Device and method for rapidly measuring flow of river channel sewage draining exit

Abstract

The invention provides a device and a method for rapidly measuring the flow of a river drain outlet, and relates to the technical field of environment detection. The device comprises a cylinder body, a hose and a water suction head, wherein a water vapor inlet in the upper part of the cylinder body is connected with the water suction head through the hose; the bottom of the air area and the bottom of the water area are not communicated, the steam inlet is located in the top of the water area, and a vertically-downward water filter screen is installed at the position, close to the partition plate, of the water area from the top of the barrel. A turbofan is installed on the bottom side wall of the middle air area part of the barrel, and a drainage pump is installed on the bottom side wall of the water area part of the barrel. During measurement, the water suction head is arranged at a water flow passing position, a turbofan switch is turned on, a negative pressure area is instantly formed in the local part of the water suction head, river entering drainage is cut off, irregular water flow and air around the water suction head are all sucked into the barrel, and after the water flow entering the barrel is intercepted by the water filter screen, the air enters the air area, and the water is left in the water area; and the flow of the drain outlet is displayed through the water quantity counter. The method is suitable for irregular drainage of the two sides of the river channel and is convenient to measure and 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 new device for quickly measuring the flow rate of river sewage outlets. Summary of the invention

[0005] In order to solve the above technical problems existing in the prior art, the embodiment of the present invention provides a device and method for quickly measuring the flow rate of a river sewage outlet. The technical solution is as follows:

[0006] A rapid flow measurement device for a river sewage outlet comprises a cylinder, a hose and a water suction head, wherein a water vapor inlet on the upper part of the cylinder is connected to the water suction head through a hose;

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

[0008] A turbo fan is installed on the bottom side wall of the wind zone of the cylinder.

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

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

[0011] A water volume counter is installed on the side wall of the cylinder. 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 absorption time after the water absorption head stops absorbing water, that is, the flow rate = the volume of water in the water area / the water absorption time.

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

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

[0014] The height of the water filter net is 1 / 2 to 2 / 3 of the height of the cylinder, 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 net, the mesh size of the steel wire net is 5-15mm, and the diameter of the steel wire is 0.5-3mm.

[0016] The turbofan is installed on the side wall of the cylinder at a height of 1 / 5 to 1 / 4 of the cylinder from the bottom, and the turbofan power is not less than 5KW. At least 3 sensors are set along the inner wall of the cylinder at a height of 1 / 5 of the cylinder from the bottom of the water zone, and the sensor signal is transmitted to the turbofan switch.

[0017] The application method of the measuring device is specifically as follows: placing the entire device on the horizontal ground next to the river sewage outlet, then placing the water suction head where the water flows, turning on the turbofan switch, instantly forming a negative pressure area at the water suction head, cutting 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. After the water entering the cylinder is intercepted by the water filter net, the air enters the wind area and is discharged through the turbofan. The water flow remains in the water area under the action of gravity. When the water volume exceeds all sensors (the machine stops at the moment all sensors are immersed in water), the turbofan switch is automatically turned off, and the water absorption time is recorded. The water suction head is taken out, and the sewage outlet flow is displayed through the water volume counter; finally, the drainage pump is turned on to discharge the sewage in the cylinder.

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

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

[0020] In the above scheme, the device has a simple structure, a small size, is easy to carry, and can perform real-time measurement of the flow rate of a small-flow sewage outlet with accurate data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0023] Figure 2 It is a schematic diagram of the structure of another form of a rapid flow measurement device for a river sewage outlet in an embodiment of the present invention.

[0024] Among them: 1-cylinder; 2-water vapor inlet; 3-turbo fan; 4-drainage pump; 5-hose; 6-water suction head; 7-partition; 8-water filter net; 9-centrifugal component. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is described below in conjunction with the accompanying drawings.

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

[0027] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0028] The embodiment of the present invention provides a device and method for quickly measuring the flow rate of a river sewage outlet. Figure 1 The device for quickly measuring the flow rate of a river sewage outlet shown in the figure comprises a cylinder 1, a hose 5 and a water suction head 6, wherein the water vapor inlet 2 at the upper part of the cylinder 1 is connected to the water suction head 6 through the hose 5;

[0029] 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 vapor inlet 2 is located at the top of the water area. A water filter net 8 is installed vertically downward from the top of the cylinder 1 near the partition.

[0030] The bottom side wall of the wind zone of the cylinder 1 is equipped with a turbo fan 3.

