CN2789732Y

CN2789732Y - Portable intelligent digital display micro-flowmeter

Info

Publication number: CN2789732Y
Application number: CN 200420054152
Authority: CN
Inventors: 骆成汉
Original assignee: HUIFENG SHIPPING ACCESSORY MANUFACTURING Co Ltd CHANGZHOU CITY
Current assignee: HUIFENG SHIPPING ACCESSORY MANUFACTURING Co Ltd CHANGZHOU CITY
Priority date: 2004-12-08
Filing date: 2004-12-08
Publication date: 2006-06-21
Anticipated expiration: 2014-12-08

Abstract

The utility model relates to a portable intelligent digital display micro flowmeter. The utility model comprises a cabinet, a throttling device, a pressure transmitter, a programmable controller and a display, wherein the cabinet is provided with a handle, the throttling device, the pressure transmitter, the programmable controller and the display are arranged inside the cabinet; the throttling device is composed of a housing and a flow hole plate, wherein the flow hole plate is fixed in the housing, and throttling holes of the flow hole plate are smaller than 5 mm; a high-pressure cavity and a low-pressure cavity of the housing are respectively communicated with an inlet valve and an outlet valve through side pressure pipes, the high-pressure cavity and the low-pressure cavity of the housing are respectively connected with an input interface of the pressure transmitter through a high-pressure pressure-taking pipeline and a low-pressure pressure-taking pipeline, and the high-pressure pressure-taking pipeline is connected with a manometer. Besides, an output interface of the pressure transmitter is connected with an input interface of the programmable controller, an output interface of the programmable controller is connected with the display and flowrate data after pressure signals are processed is displayed on the display. The utility model can accurately measure instantaneous flowrate and accumulated flowrate of fluid under setting working pressure, and the utility model has the characteristics of small size, light weight, convenient and simple operation.

Description

Portable intelligent digital display micro flowmeter

Technical field

The utility model relates to a kind of digital display micro flowmeter, especially relates to a kind of intelligent digital micro flowmeter that can carry.

Background technology

When fluid with the flow of the pressure of 0.015MPa and 0～5L/min during by pipeline, relatively low because of Reynolds number, make the pressure reduction of the forward and backward both sides of throttling orifice plate less, difficulty more when therefore especially the pipeline tiny flow quantity under this slight pressure being measured.A kind of to the flow measurement of this slight pressure difference at present is that the water column scale reads the pressure reduction variation in the employing visual observations glass tube, this flow detector not only error is bigger, the connection of signal piping is comparatively loaded down with trivial details, and needs to calculate the acquisition fluid flow by flow formula.Another kind of flowmeter is to adopt the glass ball float flowmeter, because it is relatively poor to measure precision, the connection of same signal piping is also very loaded down with trivial details.The flowmeter of above-mentioned two kinds of structures also exists and can't detect the working pressure of pipeline, control and regulate, and therefore also can't detect under the regulation working pressure, and fluid flow changes.

Summary of the invention

The purpose of this utility model provides a kind of the setting under the working pressure, can accurately measure the instantaneous delivery and the integrated flow of fluid, has little, in light weight, the simple to operation portable intelligent digital display micro flowmeter of volume.

The utility model is that the technical scheme that achieves the above object is: a kind of portable intelligent digital display micro flowmeter, comprise the cabinet that has handle and be installed in the interior restriction device of cabinet, pressure unit, Programmable Logic Controller and display, described restriction device is by housing and be fixed on throttle orifice in the housing and constitute less than the throttling orifice plate of 5mm, the high pressure chest of housing and low-pressure cavity by piezometric tube with advance, going out valve is communicated with, and the high pressure chest of housing also is connected with the input interface of pressure unit with low pressure pressure pipeline by high pressure pressure pipeline respectively with low-pressure cavity, and also be connected to tensimeter on the high pressure pressure pipeline, the pressure unit output interface connects the input interface of Programmable Logic Controller, and the output interface of Programmable Logic Controller connects display, data on flows after the pressure signal processing is presented on the display, and the built-in power of cabinet connects pressure unit respectively, Programmable Logic Controller and display.

The utility model adopts the advantage after the technique scheme to be: 1, in setting working pressure range, can accurately measure the instantaneous delivery and the integrated flow of fluid.Restriction device of the present utility model adopts the pore type throttling orifice plate, the characteristics little at the detected fluid flow, that flow velocity is low, the high pressure chest of housing and the small pressure reduction of low-pressure cavity can better be embodied, improve flowmeter test precision and reliability, reduce measuring error.2, can directly control and show the working pressure of tested pipeline.The utility model can directly be controlled the working pressure of tested pipeline fluid, and can directly show the pipeline force value by tensimeter by regulating and control the aperture size of imported valve, can accurately be determined at the flow size under this working pressure.3, easy to operate.The utility model has adopted Programmable Logic Controller and display, can show moment flow and integrated flow, storage test data and print according to request for utilization, can set functions such as full level alarm and low alarm, demonstration electric weight as requested.4, reasonable in design, volume is little, be easy to carry.The utility model with restriction device, piezometric tube, pressure pipeline and pressure unit, Programmable Logic Controller and display design in a cabinet, pressure, pressure measurement, processing and display layout's science, volume is little, is easy to carry.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

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

Fig. 2 is the structural representation of the utility model restriction device.

