CN210180496U

CN210180496U - Flow rate measuring device

Info

Publication number: CN210180496U
Application number: CN201921073617.0U
Authority: CN
Inventors: Zhenghua Zhao; 赵正华; Zilong Dai; 戴子龙; Fudi Dong; 董富弟; Hui Yu; 于慧
Original assignee: SEC-KSB NUCLEAR PUMPS & VALVES Co Ltd
Current assignee: SEC-KSB NUCLEAR PUMPS & VALVES Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-03-24
Anticipated expiration: 2029-07-10

Abstract

The utility model belongs to the technical field of measure, a flow measuring device is disclosed, for improving the problem design of pipeline flow measurement difficulty in the power station system. The flow measuring device comprises a device body provided with an accommodating cavity, a measuring body arranged in the accommodating cavity and a calibrated flow measuring assembly, wherein the measuring body is provided with a measuring cavity and a water outlet throttling hole communicated with the measuring cavity; the device body is provided with a water inlet channel and a water drainage channel, the water inlet channel is used for communicating the pipeline to be measured with the measuring cavity, the water drainage channel is communicated with the water outlet throttling hole, and water flowing out of the water outlet throttling hole can be discharged through the water drainage channel; the measuring end of the flow measuring component is inserted into the measuring cavity, and the flow measuring component can measure the flow data of the water inlet channel according to the stable liquid level in the measuring cavity. The utility model discloses flow measuring device is used for the measurement of flow.

Description

Flow rate measuring device

Technical Field

The utility model relates to a measure technical field, especially relate to a flow measuring device.

Background

In the prior art, when the flow rate of fluid in a measuring pipeline needs to be measured, an electromagnetic flow meter is generally used for measurement. However, when the background is used for measuring the flow of a small pipeline in a power station system, the background is limited by the characteristics of a fluid medium (deionized water is not conductive), and the conventional electromagnetic flowmeter cannot be used for measuring, so that the flow measurement becomes a great problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flow measuring device to improve the problem of the difficult flow measurement of pipeline in the power station system among the prior art.

To achieve the purpose, the utility model adopts the following technical proposal:

a flow measuring device comprises a device body provided with a containing cavity, a measuring body arranged in the containing cavity and a calibrated flow measuring assembly, wherein the measuring body is provided with a measuring cavity and a water outlet throttling hole communicated with the measuring cavity; the device body is provided with a water inlet channel and a water drainage channel, the water inlet channel is used for communicating a pipeline to be measured with the measuring cavity, the water drainage channel is communicated with the water outlet throttle hole, and water flowing out of the water outlet throttle hole can be discharged through the water drainage channel;

the measuring end of the flow measuring component is inserted into the measuring cavity, and the flow measuring component can measure the flow data of the water inlet channel according to the stable liquid level height in the measuring cavity.

Preferably, a communication port of the water inlet channel and the measuring cavity is higher than the water outlet orifice, and/or the sizes of the water inlet channel and the communication port are larger than the size of the water outlet orifice.

Preferably, the device body comprises a shell and a cover body, the top end of the shell is open, and the cover body is arranged at the open end of the shell and fixedly connected with the shell; the drainage channel is arranged at the bottom end of the shell.

Preferably, the water inlet channel is arranged on the cover body.

Preferably, a sealing ring is included; the top end of the shell is provided with an installation groove, the sealing ring is embedded in the installation groove, and the bottom end of the cover body is tightly abutted to the sealing ring; or, the bottom of lid is provided with the mounting groove, the sealing washer inlays to be located in the mounting groove, the top of casing with the inseparable butt of sealing washer.

Preferably, the outer wall of the measuring body is provided with a lap joint part, the shell is provided with a supporting part corresponding to the lap joint part, and the measuring body is arranged in the accommodating cavity through the lap joint part and the supporting part.

Preferably, the lap joint part comprises a flange arranged at the top end of the measuring body, the supporting part comprises a supporting surface at the top end of the shell, and the flange is lapped with the supporting surface.

Preferably, a gap is provided between the top end of the measuring body and the top wall of the lid body.

Preferably, the water outlet throttle hole is arranged on the side wall of the measuring body and close to the bottom of the measuring body; and/or the top end of the measuring body is open, and the water inlet channel is communicated with the top end of the measuring body.

Preferably, the water outlet orifice is communicated with the accommodating cavity; the bottom end of the measuring body is abutted to the bottom wall of the device body, a first channel and a second channel are arranged at the bottom end of the measuring body, the first channel is communicated with the accommodating cavity, and the second channel is communicated with the first channel and the drainage channel.

