CN211060977U

CN211060977U - Open channel structure capable of measuring water flow

Info

Publication number: CN211060977U
Application number: CN201922149921.5U
Authority: CN
Inventors: 桂子荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-07-21
Anticipated expiration: 2029-12-04

Abstract

The utility model relates to an open channel structure of measurable quantity rivers flow is through laying the bottom plate bottom the open channel, and parallel arrangement guide plate on the bottom plate will cut apart into a plurality of rectangle sections through the water section. The side surface of each guide plate is provided with a bulge, so that the water flow between adjacent guide plates reaches a critical state. Under the critical state, the flow rate of the water passing through a single rectangular cross section is only a function of the water level, and the flow rates of the water passing through the rectangular cross sections are added to obtain the flow rate of the open channel. By adjusting the number and distribution of the guide plates, the open channel structure can be suitable for measuring the flow of the open channels with different widths, the structure is easy to realize, the cost is low, and the data acquisition and processing are simple.

Description

Open channel structure capable of measuring water flow

Technical Field

The utility model belongs to the technical field of canal flow measurement, in particular to open channel structure of different width open channel flows of measurable quantity.

Background

At present, two flow measurement methods are generally used for an open channel, one is a water level method, namely a weir groove method which obtains flow by adopting a water level-flow relation curve. The second is a flow velocity area method, which is a doppler profiler method, in which the flow is determined by measuring the area of the cross section of the water and the flow velocity of the cross section. The manufacturing of the weir groove is complex, civil facilities such as near channels, downstream channels, still water wells and the like need to be built during installation, the installation difficulty is high, the flow measurement range of the weir groove is narrow, and the weir groove is not suitable for wide open channels or large-flow measurement. Although the doppler profiler method can measure the flow of open channels with different widths, when measuring the flow of a wide open channel, an air-navigation acoustic doppler velocity profiler (ADCP) method is required, and river crossing carrier (such as a boat and a cableway) equipment is also required to be added to measure the flow velocity on different speed measuring vertical lines, so that the equipment cost is high, the measurement engineering quantity is large, the data processing relates to the water level, the flow velocity and the like on different speed measuring vertical lines, and the process is complicated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who exists among the prior art, provide the open channel structure who is applicable to the different width open channel flow of measurement, and the realization low cost of this open channel structure, data acquisition and processing procedure are simple.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides an open channel structure of measurable quantity rivers flow which characterized in that: the open channel structure comprises an open channel body, wherein a bottom plate is laid at the bottom of the open channel body; a plurality of guide plates are arranged on the bottom plate in parallel; the flow guide plates divide the water passing section into a plurality of sections; the adjacent guide plates and the bottom plate form a rectangular water flow channel; the side surfaces of the guide plates are provided with bulges, and water flow flowing between adjacent guide plates forms a critical flow state.

The utility model has the advantages that: through the quantity and the interval of adjustment guide plate, just applicable in the flow measurement of different width open channels, realize low cost.

In addition, the guide plate divides the water cross section of the open channel into a plurality of rectangular cross sections, critical flow is formed in each rectangular cross section, the flow in each rectangular cross section is only a function of the upstream water level, the water flow in each rectangular cross section can be calculated through the water level, the flow of each rectangular cross section is added to obtain the flow of the open channel, and the data acquisition and processing process is simple.

Further, the bottom plates laid at the bottom of the open channels have the same height.

The height of the bottom plate is the same, so that the realization process of the open channel structure capable of measuring the water flow is simpler, and the construction is convenient.

Further, the bottom plates between the adjacent guide plates have different heights.

The bottom plates with different heights can be constructed according to the shape of the bottom of the open channel, so that civil engineering materials can be saved, and the cost is reduced.

Furthermore, the protrusion arranged on the side surface of the guide plate is in a semi-cylindrical shape.

The semi-cylindrical protrusions have better flow limiting effect, so that water flow between adjacent guide plates reaches a critical state, the number of the guide plates in the open channel structure capable of measuring water flow is reduced, and equipment cost is reduced.

Furthermore, the bottom surface radius of the semi-cylindrical bulge arranged on the guide plate is the same.

The guide plate is easy to realize industrial production, and the manufacturing cost of the device can be effectively reduced.

Furthermore, the open channel structure of measurable quantity rivers flow, the guide plate is the rectangle, and sets up along the protruding symmetry of semi-cylindrical.

The shape of the guide plate is regular, so that the industrial production is easier to realize, and the manufacturing cost of the equipment can be effectively reduced.

Furthermore, the open channel structure of measurable quantity rivers flow, the guide plate evenly sets up on open channel bottom plate, will cross the water section and cut apart into the multistage with equidistant.

The areas of the rectangular cross sections are similar, and the data processing process is further simplified.

Furthermore, the open channel structure of measurable quantity rivers flow, one side that the guide plate is located the upper reaches section is equipped with the scale for measure the depth of water of upper reaches rivers.

The water level data can be directly read from the scale, and the data acquisition is simpler.

