CN2694237Y

CN2694237Y - Flow sensor

Info

Publication number: CN2694237Y
Application number: CN 200420044637
Authority: CN
Inventors: 颜永戈
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-13
Filing date: 2004-04-13
Publication date: 2005-04-20
Anticipated expiration: 2014-04-13

Abstract

The utility model relates to a flow sensor which comprises a barrel-shaped casing, wherein the casing is provided with a Hall element; the inner wall of the casing is fixed with a permeable rotor bracket; one end of the rotor is positioned in a rotor base of the center of the bracket; the inner part of the casing, which is near to a casing fluid inlet is provided with a turbofan fluid director matched with the inner wall of the casing; the fluid director is provided with a turbofan for making the fluid generate eddy flow, and the other end of the rotor is positioned at the rotor base on the middle of the turbofan. The section of the rotor is crisscross and has four blades which are distributed homogeneously, and a pair of magnetic poles which are matched with each other are arranged in the two opposite blades. The rotor of the utility model adopts the crisscross structure and is provided with two pairs of magnetic poles, so the reliability of data is improved considerably. The utility model has the advantages of reliable operation and long service life.

Description

Flow sensor

[affiliated technical field]

The utility model relates to a kind of flow sensor.

[background technology]

Present flow sensor, comprise the housing that has fluid inlet and outlet, the rotor of one band through hole is installed in the housing, the axis of through hole and rotor has angle, one side of shell is equipped with near the switch Hall element, have magnetic patch on the rotor, utilize fluid directly to promote rotor rotation, and by to magnetic patch through near the counting of switch Hall element number of times, but in conjunction with the flow of other mode approach test fluid, this flow sensor, it is not firm to operate, counting precision is lower, and serviceable life is short, and the data that obtain are unreliable.

[summary of the invention]

At the existing problem of existing flow sensor, the purpose of this utility model provides and a kind ofly operates that firm, data are reliable, the flow sensor of long service life.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of flow sensor, has Hall element on the housing, be fixed with a penetrating rotor field spider on the inner walls, rotor one end is positioned at the rotator seat at carriage center place, housing is inherent to be provided with a turbofan air deflector that matches with inner walls near the shell fluid porch, air deflector has makes fluid produce the turbofan of eddy current, and the rotor other end is positioned at the rotator seat of turbofan air deflector center; The rotor cross section is " ten " shape, has the quaterfoil of evenly arranging, and is a pair of magnetic pole of coupling in two relative blades.

The beneficial effects of the utility model are: rotor adopts " ten " shape structure, has increased the active area of current to rotor, and blade is provided with two pairs of magnetic poles, improves the reliability of data greatly, and the running of sensor is firm, long service life.

[description of drawings]

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A view of Fig. 1;

Fig. 3 is the B-B view of Fig. 1;

Fig. 4 is the structural representation of the utility model rotor.

Among the figure: 1, housing, 2, the turbofan air deflector, 3, rotor, 4, Hall element, 5, turbofan, 6, magnetic pole, 7, support bar, 8, rotor field spider, 9, draw-in groove, 10, grab, 11, rotator seat, 12, blade, 13, guide groove.

[embodiment]

Embodiment one

As shown in the figure, flow sensor of the present utility model, comprise straight-cylindrical housing 1, have Hall element 4 on the housing 1, be fixed with a penetrating rotor field spider 8 on housing 1 inwall, rotor 3 one ends are positioned at the rotator seat 11 at carriage center place, housing 1 inherent close housing 1 fluid intake place is provided with a turbofan air deflector 2 that matches with housing 1 inwall, turbofan air deflector 2 has makes fluid produce the turbofan 5 of eddy current, and turbofan has 7, and rotor 3 other ends are positioned at the rotator seat 11 of turbofan air deflector 2 center; Rotor 3 cross sections are " ten " shape, have the quaterfoil 12 of evenly arranging, and are a pair of magnetic pole 6 of coupling in two relative blades; Housing 1 inwall upper edge is axially arranged with guide groove 13, and guide groove 13 is not held has draw-in groove 9, and turbofan air deflector 2 is provided with and guide groove 13 corresponding support bars 7, and support bar 7 ends are provided with the grab 10 that can stretch in the draw-in groove 9, match with draw-in groove 9.

During use, the turbofan air deflector 2 that has support bar 7 can be put into housing 1 along guide groove 13, in grab 10 snapped in draw-in groove 9, like this, rotor and turbofan air deflector 2 firmly were arranged in the housing; The four-lobe rotor of flow sensor of the present utility model, contain two pairs of magnetic poles 6, i.e. two pairs of south poles, in the time of in fluid flows into housing, fluid acts on the quaterfoil 12 of rotor 3, and rotor 3 revolutions move a week, can provide two pulse signals through Hall element 4, the sensitivity of rotor 3 detection signals obviously improves, and can be widely used in water heater, water meter, gas meter etc.

Claims

1, a kind of flow sensor, has Hall element (4) on the housing (1), be fixed with a penetrating rotor field spider (8) on housing (1) inwall, rotor (3) one ends are positioned at the rotator seat (11) of rotor field spider (8) center, it is characterized in that inherent close housing (1) the fluid intake place of housing (1) is provided with a turbofan air deflector (2) that matches with housing (1) inwall, turbofan air deflector (2) has makes fluid produce the turbofan (5) of eddy current, and rotor (3) other end is positioned at the rotator seat (11) of turbofan air deflector (2) center; Rotor (3) cross section is " ten " shape, has the quaterfoil (12) of evenly arranging, and is a pair of magnetic pole (6) of coupling in two relative blades.

2, flow sensor according to claim 1 is characterized in that housing (1) is straight tubular.

3, flow sensor according to claim 1 and 2 is characterized in that housing (1) inwall upper edge is axially arranged with guide groove (13), and turbofan air deflector (2) is provided with and the corresponding support bar (7) of guide groove (13).

4, flow sensor according to claim 3 is characterized in that guide groove (13) do not hold and have draw-in groove (9), and support bar (7) end is provided with the grab (10) that can stretch in the draw-in groove (9), match with draw-in groove (9).

5, flow sensor according to claim 1 and 2 is characterized in that turbofan (5) has 7.