Electromagnetic flowmeter suitable for multiple media and multiple working conditions

Abstract

The utility model relates to an electromagnetic flowmeter suitable for multiple media and multiple working conditions. Comprising a conductor pipeline, an electromagnetic probe, a converter and a radar liquid level meter, and the radar liquid level meter is arranged on the conductor pipeline and emits electromagnetic waves to the liquid level in the conductor pipeline; and an electric signal reflected from the liquid level is captured and processed, and then is connected with the converter through the electric signal, so that the flow data can be measured and calculated through the liquid level height and the flow value signal. According to the electromagnetic flow meter suitable for multiple media and multiple industrial mines, the high-precision radar liquid level meter and the electromagnetic flow meter are combined, the application scene of the electromagnetic flow meter is expanded, and the problem of flow measurement of conducting media of an open type pipeline or a non-full closed pipeline is solved; and the construction cost of forcibly required full pipes and the inconvenience of civil engineering in the traditional pipeline process are greatly reduced and saved, so that the investment cost of measuring points can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of measuring equipment, in particular to a pipeline measuring technology, and specifically to an electromagnetic flow meter suitable for multiple media and multiple working conditions. Background Art

[0002] For liquid pipelines in the field of industrial production, it is usually necessary to measure the flow rate of the liquid flowing through them.

[0003] Nowadays, for cost considerations, electromagnetic flowmeters based on the principle of electromagnetic induction are commonly used to measure the flow of liquid in pipelines. This type of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction, that is, in the electromagnetic flowmeter, the conductive medium in the measuring tube is equivalent to the conductive metal rod in the Faraday experiment. When the two electromagnetic coils at the upper and lower ends generate a constant magnetic field, the conductive medium flowing through will generate an induced voltage. The two electrodes inside the pipeline will measure this induced voltage and then deduce the flow rate.

[0004] However, there is also a problem with the above electromagnetic flowmeter, that is, it requires the measured pipe to remain in a "full pipe" state (that is, the radial cross-section of the pipe remains constant) in order to accurately calculate the flow rate of the liquid. This requirement makes it impossible for pipes under certain working conditions (such as municipal rainwater pipes and sewage pipes) to meet its measurement requirements.

[0005] At present, in order to overcome the above-mentioned "full pipe" problem, the traditional approach is to increase the construction cost of the entire pipeline or pipe section to make it meet the "full pipe" requirement of the electromagnetic flowmeter. Alternatively, there is also a process on the market that changes the internal structure of the electromagnetic flowmeter to constantly determine the liquid level in the relevant pipe section and then perform flow measurement. However, this approach of changing the internal structure of the electromagnetic flowmeter will increase the production and manufacturing cost of the electromagnetic flowmeter, and due to the complex structure, the reliability of the electromagnetic flowmeter will also decrease. Summary of the invention

[0006] The purpose of the utility model is to overcome the above defects and to provide an electromagnetic flowmeter suitable for multiple media and multiple industries and mines, which has a simple and reliable structure, high measurement accuracy and does not require complex modifications to the electromagnetic flowmeter or pipe sections.

[0007] In order to achieve the above object, the utility model is achieved as follows:

[0008] An electromagnetic flowmeter suitable for multiple media and multiple working conditions, including a conductor pipe, an electromagnetic probe, a sensor and a converter, wherein the conductor pipe refers to a channel for fluid flow, and when the fluid passes through the pipe, the velocity and the magnetic field of the fluid will generate an induced electromotive force; the electromagnetic probe is arranged on the wall of the conductor pipe, and is used to detect the induced electromotive force in the magnetic field; the sensor is arranged behind the electromagnetic probe, and is used to receive the induced electromotive force of the electromagnetic probe, convert it into an electrical signal, and amplify and process the signal to provide an accurate flow value; the converter is used to amplify the induced potential signal and convert it into a unified standard signal; and also includes a radar level meter, wherein the radar The radar level meter is arranged on the wall of the conductor pipe, and includes a transmitting device, a receiving device, a signal processor and an antenna, wherein the antenna is used as an interface between the radar level meter and the external environment, and is used to guide the electromagnetic waves from the transmitting device to the measured container, and is also responsible for receiving the reflected electromagnetic waves; the transmitting device transmits electromagnetic waves to the liquid surface in the conductor pipe through the antenna; the receiving device is used to capture the electromagnetic waves reflected from the liquid surface and convert them into electrical signals; the signal processor processes the electrical signals received by the receiving device and calculates the liquid level, and the signal processor is also connected to the converter through electrical signals, so as to calculate the flow data through the liquid level and the flow numerical signal.