Furthermore, the open channel structure capable of measuring water flow also comprises a water level sensor and an information equipment control box, wherein the water level sensor is electrically connected with the information equipment control box, the water level sensor is arranged in each guide plate bulge and used for measuring the water depth between the upstream guide plates, and the water level sensor transmits the measured water depth value to the information equipment control box.

The automatic acquisition and on-line measurement of flow data can be realized.

Drawings

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

FIG. 2 is a schematic view of the structure of the deflector of the present invention;

fig. 3 is a top view of the open channel control section of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the open channel comprises an open channel body, 2, a bottom plate, 3, a rectangular section, 4, a guide plate, 5 and a protrusion.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the utility model provides an open channel structure capable of measuring water flow, which comprises an open channel body 1, wherein a bottom plate 2 is laid at the bottom of the open channel body; a plurality of guide plates 4 are arranged on the bottom plate in parallel; the flow guide plates divide the water passing section into a plurality of sections; a rectangular section 3 is formed between the adjacent guide plates and the bottom plate; the side surface of the guide plate 4 is provided with a bulge 5, so that the water flow passing between the adjacent guide plates forms a critical flow state.

The guide plate 4 can be arranged at the bottom of the open channel by the prior art, for example, the guide plate is arranged on a bottom plate at the bottom of the open channel by a screw fixing method and the like.

The utility model discloses a guide plate 4 overflows the section with the open channel and cuts apart into a plurality of

rectangle section

3, and 3 rivers in the rectangle section reach critical state, under critical state, cross a water section area regularly, and its water flow is the function of water level only, makes data processing process simplify greatly. Therefore, the construction of the rectangular cross section 3 is critical to the implementation of the present invention. The arrangement of the bottom plate 2 is to form a rectangular flow section 3 between adjacent guide plates, so that the heights of the bottom plates 2 between the adjacent guide plates can be the same or different on the premise of meeting the shape of the section, and even the bottom plate 2 is not laid for an open channel with a straight bottom. The floor may be laid using known techniques, such as a concrete cast lining. The bottom plate 2 is laid by adopting the prior art, for example, a dam is built at the upstream of the open channel to intercept water flow, then the bottom plate is arranged at the installation section, the flow guide plate is installed, then the dam body is dismantled, the water flow passes through the flow guide plate, and flow measurement is carried out.

Fig. 2 is the schematic diagram of the structure of the flow guide plate of the present invention, and the flow guide plate 4 is provided with a semi-cylindrical protrusion 5. Or the two sides of the guide plate 4 are simultaneously provided with the semi-cylindrical bulges 5 to form a complete cylindrical bulge.

Fig. 3 is the utility model discloses open channel control section top view, two guide plate sides that are located the outside form the semicircle column arch 5 inwards, are cylindric arch on all the other guide plates.

In order to ensure the generation of the critical flow state, the distance between adjacent guide plates and the radius of the bulge have to meet a certain proportion requirement, if the radius of the bulge is too small, the critical flow cannot be generated, and conversely, if the radius of the bulge is too large, the generated flow blocking effect is too large, and the flow passing capacity is unnecessarily reduced.

When the device is applied, hydraulics experiments are carried out on guide plates of various types in a laboratory in advance, so that the relation between the convex radius and the distance on the guide plate required for forming critical flow and the functional relation between the distance between the adjacent guide plates, the convex radius, the water level and the flow are determined, and the conversion between the actually measured water level and the actually measured flow is realized.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides an open channel structure of measurable quantity rivers flow which characterized in that: the open channel structure comprises an open channel body, wherein a bottom plate is laid at the bottom of the open channel body; a plurality of guide plates are arranged on the bottom plate in parallel; the flow guide plates divide the water passing section into a plurality of sections; a rectangular water flow channel is formed between the adjacent guide plates and the bottom plate; the side surfaces of the guide plates are provided with bulges, and water flow flowing between adjacent guide plates forms a critical flow state.

2. The open channel structure for measuring flow of water of claim 1 wherein the floors of adjacent baffles are of the same height.

3. The open channel structure for measuring flow of water of claim 1 wherein the floors of adjacent baffles are of different heights.

4. The open channel structure for measuring water flow according to claim 3, wherein the protrusions provided on the side surface of the deflector are semi-cylindrical.

5. The open channel structure for measuring water flow according to claim 4, wherein the bottom surface of the semi-cylindrical protrusions on the side surface of the deflector has the same diameter.

6. The open channel structure of claim 5, wherein the deflector is rectangular and symmetrically disposed along the semi-cylindrical protrusion.

7. The open channel structure of any one of claims 1 to 6, wherein the flow deflectors are uniformly arranged on the bottom plate to divide the flow cross section into a plurality of sections at equal intervals.

8. The open channel structure for measuring water flow according to any one of claims 1-6, wherein the side of the deflector located at the upstream section is provided with a scale for measuring the depth of the upstream water flow.

9. The open channel structure capable of measuring water flow according to any one of claims 1 to 6, further comprising a water level sensor and an information equipment control box, wherein the water level sensor is electrically connected with the information equipment control box, and the water level sensor is arranged in the protrusion of each guide plate.