CN104819812B - Glass fiber reinforced plastic septic tank airtightness detection method - Google Patents
Glass fiber reinforced plastic septic tank airtightness detection method Download PDFInfo
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Abstract
The invention discloses a glass fiber reinforced plastic septic tank airtightness detection method. One end of a water column pipe with scales is vertically fixed in an enclosed water tank to form a water column instrument, the water column instrument, an air pump and a glass fiber reinforced plastic septic tank are connected, the airtightness of the glass fiber reinforced plastic septic tank is detected through an air differential pressure method, the inner wall of the water column pipe is provided with a water level sensor connected with a digital display meter, and the digital display meter is connected with a data collector. Values on the digital display meter are acquired every first preset time, the absolute values of differences between the values and a first preset water level value are first real-time water level deviation, a first accumulated water level deviation is defined as an average value of i first real-time water level deviations within i first preset time, when the first accumulated water level deviation ranges from zero to a predefined first threshold value, it is determined that the glass fiber reinforced plastic septic tank does not leak air, and otherwise, it is determined that the air is leaked. The glass fiber reinforced plastic septic tank airtightness detection method reduces the workload of examination personnel and improves the precision and the work efficiency.
Description
Technical field
The present invention relates to the air-tightness detection method of fibre glass product manufacture, and in particular to a kind of glass toughening manure pit air-tightness inspection
Survey method.
Background technology
The container class product of loading liquid is generally used for, is both needed to before dispatching from the factory through leak detection, conventional air-leakage test side
Method, typically has bowssening, water flood, foam method, for the air-leakage test of the product of small volume, can immerse water after inflating
Hunt leak in case, or the leak detection of product water flood or foam method leak detection, larger for volume and heavier product, such as glass fiber reinforced plastics septic
Pond adopts said method, then there is a problem of it is cumbersome, waste water, inefficiency and precision it is poor.
The content of the invention
It is an object of the invention to solve at least the above and/or defect, and provide at least will be described later excellent
Point.
It is an object of the invention to passing through air pressure difference method carries out the air-leakage test of glass toughening manure pit, only need to prepare
Simple water column instrument can complete air-leakage test, simple to operate, pollution-free to product to be detected.
A further object of the invention is, by the water level digitized of water column instrument, to compare after air pump maintenance water column pipe pressure
In the individual time period, water column pipe water level is reduced with respect to the accumulative water level deviation of initial value judging glass toughening manure pit whether gas leakage
The workload of reviewer, improves precision and work efficiency.
In order to realize these purposes of the invention and further advantage, there is provided a kind of glass toughening manure pit air-tightness inspection
Survey method, comprises the following steps：
Step one, one end of water column pipe with a scale is vertically fixed in the water tank of closing composition water column instrument, the water
Case and water column pipe junction seal, and water tank internal water flooding amount is the 1/3-2/3 of its volume, one end water tank of the water column pipe
In aqueous envelope, water column instrument connected with the air pump with the first air valve by the first sebific duct, and the water column inside pipe wall is provided with connection number
The level sensor of aobvious table, the digital display meter connect a data acquisition unit；
Step 2, the one of import for closing glass toughening manure pit using the hush panel with detection adapter and fluid sealant,
Other imports of glass toughening manure pit, one end of the detection adapter and the glass are closed using special-purpose sealing plate and fluid sealant
The inside connection of tempering manure pit, the other end connected with the first sebific duct by the second sebific duct, described to detect the other end taken over and the
The second air valve is provided between two sebific ducts；
Step 3, the first air valve of opening, the second air valve and air pump, treat that the numerical value on the digital display meter on water column instrument reaches first
During preset water level value, the first air valve and air pump is closed, the water level value on a digital display meter is gathered at interval of the first Preset Time is
First Real-time Water place value, the first real time water level deviation are that the first Real-time Water place value is exhausted with the difference of the first preset water level value
To value, the meansigma methodss that the first accumulative water level deviation is i the first real time water level deviation in i the first Preset Time are defined,
When the first accumulative water level deviation is located at 0 to predefined first boundary value, then judge that glass toughening manure pit is air tight,
Otherwise, then judge its gas leakage.
