CN204575148U - A kind of magnetoelectric flowmeter - Google Patents

Abstract

The utility model discloses a magnetoelectric flow meter, which comprises a meter body, a liquid wheel sensing mechanism and an electronic equipment compartment. When the magnetic flowmeter is working, the liquid flows through the pipe at the lower end of the meter body and enters the liquid wheel chamber at the upper end of the meter body. A permanent magnet is installed on the liquid wheel of the liquid wheel. When the liquid wheel rotates under the impetus of the liquid, the coil cuts the magnetic line of the permanent magnet to generate an induced electromotive force; the first signal of the induced electromotive force is transmitted to the sensor mechanism installed in the liquid wheel through the terminal The first processing circuit in the electronic equipment compartment at the upper end transmits the generated second signal to the microcontroller after processing, and the microcontroller collects the second signal and converts the collected second signal into flow display. Since the magnetoelectric flowmeter provided by the utility model uses the coil to cut the magnetic force lines of the permanent magnet to generate electromotive force to measure the flow, the problem of being stuck caused by the worm gear and worm drive to measure the flow is avoided.

Description

A magnetic flow meter

technical field

The utility model relates to the technical field of mechanical equipment, in particular to a magnetoelectric flowmeter.

Background technique

At present, mechanical flowmeters are commonly used in pipeline flow measurement. A mechanical flowmeter is generally composed of a liquid wheel, a worm gear mechanism, a counter, and a display code disc. When water passes through the flow in the pipeline to drive the liquid wheel to rotate, the worm gear mechanism converts the vertical rotation into a horizontal rotation and transmits it to the counter. The transmission mechanism, the transmission mechanism reduces the rotational speed by variable ratio, and finally transmits it to the counting dial for display. In the process of worm gear and gear transmission, because the worm gear must cooperate with the liquid wheel, the worm gear is immersed in the fluid for a long time. When there are many impurities in the fluid or the sediment content is large, the sediment may block the worm gear. In the screw mechanism of the machine, the mechanism is stuck and cannot operate normally, resulting in inaccurate or non-counting.

Therefore, how to solve the problem that the flowmeter cannot operate normally due to the stuck worm gear of the flowmeter, and then cause the flowmeter to count inaccurately or not count is a technical problem to be solved urgently by those skilled in the art.

Utility model content

In view of this, the purpose of this utility model is to provide a magnetoelectric flowmeter to solve the problem that the worm gear of the flowmeter is stuck and the flowmeter cannot operate normally, which in turn causes the flowmeter to count inaccurately or not. the goal of.

In order to achieve the above object, the utility model provides the following scheme:

A magnetic flowmeter comprising:

A meter body, the upper end of the meter body is provided with a liquid wheel chamber, the lower end of the meter body is provided with a pipeline, and the liquid wheel chamber is connected to the pipeline;

The liquid wheel sensing mechanism installed in the liquid wheel chamber, the liquid wheel sensing mechanism includes a liquid wheel support, a liquid wheel, a coil support, a coil and a terminal, the coil is fixedly packaged on the coil support and Electrically connected with the terminal, the coil bracket is mounted on the liquid wheel bracket, the liquid wheel is rotatably mounted on the liquid wheel bracket, and the permanent magnet is mounted on the liquid wheel sheet of the liquid wheel. When the liquid wheel rotates under the impetus of the liquid, the coil cuts the magnetic force lines of the permanent magnet to generate induced electromotive force;

The electronic equipment compartment installed on the meter body, the interior of the electronic equipment compartment is equipped with a first processing circuit, a microcontroller and a power supply device, the first processing circuit is electrically connected to the terminal, and the microcontroller Electrically connected with the first processing circuit, the connecting terminal transmits the first signal of the induced electromotive force generated by the coil to the first processing circuit, and the first processing circuit will process the first signal The second signal generated after that is transmitted to the microcontroller, the microcontroller collects the second signal and converts the collected second signal into a flow display, and the power supply device is used for the first processing The circuit and the microcontroller provide power.

