CN208621269U - Low pressure leakage detection apparatus - Google Patents
Low pressure leakage detection apparatus Download PDFInfo
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- CN208621269U CN208621269U CN201821153174.1U CN201821153174U CN208621269U CN 208621269 U CN208621269 U CN 208621269U CN 201821153174 U CN201821153174 U CN 201821153174U CN 208621269 U CN208621269 U CN 208621269U
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Abstract
The utility model discloses a kind of low pressure leakage detection apparatus, belong to air pressure leak hunting technology field, solve the problems, such as that the gaseous mass filled at this stage into closed container is poor.Its key points of the technical solution are that a kind of low pressure leakage detection apparatus, including detection end, comprising: the air inlet of filter, the filter is communicated with the atmosphere, and the gas outlet of the filter is connected to detection end；First check valve and second one-way valve, first check valve and second one-way valve are sequentially connected in series between filter and detection end, and only air are allowed to be connected from filter to detection end direction；Extraction pneumatic module, the extraction pneumatic module is simultaneously set between the first check valve and second one-way valve, and by atmosphere by after filter and being transported to detection end, the low pressure leakage detection apparatus be filled with closed container for leak detection gas it is cleaner, the inner cavity of closed container not easy to pollute.
Description
Technical field
The utility model belongs to air pressure leak hunting technology field, more particularly to a kind of low pressure leakage detection apparatus.
Background technique
The leak detection of closed container, which is generallyd use, is filled with gas into sealing container, so that the air pressure in closed container increases,
And the pressure transmitter by being interconnected with closed container inner cavity detects the air-tightness of closed container.At this stage, factory is general
It is all made of air pump or air accumulator and air is filled into closed container by a solenoid valve, to detect the airtight of closed container
Property.But pass through the second-rate of the air that air pump and air accumulator are filled into closed container, it is easy the interior of pollution closed container
Chamber.
Utility model content
The purpose of the utility model is to provide a kind of low pressure leakage detection apparatus, the low pressure leakage detection apparatus is filled with closed container use
It is cleaner in the gas of leak detection, the inner cavity of closed container not easy to pollute.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of low pressure leakage detection apparatus, including detection end, comprising: filter, the air inlet and atmosphere of the filter connect
Logical, the gas outlet of the filter is connected to detection end；First check valve and second one-way valve, first check valve and
Two check valves are sequentially connected in series between filter and detection end, and only air are allowed to lead from filter to detection end direction
It is logical；Extraction pneumatic module, the extraction pneumatic module is simultaneously set between the first check valve and second one-way valve, and atmosphere is passed through filtering
After device and it is transported to detection end.
By using above-mentioned technical proposal, the principle of above-mentioned low pressure leakage detection apparatus is as follows: firstly, detection end and close
It closes container to be connected, realizes the connection of low pressure leakage detection apparatus；Later, the air in atmosphere is passed sequentially through filtering by extraction pneumatic module
After device and the first check valve, transition storage is carried out；Then, this partial air is passed through second one-way valve and detection by extraction pneumatic module
End is passed through in closed container, is increased the air pressure in closed container, is realized the purpose of leak detection.
More traditional fills using for the leakage detection apparatus of air pump or air accumulator, low pressure disclosed by the utility model is hunted leak
Set, only transported the air in atmosphere, and the air in atmosphere is by after filter, only by the first check valve,
Extraction pneumatic module, second one-way valve and detection end, just enter in closed container to be checked, ensure that and enter closed container
Interior air is clean, it is therefore prevented that search gas pollutes closed container inner cavity.
Meanwhile compared to air accumulator/air pump and detection end between install filter mode for, due to air accumulator
Contain a large amount of impurity and steam in the gas of air pump output, although filter can filter this partial impurities and steam,
But causing the filter pressure of filter larger, the replacement frequency of filter inner filter core is excessively high；And the filtering in the utility model
Directly and atmosphere, and low pressure leakage detection apparatus is typically mounted in dust-free workshop device, so that the filter pressure of filter is smaller,
The replacement frequency of filter inner filter core is smaller, reduces the daily maintenance expense of entire low pressure leakage detection apparatus.
