A device and method for rapidly measuring the flow rate of a river sewage outlet

Abstract

The present invention provides a device and method for quickly measuring the flow rate of a river sewage outlet, which relates to the technical field of environmental detection. The device includes a cylinder body, a hose and a water suction head. The air-water inlet at the upper part of the cylinder body is connected to the water suction head through the hose. The cylinder body is vertically divided into a non-connected wind area and a water area at the bottom by a partition board. The air-water inlet is located at the top of the water area. A water filtering net is installed vertically downward from the top of the cylinder body near the partition board in the water area. A turbine fan is installed on the bottom side wall of the wind area part in the cylinder body, and a drainage pump is installed on the bottom side wall of the water area part in the cylinder body. During measurement, the water suction head is placed at the place where the water flows through. The switch of the turbine fan is turned on, and an instant negative pressure area is formed locally at the water suction head, cutting off the river inlet drainage. All the irregular water flow and air around the water suction head are sucked into the cylinder body. After the water flowing into the cylinder body is intercepted by the water filtering net, the air enters the wind area and the water remains in the water area. The flow rate of the sewage outlet is displayed through a water volume counter. This method is applicable to irregular drainage on both sides of the river, with convenient measurement and easy use.

Description

Technical Field

[0001] The invention relates to the technical field of environmental detection, and in particular to a device and method for quickly measuring the flow rate of a river sewage outlet. Background Art

[0002] The management of sewage outlets into rivers is one of the important tasks to control the total amount of pollutants entering rivers and protect the water environment of rivers. Flow monitoring is a basic indicator for the supervision of sewage outlets into rivers, which can provide a basis for pollution source evaluation and environmental law enforcement. However, sewage outlets into rivers are often located below riverbanks, or there is a certain slope or vertical riverbanks. They are mostly in the form of square or round pipes, and some are in the form of small channels, making it difficult for people to go down. In actual sewage discharge, it is mostly in the form of a small amount of drainage or dripping, and the water flow is extremely irregular. The use of traditional methods is not only time-consuming and labor-intensive, but also difficult to accurately measure the sewage discharge flow.

[0003] At present, the commonly used methods for measuring the flow rate of sewage outlets mainly include the velocity meter method, Doppler ultrasonic flow meter method, volumetric method, water tank method, overflow weir method and buoy method. The velocity meter method measures the water flow cross-sectional area of the sewage channel, uses a velocity meter to measure the sewage flow rate, and then calculates the flow rate. This method is suitable for sewage measurement in a wider channel, requiring the bottom of the sewage section to be hard and smooth, and a certain straight water section. The Doppler ultrasonic flow meter method is suitable for pipeline sewage outlets, especially circular pipes or square culverts. The flow rate is calculated by measuring the Doppler frequency shift of sound waves. It is suitable for various water bodies and flow ranges, but the equipment needs to be installed at the bottom of the pipe network and is easily disturbed by floating objects. The volumetric method is to put the sewage into a container with a known capacity and measure the time required to fill the container. This method is suitable for measuring continuous or intermittent small amounts of sewage with high accuracy, but requires an appropriate drop or aqueduct to form a drop. The flume method is to install a flume in an open channel or culvert and measure the upstream water level to calculate the flow rate. The Bass flume is a commonly used flume with high measurement accuracy, but high cost and high construction requirements. The overflow weir method is to install an open weir plate of a specific shape on a fixed-shaped channel and calculate the flow rate by measuring the water head over the weir. This method has high accuracy and can achieve continuous automatic measurement, but there will be a certain head loss after installing the level meter. The buoy method is to deduce the flow rate by measuring the speed of natural or artificial floating objects on the water surface or in the water with the water flow. This method is suitable for shallow water depth or low flow rate. It is necessary to select appropriate river sections and buoys for measurement. It can be seen that the existing measurement devices and methods have more or less problems, and the flow measurement of sewage outlets is of great significance in environmental protection. Accurately measuring the flow of sewage outlets can help determine the pollution capacity of water areas and control the total amount of sewage discharged into rivers and lakes. It is an important basis for the preparation of water resource protection plans and the management of water functional areas. In addition, sewage outlet flow monitoring can also help assess water quality, prevent water pollution incidents, and promote sustainable development.

[0004] Therefore, it is particularly necessary to design a brand-new device for quickly measuring the flow rate of river sewage outlets. Summary of the Invention

[0005] To solve the above technical problems existing in the prior art, an embodiment of the present invention provides a device and method for quickly measuring the flow rate of river sewage outlets. The technical solutions are as follows:

[0006] A device for quickly measuring the flow rate of river sewage outlets includes a cylinder body, a hose, and a water suction head. The gas-water inlet at the upper part of the cylinder body is connected to the water suction head through the hose;

[0007] The inside of the cylinder body is vertically divided into two parts, a wind area and a water area, which are not connected at the bottom, by a partition. The gas-water inlet is located at the top of the water area. A water filter net is installed vertically downward from the top of the cylinder body near the partition in the water area;

[0008] A turbine fan is installed on the bottom side wall of the wind area part in the cylinder body,

[0009] A drainage pump is installed on the bottom side wall of the water area part in the cylinder body.

