CN109253848A - A kind of device for detecting sealability and its detection method - Google Patents
A kind of device for detecting sealability and its detection method Download PDFInfo
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- CN109253848A CN109253848A CN201811397460.7A CN201811397460A CN109253848A CN 109253848 A CN109253848 A CN 109253848A CN 201811397460 A CN201811397460 A CN 201811397460A CN 109253848 A CN109253848 A CN 109253848A
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- 238000001514 detection method Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 claims description 6
- 206010008469 Chest discomfort Diseases 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
Abstract
The invention discloses a kind of device for detecting sealability and its detection methods, wherein detection device includes cabinet, cabinet is equipped with first chamber and second chamber, cabinet is additionally provided with control device, main line and two bye-passes, main line is equipped with high/low pressure cut-over valve, shuttle valve and reversal valve for connecting with gas source, along airflow direction；The input terminal connection of two bye-passes, each bye-pass is equipped with vacuum control valve and vacuum generator, vacuum reversal valve, vacuum on-off valve and pressure detection switch along airflow direction, the output end of two bye-passes is connected to first chamber and second chamber respectively, and two output ends of reversal valve are connect with another input terminal of two vacuum reversal valves respectively；Control device includes PLC controller, touch screen, multiple indicator lights and multiple switch.The present invention, using compressed air as power, air pressure range is wide；It is applicable in single-chamber, the sealing propertytest of two-chamber and cavity leakage simultaneously；Using the above vacuum generator of second level, specific air consumption is low, saves the energy.
Description
Technical field
The present invention relates to sealing detection technical fields, and in particular to a kind of device for detecting sealability and its detection method.
Background technique
Sealing test instrument is called air-leakage detector or leakage property tester, is primarily adapted for use in food, pharmacy, Medical treatment device
The sealing of packaging bag, bottle, pipe, tank, the box of the industries such as tool, daily use chemicals, automobile, electronic component, stationery, consumer electronics etc. tries
It tests.
Existing device for detecting sealability generallys use detector in water, positive pressure detector and the detection of artisan soap silk.In water
Detection, gas leakage have a bubble, feature be it is intuitive effectively, handle not clean the disadvantage is that detected product is water stain after having surveyed, easily cause to produce
Product get rusty；Positive pressure detection, in the case of micro- leakage, detection accuracy is low；The detection of artisan soap silk, manual operation factor easily cause to examine
Result uncertainty is surveyed to greatly increase.
In view of this, being badly in need of improving the structure of existing sealing test instrument, to facilitate operation detection effect is improved
Fruit reduces specific air consumption.
Summary of the invention
The technical problem to be solved by the present invention is to there are the specific air consumptions big, detections of the structure of existing sealing test instrument
The low problem of effect accuracy.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that providing a kind of includes cabinet, the case
Body is equipped with first chamber and second chamber, and the cabinet is additionally provided with:
Main line is equipped with pressure charging valve, high/low pressure cut-over valve, shuttle valve and reversal valve along airflow direction for connecting with gas source；
Two bye-passes, the input terminal connection of two bye-passes, each bye-pass are equipped with vacuum along airflow direction
Control valve and vacuum generator, vacuum reversal valve, vacuum on-off valve and pressure detection switch, the output end of two bye-passes
Respectively with two chambers, the vacuum reversal valve set there are two input terminal, two vacuum generators respectively with
One input terminal of the reversal valve connects, and two output ends of the reversal valve are another with two vacuum reversal valves respectively
One input terminal connection；
Control device, including PLC controller, touch screen, multiple indicator lights and multiple switch, the pressure charging valve, high-low pressure
Switching valve, shuttle valve, reversal valve, vacuum control valve, vacuum generator, vacuum reversal valve, vacuum on-off valve and pressure detection switch
It is connect respectively with the PLC controller.
In another preferred embodiment, the input terminal of two bye-passes passes through pressure-regulating valve and the height
The input terminal of low pressure switching valve is connected to.