Preferably, in the above magnetic flowmeter, the first processing circuit includes an amplification circuit and a filter circuit;

The amplifying circuit is electrically connected to the connecting terminal, the filtering circuit is electrically connected to the amplifying circuit, and the microcontroller is electrically connected to the filtering circuit;

The amplifying circuit amplifies the first signal, and the filtering circuit filters the amplified first signal to generate a second signal.

Preferably, in the above magnetoelectric flowmeter, the number of the coils is 2, and the 2 coils are symmetrically fixed and packaged on one side of the coil support with respect to the hydraulic wheel.

Preferably, in the above magnetoelectric flowmeter, the liquid wheel includes a first liquid wheel, a second liquid wheel and a third liquid wheel, and the first liquid wheel and the second liquid wheel The permanent magnets are arranged on the sheets, and the non-magnetic counterweight is arranged on the third liquid wheel sheet.

Preferably, in the above magnetoelectric flowmeter, the first liquid impeller, the second liquid impeller and the third liquid impeller are evenly distributed on the liquid impeller.

Preferably, in the above magnetoelectric flowmeter, the liquid impeller further includes a fourth liquid impeller, a fifth liquid impeller and a sixth liquid impeller, wherein the fourth liquid impeller is located at the first Between the first liquid wheel and the second liquid wheel, the fifth liquid wheel is located between the second liquid wheel and the third liquid wheel, and the sixth liquid wheel is located at the Between the first liquid impeller and the third liquid impeller.

Preferably, in the above magnetoelectric flowmeter, a shaft is further provided on the liquid wheel, and the shaft is rotatably mounted on the liquid wheel support.

Preferably, in the above magnetoelectric flowmeter, the electronic equipment compartment is provided with a battery compartment and a circuit board slot, the battery compartment is used to install the power supply device, and the circuit board slot is used to install the Describe the first processing circuit.

Preferably, in the above-mentioned magnetoelectric flowmeter, an upper cover is further included, and the upper cover is detachably installed with the electronic equipment compartment for sealing the electronic equipment compartment.

Preferably, in the above magnetoelectric flowmeter, a button cover is further included, and the button cover is installed on the upper cover for decorating the magnetoelectric flowmeter.

It can be seen from the above technical solution that the magnetoelectric flowmeter provided by the utility model is connected to the pipeline because the liquid wheel chamber is connected, so when the magnetoelectric flowmeter is working, the liquid flows through the pipeline at the lower end of the meter body and enters The liquid wheel chamber at the upper end of the meter body. The liquid wheel sensing mechanism is installed in the liquid wheel chamber. The liquid wheel sensing mechanism includes a liquid wheel support, a liquid wheel, a coil support, a coil and a terminal. The terminal is electrically connected to the coil. The coil is installed on the coil support. The coil support Installed on the liquid wheel bracket, the liquid wheel can be rotatably installed on the liquid wheel bracket, the liquid wheel of the liquid wheel is installed with a permanent magnet, when the liquid wheel rotates under the push of the liquid, the coil cuts the magnetic force lines of the permanent magnet to generate an induced electromotive force; The connecting terminal transmits the first signal of the induced electromotive force generated by the coil to the first processing circuit in the electronic equipment compartment installed on the upper end of the hydraulic wheel sensor mechanism, and the first processing circuit processes the first signal to generate the second signal The microcontroller collects the second signal and converts the collected second signal into a flow display, wherein the power supply device is used to provide energy to the first processing circuit and the microcontroller. Since the magnetoelectric flowmeter provided by the utility model uses the coil to cut the magnetic force lines of the permanent magnet to generate the induced electromotive force to measure the flow, it avoids the use of the worm gear to measure the flow, so it avoids the flow meter not working normally caused by the worm gear being stuck. , which in turn causes the problem of inaccurate or non-counting of the flowmeter.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the magnetoelectric flowmeter that the utility model provides;

