CN205027640U - Automatic ventilative volume tester of high accuracy - Google Patents
Automatic ventilative volume tester of high accuracy Download PDFInfo
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- CN205027640U CN205027640U CN201520667598.XU CN201520667598U CN205027640U CN 205027640 U CN205027640 U CN 205027640U CN 201520667598 U CN201520667598 U CN 201520667598U CN 205027640 U CN205027640 U CN 205027640U
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Abstract
The utility model discloses an automatic ventilative volume tester of high accuracy, including the upper reaches graduated flask, a port covers there is the sample, and the other end is connected with dirty graduated flask, the nozzle, the pipe connector is in between upper reaches graduated flask and dirty graduated flask, dirty graduated flask, another port of relative nozzle passes through hose connection updraft ventilator, in a differential pressure sensor, an input placed the upper reaches graduated flask in, the atmosphere was placed in to another input, and its output has been coupled the data processing unit, in the 2nd differential pressure sensor, an input placed the upper reaches graduated flask in, in dirty graduated flask was placed in to another input, its output was coupled the data processing unit, adjusting device adjusts updraft ventilator's fan rotational speed to default according to the control signal of data processing unit transmission, the data processing unit calculates the ventilative volume of sample according to the diameter of a differential pressure sensor and the 2nd differential pressure sensor's output and nozzle, the digital display unit is coupled the data processing unit. The utility model has the advantages of high automation degree, the high optimization performance of precision.
Description
Technical field
The utility model relates to airtightness measurement field, particularly relates to a kind of High Precision Automatic Air permenbility tester.
Background technology
Gas penetration potential should be called air permeability or Air permenbility strictly.It refers to the performance of air permeable fabric (comprising traditional textile and goods, nonwoven fabrics, paper making felt woollen blanket, high saturating paper, filtrate, leather, PE and PTFE film, soft polyurethane foam, various felt etc.), specifically with under the Area of Sample specified, pressure drop and time conditions, air-flow is perpendicular through the rate representation of sample.
Be in the patent documentation (hereinafter referred to as documents 1) of CN102798586A, disclose a kind of novel test system for micro-ventilated membrane Air permenbility test at publication number, this instrument can test the pressure reduction Air permenbility of the multiple composite ventilated membranes such as heating pad ventilated membrane, dehydrating breather ventilated membrane, deodorant for refrigerator ventilated membrane and individual layer ventilated membrane, and it can test sample Air permenbility scope between fiber-like fabric (high Air permenbility) and plastic sheeting (low Air permenbility).This instrument comprises constant-voltage system, test chamber, discharge record system three part composition, test pressure differential scope is that 10Pa ~ 100000Pa is adjustable, sample area is that 1cm2 ~ 500cm2 is adjustable, the Air permenbility test duration is that 1min ~ 300min is adjustable, test result can need to be set to the different measurement unit of s/cc, L/s, s/cc/m2, L/s/m2, L/m2/Pa, L/m2/Pa/s, mm/s according to test, and can carry out the conversion between constituent parts.
Above-mentioned novel test system can observe the liquid level in stalk intuitively by stalk, can determine the gas penetration potential of sample; But it is difficult to accomplish high-precision measurement;
In addition, its automaticity is not high, is difficult to realize parameter accurately and regulates.
Summary of the invention
The purpose of this utility model overcomes or slow down the part at least above-mentioned shortcoming, and hereby provide a kind of High Precision Automatic Air permenbility tester, it comprises:
Upper reaches graduated cylinder, Single port is coated with sample, and the other end is connected with dirty graduated cylinder,
Nozzle, pipe is connected between upper reaches graduated cylinder and dirty graduated cylinder,
Dirty graduated cylinder, the another port of relative nozzle connects extractor fan by flexible pipe,
First differential pressure pickup, an input end is placed in the graduated cylinder of upper reaches, and another input end is placed in air, and its output terminal is coupled with data processing unit,
Second differential pressure pickup, an input end is placed in the graduated cylinder of upper reaches, and another input end is placed in dirty graduated cylinder, and its output terminal couples data processing unit,
Feedback regulation device, the control signal according to data processing unit transmission regulates the rotation speed of fan of described extractor fan to preset value,
Data processing unit, also calculates the Air permenbility of described sample according to described first differential pressure pickup and the output of the second differential pressure pickup and the diameter of described nozzle,
Digital display unit, couples data processing unit, with Air permenbility described in digital display.
