CN104776889A - Temperature difference type flow measurement system - Google Patents
Temperature difference type flow measurement system Download PDFInfo
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- CN104776889A CN104776889A CN201510181954.1A CN201510181954A CN104776889A CN 104776889 A CN104776889 A CN 104776889A CN 201510181954 A CN201510181954 A CN 201510181954A CN 104776889 A CN104776889 A CN 104776889A
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- fluid
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- heating tube
- temperature sensor
- heating pipe
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Abstract
The invention discloses a temperature difference type flow measurement system, and belongs to the technical field of measurement instruments. The system comprises a fluid inlet pipe, a fluid outflow pipe, a heating pipe, temperature sensors, a current measurer, a power supply, a calculation controller, a wire harness and a heat-preservation layer, wherein the two ends of the heating pipe are connected with the fluid inlet pipe and the fluid outflow pipe respectively; the first temperature sensor is arranged in the fluid inlet pipe, and is close to an inlet of the heating pipe; the second temperature sensor is arranged in the fluid outflow pipe, and is close to an outlet of the heating pipe; the outer wall of the heating pipe is completely wrapped with the heat-preservation layer; the heating pipe, the temperature sensors, the current measurer, the power supply and the calculation controller are connected through the wire harness. According to the system, circulating mass flowing through the heating pipe can be calculated according to the temperature difference of fluid on the front and rear parts of the heating pipe and the current of the heating pipe; the system is reasonable in design, simple in structure and applicable to the accurate measurement of fluid mass.
Description
Technical field
The invention belongs to surveying instrument equipment technical field, specifically, is a kind of thermal type Flow Measuring System 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 thermal type Flow Measuring System, 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, 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 is arranged in the import that fluid enters also close heating tube in pipe, second 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, be connected by wire harness between computing controller.
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, and 2, fluid effuser, 3, heating tube, the 4, first temperature sensor, the 5, second temperature sensor, 6, current measuring instrument, 7, power supply, 8, computing controller, 9, wire harness, 10, heat-insulation layer.
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, fluid enters pipe 1 and is connected with existing fluid source, the two ends of heating tube 3 enter pipe 1 with fluid respectively, fluid effuser 2 is connected, first temperature sensor 4 is arranged in the import that fluid enters also close heating tube 3 in pipe 1, second temperature sensor 5 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, 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, be connected by wire harness 9 between computing controller 8, 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.
Claims (2)
1. a thermal type Flow Measuring System, comprises fluid and enters 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), the two ends of heating tube (3) enter with fluid respectively manages (1), fluid effuser (2) is connected, first temperature sensor (4) is arranged in the import that fluid enters also close heating tube (3) in pipe (1), second temperature sensor (5) 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), be connected by wire harness (9) between computing controller (8).
2. thermal type Flow Measuring System 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 |
|---|---|---|---|
| CN201510181954.1A CN104776889A (en) | 2015-04-16 | 2015-04-16 | Temperature difference type flow measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510181954.1A CN104776889A (en) | 2015-04-16 | 2015-04-16 | Temperature difference type flow measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104776889A true CN104776889A (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510181954.1A Pending CN104776889A (en) | 2015-04-16 | 2015-04-16 | Temperature difference type flow measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104776889A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606171A (en) * | 2016-01-06 | 2016-05-25 | 朱小菊 | Hot water flowmeter |
| CN108180341A (en) * | 2018-01-23 | 2018-06-19 | 西安锐步石油科技有限公司 | Intelligent numerical control pipeline oil heater |
-
2015
- 2015-04-16 CN CN201510181954.1A patent/CN104776889A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606171A (en) * | 2016-01-06 | 2016-05-25 | 朱小菊 | Hot water flowmeter |
| CN108180341A (en) * | 2018-01-23 | 2018-06-19 | 西安锐步石油科技有限公司 | Intelligent numerical control pipeline oil heater |
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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 |
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| WD01 | Invention patent application deemed withdrawn after publication |