CN218511808U

CN218511808U - Liquid flow measuring system

Info

Publication number: CN218511808U
Application number: CN202220481407.0U
Authority: CN
Inventors: 吴世平; 吴伟平
Original assignee: Guangdong Changxin Precision Equipment Co Ltd
Current assignee: Guangdong Changxin Precision Equipment Co Ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2023-02-21
Anticipated expiration: 2032-03-08

Abstract

The utility model relates to a flow measurement technical field discloses a liquid flow measurement system, and it includes the liquid container of rule, sets up liquid inlet, liquid outlet and level measurement device on the liquid container, and flow measurement system still includes controller, controller and level measurement device signal connection. The utility model abandons the traditional mode of installing a flow sensor to measure the flow, adopts the liquid level measuring device to monitor the liquid level in the liquid container in real time, and can quickly feed back liquid flow data by performing related calculation through the controller, thereby avoiding the direct contact between the liquid level measuring device and the liquid and avoiding the pollution to the liquid; because of the liquid level measurement device need not contact liquid, consequently the measuring system of this application can not receive influences such as the viscosity, the pH value of liquid, corrosivity, guarantees measuring result's accuracy.

Description

Liquid flow measuring system

Technical Field

The utility model relates to a flow measurement technical field specifically, relates to a liquid flow measurement system, especially a liquid flow measurement system suitable for food industry or chemical industry.

Background

In the fields of conventional food and chemical canning and wastewater collection and treatment, a flow sensor is usually arranged on a corresponding pipeline inlet and outlet for measuring liquid flow, and the liquid flow drives a measuring floater of the flow sensor to rotate so as to obtain corresponding flow data. This conventional flow measurement method has the following disadvantages:

1. the measured liquid must contact with components such as a flow sensor, and the sensor is corroded when the liquid has acidity or alkalinity, so that the service life of the sensor is influenced; because the sensor is in direct contact with liquid, the liquid raw materials can be polluted, and therefore the requirements on the material of the sensor are high;

2. the viscosity of liquid is different under different process conditions, and the rotating frequency of the floaters of the flow sensors is different, so that the flow data is abnormal;

3. the flow sensor must be installed at the position of a liquid inlet and a liquid outlet of the pipe, corresponding data can be obtained only by the flowing of liquid, and in addition, certain difficulty is brought to later maintenance due to the installation specificity;

4. because the flow floater is directly contacted with the measuring object, the flow data is greatly fluctuated when the pressure fluctuation occurs on the measuring object, and a false alarm can be triggered when the pressure fluctuation occurs on the measuring object is serious.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming prior art's defect, provides one kind and need not to contact measuring fluid and can survey the measurement system who corresponds liquid flow fast, and measurement system does not receive the influence of performance such as density, consistency, acid-base corrosion attribute of the liquid of surveying.

The utility model discloses the purpose is realized through following technical scheme:

a liquid flow measuring system comprises a regular liquid container, wherein a liquid inlet, a liquid outlet and a liquid level measuring device are arranged on the liquid container, and the liquid level measuring device is arranged above the liquid level of liquid entering the liquid container; the flow measuring system also comprises a controller in signal connection with the liquid level measuring device.

Further, the liquid flows into the liquid inlet through the inflow valve, and the controller is in signal connection with the inflow valve.

Further, the flow measuring system also comprises an outflow valve arranged on the liquid outlet side, and the controller is in signal connection with the outflow valve.

Further, the liquid inlet is arranged at the bottom of the liquid container.

Still further, the flow measurement system includes a supply pump through which the liquid is pumped to the liquid inlet.

Further, the liquid level measuring device is a distance measuring sensor.

Further, the liquid level measuring device is a liquid level meter.

Further, the level gauge is a radar level gauge.

Further, the controller is a PLC controller.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) The flow measuring system of the utility model abandons the traditional mode of installing a flow sensor to measure the flow, adopts a liquid level measuring device to monitor the liquid level in the liquid container in real time, can quickly feed back liquid flow data by carrying out related calculation through a controller, avoids the direct contact of the liquid level measuring device and the liquid, and can not cause pollution to the liquid;

2) The liquid level measuring device of the flow measuring system of the utility model does not need to contact liquid, is not influenced by the viscosity, the pH value, the corrosivity and the like of the liquid, and can effectively ensure the accuracy of the measuring result;

3) The liquid level measuring device monitors the liquid level in the liquid container in real time, and can effectively prevent the occurrence of the conditions of material overflow or material shortage evacuation and the like.

Drawings

Fig. 1 is a schematic structural view of a liquid flow rate measurement system described in embodiment 1.