Preferably, described sample is pressed together between sample pressure head and described upper reaches graduated cylinder port.
Further, the other end of the relative sample of described sample pressure head is connected with operating rope, and described operating rope is connected to the shaft of control lever after steering axle turns to 180 degree.
Preferably, the port of described dirty buret connecting hose is provided with filter gas element.
Further, valve is provided with at the tube wall of described dirty buret.
Preferably, described data processing unit connects printing device by communication serial ports.
The utility model is intended to, detected by the pressure of high-precision differential pressure pickup to upper reaches graduated cylinder and dirty graduated cylinder, control the pressure of extractor fan to upper reaches graduated cylinder and dirty graduated cylinder by data processing unit again to regulate, so that calculate the Air permenbility of sample after the pressure reduction of standard sample both sides, draw the gas permeability test result of sample.
Accompanying drawing explanation
Describe these and other aspect of the present utility model in further detail now with reference to appended accompanying drawing, it is depicted as currently preferred embodiment of the present utility model.Wherein:
Fig. 1 is the fundamental diagram of High Precision Automatic Air permenbility tester.
In figure: 1, upper reaches graduated cylinder; 2, dirty graduated cylinder; 21, door lock; 22, gas element is filtered; 3, nozzle; 4, sample; 51, sample pressure head 5; 52, operating rope; 53, steering axle; 54, control lever; 6, flexible pipe.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
As shown in Figure 1, a kind of High Precision Automatic Air permenbility tester, comprises upper reaches graduated cylinder, and lower port is connected with dirty graduated cylinder 2; Nozzle 3, pipe is connected between upper reaches graduated cylinder and dirty graduated cylinder 2; Dirty graduated cylinder 2, the another port of relative nozzle 3 connects extractor fan by flexible pipe 6; First differential pressure pickup, an input end is placed in the graduated cylinder of upper reaches, and another input end is placed in air, and its output terminal is coupled with data processing unit; Second differential pressure pickup, an input end is placed in the graduated cylinder of upper reaches, and another input end is placed in dirty graduated cylinder 2, and its output terminal couples data processing unit; Regulating device, couples data processing unit and extractor fan; Digital display unit, couples data processing unit, with digital display Air permenbility.
The upper port of the present embodiment upper reaches graduated cylinder has the platform holding sample 5, after sample 5 is positioned over this platform, is put down by sample pressure head 5, makes sample pressure head 5 naturally by sample 5 concora crush on the platform, now sample 5 i.e. installation.
After this open extractor fan, the air that the blower fan suction of extractor fan is extraneous is discharged by flexible pipe 6 after sample 5, upper reaches graduated cylinder, nozzle 3, dirty graduated cylinder 2.
So, when extractor fan steady operation, upper reaches graduated cylinder and dirty graduated cylinder 2 keep stable pressure P1 and P2 respectively.If dividing into external air is P0, then namely the pressure differential that the first differential pressure pickup detects is PA=P0-P1, and namely the pressure differential that the second differential pressure pickup detects is PB=P1-P2.PA is the pressure differential between upper reaches graduated cylinder and dirty graduated cylinder 2, and PB is the pressure differential of sample 5 both sides.
Now, data processing unit regulates the rotation speed of fan of extractor fan by regulating device, makes PB level off to preset value (being generally 50Pa, 100P or 200Pa); Diameter again in conjunction with PA and nozzle 3 calculates Air permenbility.
Meanwhile, with data processing unit after obtaining Air permenbility, can connected digital display device and charactron be passed through, show intuitively.
Pass through technique scheme, the Air permenbility of sample 5 is measured, on the one hand by can necessarily ensure accurately measuring of Air permenbility to the high precision differential pressure pickup preset and use of PB, different by the preset value of PB on the other hand, under can varying environment being measured, the throughput of sample 5.