[0010] The cylinder body is circular or square. The partition is parallel to the side wall where the turbine fan is located, and the water filter net is parallel to the partition.

[0011] A water volume counter is installed on the side wall of the cylinder body. The water volume counter can automatically calculate and display the flow rate according to the volume of water in the water area and the water suction time after the water suction head stops sucking water, that is, flow rate = volume of water in the water area / water suction time.

[0012] The length of the wind area accounts for 1 / 4 to 1 / 3 of the side length of the cylinder body.

[0013] The height of the partition is 1 / 2 to 2 / 3 of the height of the cylinder body.

[0014] The height of the water filter net is 1 / 2 to 2 / 3 of the height of the cylinder body, and the bottom of the water filter net is lower than the top of the partition.

[0015] The water filter net is a double-layer steel wire mesh. The mesh size of the steel wire mesh is 5 to 15 mm, and the diameter of the steel wire is 0.5 to 3 mm.

[0016] The turbine fan is installed at a position 1 / 5 to 1 / 4 of the height of the cylinder body from the bottom on the side wall of the cylinder body, and the power of the turbine fan is not less than 5 KW. At least 3 sensors are arranged along the inner wall of the cylinder body at a position 1 / 5 of the height of the cylinder body from the bottom in the water area, and the signals of the sensors are transmitted to the turbine fan switch.

[0017] The application method of the measuring device is as follows: specifically, place the whole device on the horizontal ground beside the river sewage outlet, then place the water suction head at the place where the water flows through, turn on the switch of the turbine fan, instantly form a negative pressure area at the local part of the water suction head, cut off the drainage into the river, and the water suction head sucks all the irregular water flow and air at the sewage outlet into the cylinder body. After the water flowing into the cylinder body is intercepted by the water filter net, the air enters the wind area and is discharged through the turbine fan, and the water stays in the water area under the action of gravity. When the water quantity covers all the sensors (stop the machine instantly when all the sensors are immersed in water), the switch of the turbine fan automatically closes, and the water suction duration is recorded. Take out the water suction head, and the sewage outlet flow rate is displayed through the water quantity counter; finally, turn on the drainage pump to discharge the sewage in the cylinder body.

[0018] The device and method are applicable to river sewage outlets with a flow rate not exceeding 0.2 m³ / s.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the present invention at least include:

[0020] In the above solution, the device has a simple structure, a small volume, and is convenient to carry. It can measure the flow rate of small-flow sewage outlets in real time with accurate data. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a device for quickly measuring the flow rate of a river sewage outlet provided by an embodiment of the present invention;

[0023] Figure 2 It is a schematic structural diagram of another form of a device for quickly measuring the flow rate of a river sewage outlet in an embodiment of the present invention.

[0024] Wherein: 1 - cylinder body; 2 - water and gas inlet; 3 - turbine fan; 4 - drainage pump; 5 - hose; 6 - water suction head; 7 - partition board; 8 - water filter net; 9 - centrifugal component. Detailed Embodiments

[0025] The following will describe the technical solutions in the present invention with reference to the drawings.

[0026] In the embodiments of the present invention, words such as "exemplarily" and "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design described as an "example" in the present invention should not be construed as being more preferred or more advantageous than other embodiments or designs. Rather, the use of the word "example" is intended to present concepts in a specific manner. In addition, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one of the two.

[0027] To make the technical problems, technical solutions, and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] The embodiments of the present invention provide a device and method for quickly measuring the flow rate of a river sewage outlet. As Figure 1 shown, a device for quickly measuring the flow rate of a river sewage outlet includes a cylinder 1, a hose 5, and a water suction head 6. The water and gas inlet 2 at the upper part of the cylinder 1 is connected to the water suction head 6 through the hose 5;

[0029] The inside of the cylinder 1 is vertically divided into two parts, a wind area and a water area, which are not connected at the bottom, by a partition 7. The water and gas inlet 2 is located at the top of the water area. A water filtering net 8 is installed vertically downward from the top of the cylinder 1 near the partition in the water area;

[0030] A turbo fan 3 is installed on the bottom side wall of the wind area part of the cylinder 1,

[0031] A drainage pump 4 is installed on the bottom side wall of the water area part of the cylinder 1.

[0032] In the actual design, the cylinder 1 is designed to be square, with a side length of 50 cm and a height of 80 cm. A vertical partition 7 is installed at the bottom inside the cylinder 1, 13 cm away from the side wall where the turbo fan 3 is installed, and the height of the partition 7 is 40 cm; a water filtering net 8 is installed vertically downward from the top inside the cylinder 1, 15 cm away from the side wall where the turbo fan 3 is installed. The water filtering net is parallel to the partition, and the height of the water filtering net is 45 cm.

[0033] The water filtering net is made of double-layer steel wire mesh, the mesh size of the steel wire mesh is 10 mm, and the diameter of the steel wire is 1 mm.

[0034] The turbo fan is installed 18 cm away from the bottom on the side wall of the cylinder. The turbo fan is driven by a high-power brushless motor with a power of 5000 w. In actual applications, the power supply needs to ensure that it can meet the requirements of the instantaneous high power of the turbo fan.