Detailed Description

The invention will be further described with reference to specific embodiments, wherein the drawings are designed solely for the purpose of illustration and not as a definition of the limits of the patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

The liquid flow measuring system shown in fig. 1 comprises a regular liquid container 1, wherein a liquid inlet, a liquid outlet and a liquid level measuring device 2 are arranged on the liquid container 1, the liquid level measuring device is arranged above the liquid level of liquid entering the liquid container, and the liquid level measuring device is not contacted with the liquid; flow measurement system still includes controller (not shown), and 2 signal connection of controller and liquid level measurement device, and distance measuring sensor is chooseed for use to liquid level measurement device 2 in this embodiment, and the controller is the PLC controller, and distance measuring sensor sets up at the liquid container top.

Wherein, liquid flows into the liquid inlet through an inflow valve 3, in order to avoid the liquid to produce great fluctuation when flowing into the liquid container and influence the measurement accuracy of liquid level measurement device, preferably set up the liquid inlet in the liquid container bottom, still can set up a feed pump 4 this moment and assist the transport liquid material, feed pump 4 can provide sufficient head, makes liquid by high-efficient pump sending to inflow valve 3 department to finally pour into in the liquid container 1 smoothly.

The liquid outlet side of the liquid container 1 is provided with an outflow valve 5, and when the outflow valve 5 is opened, the liquid in the liquid container 1 starts the discharge process.

Specifically, the bottom area data and the volume data V1 of the liquid container 1 are known data and stored in a controller, the controller is further designed with a timing function, and the measurement process of the measurement system is as follows: closing the outflow valve 5, opening the feed pump 4 and the inflow valve 3, starting timing, starting liquid flowing into the liquid container 1, measuring the distance from the top of the liquid container 1 to the surface of the liquid by using the distance measuring sensor in time units and feeding the distance to the controller, and calculating the non-liquid volume V2 by the controller, wherein the flow rate of the flowing liquid is = (the liquid container volume V1-the non-liquid volume V2)/the unit time T, namely the liquid flow rate F = (V1-V2)/T. This measure of the inflow rate is often applied to the collection metering of the liquid material flow rate and can be derived from a set interlock threshold depending on the liquid container size, by closing the feed pump 4 and the inflow valve 3 when the non-liquid volume V2=0 or V2 approaches the set threshold to prevent excessive liquid level overflow.

Similarly, the outflow rate is calculated by closing the supply pump 4 and the inflow valve 3 and opening the outflow valve 5. This way of measuring the outflow can be applied to the dosing of liquid material to a down-flow plant or production line, and the outflow valve 5 can be closed when V2= V1 or V2 equals a set threshold value, preventing the liquid level empty discharge from affecting the data accuracy.

In order to further improve the automation performance of the measuring system, the controller can be in signal connection with the inflow valve 3 and the outflow valve 5 respectively, and the controller indicates the opening and closing operations of the inflow valve 3 and the outflow valve 5, so that the high-efficiency and accurate measurement process is realized.

Because the measuring system carries out time-sharing measurement on the inflow flow and the outflow flow, the inflow valve 3 is opened and the outflow valve 5 is closed when the inflow flow is measured; when the outflow rate is measured, the inflow valve 3 is closed and the outflow valve 5 is opened.

Example 2

The difference between this example and example 1 is: the level measuring device is a level gauge, more preferably a radar level gauge.

The measuring system does not need to be provided with a flow sensor, corresponding flow data can be calculated through liquid level and volume measurement, and the measuring process does not need to be in contact with liquid, so that the flow measurement is not influenced by factors such as sensor corrosion, pressure/air existing in a pipeline and the like. Meanwhile, the liquid level can be monitored in real time, and overflow or material shortage evacuation can be prevented.

The liquid level measuring device is convenient to install and can be directly installed on the top of the container without matching a corresponding pipeline interface like a pipeline flowmeter; in addition, compared with the existing pipeline flowmeter, the pipeline flowmeter has stronger adaptability, and can adapt to the measurement of the flow of liquids with different viscosities, acid and alkali corrosivity and the like.

It should be understood that the above-mentioned embodiments are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. 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 liquid flow measurement system is characterized by comprising a regular liquid container, wherein a liquid inlet, a liquid outlet and a liquid level measurement device are arranged on the liquid container, and the liquid level measurement device is arranged above the liquid level of liquid entering the liquid container; the flow measuring system also comprises a controller which is in signal connection with the liquid level measuring device; the liquid level measuring device is a distance measuring sensor or a radar liquid level meter;

an inflow valve is arranged at the liquid inlet, and the controller is in signal connection with the inflow valve;

the flow measuring system also comprises an outflow valve arranged on the liquid outlet side, and the controller is in signal connection with the outflow valve.

2. The liquid flow measurement system of claim 1, wherein the liquid inlet is disposed at a bottom of a liquid container.

3. The liquid flow measurement system of claim 1, wherein the flow measurement system comprises a supply pump through which liquid is pumped to the liquid inlet.

4. The liquid flow measurement system of claim 1, wherein the controller is a PLC controller.