CN2708257Y

CN2708257Y - Flow sensor

Info

Publication number: CN2708257Y
Application number: CN 200420049391
Authority: CN
Inventors: 李锺奉
Original assignee: KOREA AOC CO Ltd
Current assignee: KOREA AOC CO Ltd
Priority date: 2004-04-23
Filing date: 2004-04-23
Publication date: 2005-07-06
Anticipated expiration: 2014-04-23

Abstract

The utility model relates to a flow sensor installed on the midway of the fluid distributing pipe, which aims to reduce the loading of the calandria and check flow accurately. Therefore, the flow sensor of the utility model splits flow a part of the fluid passing by the channel (11) of the shell (10) of the sensor, making a rotor (20) rotate, and the flow capacity is checked by the number of revolution of the rotor (20). Even the flow sensor is installed on the midway of the pipe line of the fluid, the pipe line also nearly can not generate loading, moreover, the data on flow can be checked accurately by a Hall sensor (61). Simultaneously, the utility model has the advantage that because of the pipe line nearly do not generate loading, the flow sensor can be easily applied to the pipe line with major diameter.

Description

Flow sensor

Technical field

The utility model relates to a kind of fluid piping flow sensor midway that is installed on, and in more detail, relates to a kind of utilization and makes the rotor rotation through the fluid of via hole, detects the flow sensor of flow by the revolution of this rotor.

Background technology

Generally speaking, flow sensor is mainly used in the fluid flow that detects boiler or water heater etc., and Fig. 1 is the inner structure sketch map of flow sensor in the past.

As shown in Figure 1, flow sensor had following several sections in the past: shell 1, its inside are formed with circular free air space 1b, and left and right sides is formed with inlet 1a and outlet 1c in opposite directions; Cap 4, it is installed on the free air space 1b inside of shell 1, can be rotated by axle 2, becomes a plurality of blade 3a of radial support, and it can be rotated, and it also is equipped with printed circuit board (PCB) (printedciruit board is hereinafter to be referred as PCB) 6.

In addition, on turning axle 2 tops of rotor 3, ringshaped magnet 5 is housed, the side with magnet 5 on the cap 4 keeps certain intervals to be built-in with Hall element 7.And Hall element 7 is connected with the PCB6 conduction.Therefore, behind the inlet 1a inflow free air space 1b of fluid by shell 1, in the process (reference arrow direction) by outlet 1c discharge, the rotor 3 that magnet 5 is housed rotates, and PCB6 is by the revolution and the calculated flow rate of Hall element 7 detection rotors 3.But in this structure of flow sensor in the past, the rotor 3 that magnet 5 is housed directly is installed in the free air space 1b that the fluid of shell 1 flows, so influence the mobile smoothly of fluid, therefore, existence can not detect the shortcoming of accurate data.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming of doing existence in the above-mentioned prior art, and a kind of novel flow sensor is provided, and this flow sensor has improved the mounting structure of shell and rotor, has reduced fluid piping and has produced load, can detect flow exactly.

The purpose of this utility model is achieved in that the utility model is in being installed on the flow sensor of fluid piping road in order to the detection flow, its feature has following several sections: sensor outer housing, its both sides are formed with inflow entrance and flow export in opposite directions, and its inside has path; Rotor, it is combined in the axle that stands on this sensor outer housing central portion outside and goes up also and can rotate, and its top is installed with magnet by circumferencial direction; Shell-cap, it is installed on the central portion of sensor outer housing, its inner free air space that forms, so that can wrap rotor masterlyly, its top keeps at the magnet with rotor under the condition of certain intervals the PCB that has Hall element being installed; Conduit, it passes the wall of sensor outer housing, is installed in shell-cap inside, and inlet is towards the path inflow entrance of sensor outer housing, and outlet is directed to free air space to a part of fluid through path towards rotor; Escape hole, it is the center with the rotor, be positioned at substantially with conduit sensor outer housing wall in opposite directions on, the fluid that flows into free air space is sent to the path of sensor outer housing

As the above-mentioned detailed description of doing, flow sensor shunting of the present utility model makes the rotor rotation through a part of fluid of the path of sensor outer housing, by the revolution detection flow of this rotor.Therefore, have following effect: even at the flow sensor of installation midway of fluid line, pipeline also produces load hardly, and, can accurately detect data on flows by Hall element.Simultaneously, owing to produce load in the pipeline hardly, so can be applied to this flow sensor in the large diameter pipeline at an easy rate.

