CN200979421Y

CN200979421Y - A vortex flowmeter with temperature compensation

Info

Publication number: CN200979421Y
Application number: CN 200620048917
Authority: CN
Inventors: 陈宝荣; 颜建渭
Original assignee: Shanghai Xingkong Automation Instrumentation Co Ltd
Current assignee: Shanghai Xingkong Automation Instrumentation Co Ltd
Priority date: 2006-12-13
Filing date: 2006-12-13
Publication date: 2007-11-21
Anticipated expiration: 2016-12-13

Abstract

A high intelligent and integrating temperature-compensating vortex street flow gauge is provided. When measuring steam with the vortex street flow gauge, the outer coordination of a temperature transmitter is not needed, and the structure technique is simple. The utility model comprises a casing, an integrating instrument and a vortex generator, wherein the vortex generator is arranged in the casing, the casing and the integrating instrument are connected through a connecting rod, the connecting rod is arranged with a flow sensor, one end of which is connected with the integrating instrument, and a flow probe of the flow sensor is inserted in the casing and the back of the vortex generator. The utility model further comprises a temperature inversion device, which comprises a chip, a power supplying circuit, a temperature sampling circuit, an enlarging and shaping circuit, a keyboard circuit and a LCD displaying circuit. Through the inner arrangement of a flow formula and a saturated steam temperature-density meter on the mounted temperature inversion device, the mass flow is worked out and sent to display in the LCD. The utility model is supplied with power by electricity supply, without outer matching with the temperature transmitter and the connecting wire, thereby having the advantages of simple structure, low cost and convenient installment and utilization.

Description

A kind of vortex shedding flow meter of temperature compensation

Technical field

The utility model relates to the integral intelligent vortex shedding flow meter of a kind of industrial automation field with the band temperature compensation.

Background technology

Vortex shedding flow meter is a kind of fluid oscillation formula new flowmeter, when medium flows through vortex generation body with certain speed, produces a vortex band of alternately arranging in back, vortex generation body both sides, is referred to as " Karman vortex street ".Because vortex generation body both sides alternately produce vortex, so produce pressure fluctuation in vortex generation body both sides, thereby make detection bodies produce alterante stress, be encapsulated in the interior piezolectric crystal unit of detection bodies under the effect of alterante stress, produce alternation charge signal with the vortex same frequency, amplifier with this charge signal amplify, filtering, shaping, the pulse signal that last output frequency is directly proportional with velocity of medium is delivered to integrating meter and is processed and displayed.It has that measurement range is wide, crushing is little, stable performance, accuracy is high and advantage such as easy to install; Be widely used in sealing the measurement of liquid in the industrial pipeline, gas and steam medium volume and mass rate.

But, when the industrial automation field uses vortex shedding flow meter to measure steam at present, because what vortex shedding flow meter itself recorded is volumetric flow rate, and steam often takes in mass in trade settlement, for volumetric flow rate is converted into quality, joins temperature transmitter outside needing usually and is installed on the corresponding pipeline as annex, again lead-in wire is received and carried out temperature compensation in the Displaying Meter, this structural manufacturing process complexity, construction trouble, wiring inconvenience.(referring to Fig. 1)

The utility model content

Technical problem to be solved in the utility model provides a kind of intellectuality, and the vortex shedding flow meter of the temperature compensation that integrated degree is high when using vortex shedding flow meter to measure steam, is joined temperature transmitter outside need not, and structural manufacturing process is simple.

The technical matters that the utility model solved can realize by the following technical solutions:

A kind of vortex shedding flow meter of temperature compensation, comprise housing, integrating meter and vortex generation body, vortex generation body is positioned at housing, connect by connecting link between housing and the integrating meter, be provided with flow sensor in the connecting link, one end of flow sensor is connected with integrating meter, in its flow probe access housing, after the vortex generation body, it is characterized in that: it also comprises a temperature transition device, and described temperature transition device is made of chip, current supply circuit, temperature sampling loop, amplification shaping loop, keyboard loop and LCD show circuit; Described flow probe is connected with described amplification shaping loop, connects a temp probe by a coupling head on the described temperature transition device, is connected with described temperature sampling loop, and the other end of temp probe inserts enclosure interior; Described current supply circuit, temperature sampling loop, amplification shaping loop, keyboard loop are connected with chip respectively with the LCD show circuit.

