CN217900918U

CN217900918U - Magnetoelectric flowmeter

Info

Publication number: CN217900918U
Application number: CN202221438828.1U
Authority: CN
Inventors: 陈雷
Original assignee: Yifeng Electronic Technology Dongguan Co ltd
Current assignee: Yifeng Electronic Technology Dongguan Co ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-11-25
Anticipated expiration: 2032-06-09

Abstract

The utility model relates to the technical field of flowmeters, in particular to a magnetoelectric flowmeter, which comprises a signal processing assembly and a flowmeter assembly, wherein the flowmeter assembly comprises a shell, an impeller and magnets, the signal processing assembly comprises an inductor and a circuit board, the shell is provided with an inner cavity and a rotating shaft, the impeller is provided with a shaft cavity, the rotating shaft is rotatably assembled in the shaft cavity, the impeller is provided with two magnet cavities, the two magnet cavities are respectively provided with magnets, the magnetic poles of the two magnets are opposite, the inductor is arranged on the circuit board, and the inductor is used for inducing the magnetic signals of the two magnets; the ball is arranged between the rotating shaft and the cavity bottom of the shaft cavity, and the ball is movably connected with the rotating shaft and the cavity bottom of the shaft cavity. The utility model provides a pair of magnetoelectric flowmeter, the user can calculate the flow of liquid through the quantity that reads pulse signal, and the rotation of impeller is more in the same direction as smooth.

Description

Magnetoelectric flowmeter

Technical Field

The utility model belongs to the technical field of the flowmeter technique and specifically relates to indicate a magneto-electric flowmeter.

Background

The flow metering is a technology with increasing demand at present, and plays a very important role in liquid measurement work. And the structure of the flowmeter commonly used at present, as shown in fig. 9, the drain pan of flowmeter is post structure, and the top of post structure is the toper shape, and the plane of cooperation impeller, rotation between supplementary post and the impeller reduces and rotates frictional force, but because the post is longer, the top is stranded gas easily when the production is moulded plastics, leads to the vertex of a cone of post not smooth, still can influence the rotation of impeller in reality.

Disclosure of Invention

The utility model discloses problem to prior art provides a magneto-electric flowmeter sets up the ball between the shaft cavity of pivot and impeller, can make the rotation of impeller more in the same direction as smooth, and the production of pivot is difficult for influencing the impeller.

In order to solve the technical problem, the utility model discloses a following technical scheme: a magnetoelectric flowmeter comprises a signal processing assembly and a flowmeter assembly, wherein the flowmeter assembly comprises a shell, an impeller and magnets, the signal processing assembly comprises an inductor and a circuit board, the shell is provided with an inner cavity, a rotating shaft is convexly arranged on the shell, the rotating shaft is positioned in the inner cavity, the impeller is provided with a shaft cavity, the impeller is arranged in the inner cavity, the rotating shaft is rotatably assembled in the shaft cavity, the impeller is provided with two magnet cavities, the two magnet cavities are positioned at the periphery of the shaft cavity, and the magnets are assembled in the two magnet cavities; the signal processing assembly is arranged on the shell, the inductor is arranged on the circuit board and used for inducing the magnetic signals of the two magnets, and the inductor is in signal connection with an external control device through the circuit board; the ball bearing is arranged between the rotating shaft and the cavity bottom of the shaft cavity, and the ball bearing is movably connected with the rotating shaft and the cavity bottom of the shaft cavity.

Preferably, the sensor is a hall sensor.

Preferably, one end of the rotating shaft contacting the ball is provided as a plane.

Preferably, one end of the rotating shaft, which is in contact with the ball, is provided with a concave arc surface, and the concave arc surface is used for accommodating the ball.

Preferably, the two magnet cavities are symmetrically arranged on two sides of the shaft cavity.

Preferably, the protruding a plurality of support bars that are equipped with in the chamber wall in magnet chamber, magnet install behind the magnet chamber with the support bar is contradicted.

Preferably, the shell comprises a bottom shell and a face cover, the face cover is detachably mounted on the bottom shell, and the inner cavity is formed between the face cover and the bottom shell.

Preferably, one end of the impeller, which is close to the face cover, is convexly provided with a circular convex point, and the circular convex point is rotationally connected with the face cover.

Preferably, a sealing ring is arranged at the joint between the face cover and the bottom shell, and the face cover is connected with the bottom shell in a sealing manner through the sealing ring.

Preferably, the signal processing assembly further comprises an inner cover, a bracket and a pin header, the inner cover is arranged on the shell, the bracket is arranged on the inner cover, an installation cavity is formed between the bracket and the inner cover, the circuit board is assembled in the installation cavity, the bracket is provided with a fixing hole, and the pin header is connected with the circuit board through signals after penetrating through the fixing hole.