[0009] The electromagnetic flowmeter suitable for multiple media and multiple working conditions also includes a junction box, which is used to accommodate the converter and is provided with a data line connector for transmitting the data or signal of the converter to the outside world via the data line.

[0010] Furthermore, in the electromagnetic flowmeter applicable to multiple media and multiple working conditions, the conductor pipe is made of metal material, including any one of 316L stainless steel, carbon steel, and cast iron.

[0011] The electromagnetic flowmeter suitable for multiple media and multiple industries and mines proposed by the utility model adopts a combination of a high-precision radar level meter and an electromagnetic flowmeter, which expands the application scenarios of the electromagnetic flowmeter and solves the flow measurement problem of conductive media in open pipelines (open channels, rivers) or partially closed pipelines (circular pipes, rectangles); it greatly reduces and saves the construction cost and civil engineering inconvenience of the traditional pipeline process that requires full pipes, thereby significantly reducing the investment cost of the measurement point. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The structure diagram of the electromagnetic flowmeter shown in the utility model Figure 1 .

[0013] Figure 2 The structure diagram of the electromagnetic flowmeter shown in the utility model Figure 1 .

[0014] Figure 3It is a structural schematic diagram of the radar level meter in the electromagnetic flowmeter shown in the utility model. DETAILED DESCRIPTION

[0015] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection requested by the present application.

[0016] like Figure 1 , 2 As shown, an electromagnetic flowmeter suitable for multi-media and multi-working conditions includes a conductor pipe 1, an electromagnetic probe 2, a sensor and a converter (not shown in the figure). The conductor pipe 1 is made of 316L stainless steel and is used for the circulation of the fluid on the side. When the fluid passes through the pipe, the effect of its velocity and magnetic field will generate an induced electromotive force; there are four electromagnetic probes 2, which are arranged at 3 o'clock, 5 o'clock, 7 o'clock and 9 o'clock on the wall of the conductor pipe 1. The electromagnetic probe is used to detect the induced electromotive force in the magnetic field. A sensor is arranged behind the electromagnetic probe. The sensor is used to receive the induced electromotive force of the electromagnetic probe 2, convert it into an electrical signal, and amplify and process the signal to provide an accurate flow value; the converter is used to amplify the induced potential signal and convert it into a unified standard signal. The converter is arranged in a junction box 3, and the junction box 3 is used to transmit the data or signal of the converter to the outside world via a data line.

[0017] like Figure 3 As shown, the electromagnetic flowmeter of this embodiment further includes a radar level meter 4, which is arranged on the wall of the conductor pipe 1. The radar level meter 4 includes a transmitting device, a receiving device, a signal processor and an antenna (not shown in the figure), wherein the antenna is used as an interface between the radar level meter and the external environment, and is used to guide the electromagnetic waves from the transmitting device to the measured container, and is also responsible for receiving the reflected electromagnetic waves; the transmitting device transmits electromagnetic waves to the liquid surface in the conductor pipe through the antenna; the receiving device is used to capture the electromagnetic waves reflected from the liquid surface and convert them into electrical signals; the signal processor processes the electrical signal received by the receiving device, and calculates the distance between the liquid surface and the transmitting device by analyzing the time difference between the transmitted wave and the reflected wave, thereby obtaining the height of the liquid surface; the signal processor is also connected to the converter through an electrical signal, so as to finally calculate the flow rate, flow velocity and other data of the liquid through the liquid level height and the flow value signal.

[0018] The above-mentioned electromagnetic flowmeter suitable for multiple media and multiple working conditions is provided with a data line interface 5 on the radar level meter 4, which is used to transmit the data or signal of the radar level meter 4 to the outside world via the data line; when equipped with a display, it is connected to the radar level meter 4 and the junction box 3 via the data line, so that the value or signal transmitted by the radar level meter 4 and the converter is displayed on the display, and the display is further used as a human-machine interface through an industrial computer.