Preferably, the measuring body is a hollow cylindrical structure with an open top end, the first channel extends in the diameter direction at the bottom end of the measuring body, and the axis of the second channel coincides with the axis of the drainage channel.

The utility model has the advantages that:

the utility model provides a flow measuring device is including being provided with the device body that holds the chamber and setting up in the measurement body that holds the chamber, the measurement body have the measurement chamber and with the play water orifice that measures the chamber intercommunication. The device body is provided with a water inlet channel and a water drainage channel, the water inlet channel is communicated with the pipeline to be measured and the measurement cavity, so that liquid in the pipeline to be measured can enter the measurement cavity; the liquid entering from the water inlet channel can be accumulated in the measuring cavity, the measuring end of the flow measuring component is inserted in the measuring cavity, and the flow measuring component calibrated in advance can measure the flow data of the water inlet channel according to the stable liquid level height in the measuring cavity. Make and use the utility model provides a during flow measuring device, the measurement of flow does not rely on the electromagnetic type flowmeter, even the medium in the pipeline that awaits measuring is the deionized water, also can measure the flow of awaiting measuring in the measuring pipeline, can improve the problem of the pipeline flow measurement difficulty among the prior art in the power station system.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a flow rate measurement device provided by the present invention;

fig. 2 is a cross-sectional view of the flow rate measurement device provided by the present invention.

In the figure:

1-the device body; 11-a water inlet channel; 12-a drainage channel; 13-a housing; 131-a mounting groove; 14-a cover body;

2-a measurement volume; 21-outlet orifice; 22-a first channel; 23-a second channel;

3-flow measurement assembly.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Referring to fig. 1 and fig. 2, the flow measuring device provided in this embodiment includes a device body 1 having an accommodating cavity, a measuring body 2 disposed in the accommodating cavity, and a calibrated flow measuring assembly 3, wherein the measuring body 2 has a measuring cavity and a water outlet orifice 21 communicated with the measuring cavity; the device body 1 is provided with a water inlet channel 11 and a water outlet channel 12, the water inlet channel 11 is used for communicating a pipeline to be measured with a measurement cavity, the water outlet channel 12 is communicated with a water outlet orifice 21, and water flowing out of the water outlet orifice 21 can be discharged through the water outlet channel 12 (the water outlet orifice 21 can be higher than the water outlet channel 12); the measuring end of the flow measuring component 3 is inserted into the measuring cavity, and the flow measuring component 3 can measure the flow data of the water inlet channel 11 according to the stable liquid level height in the measuring cavity.

The water inlet channel 11 of the flow measuring device provided by the embodiment is communicated with the pipeline to be measured and the measuring cavity, so that liquid in the pipeline to be measured can enter the measuring cavity; liquid entering the water inlet channel 11 can be accumulated in the measuring cavity, the measuring end of the flow measuring component 3 is inserted into the measuring cavity, and the flow measuring component 3 calibrated in advance can display flow data of the water inlet channel 11 according to the stable liquid level height in the measuring cavity. When the flow measuring device provided by the embodiment is used, the flow measurement does not depend on an electromagnetic flowmeter, even if the medium in the pipeline to be measured is deionized water, the flow in the pipeline to be measured can be measured, and the problem of difficulty in measuring the flow of the pipeline in a power station system in the prior art can be solved.

In addition, the flow measuring device provided by this embodiment converts the flow measurement of the pipeline to be measured into the flow measurement at the water outlet orifice 21 on the measuring body 2, can convert the flow measurement of the liquid discontinuously flowing in the pipeline to be measured into the flow measurement of the liquid continuously flowing at the water outlet orifice 21, and can better reflect the flow condition of the water leakage leading-out pipeline when the pipeline to be measured is the shaft seal water leakage leading-out pipeline of the power station system.

Alternatively, the flow measurement assembly 3 may comprise a liquid level meter, and the calibration process of the flow measurement assembly 3 may be as follows:

water is introduced into the measuring chamber from the water inlet channel 11 at a known flow rate, and initially the liquid level in the measuring chamber is lower than the water outlet orifice 21, so that water accumulates in the measuring chamber and the liquid level rises, and when the water level exceeds the water outlet orifice 21, there is a flow overflow (overflow water flows through the drain channel 12 to the downstream pipe), but the water inlet flow rate in the measuring chamber (i.e. the flow rate of the water inlet channel 11, which is known) is still greater than the water outlet flow rate (i.e. the flow rate at the water outlet orifice 21), so that the liquid level in the measuring chamber will continue to rise. Along with the rising of the liquid level in the measuring cavity, the hydraulic pressure at the position of the water outlet throttle hole 21 is increased, the water outlet flow of the measuring cavity is increased along with the hydraulic pressure, but is still smaller than the water inlet flow, and the liquid level in the measuring cavity still continues to rise at the moment; when the water outlet flow in the measuring cavity is increased to be equal to the water inlet flow, the liquid level in the measuring cavity reaches dynamic balance and is kept at a certain height. At the moment, the stabilized liquid level height value is marked to correspond to the known inflow water flow value at the moment;

by analogy, the flow rate of the water entering from the water inlet channel 11 (the flow rate is also known) is changed, and through the process, a new stable liquid level height can be obtained in the final measurement cavity, and the new stable liquid level height value can be calibrated to correspond to the new known water inlet flow rate value.