Fig. 2 is the schematic diagram of the exploded structure of the magnetoelectric flowmeter provided by the utility model;

Fig. 3 is a structural schematic diagram of the liquid wheel sensing mechanism of the magnetoelectric flowmeter provided by the utility model;

Fig. 4 is the schematic structural view of the liquid wheel of the magnetoelectric flowmeter provided by the utility model;

Fig. 5 is the schematic structural view of the liquid wheel and the coil of the magnetoelectric flowmeter provided by the utility model;

Fig. 6 is a structural schematic diagram of the electronic equipment compartment of the magnetoelectric flowmeter provided by the utility model;

Fig. 7 is a time sequence diagram of one turn of the liquid wheel of the magnetoelectric flowmeter provided by the present invention.

Among them, in Fig. 1-Fig. 7:

Meter body 1, liquid wheel sensor mechanism 2, electronic equipment compartment 3, permanent magnet 4, non-magnetic counterweight body 5, upper cover 6, buckle cover 7, liquid wheel chamber 101, pipeline 102, liquid wheel support 201, liquid wheel 202 , liquid wheel 2021, first liquid wheel 20211, second liquid wheel 20212, third liquid wheel 20213, fourth liquid wheel 20214, fifth liquid wheel 20215, sixth liquid wheel 20216, shaft 2022 , coil support 203, coil 204, battery compartment 301, circuit board slot 302.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

According to Faraday's law of electromagnetic induction, the utility model is developed and designed based on the principle that conductor coils generate induced electromotive force in a changing magnetic field. The formula is as follows: E=n*ΔΦ/Δt, Faraday's law of electromagnetic induction, E: induced electromotive force (V), n : The number of turns of the induction coil, ΔΦ/Δt is the change rate of the magnetic flux, the water flow is used to drive the liquid wheel to rotate, the magnet is fixed on the liquid wheel, and the coil is fixed on one side of the liquid wheel. When rotating, the magnet follows the liquid wheel to rotate, generating a magnetic field change, the induction coil generates an induced electromotive force to the changing magnetic field, and after processing through the amplification and filtering circuit, the micro-processing unit monitors the change of the induced electromotive force, and calculates the flow of the fluid through a prefabricated algorithm according to the pipe diameter and number of revolutions, and calculates the flow rate Store and display.

Please refer to Fig. 1-Fig. 6, which are structural schematic diagrams of the magnetoelectric flowmeter provided by the utility model. The magnetoelectric flowmeter provided by the utility model includes: a meter body 1, the upper end of the meter body 1 is provided with a liquid wheel chamber 101, and the lower end of the meter body 1 is provided with a pipeline 102, and the liquid wheel chamber 101 communicates with the pipeline 102; The liquid wheel sensing mechanism 2 in the liquid wheel chamber 101, the liquid wheel sensing mechanism 2 includes a liquid wheel support 201, a liquid wheel 202, a coil support 203, a coil 204 and connection terminals, and the coil 204 is fixedly packaged on the coil support 203 and connected to the coil support 203. The wiring terminals are electrically connected, the coil 204 is installed on the coil support 203, the coil support 203 is installed on the liquid wheel support 201, the liquid wheel 202 is rotatably installed on the liquid wheel support 201, and the liquid wheel sheet 2021 of the liquid wheel 202 is installed with a permanent Magnet 4, when the liquid wheel 202 rotates under the impetus of the liquid, the coil 204 cuts the magnetic lines of force of the permanent magnet 4 to generate an induced electromotive force; the electronic equipment compartment 3 installed on the upper end of the liquid wheel sensing mechanism 2, the interior of the electronic equipment compartment 3 is installed with The first processing circuit, microcontroller and power supply device, the first processing circuit is electrically connected to the connection terminal, the microcontroller is electrically connected to the first processing circuit, and the connection terminal transmits the first signal of the induced electromotive force generated by the coil to the first processing circuit, the first processing circuit transmits the second signal generated after processing the first signal to the microcontroller, and the microcontroller collects the second signal and converts the collected second signal into a flow display, and the power supply device uses for powering the first processing circuit and the microcontroller.