The utility model has the advantages that:

1. the utility model discloses set up two magnets on the impeller, the magnetic field direction of magnet is south pole and north pole respectively, set up the inductor again, utilize two kinds of magnetic fields of inductor response, export high, low level pulse signal respectively, the impeller turns round and exports the pulse signal of a cycle, therefore the user can calculate the flow of liquid through reading the quantity of pulse signal;

2. the ball is additionally arranged at the position where the rotating shaft is contacted with the impeller, so that the contact between the rotating shaft and the impeller is smoother, and the rotating shaft is not required to be provided with a conical structure, so that the injection molding production is easier.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is a schematic structural view of the bottom case of the present invention;

fig. 4 is a first cross-sectional view of the bottom case of the present invention;

fig. 5 is a second cross-sectional view of the bottom case of the present invention;

fig. 6 is a first schematic structural view of the impeller of the present invention;

fig. 7 is a second schematic structural view of the impeller of the present invention;

FIG. 8 is a pulse signal diagram of the present invention;

fig. 9 is prior art.

The reference numerals in fig. 1 to 9 include:

1-impeller, 2-magnet, 3-inductor, 4-circuit board, 5-inner cavity, 6-rotating shaft, 7-shaft cavity, 8-magnet cavity, 9-rolling ball, 10-plane, 11-concave arc surface, 12-supporting strip, 13-bottom shell, 14-surface cover, 15-round salient point, 16-sealing ring, 17-inner cover, 18-bracket and 19-pin header.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.

The first embodiment is as follows:

the magnetoelectric flowmeter provided by the embodiment includes a signal processing component and a flowmeter component, the flowmeter component includes a housing, an impeller 1 and a magnet 2, the signal processing component includes an inductor 3 and a circuit board 4, the housing is provided with an inner cavity 5, the housing is convexly provided with a rotating shaft 6, the rotating shaft 6 is located in the inner cavity 5, the impeller 1 is provided with a shaft cavity 7, the impeller 1 is installed in the inner cavity 5, the rotating shaft 6 is rotatably assembled in the shaft cavity 7, the impeller 1 is provided with two magnet cavities 8, the two magnet cavities 8 are located at the periphery of the shaft cavity 7, the magnet 2 is assembled in the two magnet cavities 8, and optionally, the magnetic poles of the two magnets 2 can be selected to be the same or opposite according to the type of the hall inductor; the signal processing component is arranged on the shell, the inductor 3 is arranged on the circuit board 4, the inductor 3 is used for inducing magnetic signals of the two magnets 2, and the inductor 3 is in signal connection with an external control device through the circuit board 4; the ball bearing 9 is arranged between the rotating shaft 6 and the cavity bottom of the shaft cavity 7, and the ball bearing 9 is movably connected with the rotating shaft 6 and the cavity bottom of the shaft cavity 7. Optionally, the sensor 3 is a hall sensor.

Specifically, this embodiment realizes statistics to the liquid flow by setting up magnet 2 and inductor 3 that is used for inducing the magnetic field, the position setting of magnet 2 and inductor 3 is as shown in fig. 2, magnet 2 is located the periphery of shaft cavity 7 of impeller 1, inductor 3 is located the top of magnet 2, the magnetic field direction of two magnets 2 is south pole and north pole respectively, impeller 1 rotates and drives two magnets 2 to rotate, when magnet 2 passes through the below of inductor 3, inductor 3 then induces the magnetic field and outputs corresponding pulse signal, as shown in fig. 8, impeller 1 makes a round turn, inductor 3 outputs high, low level pulse signal respectively to the magnetic field of two magnets 2, form the pulse signal of a cycle, therefore the user can calculate the flow of liquid by reading the quantity of pulse signal, for example: the liquid output per one revolution (one pulse) of the impeller 1 is 0.5g, and the flow rate of 100 revolutions =100x0.5=50g. Furthermore, compared with the prior art in which the tapered rotating shaft 6 is arranged, the ball 9 is installed between the rotating shaft 6 and the bottom of the shaft cavity 7 in the embodiment, as shown in fig. 2, the ball 9 can make the impeller 1 rotate more smoothly, and the rotating shaft 6 is more convenient in the injection molding process, so that the unsmooth phenomenon is not easy to occur, and the rotation of the impeller 1 is not easy to be affected.

Wherein, the end of the rotating shaft 6 contacting the ball 9 can be optionally set as a plane 10, as shown in fig. 4.

In the magnetoelectric flowmeter provided by the embodiment, as shown in fig. 6, two magnet cavities 8 are symmetrically arranged on two sides of the shaft cavity 7. Specifically, the positions of the two magnets 2 affect the duty ratios of the high-level pulse signals and the low-level pulse signals shown in fig. 8, and the two magnets 2 are symmetrically installed on two sides of the axial cavity 7, so that the ratio of the formed high-level pulse signals to the formed low-level pulse signals is 1:1.

in the magnetoelectric flowmeter provided in this embodiment, as shown in fig. 6, a plurality of support bars 12 are convexly disposed on the cavity wall of the magnet cavity 8, and the magnet 2 is mounted in the magnet cavity 8 and then abutted against the support bars 12.

Specifically, support bar 12 contradicts with magnet 2, can make magnet 2's installation more firm, and the top of support bar 12 is provided with the inclined plane, is convenient for get into in the magnet chamber 8 to magnet 2 direction.