The extraction pneumatic module includes: detection cylinder, the inspection of the detection cylinder as a further improvement of the utility model,
The inner cavity that survey piston will test cylinder is separated into extraction chamber and driving chamber, and the extraction chamber accesses the first check valve and second unidirectionally
Between valve；Vacuum elements, the vacuum elements can drive detection piston to slide towards driving chamber；Deflation component, the deflation
Component can drive detection piston to slide towards extraction chamber.
By using above-mentioned technical proposal, the mode for detecting cylinder collocation vacuum elements and deflation component realizes extraction gas
The basic function of component.
The principle of above-mentioned extraction pneumatic module is as follows: vacuum elements driving detection piston slides towards driving chamber, so that
The volume of extraction chamber increases, after realizing the air in atmosphere through filter and the first check valve, enter extraction it is intracavitary (by
In the setting of second one-way valve, only allow the air entrance in atmosphere), realize pumping action；Deflation component can drive detection
Piston slides towards extraction chamber, so that the volume of extraction chamber is reduced, the intracavitary air of extraction passes through second one-way valve and test side
It after head, enters in closed container to be checked, realizes the detection to closed container (due to the setting of the first check valve, extraction chamber
The gas of output is merely able to pass through second one-way valve).
Since the leakproofness of the detection piston between the driving chamber and extraction chamber of detection cylinder is ideal, so that entire extraction gas
The operation stability of component is ideal, and the accuracy of leak detection is higher；And since the cleanliness of detection cylinder can reach food
Grade, can guarantee the cleanliness in the gas of the intracavitary storage of extraction.
The detection piston of the detection cylinder includes: detection piston head as a further improvement of the utility model,；Detection
Piston rod, the detection piston rod are set to detection piston head towards the end face of driving chamber and stretch out outside detection cylinder；The pumping
Pneumatic module includes: connector, the connector be installed on detection piston rod and be located at detection cylinder on the outside of, the connector it is upper
End setting restraining position ring block；Reset spring, the reset spring be sheathed on detection piston rod on, and simultaneously with detection cylinder shell and
Stop collar abuts.
By using above-mentioned technical proposal, the basic function of vacuum elements is that driving detection piston slides towards driving chamber,
And the structure arrangement of above-mentioned detection piston can be realized in conjunction with the cooperation of reset spring and connector and will test piston towards drive
Dynamic chamber is slid.And the structure of above-mentioned vacuum elements is simple, operational reliability is higher, and manufacturing cost and installation cost are handed over
Bottom.
It as a further improvement of the utility model, further include inflation quantity regulating device, the inflation quantity regulating device packet
Include: the bottom of detection pedestal, the detection cylinder is mounted on detection pedestal；Top plate, the lower end of the top plate and detection piston
The upper end of bar is abutted against to limit the stroke of detection piston；Cylinder is adjusted, which is installed on detection pedestal and adjusts gas
The regulating piston bar of cylinder is supported in the bottom of top plate.
By using above-mentioned technical proposal, the working principle for inflating quantity regulating device is as follows: adjusting cylinder can adjust
It saves top plate and detects the gap size between pedestal, the stroke size for detecting piston in detection cylinder can be adjusted, that is, adjusted
The size towards aeration quantity in closed container to be checked of entire low pressure leakage detection apparatus.The setting of above structure enables to low pressure to examine
The aeration quantity that leakage device can be adapted to according to the big minor adjustment of different closed containers to be checked, is promoted and entirely compresses leakage detection apparatus
Application range.
Extension rod is additionally provided at the top of the detection piston rod of the detection cylinder as a further improvement of the utility model,
And it is installed on the buffer stopper to offset at the top of extension rod and with top plate.
