CN212340327U

CN212340327U - Water flow sensor

Info

Publication number: CN212340327U
Application number: CN202020831214.4U
Authority: CN
Inventors: 朱景锋; 金鸥翔; 鲍鹏飞
Original assignee: Hangzhou Kambayashi Electronics Co Ltd
Current assignee: Hangzhou Kambayashi Electronics Co Ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-01-12
Anticipated expiration: 2030-05-19

Abstract

The utility model provides a water flow sensor, has the casing, and this casing has rivers import and rivers export, is equipped with the impeller that has the center pin in the rivers passageway between rivers import and the rivers export, and this arbor wheel axial is the same with the rivers direction, is equipped with the light screen on this impeller, the rivers passageway makes when being equipped with logical water in the rivers import direction impeller pivoted rivers deflector, radially symmetrically be equipped with emitting diode and receiving diode in the casing, the light channel between this emitting diode and the receiving diode with the light screen of impeller corresponds. The utility model is used for measure discharge, it is high to have the precision, and is withstand voltage high, small, and the structure is simple, and the cost is low, characteristics such as long service life.

Description

Water flow sensor

Technical Field

The utility model relates to a sensor, especially can survey sensor of discharge.

Background

The water flow sensor is an instrument for detecting water flow by sensing water flow and outputting signals such as current, voltage and the like, and can be used for management and flow calculation in the aspect of water control.

Along with the technical progress and the improvement of the living demands of people, the intelligent closestool is gradually popularized and popularized. The product often has a relatively long transition period in the popularization stage, and the product, parts and accessories thereof are continuously improved, innovated and updated, and the water flow sensor is one of the products. In addition, the water flow sensor is also applied to other various occasions of water flow detection.

Most of the prior art water flow sensors are of the photoelectric or hall sensor type. The former has higher measurement accuracy, but has low pressure bearing capacity due to the adoption of ultrasonic welding; the latter has higher pressure bearing capacity, but the measurement accuracy is reduced because the starting flow is improved due to the installation of the magnet. Therefore, the current water flow sensor matched with the intelligent closestool has high measurement accuracy but low pressure bearing capacity or high pressure bearing capacity but low measurement accuracy, and the requirements of users on the exquisite appearance, the wide and smooth inner space, the accurate water flow measurement, the long service life of corresponding parts and the like of the intelligent closestool are not met.

Disclosure of Invention

The utility model discloses it is low to solve the high nevertheless bearing capacity of the rivers sensor among the prior art or measurement accuracy, or the problem that bearing capacity is high but measurement accuracy is low, provides for this the utility model discloses a rivers sensor, this kind of rivers sensor measurement accuracy is high, and bearing capacity is strong, and is small, the price is low.

In order to solve the problem, the utility model discloses a technical side be equipped with the casing, its special character is the casing has rivers import and rivers export, is equipped with the impeller that has the center pin in the rivers passageway between rivers import and the rivers export, and this impeller axial is the same with the rivers direction, is equipped with the light screen that axial extension radially stretches out on this impeller, rivers passageway makes when rivers import direction is equipped with logical water impeller pivoted rivers deflector, be equipped with emitting diode and receiving diode radially symmetrically in the casing, the light channel between this emitting diode and the receiving diode with the light screen of impeller corresponds.

The light shading plates are provided with four blocks which are distributed in the circumferential direction, the four blocks can be alternately arranged in the circumferential direction with a long block and a short block in the axial direction, and the four light shading plates can also be provided with through holes or through grooves in two radially corresponding light shading plates.

Furthermore, a substrate provided with a measuring circuit is arranged on one side of the shell.

The shell is provided with a protective cover at the position corresponding to the substrate.

Preferably, a front support and a rear support are provided in the casing at positions corresponding to the water flow passages, and the front and rear ends of the central shaft of the impeller are respectively provided in the front support and the rear support.

The water flow deflection plate and the front support are fixed into a whole, when water flows through the water flow deflection plate, the water flow deflection plate deflects in the axial direction to form an included angle with the axial direction to form oblique water flows, the oblique water flows are a plurality of oblique water flows of which the number corresponds to that of the water flow deflection plates, and the impeller is pushed to rotate by lateral component force generated by the oblique water flows through the shading plate.

