as to realize the detection of nutrients, pesticides, pollutants, sediment and other runoff water. Analysis of the runoff process of matter.

Description of drawings

Fig. 1 is a structural schematic diagram of a sampling device used in an automatic monitoring device for farmland or sloping runoff water of the present utility model.

Fig. 2 is a distribution diagram of the test tube insertion holes on the sample holding turntable of the sampling device used in the automatic monitoring device for farmland or sloping runoff water of the utility model.

Detailed ways

The specific implementation of the sampling device used in the automatic monitoring device for farmland or sloping runoff water of the present utility model will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a structural schematic diagram of the sampling device used for farmland or slope runoff automatic monitoring device of the present invention, and Fig. 2 is a sampling device for farmland or slope runoff automatic monitoring device of the present utility model on the sample turntable Distribution map of test tube jacks. In the figure, 1 is a sample carousel, on the surface of the sample carousel there are test tube jacks 11 distributed in a spiral shape, and when a test tube is inserted into the test tube jack, its top is slightly higher than the surface of the sample carousel 1; 8 is a drive device, the driving device 8 is fixed on the central position of the sample-carrying turntable, and is used to drive the sample-holding turntable to rotate along the above-mentioned spiral direction; 3 is a sampler, and the sampler 3 measures the sample when the tipping bucket rotates and pours water. A certain volume of runoff water is connected to a hose 10 at the bottom of the sampler, and the other end of the hose 10 is fixed on the positioning end of the guide arm 2, so as to transport the runoff water to the test tube pointed to by the positioning end; 2 It is a guide arm, the guide arm 2 can move up and down in the vertical direction, the positioning end of the guide arm 2 is provided with a baffle plate, and the baffle plate can be hooked on the above-mentioned test tube protruding from the sample holding turntable 1 when the guide arm is in a dropped position. and position the water outlet of the hose 10 above the test tube. When the guide arm is in the raised position, the baffle just lets go of the end of the test tube, and the sample carousel 1 rotates a sample Units; 5, 6, and 9 together form a turntable switch, the turntable switch is connected with the rotating shaft 4 of the dump bucket through the eccentric wheel 7, and the guide arm is quickly lifted when the dump bucket rotates. Under the action, it quickly falls back, and the L-shaped baffle at the positioning end of the guide arm quickly hooks the next test tube located in the test tube socket in a spiral distribution, and the sample rotating disk stops rotating until the next tipping bucket is turned over.

In this embodiment, the driving device 8 adopts a spring, but the utility model is not limited thereto, and other devices can also be used instead.

In this embodiment, the turntable switch adopts a lever structure, but the utility model is not limited thereto, and any device that can make the turntable rotate a unit is included in the protection scope of the utility model.

The sampling device used in the automatic monitoring device for runoff water in farmland or sloping land of the utility model can continuously and automatically sample the runoff water by using gravity and spring force, so as to realize the detection of nutrients, pesticides, pollutants, sediment and other runoff water. Analysis of the runoff process of matter.

Claims (5)

1. The sampling device used for automatic monitoring of farmland or sloping runoff water, including a tipping bucket, is characterized in that it also includes: a sample holding turntable, a test tube insertion hole is arranged on the surface of the sample holding turntable, and the test tube is inserted into the test tube insertion hole At the same time, its end is slightly higher than the surface of the sample holding turntable; the driving device is used to drive the sample holding turntable to rotate in one direction; A certain volume of runoff water is connected to a hose at the bottom of the sampler, and the other end of the hose is fixed at the positioning end of the guide arm described later for delivering the runoff water to the test tube pointed by the guide arm; the guide arm, the guide arm can move up and down in the vertical direction, one end of the guide arm is provided with a baffle plate, the baffle plate can be hooked on the end of the test tube protruding from the sample carousel when the guide arm is in the dropped position and The water outlet of the hose is positioned above the test tube. When the guide arm is in the raised position, the baffle leaves the end of the test tube, and the sample holding turntable is driven by the driving device to rotate; the turntable switch, the turntable switch is connected with the rotating shaft of the dump bucket through an eccentric wheel, and the guide arm is lifted rapidly at the moment the dump bucket rotates. 2. The sampling device for automatic monitoring of runoff water in farmland or sloping land according to claim 1, wherein the driving device is arranged at the center of the sample holding turntable, and the driving device is a spring. 3. The sampling device for automatic monitoring of runoff water in farmland or sloping land according to claim 1, characterized in that the test tube insertion holes on the sample holding turntable are arranged in a spiral shape. 4. The sampling device for automatic monitoring of runoff water in farmland or sloping land according to claim 1, wherein the baffle is an L-shaped baffle. 5. The sampling device for automatic monitoring of runoff water in farmland or sloping land according to claim 1, characterized in that the rotary switch is a lever structure.

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