CN2478078Y - Vortex street flow sensor having function of measuring temp - Google Patents
Vortex street flow sensor having function of measuring temp Download PDFInfo
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- CN2478078Y CN2478078Y CN 01239078 CN01239078U CN2478078Y CN 2478078 Y CN2478078 Y CN 2478078Y CN 01239078 CN01239078 CN 01239078 CN 01239078 U CN01239078 U CN 01239078U CN 2478078 Y CN2478078 Y CN 2478078Y
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Abstract
The utility model relates to a vortex street flow sensor with temperature measurement function, including a main body of flow sensor, an eddy generator, an eddy signal detection component and a peripheral circuit; the eddy signal detection component is fixed on the pipe wall of main body of flow sensor, and an eddy generator is inserted in the flow inlet position; the vortex street flow sensor is connected with the pipe of fluid to be checked via a flanged connection; the utility model is characterized in that the vortex street flow sensor also includes a platinum resistance temperature element, and the platinum resistance temperature element is installed on the inner wall of main body of flow sensor. The utility model is featured by small volume and convenient installation.
Description
The utility model belongs to the measurement instrument field, relates in particular to, a kind of vortex flow sensors with temp sensing function.
As everyone knows, steam-heating apparatus is equipped with steam flowmeter in the equipment entrance position usually.Though steam flowmeter is based on different principle, under any speed, every kind of principle all makes the quantity of steam that is consumed be controlled, and the right quantity steam that is used in material to be heated simultaneously can be supplied with this equipment.Vortex shedding flow meter (having another name called swirl flowmeter) is applicable to the multiple measurement that comprises medium fluid such as liquid, gas and steam, and the major part in this instrument is used for measuring the flow of saturated vapour.From this product in the present user mode of China, what most medium-sized and small enterprises adopted is saturated vapour (few part adopts superheated vapor), the vortex shedding flow meter of this employing saturated vapour, during use along with the type of boiler, the variation of steam consumption, the variation of pressure, temperature, density is also very big, so under the general condition, do not reach the effect of measuring rate of flow of fluid or flow.When vapor pressure changes 0.1MPa (1kgf/cm
2) time, density will change about 10%, and this changing value is actually sizable, so, must revise the flow value that records according to actual pressure.
At present the vortex flow sensors that uses has by pressure and detects, and what this sensor used is pressure transducer, and cost is higher, and volume is big, and pressure measurement separates with measurement of discharge and brings the inconvenience of installing and using; Also have to adopt by temperature and detect, because the thermal inertia of temperature, time constant can be bigger, and reaction velocity is very slow.Also do not appear at the technology of synthetic thermometric, pressure measurement function on the vortex flow sensors in the actual production, all need user's other setting pressure transmitter on jet chimney, so not only bring the inconvenience in the use, and increased use cost.
The purpose of this utility model provides a kind of vortex flow sensors with temp sensing function, on original sensor, install the platinum resistor temperature measuring element additional, when steam flow is provided, the temperature of saturated vapour is provided simultaneously, so that by amplifying circuit in the flowmeter and digital circuit the density of steam is revised, is reached the purpose of accurate metering.Also have little and cheap, the easy for installation characteristics of volume.
The utility model is to realize like this, a kind of vortex flow sensors with temp sensing function, comprise the flow sensor body, eddy generator, the whirlpool signal detection component, described whirlpool signal detection component is fixed on the flow sensor body inwall, in the fluid intake position of described vortex flow sensors an eddy generator is set, described vortex flow sensors connects by a flange and links to each other with fluid line to be detected, it is characterized in that, also comprise the platinum resistor temperature measuring element in the described vortex flow sensors, described platinum resistor temperature measuring element is fixedly mounted on the inwall of flow sensor body.
Below, with reference to accompanying drawing, for those skilled in the art that, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.
Fig. 1 provides the floor map of the utility model vortex flow sensors body;
Fig. 2 provides the sectional view of sensor body among Fig. 1;
Fig. 3 provides relation curve between the resistance of temperature and platinum resistance;
Fig. 4 provides the synoptic diagram that the platinum resistance that adopts in the preferred embodiment in the utility model sensor realizes further thermometric.
In conjunction with Fig. 1 and Fig. 2, the body 1 of vortex flow sensors is a pipeline configuration, there is a flange to connect 2 in the sensor entry position, connecting 2 pipelines with this sensor and detected fluid by flange joins, also be provided with an eddy generator 3 in the entry position, usually this eddy generator 3 is the triangle column, platinum resistor temperature measuring element 4 can place each position of body 1, usually can as whirlpool signal detection component 7, be fixed on the inwall of body 1, platinum resistance 4 is connected with peripheral circuit in the flowmeter by signal wire 6.