The vortex shedding flow meter of the utility model temperature compensation by the built-in flow rate calculation formula of the temperature transition device that installs additional and saturated-steam temperature-density meter, calculates mass rate and delivers among the LCD and show; By interior power supply power supply, do not join temperature transmitter outside not needing, do not need wiring, simple in structure, cost is low, and is easy to install.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.

Fig. 1 is the structural representation of existing vortex shedding flow meter.

Fig. 2 is the structural representation of the vortex shedding flow meter of the utility model temperature compensation.

Fig. 3 is the theory diagram of temperature transition device of the vortex shedding flow meter of the utility model temperature compensation.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

As shown in Figure 2, a kind of vortex shedding flow meter of temperature compensation, comprise housing 1, integrating meter 2 and vortex generation body 3, vortex generation body 3 is positioned at housing 1, connect by connecting link 4 between housing 1 and the integrating meter 2, be provided with flow sensor 5 in the connecting link 4, an end of flow sensor 5 is connected with integrating meter 2, in its flow probe 51 access housings 1, after the vortex generation body 3.

The vortex shedding flow meter of temperature compensation also comprises a temperature transition device 6, and described temperature transition device 6 is made of chip 61, current supply circuit 62, temperature sampling loop 63, amplification shaping loop 64, keyboard loop 65 and LCD show circuit 66; Described current supply circuit 62, temperature sampling loop 63, amplification shaping loop 64, keyboard loop 65 are connected with chip 61 respectively with LCD show circuit 66.(referring to Fig. 3)

Flow probe 51 is connected with described amplification shaping loop 64, the piezoelectric electro signal by amplify shaping loop 64 with the Weak pulse signal of flow probe 51 amplify, shaping sends into counting in the chip 61; Temperature transition device 6 connects a temp probe 7 by coupling head 67, is connected with described temperature sampling loop 63, and the other end of temp probe 7 inserts housing 1 inside; The resulting temperature signal of temp probe 7 is delivered in the chip 61 by temperature sampling loop 63 handles; Described current supply circuit 62 is a power supply with the battery, and chip 61 is powered, and guarantees the operate as normal of chip 61; Keyboard loop 65 is the software operation circuit, in order to the work of control chip 61; LCD show circuit 66 then is used for showing the result after into chip 61 processing.

During use, by flow probe 51 and temp probe 7 respectively with the piezoelectric electro signal and the temperature signal that collect, handle by amplification shaping loop 64 and temperature sampling loop 63 input chips 61, chip 61 calculates correct numerical value by built-in flow rate calculation formula and saturated-steam temperature-density meter, is shown by LCD show circuit 66.

In the utility model, described chip 61 is singlechip chip PIC16C73, temp probe 7 is the PT100 temp probe, current supply circuit 62 is common power-supplying circuit, temperature sampling loop 63 is common sample circuit, and amplifying shaping loop 64 is common amplification and rectification circuit, the software operation circuit that keyboard loop 65 is common, LCD show circuit 66 is common display circuit, just has not been described in detail at this.

More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1, a kind of vortex shedding flow meter of temperature compensation, comprise housing, integrating meter and vortex generation body, vortex generation body is positioned at housing, connect by connecting link between housing and the integrating meter, an end that is provided with flow sensor, flow sensor in the connecting link is connected with integrating meter, in the flow probe access housing of flow sensor, after the vortex generation body, it is characterized in that: it also comprises a temperature transition device, and described temperature transition device is made of chip, current supply circuit, temperature sampling loop, amplification shaping loop, keyboard loop and LCD show circuit; Described flow probe is connected with described amplification shaping loop, connects a temp probe by a coupling head on the described temperature transition device and is connected with described temperature sampling loop, and the other end of temp probe inserts enclosure interior; Described current supply circuit, temperature sampling loop, amplification shaping loop, keyboard loop are connected with chip respectively with the LCD show circuit.