CN201527283U

CN201527283U - Novel high accuracy turbine volumetric type flowmeter

Info

Publication number: CN201527283U
Application number: CN2009202796570U
Authority: CN
Inventors: 姜耀龙
Original assignee: SHANGHAI FANGLONG FLUX TESTING EQUIPMENT MANUFACTURE CO Ltd
Current assignee: SHANGHAI FANGLONG FLUX TESTING EQUIPMENT MANUFACTURE CO Ltd
Priority date: 2009-11-07
Filing date: 2009-11-07
Publication date: 2010-07-14
Anticipated expiration: 2019-11-07

Abstract

The utility model relates to a novel high accuracy turbine volumetric type flowmeter, including a housing, a locking nut, a guide cylinder, a sensor, a bearing, a turbine rotator body, a magnetic steel, a long lead deep groove and a large spiral turbine sheet; the housing is H-shaped; the locking nut connects the guide cylinder on the housing; there are two guide cylinders; one end of the guide cylinder is connected to the locking nut and the other end is connected to the bearing; the sensor is arranged in the center of the housing; the bearing is arranged on two ends of the long lead deep groove; the turbine rotator body is arranged on the external side of the long lead deep groove; the magnetic steel is equipped on the turbine rotator body; and the large spiral turbine sheet is disposed inside the long lead deep groove. Compared with the prior art, the utility model combines the advantages of comprehensive speed type and volumetric type instruments, such as simple mechanism, small pressure loss, high sensitivity, low cost, good stability, high precision, low requirement to medium purity and no requirement to front and rear straight tube sections in installation; and the flowmeter can measure instantaneous flow and accumulated flow.

Description

A kind of novel high-precision turbine volumeter

Technical field

The utility model relates to a kind of flowmeter, especially relates to a kind of novel high-precision turbine volumeter.

Background technology

Flow instrument is to be used to measure the instrument that flows through the total amount (but also claiming integrated flux) of cross-section of pipeline in liquid (or gas) in the closed conduct flows through cross-section of pipeline in the unit interval amount (claim not only instantaneous delivery) and certain period.

Flow instrument divides two big classes in principle both at home and abroad at present: a class is called the speed mode instrument, count the typical case with turbine flow, a rotor is often arranged in this instrument, when flowing through instrument, fluid promotes the rotor rotation, obtain the rotor gyro frequency by sensor, this frequency is directly proportional with the speed that fluid flows through cross-section of pipeline, obtains the instantaneous delivery that fluid flows in pipeline thus.This meter sensitivity height, the pressure loss is little, and is simple in structure, with low cost.But because the rotor of itself, therefore bearing arrangement has relatively high expectations to the degree of purity of medium, promptly can not contain a bit impurity in the medium, otherwise rotor will be stuck.This instrument can only be applied to water, and milk and finished product wet goods medium can not be applied to a large amount of media that contain impurity (such as former wet goods) that use on the commercial production.Long-term in addition use can make rotor, bearing wear, and instrument coefficient changes, the instrument poor stability.The velocity distribution of this instrument convection cell on cross-section of pipeline is very responsive, therefore in order to guarantee measurement verification and the actual consistance of using, often require the instrument front and back that the straight length of certain-length is arranged, this brings very big trouble for installation, design in actual the use.

Second class claims the positive displacement instrument, with rotz flowmeter, oval gear flowmeter is representative, in this instrument measurement chamber is arranged, after flow is filled measurement chamber,, the chamber inner fluid is flowed to the downstream by the cavity rotation, so measure the flow total amount that the measurement chamber number of revolutions can obtain to flow to by instrument the downstream, therefore the positive displacement instrument measurement is integrated flux, and this metering instrument precision is higher, good stability, require lower to the medium degree of purity, but complex structure, cost are quite high, and the pressure loss is big, sensitivity is lower, and instrument structure is huge.

Summary of the invention

The purpose of this utility model is exactly the novel high-precision turbine volumeter that a kind of simple in structure, highly sensitive, good stability is provided in order to overcome the defective that above-mentioned prior art exists.

The purpose of this utility model can be achieved through the following technical solutions:

A kind of novel high-precision turbine volumeter, it is characterized in that, this flowmeter comprises housing, set nut, guide shell, sensor, bearing, the turbine rotor body, magnet steel, big helical pitch deep trouth and king bolt turbine wheel, described housing is " H " type, described set nut is connected guide shell on the housing, described guide shell has two, this guide shell one end connects set nut, other end connection bearing, described sensor is located at the housing middle part, described bearing is located at the two ends of big helical pitch deep trouth, described turbine rotor body is located at the outside of big helical pitch deep trouth, described magnet steel is located on the turbine rotor body, and described king bolt turbine wheel is located at big helical pitch deep trouth inside.

