CN113418664A - Airtight detector - Google Patents
Airtight detector Download PDFInfo
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- CN113418664A CN113418664A CN202110834572.XA CN202110834572A CN113418664A CN 113418664 A CN113418664 A CN 113418664A CN 202110834572 A CN202110834572 A CN 202110834572A CN 113418664 A CN113418664 A CN 113418664A
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- 238000001514 detection method Methods 0.000 claims abstract description 36
- 239000006096 absorbing agent Substances 0.000 abstract description 33
- 238000013461 design Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to an air tightness detection device of a filter absorber, in particular to an air tightness detector, wherein a three-phase electric output end of a frequency converter is connected with an air pump, a power supply end of an industrial programmable controller is electrically connected with external one-phase alternating current through a power switch, an output end of the industrial programmable controller is connected with a control end of the frequency converter, the industrial programmable controller is also connected with a human-computer interface, an output end of the air pump is connected with a mass flowmeter, the mass flowmeter is connected with an air path output interface, a pressure transmitter is connected with an air path input interface, and the pressure transmitter, the mass flowmeter and an input end of the industrial programmable controller are connected. According to the invention, the air pump is adopted to provide an air source, and the air pump is adjusted through the industrial programmable controller and the frequency converter, so that the automatic adjustment of different air flow rates required by different products is realized, and the detection efficiency is improved; a high-precision mass flowmeter and a pressure sensor are adopted to realize accurate quantitative detection; and a movable miniaturization design concept is adopted, so that the device is convenient to use on site.
Description
Technical Field
The invention relates to an air tightness detection device of a filter absorber, in particular to an air tightness detector.
Background
The air tightness is an important technical parameter of the filter absorber, the air tightness is detected by an air tightness detection device, the currently used air tightness detection device mainly comprises 2U-shaped pressure gauges, a pore plate flowmeter and a regulating screw clamp, and an air source is compressed air. When the air tightness is detected, the compressed air is started, the adjusting screw clamp is unscrewed, the compressed air is slowly started, the adjusting screw clamp is rotated, the pressure of 1U-shaped pressure gauge reaches the specified value and is balanced, the other U-shaped pressure gauge is observed whether the pressure difference exists or not, if the pressure difference does not exist, the air tightness of the filter absorber is considered to be qualified, otherwise, the air tightness is not qualified.
The existing technical disadvantages are mainly:
(1) the U-shaped pressure gauge has low accuracy and is easy to cause reading errors;
(2) the pore plate flowmeter is selected, the pore plate flowmeter which can contain the measurement range of the air leakage of the tested filter absorber is selected according to the air tightness index of the tested filter absorber, the measurement range of the glass pore plate flowmeter is small, the excess part cannot accurately read the flow, the air leakage cannot be accurately detected, the air tightness measurement of the tested filter absorber can only be qualitatively detected, and cannot be quantitatively detected;
(3) when detecting different products, need to change the glass orifice plate flowmeter that corresponds, complex operation.
Disclosure of Invention
The invention aims to solve the problems that the air tightness of the existing filter absorber cannot be quantitatively detected, the detection operation is complicated and the like; the air tightness detector is provided, an air pump is adopted to provide an air source, the air pump is adjusted through an industrial programmable controller and a frequency converter, automatic adjustment of different air flow rates required by different products is achieved, and detection efficiency is improved; a high-precision mass flowmeter and a pressure sensor are adopted to realize accurate quantitative detection; and a movable miniaturization design concept is adopted, so that the device is convenient to use on site.