Please, be depicted as and adopt the utility model flow sensor to carry out an embodiment of the conversion circuit of follow-up flow detection referring to Fig. 4.As shown in the figure, platinum resistance Pt100 and three resistance R 1, R2, R3 constitute an electric bridge 40 structures, series arm with resistance R 2 and R3 after resistance R 1 is connected with platinum resistance R4 is in parallel, the first input end of amplifying circuit 41 connects the tie point of resistance R 1 and platinum resistance R4, second input end of amplifying circuit 41 connects the tie point of resistance R 2 and resistance R 3, and the output terminal of amplifying circuit 41 links to each other with microcomputer digital display secondary instrument 42.Amplifying circuit 41 can adopt the conventional amplifier that comprises triode.Diagram provides in the microcomputer digital display secondary instrument one 0804 A/D converter.
Microcomputer digital display secondary instrument concerns one to one that according to the pressure and temperature of steam in the saturated vapour environment saturated-steam temperature that will be reflected on the platinum resistance 4 by conversion circuit changes the variation that is converted into corresponding vapor pressure.According to the relation between platinum resistance and the pressure, when vapor pressure was 0～2.0MPa, the resistance variations of corresponding platinum resistance Pt100 was 138.5～181.3 Ω, bridge circuit output is about 0～100mV, R1=R2, the resistance of R3 is taken as the resistance when vapor pressure is 0, i.e. 138.5 Ω as platinum resistance Pt.When the pressure of vapor stream by pipeline equated with atmosphere, four brachium pontis of the electric bridge of conversion circuit balanced each other, and do not have electric current to enter amplifying circuit; Along with the vapor pressure that flows through vortex flow sensors changes, cause temperature variation, cause the change of resistance on the platinum resistance 4, broken the bridge balance of conversion circuit, to there be electric current to enter amplifying circuit, after amplifying, make the work of microcomputer digital display secondary instrument, show the pressure of current steam.According to actual needs, several platinum resistor temperature measuring elements can be set in each position at the flow sensor body.
Fig. 3 has provided two curve maps.Curve A is the graph of relation of saturated vapour pressure and temperature in vortex flow sensors, the vapor (steam) temperature that different vapor pressures are corresponding different.Curve B is the graph of relation between temperature and the platinum resistance resistance, under saturated-vapor state, is to concern one to one between platinum resistance resistance and temperature, the pressure as seen.The flow that vortex flow sensors records is a volumetric flow rate, can be converted into mass rate by being multiplied by vapour density.Because the density of saturated vapour and pressure, temperature also are one-to-one relationships, thus just can learn density by gaging pressure or temperature, thus volumetric flow rate is converted into mass rate.
More than all embodiment only for the explanation the utility model usefulness, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technical schemes that are equal to also should belong to category of the present utility model and should be limited by each claim.
Claims (1)
1, a kind of vortex flow sensors with temp sensing function, comprise the flow sensor body, eddy generator, the whirlpool signal detection component, described whirlpool signal detection component is fixed on the flow sensor body inwall, in the fluid intake position of described vortex flow sensors an eddy generator is set, described vortex flow sensors connects by a flange and links to each other with fluid line to be detected, it is characterized in that, also comprise the platinum resistor temperature measuring element in the described vortex flow sensors, described platinum resistor temperature measuring element is fixedly mounted on the inwall of flow sensor body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239078 CN2478078Y (en) | 2001-04-27 | 2001-04-27 | Vortex street flow sensor having function of measuring temp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01239078 CN2478078Y (en) | 2001-04-27 | 2001-04-27 | Vortex street flow sensor having function of measuring temp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2478078Y true CN2478078Y (en) | 2002-02-20 |
Family
ID=33651590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01239078 Expired - Fee Related CN2478078Y (en) | 2001-04-27 | 2001-04-27 | Vortex street flow sensor having function of measuring temp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2478078Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579264A (en) * | 2020-05-22 | 2020-08-25 | 浙江银轮机械股份有限公司 | Temperature measurement method and temperature measurement tool |
-
2001
- 2001-04-27 CN CN 01239078 patent/CN2478078Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579264A (en) * | 2020-05-22 | 2020-08-25 | 浙江银轮机械股份有限公司 | Temperature measurement method and temperature measurement tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |