CN100485326C

CN100485326C - Wide-range float type flow sensor

Info

Publication number: CN100485326C
Application number: CNB2005100485605A
Authority: CN
Inventors: 王永忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-18
Filing date: 2005-11-18
Publication date: 2009-05-06
Anticipated expiration: 2025-11-18
Also published as: CN1967160A

Abstract

A new sensor applied for flow measurement field, is wider measurement range, simple structure, and fewer parts. In the sensor's shell, the sensor probe is a Hall sensitive part, installed in the center of the top lid of the flow-guide pipe, corresponding to the magnet body above the floater, and the floater is a round-flake style, the guide rod fixed in the center position of the floater, and through the stand of the floater's flow-guide pipe, the floater maintaining a balance when displaces from top to bottom. The both sides of the top of the flow-guide pipe respectively have a drainage whole, upside and downside respectively having an export and import. When measured fluid flowing, the magnet body linked with the floater produces the corresponding displacement, making the Hall probe export the corresponding changing electric signal. The mini sensor can keep the low cost, while greatly optimize the technical targets of the flow sensor on range, precision, pressure loss, pressure resistance, etc., and achieve and some better than the existing national industry standards. When applied to civilian gas meter, it can achieve the sensing, transmission, intelligent integration of the smart gas meters in the real sense.

Description

Wide-range float type flow sensor

Affiliated technical field:

The present invention relates to the wide-range float type flow sensing device of a kind of detectable gas, fluid flow.

Background technology:

At present, known suspended body flowmeter structure is by pedestal, label, case, float, tapered tube, support plate, friction top, O-ring seal, bolt, edge cover, is assembled.When detected fluid is passed through the annular space of Taper Pipe and float formation from bottom to top, the float upper and lower side produces differential pressure and forms the thrust that float rises, when the suffered rising thrust of float when being immersed in the fluid float weight, float just rises, and the annular space area increases thereupon, and annular space place rate of flow of fluid descends immediately, float upper and lower side differential pressure reduces, the rising thrust that acts on float is also along with reducing, and when rising thrust equaled to be immersed in the fluid float weight, float just was stabilized in a certain height.There is calibrated scale on the Taper Pipe to demonstrate the size of flow simultaneously.

This kind suspended body flowmeter is low because of price, and quality easily guarantees, moderate accuracy has very high representativeness at the flow detection metering field.But, because it measures range narrow range (generally in 1:20); Volume big (as: 6 cubes of flowmeters, high 47 centimetres,

9.5 centimetre); The electric signal that detects metering for teletransmission can't be exported, the teletransmission measurement can not be realized.So, can't use at some specific areas, as fields such as domestic gas metering (by national industry regulation, domestic gas table range ratio must reach 1:160).

Summary of the invention:

Measure the range narrow range and can not carry out the technical matters that teletransmission detects metering for solving suspended body flowmeter, the invention provides a kind of novel wide-range float type flow sensor, can not only realize that wide-range detects (effectively measure range ability and be suspended body flowmeter 100 times, reach 1:200); Reduced volume (under 6 cubes of flows, high 9 centimetres,

5 centimetres); Also exportable simultaneously electric signal for teletransmission detection metering, thus reach the purpose that is applied to specific area, as the domestic gas metering field.

The technical solution adopted for the present invention to solve the technical problems is: in sensor housing, sensor probe is a Hall sensitive element, be installed in mozzle loam cake central authorities, corresponding to float top magnet, float is a round sheet body, guide rod is fixed on center, float below, and keeps balance when making the float upper and lower displacement by the center bearing bracket in the float mozzle.Respectively there is a V-type drain hole both sides, mozzle top.The sensor upper and lower respectively has one to go out, import.When detected fluid flows from bottom to top, during through the drain hole on the float mozzle, father and son's upper and lower side produces differential pressure and forms the thrust that float rises, when the suffered rising thrust of float when being immersed in the fluid float weight, float just rises, the empty area of current drainage increases thereupon, rate of flow of fluid descends immediately, and float upper and lower side differential pressure reduces, and the rising thrust that acts on float is easily along with reducing, when rising thrust equaled to be immersed in the fluid float weight, float just was stabilized in certain with height.Meanwhile produce corresponding displacement with the sensor magnet that float connects mutually, sensor output signal changes along with the size of flow, makes sensor output signal reach the purpose that produces respective change with the flow size.

The invention has the beneficial effects as follows, for the flow metering field provides a kind of novel sensor, broad quantum, parts simple in structure are few.This Miniature Sensor can greatly be optimized the technical parameter index of aspects such as the relevant range of flow sensor, precision, crushing, compressive resistance keeping cheaply simultaneously, it is reached and part is better than national existing industry standard.When using, combine, can realize that intelligent gas meter sensing, change truly sent, intelligent integral with the single-chip microcomputer intelligent control part with domestic gas table field.

Description of drawings:

The present invention is further described below in conjunction with embodiment

Fig. 1 is the installation sectional view of suspended body flowmeter.

Fig. 2 is the main pseudosection of float flow sensor.

Fig. 2 middle outlet 1, upper shell 2, signal wire 3, mozzle loam cake 4, drain hole 5, hall probe 6, magnet 7, float 8, guide rod 9, float mozzle 10, lower house 11, support 12, import 13, fluid flow direction 14.

Fig. 3 is that the rows of sensors discharge orifice is faced enlarged drawing.

Fig. 4 is circuit theory diagrams of the present invention.

Embodiment

In Fig. 1: float 8 is placed in the tapered tube 15, and tapered tube 15 combines with edge cover 16, by screw 17 friction top 18 is fixed on the pedestal 20 together with O-ring seal 19.Support plate 21 and case 22 are attached on the pedestal 20 by screw 23.

In Fig. 2: float mozzle 10 is connected with sensor lower house 11, leading Heavenly Stems and Earthly Branches frame 12 links with mozzle 10 inwalls, guide rod 9 and center, float 8 below fixed connection, magnet 7 is fixed on the center of float 8 tops, and corresponding with hall probe 6 centers.Float is moved up and down flexibly.During making, last

lower house

2 and 11 and mozzle 9 be circular, float 8 be the round sheet body, guide rod 9 employing stainless steel material.Probe Hall SS495 market purchasing part.Get final product according to the outer assembled in sequence in back in the elder generation.Volume of the present invention is little, and processing technology thereof is simple.Cost is low.Quality easily guarantees.

In Fig. 3: be that rows of sensors discharge orifice 5 is faced shape figure.

In Fig. 4: be sensor hall probe 6 internal circuits.

Claims

1. a wide-range float type flow sensor is characterized in that: the sensor housing upper and lower respectively has an export and import, the float mozzle is connected with the sensor lower house, respectively there is a drain hole both sides, float mozzle top, guide bar support and mozzle inwall link, guide rod and float center are fixedly connected, magnet is installed in the center of float top, and is corresponding with the hall probe that mozzle loam cake central authorities connect.

2. flow sensor according to claim 1 is characterized in that sensor probe adopts the linear SS495 sensitive element of Hall.

3.. flow sensor according to claim 1 is characterized in that float mozzle top two side positions respectively have a V-arrangement drain hole.

4.. flow sensor according to claim 1 is characterized in that sensor floating device is a round sheet body.