CN203572521U

CN203572521U - Flowmeter capable of enlarging measuring range online

Info

Publication number: CN203572521U
Application number: CN201320763786.3U
Authority: CN
Inventors: 陈秉焕
Original assignee: XIAMEN KAIXUN TECHNOLOGY Co Ltd
Current assignee: XIAMEN KAIXUN TECHNOLOGY Co Ltd
Priority date: 2013-11-27
Filing date: 2013-11-27
Publication date: 2014-04-30
Anticipated expiration: 2023-11-27

Abstract

The utility model discloses a flowmeter capable of enlarging a measuring range online, and relates to the flowmeter. The flowmeter is provided with a main flow channel pipe, a sensor flow channel pipe, an adjustor front end, a screw rod, an adjustor front-end nut, a spring, a front bearing seat, a flow sensor, a driven gear, a drive gear, a stepping motor, a drive shaft, a drive module, a single-chip microcomputer, a display, a data storage device, a rear bracket, an adjuster rear seat, a rear bearing, a rear bearing seat, a bracket, a front bearing and a positioning pin; the flow ratio of a main flow channel to a flowmeter flow channel can be adjusted online; the measuring range of the flowmeter is enlarged; the adjustor is streamlined, so that fluid is stable and is kept in a laminar flow state; data are tested or calculated by adopting the data storage device; the flow ratio of the main flow channel pipe to the sensor flow channel pipe is adjusted in real time by the single-chip microcomputer according to flow range calling during measurement, so that the flow ratio can be enlarged online; the measuring precision is high; the flowmeter can be widely applied to measurement of various fluids.

Description

A kind of flowmeter of range extension online

Technical field

The utility model relates to a kind of flowmeter, especially relates to a kind of flowmeter of range extension online.

Background technology

The flow measuring apparatus scope that is widely used, the common method that for example adopts cooling method to measure rate of flow of fluid flow comprises: utilize semiconductor thermistor or tinsel to provide heating power in higher than environment temperature state by external power, detected fluid flow rate changes and causes that its thermal equilibrium temperature changes, the resistance change of output reflection measured parameter; Another kind is that the flow rate that utilizes the junction voltage of junction semiconductor device under the heated condition higher than environment temperature to characterize detected fluid changes, or with the flow rate variation of the variable quantity sign detected fluid of junction semiconductor device heats power under certain condition.

In the metering of fluid flow, when fluctuations in discharge is larger, can adopt the flowmeter of wide range to detect, or adopt the main bypass of fixed proportion to detect, but in low discharge, measuring accuracy is very low, even there is no reading.

Chinese patent CN101738230A discloses a kind of low-speed hot fluid flowmeter.Comprise along fluid flow direction and be arranged on heat-conducting unit and the fluid temperature (F.T.) detecting unit on fluid line to be measured, described heat-conducting unit and fluid temperature (F.T.) detecting unit level are arranged on to be treated in pipeline that fluid measured flows through, and heat-conducting unit is arranged on upstream, fluid temperature (F.T.) detecting unit is arranged on downstream.

Summary of the invention

The purpose of this utility model is to provide a kind of flowmeter of range extension online.

The utility model is provided with primary flow path pipe, sensor stream pipe, regulator front end, screw mandrel, regulator front end nut, spring, front-end bearing pedestal, flow sensor, driven gear, driving gear, stepper motor, driving shaft, driver module, single-chip microcomputer, display, data-carrier store, after-poppet, regulator back seat, rear bearing, rear bearing block, support, front bearing and register pin; Described sensor stream pipe is in parallel with primary flow path pipe, for expanding the range of flow sensor, in primary flow path pipe, be provided with one section of streamline tube that diameter is larger, streamlined regulator is housed in streamline tube, described regulator is divided into regulator front end and regulator back seat, and regulator back seat is fixed in primary flow path pipe with support and after-poppet, and stepper motor is located on primary flow path pipe, stepper motor is equipped with driving shaft, and driving gear is equipped with in driving shaft lower end; Screw mandrel is housed in regulator, front bearing and rear bearing are housed on screw mandrel, front bearing is fixed on front-end bearing pedestal, and rear bearing is fixed on rear bearing block, and front-end bearing pedestal and rear bearing block are separately fixed in regulator back seat; Screw mandrel right-hand member is equipped with driven gear, driven gear and driving gear engagement, and on screw mandrel, cover has regulator front end nut, and regulator front end nut is fixed on regulator front end, and screw mandrel driving regulator front end stretches and can not rotate along register pin; Spring and front-end bearing pedestal tension, to reduce machine error; Single-chip microcomputer connection traffic sensor, driver module, display and data-carrier store; Driver module connects stepper motor.

