CN112013916A

CN112013916A - Volumetric flowmeter

Info

Publication number: CN112013916A
Application number: CN202010907592.0A
Authority: CN
Inventors: 曹军; 周林
Original assignee: Changsha Xiaoma Feichi Industrial Design Co ltd
Current assignee: Changsha Xiaoma Feichi Industrial Design Co ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2020-12-01

Abstract

The invention discloses a flowmeter for measuring leakage water of a generator of a water conservancy power plant, which comprises an equipment body, a drainage funnel, a temporary storage container, a measuring container, a liquid level sensor, a singlechip control module, a first electromagnetic valve, a second electromagnetic valve and a water outlet. The top of the temporary storage container is connected with the drainage funnel, the bottom of the temporary storage container is connected with one end of the first electromagnetic valve, the top of the metering container is connected with the other end of the first electromagnetic valve, the bottom of the metering container is connected with one end of the second electromagnetic valve, the water outlet is connected with the other end of the second electromagnetic valve, the liquid level sensor is installed in the metering container, and the first electromagnetic valve and the second electromagnetic valve are alternately opened and closed under the control module of the single chip microcomputer. The invention discloses a flowmeter for measuring leakage water of a generator of a water conservancy power plant, belongs to the field of flowmeter equipment, and can accurately measure intermittent flowing water flow without water pressure.

Description

Volumetric flowmeter

Technical Field

The invention relates to the field of flowmeter equipment, in particular to a volumetric flowmeter, and particularly relates to a flowmeter for measuring leakage water of a generator of a hydraulic power plant.

Background

At present, when a generator of a common hydroelectric power plant operates, a small part of water leaks out through the generator, the leakage water flow needs to be monitored in real time, and when the leakage flow does not exceed a safety value, the normal operation state is obtained. Since this leakage flow is intermittent and there is no water pressure, conventional flow meters are not suitable. At present, a power plant worker generally adopts a volume timing calculation method, namely a container is adopted to collect generator leakage water, the volume of the collected leakage water in a period of time is measured at regular time, and the flow is estimated. Therefore, the problems of large workload, incapability of monitoring the flow in real time and low estimation resolution and measurement precision exist in the actual operation process.

Disclosure of Invention

The invention mainly aims to provide a flowmeter for metering leakage water of a generator of a water conservancy power plant, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a flowmeter for measuring leakage water from a hydroelectric power plant generator, comprising:

the equipment body, single chip microcomputer control module, level sensor, equipment body top fixed mounting has the ring flange water inlet, equipment body surface mounting has the display screen, the outlet is installed to equipment body bottom, equipment body is inside from last to extremely down, installs the drainage funnel that is connected with there being the ring flange water inlet in proper order, the container of keeping in, first solenoid valve, the measurement container, the second solenoid valve, the top of the container of keeping in is connected with the drainage funnel, and its bottom is connected with the one end of first solenoid valve, the top of measurement container is connected with the other end of first solenoid valve, and its bottom is connected with the one end of second solenoid valve, the outlet is connected with the other end of second solenoid valve, level sensor installs in the measurement container, single chip microcomputer control module fixed mounting is on equipment body inner wall, its with first solenoid valve, the second solenoid valve, level sensor and display screen electricity are connected, single chip microcomputer control module controls first solenoid valve according to the level sensor's that gathers data, opening and closing of second solenoid valve to and storage and demonstration flow data, first solenoid valve and second solenoid valve are opened and are closed in turn.

Preferably, the first electromagnetic valve (7) and the second electromagnetic valve (8) are alternately opened and closed, when the liquid level in the metering container rises to reach a first preset value, the singlechip control module (10) controls the first electromagnetic valve (7) to be closed, the second electromagnetic valve (8) is opened, when the liquid level in the metering container drops to reach a second preset value, the first electromagnetic valve (7) is opened, the second electromagnetic valve (8) is closed, when the liquid level in the metering container rises to the first preset value again, the first electromagnetic valve (7) is closed, the second electromagnetic valve (8) is opened, and the process is repeated.

Preferably, the resolution and the range of the flowmeter can be adjusted by changing the difference between the first preset value and the first preset value.

Preferably, the aperture of the second solenoid valve (8) is larger than the aperture of the first solenoid valve (7).

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the water flow to be measured is divided into set volumes in the metering container to be discharged through the alternate opening and closing of the first electromagnetic valve and the second electromagnetic valve, the opening and closing times of the second electromagnetic valve in unit time are recorded through the single chip microcomputer, and flow data are accurately obtained after data processing, so that the intermittent water flow to be measured without water pressure can be accurately measured, meanwhile, the leakage flow loss is small, the precision is high, manual participation is not needed, and automatic measurement is realized. The resolution and the maximum measuring range of the flowmeter are changed by modifying the difference value between the first preset value and the second preset value, so that the flowmeter is suitable for different flow requirements to be measured, and has a wide flexible application range. The aperture of the second electromagnetic valve is larger than that of the first electromagnetic valve, so that the problem of unsmooth drainage caused by sudden increase of water quantity can be prevented, and the drainage time interval can be shortened.