In which case the central shaft may be integrally attached to the visor and the central shaft may be rotatably attached to the front and rear supports.

The central shaft is not fixed with a shading plate, the central shaft is fixed with the front and the rear supports, and the shading plate is connected with a central sleeve which is rotatably sleeved on the central shaft.

The central shaft is fixedly connected with the shading plate, the central shaft is rotatably connected with the front support and the rear support, the water flow deflector can also be fixed on the central shaft instead of the front support, and the water flow deflector rotates together with the central shaft and the shading plate.

The water flow deflection plate is provided with blades which are distributed in the circumferential direction in a manner of inclining like fan blades, the blades are fixed on the front support, when water flows through, the water flow generates an inclination angle, when the blades are fixed on the central shaft, the water flow drives the deflection plate to rotate together with the central shaft.

The light shading plates are alternately arranged in the axial direction, the long light shading plates are arranged in the circumferential direction, the light shading plates are relatively long in the axial direction, the light shading plates are relatively short in the axial direction, and when the light source of the light emitting diode completely faces the light shading plates which are relatively short in the axial direction, light is shaded; when the light source part is over against the shading plate which is relatively short in the axial direction, part of light is shielded, and part of light passes through; when the light source is not directly opposite to the light shading plate which is relatively short in the axial direction, the light rays completely pass through the short end of the light shading plate. And through holes or through grooves are formed in two radially corresponding light shielding plates of the four light shielding plates, when the source is over against the through holes or the through grooves, light passes through, otherwise, the light is shielded or is shielded by a refrigerant. In practical application, the light shield is relatively short in axial direction, and light rays pass through the light shield from the direction of the short end of the light shield; the light shading plate is provided with a through hole or a through groove, and light rays pass through the through hole or the through groove.

The invention is further described with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is an external view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 2;

FIG. 4 is a cross-sectional view C-C of FIG. 1;

FIG. 5 is a view from direction F of FIG. 1;

fig. 6 is a schematic structural diagram of an impeller according to the present invention.

The figures are labeled with the corresponding parts: the device comprises a water flow inlet 1, a front support 2, a water flow deflection plate 3, an impeller 4, a long light shading plate 4-1, a central shaft 4-2, a short light shading plate 4-3, a gap 4-4, a rear support 5, a water flow outlet 6, a shell 7, a protective cover 8, a base plate 9, a fixed block 10, a light-emitting diode 11 and a receiving diode 12.

Detailed Description

A water flow sensor, a shell 7 is provided with a water flow inlet 1 and a water flow outlet 6, and a front support 2, an impeller 4 and a rear support 5 are arranged in a water flow channel between the water flow inlet 1 and the water flow outlet 6. The central shaft 4-2 of the impeller 4 is rotatably spanned between the front and

rear supports

2, 5, the impeller 4 is provided with two axially long shading plates 4-1 which are radially symmetrically arranged and two axially short shading plates 4-3 which are radially symmetrically arranged, the long shading plates 4-1 and the short shading plates 4-3 are fixed on the central shaft 4-2 in a cross-shaped intersection shape at the end surfaces, so that an axially vacant notch 4-4 is formed between the long shading plates 4-1 and the short shading plates 4-3. The front support 2 is fixed with a water flow deflection plate 3, the water flow deflection plate 3 is shaped like a fan blade, water flow is deflected by the water flow deflection plate 3, the water flow is changed into an included angle with the axial direction from being parallel to the axial direction to form an oblique water flow, the oblique water flow flows through the impeller 4, component force perpendicular to the plate surface is generated on the long and short trace light plates 4-1 and 4-3 of the impeller, and the component force pushes the impeller 4 to rotate.

