CN2219488Y

CN2219488Y - Flap-type flowmeter

Info

Publication number: CN2219488Y
Application number: CN 94248849
Authority: CN
Inventors: 闻福义; 王志华
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-21
Filing date: 1994-12-21
Publication date: 1996-02-07
Anticipated expiration: 2004-12-21

Abstract

The utility model relates to a flap type flowmeter which belongs to the measurement of fluid continuously flowing through a meter, can be used for measuring the instant quantity and the cumulant of the fluid, and can accurately measure liquid and gas, such as cold water, hot water, acid liquid, alkaline liquid, salty liquid, etc. The utility model comprises a fixed baffle plate, a turning plate, a driving shaft, a rotating shaft, a U-shaped magnet, a hairspring, an agate bearing, an angular displacement sensor, etc. When the liquid flows through the utility model, the liquid drives the turning plate and the hair spring to form a pair of balanced moments, and different angular displacement is converted into frequency signals by the angular displacement sensor, and the frequency signals are transmitted to a monolithic computer to carry out calculation by the angular displacement sensor. The utility model has the advantages of high measuring precision, small frictional resistance, long service life, low cost and wide measuring range.

Description

The turnover plate type flow instrument

The utility model turnover plate type flow instrument belongs to the measurement of passing through the fluid of instrument continuously, can be used for measuring the instantaneous flow and the semi-invariant of fluid, can both accurately measure for liquids and gases such as hot and cold water, acid, alkali, salt.

Be provided with high speed rotating mechanism in the mechanical type instrument such as spiral type that passes through at present and rotary wind type, be easy to stuck, stop up, wearing and tearing, be not easy to automatic control; And electromagnetism or ultrasonic flow meter, low precision under low discharge, the production difficulty is big, support equipment complexity, unstable properties.

No. 91209560.1 patents of China's utility model patent, open " a kind of impeller type flowmeter ", it is a kind of tangential rotary wing flow table, its watchcase has adopted round tube and cylindrical chamber structure combining, advantages such as it is simple in structure that it is had, and is convenient to injection moulding and makes, and cost is low.

In addition, No. 90213090.0 patents disclose a kind of " scraper-type flow transmitter ".It is made up of fluid, housing, cylindrical rotor, scraper plate, connecting rod, spring etc., is characterized in that the housing inner chamber is made up of the different face of cylinder of two radiuses and the curved surface of two special geometric shapes, can guarantee that motion steadily.

The purpose of the utility model turnover plate type flow instrument is in order to overcome the shortcoming and defect of above-mentioned instrument, a kind of measuring accuracy height to be provided, and frictional resistance is little, long service life, and measurement range is wide, the turnover plate type flow instrument that production cost is low.

The concrete structure of this turnover plate type flow instrument and shape see accompanying

drawing

1,2,3 for details, mainly contain angular displacement sensor telecommunication cable and measurement section and grade.It comprises critical pieces such as thimble 1, agate bearing 3, transmission shaft 4, hairspring 9, angular displacement sensor 12, telecommunication cable 13, U type magnet 15, flow instrument housing 18, fixed dam 19, rotating shaft 20, turnover panel 22, balanced weight 26, wherein semicircle fixed dam 19 is fixed in the flow instrument housing 18, semicircle turnover panel 22 is fixed in the rotating shaft 20 by screw 21, rotating shaft 20 is fixed with transmission shaft 4 usefulness screws again, by agate bearing 3 and thimble 1 acting in conjunction, with rotating shaft 20 jack-up, make turnover panel 22 20 freely rotate certain angular displacement around the shaft; Hairspring 9 usefulness nuts 17 tighten together with transmission shaft 4, and the other end of hairspring 9 and fixed support 7 tighten together; U type magnet 15 is a top that is fixed on rotating shaft 4 wherein, and another piece U type magnet is fixed on the transmission shaft of sensor 12 lower ends; With dividing plate 16, packing ring 10 sensor 12 and detected fluid are separated, sensor 12 is closed in the sensor wrap 14.

The principle of work of turnover plate type flow instrument and process: the flow instrument of at first selecting corresponding specification according to the size of the flow of detected fluid and caliber, be serially connected on the tested pipeline section, when pipeline section does not have fluid and flows through, turnover panel 22 and hairspring 9 do not stress, turnover panel is in the static equilibrium state, the turnover panel plane is perpendicular to the pipeline section axis, and this moment, turnover panel 22 was just shut whole flow section with fixed dam 19.

When having fluid to flow through in the flow instrument, fluid is with turnover panel 22 push-jump angular displacements, give hairspring 9 by transmission shaft 4 with this transmission of torque, make hairspring 9 produce a counter torque, and increase with the increase of current, when the kinetic moment of counter torque and current promotion turnover panel equates, turnover panel is in equilibrium state, like this, in certain flow range, the flow of fluid and the angular displacement of turnover panel are to concern one to one, by the U type magnet 15 that is fixed on the transmission shaft angular displacement is coupled to another piece U type magnet and angular displacement sensor 12 on the dividing plate again, sensor 12 is transformed into correspondent frequency (also can be transformed into voltage or electric current) signal with angular displacement signal, sends singlechip computer system to by telecommunication cable 13.

