CN202403747U - Small-scale multi-functional air flow measuring device - Google Patents
Small-scale multi-functional air flow measuring device Download PDFInfo
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- CN202403747U CN202403747U CN2011205613259U CN201120561325U CN202403747U CN 202403747 U CN202403747 U CN 202403747U CN 2011205613259 U CN2011205613259 U CN 2011205613259U CN 201120561325 U CN201120561325 U CN 201120561325U CN 202403747 U CN202403747 U CN 202403747U
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Abstract
A small-scale multi-functional air flow measuring device belongs to the technical field of air flow measuring equipment. A sampling air duct, a speed measuring duct and a temperature measuring tube are sequentially connected with one another and are transparent glass tubes; one side of the sampling tube is provided with an air inlet plate, and air inlet holes are arranged on the side surface of the sampling tube and the air inlet plate; the sampling air duct and the speed measuring duct are connected in a flange mode, the speed measuring duct and the temperature measuring tube are connected in a flange mode, and connection portions among the sampling air duct, the speed measuring duct and the temperature measuring tube are provided with honeycomb hole plates; speed measuring holes are arranged on the speed measuring duct; and temperature measuring holes are arranged on the temperature measuring duct. The small-scale multi-functional air flow measuring device is small in occupied space, multi-functional, convenient for experimental observation, applicable to teaching and high in operability, and can be used for demonstrating in teaching and is closely linked with engineering practices.
Description
Technical field
The novel experimental provision that relates to of this experiment, a kind of small-size multifunction apparatus for measuring air quantity that is applied in the teaching and scientific research of saying so more specifically belongs to the air measuring apparatus field.
Background technology
Air quantity is an important parameter of estimating air channel operation conditions and performance in the pipeline.And wet and dry bulb temperature, pressure and rotating speed etc. all are parameters commonly used in thermal technology, HVAC engineering and the research in the pipeline; They are measured; And study its mutual relationship; Purpose is that the flow velocity of architecture indoor air, temperature, humidity etc. are effectively regulated, to improve the indoor air quality.
Mostly existing apparatus for measuring air quantity is metal material, and the pipeline floor area is bigger, in education activities, explains the air measuring principle theoretically, and the student is difficult to have understanding clearly.And the building in the operation can not provide the chance of visiting practice for the student, is difficult to carry out any type of test demonstration.Therefore, in teaching and experiment, how intuitively to carry out the wind quantity test explanation and have certain difficulty.
Three, summary of the invention:
The utility model is for avoiding the existing in prior technology weak point, provide in a kind of application building ventilation teaching or the experiment, not only being applicable to teaching but also can get in touch the actual small-size multifunction apparatus for measuring air quantity of engineering.
The technical scheme that the utility model technical solution problem is adopted is:
Sampling airduct 1, pitot tube 5, temperature tube 8 are linked in sequence; The material of said sampling airduct 1, pitot tube 5, temperature tube 8 is all selected transparent glass tube for use; One side of said sampling airduct 1 is provided with air intake plate 3; On sampling airduct 1 side and air intake plate 3, be furnished with fresh air inlet 2; And between sampling airduct 1 and pitot tube 5; Adopt flange to be connected between pitot tube 5 and the temperature tube 8, sample between airduct 1 and the pitot tube 5, the joint portion between pitot tube 5 and the temperature tube 8 all is provided with cellular orifice plate 4; Said pitot tube 5 is provided with and just inserts the difference instrument hole 7 of testing the speed of testing the speed, like Pitot tube or hot-bulb electricity anemoscope; Be provided with on the said temperature tube 8 and be convenient to insert the thermometer hole 9 that dry-bulb temperature is taken into account wet bulb thermometer.
The layout of fresh air inlet 2 on sampling airduct 1 and air intake plate 3 is uniform.
Compared with present technology, the beneficial effect of the utility model is embodied in:
1, the utility model has operability simultaneously not only as teaching demonstration, can effectively promote the understanding of experimenter to the mutual relationship that relates to parameter in the pipeline.
2, the transparent plexi-glass tubular of material selection of the utility model sampling airduct is convenient to experimental observation, and intuitive is better; The sampling airduct is provided with even orifice plate, between pipeline section and the thermometric pipeline section cellular orifice plate is set all testing the speed, and adopts flange to connect, and makes air current flow be tending towards evenly being convenient to measurement.
3, the utility model remove be provided with the pipeline section that tests the speed can the measuring channel air quantity; Be provided with also that the thermometric pipeline section can measuring channel do, wet-bulb temperature; Thereby can measure the relative humidity in the pipeline, and measuring wind speed is generally only carried out in the measurement of on-the-spot air channel, air parameter is just simply read the outside atmosphere parameter; A lot of situation air quantity parameters and outdoor weather condition and inconsistent, so the air quantity result is accurate inadequately.And this experimental provision is directly read the dry-bulb temperature and the wet-bulb temperature of the air-flow of flowing through, and calculates density, according to the on-the-spot atmospheric pressure of experiment, can accurately calculate atmospheric density, thereby can accurately measure air quantity.
Description of drawings:
Fig. 1 is the experiment table installation drawing of the utility model.
Fig. 2 is the utility model wind inlet section front air intake plate synoptic diagram
Fig. 3 meets the airflow direction synoptic diagram for the utility model sampling airduct and pitot tube junction.