[0035] During measurement, place the entire device on the horizontal ground beside the river sewage outlet, then place the water suction head at the location where the water flows through, turn on the turbine fan switch, and instantly form a negative pressure area at the local part of the water suction head to cut off the drainage into the river. The water suction head quickly sucks all the irregular water flow and air at the sewage outlet into the cylinder. After the water flow entering the cylinder is intercepted by the water filter screen, the air enters the wind area and is discharged through the turbine fan, and the water flow stays in the water area under the action of gravity. The turbine fan switch automatically closes instantly when the water level covers all the sensors (the water suction time is very short, generally not exceeding 5 s), and the water suction duration is recorded. Then take out the water suction head, and the sewage outlet flow rate is displayed through the water volume counter. Finally, turn on the flow measurement and drainage pump to discharge the sewage in the cylinder.

[0036] In another design, in order to enhance the suction force and promote the separation of water and gas, such as Figure 2 , install a centrifugal component 9 at the water and gas inlet 2 to separate the inhaled water and gas through centrifugation. The gas is discharged through the turbine fan 3, and the liquid flows down along the water filter screen 8 and the inner wall of the cylinder 1 and is stored in the cylinder. Here, the centrifugal component can also be realized by a micro centrifugal pump. If the centrifugal component is adopted, the power of the centrifugal component should not be less than 5 kw. At this time, the turbine fan does not start and is only used for passive exhaust.

[0037] The device and method of the present invention are applicable to river sewage outlets with a flow rate not exceeding 0.2 m³ / s, and can conveniently and quickly calculate the real-time sewage discharge volume of small-flow sewage outlets.

[0038] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A device for quickly measuring the flow rate of a river sewage outlet, characterized in that, It includes a cylinder body, a hose and a water suction head. The water and gas inlet at the upper part of the cylinder body is connected to the water suction head through the hose. Inside the cylinder body, it is vertically divided into two parts, a wind area and a water area with non-connected bottoms, by a partition board. The water and gas inlet is located at the top of the water area. A water filtering net is installed vertically downward from the top of the cylinder body near the partition board in the water area. A turbine fan is installed on the bottom side wall of the wind area part in the cylinder body. A drainage pump is installed on the bottom side wall of the water area part in the cylinder body.

2. The rapid flow rate measuring device for river sewage outlets according to claim 1, characterized in that, The cylinder body is circular or square. The partition board is parallel to the side wall where the turbine fan is located, and the water filtering net is parallel to the partition board. A water volume counter is installed on the side wall of the cylinder body.

3. The rapid flow rate measuring device for river sewage outlets according to claim 1, wherein The length of the wind area accounts for 1 / 4 - 1 / 3 of the side length of the cylinder body.

4. The rapid flow rate measuring device for river sewage outlets according to claim 1, characterized in that, The height of the partition board is 1 / 2 - 2 / 3 of the height of the cylinder body.

5. The rapid flow measurement device for river sewage outfalls according to claim 1, characterized in that, The height of the water filtering net is 1 / 2 - 2 / 3 of the height of the cylinder body, and the bottom of the water filtering net is lower than the top of the partition board.

6. The rapid flow measurement device for river sewage outlets according to claim 1, characterized in that, The water filtering net is a double-layer steel wire mesh. The mesh size of the steel wire mesh is 5 - 15 mm, and the diameter of the steel wire is 0.5 - 3 mm.

7. The rapid flow rate measuring device for river sewage outlets according to claim 1, characterized in that The turbine fan is installed at a position 1 / 5 - 1 / 4 of the height of the cylinder body from the bottom on the side wall of the cylinder body, and the power of the turbine fan is not less than 5 KW.

8. The rapid flow rate measuring device for river sewage outlets according to claim 1, characterized in that, No less than 3 sensors are arranged along the inner wall of the cylinder body at a position 1 / 5 of the height of the cylinder body from the bottom in the water area. The signals of the sensors are transmitted to the switch of the turbine fan.

9. The application method of the device for rapid determination of the flow rate of river sewage outlets according to claim 1, characterized in that, Place the whole device on the horizontal ground beside the river sewage outlet, then place the water suction head at the place where the water flows through. Turn on the switch of the turbine fan. Instantly, a negative pressure area is formed locally at the water suction head, cutting off the drainage into the river. The water suction head sucks all the irregular water flow and air at the sewage outlet into the cylinder body. After the water flowing into the cylinder body is intercepted by the water filtering net, the air enters the wind area and is discharged through the turbine fan. The water stays in the water area under the action of gravity. When the water volume covers all the sensors, the switch of the turbine fan automatically closes, and the water suction duration is recorded. Take out the water suction head, and the sewage outlet flow rate is displayed through the water volume counter. Finally, turn on the drainage pump to discharge the sewage in the cylinder body.

10. The application method of the rapid flow measurement device for river sewage outlets according to claim 9, characterized in that, The device and method are applicable to river sewage outlets with a flow rate not exceeding 0.2 m³ / s.

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