The major advantage of this turnover plate type flow instrument is: flow section is variable, measuring accuracy height, stable performance.

1, measuring accuracy height, this instrument are that the muting sensitivity limit is low, and it is to adopt thimble structure, reduce friction, use the variable flow section structure of turnover panel, as long as there is small volume of fluid to pass through, just turnover panel can be promoted an angular displacement, just can be detected by high-resolution angular displacement sensor.

2, frictional resistance is little, and this instrument adopts the hairspring thimble, agate bearing and turnover panel structure, and the resistance that can reduce friction improves measuring accuracy.

3, long service life, the mechanism that does not have high speed rotating in the instrument with flow, not being afraid of impurity stops up, be difficult for stuck and wearing and tearing, detection systems such as no similar ultrasound wave and electromagnetic flowmeter in the table, have only one simple in structure, stable performance, the angular displacement sensor that precision is high, so maintenance capacity is little, long service life.

4, applied widely, this instrument not only is suitable for the measurement of flow in all size caliber (φ 80-1200mm), and be applicable to the metering of acid, alkali, salt, water, oil and gas, under harsh conditions such as mechanical vibration, electromagnetic interference (EMI), humidity, use, all reliable and stable than the flow instrument of other types.

5, production cost is low, and this instrument does not have complicated mechanical component and electric elements, and its production cost has only about 20% of ultrasound wave or electromagnetic flowmeter cost.

6, be easy to robotization, this instrument usable frequency signal form output is directly received by microprocessor and handles, and also can convert electric current, voltage signal output to, this instrument secondary instrument adopts single-chip microcomputer, reduce cost, realize robotization easily, can be used for water factory and handle robotization, the demineralized water treatment device robotization, self-timing, quantitative water supply is in the industrial automation systems such as the signal is far passed.

Description of drawings: Fig. 1 is the front view of turnover plate type flow instrument, Fig. 2 is a vertical view, Fig. 3 is a left view, wherein 1 thimble, 2 thimble lock screws, 3 agate bearings, 4 transmission shafts, 5 driving sleeves, 6 axle sleeve clamp nuts, 7 hairspring fixed supports, 8 hairspring set screw, 9 hairsprings, 10 asbestos washers, 11 bolts, 12 angular displacement sensors, 13 telecommunication cables, 14 sensor outer covers, 15U type magnet, 16 dividing plates, 17 hairspring clamp nuts, 18 flow instrument housings, 19 fixed dams, 20 rotating shafts, 21 turnover panel set bolts, 22 turnover panels, 23 balanced weight frame clamp nuts, 24 sensor hold-down nuts, 25 balanced weight trip bolts, 26 balanced weights, 27 balanced weight supports.

Embodiment of the present utility model: by accompanying

drawing

1,2,3 manufacturing specifications is DN150 turnover plate type flow instrument, and the flow measurement scope is 0-200m ³/ h, resolution 0.050m ³/ hH ₂, error is little ± and 0.2%, the maximum displayed value 1000000m of secondary instrument ³, secondary instrument is the main frame measuring system with 8051 single-chip microcomputers.

Claims

1, a kind of turnover plate type flow instrument, mainly contain measurement mechanism, part such as angular displacement sensor and telecommunication cable, it is characterized in that it comprises thimble 1, agate bearing 3, transmission shaft 4, hairspring 9, angular displacement sensor 12, telecommunication cable 13, U type magnet 15, flow instrument housing 18, fixed dam 19, rotating shaft 20, turnover panel 22, balanced weight 26 critical pieces such as grade, wherein semicircle fixed dam 19 is fixed in the flow instrument housing 18, semicircle turnover panel 22 is fixed in the rotating shaft 20 by screw 21, rotating shaft 20 is fixed with transmission shaft 4 usefulness screws again, by agate bearing 3 and thimble 1 acting in conjunction, with rotating shaft 20 jack-up, make turnover panel 22 20 freely rotate certain angular displacement around the shaft; Hairspring 9 usefulness nuts 17 tighten together with transmission shaft 4, and the other end of hairspring 9 and fixed support 7 tighten together; U type magnet 15 is a top that is fixed on rotating shaft 4 wherein, and another piece U type magnet is fixed on the transmission shaft of sensor 12 lower ends; With dividing plate 16, packing ring 10 sensor 12 and detected fluid are separated, sensor 12 is closed in the sensor wrap 14

2, by the described turnover plate type flow instrument of claim 1, it is characterized in that turnover panel flow instrument bore is 80-1200mm.