Drawings

FIG. 1 is a cross-sectional view showing an overall structure of a flowmeter for measuring leakage water of a generator of a hydraulic power plant according to the present invention;

FIG. 2 is a schematic view of an overall flowmeter for measuring leakage water from a hydroelectric power plant generator according to the present invention;

in the figure: 1. an equipment body; 2. a water inlet of the flange plate; 3. a drainage funnel; 4. a display screen; 5. a temporary storage container; 6. a metering container; 7. a first solenoid valve; 8. a second solenoid valve; 9. a water outlet; 10. a single chip microcomputer control module; 11. a liquid level sensor.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-2, a flowmeter for measuring leakage water of a hydroelectric power plant generator comprises

The device comprises a device body 1, a singlechip control module 10, a liquid level sensor 11, a flange plate water inlet 2 is fixedly installed at the top of the device body 1, a display screen 4 is installed on the surface of the device body 1, a water outlet 9 is installed at the bottom of the device body 1, a drainage funnel 3 connected with the flange plate water inlet, a temporary storage container 5, a first electromagnetic valve 7, a metering container 6 and a second electromagnetic valve 8 are sequentially installed inside the device body 1 from top to bottom, wherein the top of the temporary storage container 5 is connected with the drainage funnel 3, the bottom of the temporary storage container is connected with one end of the first electromagnetic valve 7, the top of the metering container 6 is connected with the other end of the first electromagnetic valve 7, the bottom of the metering container 6 is connected with one end of the second electromagnetic valve 8, the water outlet 9 is connected with the other end of the second electromagnetic valve 8, the single-chip microcomputer control module 10 is electrically connected with the first electromagnetic valve 7, the second electromagnetic valve 8, the liquid level sensor 11 and the display screen, controls the first electromagnetic valve 7 according to collected data of the liquid level sensor 11, controls the opening and closing of the second electromagnetic valve 8, stores and displays flow data, and alternately opens and closes the first electromagnetic valve 7 and the second electromagnetic valve 8.

Water flow is introduced from the flange water inlet 2, enters the temporary storage container 5 through the drainage funnel 3 and flows into the metering container 6 under the condition that the first electromagnetic valve is opened. When the water flow continuously flows in and the water level in the metering container 6 rises to the first preset value V1, the liquid level sensor feeds back the detected water level to the singlechip control module. The singlechip control module controls the first electromagnetic valve to be closed and the second electromagnetic valve to be opened. At this time, the measuring container 6 is communicated with the water outlet 9, water in the measuring container is discharged from the water outlet, and when the liquid level of the water drops to a second preset value V0, the liquid level is detected by the liquid level sensor and fed back to the singlechip control module. The singlechip control module controls the first electromagnetic valve to be opened and the second electromagnetic valve to be closed. At this time, the volume Δ V of water discharged in one time in the measuring container was equal to V1 to V0. And the singlechip control module alternately opens and closes the first electromagnetic valve and the second electromagnetic valve according to the received feedback signal of the liquid level sensor, and the process is repeated. The flow rate is then equal to the number of times the metering container drains per unit of time multiplied by the volume of water per time, Δ V, i.e.: q flow Δ V × N. And N is the opening times of the second electromagnetic valve in unit time and can be obtained by counting through the singlechip module.

In this embodiment, in order to adjust the resolution and the range of the flow meter to meet different measurement requirements, the first preset value and/or the second preset value may be adjusted in the single chip microcomputer control module, that is, the Δ V is changed, when the Δ V becomes smaller, the measurement resolution may be improved, and when the Δ V becomes larger, the measurement range may be increased.

In this embodiment, in order to facilitate smooth drainage and shorten the drainage time interval, the aperture of the second electromagnetic valve is larger than the aperture of the first electromagnetic valve

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a flowmeter for measuring percolating water of hydraulic power plant's generator which characterized in that: comprises that

The device comprises a device body (1), a single-chip microcomputer control module (10) and a liquid level sensor (11), wherein the top of the device body (1) is fixedly provided with a flange plate water inlet (2), the surface of the device body (1) is provided with a display screen (4), a water outlet (9) is arranged at the bottom of the device body (1), the interior of the device body (1) is from top to bottom, a drainage funnel (3) connected with the flange plate water inlet, a temporary storage container (5), a first electromagnetic valve (7), a metering container (6) and a second electromagnetic valve (8) are sequentially arranged, the top of the temporary storage container (5) is connected with the drainage funnel (3), the bottom of the temporary storage container is connected with one end of the first electromagnetic valve (7), the top of the metering container (6) is connected with the other end of the first electromagnetic valve (7), and the bottom of, the other end of outlet (9) and second solenoid valve (8) is connected, level sensor (11) are installed in measurement container (6), single chip microcomputer control module (10) fixed mounting is on equipment organism inner wall, its with first solenoid valve (7), second solenoid valve (8), level sensor (11) and display screen electricity are connected, single chip microcomputer control module (10) are according to the data of the level sensor (11) of gathering, control first solenoid valve (7), opening and closing of second solenoid valve (8) to and save and show flow data, first solenoid valve (7) and second solenoid valve (8) are opened and are closed in turn.

2. The flowmeter for measuring the water leakage of a hydroelectric power plant generator according to claim 1, wherein: the first electromagnetic valve (7) and the second electromagnetic valve (8) are alternately opened and closed, namely when the liquid level in the metering container rises to reach a first preset value, the singlechip control module (10) controls the first electromagnetic valve (7) to be closed, the second electromagnetic valve (8) is opened, when the liquid level in the metering container falls to reach a second preset value, the first electromagnetic valve (7) is opened, the second electromagnetic valve (8) is closed, and when the liquid level in the metering container rises to reach the first preset value again, the process is repeated.

3. A flowmeter for measuring the leakage water of a hydroelectric power plant generator according to claim 2, characterized in that: and adjusting the resolution and the range of the flowmeter by changing the difference value between the first preset value and the first preset value.

4. The flowmeter for measuring the water leakage of a hydroelectric power plant generator according to claim 1, wherein: the aperture of the second electromagnetic valve (8) is larger than that of the first electromagnetic valve (7).