In another preferred embodiment, one end of the high-voltage output end of the high/low pressure cut-over valve and the shuttle valve connects
It connects, low-voltage output is connect by low pressure modulating valve with the other end of the shuttle valve.
In another preferred embodiment, gas source filter is additionally provided on the input port of the main line.
In another preferred embodiment, the cabinet is equipped with gas source inlet, the gas source inlet and the supervisor
Road connection, is respectively equipped with air inlet in the first chamber and second chamber, the output end of each bye-pass and corresponding institute
State air inlet connection.
In another preferred embodiment, pressure retaining valve and negative pressure are equipped in the first chamber and the second chamber
Control valve.
In another preferred embodiment, the indicator light includes unqualified indicator light and qualified indicator light.
In another preferred embodiment, the switch includes power switch, protective switch, starts switch, stops opening
Pass and emergency stop switch.
The present invention also provides a kind of detection methods carried out using above-mentioned device for detecting sealability, including walk as follows
It is rapid:
The high pressure detection of S10, the first/bis- chamber:
S11, pressure charging valve is adjusted, air-flow is made to form high pressure draught by pressure charging valve, it is defeated by the high pressure of high/low pressure cut-over valve
Outlet, shuttle valve, reversal valve reach the using vacuum reversal valve, the vacuum on-off valve on the corresponding bye-pass of the second/mono- chamber
Two/mono- chambers；
Vacuum control valve on S12, another bye-pass obtains electric opening, and vacuum generator starting generates high vacuum, reaches
First chamber；
S13, vacuum on-off valve, the vacuum on-off valve on two bye-passes must be electrically activated, first chamber, second chamber and
Exterior line cutting, is respectively formed closed vacuum chamber, high pressure chest；
S14, high-precision pressure detection switch detect the vacuum degree of the first/bis- chamber, are shown by indicator light qualified or not；
S15, the first/bis- chamber complete detection process, all valve power-off；
The low pressure detection of S20, the first/bis- chamber:
S21, high/low pressure cut-over valve starting, switch to low-voltage output, and pressure is lowered to low-pressure settings, form low pressure gas
Stream, by low pressure modulating valve, shuttle valve, reversal valve, other steps are identical as the high pressure detecting step of S10.
Compared with prior art, of the invention, using compressed air as power, have the advantage that
1. detecting the sealing performance of closed chamber using high pressure and low pressure two ways, high pressure can up to 4.0MPa, low pressure
To 0.1MPa, air pressure range is wide, is suitable for a variety of sealing propertytests；
2. being applicable in single-chamber detection, the leakproofness of two-chamber detection and cavity leakage simultaneously；
3. reachable-the 91Kpa of vacuum degree, high vacuum is occurred to ensure the accuracy detected using the above vacuum of second level
Device, specific air consumption save 50% than single stage vacuum, and complete machine power only has 50W, saves the energy.
Detailed description of the invention
Fig. 1 is the perspective view in the present invention；
Fig. 2 be Fig. 1 in A to structural schematic diagram；
Fig. 3 be Fig. 1 in B to structural schematic diagram；
Fig. 4 be Fig. 1 in C to structural schematic diagram；
Fig. 5 be Fig. 1 in D to structural schematic diagram；
Fig. 6 is the working principle of the invention figure.
Specific embodiment
The present invention provides a kind of device for detecting sealability and its detection methods, can be suitable for the close of a variety of pressure limits
The detection of envelope property, while it being applicable in single-chamber detection, the leakproofness of two-chamber detection and cavity leakage, specific air consumption is low, saves the energy.Under
Face combines specification drawings and specific embodiments to be described in detail the present invention.
As shown in figs. 1,2 and 6, a kind of device for detecting sealability provided by the invention, including cabinet, cabinet are equipped with the
One chamber and second chamber, cabinet are additionally provided with main line, two bye-passes and control device.
Main line is equipped with pressure charging valve 41, high/low pressure cut-over valve 22, shuttle valve 48 along airflow direction and changes for connecting with gas source
To valve 47.Pressure charging valve 41 is used to increase to the air pressure of gas source the preset range of high pressure.High/low pressure cut-over valve 22 is used in high pressure
It is switched between low pressure.Reversal valve 47 between two bye-passes for switching over the flow direction of air-flow.