[0019] The above-mentioned electromagnetic flowmeter is suitable for multiple media and multiple working conditions. Considering the performance requirements such as corrosion resistance and high temperature resistance, the conductor pipe 1 is made of metal material, including any one of 316L stainless steel, carbon steel, and cast iron. At the same time, the conductor pipe can also be made of glass fiber reinforced plastic pipe, fluoroplastic pipe, polyurethane pipe and other materials to adapt to different flow measurement scenarios.

[0020] The electromagnetic flowmeter suitable for multiple media and multiple working conditions also includes a junction box, which is used to accommodate the converter and is provided with a data line connector for transmitting the data or signal of the converter to the outside world via the data line.

[0021] Furthermore, in this embodiment, the transmitting device transmits electromagnetic waves to the liquid surface in the conductor pipe through the antenna, specifically electromagnetic waves with a frequency between 300 MHz and 300 GHz. According to different scenario requirements, the transmitting device transmits electromagnetic waves to the liquid surface in the conductor pipe through the antenna, which can also be high-frequency electromagnetic waves with a frequency range of 3 MHz to 30 MHz and a wavelength of 7.5~1000m.

[0022] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electromagnetic flowmeter suitable for multiple media and multiple working conditions, comprising a conductor pipe, an electromagnetic probe, a sensor and a converter, wherein the conductor pipe refers to a channel for fluid flow, and when the fluid passes through the pipe, the velocity and the magnetic field of the fluid will generate an induced electromotive force; the electromagnetic probe is arranged on the wall of the conductor pipe, and is used to detect the induced electromotive force in the magnetic field; the sensor is arranged behind the electromagnetic probe, and is used to receive the induced electromotive force of the electromagnetic probe, and convert it into an electrical signal and amplify and process the signal to provide an accurate flow value; the converter is used to amplify the induced potential signal and convert it into a unified standard signal; its characteristics are: It also includes a radar level meter, which is arranged on the wall of the conductor pipe. The radar level meter includes a transmitting device, a receiving device, a signal processor and an antenna, wherein the antenna is used as an interface between the radar level meter and the external environment, and is used to guide electromagnetic waves from the transmitting device to the measured container, and is also responsible for receiving the reflected electromagnetic waves; the transmitting device transmits electromagnetic waves to the liquid surface in the conductor pipe through the antenna; the receiving device is used to capture the electromagnetic waves reflected from the liquid surface and convert them into electrical signals; the signal processor processes the electrical signals received by the receiving device and calculates the liquid level, and the signal processor is also connected to the converter through electrical signals, so as to calculate the flow data through the liquid level and the flow numerical signal.

2. The electromagnetic flowmeter suitable for multiple media and multiple working conditions according to claim 1 is characterized in that: The signal processor processes the electrical signal received by the receiving device, calculates the distance between the liquid surface and the transmitting device by analyzing the time difference between the transmitting wave and the reflected wave, and thus obtains the height of the liquid surface.

3. The electromagnetic flowmeter suitable for multiple media and multiple working conditions according to claim 1 is characterized in that: The electromagnetic probes are arranged on the wall of the conductor pipe and are respectively located at 3 o'clock, 5 o'clock, 7 o'clock and 9 o'clock positions in the radial direction of the conductor pipe.

4. The electromagnetic flowmeter suitable for multiple media and multiple working conditions according to claim 1 is characterized in that: It also includes a junction box, which is used to accommodate the converter and is provided with a data line connector for transmitting the data or signal of the converter to the outside world via the data line.

5. The electromagnetic flowmeter suitable for multiple media and multiple working conditions according to claim 1 is characterized in that: A data line interface is provided on the radar level meter to transmit the data or signal of the radar level meter to the outside world via the data line.

6. The electromagnetic flowmeter suitable for multiple media and multiple working conditions according to claim 1 is characterized in that: The conductor pipe is made of metal material, including any one of 316L stainless steel, carbon steel, and cast iron.

7. The electromagnetic flowmeter applicable to multiple media and multiple working conditions according to claim 1 is characterized in that: The transmitting device transmits electromagnetic waves, specifically electromagnetic waves with a frequency between 300 MHz and 300 GHz, to the liquid surface in the conductor pipe through the antenna.

8. The electromagnetic flowmeter applicable to multiple media and multiple working conditions according to claim 4 or 5, characterized in that: The device also includes a display, which is connected to the radar level meter and the junction box via a data line, so as to display the values ​​or signals transmitted by the radar level meter and the converter.

Images