In the metering of fluid flow, when fluctuations in discharge is larger, can adopt the flowmeter of wide range to detect, or adopt the main bypass of fixed proportion to detect, but in low discharge, measuring accuracy is very low, even there is no reading, and the utility model provides a kind of flowmeter of range extension online, can adjust online the flow proportional of primary flow path and flowmeter stream, expand the range of flowmeter, its regulator is streamlined, make fluid more steady, remain on laminar condition, adopt data storage calibrating or computational data, during metering, by single-chip microcomputer, according to flow range, called, adjust in real time the throughput ratio of primary flow path pipe and sensor stream pipe, both can expand online the ratio of flow, measuring accuracy is high again, can be widely used in the metering of various fluids.

Accompanying drawing explanation

Fig. 1 is that the structure of the utility model embodiment forms schematic diagram.

Embodiment

Referring to Fig. 1, the utility model embodiment is provided with primary flow path pipe 1, sensor stream pipe 2, regulator front end 3, screw mandrel 4, regulator front end nut 5, spring 6, front-end bearing pedestal 7, flow sensor 8, driven gear 9, driving gear 10, stepper motor 11, driving shaft 12, driver module 13, single-chip microcomputer 14, display 15, data-carrier store 16, after-poppet 17, regulator back seat 18, rear bearing 19, rear bearing block 20, support 21, front bearing 22 and register pin 23; Described sensor stream pipe 2 is in parallel with primary flow path pipe 1, for expanding the range of flow sensor, in primary flow path pipe 1, be provided with one section of streamline tube that diameter is larger, streamlined regulator is housed in streamline tube, described regulator is divided into regulator front end 3 and regulator back seat 18, and regulator back seat 18 use supports 21 and after-poppet 17 are fixed in primary flow path pipe 1, and stepper motor 11 is located on primary flow path pipe 1, stepper motor 11 is equipped with driving shaft 12, and driving gear 10 is equipped with in driving shaft 12 lower ends; Screw mandrel 4 is housed in regulator, front bearing 22 and rear bearing 19 are housed on screw mandrel 4, front bearing 22 is fixed on front-end bearing pedestal 7, and rear bearing 19 is fixed on rear bearing block 20, and front-end bearing pedestal 7 and rear bearing block 20 are separately fixed in regulator back seat 18; Screw mandrel 4 right-hand members are equipped with driven gear 9, driven gear 9 and driving gear 10 engagements, and on screw mandrel 4, cover has regulator front end nut 5, and regulator front end nut 5 is fixed on regulator front end 3, and screw mandrel 4 driving regulator front ends 3 stretch and can not rotate along register pin 23; Spring 6 and front-end bearing pedestal 7 tensions, to reduce machine error; Single-chip microcomputer 14 connection traffic sensors 8, driver module 13, display 15 and data-carrier store 16; Driver module 13 connects stepper motor 11.In Fig. 1, the direction of arrow represents fluid flow direction.

Below provide scaling method of the present utility model:

After a kind of specification is made, series connection proving flowmeter, the output of proving flowmeter is connected with interface microcontroller.Flow is demarcated to full scale gamut primary flow path pipe circulation from minimum 0～100%, and by the adjusted value of data and the stepper motor corresponding data-carrier store that is kept at one by one; Can not demarcate, according to architectural feature, by calculating, characteristic parameter is kept to data-carrier store yet; During measurement, single-chip microcomputer is adjusted regulator front end by stepper motor, makes sensor detect data in the more suitable scope of range; Single-chip microcomputer, from data-carrier store read data, is passed to display and is shown flow number; When fluctuations in discharge is larger, single-chip microcomputer sends instructions and adjusts; Therefore can accomplish very wide range, can adjust online again, both practical, there is again very high measuring accuracy.

Claims

1. a flowmeter for range extension online, is characterized in that being provided with primary flow path pipe, sensor stream pipe, regulator front end, screw mandrel, regulator front end nut, spring, front-end bearing pedestal, flow sensor, driven gear, driving gear, stepper motor, driving shaft, driver module, single-chip microcomputer, display, data-carrier store, after-poppet, regulator back seat, rear bearing, rear bearing block, support, front bearing and register pin; Described sensor stream pipe is in parallel with primary flow path pipe, for expanding the range of flow sensor, in primary flow path pipe, be provided with one section of streamline tube that diameter is larger, streamlined regulator is housed in streamline tube, described regulator is divided into regulator front end and regulator back seat, and regulator back seat is fixed in primary flow path pipe with support and after-poppet, and stepper motor is located on primary flow path pipe, stepper motor is equipped with driving shaft, and driving gear is equipped with in driving shaft lower end; Screw mandrel is housed in regulator, front bearing and rear bearing are housed on screw mandrel, front bearing is fixed on front-end bearing pedestal, and rear bearing is fixed on rear bearing block, and front-end bearing pedestal and rear bearing block are separately fixed in regulator back seat; Screw mandrel right-hand member is equipped with driven gear, driven gear and driving gear engagement, and on screw mandrel, cover has regulator front end nut, and regulator front end nut is fixed on regulator front end, and screw mandrel driving regulator front end stretches and can not rotate along register pin; Spring and front-end bearing pedestal tension, to reduce machine error; Single-chip microcomputer connection traffic sensor, driver module, display and data-carrier store; Driver module connects stepper motor.