Preferably, described glass toughening manure pit air-tightness detection method, detected water column instrument before the step 3
Air-tightness, open the first air valve and air pump, close the second air valve, treat that the numerical value of the digital display meter on water column instrument reaches second and presets
During water level value, the first air valve and air pump is closed, it is second to gather the water level value on a digital display meter at interval of the second Preset Time
Real-time Water place value, the second real time water level deviation are that the second Real-time Water place value is absolute with the difference of the second preset water level value
Value, defines the meansigma methodss that the second accumulative water level deviation is j the second real time water level deviation in j the second Preset Time, when
When second accumulative water level deviation is located at 0 to predefined second boundary value, then judge that water column instrument is air tight, into step
Three, otherwise, then judge water column instrument gas leakage, change when water column instrument extremely detects that water column instrument is air tight and enter step 3.
Preferably, described glass toughening manure pit air-tightness detection method, the air pump are inflator pump, the water tank
Top is provided with air inlet, and the inflator pump is connected with the air inlet by the first sebific duct, and the water column Guan Weiyu water tanks are fixed
One end and atmosphere.
Preferably, described glass toughening manure pit air-tightness detection method, the air pump be vacuum pump, the vacuum pump
Connected with the other end of the water column pipe by the first sebific duct.
Preferably, described glass toughening manure pit air-tightness detection method, the digital display meter are also associated with alarm device,
Which is set to, and sends the first warning when the described first accumulative water level deviation is more than predefined first boundary value；When described
Two accumulative water level deviations send the second warning when being more than predefined second boundary value.
Preferably, described glass toughening manure pit air-tightness detection method, the volume of the water tank is 6-9L.
Preferably, described glass toughening manure pit air-tightness detection method, the first preset water level value are 1000mm,
First Preset Time is 10-20s, and i is 30-60, and the first boundary value is 0-20mm.
Preferably, described glass toughening manure pit air-tightness detection method, the second preset water level value are 1000mm,
Second Preset Time is 10-20s, and j is 20-30, and second boundary value is 0-10mm.
The present invention has the advantages that：
Firstth, the air-leakage test of glass toughening manure pit is carried out by air pressure difference method, only need to prepare simple water column instrument
Air-leakage test can be completed, it is simple to operate, it is pollution-free to product to be detected；
Secondth, by the water level digitized of water column instrument, compare water column in a time period after air pump maintains water column pipe pressure
Pipe water level with respect to initial value accumulative water level deviation judging glass toughening manure pit whether gas leakage, compare it is conventional using manually seeing
Whether carry out subjective judgment whether gas leakage, both improve precision and also improved work efficiency, while reducing if examining water level and change
Cost of labor；
3rd, the whether gas leakage of water column instrument is first detected, can be avoided false retrieval being caused because of the gas leakage of water column instrument, be improve air-tightness
The accuracy of detection, and a water column instrument check it is air tight after can be used for multiple times determine other glass toughening manure pits it is airtight
Property, improve work efficiency；
4th, the air-leakage test of air pressure difference method is can be carried out using inflator pump or vacuum pump, and consumer can be with root
According to self-condition option and installment；
5th, by arranging alarm device, the situation of reviewer's product gas leakage can be reminded in time, is examined in real time
Test；
6th, the volume of water tank affects the water level in water column pipe, and volume is excessive, and operation inconvenience, volume are too small, in water column pipe
Water level is too low, and detection has that precision is poor；
7th, preset water level is set as into that 1000mm carries out air-leakage test, pressurize for the volume of glass toughening manure pit
Detection time is 300-1200s, it is allowed to which the first accumulative water level deviation judges which is air tight when being located at 0-20, for the gas of water column instrument
Close property detection, for water column instrument small volume, pressurize detection time is 200-600s, it is allowed to which the second accumulative water level deviation is located at 0-
Judge when 10 which is air tight, it is possible to reduce the time of all products air tightness detections, and high degree of automation, without the need for reviewer
Station is kept.