It should be noted that the first processing circuit is a conventional circuit, and the microcontroller is a conventional controller, both of which are well-known technical means in the field, and are not the core improvement points of the present invention.

The magnetoelectric flowmeter provided by the utility model, because the liquid wheel chamber 101 is connected with the pipeline 102, therefore, when the magnetoelectric flowmeter works, the liquid flows through the pipeline 102 at the lower end of the meter body 1 and enters the upper end of the meter body 1 The liquid wheel storehouse 101. The liquid wheel sensing mechanism 2 is installed in the liquid wheel chamber 101, and the liquid wheel sensing mechanism 2 includes a liquid wheel support 201, a liquid wheel 202, a coil support 203, a coil 204 and a connecting terminal, the connecting terminal is electrically connected with the coil 204, and the coil 204 is installed on the coil support 203, the coil support 203 is installed on the liquid wheel support 201, the liquid wheel 202 is rotatably installed on the liquid wheel support 201, and the liquid wheel sheet 2021 of the liquid wheel 202 is equipped with a permanent magnet 4, when the liquid wheel When the 202 rotates under the impetus of the liquid, the coil 204 cuts the magnetic field lines of the permanent magnet 4 to generate an induced electromotive force; the connecting terminal transmits the first signal of the induced electromotive force generated by the coil 204 to the electronic equipment compartment 3 installed on the upper end of the liquid wheel sensor mechanism 2 The first processing circuit in the first processing circuit transmits the second signal generated after processing the first signal to the microcontroller, and the microcontroller collects the second signal and converts the collected second signal into flow rate It is shown, wherein the power supply device is used to provide energy to the first processing circuit and the microcontroller. Since the magnetoelectric flowmeter provided by the utility model uses the coil 204 to cut the magnetic field lines of the permanent magnet 4 to generate an induced electromotive force to measure the flow, it avoids the use of the worm gear to measure the flow, and therefore avoids the failure of the flowmeter caused by the worm gear being stuck. Normal operation, which in turn causes the problem of inaccurate or non-counting of the flowmeter.

In the magnetoelectric flowmeter provided by the utility model, the first processing circuit is integrated on the electronic equipment compartment 3, which solves the problem of inconvenient installation caused by the combination of the existing flowmeter plus collection and transmission equipment and the overall integrity of the equipment The problem of insufficiency. And the coil 204 is fixed and packaged on the coil support 203 . Encapsulating the coil 204 on the coil support 203 prevents the coil 204 from being exposed to the outside and being damaged.

In the magnetoelectric flowmeter provided by the utility model, the structure of the pipeline 102 part of the magnetoelectric flowmeter is the standard size of the flange type pipeline 102 flowmeter required by the relevant national regulations, and can be compared with the existing standard flowmeter. Interchangeable installation.

In another embodiment provided by the present invention, the structure of the magnetoelectric flowmeter in this embodiment is similar to the magnetoelectric flowmeter in Embodiment 1, and the similarities will not be repeated, and only the differences will be introduced. place.

In this embodiment, the specific composition of the first processing circuit is disclosed: including an amplifier circuit and a filter circuit, the amplifier circuit is electrically connected to the terminal, the filter circuit is electrically connected to the amplifier circuit, the microcontroller is electrically connected to the filter circuit, and the amplifier circuit The first signal is amplified, and the filter circuit filters the amplified first signal to generate a second signal. This is just a specific form of the first processing circuit of the present utility model. It should be noted that the first processing circuit can also be composed of other forms, as long as the first signal can be processed to generate the second signal, so that the microcontroller The composition of the first processing circuit that can be analyzed and displayed is within the protection scope of the present invention.

