CN104280084A - A New Type of Open Channel Flowmeter - Google Patents

Abstract

The invention discloses a novel open channel flowmeter, which belongs to the technical field of flow detection devices, wherein a pair of trapezoidal water retaining pieces are arranged on the inner side of the right end of a weir groove water measuring device, a liquid level measuring groove is arranged on one side of each trapezoidal water retaining piece, an ultrasonic liquid level measuring instrument is arranged at the upper end of each liquid level measuring groove, a filter mesh screen is arranged at the inlet of each liquid level measuring groove, a water flow velocity measuring sensor is arranged inside each trapezoidal water retaining piece, and the water flow velocity measuring sensor and the ultrasonic liquid level measuring instrument are connected to a master control conversion flowmeter through data transmission lines. The liquid level measuring device is simple in structure, the matching of the main flow channel and the auxiliary flow channel is adopted, the main flow channel is used for measuring the flow velocity of fluid, the auxiliary flow channel is used for measuring the liquid level height, the work division operation is carried out, the mutual influence is avoided, and the measuring precision is improved.

Description

A New Type of Open Channel Flowmeter

technical field

The invention relates to a new type of open channel flowmeter, which belongs to the technical field of flow detection devices.

Background technique

With the acceleration of the industrialization process, water resources have suffered serious pollution. The country has set the total amount of sewage discharged by industrial production as a control target, and has increased the work of energy conservation and emission reduction. Every year in our country, a large amount of industrial wastewater and domestic sewage are discharged directly without treatment or after simple treatment, which makes the problem of water resource shortage more and more serious. In order to effectively promote the work of sewage treatment and environmental protection, it is urgent to measure and comprehensively manage and control sewage discharge. Scientific, accurate and reliable data to meet the billing needs of the environmental protection department and effectively improve the work efficiency of energy conservation and emission reduction.

As a kind of sewage flow measurement, the weir flume open channel flowmeter is widely used in the field of monitoring and measurement of industrial wastewater discharge. However, due to its special structure, it is difficult to carry out real flow verification, making it difficult to guarantee the accuracy of measurement. The existing weir flume open channel flowmeter is generally a single channel weir flume, and the liquid level fluctuates greatly in the fluid with more impurities, and the measurement is not accurate.

Contents of the invention

In view of the above problems, the technical problem to be solved by the present invention is to provide a new type of open channel flowmeter, which has a simple structure and adopts the cooperation of the main flow channel and the auxiliary flow channel. Liquid level height, separate work, avoid mutual influence, and improve measurement accuracy.

A novel open channel flowmeter of the present invention comprises a weir flume water measuring device, a trapezoidal water retaining member, a liquid level measuring tank, a water flow velocity measuring sensor, an ultrasonic liquid level measuring instrument, a main control conversion flowmeter, and a filter screen, A pair of trapezoidal water retaining parts are provided on the inner side of the right end of the weir flume water measuring device, a liquid level measuring tank is provided on one side of the trapezoidal water retaining parts, an ultrasonic liquid level measuring instrument is installed on the upper end of the liquid level measuring tank, and the liquid level A filter screen is provided at the entrance of the measuring tank, and a water flow velocity measurement sensor is arranged inside the trapezoidal water retaining member, and the water flow velocity measurement sensor and the ultrasonic liquid level measuring instrument are connected to the main control conversion flowmeter through a data transmission line .

As a preference, the left end of the weir flume measuring device is provided with a section of smooth steady flow weir flume.

Preferably, the entrance of the liquid level measuring tank is provided with a trapezoidal water stop on the side wall.

When the present invention is in operation, the fluid passes through a section of smooth stabilizing groove, so that the fluid flow rate is kept consistent and transmitted, and then when the fluid passes through the trapezoidal water retaining member, most of the fluid passes through the main channel and passes through the water flow velocity measurement sensor to measure the fluid flow velocity, while a small part of the fluid Through the liquid level measuring tank, the height is also measured by the ultrasonic liquid level measuring instrument, and then converted to the main control conversion flowmeter to obtain the flow rate.

Beneficial effects of the present invention: it has a simple structure, and adopts the cooperation of the main flow channel and the auxiliary flow channel. precision.

Description of drawings

For ease of illustration, the present invention is described in detail by the following specific implementations and accompanying drawings.

Fig. 1 is a schematic structural view of the present invention.

Detailed ways

As shown in Figure 1, this specific embodiment adopts the following technical scheme: it includes a weir flume water measuring device 1, a trapezoidal water retaining member 2, a liquid level measuring tank 3, a water flow velocity measuring sensor 4, an ultrasonic liquid level measuring instrument 5, and a main control conversion Flow meter 6, filter screen 7, a pair of trapezoidal water retaining parts 2 are arranged on the inner side of the right end of the weir flume water measuring device 1, and a liquid level measuring tank 3 is arranged on one side of the trapezoidal water retaining parts 2, and the liquid level measuring tank The upper end of 3 is equipped with an ultrasonic liquid level measuring instrument 5, and the entrance of the liquid level measuring tank 3 is provided with a filter screen 7, and the inside of the trapezoidal water retaining member 2 is provided with a water flow velocity measuring sensor 4, and the water flow The flow velocity measurement sensor 4 and the ultrasonic liquid level measuring instrument 5 are connected to the main control conversion flowmeter 6 through a data transmission line.

Wherein, the left end of the weir flume water measuring device 1 is provided with a section of smooth steady flow weir flume. The entrance of the liquid level measuring tank 3 is provided with a trapezoidal water stop 2 on the side wall.

When the present invention is in operation, the fluid passes through a smooth stabilizing groove to keep the fluid flow rate consistent, and then when the fluid passes through the trapezoidal water retaining member, most of the fluid passes through the main channel and passes through the water flow velocity measurement sensor to measure the fluid velocity, while a small part of the fluid passes through The liquid level measurement tank is also measured by the ultrasonic liquid level measuring instrument as the height, and then transmitted to the main control conversion flowmeter for conversion to obtain the flow rate.

The structure of this specific implementation is simple, and the cooperation of the main flow channel and the auxiliary flow channel is adopted. The main flow channel is used to measure the fluid flow rate, and the auxiliary flow channel is used to measure the liquid level height, and the work is divided to avoid mutual influence and improve the measurement accuracy.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (3)

1. a novel open-channel meter, it is characterized in that: it comprises weir notch water gaging device (1), trapezoidal water deflector (2), level gauging groove (3), flow rate of water flow survey sensor (4), Ultrasonic Liquid Level Indicator (5), master control reduced discharge meter (6), filter mesh screen (7), a pair trapezoidal water deflector (2) is provided with inside the right-hand member of described weir notch water gaging device (1), the side of trapezoidal water deflector (2) is provided with level gauging groove (3), the upper end of level gauging groove (3) is provided with Ultrasonic Liquid Level Indicator (5), and the porch of level gauging groove (3) is provided with filtration mesh screen (7), the inside of described trapezoidal water deflector (2) is provided with flow rate of water flow survey sensor (4), described flow rate of water flow survey sensor (4), Ultrasonic Liquid Level Indicator (5) is connected to master control reduced discharge meter (6) by data line.

2. a kind of novel open-channel meter according to claim 1, is characterized in that: the left end of described weir notch water gaging device (1) is provided with one section of level and smooth current stabilization weir notch.

3. a kind of novel open-channel meter according to claim 1, is characterized in that: the porch of described level gauging groove (3) is provided with on the sidewall of trapezoidal water deflector (2).