Description of the drawings
Fig. 1 is the inflator pump aeration schematic diagram of glass toughening manure pit air-leakage test of the present invention；
Fig. 2 is the vacuum pump degassing method schematic diagram of glass toughening manure pit air-leakage test of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to description text
Word can be implemented according to this.
As shown in figure 1, the present invention provides a kind of glass toughening manure pit air-tightness detection method, using inflator pump aeration,
The air-leakage test of glass toughening manure pit is carried out by air pressure difference method, only need to prepare simple water column instrument can complete air-tightness
Detection, it is simple to operate, it is pollution-free to product to be detected, comprise the following steps：
Step one, one end of water column pipe 112 with a scale is vertically fixed in the water tank 111 of closing composition water column instrument
110, using the connection glass toughening manure pit 160 of pipeline 130, inflator pump 140 and water column instrument 110, the water tank 111 and water column pipe
112 junctions seal, and 111 internal water flooding amount of water tank is the 1/3-2/3 of its volume, one end water tank of the water column pipe 112
Aqueous envelope in 111, the top of the water tank 111 are provided with air inlet, and which passes through the first sebific duct 131 and with the first air valve 151
Inflator pump 140 is connected, one end and atmosphere that the water column pipe 112 is not fixed with water tank 111,112 inwall of water column pipe
The level sensor 121 of connection digital display meter 122 is provided with, the digital display meter 122 connects a data acquisition unit 123, wherein, water level is passed
Sensor 121, digital display meter 122 and data acquisition unit 123 are combined into numerical control system 120, by the water level digitized of water column instrument, than
The accumulative water level deviation of the relative initial value of water column pipe water level in the time period maintained after water column pipe pressure is inflated compared with inflator pump
To judge glass toughening manure pit whether gas leakage, compare conventional whether change whether subjective judgment is carried out using manually observing water level
Gas leakage, had both improve precision and had also improved work efficiency, while reducing cost of labor；
One of them of step 2, hush panel of the employing with detection adapter 133 and fluid sealant closing glass toughening manure pit 160
Import, closes other imports of glass toughening manure pit using special-purpose sealing plate and fluid sealant, one end of the detection adapter 133 and
The inside connection of the glass toughening manure pit 160, the other end are connected with the first sebific duct 131 by the second sebific duct 132, the detection
The second air valve 152 is provided between the other end of adapter 133 and the second sebific duct 132；
Step 3, by air valve 150 control glass toughening manure pit 160, the gas between inflator pump 140 and water column instrument 110
Circulation, opens the first air valve 151, the second air valve 152 and inflator pump 140, treats the numerical value on the digital display meter 122 on water column instrument 100
When reaching the first preset water level value, the first air valve 151 and inflator pump 140 is closed, a number is gathered at interval of the first Preset Time
Water level value on aobvious table 122 is the first Real-time Water place value, and the first real time water level deviation is the first Real-time Water place value and described first
The absolute value of the difference of preset water level value, define the first accumulative water level deviation be in i the first Preset Time i first it is real
The meansigma methodss of Shi Shuiwei deviations, when the first accumulative water level deviation is located at 0 to predefined first boundary value, then judge
Glass toughening manure pit 160 is air tight, otherwise, then judges its gas leakage.