It should be noted that both the amplifying circuit and the filtering circuit are conventional circuits, which are technical means known in the art, and are not the core improvement points of the present invention.

In this embodiment, the coil 204 is an O-shaped coil, and is 6 mm away from the permanent magnet 4 on the liquid wheel 202 .

In this embodiment, the number of coils 204 is two, and the two coils 204 are symmetrically fixed and packaged on one side of the coil support 203 with respect to the liquid wheel 202 . The two coils 204 are provided for the convenience of judging the flow direction of the liquid.

In this embodiment, the liquid wheel 2021 includes a first liquid wheel 20211, a second liquid wheel 20212 and a third liquid wheel 20213, and the first liquid wheel 20211 and the second liquid wheel 20212 are provided with permanent The magnet 4 and the third liquid wheel piece 20213 are provided with a non-magnetic counterweight 5 . The permanent magnet 4 plays the role of metering, and the non-magnetic counterweight 5 is provided for counterweight, wherein the non-magnetic counterweight 5 has no magnetism and cannot generate magnetic lines of force. And in this embodiment, the first liquid wheel 20211 , the second liquid wheel 20212 and the third liquid wheel 20213 are evenly distributed on the liquid wheel 202 . This facilitates the stability of the rotation speed of the liquid wheel 202 .

In this embodiment, the liquid wheel 2021 further includes a fourth liquid wheel 20214, a fifth liquid wheel 20215 and a sixth liquid wheel 20216, wherein the fourth liquid wheel 20214 is located between the first liquid wheel 20211 and the sixth liquid wheel 20214. Between the two liquid wheels 20212, the fifth liquid wheel 20215 is located between the second liquid wheel 20212 and the third liquid wheel 20213, and the sixth liquid wheel 20216 is located between the first liquid wheel 20211 and the third liquid wheel Between 20213.

When the second liquid wheel piece 20212 and the third liquid wheel piece 20213 are respectively located in the range of the magnetic force lines of the two coils 204, the permanent magnet 4 on the second liquid wheel piece 20212 passes through the coil 204, and the corresponding coil 204 will cut the permanent magnet 4 The magnetic line of force, and generate the induced electromotive force, the amplifier circuit will amplify the first signal of the induced electromotive force, and then filter the amplified first signal through the filter circuit to generate the second signal and send it to the microcontroller, and the microcontroller outputs The corresponding converted traffic.

When the fifth liquid wheel 20215 and the sixth liquid wheel 20216 are respectively located in the range of the magnetic force lines of the two coils 204, at this time, since there is no permanent magnet 4 on the fifth liquid wheel 20215 and the sixth liquid wheel 20216, therefore, The coil 204 has no induced electromotive force, the amplifying circuit amplifies the generated first signal of zero induced electromotive force, and then filters the amplified first signal through the filter circuit to generate a second signal which is sent to the microcontroller, and the output of the microcontroller corresponds to of converted traffic.

When the first liquid wheel piece 20211 and the third liquid wheel piece 20213 are located in the range of the magnetic field lines of the two coils 204, the corresponding coils 204 will cut the magnetic line of force of the permanent magnet 4 on the first liquid wheel piece 20211, and generate Induced electromotive force, the amplification circuit amplifies the first signal of the induced electromotive force, and then filters the amplified first signal through the filter circuit to generate a second signal to the microcontroller, and the microcontroller outputs the corresponding converted flow rate .

When the first liquid wheel 20211 and the second liquid wheel 20212 are respectively located in the range of the magnetic force lines of the two coils 204, since the first liquid wheel 20211 and the second liquid wheel 20212 are provided with permanent magnets 4, therefore, 2 The two permanent magnets 4 intersect with the two coils 204 respectively, and generate two induced electromotive forces, the amplifying circuit respectively amplifies the first signals of the two induced electromotive forces, and then respectively amplifies the amplified first signals through the filter circuit The filtering generates a second signal and transmits it to the microcontroller, and the microcontroller outputs the corresponding converted flows respectively.

