CN201319029Y - Flow resistance instrument adopting water tank method - Google Patents
Flow resistance instrument adopting water tank method Download PDFInfo
- Publication number
- CN201319029Y CN201319029Y CNU2008201400213U CN200820140021U CN201319029Y CN 201319029 Y CN201319029 Y CN 201319029Y CN U2008201400213 U CNU2008201400213 U CN U2008201400213U CN 200820140021 U CN200820140021 U CN 200820140021U CN 201319029 Y CN201319029 Y CN 201319029Y
- Authority
- CN
- China
- Prior art keywords
- water tank
- flow resistance
- test specimen
- resistance instrument
- casket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model provides a flow resistance instrument adopting a water tank method, which is formed through sealing a sealing water tank, a micromanometer, a test piece box, a measuring tube, a stop-watch or a chronograph, and a water source which are connected, and is used for measuring and controlling the flow resistance of a sound absorption material; and the flow resistance is an indispensable and important factor for judging the sound absorption effect of a material. The system thereof has the advantages of stable pressure, simple and easy application and economic performance, is suitable for developing and producing a sound absorption material, compensates for the defect that the flow resistance valve of the sound absorption material is not detected in our country, and improves the sound absorption performance of the material through reasonably adjusting the volume weight and the thickness of the material.
Description
Technical field
The utility model water tank method flow resistance instrument belongs to acoustic measuring instrument, material acoustically effective authenticate technology field.
Background technology
The manufacturer of the acoustic absorbant that present China is all, the flow resistance of only knowing acoustic absorbant is the important parameter of decision acoustical absorption coefficient, but can't measure, the Reverberation room method of chamber and the detection of standing-wave-tube method by experiment of the acoustical absorption coefficient of material, lose time like this and fund, acoustic absorbant does not have lasting stability yet, can not rationally improve the sound absorbing capabilities of material, in developed country, flow resistance is the quality index of acoustic absorbant product, promptly there is the flow resistance of product to stipulate (JIS6306) as Japanese Industrial Standards (JIS), in order to stablizing of control properties of product.Rational Application flow resistance instrument has significance to the standardization in China present acoustic absorbant market.
Summary of the invention
Lack of standardization for solving present acoustic absorbant, can't detect the deficiency of the flow resistance of acoustic absorbant, the utility model provides a kind of water tank method flow resistance instrument, it can reflect outside the important parameter of situation of material structure, in the practical application of acoustic engineering, can be by certain simplified condition, obtaining good actual effect aspect the control material sound absorbing capabilities, for example, according to the thickness of porosint, can determine reasonable flow resistance value corresponding to this thickness, thereby find out the reasonable unit weight of material, can simplify R﹠D work greatly like this, the sound absorption frequency spectrum of material also can be controlled by the flow resistance of adjusting material, improves the sound absorbing capabilities of material.
The purpose of this utility model is the flow resistance of control acoustic absorbant, is convenient to rationally utilize acoustic absorbant.Flow resistance is that air particle passes through the resistance in the material gap.In stable stream condition, the ratio of the pressure differential on material two sides (Δ P) and flow line speed (U) by material is defined as the flow resistance (R) of material, and unit is a Rayleigh.
The utility model is by the following technical solutions:
A kind of water tank method of the utility model flow resistance instrument, form by sealing radiator, micromanometer, test specimen casket, graduated cylinder, stopwatch or stopwatch, water source six parts, its syndeton is: sealing radiator bottom air catheter pressure connects test specimen casket one side with flexible pipe, test specimen casket opposite side connects micromanometer with flexible pipe, there is sealed valve at sealing radiator bottom Shang Shui, the following mouth of a river, last water connects the water source, descends water to connect graduated cylinder, stopwatch or stopwatch with flexible pipe with flexible pipe, and each connecting portion seals.
When the water in the water tank is discharged by switch, the water tank inner air pressure changes, read the variation size by test specimen casket, micromanometer, the acoustic absorbant test specimen in the test specimen casket by the air pressure in atmospheric pressure and the water tank, produce and the steady air flow by test specimen, measure the water yield that t discharged in second, according to this system, its acoustic absorbant test specimen flow resistance value can be calculated.Water tank method flow resistance instrument pressure stability, simple, economical and practical.
Description of drawings:
Fig. 1 is the structural representation of the utility model water tank method flow resistance instrument.
In Fig. 1: 1 sealing radiator, 2 micromanometers, 3 test specimen caskets, 4 graduated cylinders, 5 stopwatch or stopwatch, 6 water sources.
Fig. 2 is the water tank structural map of the utility model water tank method flow resistance instrument.
Fig. 3 is the test specimen casket structural map of the utility model water tank method flow resistance instrument.