Described glass toughening manure pit air-tightness detection method, detected the airtight of water column instrument 110 before the step 3
Property, the first air valve 151 and inflator pump 140 is opened, the second air valve 152 is closed, the numerical value of the digital display meter 122 on water column instrument 110 is treated
When reaching the second preset water level value, the first air valve 151 and inflator pump 140 is closed, a number is gathered at interval of the second Preset Time
Water level value on aobvious table 122 is the second Real-time Water place value, and the second real time water level deviation is the second Real-time Water place value and described second
The absolute value of the difference of preset water level value, define the second accumulative water level deviation be in j the second Preset Time j second it is real
The meansigma methodss of Shi Shuiwei deviations, when the second accumulative water level deviation is located at 0 to predefined second boundary value, then judge
Water column instrument is air tight, into step 3, otherwise, then judges 110 gas leakage of water column instrument, changes water column instrument 110 to detection water column instrument 110
Step 3 is entered when air tight.The whether gas leakage of water column instrument is first detected, can be avoided false retrieval being caused because of the gas leakage of water column instrument, be improve
The accuracy of air-leakage test, and a water column instrument check it is air tight after can be used for multiple times measure other glass toughening manure pits
Air-tightness, improve work efficiency.
Described glass toughening manure pit air-tightness detection method, the digital display meter 122 are also associated with alarm device, its setting
For sending the first warning when the described first accumulative water level deviation is more than predefined first boundary value；When described second accumulative
Water level deviation sends the second warning when being more than predefined second boundary value.By arranging alarm device, inspection can be reminded in time
The situation of personnel's product gas leakage is tested, real-time inspection is carried out.
Described glass toughening manure pit air-tightness detection method, the volume of the water tank 111 is 6-9L.The volume shadow of water tank
Water level in Xiangshui County's column jecket, volume are excessive, and operation inconvenience, volume are too small, and in water column pipe, water level is too low, and it is poor that detection has precision
Problem.
Described glass toughening manure pit air-tightness detection method, the first preset water level value are 1000mm, and first presets
Time is 10-20s, and i is 30-60, and the first boundary value is 0-20mm.
Described glass toughening manure pit air-tightness detection method, the second preset water level value are 1000mm, and second presets
Time is 10-20s, and j is 20-30, and second boundary value is 0-10mm.
Preset water level is set as into that 1000mm carries out air-leakage test for the volume of glass toughening manure pit, when pressurize is detected
Between be 300-1200s, it is allowed to the first accumulative water level deviation judges which is air tight when being located at 0-20, for the air-tightness of water column instrument is examined
Survey, for water column instrument small volume, pressurize detection time is 200-600s, it is allowed to which the second accumulative water level deviation is sentenced when being located at 0-10
Breaking, which is air tight, it is possible to reduce the time of all products air tightness detections, and high degree of automation, keep without the need for reviewer station.
In general production, usually the pressurize detection time of water column instrument is 5min, or 4min or 8min, the guarantor of glass toughening manure pit
Pressure detection time is 10min, or 5min or 15min.During practical operation, according to the glass toughening manure pit of different volumes
Volume, reasonable selection pressurize detection time.When first boundary value control thinks that within 10mm the air-tightness of product is more excellent, more connect
Nearly 0 explanation air-tightness is better, when first boundary value is in 10-20, it is believed that the air-tightness of product is preferable, for water column instrument,
Second boundary value is controlled within 0-10mm.
