CN104776890A - Two-point-temperature-averaged flowmeter - Google Patents
Two-point-temperature-averaged flowmeter Download PDFInfo
- Publication number
- CN104776890A CN104776890A CN201510181987.6A CN201510181987A CN104776890A CN 104776890 A CN104776890 A CN 104776890A CN 201510181987 A CN201510181987 A CN 201510181987A CN 104776890 A CN104776890 A CN 104776890A
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- Prior art keywords
- fluid
- temperature sensor
- pipe
- temperature
- heating tube
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- 239000012530 fluid Substances 0.000 claims abstract description 65
- 238000010438 heat treatment Methods 0.000 claims abstract description 41
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 238000012935 Averaging Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000013461 design Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000001163 endosome Anatomy 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
The invention provides a two-point-temperature-averaged flowmeter, belonging to the technical field of measuring instruments. The two-point-temperature-averaged flowmeter comprises a fluid inlet pipe, a fluid outlet pipe, a heating pipe, temperature sensors, a current measuring instrument, a power supply, a calculation controller, wiring harnesses and a heat insulation layer, wherein the two ends of the heating pipe are respectively connected with the fluid inlet pipe and the fluid outlet pipe, two temperature sensors are arranged in the fluid inlet pipe and are close to an inlet of the heating pipe, two temperature sensors are arranged in the fluid outlet pipe and are close to an outlet of the heating pipe, the external wall of the heating pipe is fully wrapped by the heat insulation layer, and the heating pipe, the temperature sensors, the current measuring instrument, the power supply and the calculation controller are connected with one another through the wiring harnesses. According to the two-point-temperature-averaged flowmeter, the mass of flow flowing through the heating pipe can be calculated according to the difference of temperature of fluid of the front and rear parts of the heating pipe and the current of the heating pipe; the two-point-temperature-averaged flowmeter is reasonable in design and simple in structure and is applicable to the precise measurement on fluid mass.
Description
Technical field
The invention belongs to surveying instrument equipment technical field, specifically, is a kind of 2 temperature-averaging type flowmeters that heat transfer theory can be utilized to carry out flow measurement.
Background technology
So-called flow, refers in the unit interval Fluid Volume flowing through closed conduct or open channel free area, also known as instantaneous delivery.Volumetric flow rate is called when Fluid Volume represents with volume; When Fluid Volume is called mass rate with during quality representation.Flow through the volume of the fluid of a certain segment pipe in unit interval, be called the volumetric flow rate of this xsect.When incompressible fluid makes Steady Flow, constant by the flow in each cross section of same flow pipe.Measurement is carried out to the flow of the fluid flowed in a routing and is referred to as flow metering.The fluid of flow measurement is diversified, as measuring object has gas, liquid, fluid-mixing; The temperature of fluid, pressure, flow all have larger difference, and the accuracy of measurement of requirement is also different.Therefore, the task of flow measurement is exactly that the measuring condition such as kind, flow state, measurement place of detected fluid, studies various corresponding measuring method according to measurement object, and the correct transmission of guaranteed flow value.Flowmeter, national scientific and technical terminology validation board is defined as it: instruction measured flux is in the instrument of selected time interval inner fluid total amount.Be exactly a kind of instrument for fluid flow in measuring channel or open channel in simple terms, conventional unit m3/h in engineering, it can be divided into instantaneous delivery and integrated flow, instantaneous delivery and the unit interval interior amount crossing closed conduct or open channel free area, the material flow through can be gas, liquid, solid; Integrated flow is the cumulative amount flowing through closed conduct or open channel free area at a certain section of time interval endosome.Also integrated flow can be tried to achieve to time integral, so also can mutually transform between instantaneous flowmeter and flow quantity recorder by instantaneous delivery.Flowmeter is divided into again differential pressure flowmeter, spinner-type flowmeter, restriction flowmeter, slit flowmeter, volume-displacement, electromagnetic flowmeter, ultrasonic flow meter etc.
In existing flowmeter, differential pressure flowmeter, restriction flowmeter price comparison are cheap, but measuring accuracy is not high; Electromagnetic flowmeter, ultrasonic flow rate measurement accuracy of measurement are high, but price is very expensive again.Exploitation low price, the flowmeter that measuring accuracy is high is the trend of flowmeter development.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of 2 temperature-averaging type flowmeters, on low-cost basis, higher measuring accuracy can be had.
The present invention is achieved through the following technical solutions, the present invention includes fluid and enter pipe, fluid effuser, heating tube, first temperature sensor, second temperature sensor, current measuring instrument, power supply, computing controller, wire harness, heat-insulation layer, three-temperature sensor, 4th temperature sensor, fluid enters pipe and is connected with existing fluid source, the two ends of heating tube enter pipe with fluid respectively, fluid effuser is connected, first temperature sensor, three-temperature sensor is arranged in the import that fluid enters also close heating tube in pipe, second temperature sensor, 4th temperature sensor is arranged in the outlet also near heating tube in fluid effuser, the outer wall of heating tube is all wrapped up by heat-insulation layer, fluid enters pipe, the outer wall of fluid effuser is wrapped up by heat-insulation layer, heating tube, first temperature sensor, second temperature sensor, current measuring instrument, power supply, computing controller, three-temperature sensor, be connected by wire harness between 4th temperature sensor.