Description of drawings

Fig. 1 be in the past boiler with the sectional view of flow sensor.

Fig. 2 is the side view of flow sensor of the present utility model.

Fig. 3 is the decomposition side view of flow sensor of the present utility model.

Fig. 4 is the sectional view of the IV-IV line of Fig. 3, has demonstrated the inner structure of flow sensor.

Fig. 5 is the decomposition side view of intercepting the utility model sensor outer housing conduit and discharge nozzle structure.

Fig. 6 is the conduit intercepting side view of seeing from the arrow IV direction of Fig. 5.

The symbol description of accompanying drawing major part

10, sensor outer housing 11, path 20, rotor 30, shell-cap 31, free air space 40, conduit 50, escape hole 60, PCB 70, PCB-lid

Embodiment

With reference to the accompanying drawings, describe a useful embodiment of the present utility model in detail.

Flow sensor of the present utility model as shown in Figures 2 and 3, it has following several sections: sensor outer housing 10, its inside have fluid and move required path 11; Rotor 20, it is combined on the axle that stands on this sensor outer housing 10 central portions outside, has a plurality of blades 21 on it, so that rotate by a part of fluid of being shunted; Shell-cap 30, it is installed on the central portion of sensor outer housing 10, its inner free air space 31 that holds rotor 20 that forms; PCB60, it is on the top of this shell-cap 30; Conduit 40, it passes the central portion wall of sensor outer housing 10, and a part of fluid through path 11 is directed to free air space 31; Escape hole 50 is used for the path 11 that a fluid that flows into free air space 31 is sent to sensor outer housing 10 again.

As shown in Figure 3 and Figure 4, sensor outer housing 10 has constituted the profile of flow sensor, and its left and right sides has inflow entrance 12 and flow export 13 in opposite directions, so that be installed on pipeline (not marking among the figure) midway with connecting.And, in the central portion of sensor outer housing 10 outside, also have one the required level and smooth installation portion 14 of rotor 20 and shell-cap 30 is installed, in the central authorities of this installation portion 14, standing metal shaft 15 has been installed.This metal shaft 15 can make rotor 20 rotations.Rotor 20 have certain interval ground to insert and be incorporated into the turning axle 22 of metal shaft 15, the constraint of a plurality of blades 21 of arranging at certain intervals in these turning axle 22 outer periphery.In embodiment of the present utility model, constituted 8 blades 21 at interval with 45 degree, these blades 21 contact with the fluid of process free air space 31, simultaneously, rotor 20 self are rotated to certain orientation.

And, the turning axle of rotor 20 22 topmost and the bottom surface of shell-cap 30 keep certain clearance (being about 0.3mm among the utility model embodiment), this is in order to guarantee to occur certain space when rotor 20 high speed rotating.In addition, on turning axle 22 tops of rotor 20, be fixed with a plurality of flat thin magnets 23, so that the N utmost point and S arrange most probably alternately with the ring-type embedding.

And shell-cap 30 is a media with sealing gasket 32, is installed on the installation portion 14 of sensor outer housing 10 with screw 33, and portion is formed with the free air space 31 of open underneath within it, so that wrap rotor 20 masterlyly.In addition, PCB-lid 70 is installed on the top of shell-cap 30, covers 70 inside, arranging the PCB60 that has Hall element 61 at this PCB-; And, magnet 23 arranged in proximity of Hall element 61 and rotor 20, thereby by magnet 23, revolution that can detection rotor 20.

On the other hand, as Fig. 4-shown in Figure 6, conduit 40 passes installation portion 14 walls of sensor outer housing 10, is installed on free air space 31 inside of shell-cap 30, and its inlet 41 is towards path 11 inflow entrances 12 1 sides of sensor outer housing 10, and its outlet 42 is towards rotor 20.In this case, the outlet 42 of conduit 40 is towards the blade 21 of rotor 20, and this is for rotor 20 is more successfully rotated.