It is worth mentioning that, the data processing unit of the present embodiment selects single-chip microcomputer, in order to realize the function of above-mentioned involved data processing unit, program editing need be carried out to the single-chip microcomputer of the present embodiment, but the Single Chip Microcomputer (SCM) program part involved by the present embodiment is simply, is easy to realize, and is that those skilled in the art can obtain in conjunction with its technological means known; And data processing unit of the present utility model can also in conjunction with comparer.The circuit chip of the inherent structures such as amplifier is realized.So the present embodiment is only that application single-chip microcomputer uses as data processing unit, and is not limited thereto.
In addition, the present embodiment is provided with filter gas element 22 in dirty graduated cylinder 2, prevents the molecule through sample 5 from entering extractor fan, affects the work of blower fan;
Further, conveniently to the cleaning of the molecule hoarded in dirty graduated cylinder 2, the tube wall of dirty graduated cylinder 2 arranges door lock 21; After door lock 21 is opened, the molecule in dirty graduated cylinder 2 can be cleaned easily.
Moreover the sample pressure head 5 of the present embodiment is hung in one end of operating rope 52, the other end of operating rope 52 is walked around steering axle 53 and is connected on control lever 54, and so staff is by operation control lever 54, can rise fast or press down sample pressure head 5.
In order to improve the automaticity of the present embodiment further, the sample pressure head 5 of the present embodiment after powered up with the adhesive of platform electromagnetism.
Claims (6)
1. a High Precision Automatic Air permenbility tester, is characterized in that comprising:
Upper reaches graduated cylinder, Single port is coated with sample, and the other end is connected with dirty graduated cylinder;
Nozzle, pipe is connected between upper reaches graduated cylinder and dirty graduated cylinder;
Dirty graduated cylinder, the another port of relative nozzle connects extractor fan by flexible pipe;
First differential pressure pickup, an input end is placed in the graduated cylinder of upper reaches, and another input end is placed in air, and its output terminal is coupled with data processing unit;
Second differential pressure pickup, an input end is placed in the graduated cylinder of upper reaches, and another input end is placed in dirty graduated cylinder, and its output terminal couples data processing unit;
Regulating device, the control signal according to data processing unit transmission regulates the rotation speed of fan of described extractor fan to preset value;
Data processing unit, also calculates the Air permenbility of described sample according to described first differential pressure pickup and the output of the second differential pressure pickup and the diameter of described nozzle;
Digital display unit, couples data processing unit, with Air permenbility described in digital display.
2. High Precision Automatic Air permenbility tester according to claim 1, is characterized in that, described sample is pressed together between sample pressure head and described upper reaches graduated cylinder port.
3. High Precision Automatic Air permenbility tester according to claim 2, is characterized in that, the other end of the relative sample of described sample pressure head is connected with operating rope, and described operating rope is connected to the shaft of control lever after steering axle turns to 180 degree.
4. High Precision Automatic Air permenbility tester according to claim 1, is characterized in that, the port of described dirty buret connecting hose is provided with filter gas element.
5. High Precision Automatic Air permenbility tester according to claim 4, is characterized in that, is provided with valve at the tube wall of described dirty buret.
6. High Precision Automatic Air permenbility tester according to claim 1, is characterized in that, described data processing unit connects printing device by communication serial ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520667598.XU CN205027640U (en) | 2015-08-30 | 2015-08-30 | Automatic ventilative volume tester of high accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520667598.XU CN205027640U (en) | 2015-08-30 | 2015-08-30 | Automatic ventilative volume tester of high accuracy |
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| CN205027640U true CN205027640U (en) | 2016-02-10 |
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| CN201520667598.XU Active CN205027640U (en) | 2015-08-30 | 2015-08-30 | Automatic ventilative volume tester of high accuracy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115877A (en) * | 2015-08-30 | 2015-12-02 | 武汉国量仪器有限公司 | Automatic high-precision ventilation volume tester |
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2015
- 2015-08-30 CN CN201520667598.XU patent/CN205027640U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115877A (en) * | 2015-08-30 | 2015-12-02 | 武汉国量仪器有限公司 | Automatic high-precision ventilation volume tester |
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