Fig. 4 is the micromanometer structural representation of the utility model water tank method flow resistance instrument
Embodiment:
The utility model connects the back sealing by sealing radiator, micromanometer, test specimen casket, graduated cylinder, stopwatch or stopwatch, water source six parts and forms by the following technical solutions.
Sealing radiator inner chamber cumulative volume 0.5-1 rice
3, cumulative volume thickness is at 0.3-0.5 rice, and is long at 1.5-2.5 rice, wide at 1-1.5 rice.The water tank inner top has the air pressure conduit outside the water tank of bottom, in order to connect test specimen casket one side, connect micromanometer by examination casket opposite side again, air pressure variations in the water tank is passed to test specimen casket, micromanometer, the bottom is the mouth of a river up and down, connects Shang Shui, following water-stop valve, and control is water up and down, side level scale table is observed height of water level.Sealing radiator, test specimen casket are to be made by fiberglass, stainless steel, plank, general steel plate iron plate, hard plastic board or aluminium sheet material.It is 0-5000Pa that micromanometer adopts measurement range, and minimum division value is 0.01-0.05mm, precision be ± and the micromanometer of 1-1.5Pa, the variation of micromanometer reading is trickle, can add microscope, the accuracy of being convenient to measure.The test specimen breathing area of test specimen casket is 2000-5000mm
2Its capacity of graduated cylinder is at 200-400CC, diameter 80-120mm, or adopt the precision spinner-type flowmeter, in order to measure the water yield that t discharged in second, the osculum greater than the water inlet pipe diameter is arranged at the bottom, smoothness when being convenient to discharge water.
Claims (6)
1, a kind of water tank method flow resistance instrument, it is characterized in that forming by sealing radiator (1), micromanometer (2), test specimen casket (3), graduated cylinder (4), stopwatch or stopwatch (5), water source (6) six parts, its syndeton is: sealing radiator (1) bottom air catheter pressure connects test specimen casket (3) one sides with flexible pipe, test specimen casket (3) opposite side connects micromanometer (2) with flexible pipe, there is sealed valve at sealing radiator (1) bottom Shang Shui, the following mouth of a river, last water connects water source (6), descends water to connect graduated cylinder (4), stopwatch or stopwatch (5) with flexible pipe with flexible pipe, and each connecting portion seals.
2, water tank method flow resistance instrument according to claim 1 is characterized in that: its structure of described sealing radiator (1) is water tank cavity cumulative volume 0.5-1 rice
3, cumulative volume thickness is at 0.3-0.5 rice, and it is long that wide at 1-1.5 rice, the water tank inner top has the air pressure conduit outside the water tank of bottom at 1.5-2.5 rice, and the bottom is the mouth of a river up and down, and Shang Shui, the following mouth of a river connect sealed valve, side level scale table.
3, water tank method flow resistance instrument according to claim 1 is characterized in that: described sealing radiator (1) test specimen casket (3) is to be made by fiberglass, stainless steel, plank, steel plate iron plate, hard plastic board or aluminium sheet material.
4, water tank method flow resistance instrument according to claim 1 is characterized in that: it is 0-5000Pa that described micromanometer (2) adopts measurement range, and minimum division value is 0.01-0.05mm, precision is ± and the micromanometer of 1-1.5Pa.
6, water tank method flow resistance instrument according to claim 1, it is characterized in that: the test specimen breathing area of described test specimen casket (3) is 2000-5000mm
2
7, water tank method flow resistance instrument according to claim 1 is characterized in that: described graduated cylinder (4), its capacity be at 200-400CC, diameter 80-120mm, and the osculum greater than the water inlet pipe diameter is arranged at the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201400213U CN201319029Y (en) | 2008-10-21 | 2008-10-21 | Flow resistance instrument adopting water tank method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201400213U CN201319029Y (en) | 2008-10-21 | 2008-10-21 | Flow resistance instrument adopting water tank method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201319029Y true CN201319029Y (en) | 2009-09-30 |
Family
ID=41197793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201400213U Expired - Fee Related CN201319029Y (en) | 2008-10-21 | 2008-10-21 | Flow resistance instrument adopting water tank method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201319029Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674535A (en) * | 2013-12-12 | 2014-03-26 | 中国航空工业集团公司第六三一研究所 | Method for quickly detecting flow resistance characteristic of liquid cooling quick coupling |
