CN210625805U

CN210625805U - Wide-range float-type flow sensor

Info

Publication number: CN210625805U
Application number: CN201822063232.8U
Authority: CN
Inventors: 王永忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-04
Filing date: 2018-12-04
Publication date: 2020-05-26
Anticipated expiration: 2028-12-04

Abstract

A wide-range float-type flow sensor is a sensor really researched and developed in the field of household natural gas meters. In the sensor shell, a sensor probe is a Hall magnetic sensitive element and is arranged in the middle of a transverse strip plate above a flow guide pipe, a floater is a circular sheet-shaped body, a hollow cylinder with a rectangular hole is arranged in the center above the floater, magnets are arranged in the hollow cylinder at the upper and lower central positions and correspond to the upper and lower sides of the Hall probe in the middle of the transverse strip plate above the flow guide pipe, a guide rod is fixed in the central position below the floater, and the floater keeps balance when moving up and down through a central support in the flow guide pipe of the floater. Two sides above the flow guide pipe are respectively provided with a V-shaped drainage hole. The upper part and the lower part of the sensor are respectively provided with an outlet and an inlet. When the measured fluid flows from bottom to top, the upper and lower magnets of the sensor connected with the floater produce corresponding synchronous displacement, so that the sensor outputs an electric signal which changes along with the flow. The sensor has excellent cost performance. The gas meter can realize the integration of sensing, transmitting and intelligence.

Description

Wide-range float-type flow sensor

Belongs to the technical field of:

the invention relates to a wide-range float-type flow sensing device capable of detecting gas flow.

Background art:

at present, the known float flowmeter is formed by assembling a base, a label, a housing, a float, a conical tube, a support plate, a pressing cover, a sealing ring, a bolt, an embedding sleeve and the like. When the measured fluid passes through the annular gap formed by the taper pipe and the floater from bottom to top, the upper end and the lower end of the floater generate differential pressure to form ascending thrust of the floater, when the ascending thrust borne by the floater is greater than the weight of the floater in the fluid, the floater ascends, the area of the annular gap is increased, the flow rate of the fluid at the annular gap is immediately reduced, the differential pressure of the upper end and the lower end of the floater is reduced, the ascending thrust acting on the floater is also reduced, and the floater is stabilized at a height corresponding to the flow rate until the ascending thrust is equal to the weight of the floater in the fluid. Meanwhile, the calibration scale on the taper pipe displays the flow.

The float flowmeter has low price, easy quality guarantee, moderate precision and high representativeness in the field of flow detection and measurement. However, due to its narrow measurement range, (typically within 1: 20): large volume (e.g., 6 cubic meter, 47 cm high, 9.5 cm diameter); the electric signal for detection and measurement can not be output, and sensing, transmission and intelligent measurement can not be realized. Therefore, the method cannot be applied to certain specific fields, such as the fields of civil gas metering and the like (according to the national industry regulation, the measuring range ratio of the civil gas meter must reach 1: 160).

The invention content is as follows:

in order to solve the technical problems that the float flowmeter has narrow measuring range and cannot realize sensing, transmitting and intelligent metering, the invention provides a float type sensor which is researched and developed aiming at the field of household natural gas meters and can realize wide-range detection (the effective measuring range reaches 1: 200); reduced volume (9 cm high and 7 cm diameter at 6 cubic flow); the electric signal for detection and measurement can be output, and the electric signal is programmed with the single chip microcomputer. The gas meter can realize the integration of sensing, transmitting and intelligence. The sensor has excellent cost performance.

The technical scheme adopted by the invention for solving the technical problems is as follows: in the sensor shell, a sensor probe is a Hall magnetic sensitive element and is arranged in the middle of a transverse strip plate above a flow guide pipe, a floater is a circular sheet-shaped body, a hollow cylinder with a rectangular hole is arranged in the center above the floater, magnets are arranged in the upper center and the lower center in the hollow cylinder and correspond to the Hall probe in the middle of the transverse strip plate above the flow guide pipe, a guide rod is fixed in the center below the floater, and the floater keeps balance when moving up and down through a central support in the flow guide pipe of the floater. Two sides above the flow guide pipe are respectively provided with a V-shaped drainage hole. The upper part and the lower part of the sensor are respectively provided with an outlet and an inlet. When the measured fluid flows from bottom to top and passes through the drainage hole on the float guide pipe, the differential pressure is generated at the upper end and the lower end of the float to form the rising thrust of the float, when the rising thrust borne by the float is greater than the weight of the float in the fluid, the float rises, the area of the drainage hole is increased, the flow rate of the fluid is reduced, the differential pressure at the upper end and the lower end of the float is reduced, the rising thrust acting on the float is reduced, and the float is stabilized at the corresponding flow height until the rising thrust is equal to the weight of the float in the fluid. The upper and lower magnets of the sensor connected with the floater generate corresponding synchronous displacement, and the output signal of the sensor changes along with the flow, so that the output signal of the sensor changes along with the flow.