Repeating the above process to obtain a corresponding table of the height value of the stable liquid level and the inflow flow value, thereby completing the calibration of the liquid level in the measuring cavity and placing the corresponding table in the liquid level meter.

As an alternative, the inflow rate of water in the measurement cavity may be unknown, and when the liquid level height in the measurement cavity is stable, the outflow rate of water in the measurement cavity is obtained by downstream measurement, and finally a table of the stable liquid level height value and the inflow rate value is obtained.

During actual measurement, after the water of unknown flow got into the measurement chamber, the liquid level in the measurement chamber finally can be stabilized at a height, can read out the inflow flow this moment according to the corresponding relation of the inflow flow of demarcation and liquid level.

Preferably, in this embodiment, the communication port between the water inlet channel 11 and the measurement chamber is higher than the water outlet orifice 21, and the size (cross-sectional area) of both the water inlet channel 11 and the communication port is larger than the size (cross-sectional area) of the water outlet orifice 21.

The device body 1 comprises an accommodating cavity and is provided with a water inlet channel 11 and a water outlet channel 12, optionally, the device body 1 comprises a shell 13 with an open top end and a cover body 14 covering the open end of the shell 13, and the shell 13 is fixedly connected with the cover body 14 to jointly enclose the accommodating cavity. The drain passage 12 is provided at the bottom end of the housing 13, and the water inlet passage 11 is provided on the cover 14. The flow measuring assembly 3 passes through the cover 14, and is hermetically and fixedly connected with the cover 14.

Specifically, the housing 13 and the cover 14 may be detachably connected by bolts, so that the installation and maintenance of the measuring body 2 are facilitated.

The drainage channel 12 is communicated with the water outlet orifice 21, water flowing out of the water outlet orifice 21 can be discharged through the drainage channel 12, in order to increase the height of the measuring cavity as much as possible and further increase the measuring range of the flow measuring device, the water outlet orifice 21 can be communicated with the accommodating cavity, the bottom end of the measuring body 2 is abutted to the bottom wall of the device body 1, a first channel 22 communicated with the accommodating cavity and a second channel 23 communicating the first channel 22 with the drainage channel 12 are arranged at the bottom end of the measuring body 2, namely, the water flowing out of the water outlet orifice 21 firstly enters the first channel 22 through the accommodating cavity and then flows to the drainage channel 12 through the second channel 23.

Preferably, the measuring body 2 is a hollow cylindrical structure with an open top end (the measuring body 2 is open at the top end, so that no pressure is accumulated in the measuring cavity, and the collected liquid can be directly led out from the drainage channel 12), the first channel 22 extends along the diameter direction at the bottom end of the measuring body 2, and the axis of the second channel 23 is coincident with the axis of the drainage channel 12. Further, the axis of the receiving chamber may coincide with both the axis of the drain passage 12 and the axis of the second passage 23.

Alternatively, there may be a gap between the bottom end of the measuring body 2 and the bottom wall of the apparatus body 1, and the water outlet orifice 21 communicates with the drain passage 12 through the accommodation chamber.

In order to ensure the sealing performance between the casing 13 and the cover 14, a sealing ring may be disposed at a joint between the casing 13 and the cover 14, specifically, an installation groove 131 may be disposed at the top end of the casing 13, the sealing ring is embedded in the installation groove 131, and the bottom end of the cover 14 is tightly abutted to the sealing ring; the bottom end of the cover 14 may also be provided with an installation groove 131, the sealing ring is embedded in the installation groove 131, and the top end of the housing 13 is tightly abutted to the sealing ring.

In order to avoid the influence of the measuring body 2 on the sealing property between the case 13 and the lid 14, a gap is provided between the top end of the measuring body 2 and the top wall of the lid 14.