By using above-mentioned technical proposal, the direct conflict that will test piston rod and top plate has been substituted for buffer stopper and top plate
Conflict, can reduce top plate and detect piston rod between impact wear, thus extend top plate and detect piston rod use
Service life.
Under the premise of guaranteeing that inflation quantity regulating device can operate normally, extension rod can increase detection pedestal and top plate
Between height, facilitate staff and the operation conditions of low pressure leakage detection apparatus be observed, also facilitate staff to low
Press the periodic maintenance of leakage detection apparatus.
The deflation component includes: gas source as a further improvement of the utility model, which is connected with driving chamber
And it is supplied for driving chamber；Solenoid valve, the solenoid valve allow hand over driving chamber and are connected to atmosphere/driving chamber with gas source.
By using above-mentioned technical proposal, the basic function of deflation component is that driving detection piston slides towards extraction chamber,
And the structure arrangement of above-mentioned detection piston, in conjunction with gas source and solenoid valve, under pumping state, driving chamber and atmosphere are helped
It is excluded in by the gas in driving chamber, reduces the operation burden of vacuum elements；In the deflated condition, driving chamber is connected to gas source,
Gas source promotes the air pressure in driving chamber, and will test piston and push extraction chamber to.Above-mentioned deflation modular construction is simple, easy for installation,
Reliability of operation is higher.
As a further improvement of the utility model, between detection end and the second one-way valve and equipped with for measuring
Detect the pressure transmitter of air pressure.
By using above-mentioned technical proposal, pressure transmitter is able to detect the gas between detection end and second one-way valve
Pressure, it can the atmospheric pressure value in detection closed container, to judge whether closed container to be checked has leakage problem.
In conclusion the utility model discloses a kind of low pressure leakage detection apparatus, by being sequentially arranged filter, first unidirectionally
Valve, second one-way valve, detection end and and be set to extraction pneumatic module between the first check valve and second one-way valve, realize
Air in atmosphere is transported to the purpose hunted leak detection end point into after filtering, and the setting of above structure is so that defeated
The cleaning gas degree entered in closed container to be checked is higher, weakens the pollution caused by closed container in the detection process.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that leakage detection apparatus is compressed in the utility model；
Fig. 2 is the enlarged drawing in Fig. 1 at A；
Fig. 3 is the enlarged drawing in Fig. 1 at B；
Fig. 4 is the diagrammatic cross-section that end is detected in the utility model；
Fig. 5 is the diagrammatic cross-section of extraction pneumatic module in the utility model.
In figure: 110, filter；120, the first check valve；130, second one-way valve；140, the first three-way connection；150,
Two three-way connections；200, end is detected；210, detection bar；211, sense channel；220, gasket；230, mold is detected；231,
Resilient clamp member；300, pressure transmitter；400, quantity regulating device is inflated；410, pedestal is detected；420, top plate；430, gas is adjusted
Cylinder；500, extraction pneumatic module；510, cylinder is detected；511, piston is detected；511a, detection piston head；511b, detection piston rod；
512, extraction chamber；513, driving chamber；521, connector；522, reset spring；532, solenoid valve；540, extension rod；550, it buffers
Block.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Refering to attached drawing 1 and attached drawing 2, a kind of low pressure leakage detection apparatus, including detection pedestal 410, detection end 200, filter
110, the first check valve 120, second one-way valve 130 and extraction pneumatic module 500.Wherein, filter 110, the first check valve
120, second one-way valve 130 and detection end 200 are sequentially communicated, and 130 permissions of the first check valve 120 and second one-way valve are empty
Gas is connected from filter 110 to detection 200 direction of end, and extraction pneumatic module 500 is simultaneously unidirectional set on the first check valve 120 and second
Between valve 130.