The invention has the advantages of providing a novel sensor for the field of flow measurement, having wide measuring range and simple structure and few parts. The sensor can increase the measuring range, improve the precision, reduce the pressure loss, increase the compression strength and other technical indexes while keeping low cost, so that the sensor reaches and is partially superior to the national current industry standard. When being applied to the civil gas meter field, the intelligent gas meter is combined with the singlechip, and the integration of sensing, transmitting and intelligence of the intelligent gas meter in the true sense can be realized.

Description of the drawings:

the present invention is further illustrated by the following examples;

fig. 1 is an installation sectional view of a float flowmeter.

Fig. 2 is a front sectional view of the float flow sensor.

In fig. 2, an outlet 1, an upper shell 2, a signal wire 3, a hall probe strip 4, a drainage hole 5, a hall probe 6, a magnet 7, a floater 8, a guide rod 9, a floater draft tube 10, a lower shell 11, a bracket 12, an inlet 13 and a fluid flowing direction 14.

Fig. 3 is an enlarged elevation view of the sensor drain hole.

Fig. 4 is an installation view of the slat 4 and the sensor probe 6.

Fig. 5 is a circuit schematic of the present invention.

Detailed Description

In fig. 1: the float 8 is placed in a conical tube 15, the conical tube 15 is combined with a bushing 16, and a pressing cover 18 together with a seal ring 19 is fixed on a base 20 by a screw 17. The bracket 21 and the camera housing 22 are connected to the base 20 by screws 23.

In fig. 2: the float guide tube 10 is connected with the lower shell 11 of the sensor, the guide rod bracket 12 is connected with the inner wall of the guide tube 10, the guide rod 9 is fixedly connected with the central position below the float 8, the magnet 7 is arranged in the cylinder above the float 8 and corresponds to the probe 6, and the float can flexibly move up and down during assembly. During manufacturing, the upper and lower shells 2 and 11 and the guide rod 9 are circular, and the floater 8 is a circular sheet-shaped body. The guide rod 9 is made of rustless metal materials, and the probe is a linear Hall device. The invention is assembled in sequence from inside to outside, and has small volume and simple processing and manufacturing process. The quality is easy to ensure.

Fig. 3 is a front shape view of the sensor drainage hole 5.

Fig. 4 is a view showing the installation of the slat 4 sensor probe 6.

Fig. 5 is a schematic circuit diagram of the present invention.

Claims

1. A wide-range float-type flow sensor is characterized in that: the sensor comprises a sensor shell, a floater flow guide pipe, a sensor support, a flow guide pipe support, a guide rod, a hollow cylinder, magnets, a Hall probe and upper and lower magnets, wherein the upper part and the lower part of the sensor shell are respectively provided with an outlet and an inlet, the floater flow guide pipe is connected with the sensor shell, two sides above the floater flow guide pipe are respectively provided with a drainage hole, the flow guide pipe support is connected with the inner wall of the flow guide pipe, the guide rod is connected with the central position below the floater, the center above the floater is provided with the hollow cylinder with a rectangular hole, the magnets are arranged at the central positions above and below the hollow cylinder, the upper part and the lower parts of the flow guide pipe are respectively provided with the cross plate, the Hall probe is arranged.

2. The flow sensor of claim 1, wherein the sensor probe comprises a linear hall sensor.

3. The flow sensor of claim 1, wherein a V-shaped drainage hole is provided on each side of the float flow guide tube above the float flow guide tube.

4. The flow sensor of claim 1, wherein the sensor float is a circular plate having a small hollow cylinder with a rectangular hole.

5. The flow sensor of claim 1, wherein the sensor probe is a dual magnet sensing configuration.