As shown in Figure 7, it is a timing diagram for collecting, showing the timing of a liquid wheel rotating one circle. After the liquid wheel rotates, the permanent magnet 4 cuts two coils 204 (the two coils 204 are respectively A coil and B coil) to generate After the electromotive force, the waveform diagram formed after amplification and filtering, where A in the figure represents the induced electromotive force generated by the A coil, and B in the figure represents the induced electromotive force generated by the B coil. Due to the positional relationship between the two coils 204, firstly, coil A generates electromotive force output at high level (see area a in the waveform diagram), when the liquid wheel continues to rotate, coil B generates electromotive force output at high level, and coil A continues to output high level at this time Flat (see waveform diagram area b), when the liquid wheel 202 continues to rotate, A coil is far away from the permanent magnet 4, the induced electromotive force is reduced and the output is low after amplification and filtering comparison (see waveform diagram c area), B coil is far away from the permanent magnet 4 Finally, the induced electromotive force is reduced and the output is low after the amplification and filtering comparison (see the d area of the waveform diagram). When another magnet passes through the coil, the waveforms of the e, f, and g areas will also be generated. At this time, the microcontroller judges as The liquid wheel 202 has rotated one revolution, and the amount of water flowing through the pipeline is calculated according to the pipe diameter and the circumference of the liquid wheel.

According to the graphics output by the microcontroller, the number of turns of the liquid wheel 202, the speed and direction of the liquid wheel 202 are judged, and the flow rate and flow direction are converted.

In this embodiment, the liquid wheel 202 is further provided with a shaft 2022 installed on the liquid wheel bracket 201 . It is convenient for the liquid wheel 202 to rotate around the shaft 2022.

In this embodiment, the electronic equipment compartment 3 is provided with a battery compartment 301 and a circuit board slot 302, the battery compartment 301 is used to install a power supply device, and the circuit board slot 302 is used to install the first processing circuit, that is, an amplifier circuit and a filter circuit. It should be noted that the microcontroller can also be integrated and mounted on the circuit board slot 302 . The first processing circuit board, microcontroller and power supply device are installed inside the electronic equipment compartment 3. The first processing circuit transmits the induced electromotive force generated by the coil 204, and the microcontroller collects it and converts it into a flow display. electronic core components. The first processing circuit inside the electronic equipment compartment 3 of the utility model adopts slot type installation, which is convenient for equipment modular installation and subsequent upgrade work.

In this embodiment, the magnetoelectric flowmeter further includes an upper cover 6 , which is detachably installed with the electronic equipment compartment 3 for sealing the electronic equipment compartment 3 . It can achieve the sealing effect of the highest level IP68 of the connector waterproof level standard.

In this embodiment, the magnetoelectric flowmeter further includes a buckle cover 7 installed on the upper cover 6 for decoration of the magnetoelectric flowmeter.

"First" and "second" in the present utility model are for distinction in description, and have no other special meanings.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a magnetoelectric flowmeter, is characterized in that, comprising:

Table body (1), the upper end of described table body (1) is provided with liquid wheel storehouse (101), the lower end of described table body (1) is provided with pipeline (102), and described liquid wheel storehouse (101) is connected with described pipeline (102);

Be arranged on liquid wheel sensing mechanism (2) in described liquid wheel storehouse (101), described liquid wheel sensing mechanism (2) comprises liquid wheel support (201), liquid wheel (202), coil brace (203), coil (204) and connection terminal, described coil (204) is fixedly encapsulated in described coil brace (203) and goes up and be electrically connected with described connection terminal, described coil brace (203) is arranged on described liquid wheel support (201), described liquid wheel (202) is rotatably arranged on described liquid wheel support (201), permanent magnet (4) is arranged on liquid wheel sheet (2021) of described liquid wheel (202), when rotating under liquid wheel (202) promotion at liquid, the magnetic line of force that described coil (204) cuts described permanent magnet (4) produces induction electromotive force,

