CN109099976A

CN109099976A - Precession vortex flowmeter

Info

Publication number: CN109099976A
Application number: CN201811044230.2A
Authority: CN
Inventors: 官荣涛; 彭慧娟; 袁聪; 彭华平; 韦金燕
Original assignee: Guangzhou Noncon Automation Equipment Co ltd
Current assignee: Guangzhou Noncon Automation Equipment Co ltd
Priority date: 2018-09-07
Filing date: 2018-09-07
Publication date: 2018-12-28

Abstract

The invention relates to a precession vortex flowmeter, which comprises a flowmeter body and a controller, wherein the flowmeter body comprises a shell, a spinner, a flow probe and a switch valve, the flow probe is arranged in the shell and is used for detecting the gas flow passing through the shell, the switch valve is arranged in the shell and is used for controlling the opening and closing of the flowmeter body, the shell comprises an air inlet and an air outlet, the spinner is arranged at the air inlet of the shell, the flow probe and the switch valve are respectively and electrically connected with the controller, an accommodating cavity is arranged in the shell, the flow probe is arranged in the accommodating cavity and comprises two fixed polar plates and a movable polar plate arranged between the two fixed polar plates, and the two fixed polar plates and the movable polar plate are arranged in parallel. The precession vortex flowmeter provided by the invention can effectively reduce the influence of parasitic capacitance and improve the overall performance of the flowmeter.

Description

A kind of vortex precession flowmeter

Technical field

The present invention relates to field of flow meters, and in particular to a kind of vortex precession flowmeter.

Background technique

It is various that the industries measurements such as petroleum, chemical industry, electric power, metallurgy, city gas supply are now widely used for into vortex flowmeter The features such as gas flow has range of flow wide, and structure is simple, stain resistance, its working principle is that utilizing the vortex precession of fluid Phenomenon carries out flow measurement.Currently, well known precession spiral flowmeter (or vortex precession flow sensor) is equal in the world Using single piezo-electric crystal (or condenser type) sensor come measuring medium flow velocity frequency signal, capacitor sensor structure is simple, divides Resolution is high, but the presence of parasitic capacitance has seriously affected its working performance.

Summary of the invention

The present invention provides vortex precession flowmeters, can effectively reduce the influence of parasitic capacitance, improve the entirety of flowmeter Performance.

To achieve the above object, the present invention provides a kind of vortex precession flowmeter, including flowmeter bodies and controller, The flowmeter bodies include shell, pipe cyclone, are set in shell and for detecting the flow for passing through the gas flow of shell Pop one's head in and be set to the switch valve in shell and for controlling flowmeter bodies opening and closing, the shell include air inlet and Gas outlet, the pipe cyclone are set at the air inlet of the shell, the flow probe and switch valve respectively with the control Device electrical connection, the shell is interior to be equipped with chamber resettling, and the flow probe is set in the chamber resettling, the flow probe Including two pieces of fixed polar plates and one piece of movable polar plate being set between two pieces of fixed polar plates, two pieces of fixed polar plates and described Movable plate electrode is arranged in parallel.

Preferably, the flow probe further includes that the section that is made of one piece of horizontal version and two pieces of risers is " U "-shaped Pedestal, two pieces of fixed polar plates are fixedly installed on two medial surfaces of the pedestal, and the movable polar plate is set to two The middle position of fixed polar plate described in block, the movable plate electrode are connect with the shell by suspension and can be close to or far from any one The movement of fixed polar plate described in block.

Preferably, the inner wall of the pipe cyclone and the shell is rotatably connected, and the pipe cyclone includes leading core With multiple circumferentially uniformly distributed helical blades along the side wall for leading core.

Preferably, the flow probe is set between the pipe cyclone and switch valve, is set at the gas outlet There is rear rectifier, the rear rectifier is electrically connected with the controller.

Preferably, the controller includes opening or closing the flowmeter bodies for controlling the switch valve Control module and be set to the surface of the controller and for swiping the card or the induction zone of plug-in card, the induction zone and the control Device electrical connection processed.

Preferably, the switch valve is globe type of control valve, and the inner wall of the globe type of control valve and the shell can Rotation connection.

Preferably, the controller further includes display screen.

Preferably, the controller further include for manually control that the switch valve opens and closes it is urgent by Button.

Preferably, the steam-flow meter of the pre-payment further includes being set in the shell and for detecting shell The pressure sensor of the pressure of internal steam, the pressure sensor are electrically connected with the controller.

Preferably, the steam-flow meter of the pre-payment further includes being set in the shell and for detecting shell The temperature sensor of the temperature of internal steam, the temperature sensor are electrically connected with the controller.

A kind of vortex precession flowmeter provided by above-mentioned technical proposal carries out flow survey to the gas for being passed through flowmeter The process of amount are as follows: gas flows through pipe cyclone from air inlet entrance and is converted into powerful gyrate gas, then flows through flow spy Head detects the flow of gyrate gas, and the present invention, which passes through, will test the accommodating cavity popped one's head in and be set to positioned at enclosure interior In chamber room, realizes and further lead to the extraneous effect being relatively isolated, the influence to effectively reduce parasitic capacitance One movable plate electrode of setting between two fixed polar plates is crossed, when detecting to flow, the movable plate electrode is solid with one of them The polar moment of fixed plate reduces and the polar moment of another fixed polar plate increases, forms differential output, to realize the inspection to flow Survey while can further decrease the influence of parasitic capacitance.