As shown in Fig. 2 the present invention provides a kind of glass toughening manure pit air-tightness detection method, using vacuum pump degassing method,
The air-leakage test of glass toughening manure pit is carried out by air pressure difference method, only need to prepare simple water column instrument can complete air-tightness
Detection, it is simple to operate, it is pollution-free to product to be detected, comprise the following steps：
Step one, one end of water column pipe 212 with a scale is vertically fixed in the water tank 211 of closing composition water column instrument
210, using the connection glass toughening manure pit 260 of pipeline 230, vacuum pump 240 and water column instrument 210, the water tank 211 and water column pipe
212 junctions seal, and 211 internal water flooding amount of water tank is the 1/3-2/3 of its volume, one end water tank of the water column pipe 212
Aqueous envelope in 211, the other end of the water column pipe 212 is by the first sebific duct 231 and the vacuum pump 240 with the first air valve 251
Connection, 212 inwall of water column pipe are provided with the level sensor 221 of connection digital display meter 222, and the connection of the digital display meter 222 one is counted
According to harvester 223, wherein, level sensor 221, digital display meter 222 and data acquisition unit 223 are combined into numerical control system 220,
By the water level digitized of water column instrument, compare water column pipe water level in a time period after vacuum pump evacuation maintains water column pipe pressure
Judge glass toughening manure pit whether gas leakage with respect to the accumulative water level deviation of initial value, compare it is conventional using manually observing water level
Change carries out subjective judgment whether gas leakage, had both improve precision and has also improved work efficiency, at the same reduce it is artificial into
This；
One of them of step 2, hush panel of the employing with detection adapter 233 and fluid sealant closing glass toughening manure pit 260
Import, closes other imports of glass toughening manure pit using special-purpose sealing plate and fluid sealant, one end of the detection adapter 233 and
The inside connection of the glass toughening manure pit 260, the other end are connected with the first sebific duct 231 by the second sebific duct 232, the detection
The second air valve 252 is provided between the other end of adapter 233 and the second sebific duct 232；
Step 3, by air valve 250 control glass toughening manure pit 260, the gas between vacuum pump 240 and water column instrument 210
Circulation, opens the first air valve 251, the second air valve 252 and vacuum pump 240, treats the numerical value on the digital display meter 222 on water column instrument 210
When reaching the first preset water level value, the first air valve 251 and vacuum pump 240 is closed, a number is gathered at interval of the first Preset Time
Water level value on aobvious table 222 is the first Real-time Water place value, and the first real time water level deviation is the first Real-time Water place value and described first
The absolute value of the difference of preset water level value, define the first accumulative water level deviation be in i the first Preset Time i first it is real
The meansigma methodss of Shi Shuiwei deviations, when the first accumulative water level deviation is located at 0 to predefined first boundary value, then judge
Glass toughening manure pit 260 is air tight, otherwise, then judges its gas leakage.
Described glass toughening manure pit air-tightness detection method, detected the airtight of water column instrument 210 before the step 3
Property, the first air valve 251 and vacuum pump 240 is opened, the second air valve 252 is closed, the numerical value of the digital display meter 222 on water column instrument 210 is treated
When reaching the second preset water level value, the first air valve 251 and vacuum pump 240 is closed, a number is gathered at interval of the second Preset Time
Water level value on aobvious table 222 is the second Real-time Water place value, and the second real time water level deviation is the second Real-time Water place value and described second
The absolute value of the difference of preset water level value, define the second accumulative water level deviation be in j the second Preset Time j second it is real
The meansigma methodss of Shi Shuiwei deviations, when the second accumulative water level deviation is located at 0 to predefined second boundary value, then judge
Water column instrument is air tight, into step 3, otherwise, then judges 210 gas leakage of water column instrument, changes water column instrument 210 to detection water column instrument 210
Step 3 is entered when air tight.The whether gas leakage of water column instrument is first detected, can be avoided false retrieval being caused because of the gas leakage of water column instrument, be improve
The accuracy of air-leakage test, and a water column instrument check it is air tight after can be used for multiple times measure other glass toughening manure pits
Air-tightness, improve work efficiency.
Described glass toughening manure pit air-tightness detection method, the digital display meter 222 are also associated with alarm device, its setting
For sending the first warning when the described first accumulative water level deviation is more than predefined first boundary value；When described second accumulative
Water level deviation sends the second warning when being more than predefined second boundary value.By arranging alarm device, inspection can be reminded in time
The situation of personnel's product gas leakage is tested, real-time inspection is carried out.
Described glass toughening manure pit air-tightness detection method, the volume of the water tank 211 is 6-9L.The volume shadow of water tank
Water level in Xiangshui County's column jecket, volume are excessive, and operation inconvenience, volume are too small, and in water column pipe, water level is too low, and it is poor that detection has precision
Problem.