Refering to attached drawing 1 and attached drawing 4, detects end 200 and include the detection bar 210 for running through detection 410 top and bottom of pedestal, be arranged
In the gasket 220 being affixed in detection bar 210 and with detection 410 bottom surface of pedestal and the detection mould being installed in detection bar 210
Tool 230.Wherein, enter the sense channel 211 of closed container in detection bar 210 with supplied gas.Wherein, 230 sets of mold are detected
It is located in detection bar 210, and detection mold is provided with and is connected to resilient clamp member 231 in detection bar 210.
Refering to attached drawing 1, attached drawing 2 and attached drawing 3, the upper end of detection bar 210 is equipped with the first three-way connection 140, the first threeway
One end of connector 140 is equipped with one for measuring the pressure transmitter 300 of detection air pressure, and the first three-way connection 140 is another
One end is connected to second one-way valve 130.
Second three-way connection 150, the second threeway are additionally provided between first check valve 120 and second one-way valve 130
A remaining connector for connector 150 is connected with extraction pneumatic module 500.
Refering to attached drawing 1 and attached drawing 5, extraction pneumatic module 500 includes detection cylinder 510, vacuum elements and deflation component.Detection
The bottom of cylinder 510 is mounted on the top of detection pedestal 410.Detection piston 511 in detection cylinder 510 will test cylinder 510
Inner cavity be separated into extraction chamber 512 and driving chamber 513, and detecting piston 511 includes detection piston head 511a and detection piston rod
511b, detection piston rod 511b are set to detection piston head 511a towards the end face of driving chamber 513 and stretch out detection cylinder 510
Outside.Wherein, the extraction chamber 512 and the remaining fittings of the second three-way connection 150 in cylinder 510 are detected.
Deflation component includes gas source (not shown) and solenoid valve 532.Wherein, gas source and driving chamber 513 are interconnected,
And it can be supplied for driving chamber 513.Solenoid valve 532 is two-position three way magnetic valve 532, whether gentle allows hand over driving chamber 513
Source connection, when driving chamber 513 is not connected to gas source, driving chamber 513 and atmosphere are interconnected.In the present embodiment, gas source is
Storage cylinder.
Vacuum elements can drive detection piston 511 to slide towards driving chamber 513, including be installed on detection piston rod 511b
Connector 521 that is upper and being located at 510 outside of detection cylinder, the reset spring 522 being sheathed on detection piston rod 511b, connector
521 upper end has a stop collar of limitation reset spring 522 upper end level, i.e., reset spring 522 simultaneously with detection cylinder 510
The stop collar of shell and connector 521 offsets.
It detects to be additionally provided with extension rod 540 at the top of the detection piston rod 511b of cylinder 510 and be installed on extension rod 540 and push up
The buffer stopper 550 in portion.
Above-mentioned low pressure leakage detection apparatus is additionally provided with an inflation quantity regulating device 400, including above-mentioned detection pedestal 410,
Top plate 420 and adjusting cylinder 430.Wherein, the buffer stopper 550 of the lower end of top plate 420 and detection cylinder 510 offsets to limit detection
The stroke of piston 511.The bottom that cylinder 430 is mounted on detection pedestal 410 is adjusted, and the regulating piston bar for adjusting cylinder 430 is straight
It connects through detection pedestal 410 and is connected and fixed with top plate 420.By adjusting the flexible of cylinder 430, adjustable top plate 420
Highly, that is, the stroke of detection piston 511 in entire detection cylinder 510 is had adjusted.