Be arranged on the electronic equipment storehouse (3) on table body, the inside of described electronic equipment storehouse (3) is provided with the first treatment circuit, microcontroller and electric supply installation, described first treatment circuit is electrically connected with described connection terminal, described microcontroller is electrically connected with described first treatment circuit, first signal of the induction electromotive force that described coil produces by described connection terminal passes to described first treatment circuit, the secondary signal processing rear generation to described first signal is passed to described microcontroller by described first treatment circuit, described microcontroller gathers secondary signal and converts the secondary signal collected to flow indication, described electric supply installation is used for providing energy to described first treatment circuit and described microcontroller.

2. magnetoelectric flowmeter according to claim 1, is characterized in that, described first treatment circuit comprises amplifying circuit and filtering circuit;

Described amplifying circuit is electrically connected with described connection terminal, and described filtering circuit is electrically connected with described amplifying circuit, and described microcontroller is electrically connected with described filtering circuit;

Described first signal amplifies by described amplifying circuit, and the first signal after amplification is carried out filtering and generates secondary signal by described filtering circuit.

3. magnetoelectric flowmeter according to claim 1, it is characterized in that, described liquid wheel sheet (2021) comprises the first liquid wheel sheet (20211), the second liquid wheel sheet (20212) and the 3rd liquid wheel sheet (20213), described first liquid wheel sheet (20211) and described second liquid wheel sheet (20212) are provided with described permanent magnet (4), described 3rd liquid wheel sheet (20213) arranges nonmagnetic balance weight body (5).

4. magnetoelectric flowmeter according to claim 3, it is characterized in that, described coil (204) quantity is 2, and 2 described coils (204) take turns (202) symmetrical side being fixedly encapsulated in described coil brace (203) about described liquid.

5. magnetoelectric flowmeter according to claim 4, it is characterized in that, described first liquid wheel sheet (20211), described second liquid wheel sheet (20212) and described 3rd liquid wheel sheet (20213) are distributed on described liquid wheel (202).

6. magnetoelectric flowmeter according to claim 5, it is characterized in that, described liquid wheel sheet (2021) also comprises the 4th liquid wheel sheet (20214), 5th liquid wheel sheet (20215) and the 6th liquid wheel sheet (20216), wherein, described 4th liquid wheel sheet (20214) is positioned between described first liquid wheel sheet (20211) and described second liquid wheel sheet (20212), described 5th liquid wheel sheet (20215) is positioned between described second liquid wheel sheet (20212) and described 3rd liquid wheel sheet (20213), described 6th liquid wheel sheet (20216) is positioned between described first liquid wheel sheet (20211) and described 3rd liquid wheel sheet (20213).

7. magnetoelectric flowmeter according to claim 1, is characterized in that, described liquid wheel (202) is also provided with axle (2022), and described axle (2022) is rotatably arranged on described liquid wheel support (201).

8. magnetoelectric flowmeter according to claim 1, it is characterized in that, described electronic equipment storehouse (3) is provided with battery compartment (301) and board in circuit board slot (302), described battery compartment (301) is for installing described electric supply installation, and described board in circuit board slot (302) is for installing described first treatment circuit.

9. magnetoelectric flowmeter according to claim 1, it is characterized in that, also comprise upper cover (6), described upper cover (6) and described electronic equipment storehouse (3) are detachably installed, for sealing described electronic equipment storehouse (3).

10. magnetoelectric flowmeter according to claim 9, is characterized in that, also comprises buckle closure (7), and described buckle closure (7) is arranged on described upper cover (6), for decorating described magnetoelectric flowmeter.