CN107907171B - Flow sensor - Google Patents
Flow sensor Download PDFInfo
- Publication number
- CN107907171B CN107907171B CN201711400142.7A CN201711400142A CN107907171B CN 107907171 B CN107907171 B CN 107907171B CN 201711400142 A CN201711400142 A CN 201711400142A CN 107907171 B CN107907171 B CN 107907171B
- Authority
- CN
- China
- Prior art keywords
- movable magnetic
- base body
- fluid
- hall sensor
- magnetic part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000012530 fluid Substances 0.000 claims abstract description 44
- 238000009434 installation Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000001514 detection method Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a flow sensor, which comprises a basal body, wherein the front part of the basal body is provided with a fluid inlet, the rear part of the basal body is provided with a fluid outlet, the basal body is internally provided with a mounting cavity, a movable magnetic part which is matched with the mounting cavity is arranged in the mounting cavity in a back-and-forth movable way, the inner side wall of the mounting cavity is provided with a diversion trench which is gradually enlarged from front to back, and the fluid inlet can be communicated with the fluid outlet through the mounting cavity and the diversion trench; the base body is provided with a Hall sensor and a pushing device for driving the movable magnetic part to move forwards, and when the movable magnetic part is pushed by fluid to move forwards and backwards in the mounting cavity, the Hall sensor can detect the magnetic field change of the movable magnetic part. The invention can accurately detect the flow of the fluid, has simple and reliable structure, is convenient to process and manufacture, can effectively reduce the cost of the product and is convenient to popularize and use.
Description
Technical Field
The present invention relates to a kind of a fluid flow detection device.
Background
The flow of fluids such as water, gas and the like is often required to be detected on a gas pipe, a water pipe and the like so as to be automatically controlled, and at present, the detection of the fluid flow is usually realized by a flow sensor, however, the existing flow sensor has a complex structure and high cost, and is not convenient to popularize and use.
Disclosure of Invention
In order to solve the problems, the invention aims to provide the flow sensor which is simple and reliable in structure and convenient to popularize and use.
The invention adopts the technical proposal for solving the technical problems that:
the flow sensor comprises a substrate, wherein the front part of the substrate is provided with a fluid inlet, the rear part of the substrate is provided with a fluid outlet, the substrate is internally provided with a mounting cavity, a movable magnetic piece matched with the mounting cavity is movably arranged in the mounting cavity back and forth, the inner side wall of the mounting cavity is provided with a diversion trench which is gradually increased from front to back, and the fluid inlet can be communicated with the fluid outlet through the mounting cavity and the diversion trench; the base body is provided with a Hall sensor and a pushing device for driving the movable magnetic part to move forwards, and when the movable magnetic part is pushed by fluid to move forwards and backwards in the mounting cavity, the Hall sensor can detect the magnetic field change of the movable magnetic part.
Preferably, when the moving magnetic element is pushed by the fluid to move back and forth in the mounting cavity, the distance between the moving magnetic element and the hall sensor can be changed accordingly, so that the hall sensor can detect the magnetic field change of the moving magnetic element.
Preferably, the pushing device is a fixed magnetic piece arranged on the base body.
Preferably, the fixed magnetic piece is arranged in the mounting cavity and is positioned behind the movable magnetic piece, and the fixed magnetic piece and the movable magnetic piece are magnetically repulsive to push the movable magnetic piece to move forwards.
Preferably, the hall sensor is located in front of or behind the moving magnetic element.
Preferably, the number of the diversion trenches is several and evenly distributed along the inner side wall of the installation cavity.
Preferably, the base body is tubular, the fluid inlet is a front end opening of the base body, the fluid outlet is a rear end opening of the base body, and the mounting cavity is a middle inner cavity of the base body.
Preferably, the outer wall of the base body is provided with a mounting groove matched with the Hall sensor, and the Hall sensor is inserted and fixed in the mounting groove and is separated from the inner cavity of the base body.
The beneficial effects of the invention are as follows: according to the invention, after the fluid such as water and gas enters the installation cavity through the fluid inlet, the movable magnetic part can be pushed to move backwards along the installation cavity, along with the backward movement of the movable magnetic part, the part of the guide groove communicated with the installation cavity is bigger and bigger, when the communication part is matched with the flow of the fluid, the movable magnetic part can be stabilized at the corresponding position, the Hall sensor can detect the magnetic field change of the movable magnetic part, so that the position of the movable magnetic part can be calculated, the size of the fluid flow at the moment can be calculated by combining the shape of the guide groove, the structure is simple and reliable, the processing and the manufacturing are convenient, the product cost can be effectively reduced, and the popularization and the use are convenient.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a schematic view showing the internal structure of the present invention after half-cutting the substrate.