Described glass toughening manure pit air-tightness detection method, the first preset water level value are 1000mm, and first presets
Time is 10-20s, and i is 30-60, and the first boundary value is 0-20mm.
Described glass toughening manure pit air-tightness detection method, the second preset water level value are 1000mm, and second presets
Time is 10-20s, and j is 20-30, and second boundary value is 0-10mm.
Preset water level is set as into that 1000mm carries out air-leakage test for the volume of glass toughening manure pit, when pressurize is detected
Between be 300-1200s, it is allowed to the first accumulative water level deviation judges which is air tight when being located at 0-20, for the air-tightness of water column instrument is examined
Survey, for water column instrument small volume, pressurize detection time is 200-600s, it is allowed to which the second accumulative water level deviation is sentenced when being located at 0-10
Breaking, which is air tight, it is possible to reduce the time of all products air tightness detections, and high degree of automation, keep without the need for reviewer station.
In general production, usually the pressurize detection time of water column instrument is 5min, or 4min or 8min, the guarantor of glass toughening manure pit
Pressure detection time is 10min, or 5min or 15min.During practical operation, according to the glass toughening manure pit of different volumes
Volume, reasonable selection pressurize detection time.When first boundary value control thinks that within 10mm the air-tightness of product is more excellent, more connect
Nearly 0 explanation air-tightness is better, when first boundary value is in 10-20, it is believed that the air-tightness of product is preferable, for water column instrument,
Second boundary value is controlled within 0-10mm.
In scheme disclosed by the invention, connecting pipe and valve are considered gastight.
Although embodiment of the present invention is disclosed as above, which is not restricted to listed by description and embodiment
With, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easily
Other modification is realized, therefore under the general concept limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (7)
1. a kind of glass toughening manure pit air-tightness detection method, it is characterised in that comprise the following steps：
Step one, one end of water column pipe with a scale is vertically fixed in the water tank of closing composition water column instrument, the water tank with
Water column pipe junction seals, and water tank internal water flooding amount is the 1/3-2/3 of its volume, in one end water tank of the water column pipe
Aqueous are sealed, and water column instrument is connected with the air pump with the first air valve by the first sebific duct, and the water column inside pipe wall is provided with connection digital display meter
Level sensor, the digital display meter connects a data acquisition unit；
Step 2, the one of import for being closed glass toughening manure pit using the hush panel with detection adapter and fluid sealant, are adopted
Special-purpose sealing plate and fluid sealant close other imports of glass toughening manure pit, one end of the detection adapter and the glass tempering
The inside connection of manure pit, the other end are connected with the first sebific duct by the second sebific duct, the other end and the second glue of the detection adapter
The second air valve is provided between pipe；
Step 3, the first air valve of opening, the second air valve and air pump, treat that the numerical value on the digital display meter on water column instrument reaches first and presets
During water level value, the first air valve and air pump is closed, it is first to gather the water level value on a digital display meter at interval of the first Preset Time
Real-time Water place value, the first real time water level deviation are that the first Real-time Water place value is absolute with the difference of the first preset water level value
Value, defines the meansigma methodss that the first accumulative water level deviation is i the first real time water level deviation in i the first Preset Time, when
When first accumulative water level deviation is located at 0 to predefined first boundary value, then judge that glass toughening manure pit is air tight, it is no
Then, then judge its gas leakage；
The air-tightness of water column instrument is detected before the step 3, the first air valve and air pump is opened, and is closed the second air valve, is treated water column
When the numerical value of the digital display meter on instrument reaches the second preset water level value, the first air valve and air pump is closed, at interval of the second Preset Time
Water level value on digital display meter of collection is the second Real-time Water place value, and the second real time water level deviation is the second Real-time Water place value and institute
The absolute value of the difference of the second preset water level value is stated, it is j in j the second Preset Time to define the second accumulative water level deviation
The meansigma methodss of the second real time water level deviation, when the second accumulative water level deviation is located at 0 to predefined second boundary value,
Then judge that water column instrument is air tight, into step 3, otherwise, then judge water column instrument gas leakage, change water column instrument and extremely detect water column instrument not
Step 3 is entered during gas leakage.