The invention is realized by adopting the following technical scheme: an air tightness detector comprises a cabinet body, wherein a human-computer interface, a power switch, a detection switch, an air circuit input interface and an air circuit output interface are arranged on the cabinet body, an industrial programmable controller, a frequency converter, a pressure transmitter, a mass flow meter and an air pump are arranged in the cabinet body, the power side of the frequency converter is connected with external alternating current through a normally open contact of a contactor KM, one input end of the frequency converter is also connected with external one-phase alternating current through the detection switch, one output end of the frequency converter is connected with a zero line through the contactor KM, the three-phase electrical output end of the frequency converter is connected with the air pump, the power end of the industrial programmable controller is electrically connected with the external one-phase alternating current through the power switch, the output end of the industrial programmable controller is connected with the control end of the frequency converter, the industrial programmable controller is also connected with the human-computer interface, the output end of the air pump is connected with the mass flow meter, and the mass flow meter is connected with the air circuit output interface, the pressure transmitter is connected with the gas path input interface, and the pressure transmitter, the mass flowmeter and the input end of the industrial programmable controller are connected. During detection, respectively connecting the air inlet of the tested filter absorber with the air path output interface of the air tightness detector; the air outlet of the filter absorber is connected with the air path input interface of the air tightness detector. When the power switch is pressed down, the air tightness detector is in a standby state, after the specified pressure value and the alarm parameter are set through the man-machine interface, the detection switch is pressed down, the contactor KM is electrified, the normally open contact of the contactor KM is closed, and therefore the air pump is adjusted to work, the air pump outputs a certain amount of air flow, and the pressure value of the pressure transmitter reaches the specified value. After balancing, observing the air flow entering the filter absorber through the mass flow meter, wherein the ratio of the air flow measured by the mass flow meter to the rated air flow of the filter absorber to be tested is an air leakage coefficient value, and reading the air leakage coefficient value on a human-computer interface.
The air tightness detector is characterized in that the industrial programmable controller is also connected with an alarm.
The air tightness detector further comprises a power supply module and an analog input module, wherein the input end of the power supply module is connected with external alternating current, the output end of the power supply module is connected with a human-computer interface, the pressure transmitter and the mass flow meter, and the pressure transmitter and the mass flow meter are connected with the industrial programmable controller through the analog input module.
In the air tightness detector, the circuit for connecting the frequency converter with the external alternating current is also provided with the fuse.
The invention has the following advantages:
1. the air tightness detector meets the requirements of GJB 564.1-1988 on air tightness of performance test method of filter absorber, and the air leakage coefficient is calculated and stored by an industrial programmable controller and is digitally displayed on a human-computer interface, so that the reading error is avoided, and the detection result is convenient to trace.
2. And a high-precision mass flowmeter and a pressure sensor are adopted, so that quantitative and precise detection of the air tightness of the filtering absorber is realized.
3. But air flow automatically regulated has solved when current airtight detection device detects different products, need change the glass orifice plate flowmeter that corresponds, and complex operation's problem has improved detection efficiency.
4. The system has a man-machine interaction interface and is simple to operate.
5. And a movable miniaturization design concept is adopted, so that the device is convenient to use on site.
Drawings
FIG. 1 is a view showing a constitution of an air tightness detecting instrument.
Figure 2 is a schematic of a tested filter absorber.
FIG. 3 is a schematic diagram of the control of the air tightness detector.
In the figure: 1-human-machine interface; 2-an alarm; 3-a detection switch; 4-power switch; 5-industrial programmable controller; 6-a frequency converter; 7-a pressure transmitter; 8, a gas path input interface; 9-gas path output interface; 10-mass flow meter; 11-an air pump; 12-test filter absorber; 13-a filter absorber air inlet; 14-Filter absorber Outlet.
Detailed Description
The invention provides an air tightness detector which comprises an industrial programmable controller 5, an air pump 11, a frequency converter 6, a pressure transmitter 7, a mass flowmeter 10, a human-computer interface 1, an alarm 2, a power switch 4, a detection switch 3, an air path input interface 8, an air path output interface 9 and the like. The air leakage detection method meets the requirements of GJB 564.1-1988 air tightness of the performance test method of the filter absorber, and can realize the air leakage detection range as follows: (1.6-33.2) L/min.