The measuring body 2 is arranged in the accommodating cavity of the device body 1, and for the convenience of arrangement of the measuring body 2 in the accommodating cavity, the outer wall of the measuring body 2 can be provided with the overlapping part, the shell 13 is provided with a supporting part corresponding to the overlapping part, and the overlapping part is overlapped on the supporting part, so that the measuring body 2 is arranged in the accommodating cavity. Specifically, the lap joint portion may include a flange provided on the top end of the measuring body 2, and the support portion may include a support surface on the top end of the housing 13, and the measuring body 2 is disposed in the accommodating cavity through lap joint of the flange and the support surface. Of course, as an alternative, the overlapping part may be a bump or a support bar or the like disposed at intervals on the outer periphery of the top end of the measuring body 2.

The measuring body 2 is provided with a measuring cavity and a water outlet throttling hole 21 communicated with the measuring cavity, the water inlet channel 11 on the device body 1 is communicated with the measuring cavity, preferably, the water outlet throttling hole 21 is arranged on the side wall of the measuring body 2 and is close to the bottom of the measuring body 2, the top end of the measuring body 2 is open, and the water inlet channel 11 is communicated with the top end of the measuring body 2.

The flow measuring device provided by the embodiment considers a certain degree of built-in damping during design, and when a pipeline to be measured is a shaft seal pump leakage water leading-out pipeline in a power station system, transient peak leakage cannot fill the measuring body 2, so that a high flow signal cannot be generated. And reasonable measuring range and damping characteristic can be established by reasonably selecting the volume of the measuring body 2 and the aperture of the water outlet throttling hole 21 through experiments.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A flow measuring device, characterized by comprising a device body (1) provided with a containing cavity and a measuring body (2) arranged in the containing cavity, and a calibrated flow measuring assembly (3), wherein the measuring body (2) is provided with a measuring cavity and a water outlet orifice (21) communicated with the measuring cavity; the device body (1) is provided with a water inlet channel (11) and a water outlet channel (12), the water inlet channel (11) is used for communicating a pipeline to be measured with the measuring cavity, the water outlet channel (12) is communicated with the water outlet throttle hole (21), and water flowing out of the water outlet throttle hole (21) can be discharged through the water outlet channel (12);

the measuring end of the flow measuring component (3) is inserted into the measuring cavity, and the flow measuring component (3) can measure the flow data of the water inlet channel (11) according to the stable liquid level in the measuring cavity.

2. Flow measuring device according to claim 1, characterized in that the communication opening of the water inlet channel (11) with the measuring chamber is higher than the water outlet orifice (21) and/or that the dimensions of the water inlet channel (11) and the communication opening are larger than the dimensions of the water outlet orifice (21).

3. The flow measuring device according to claim 1, wherein the device body (1) comprises a housing (13) and a cover body (14), the top end of the housing (13) is open, and the cover body (14) is arranged at the open end of the housing (13) and is fixedly connected with the housing (13); the drainage channel (12) is arranged at the bottom end of the shell (13).

4. A flow measuring device according to claim 3, characterized in that the water inlet channel (11) is provided on the cover (14).

5. A flow measuring device according to claim 3, comprising a sealing ring; the top end of the shell (13) is provided with an installation groove (131), the sealing ring is embedded in the installation groove (131), and the bottom end of the cover body (14) is tightly abutted to the sealing ring; or the bottom end of the cover body (14) is provided with a mounting groove (131), the sealing ring is embedded in the mounting groove (131), and the top end of the shell (13) is tightly abutted to the sealing ring.

6. A flow measuring device according to claim 3, characterized in that the outer wall of the measuring body (2) is provided with a lap joint, the housing (13) is provided with a support corresponding to the lap joint, and the measuring body (2) is disposed in the housing chamber through the lap joint and the support.

7. A flow measuring device according to claim 6, characterized in that the overlap comprises a flange arranged at the top end of the measuring body (2), and the support comprises a support surface at the top end of the housing (13), which flange overlaps the support surface.

8. Flow measuring device according to any of claims 3-7, characterized in that the outlet orifice (21) is arranged in the side wall of the measuring body (2) near the bottom of the measuring body (2); and/or the top end of the measuring body (2) is open, and the water inlet channel (11) is communicated with the top end of the measuring body (2).

9. Flow measuring device according to any of claims 3 to 7, characterized in that the outlet orifice (21) communicates with the receiving chamber; the bottom end of the measuring body (2) is abutted to the bottom wall of the device body (1), a first channel (22) and a second channel (23) are arranged at the bottom end of the measuring body (2), the first channel (22) is communicated with the containing cavity, and the second channel (23) is communicated with the first channel (22) and the drainage channel (12).

10. A flow measuring device according to claim 9, characterized in that the measuring body (2) is a hollow cylindrical structure with an open top end, the first channel (22) extending diametrically at the bottom end of the measuring body (2), the axis of the second channel (23) coinciding with the axis of the drain channel (12).