Wherein: the 1-flexible pipe; The 2-outlet valve; The 3-piezometric tube; The 4-cabinet; The 4-1-handle; The 5-pressure unit; The 6-Programmable Logic Controller; The 7-display; The 8-tensimeter; The 9-power supply; The 10-restriction device; The 10-1-housing; The 10-2-throttling orifice plate; The 10-3-high pressure chest; The 10-4-low-pressure cavity; 11-low pressure pressure pipeline; 12-high pressure pressure pipeline; 13---piezometric tube; The 14-imported valve.

Embodiment

See shown in Figure 1ly, portable intelligent digital display micro flowmeter of the present utility model comprises the cabinet that has 4 and is installed in restriction device 10, pressure unit 5, Programmable Logic Controller 6 and display 7 in the cabinet 4.See shown in Figure 2, restriction device 10 of the present utility model is made of housing 10-1 and the throttling orifice plate 10-2 that is fixed in the housing 10-1, the high pressure chest 10-3 of housing 10-1 is connected with outlet valve 2 with imported valve 14 with 3 by piezometric tube 13 respectively with low-pressure cavity 10-4, and the

piezometric tube

13 and 3 that high pressure chest 10-3 and the low-pressure cavity 10-4 of the throttle orifice on the throttling orifice plate 10-2 by its both sides makes both sides communicates.The aperture of the utility model throttle orifice is less than 5mm, and preferably the aperture of throttle orifice when the slight pressure fluid passes through this throttle orifice, produces small pressure reduction less than 3mm between high pressure chest 10-3 and low-pressure cavity 10-4, so that measure.The utility model all is connected with external tested pipeline by flexible pipe 1 easily at the outboard end of imported valve 14 and outlet valve 2.The utility model also is connected with the input interface of pressure unit 5 with low pressure pressure pipeline 11 by high pressure pressure pipeline 12 respectively with low-pressure cavity 10-4 at high pressure chest 10-3, the output interface of pressure unit 5 connects the input interface of Programmable Logic Controller 6, and the output interface of Programmable Logic Controller 6 connects display 7, pressure unit 5 of the present utility model, Programmable Logic Controller 6 and display 7 all are the commercially available prod, pressure unit 5 adopts lower range, high sensitivity diaphragm type pressure unit, accuracy of detection in dependable flow, pressure unit 5 is delivered to Programmable Logic Controller 6 with the pressure difference signal that collects with the electric signal of 4-20mA, Programmable Logic Controller 6 operations behind the write-in program, data after handling are delivered to display 7, directly show moment flow and integrated flow, and flow signal is stored.The utility model can external computing machine or printer, printing, record automatically by a plurality of output interfaces of Programmable Logic Controller 6.When higher limit of surpass setting when flow value or lower limit, flowmeter is audible and visible alarm directly, surpasses limit value to inform flow, and the prompting operating personnel in time adjust the aperture of imported valve 14, and the size of flow is remained in the scope of setting.The built-in power 9 of the utility model cabinet 4 is made of charger and accumulator, the direct supply of 24V is provided for respectively pressure unit 5, Programmable Logic Controller 6 and display 7, its accumulator can adopt the lithium ion battery group, it is big to have capacity, the long service life characteristics, but once electricity continuous working 72 hours filled.

During work, by flexible pipe 1 external tested pipeline, energized, close outlet valve 2, regulate the aperture of imported valve 14, pressure is presented on the tensimeter 8, when being adjusted to the working pressure of setting, open outlet valve 2, can carry out flow rate test, when hydrodynamic pressure is overproof, in time regulate working pressure, flow is remained in the scope of setting, check line pressure and traffic conditions at any time.

Claims

1, a kind of portable intelligent digital display micro flowmeter, it is characterized in that: comprise the cabinet (4) that has handle (4-1) and be installed in the interior restriction device (10) of cabinet (4), pressure unit (5), Programmable Logic Controller (6) and display (7), described restriction device (10) is by housing (10-1) and be fixed on throttling orifice plate (10-2) formation of the interior throttle orifice of housing (10-1) less than 5mm, the high pressure chest (10-3) of housing (10-1) and low-pressure cavity (10-4) are by piezometric tube (13), (3) be communicated with imported valve (14) and outlet valve (2), and the high pressure chest (10-3) of housing (10-1) also is connected with the input interface of low pressure pressure pipeline (11) with pressure unit (5) by high pressure pressure pipeline (12) respectively with low-pressure cavity (10-4), and also be connected to tensimeter (8) on the high pressure pressure pipeline (12), pressure unit (5) output interface connects the input interface of Programmable Logic Controller (6), and the output interface of Programmable Logic Controller (6) connects display (7), data on flows after the pressure signal processing is presented on the display (7), and the built-in power (9) of cabinet (4) connects pressure unit (5) respectively, Programmable Logic Controller (6) and display (7).

2, portable intelligent digital display micro flowmeter according to claim 1, it is characterized in that: the output interface of described Programmable Logic Controller (6) also is connected to audible-visual annunciator.

3, portable intelligent digital display micro flowmeter according to claim 1, it is characterized in that: the throttle orifice aperture of described throttling orifice plate (10-2) is less than 3mm.

4, portable intelligent digital display micro flowmeter according to claim 1 is characterized in that: the outer end of described imported valve (14) and outlet valve (2) all is connected to flexible pipe (1).

5, portable intelligent digital display micro flowmeter according to claim 1, it is characterized in that: described power supply (9) is made of charger and accumulator.