The housing 7 is provided with a light emitting diode 11 and a receiving diode 12 radially symmetrically, and a light passage between the light emitting diode 11 and the receiving diode 12 corresponds to the gap 4-4. Referring to fig. 6, this correspondence means that when the impeller 4 is positioned in two long light-shielding plates 4-1 and is parallel to the light channel, the infrared light emitted by the light-emitting diode 11 is received by the receiving diode 12, the optical coupler is turned on, and the arrow in the figure indicates that the optical coupler is turned on; when the impeller 4 rotates and the two long light shielding plates 4-1 are perpendicular or nearly perpendicular to the light channel, infrared light emitted by the light emitting diode 11 is shielded, no light signal is received by the receiving diode 12, and the light coupler blocks the light. The impeller rotates for a circle by 360 degrees, and the receiving diode 12 receives two optical pulse signals. The water flow difference and the flow velocity are different, different water flows and different rotating speeds of the impeller 4 are determined, so that the rotating speed of the impeller 4 has a proportional relation with the water flow, the rotating speed of the impeller corresponds to the number of the light pulses received by the receiving diode in a time period, and the water flow value is easily obtained through photoelectric conversion.

Alternatively, it is possible to have the central shaft 4-2 fixed to the front and

rear supports

2, 5, and the long shutter 4-1 and the short shutter 4-3 intersecting at a central sleeve rotatably fitted over the central shaft 4-2.

Alternatively, the water flow deflector 3 is detached from the front support 2 and fixed to the central shaft 4-2, and when the water flow passes through, the water flow deflector 3 is rotated together with the central shaft 4-2 and the long and short sunshade panels.

Alternatively, the four light shielding plates are not alternately arranged, and the two radially corresponding light shielding plates are provided with through holes or through grooves, and the through holes or through grooves correspond to light to pass through.

The utility model discloses integrated photoelectric sensor and hall sensor's advantage, abandoned the two shortcoming, adopted the casing to refer to hall sensor promptly, so the utility model discloses bearing strength is high. The utility model adopts the light emitting diode and the receiving diode as the photoelectric sensor, which is cheap and has simple structure. The utility model discloses an impeller including long, short light screen, perhaps circumference spaced have the through-hole or lead to the groove and do not have the through-hole or lead to the impeller of the light screen in groove, need not to dispose magnetic element such as magnet, impeller rotation starting force is little, can reduce drive discharge and reduce the utility model discloses device and corresponding part volume to improve measurement accuracy. The utility model also has the characteristics of simple structure, low cost, long service life and the like.

Claims

1. The utility model provides a water flow sensor, has the casing, characterized by the casing has rivers import and rivers export, is equipped with the impeller that has the center pin in the rivers passageway between rivers import and the rivers export, and this impeller axial is the same with the rivers direction, is equipped with the radial light screen that stretches out of axial extension on this impeller, rivers passageway makes when being equipped with logical water in rivers import direction impeller pivoted rivers deflector, radially be equipped with emitting diode and receiving diode in the casing symmetrically, the light passage between this emitting diode and the receiving diode with the light screen of impeller corresponds.

2. The water flow sensor according to claim 1 wherein said diaphragm has four circumferentially spaced diaphragms alternating axially one long and one short circumferentially.

3. The water flow sensor according to claim 1, wherein the light shielding plates have four light shielding plates distributed circumferentially, and two light shielding plates radially corresponding to the four light shielding plates are provided with through holes or through grooves.

4. A water flow sensor according to claim 1, 2 or 3 wherein the housing is provided with a substrate on one side of the housing on which the measuring circuit is provided.

5. The water flow sensor of claim 4 wherein said housing has a protective cover disposed over said base.

6. The water flow sensor according to claim 5, wherein said housing has a front support and a rear support at positions corresponding to said water flow passage, and wherein front and rear ends of a central shaft of said impeller are respectively disposed at said front and rear supports.

7. The water flow sensor of claim 6 wherein said water flow deflector is integrally fixed to said front support.

8. The water flow sensor of claim 7 wherein said central shaft and shutter are integrally attached, the central shaft being rotatably connected to said front and rear supports.

9. The water flow sensor of claim 7 wherein said central shaft is fixed to said front and rear supports and said shutter is interconnected to a central hub rotatably mounted about said central shaft.

10. The water flow sensor of claim 6 wherein said central shaft is integrally secured to said light panel, said central shaft being rotatably connected to said front and rear supports, said water flow deflector being secured to said central shaft.