In the magnetoelectric flowmeter provided in this embodiment, as shown in fig. 2, the casing includes a bottom case 13 and a face cover 14, the face cover 14 is detachably mounted on the bottom case 13, the inner cavity 5 is formed between the face cover 14 and the bottom case 13, and the casing is provided with a water inlet and a water outlet, which is the prior art. Further, a sealing ring 16 is arranged at a joint between the surface cover 14 and the bottom shell 13, and the surface cover 14 is connected with the bottom shell 13 in a sealing manner through the sealing ring 16.

Specifically, the sealing ring 16 is provided to increase the sealing performance between the face cover 14 and the bottom case 13, and improve the accuracy of flow measurement, and the installation manner of the sealing ring 16 is shown in fig. 2, which is a conventional manner and is not described herein again.

As shown in fig. 2 and 6, a convex point 15 is convexly arranged at one end of the impeller 1 close to the surface cover 14, and the convex point 15 is rotatably connected with the surface cover 14.

Specifically, the top of the impeller 1 is provided with the round salient points 15, so that the contact point between the impeller 1 and the surface cover 14 does not influence the rotation of the impeller 1, and the smooth rotation of the impeller 1 can be further improved.

The magnetoelectric flowmeter that this embodiment provided, as fig. 2, the signal processing subassembly still includes inner cup 17, bracket 18 and row needle 19, inner cup 17 install in the shell, bracket 18 install in form the installation cavity between inner cup 17, bracket 18 and the inner cup 17, circuit board 4 assemble in the installation cavity, bracket 18 has seted up the fixed orifices (not shown in the drawing), arrange behind the needle 19 wear to establish the fixed orifices with circuit board 4 signal connection. Specifically, the inner cover 17 is fixed to the face cover 14 so that the inductor 3 can easily sense the magnetic fields of the two magnets 2, and the circuit board 4 is disposed in a conventional manner and is signal-connected to an external control device through the pin header 19 so as to transmit a detection signal of the inductor 3.

The second embodiment:

as shown in fig. 5, the present embodiment is different from the first embodiment in that the top of the rotating shaft 6 is provided with a concave arc surface 11, so that the ball 9 can rotate in the concave arc surface 11.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. A magneto-electric flowmeter which characterized in that: the flowmeter comprises a signal processing assembly and a flowmeter assembly, wherein the flowmeter assembly comprises a shell, an impeller and a magnet, the signal processing assembly comprises an inductor and a circuit board, the shell is provided with an inner cavity, the shell is convexly provided with a rotating shaft, the rotating shaft is positioned in the inner cavity, the impeller is provided with a shaft cavity, the impeller is arranged in the inner cavity, the rotating shaft is rotatably assembled in the shaft cavity, the impeller is provided with two magnet cavities, the two magnet cavities are positioned on the periphery of the shaft cavity, and the magnet is assembled in each of the two magnet cavities; the signal processing assembly is arranged on the shell, the inductor is arranged on the circuit board and used for inducing magnetic signals of the two magnets, and the inductor is in signal connection with an external control device through the circuit board; the ball bearing is arranged between the rotating shaft and the cavity bottom of the shaft cavity, and the ball bearing is movably connected with the rotating shaft and the cavity bottom of the shaft cavity.

2. The magnetoelectric flowmeter of claim 1, wherein: the inductor is a Hall sensor.

3. The magnetoelectric flowmeter of claim 1, wherein: one end of the rotating shaft, which is in contact with the ball, is arranged to be a plane.

4. The magnetoelectric flowmeter of claim 1, wherein: the rotating shaft is provided with a concave arc surface at one end contacted with the ball, and the concave arc surface is used for accommodating the ball.

5. The magnetoelectric flowmeter of claim 1, wherein: the two magnet cavities are symmetrically arranged on two sides of the shaft cavity.

6. The magnetoelectric flowmeter of claim 1, wherein: the protruding a plurality of support bars that are equipped with in the chamber wall in magnet chamber, magnet install in the magnet chamber after with the support bar is contradicted.

7. The magnetoelectric flowmeter of claim 1, wherein: the shell comprises a bottom shell and a face cover, the face cover is detachably arranged on the bottom shell, and the inner cavity is formed between the face cover and the bottom shell.

8. The magnetoelectric flowmeter of claim 7, wherein: one end of the impeller, which is close to the face cover, is convexly provided with a circular convex point, and the circular convex point is rotationally connected with the face cover.

9. The magnetoelectric flowmeter of claim 7, wherein: the connecting part between the surface cover and the bottom shell is provided with a sealing ring, and the surface cover is connected with the bottom shell in a sealing way through the sealing ring.

10. The magnetoelectric flowmeter of claim 1, wherein: the signal processing assembly further comprises an inner cover, a bracket and a pin header, wherein the inner cover is arranged on the shell, the bracket is arranged on the inner cover, an installation cavity is formed between the bracket and the inner cover, the circuit board is assembled in the installation cavity, the bracket is provided with a fixing hole, and the pin header penetrates through the fixing hole and then is in signal connection with the circuit board.