The above-mentioned leak detection for compressing leakage detection apparatus is shown in steps are as follows: 1, closed container to be checked being mounted on detection end
On 200, and compress sealing；2, solenoid valve 532 acts, so that driving chamber 513 is connected to gas source, under the action of pressure difference, inspection
It surveys piston 511 to slide towards extraction chamber 512, the air in extraction chamber 512 is to be checked close by entering after second one-way valve 130
It closes in container；3, detection is completed, and solenoid valve 532 acts, so that driving chamber 513 and atmosphere, in the effect of reset spring 522
Under, detection piston 511 slides towards driving chamber 513, and the air in atmosphere is laggard by filter 110 and the first check valve 120
Enter into extraction chamber 512.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (7)
1. a kind of low pressure leakage detection apparatus, including detection end (200) characterized by comprising
The air inlet of filter (110), the filter (110) is communicated with the atmosphere, the gas outlet of the filter (110) and inspection
Survey end (200) connection；
First check valve (120) and second one-way valve (130), first check valve (120) and second one-way valve (130) are successively
It is connected between filter (110) and detection end (200), and only allows air from filter (110) to detection end (200)
Direction conducting；
Extraction pneumatic module (500), the extraction pneumatic module (500) are simultaneously set to the first check valve (120) and second one-way valve (130)
Between, and atmosphere is passed through into filter (110) afterwards and is transported to detection end (200).
2. a kind of low pressure leakage detection apparatus according to claim 1, which is characterized in that the extraction pneumatic module (500) includes:
It detects cylinder (510), the inner cavity that the detection piston (511) of the detection cylinder (510) will test cylinder (510) is separated into pumping
Put chamber (512) and driving chamber (513), extraction chamber (512) access the first check valve (120) and second one-way valve (130) it
Between；
Vacuum elements, the vacuum elements (520) can drive detection piston (511) to slide towards driving chamber (513)；
Deflation component, the deflation component can drive detection piston (511) to slide towards extraction chamber (512).
3. a kind of low pressure leakage detection apparatus according to claim 2, which is characterized in that the detection of detection cylinder (510)
Piston (511) includes:
It detects piston head (511a)；
It detects piston rod (511b), the detection piston rod (511b) is set to detection piston head (511a) towards driving chamber
(513) cylinder (510) are detected outside in end face and stretching；
The vacuum elements include:
Connector (521), the connector (521) are installed on detection piston rod (511b) and are located on the outside of detection cylinder (510),
Restraining position ring block is arranged in the upper end of the connector (521)；
Reset spring (522), the reset spring (522) be sheathed on detection piston rod (511b) on, and simultaneously with detection cylinder
(510) shell and stop collar abut.
4. a kind of low pressure leakage detection apparatus according to claim 3, which is characterized in that further include inflation quantity regulating device
(400), the inflation quantity regulating device (400) includes:
It detects pedestal (410), the bottom of detection cylinder (510) is mounted in detection pedestal (410)；
Top plate (420), the lower end of the top plate (420) and the upper end of detection piston rod (511b) are abutted against to limit detection piston
(511) stroke；
It adjusts cylinder (430), which is installed on detection pedestal (410) and adjusts the regulating piston of cylinder (430)
Bar is supported in the bottom of top plate (420).
5. a kind of low pressure leakage detection apparatus according to claim 4, which is characterized in that the detection of detection cylinder (510)
It is additionally provided with extension rod (540) at the top of piston rod (511b) and is installed at the top of extension rod (540) and offsets with top plate (420)
Buffer stopper (550).
6. a kind of low pressure leakage detection apparatus according to claim 2, which is characterized in that the deflation component includes:
Gas source, the gas source are connected with driving chamber (513) and supply for driving chamber (513)；
Solenoid valve (532), the solenoid valve (532) allows hand over driving chamber (513) and atmosphere/driving chamber (513) is gentle
Source connection.
7. a kind of low pressure leakage detection apparatus according to claim 1, which is characterized in that the detection end (200) and second
Between check valve (130) and it is equipped with the pressure transmitter (300) for measuring detection air pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821153174.1U CN208621269U (en) | 2018-07-19 | 2018-07-19 | Low pressure leakage detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821153174.1U CN208621269U (en) | 2018-07-19 | 2018-07-19 | Low pressure leakage detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208621269U true CN208621269U (en) | 2019-03-19 |
Family
ID=65706485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821153174.1U Active CN208621269U (en) | 2018-07-19 | 2018-07-19 | Low pressure leakage detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208621269U (en) |
-
2018
- 2018-07-19 CN CN201821153174.1U patent/CN208621269U/en active Active
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