2. glass toughening manure pit air-tightness detection method as claimed in claim 1, it is characterised in that the air pump is inflation
Pump, is provided with air inlet at the top of the water tank, the inflator pump is connected with the air inlet by the first sebific duct, the water column pipe
The one end do not fixed with water tank and atmosphere.
3. glass toughening manure pit air-tightness detection method as claimed in claim 1, it is characterised in that the air pump is vacuum
Pump, the vacuum pump are connected with the other end of the water column pipe by the first sebific duct.
4. the glass toughening manure pit air-tightness detection method as described in arbitrary in Claims 2 or 3, it is characterised in that the number
Aobvious table is also associated with alarm device, and which is set to, when the described first accumulative water level deviation is more than predefined first boundary value
Send the first warning；The second warning is sent when the described second accumulative water level deviation is more than predefined second boundary value.
5. glass toughening manure pit air-tightness detection method as claimed in claim 4, it is characterised in that the volume of the water tank is
6-9L。
6. glass toughening manure pit air-tightness detection method as claimed in claim 5, it is characterised in that first preset water level
It is worth for 1000mm, the first Preset Time is 10-20s, and i is 30-60, the first boundary value is 0-20mm.
7. glass toughening manure pit air-tightness detection method as claimed in claim 6, it is characterised in that second preset water level
It is worth for 1000mm, the second Preset Time is 10-20s, and j is 20-30, second boundary value is 0-10mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510159255.7A CN104819812B (en) | 2015-04-03 | 2015-04-03 | Glass fiber reinforced plastic septic tank airtightness detection method |
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|---|---|---|---|
| CN201510159255.7A CN104819812B (en) | 2015-04-03 | 2015-04-03 | Glass fiber reinforced plastic septic tank airtightness detection method |
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| CN104819812B true CN104819812B (en) | 2017-03-22 |
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| CN109211495A (en) * | 2018-10-26 | 2019-01-15 | 苏州岸肯电子科技有限公司 | A kind of silencer leak-testing apparatus |
| CN114608768B (en) * | 2022-03-11 | 2023-05-30 | 深圳潜行创新科技有限公司 | Small underwater equipment cabin tightness detection method |
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|---|---|---|---|---|
| CN2872339Y (en) * | 2006-02-23 | 2007-02-21 | 吴至一 | Air-tightness tester |
| CN101446512A (en) * | 2008-09-26 | 2009-06-03 | 上汽通用五菱汽车股份有限公司 | Automotive fuel leak detection method |
| CN103868663A (en) * | 2014-03-06 | 2014-06-18 | 农业部沼气科学研究所 | Glass fiber reinforced plastics methane tank arch detection device and detection method |
| CN104483079A (en) * | 2014-11-29 | 2015-04-01 | 农业部沼气科学研究所 | Biogas tank airtightness testing device |
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| US7788967B2 (en) * | 2007-05-02 | 2010-09-07 | Praxair Technology, Inc. | Method and apparatus for leak detection |
| US7856965B2 (en) * | 2007-11-27 | 2010-12-28 | Continental Automotive Canada | Natural vacuum leak detection device using diaphragm-seal mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2872339Y (en) * | 2006-02-23 | 2007-02-21 | 吴至一 | Air-tightness tester |
| CN101446512A (en) * | 2008-09-26 | 2009-06-03 | 上汽通用五菱汽车股份有限公司 | Automotive fuel leak detection method |
| CN103868663A (en) * | 2014-03-06 | 2014-06-18 | 农业部沼气科学研究所 | Glass fiber reinforced plastics methane tank arch detection device and detection method |
| CN104483079A (en) * | 2014-11-29 | 2015-04-01 | 农业部沼气科学研究所 | Biogas tank airtightness testing device |
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