Detailed description of the invention

Fig. 1 is internal structure cross-sectional view of the invention；

Fig. 2 is the structural schematic diagram of flow sensor.

Wherein: 1, induction zone；2, danger button；3, shell；4, rear rectifier；5, globe type of control valve；6, pipe cyclone；7, it flows Amount probe；8, display screen；9, controller；71, suspension；72, fixed polar plate；73, movable plate electrode；74, pedestal.

Specific embodiment

With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below Example is not intended to limit the scope of the invention for illustrating the present invention.

It is as shown in Figs. 1-2 a kind of vortex precession flowmeter provided by the present invention, including flowmeter bodies and controller 9, the flowmeter bodies include shell 3, pipe cyclone 6, are set in shell 3 and for detecting the gas flow by shell 3 Flow probe 7 and be set to the switch valve in shell 3 and for controlling flowmeter bodies opening and closing, the shell 3 wraps Air inlet and air outlet are included, the pipe cyclone 6 is set at the air inlet of the shell 3, the flow probe 7 and switch valve point It is not electrically connected with the controller 9, is equipped with chamber resettling in the shell 3, the flow probe 7 is set to the chamber resettling Interior, the flow probe 7 includes two pieces of fixed polar plates 72 and one piece of movable polar plate 73 being set between two pieces of fixed polar plates 72, Two pieces of fixed polar plates 72 and the movable plate electrode 73 are arranged in parallel.Specifically, a kind of precession rotation provided by the present embodiment Vortex meter carries out the process of flow measurement to the gas for being passed through flowmeter are as follows: gas enters from air inlet flows through 6 turns of pipe cyclone Powerful gyrate gas is turned to, flow probe 7 is then flowed through and the flow of gyrate gas is detected, the present invention is logical Crossing will test in chamber resettling's chamber for being set to positioned at shell 3 inside of probe, realize the effect being relatively isolated with the external world, from And the influence of parasitic capacitance is effectively reduced, and further, by the way that a movable plate electrode 73 is arranged between two fixed polar plates 72, When detecting to flow, the polar moment of the movable plate electrode 73 and one of fixed polar plate 72 reduces and another fixed pole The polar moment of plate 72 increases, forms differential output, to realize the detection to flow, can further decrease parasitic capacitance simultaneously It influences.

In the present embodiment, the flow probe 7 further includes that the section that is made of one piece of horizontal version and two pieces of risers is " U "-shaped Pedestal 74, two pieces of fixed polar plates 72 are fixedly installed on two medial surfaces of the pedestal 74, and the movable polar plate 73 is set It is placed in the middle position of two pieces of fixed polar plates 72, the movable plate electrode 73 is connect by suspension 71 with the shell 3 and reliable It is moved close or remote from any one piece of fixed polar plate 72.Specifically, when tested plane has certain inclination angle, since gravity is made With, movable plate electrode 73 remains vertical state, reduces with the pole span of a fixed polar plate 72, and with another plate electrode away from increase, shape At differential output, since surveyed change of pitch angle is minimum, it is believed that movable plate electrode 73 is parallel always with fixed polar plate 72, and air-flow passes through When, Capacitive Flow probe 7 will be exported continuously, to measure the flow value for flowing through the gas of flowmeter.

Further, since the gas being passed through in shell 3 is not necessarily under mark condition the (gas parameter under mark condition are as follows: pressure Power is 101.325kPa, and temperature is 0 DEG C), to make to mark the stream under condition using flowmeter institute's measurement of discharge provided by the present embodiment Magnitude, in the present embodiment, the steam-flow meter of the pre-payment further includes being set in the shell 3 and for detecting shell 3 The pressure sensor of the pressure of interior steam, the pressure sensor are electrically connected with the controller 9, the steam stream of the pre-payment Meter further includes the temperature sensor for being set in the shell 3 and be used to detect the temperature of steam in shell 3, and the temperature passes Sensor is electrically connected with the controller 9, detects the reality of the gas inside shell 3 respectively by pressure sensor and temperature sensor Border pressure and temperature, and will test result and feed back to controller 9, controller 9 is conversed automatically and is passed through inside shell 3 in the case where marking condition The flow value of gas.

In the present embodiment, the inner wall of the pipe cyclone 6 and the shell 3 is rotatably connected, and the pipe cyclone 6 includes leading core With multiple circumferentially uniformly distributed helical blades along the side wall for leading core, realized by pipe cyclone 6 to shell will be entered from air inlet The powerful gyrate gas that is converted into of the gas of body 3 effectively raises so that the signal that flow probe 7 obtains is stronger Flow probe 7 has been correspondingly improved range ability to the measurement lower limit of fluid.