| CN104458200A (en) * | 2013-09-12 | 2015-03-25 | 无锡明韵远声科技有限公司 | Instrument for measuring air flow resistance |
| CN108489855A (en) * | 2018-04-12 | 2018-09-04 | 合肥工业大学 | A kind of sound-absorbing material flow resistance measuring instrument of temperature-controllable |
| CN108982332A (en) * | 2018-09-26 | 2018-12-11 | 常州北埠电子技术有限公司 | A kind of the sound resistance test method and its test device of sound-absorbing material |
| CN110333176A (en) * | 2019-08-02 | 2019-10-15 | 柳州汉西鸣建材发展有限公司 | A kind of device and its measurement method of flux controllable measurement acoustics flow resistance |
| CN113514551A (en) * | 2021-07-12 | 2021-10-19 | 合肥工业大学 | Porous sound absorbing material steady state flow resistance measuring cylinder |
-
2008
- 2008-10-21 CN CNU2008201400213U patent/CN201319029Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458200A (en) * | 2013-09-12 | 2015-03-25 | 无锡明韵远声科技有限公司 | Instrument for measuring air flow resistance |
| CN103674535A (en) * | 2013-12-12 | 2014-03-26 | 中国航空工业集团公司第六三一研究所 | Method for quickly detecting flow resistance characteristic of liquid cooling quick coupling |
| CN103674535B (en) * | 2013-12-12 | 2016-04-20 | 中国航空工业集团公司第六三一研究所 | Liquid cooling rapid-acting coupling flow resistance characteristic method for quick |
| CN108489855A (en) * | 2018-04-12 | 2018-09-04 | 合肥工业大学 | A kind of sound-absorbing material flow resistance measuring instrument of temperature-controllable |
| CN108489855B (en) * | 2018-04-12 | 2023-12-05 | 合肥工业大学 | Temperature-controllable sound-absorbing material flow resistance measuring instrument |
| CN108982332A (en) * | 2018-09-26 | 2018-12-11 | 常州北埠电子技术有限公司 | A kind of the sound resistance test method and its test device of sound-absorbing material |
| CN110333176A (en) * | 2019-08-02 | 2019-10-15 | 柳州汉西鸣建材发展有限公司 | A kind of device and its measurement method of flux controllable measurement acoustics flow resistance |
| CN113514551A (en) * | 2021-07-12 | 2021-10-19 | 合肥工业大学 | Porous sound absorbing material steady state flow resistance measuring cylinder |
| CN113514551B (en) * | 2021-07-12 | 2023-06-27 | 合肥工业大学 | Steady state flow resistance measuring tube of porous sound absorbing material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201319029Y (en) | Flow resistance instrument adopting water tank method | |
| CN108019622B (en) | A kind of calculation method of the pipeline leakage positioning based on pressure difference | |
| CN107907595B (en) | Sound absorption coefficient and sound insulation amount measuring device and measuring method for sound wave oblique incidence material | |
| CN201303947Y (en) | Medical ultrasonic detection system | |
| CN101416884B (en) | Medical ultrasonic detection system | |
| CN102798586B (en) | Novel testing system for testing air permeability of micro air-permeable film | |
| ATE375279T1 (en) | LEAK TEST OF THE MAIN AIR LINE OF A TRAIN | |
| CN204705570U (en) | The permeability experimental provision that a kind of automatic pressure detects | |
| CN204064392U (en) | A kind of bubble method liquid level emasuring device | |
| CN201476822U (en) | Dual-channel pore plate gas flow measuring device with multiple built-in parameters | |
| CN101876617B (en) | Method for improving accuracy of hydrogen storage performance measurement by constant volume method | |
| CN201607253U (en) | Device for testing air duct pressure bearing air leakage and pipe wall pressure resisting deflection | |
| CN208043727U (en) | A kind of online dew-point detecting device of iron and steel enterprise's air compression system | |
| CN109752083B (en) | Method for detecting flushing noise of toilet by sound power level parallelepiped measuring surface method | |
| CN201173839Y (en) | Mechanical type differential pressure meter with temperature and humidity directive function | |
| CN209894246U (en) | Ultrasonic flowmeter | |
| CN109752075B (en) | Method for detecting flushing noise of toilet by effective sensing noise level pulse measurement method | |
| CN2826387Y (en) | On-line calibration connecting device of dynamic pressure sensor | |
| CN202582616U (en) | Integrated intelligent Verabar flow meter | |
| CN204286511U (en) | Integration temperature head compensating vortex street effusion meter | |
| CN204085581U (en) | A kind of low pressure loss differential pressure flowmeter | |
| CN206469947U (en) | A kind of Site Service type method of standard table flow detector | |
| RU2126140C1 (en) | Method measuring flow rate of medium by flowmeters of alternating pressure differential with narrowing devices | |
| CN201014980Y (en) | Vacuum drying terminal judging instrument | |
| CN202166442U (en) | Sonic nozzle with ultrasonic wave sonic speed sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Song Gang Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090930 Termination date: 20111021 |