The air tightness detector is shown in figure 1, the control principle is shown in figure 3, and the air tightness detector comprises a human-computer interface 1, an alarm 2, a power switch 4, a detection switch 3, an industrial programmable controller 5, a frequency converter 6, a pressure transmitter 7, an air path input interface 8, an air path output interface 9, a mass flowmeter 10 and an air pump 11. The functions of the constituent parts are as follows:
a) the human-computer interface is used for human-computer interaction, setting control parameters, displaying parameters such as air flow, pressure, air leakage coefficient and the like;
b) an alarm device: when the air leakage of the tested filter absorber reaches or exceeds the upper limit of the allowable air leakage, the alarm flashes to alarm;
c) a power switch: the airtight detector is used for controlling the on-off of a power supply;
d) a detection switch: the power supply on-off control circuit is used for controlling the on-off of the power supply of the detection loop;
e) the industrial programmable controller is used for controlling the frequency converter and the air pump and is connected with the analog quantity input module PCI;
f) a frequency converter: for controlling the rotational speed of the air pump;
g) the pressure transmitter: the pressure detection device is used for detecting the pressure in the tested filter absorber, and the detection value is displayed through a human-computer interface;
h) gas circuit input interface: used for connecting with the air outlet of the filter absorber;
i) gas circuit output interface: for connection to a filter absorber air inlet;
j) mass flow meter: the flow rate detection device is used for detecting the flow rate introduced into the tested filter absorber, and the detection value is displayed through a human-computer interface;
k) an air pump: for providing a source of gas.
The action principle of the air tightness detector is as follows: a certain flow of air was introduced into the tested filter absorber, resulting in a certain positive pressure. The air tightness of the filter absorber was assessed by observing the amount of air flow into the filter absorber, expressed as a leakage factor in%.
The air leakage coefficient is the ratio of the air leakage of the tested filter absorber to the rated air quantity thereof.
In specific implementation, as shown in fig. 1, the air inlet 13 of the tested filter absorber is respectively connected with the air path output interface 9 of the air tightness detector; the air outlet 14 of the filter absorber is connected with the air path input interface 8 of the air tightness detector. The air tightness detector is in a standby state by pressing the power switch 4, after the specified pressure value (2940 Pa +/-100 Pa) and the alarm parameter are set through the man-machine interface, the detection switch 3 is pressed, the industrial programmable controller controls the frequency converter 6 to work according to the control principle of the figure 3, so that the air pump 11 is regulated to work, and the air pump 11 outputs a certain amount of air flow to enable the pressure value of the pressure transmitter 7 to reach the specified value. After balancing, the air flow entering the filtering absorber is observed through the mass flow meter, and the air leakage coefficient value is read on a human-computer interface.
The component parameters in the control principle of fig. 3 are shown in table 1.
TABLE 1 technical parameters of the main components
| Serial number | (symbol) | Name (R) | Type and specification | Number of |
| 1 | FU1 FU2 FU3 | Fuse protector | RT18-1 | 3 |
| 2 | SB1 SB2 | Push button | XB2BA11C | 2 |
| 3 | KM | AC contactor | CJX2-0910 | 1 |
| 4 | FR | Frequency converter | SHF-1.5K | 1 |
| 5 | BZ | Alarm device | TL-702SI/V | 1 |
| 6 | M | Air pump | D55 | 1 |
| 7 | FT | Mass flowmeter | CS200A013N040LDGGVH | 1 |
| 8 | BP | Pressure transmitter | KYBG03MIP7C2-1 | 1 |
| 9 | PCI | Analog input module | CP1W-AD041 | 1 |
| 10 | PLC | Programmable controller | COIE-N30SDR-A | 1 |
| 11 | TC | Power supply module | DR-4524 | 1 |
| 12 | HMI | Human-machine interface | MT8070IH | 1 |
The key points of the invention are as follows:
1. the air flow of the air pump is adjusted by adopting an industrial programmable controller and a frequency converter, so that the automatic adjustment of different air flows required by different products is realized, and the detection efficiency is improved; detection range: the air leakage detection range is (1.6-33.2) L/min, and the air tightness detection requirement of the 12-type filter absorber can be met;
2. and a high-precision mass flowmeter and a pressure sensor are adopted, so that quantitative and precise detection of the air tightness of the filtering absorber is realized.
3. The device is miniaturized, movable and convenient to use on site;
4. the system has a man-machine interaction interface and is simple to operate.
