CN107817135B

CN107817135B - Automatic sampling device for rainwater runoff

Info

Publication number: CN107817135B
Application number: CN201610818705.3A
Authority: CN
Inventors: 庞燕; 胡小贞; 项颂; 薛鹏程; 薛力强
Original assignee: Chinese Research Academy of Environmental Sciences
Current assignee: Chinese Research Academy of Environmental Sciences
Priority date: 2016-09-13
Filing date: 2016-09-13
Publication date: 2020-10-27
Anticipated expiration: 2036-09-13
Also published as: CN107817135A

Abstract

The invention discloses a device for automatically collecting and storing rainfall runoff, and relates to the field of environmental engineering and water supply and drainage engineering. The invention takes rainfall time as a trigger condition, and automatically controls the rainwater runoff generated in different periods to be collected and stored in an independent sampling bottle under the rainfall condition. The device consists of a rainwater sensor, a timer, a controller, a runoff collecting main pipe, a transmitter, a liquid level meter, a runoff collecting branch pipe, an electromagnetic valve and a sampling bottle. The invention has the characteristics of high automation degree, simple structure, convenient use and the like. Is suitable for use in: 1. collecting roof rainwater runoff formed by rainfall in any time period; 2. the change rule of the rainwater runoff quality along with the rainfall time is researched.

Description

Automatic sampling device for rainwater runoff

1 technical field

The invention relates to an automatic sampling device for rainwater runoff, and belongs to the field of environmental engineering and water supply and drainage engineering. The invention belongs to the field of in-situ ecological restoration of river water bodies, and particularly relates to novel carpet type artificial aquatic plants.

2 background of the invention

The pollution of the rainwater runoff is one of important components of non-point source pollution, and means that pollutants in the atmosphere, the ground and the soil diffusively enter surface water and underground water under the leaching and scouring action of the rainwater runoff to cause water environment pollution. Compared with other pollutions, the pollution source has randomness of pollution generation and uncertainty of pollutant discharge amount, attention of all countries in the world is paid more and more, and global environmental protection workers invest a large amount of manpower and material resources to carry out research on rainwater runoff pollution.

Sampling monitoring work of the rainwater runoff is performed for basic work of research, and the quality of the whole research work can be directly influenced if sampling of the rainwater runoff is accurate and timely. However, the uncertainty of rainwater causes difficulty in sampling work, and a sampler cannot arrive at the site in a short time, so that initial rainwater runoff cannot be collected; a large amount of manpower and material resources are consumed when people squat and keep for a long time; manual sampling can also be dangerous at night or in thunderstorms. More and more researchers have invented automatic sampling devices instead of manual sampling.

For example, the invention patent with the publication number of 102323109A discloses a road surface rainwater runoff sampling device, which adopts a tooth-shaped water inlet plate with a hydraulic optimization design to shunt the rainwater runoff on the road surface, so that the runoff water cross section is reduced to a half of that of a tooth-free water inlet plate, and the runoff sampling efficiency is obviously improved; the invention patent with the publication number of 102759461A is named as an automatic timing water sampling device, and utilizes a stepping motor to drive an axle tube and drive a water distribution disc to realize the timing collection of samples. Also, as disclosed in patent 104596800a, the name is a wheel-type surface runoff sampling device, which adopts the capillary phenomenon of tires and the rotating centrifugal force, and combines a flow guider and a numerical control collector to effectively collect surface runoff. The devices greatly improve the sampling efficiency, reduce the workload, but still do not leave manual operation in the sampling process, even if the automation degree of some devices is higher, the start of the devices still needs manual operation of a sampler, and the sampling device brings great problems to field sampling work which cannot predict rainfall time in time and has a long sampling distance.

Disclosure of the invention

The invention aims to provide an automatic rainwater runoff collecting device which is simple in structure and can be automatically controlled.

The invention provides an automatic rainwater runoff sampling device which comprises a rainwater sensor, a timer, a controller, a runoff collecting main pipe, a transmitter, a liquid level meter, a runoff collecting branch pipe and a sampling bottle, wherein the rainwater sensor is connected with the timer and the controller, the liquid level meter is connected with the timer and the controller through the transmitter, and the runoff collecting main pipe is connected with a rainwater runoff pipe of a house and is connected with the sampling bottle through the runoff collecting branch pipe.

The diameter of the runoff collecting main pipe is 100mm, and the diameter of the runoff collecting branch pipe is 50 mm.

The number of the sampling bottles is 12, and the volume of the sampling bottles is set according to the runoff volume required to be collected.

The invention has 12 electromagnetic valves, which are arranged on the runoff collecting branch pipe.

The controller of the present invention is programmable.

The invention controls the switch of the electromagnetic valve through the program setting of the controller.