For this conduit 40 is installed, on installation portion 14 walls of sensor outer housing 10, be drilled with mounting hole 16, the central part of conduit 40 is inserted and be fixed in the mounting hole 16.

So, a part of fluid that flows into paths 11 by inflow entrance 12 successfully flows into by the inlet 41 of conduit 40, tangentially spues to rotor 20 then, will be elaborated to this in the effect of back.

In addition, outlet 42 side lower parts of conduit 40 have tangentially fluid are guided into the required guide portion 43 of rotor 20.This guide portion 43 is towards the blade 21 direction bendings of rotor 20.And the effect of escape hole 50 is path 11 1 sides of the fluid that flows into free air space 31 inside being delivered to again sensor outer housing 10, and it is the center with rotor 20, is formed at substantially on installation portion 14 walls with conduit 40 sensor outer housing 10 in opposite directions.Therefore, by escape hole 50, the path 11 of sensor outer housing 10 simply is connected with the free air space 31 of shell-cap 30.

At first, the fluid of process fluid line is by the path 11 of inflow entrance 12 flow sensor shells 10, and then, major part is discharged to fluid line again by flow export 13.

In addition, a part of fluid that flows into inflow entrance 12 then, flows out to the free air space 31 of shell-cap 30 by inlet 41 inflow catheters 40 by conduit 40 outlets 42.So, the fluid that flows out to free air space 31 tangentially contacts with the blade 21 of rotor 20, and the rotor 20 that magnet 23 is installed rotates in proportion according to Fluid Volume.

On the other hand, PCB60 passes to the control part (in figure do not mark) of water heater or boiler etc. with electric signal with it by the revolution of the magnet 23 that together rotates with rotor 20 and fixing Hall element 61 detection rotors 20.Then, the fluid that flows into free air space 31 and rotor 20 is rotated is discharged to the path 11 of sensor outer housing 10 again by escape hole 50.

As a result, a part of fluid flow through successively free air space 31, the escape hole 50 of conduit 40, shell-cap 30 make rotor 20 rotations simultaneously, and the PCB60 that has a Hall element 61 is by magnet 23 revolution of detection rotor 20 exactly.So, a part of fluid of only shunting process pipe arrangement also detects flow, so, prevented because of the phenomenon that flow sensor is loaded pipe arrangement midway is installed.In addition, fluid is the tangential direction supply to rotor 20, so rotor 20 smooth rotations, so, Hall element 61 just can pass through rotor 20 revolutions, detects flow more accurately.

Claims

1, a kind of flow sensor, it is installed on fluid piping midway, it is characterized in that it is made of following several sections: sensor outer housing (10), its both sides are formed with inflow entrance (12) and flow export (13) in opposite directions, and its inside has path (11); Rotor (20), it is combined in the axle (15) that stands on this sensor outer housing (10) central portion outside and goes up also and can rotate, and its top is installed with magnet (23) by circumferencial direction; Shell-cap shell-cap (30), it is installed on the central portion of sensor outer housing (10), its inner free air space (31) that forms, so that can wrap rotor (20) masterlyly, its top is keeping under the condition of certain intervals the PCB (60) that has Hall element (6) being installed with the magnet (23) of rotor (20); Conduit, it passes the wall of sensor outer housing (10), is installed in shell-cap (30) inside, and inlet (41) is towards path (11) inflow entrance (12) of sensor outer housing (10), outlet (42) is directed to free air space (31) to a part of fluid through path (11) towards rotor (20); Escape hole (50), it is the center with rotor (20), be positioned at substantially with above-mentioned conduit (40) sensor outer housing (10) wall in opposite directions on, the fluid that flows into free air space (31) is sent to the path (11) of sensor outer housing (10).

2, according to the said flow sensor of claim 1, it is characterized in that: the outlet (42) of above-mentioned conduit (40) is positioned on the tangential direction of above-mentioned rotor (20).

3, according to claim 1 or 2 said flow sensors, it is characterized in that: conduit (40) outlet (42) side end has the guide portion (43) of tangentially fluid being guided into rotor (20).