Detailed Description
Referring to fig. 1 to 3, a flow sensor includes a base 10, a fluid inlet 21 is provided at the front of the base 10, a fluid outlet 22 is provided at the rear of the base 10, a mounting cavity 23 is provided in the base 10, a moving magnet 31 adapted to the mounting cavity 23 is provided in the mounting cavity 23 so as to be movable back and forth, a diversion trench 24 is provided on the inner sidewall of the mounting cavity 23 and gradually increases from front to back, and the fluid inlet 21 can be communicated with the fluid outlet 22 through the mounting cavity 23 and the diversion trench 24; the base 10 is provided with a hall sensor 40 and a pushing device for driving the movable magnetic member 31 to move forward, and the hall sensor 40 can detect a change in the magnetic field of the movable magnetic member 31 when the movable magnetic member 31 is pushed by the fluid to move forward and backward in the installation cavity 23. In the invention, after fluid such as water, gas and the like enters the installation cavity 23 through the fluid inlet 21, the movable magnetic piece 31 can be pushed to move backwards along the installation cavity 23, along with the backward movement of the movable magnetic piece 31, the part of the guide groove 24 communicated with the installation cavity 23 is bigger and bigger, when the communication part is matched with the flow of the fluid, the movable magnetic piece 31 can be stabilized at the corresponding position, the Hall sensor 40 can detect the magnetic field change of the movable magnetic piece 31, thereby the position of the movable magnetic piece 31 can be calculated, and the size of the fluid flow at the moment can be calculated by combining the shape of the guide groove 24. The front, rear, and other orientations in the present invention are used for convenience of description only, and do not refer to the front-rear relationship on a straight line, and are not to be construed as limiting the present invention. The hall sensor 40 is a magnetic field sensor fabricated based on the hall effect, the structure and principles of which are well known to those skilled in the art and will not be described in detail herein.
In this embodiment, when the moving magnetic element 31 is pushed by the fluid to move back and forth in the mounting cavity 23, the distance between the moving magnetic element 31 and the hall sensor 40 can be changed accordingly, so that the hall sensor 40 can detect the magnetic field change of the moving magnetic element 31, the hall sensor 40 can be conveniently mounted, and the magnetic field change of the moving magnetic element 31 can be detected more accurately.
In this embodiment, the pushing device is a fixed magnetic member 32 disposed on the base 10, which has a simple structure, is not easy to rust, and is convenient to install and use.
In this embodiment, the fixed magnetic member 32 is disposed in the mounting cavity 23 and is located at the rear of the movable magnetic member 31, the fixed magnetic member 32 and the movable magnetic member 31 repel each other and can push the movable magnetic member 31 forward by the magnetic force between the fixed magnetic member 32 and the movable magnetic member 31, so that the installation is convenient, the magnetic force between the fixed magnetic member 32 and the movable magnetic member 31 can be utilized to drive the movable magnetic member 31 to move to the greatest extent, the obstruction to the fluid can be reduced, of course, in practical application, the fixed magnetic member 32 can also be disposed at the rear or side of the movable magnetic member 31, in this embodiment, both the fixed magnetic member 32 and the movable magnetic member 31 are made of permanent magnets, the fixed magnetic member 32 is aligned with the rear of the guide slot 24, so that the fluid can flow through the guide slot 24 at the side of the fixed magnetic member 32, the manufacture and assembly of the fixed magnetic member 32 are facilitated, and the magnetic force of the fixed magnetic member 32 can also be improved to the greatest extent, and of course, in practical application, the fixed magnetic member 32 can also be made of a ring-shaped structure or other shapes for allowing the fluid to pass through.
The hall sensor 40 is located in front of or behind the moving magnetic element 31, so that the magnetic field change of the moving magnetic element 31 can be more accurately sensed, and the position and the corresponding flow of the moving magnetic element 31 can be more accurately calculated.
The number of the diversion trenches 24 is several and evenly distributed along the inner side wall of the installation cavity 23, which is helpful for increasing the maximum effective flow of the invention, is convenient for use and is also convenient for calculating the flow.
In this embodiment, the base 10 is tubular, the fluid inlet 21 is a front end opening of the base 10, the fluid outlet 22 is a rear end opening of the base 10, the installation cavity 23 is a middle inner cavity of the base 10, and the structure is simple, and is convenient for processing and assembly.
The outer wall of the base body 10 is provided with the mounting groove 13 which is matched with the Hall sensor 40, the Hall sensor 40 is inserted and fixed in the mounting groove 13 and is separated from the inner cavity of the base body 10, the installation and wiring of the Hall sensor 40 are convenient, the liquid such as water inlet short circuit or ignition gas of the Hall sensor 40 can be avoided, the service life of the invention can be effectively prolonged, the failure occurrence rate is reduced, and the use safety is ensured.