Claims (4)
1. An air tightness detector is characterized in that: comprises a cabinet body, a human-computer interface (1), a power switch (4), a detection switch (3), a gas circuit input interface (8) and a gas circuit output interface (9) are arranged on the cabinet body, an industrial programmable controller (5), a frequency converter (6), a pressure transmitter (7), a mass flow meter (10) and an air pump (11) are arranged in the cabinet body, wherein the power side of the frequency converter (6) is connected with external alternating current through a normally open contact of a contactor KM, one input end of the frequency converter (6) is also connected with external one-phase alternating current through the detection switch (3), one output end of the frequency converter (6) is connected with a zero line through the contactor KM, the three-phase output end of the frequency converter (6) is connected with the air pump (11), the power end of the industrial programmable controller (5) is electrically connected with the external one-phase alternating current through the power switch, the output end of the industrial programmable controller (5) is connected with the control end of the frequency converter (6), the industrial programmable controller (5) is further connected with the human-computer interface (1), the output end of the air pump (11) is connected with the mass flow meter (10), the mass flow meter (10) is connected with the air path output interface (9), the pressure transmitter (7) is connected with the air path input interface (8), and the pressure transmitter (7), the mass flow meter (10) and the input end of the industrial programmable controller (5) are connected.
2. The air-tightness detector of claim 1, wherein: the industrial programmable controller (5) is also connected with an alarm (2).
3. The airtightness detector according to claim 1 or 2, wherein: the system is characterized by further comprising a power supply module and an analog input module, wherein the input end of the power supply module is connected with external alternating current, the output end of the power supply module is connected with a human-computer interface (1), a pressure transmitter (7) and a mass flow meter (10), and the pressure transmitter (7) and the mass flow meter (10) are connected with an industrial programmable controller (5) through the analog input module.
4. The airtightness detector according to claim 1 or 2, wherein: and a fuse is also arranged on a line of the frequency converter (6) connected with external alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834572.XA CN113418664A (en) | 2021-07-23 | 2021-07-23 | Airtight detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834572.XA CN113418664A (en) | 2021-07-23 | 2021-07-23 | Airtight detector |
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| Publication Number | Publication Date |
|---|---|
| CN113418664A true CN113418664A (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110834572.XA Pending CN113418664A (en) | 2021-07-23 | 2021-07-23 | Airtight detector |
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| Country | Link |
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| CN (1) | CN113418664A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2918396Y (en) * | 2005-12-14 | 2007-07-04 | 陈超 | Automatic control horizontal helix discharging centrifugal dehydration machine |
| CN200993625Y (en) * | 2006-12-22 | 2007-12-19 | 北京城建安装工程有限公司 | Wind pipe leakage test instrument |
| CN209085868U (en) * | 2018-12-24 | 2019-07-09 | 杭州众旺无损检测设备有限公司 | Civil air defense constructions and installations air-leakage detector |
| CN212027905U (en) * | 2020-03-30 | 2020-11-27 | 山西新华防化装备研究院有限公司 | Black smoke metal filter unit of fixed source engine |
-
2021
- 2021-07-23 CN CN202110834572.XA patent/CN113418664A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2918396Y (en) * | 2005-12-14 | 2007-07-04 | 陈超 | Automatic control horizontal helix discharging centrifugal dehydration machine |
| CN200993625Y (en) * | 2006-12-22 | 2007-12-19 | 北京城建安装工程有限公司 | Wind pipe leakage test instrument |
| CN209085868U (en) * | 2018-12-24 | 2019-07-09 | 杭州众旺无损检测设备有限公司 | Civil air defense constructions and installations air-leakage detector |
| CN212027905U (en) * | 2020-03-30 | 2020-11-27 | 山西新华防化装备研究院有限公司 | Black smoke metal filter unit of fixed source engine |
Non-Patent Citations (1)
| Title |
|---|
| 15232883075: ""三垦变频器使用说明书SAMCO-VM06"", 《道客巴巴》 * |
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Application publication date: 20210921 |