CN103712669A - Flow gauge online calibration device - Google Patents

Abstract

The invention relates to a flow gauge online calibration device and belongs to the technical field of calibration device structures. The flow gauge online calibration device comprises a detection module, a collection module and an analysis module, wherein the detection module is used for detecting the state parameter of liquid inside a liquid mechanical output pipeline, the collection module is used for collecting the liquid mechanical output data, the analysis module is used for calculating the flow rate deviation between the detection module and the collection module, and the output end of the analysis module is connected with a display. The flow gauge online calibration device is reasonable in structure design, convenient to operate, capable of realizing online real-time calibration, and high in calibration precision.

Description

A flowmeter online calibration device

technical field

The invention relates to an online calibration device for a flowmeter, belonging to the technical field of calibration device structures.

Background technique

For fluid machinery with flow measurement requirements, the installed flowmeter should be regularly calibrated according to national standards, but the way of disassembly and inspection affects the normal use of the equipment, and the cycle is long, so there is an urgent need for devices and means that can carry out on-line calibration on site.

Contents of the invention

The purpose of the present invention is to solve the shortcomings of the above-mentioned prior art, and provide a flowmeter online calibration device with reasonable structure design, convenient operation, real-time online calibration, and high calibration accuracy.

The present invention is achieved through the following technical solutions:

A flowmeter online calibration device, which is special in that it includes a detection module for detecting the liquid state parameters in the output pipeline of the fluid machine 1, an acquisition module 5 for collecting the output data of the fluid machine 1, and a detection module for calculating and The analysis module 6 of the flow deviation of the collection module 5, the output end of the analysis module 6 is connected with the display 3;

A data transmission module 4 for transmitting data is provided between the detection module and the analysis module 6;

A data conversion module 7 is arranged between the acquisition module 5 and the analysis module 6;

The detection module includes a pressure sensor 8, a flow sensor 9, and a temperature sensor 10 arranged on the fluid mechanical output pipeline 2;

The flow sensor 9 includes a flow meter connected to the pipeline 2, and the flow meter is connected with a transmitter for converting the pulse signal into a current signal;

The flowmeter online calibration device is installed in the box, and the display 3 is horizontally installed on the upper surface of the box;

A shock absorbing device is installed on the inner wall of the box;

The collection module 5 includes a collection camera for photographing the measuring instrument of the fluid machine 1 , and the collection camera is connected with the data conversion module 7 through a data transmission line. the

The structure design of the flowmeter online calibration device of the present invention is reasonable, and the liquid flow, pressure and temperature information at the output end of the fluid machinery is collected through the detection module and transmitted to the analysis module by the data transmission module. The flow, pressure and temperature information are then sent to the analysis module for analysis and processing. The computer evaluates the measurement accuracy of the flow after performing calculations such as indication value interpretation and flow compensation, and gives a conclusion; in summary, the present invention can realize online Real-flow calibration can be conveniently connected in series in the working circuit of fluid machinery, and can be calibrated under the actual working conditions of fluid machinery. It has high calibration accuracy, avoids the disassembly of metering devices, and has the ability to obtain calibrated data non-invasively. The device obtains the metering data of the fluid machinery through image acquisition and processing, without changing any working state of the fluid machinery, and without affecting the normal operation of the fluid machinery.

Description of drawings

Figure 1: Schematic diagram of the structure of a flowmeter online calibration device of the present invention.

Detailed ways

The specific embodiments of the present invention are given below with reference to the accompanying drawings, which are used to further describe the present invention.

Example 1

An online flowmeter calibration device in this embodiment includes a detection module for detecting the liquid state parameters in the output pipeline of the fluid machine 1, an acquisition module 5 for collecting the output data of the fluid machine 1, and a detection module for calculating and collecting The analysis module 6 of module 5 flow deviations, the output end of analysis module 6 is connected with display 3; Be provided with the data transmission module 4 that is used to transmit data between detection module and analysis module 6; Set up between acquisition module 5 and analysis module 6 There is a data conversion module 7; the detection module includes a pressure sensor 8, a flow sensor 9, and a temperature sensor 10 arranged on the output pipeline 2 of the fluid machine, and the flow sensor 9 includes a flowmeter connected to the pipeline 2, and the flowmeter is connected to There are transmitters for converting pulse signals into current signals. The output end of the pipeline 2 is connected with the liquid storage tank 11; the flowmeter online calibration device is installed in the box, and the display 3 is installed horizontally on the upper surface of the box; a shock absorbing device is installed on the inner wall of the box; the acquisition module 5 It includes a collection camera for photographing the measuring instrument of the fluid machine 1, and the collection camera is connected with the data conversion module 7 through a data transmission line. the

The working process is as follows: the detection module collects the liquid flow, pressure and temperature information at the output end of the fluid machine and is transmitted from the data transmission module 4 to the analysis module 6. At the same time, the acquisition module 5 also synchronously collects the flow rate, pressure and temperature indicated by the measuring instrument of the fluid machine 1. The temperature information is then sent to the analysis module 6 for analysis and processing, and the computer evaluates the measurement accuracy of the flow rate and gives a conclusion after performing calculations such as indication value interpretation and flow compensation.

The flowmeter online calibration device of this embodiment has the following advantages:

1) It has a portable structure, is flexible, easy to carry and transport, and is designed with a shock-absorbing structure, which is highly adaptable to site conditions;

2) It can realize online real-flow calibration. The device can be conveniently connected in series in the calibrated working circuit, and can be calibrated under the actual working conditions of fluid machinery. The calibration accuracy is high, and the disassembly of the metering device is avoided;

3) It has the ability to obtain the calibrated data non-invasively. The device obtains the measurement data of the fluid machinery through image acquisition and processing, without changing any working status of the fluid machinery, and without affecting the normal operation of the fluid machinery;

4) It has the ability to automatically correct the influence of temperature and pressure on the flow rate. Through software design, the device has established a correction model for the influence of temperature and pressure on the flow measurement accuracy, which can be automatically corrected to avoid temperature or pressure caused by fluid machinery. deviation.

Claims (8)

1. A flowmeter online calibration device, characterized in that it includes a detection module for detecting the liquid state parameters in the output pipeline of the fluid machine (1), an acquisition module (5) for collecting the output data of the fluid machine (1), The analysis module (6) is used to calculate the flow deviation between the detection module and the acquisition module (5), and the output terminal of the analysis module (6) is connected to the display (3). 2. The flowmeter online calibration device according to claim 1, characterized in that a data transmission module (4) for transmitting data is provided between the detection module and the analysis module (6). 3. The flowmeter online calibration device according to claim 1, characterized in that a data conversion module (7) is provided between the acquisition module (5) and the analysis module (6). 4. A flowmeter online calibration device according to claim 2, characterized in that the detection module includes a pressure sensor (8), a flow sensor (9), a temperature sensor (10). 5. A flowmeter online calibration device according to claim 4, characterized in that the flow sensor (9) includes a flowmeter connected to the pipeline (2), and the flowmeter is connected with a device for converting the pulse signal into Transmitters for current signals. 6. A flowmeter online calibration device according to claim 1, characterized in that the flowmeter online calibration device is installed in the box, and the display (3) is installed horizontally on the upper surface of the box. 7. A flowmeter online calibration device according to claim 6, characterized in that a shock absorbing device is installed on the inner wall of the box. 8. A flowmeter online calibration device according to claim 1, characterized in that the acquisition module (5) includes an acquisition camera for photographing the measuring instrument of the fluid machine (1), and the acquisition camera converts the data through the data transmission line modules (7) are connected.

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