Among the figure: 1, sampling airduct, 2, fresh air inlet, 3, air intake plate, 4, cellular orifice plate; 5, pitot tube, 6, Pitot tube, 7, the hole of testing the speed, 8, temperature tube; 9, thermometer hole, 10, dry bulb thermometer, 11, the wet bulb mercury thermometer, 12, blower fan; 13, support, 14, even honeycomb hole, 15, flange.
Embodiment:
Do further explanation below in conjunction with accompanying drawing and embodiment for the utility model:
As shown in Figure 1, sampling airduct 1, pitot tube 5, temperature tube 8 are linked in sequence; The material of said sampling airduct 1, pitot tube 5, temperature tube 8 is all selected transparent glass tube for use; One side of said sampling airduct 1 is provided with air intake plate 3; On sampling airduct 1 side and air intake plate 3, be furnished with fresh air inlet 2; And between sampling airduct 1 and pitot tube 5; Adopt flange to be connected between pitot tube 5 and the temperature tube 8, sample between airduct 1 and the pitot tube 5, the joint portion between pitot tube 5 and the temperature tube 8 all is provided with cellular orifice plate 4; Said pitot tube 5 is provided with and just inserts the difference instrument hole 7 of testing the speed of testing the speed, like Pitot tube or hot-bulb electricity anemoscope; Be provided with on the said temperature tube 8 and be convenient to insert the thermometer hole 9 that dry-bulb temperature is taken into account wet bulb thermometer.
Uniform during the layout of fresh air inlet 2 on sampling airduct 1 and air intake plate 3.
Concrete measuring process is following:
1, air measuring process: on support 13, connect blower fan 12, temperature tube 8, pitot tube 5 and sampling airduct 1 like Fig. 1; Take to wait the ring area-method to measure the caliber of airduct with vernier caliper or Steel Ruler; Open blower fan 12, then get in the airduct through even honeycomb hole 14 (see figure 4)s on the honeycomb structure plate 4 after fresh air inlet 2 (see figure 3)s of side air inlet hole 2 (see figure 2)s and the positive air intake plate 3 of air through sampling airduct 1; Like Fig. 5 Pitot tube 6 is inserted in the hole 7 of testing the speed.With inclined-tube manometer and Pitot tube 6 pair cross-section wind speed point-to-point measurements.Wind speed and diameter through measuring can calculate the airduct air quantity.
2, relative humidity measurement process in the pipeline: connect experimental apparatus like Fig. 1; Insert mercury thermometer (dry bulb) 10, mercury thermometer (wet bulb) 11 in the thermometer hole 9 like Fig. 6, when putting into airduct, should the mercury thermometer thermometer bulb be placed on the center of airduct; Inject distilled water in the water bowl under mercury thermometer (wet bulb) 11; Start blower fan 12; Hot-bulb electricity anemoscope is inserted airduct, adjustment aperture valve, to wind speed be 2m/s, take out the anemoscope gauge head.After treating that mercury thermometer (dry bulb) 10, mercury thermometer (wet bulb) 11 are read value stabilization, reading can calculate the relative humidity in the air channel through dry-bulb temperature and the wet-bulb temperature of measuring respectively.This device can also be studied the influence factor of relative humidity, and is main through changing the variation of wind speed research wet-bulb temperature.
Claims (2)
1. small-size multifunction apparatus for measuring air quantity, it includes sampling airduct (1), pitot tube (5), temperature tube (8); It is characterized in that: sampling airduct (1), pitot tube (5), temperature tube (8) are linked in sequence; The material of said sampling airduct (1), pitot tube (5), temperature tube (8) is all selected transparent glass tube for use; One side of said sampling airduct (1) is provided with air intake plate (3); On sampling airduct (1) side and air intake plate (3), be furnished with fresh air inlet (2); And between sampling airduct (1) and pitot tube (5); Be connected through flange between pitot tube (5) and the temperature tube (8), between sampling airduct (1) and the pitot tube (5), the joint portion between pitot tube (5) and the temperature tube (8) all is provided with cellular orifice plate (4); Said pitot tube (5) is provided with and just inserts the difference instrument hole (7) of testing the speed of testing the speed; Said temperature tube (8) go up to be provided with to be convenient to insert dry-bulb temperature and to take into account the thermometer hole of wet bulb thermometer (9).
2. small-size multifunction apparatus for measuring air quantity according to claim 1 is characterized in that: the layout of fresh air inlet (2) on sampling airduct (1) and air intake plate (3) is uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205613259U CN202403747U (en) | 2011-12-29 | 2011-12-29 | Small-scale multi-functional air flow measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205613259U CN202403747U (en) | 2011-12-29 | 2011-12-29 | Small-scale multi-functional air flow measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202403747U true CN202403747U (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205613259U Expired - Fee Related CN202403747U (en) | 2011-12-29 | 2011-12-29 | Small-scale multi-functional air flow measuring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202403747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973503A (en) * | 2016-07-11 | 2016-09-28 | 同济大学 | Composite sampling tube for acquiring gas and measuring temperature for microwave heating device |
-
2011
- 2011-12-29 CN CN2011205613259U patent/CN202403747U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973503A (en) * | 2016-07-11 | 2016-09-28 | 同济大学 | Composite sampling tube for acquiring gas and measuring temperature for microwave heating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20121229 |