[0031] A drainage pump 4 is installed on the bottom side wall of the water area 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 of the cylinder 1 at a distance of 13 cm from the side wall where the turbofan 3 is installed, and the height of the partition 7 is 40 cm; a water filter 8 is installed vertically downward from the top of the cylinder 1 at a distance of 15 cm from the side wall where the turbofan 3 is installed, and the water filter is parallel to the partition, and the height of the water filter is 45 cm.

[0033] The water filter is made of double-layer steel wire mesh with a mesh size of 10mm and a steel wire diameter of 1mm.

[0034] The turbofan is installed on the side wall of the cylinder 18cm away from the bottom. The turbofan is driven by a high-power brushless motor with a power of 5000w. In actual applications, the power supply must be able to meet the instantaneous high power requirements of the turbofan.

[0035] During measurement, place the entire device on the horizontal ground next to the river sewage outlet, then place the water suction head where the water flows, turn on the turbofan switch, and instantly form a negative pressure area at 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 entering the cylinder is intercepted by the water filter net, the air enters the wind area and is discharged through the turbofan. The water flow remains in the water area under the action of gravity. At the moment when the water volume exceeds all sensors, the turbofan switch is automatically turned off (the water absorption time is very short, generally not more than 5s), and the water absorption time is recorded. The water suction head is taken out, and the sewage outlet flow is displayed through the water volume counter; finally, the flow meter drainage pump is turned on to discharge the sewage in the cylinder.

[0036] In another design, in order to enhance suction and promote water vapor separation, such as Figure 2 A centrifugal component 9 is installed at the water vapor inlet 2 to separate the inhaled water vapor through centrifugation, the gas is discharged through the turbofan 3, and the liquid flows down along the water filter 8 and the inner wall of the cylinder 1 and is stored in the cylinder. The centrifugal component here can also be realized by a micro centrifugal pump. If a centrifugal component is used, the power of the centrifugal component must be no less than 5kw. At this time, the turbofan is not started and is only used for passive exhaust.

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

[0038] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A rapid flow measurement device for a river sewage outlet, characterized in that: It comprises a cylinder, a hose and a water suction head, wherein the water vapor inlet on the upper part of the cylinder is connected to the water suction head through the hose; The cylinder is vertically divided into two parts, a wind area and a water area, which are not connected at the bottom, by a partition. The water vapor inlet is located at the top of the water area. A water filter net is installed vertically downward from the top of the cylinder near the partition. A turbo fan is installed on the bottom side wall of the wind zone of the cylinder. A drainage pump is installed on the bottom side wall of the water zone portion of the cylinder.

2. The rapid flow measurement device for a river sewage outlet according to claim 1 is characterized in that: The cylinder is circular or square, the partition is parallel to the side wall where the turbofan is located, and the water filter is parallel to the partition; A water volume counter is installed on the side wall of the cylinder.

3. The rapid flow measurement device for a river sewage outlet according to claim 1 is characterized in that: The length of the wind zone accounts for 1 / 4 to 1 / 3 of the side length of the cylinder.

4. The rapid flow measurement device for a river sewage outlet according to claim 1 is characterized in that: The height of the partition is 1 / 2 to 2 / 3 of the height of the cylinder.

5. The rapid flow measurement device for a river sewage outlet according to claim 1 is characterized in that: The height of the water filter net is 1 / 2 to 2 / 3 of the height of the cylinder, and the bottom of the water filter net is lower than the top of the partition.

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

7. The rapid flow measurement device for a river sewage outlet according to claim 1 is characterized in that: The turbofan is installed on the side wall of the cylinder at a position 1 / 5 to 1 / 4 of the cylinder height from the bottom, and the turbofan power is not less than 5KW.

8. The rapid flow measurement device for a river sewage outlet according to claim 1 is characterized in that: No less than three sensors are arranged along the inner wall of the cylinder at a distance of 1 / 5 of the cylinder height from the bottom of the water zone, and the sensor signals are transmitted to the turbofan switch.

9. The application method of the device for rapid flow measurement of a river sewage outlet according to claim 1, characterized in that: Place the entire device on the horizontal ground next to the river sewage outlet, then place the water suction head where the water flows, turn on the turbofan switch, and instantly form a negative pressure area at the water suction head to cut off the drainage into the river. The water suction head will suck all the irregular water flow and air at the sewage outlet into the cylinder. After the water entering the cylinder is intercepted by the water filter net, the air enters the wind area and is discharged through the turbofan. The water flow remains in the water area under the action of gravity. When the water volume exceeds all sensors, the turbofan switch is automatically turned off, and the water absorption time is recorded. The water suction head is taken out, and the sewage outlet flow is displayed through the water volume counter; finally, turn on the drainage pump to discharge the sewage in the cylinder.

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

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