Further, fluid enters pipe in the present invention, fluid effuser, heating tube be uniform cross section pipe, fluid enter pipe, fluid effuser, heating tube internal diameter identical.
The invention has the beneficial effects as follows: the present invention is reasonable in design, structure is simple; Heat transfer theory that can be basic, just can realize high-precision flow measurement.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of A-A section in Fig. 1;
Label in accompanying drawing is respectively: 1, fluid enters pipe, 2, fluid effuser, 3, heating tube, the 4, first temperature sensor, 5, the second temperature sensor, 6, current measuring instrument, 7, power supply, 8, computing controller, 9, wire harness, 10, heat-insulation layer, 11, three-temperature sensor, the 12, the 4th temperature sensor.
Embodiment
Elaborate to embodiments of the invention below in conjunction with accompanying drawing, the present embodiment, premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
embodiment
Embodiments of the invention as depicted in figs. 1 and 2, the present invention includes fluid and enter pipe 1, fluid effuser 2, heating tube 3, first temperature sensor 4, second temperature sensor 5, current measuring instrument 6, power supply 7, computing controller 8, wire harness 9, heat-insulation layer 10, three-temperature sensor 11, 4th temperature sensor 12, fluid enters pipe 1 and is connected with existing fluid source, and the two ends of heating tube 3 enter pipe 1 with fluid respectively, fluid effuser 2 is connected, the first temperature sensor 4, three-temperature sensor 11 is arranged in the import that fluid enters also close heating tube 3 in pipe 1, the second temperature sensor 5, 4th temperature sensor 12 is arranged in the outlet also near heating tube 3 in fluid effuser 2, and the outer wall of heating tube 3 is all wrapped up by heat-insulation layer 10, and fluid enters pipe 1, the outer wall of fluid effuser 2 is wrapped up by heat-insulation layer 10, the first temperature sensor 4, second temperature sensor 5, current measuring instrument 6, power supply 7, computing controller 8, three-temperature sensor 11, be connected by wire harness 9 between 4th temperature sensor 12, fluid enters pipe 1, fluid effuser 2, heating tube 3 are uniform cross section pipe, fluid enter pipe 1, fluid effuser 2, heating tube 3 internal diameter identical.
In implementation process of the present invention, basic heat transfer principle Q=C*M* Δ T is used.Flow through heating tube 3 fluid add heat Q by heating tube 3 resistance known and current measuring instrument 6 survey galvanometer and calculate, C is determined by the characteristic of known fluid, Δ T is recorded by the temperature sensor before and after heating tube 3, just can be calculated in the unit interval circulation quality flowing through heating tube 3 like this by computing controller 8.The outer wall parcel heat-insulation layer 10 of heating tube 3, can reduce heating tube 3 and outwards conduct heat, improve measuring accuracy.Heating tube 3 temperature in gets the mean value of the first temperature sensor 4, three-temperature sensor 11 measured temperature, and heating tube 3 outlet temperature gets the second temperature sensor 5, the 4th temperature sensor 12 measured temperature draw value.
Claims (2)
1. 2 temperature-averaging type flowmeters, comprise fluid and enter pipe (1), fluid effuser (2), fluid enters pipe (1) and is connected with existing fluid source, it is characterized in that, also comprises heating tube (3), first temperature sensor (4), second temperature sensor (5), current measuring instrument (6), power supply (7), computing controller (8), wire harness (9), heat-insulation layer (10), three-temperature sensor (11), 4th temperature sensor (12), the two ends of heating tube (3) enter with fluid respectively manages (1), fluid effuser (2) is connected, the first temperature sensor (4), three-temperature sensor (11) is arranged in the import that fluid enters also close heating tube (3) in pipe (1), the second temperature sensor (5), 4th temperature sensor (12) is arranged in the outlet also near heating tube (3) in fluid effuser (2), the outer wall of heating tube (3) is all wrapped up by heat-insulation layer (10), and fluid enters pipe (1), the outer wall of fluid effuser (2) is wrapped up by heat-insulation layer (10), heating tube (3), first temperature sensor (4), second temperature sensor (5), current measuring instrument (6), power supply (7), computing controller (8), three-temperature sensor (11), be connected by wire harness (9) between 4th temperature sensor (12).
2. 2 temperature-averaging type flowmeters according to claim 1, it is characterized in that fluid enters pipe (1), fluid effuser (2), heating tube (3) are uniform cross section pipe, fluid enter pipe (1), fluid effuser (2), heating tube (3) internal diameter identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510181987.6A CN104776890A (en) | 2015-04-16 | 2015-04-16 | Two-point-temperature-averaged flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510181987.6A CN104776890A (en) | 2015-04-16 | 2015-04-16 | Two-point-temperature-averaged flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104776890A true CN104776890A (en) | 2015-07-15 |
Family
ID=53618500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510181987.6A Pending CN104776890A (en) | 2015-04-16 | 2015-04-16 | Two-point-temperature-averaged flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104776890A (en) |
-
2015
- 2015-04-16 CN CN201510181987.6A patent/CN104776890A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150715 |
|
| WD01 | Invention patent application deemed withdrawn after publication |