According to the invention, the average flow of each sampling bottle during sampling of the runoff sample can be calculated through the volume of each sampling bottle and the time set by the timer, so that the change rule of the rainfall runoff flow in different time periods can be obtained.

The invention has the beneficial effects that:

(1) the runoff collecting device can conveniently collect runoff water samples, can collect the runoff water samples at different time points, conveniently calculate the flow of the different time points, and is convenient for researching the water quality and the hydrological change rule of the runoff water samples at the different time points.

(2) The runoff collection system is convenient to install and disassemble, and the environment cannot be damaged and the normal life of people around the runoff collection system cannot be influenced.

(3) The runoff collection device is simple, the required components are simple, and the manufacturing cost is low.

4 description of the drawings

FIG. 1 is a schematic diagram of the general structure of the present invention

Detailed description of the preferred embodiments

The invention is further illustrated by way of example in the following with reference to the accompanying drawings.

Reference numbers in the figures: 1. rainwater inductor, 2, time-recorder, 3, controller, 4, runoff collection trunk, 5, changer, 6, level gauge, 7, runoff collection branch pipe, 8, solenoid valve, 9, sampling bottle.

Example 1; the device is assembled according to each part of the drawing, then the device is connected with a roof rainwater pipe needing to be collected, when rainfall begins outdoors, a rainwater sensor (1) generates an electric signal and transmits the electric signal to a controller (3), the controller (3) transmits the signal to open an electromagnetic valve on a runoff collection main pipe (4), and simultaneously open an electromagnetic valve (8) of a leftmost runoff collection branch pipe (7), valves on the other branch pipes are kept in a closed state, rainwater runoff is continuously injected into a No. 1 sampling bottle (9) along with the progress of rainfall, if the rainfall intensity is high, a No. 1 container is filled within sampling time limited by a timer (2), at the moment, a No. 1 liquid level meter (6) generates a feedback signal and transmits the feedback signal to the controller (3), then the electromagnetic valve (8) on the No. 1 branch pipe is controlled to be closed, and the electromagnetic valve (8) on the No.; if the rainfall intensity is small, the sampling bottle No. 1 (9) is not enough to be filled in the limited sampling time, when the limited sampling time is reached, the timer (2) transmits a signal to the controller (3), the controller (3) controls the electromagnetic valve (8) on the branch pipe No. 1 to be closed, the electromagnetic valve (8) on the branch pipe No. 2 is opened … … to analogize the same, until 12 sampling bottles (9) are collected, the valves on the branch pipes are all in a closed state, the rainwater runoff which is not collected can be discharged through the runoff collection main pipe (4), so that the pipeline is kept clean, and the quality of next use is guaranteed.

Claims

1. An automatic rainwater runoff sampling device is characterized by comprising a rainwater sensor (1), a timer (2), a controller (3), a runoff collection main pipe (4), a plurality of transmitters (5), a plurality of liquid level meters (6), a plurality of runoff collection branch pipes (7), a plurality of electromagnetic valves (8) and a plurality of sampling bottles (9), wherein each runoff collection branch pipe (7) is provided with an electromagnetic valve (8), the rainwater sensor (1) is connected with the timer (2) and the controller (3), each sampling bottle (9) is connected with a liquid level meter (6) and a transmitter (5), the volume of the sampling bottle (9) is set according to the runoff volume to be collected, each liquid level meter (6) is connected with the timer (2) and the controller (3) through each transmitter (5), the runoff collection main pipe (4) is connected with a rainwater pipe and is connected with each sampling bottle (9) through each runoff collection branch pipe (7), within the sampling time limited by the timer (2), when a sample in a previous sampling bottle (9) is full, a liquid level meter (6) connected to the sampling bottle (9) generates a feedback signal, the feedback signal is sent to the controller (3), then an electromagnetic valve (8) on the sampling bottle (9) is controlled to be closed, and an electromagnetic valve (8) on the next sampling bottle (9) is controlled to be opened; or the previous sampling bottle (9) is not filled with the sample within the limited sampling time, when the limited sampling time is up, the timer (2) transmits a signal to the controller (3), the controller (3) controls the electromagnetic valve (8) on the sampling bottle (9) to be closed, and the electromagnetic valve (8) on the next sampling bottle (9) is opened.

2. An automatic sampling device of rainwater runoff according to claim 1, characterized in that the diameter of the runoff collection main pipe (4) is 100mm, and the diameter of the runoff collection branch pipe (7) is 50 mm.

3. An automatic rainwater runoff sampling device according to claim 1 and characterised in that there are 12 sampling bottles (9).

4. An automatic sampling device of rainwater runoff according to claim 1 characterized in that said solenoid valves (8) are 12 in number.

5. An automatic rainwater runoff sampling device according to claim 1 and wherein said controller (3) is programmable.