The end face of described novel high-precision turbine volumeter is the turbine shape.

Described king bolt turbine wheel adopts the blade of turbine form.

Compared with prior art, the utility model has the advantage of speed mode instrument and positive displacement instrument simultaneously concurrently, has abandoned the shortcoming of two class instrument simultaneously, and its advantage is as follows:

(1) simple in structure, highly sensitive, with low cost;

There is not the straight length requirement of instrument front and back when (2) installing;

(3) pressure loss is little;

(4) require low to the medium degree of purity;

(5) precision is higher;

(6) both instantaneous delivery can be measured, integrated flux can be measured again;

(7) all can only unidirectionally measure with respect to speed mode, positive displacement instrument, the utility model can carry out bidirectional measurement.

Description of drawings

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

1 is that housing, 2 is that set nut, 3 is that guide shell, 4 is that sensor, 5 is that bearing, 6 is that turbine rotor body, 7 is that magnet steel, 8 is that big helical pitch deep trouth, 9 is the king bolt turbine wheel among the figure.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

Embodiment

A kind of novel high-precision turbine volumeter, its structure as shown in Figure 1, this flowmeter comprises housing 1, set nut 2, guide shell 3, sensor 4, bearing 5, turbine rotor body 6, magnet steel 7, big helical pitch deep trouth 8 and king bolt turbine wheel 9, the end face of this novel high-precision turbine volumeter is the requirement of turbine shape and unmatched when mounted back straight length, housing 1 is " H " type, set nut 2 is connected guide shell 3 on the housing 1, guide shell 3 has two, these guide shell 3 one ends connect set nut 2, other end connection bearing 5, sensor 4 is located at the middle part of housing 1, bearing 5 is located at the two ends of big helical pitch deep trouth 8, turbine rotor body 6 is located at the outside of big helical pitch deep trouth 8, magnet steel 7 is located on the turbine rotor body 6, king bolt turbine wheel 9 is located at the inside of big helical pitch deep trouth 8, and king bolt turbine wheel 9 adopts the rotary power of the blade of turbine form as turbine rotor body 6.This novel high-precision turbine volumeter has following technical essential:

(1) adopt the blade face of turbine form to make the rotor rotary power;

(2) end face is the turbine form, improves meter sensitivity and reduces the pressure loss again;

(3) big helical pitch deep trouth describes that the chamber makes instrument have the volumeter characteristic, has guaranteed the instrument reliability, and the instrument installation requirement is reduced, straight length requirement before and after the no instrument;

(4) reduce wastage by the cylindrical outer diameters size and with the machining control of inner walls gap value, improve precision;

(5) adopt rotor diameter and round buss sealed rectangular groove to constitute the metered volume that two volumes equate;

(6) special bearing arrangement makes it wear-resisting, guarantees the long-time stability of instrument and is difficult for obstruction, alleviates the requirement of measuring media degree of purity.

Principle of work of the present utility model is as follows:

After liquid is full of pipeline inflow instrument, the guide shell 3 that is fixed in the housing 1 by the nut 2 that is locked flows, make the liquid stream end face of impulse turbine form more stably, drive bearing 5 rotations, make 6 rotations of turbine rotor body, liquid excessive helical turbine sheet 9 forced fluid flow that circulate turn clockwise for 8 li at big helical pitch deep trouth, discharge by other end guide shell.

When big helical pitch deep trouth is cavity volume 8 rotations, magnet steel 7 on the turbine rotor body 6 makes sensor 4 send pulse, the at interval interior pulse sum of umber of pulse that record unit time inner sensor 4 sends and certain hour can be obtained instantaneous delivery and integrated flux that fluid flows in pipeline.

Claims

1. novel high-precision turbine volumeter, it is characterized in that, this flowmeter comprises housing, set nut, guide shell, sensor, bearing, the turbine rotor body, magnet steel, big helical pitch deep trouth and king bolt turbine wheel, described housing is " H " type, described set nut is connected guide shell on the housing, described guide shell has two, this guide shell one end connects set nut, other end connection bearing, described sensor is located at the housing middle part, described bearing is located at the two ends of big helical pitch deep trouth, described turbine rotor body is located at the outside of big helical pitch deep trouth, described magnet steel is located on the turbine rotor body, and described king bolt turbine wheel is located at big helical pitch deep trouth inside.

2. a kind of novel high-precision turbine volumeter according to claim 1 is characterized in that the end face of described novel high-precision turbine volumeter is the turbine shape.

3. a kind of novel high-precision turbine volumeter according to claim 1 is characterized in that, described king bolt turbine wheel adopts the blade of turbine form.