The foregoing is only a preferred embodiment of the present invention, and all technical solutions for achieving the object of the present invention by substantially the same means are within the scope of the present invention.
Claims (5)
1. A flow sensor, characterized by: the device comprises a base body (10), wherein a fluid inlet (21) is formed in the front part of the base body (10), a fluid outlet (22) is formed in the rear part of the base body, an installation cavity (23) is formed in the base body (10), a moving magnetic piece (31) which is matched with the installation cavity (23) is arranged in the installation cavity (23) in a back-and-forth moving mode, a diversion trench (24) which is gradually increased from front to back is formed in the inner side wall of the installation cavity (23), and the fluid inlet (21) can be communicated with the fluid outlet (22) through the installation cavity (23) and the diversion trench (24); the base body (10) is provided with a Hall sensor (40) and a pushing device for driving the movable magnetic part (31) to move forwards, and when the movable magnetic part (31) is pushed by fluid to move forwards and backwards in the mounting cavity (23), the Hall sensor (40) can detect the magnetic field change of the movable magnetic part (31); the pushing device is a fixed magnetic piece (32) arranged on the base body (10), the fixed magnetic piece (32) is arranged in the mounting cavity (23) and is positioned behind the movable magnetic piece (31), and the fixed magnetic piece (32) and the movable magnetic piece (31) are magnetically repulsed to push the movable magnetic piece (31) to move forwards;
the base body (10) is tubular, the fluid inlet (21) is a front end opening of the base body (10), the fluid outlet (22) is a rear end opening of the base body (10), the installation cavity (23) is a middle inner cavity of the base body (10), the movable magnetic part (31) is cylindrical, and the side wall of the movable magnetic part (31) is in butt fit with the inner side wall of the installation cavity (23).
2. A flow sensor according to claim 1, characterized in that: when the movable magnetic part (31) is pushed by fluid to move back and forth in the mounting cavity (23), the distance between the movable magnetic part (31) and the Hall sensor (40) can be changed, so that the Hall sensor (40) can detect the magnetic field change of the movable magnetic part (31).
3. A flow sensor according to claim 1, characterized in that: the Hall sensor (40) is positioned in front of or behind the movable magnetic part (31).
4. A flow sensor according to claim 1, characterized in that: the number of the diversion trenches (24) is several and evenly distributed along the inner side wall of the installation cavity (23).
5. A flow sensor according to claim 1, characterized in that: the Hall sensor (40) is inserted and fixed in the mounting groove (13) and is separated from the inner cavity of the base body (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711400142.7A CN107907171B (en) | 2017-12-22 | 2017-12-22 | Flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711400142.7A CN107907171B (en) | 2017-12-22 | 2017-12-22 | Flow sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107907171A CN107907171A (en) | 2018-04-13 |
| CN107907171B true CN107907171B (en) | 2024-04-16 |
Family
ID=61869684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711400142.7A Active CN107907171B (en) | 2017-12-22 | 2017-12-22 | Flow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107907171B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297548B (en) * | 2018-09-29 | 2024-08-23 | 山东科尔自动化仪表股份有限公司 | Magnetic flowmeter and measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2563554Y (en) * | 2002-08-07 | 2003-07-30 | 四川西部高新产业开发有限公司 | Fluid flow sensor |
| CN2854523Y (en) * | 2005-12-23 | 2007-01-03 | 北京海慧信息科技有限公司 | Gas flow sensor |
| CN201251457Y (en) * | 2008-07-22 | 2009-06-03 | 青岛隆盛希望电子有限公司 | Running water sensor |
| CN101688797A (en) * | 2007-07-13 | 2010-03-31 | 可口可乐公司 | Flow sensor with moveable magnet |
| CN201740549U (en) * | 2010-04-17 | 2011-02-09 | 邱国雄 | High-precision trace flowmeter |
-
2017
- 2017-12-22 CN CN201711400142.7A patent/CN107907171B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2563554Y (en) * | 2002-08-07 | 2003-07-30 | 四川西部高新产业开发有限公司 | Fluid flow sensor |
| CN2854523Y (en) * | 2005-12-23 | 2007-01-03 | 北京海慧信息科技有限公司 | Gas flow sensor |
| CN101688797A (en) * | 2007-07-13 | 2010-03-31 | 可口可乐公司 | Flow sensor with moveable magnet |
| CN201251457Y (en) * | 2008-07-22 | 2009-06-03 | 青岛隆盛希望电子有限公司 | Running water sensor |
| CN201740549U (en) * | 2010-04-17 | 2011-02-09 | 邱国雄 | High-precision trace flowmeter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107907171A (en) | 2018-04-13 |
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