Further, the flow probe 7 is set between the pipe cyclone 6 and switch valve, is equipped at the gas outlet Rectifier 4 afterwards, the rear rectifier 4 is electrically connected with the controller 9, by rectifier 4 after setting, so that gas in shell 3 It is relatively isolated with the ambient atmos of gas outlet one end and then guarantees the gas between the pipe cyclone 6 and rear rectifier 4 in vortex Shape.

Further, the controller 9 includes opening or closing the flowmeter bodies for controlling the switch valve Control module and be set to the surface of the controller 9 and for swiping the card or the induction zone 1 of plug-in card, the induction zone 1 and institute State the electrical connection of controller 9.When user needs using gas, first need to be stuck in institute using the gas flow for prestoring certain amount of money The card slot that induction zone 1 swipes the card or gas flow card insertion is entered to induction zone 1 is stated, then control module controls the switch valve and opens Beginning, control module is used according to the remaining amount of money in the gas flow card being used for for being equipped with corresponding flow gas supply simultaneously The amount upper limit, the flow probe 7 detects the flow for flowing through the gas of flowmeter, when the gas flow for flowing through flowmeter reaches institute When stating the amount upper limit that flow uses, the control module automatically controls the switch valve and closes, while controller 9 reminds user Sorry, your ticket has not enough value in card.The above process, user need to first swipe the card and use gas afterwards, and flowmeter is from dynamic circuit breaker after remaining sum use in subscriber card Gas reduces the input of manpower and material resources simultaneously so that it is guaranteed that the theory of " first paying the fees, afterwards with gas " is achieved.

In the present embodiment, the switch valve is globe type of control valve 5, and the inner wall of the globe type of control valve 5 and the shell 3 can It is rotatablely connected and is set between the flow probe 7 and gas outlet, by selecting globe type of control valve 5 can be with the inner wall of shell 3 The problem of being bonded completely, preventing gas leakage.

Further, the controller 9 further includes display screen 8, the display screen 8 can Dynamically Announce residue can gas consumption With the information such as residual amount and all measurement parameters, when can gas consumption be zero (i.e. the amount of money is zero) when, the flowmeter from Dynamic circuit breaker gas.To further increase the safety comprising the flowmeter, the controller 9 further includes for manually controlling the switch The danger button 2 that valve opens and closes can be manually controlled when emergency (such as gas leakage) occurs by the danger button 2 The switch valve opens and closes flowmeter.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.

The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement Also it should be regarded as protection scope of the present invention.

Claims

1. A precession vortex flowmeter is characterized in that it includes a flowmeter body and a controller, and the flowmeter body includes a housing, a spinner, and is arranged in the housing and is used to detect the flow rate of the gas flow through the housing The probe and the switching valve arranged in the housing and used to control the opening and closing of the flowmeter body, the housing includes an air inlet and an air outlet, the spinner is arranged at the air inlet of the housing, the The flow probe and the switching valve are respectively electrically connected to the controller, and the housing is provided with a housing chamber, and the flow probe is arranged in the housing chamber, and the flow probe includes two fixed plates and a The movable polar plate is arranged between the two fixed polar plates, and the two fixed polar plates and the movable polar plate are arranged in parallel.

2. The precession vortex flowmeter according to claim 1, characterized in that, the flow probe also includes a base with a U-shaped cross-section consisting of a horizontal plate and two vertical plates, and the two fixed The pole plates are fixedly arranged on the two inner sides of the base, the movable pole plate is arranged in the middle of the two fixed pole plates, and the movable pole plate is connected with the housing through a suspension wire and can be approached Or move away from any one of the fixed pole plates.

3. The precession vortex flowmeter according to claim 1, wherein the spinner is rotatably connected to the inner wall of the housing, and the spinner includes a guide core and a plurality of Circumferentially uniform helical blades on the sidewall of the core.

4. The precession vortex flowmeter according to claim 1, wherein the flow probe is arranged between the spinner and the switch valve, and a rear rectifier is provided at the air outlet, and the rear rectifier Electrically connected with the controller.

5. The precession vortex flowmeter according to claim 1, characterized in that, the controller comprises a control module for controlling the on-off valve to open or close the flowmeter body and a control module provided on the controller The surface is also used for the induction area of swiping or inserting the card, and the induction area is electrically connected with the controller.

6 . The precession vortex flowmeter according to claim 1 , wherein the on-off valve is a spherical control valve, and the spherical control valve is rotatably connected to the inner wall of the casing.

7. The precession vortex flowmeter according to claim 1, wherein the controller further comprises a display screen.

8. The precession vortex flowmeter according to claim 1, wherein the controller further comprises an emergency button for manually controlling the opening and closing of the switching valve.

9. The precession vortex flowmeter according to claim 1, wherein the prepaid steam flowmeter further comprises a pressure sensor arranged in the housing and used to detect the pressure of the steam in the housing, the pressure The sensor is electrically connected with the controller.

10. The precession vortex flowmeter according to claim 1, characterized in that, the prepaid steam flowmeter further comprises a temperature sensor arranged in the housing and used to detect the temperature of the steam in the housing, the temperature The sensor is electrically connected with the controller.