The input terminal connection of two bye-passes, each bye-pass are equipped with vacuum control valve 18, vacuum generator along airflow direction
14, vacuum reversal valve 44, vacuum on-off valve 45 and pressure detection switch 46, the output end of two bye-passes respectively with first chamber
Be connected to second chamber, vacuum reversal valve 44 is set there are two input terminal, two vacuum generators 14 respectively with reversal valve 47 one
A input terminal connection, two output ends of reversal valve 47 are connect with another input terminal of two vacuum reversal valves 44 respectively.
Control device includes PLC controller 30, touch screen 1, multiple indicator lights and multiple switch, pressure charging valve 41, high-low pressure
Switching valve 22, shuttle valve 48, reversal valve 47, vacuum control valve 18, vacuum generator 14, vacuum reversal valve 44, vacuum on-off valve 45
It is connect respectively with PLC controller 30 with pressure detection switch 46.The air pressure and first chamber and of gas source can be shown on touch screen 1
The air pressure of two chambers.
Wherein, the input terminal of two bye-passes passes through pressure-regulating valve 42 and the input terminal of high/low pressure cut-over valve 22 connects
It is logical.Air pressure on bye-pass is adjusted except through high/low pressure cut-over valve 22, also by pressure-regulating valve 42 from addition all the way
Two kinds of handover operations, it can be achieved that pressurizeing and vacuumizing are adjusted, different operation is carried out to first chamber and second chamber.
The high-voltage output end of high/low pressure cut-over valve 22 is connect with one end of shuttle valve 48, and low-voltage output passes through low pressure modulating valve
5 connect with the other end of shuttle valve 48.Two output ends of high/low pressure cut-over valve 22 respectively correspond two ports of shuttle valve 48, can only
Single output high pressure or low pressure, accuracy is higher, and low pressure can also be adjusted by low pressure modulating valve 5, further be mentioned
Anticyclonic accuracy.
Gas source filter 40 is additionally provided on the input port of main line, gas source filter is used for the impurity or dust in gas source
It is filtered, improves the patency of entire pipeline, raising vacuumizes or the accuracy of pressure process.
As shown in Figure 1 and Figure 4, gas source can be turned on or off by gas source manual switch 29, and cabinet is equipped with gas
Source import 26, gas source inlet 26 are connect with main line, and air inlet 27, each bye-pass are respectively equipped in first chamber and second chamber
Output end be connected to air inlet 27.
Pressure retaining valve 16 and negative pressure control valve 19 are equipped in first chamber and second chamber, so that first chamber or the second chamber
Indoor air pressure maintains stable state.Indicator light includes unqualified indicator light 6 and qualified indicator light 7.
As shown in Figure 3 and Figure 5, switch includes power switch 8, protective switch 9, starts switch 10, shutdown switch 11 and urgency
Guard's valve 12.Outside is equipped with attaching plug 24, for connecting with circumscripted power line.Switching Power Supply 31 can also be set, for for
Each switch provides independent current source.
The present invention also provides the detection methods using above-mentioned device for detecting sealability progress, include the following steps:
The high pressure detection of S10, the first/bis- chamber:
S11, gas source compressed air initial pressure major part situation are no more than 1.6MPa, cross 40um grades of gas source filters 40,
Pressure charging valve 41 is adjusted, air-flow is made to form high pressure draught by pressure charging valve 41, pressure can increase to 2~4 times of initial pressure, reach
High-voltage value, high pressure draught passes through high-voltage output end, shuttle valve 48, the reversal valve 47 of high/low pressure cut-over valve 22, using the second/mono- chamber
Vacuum reversal valve 44, vacuum on-off valve 45 on the corresponding bye-pass in room reach the second/mono- chamber；
Vacuum control valve 18 on S12, another bye-pass obtains electric opening, and vacuum generator 14 starts, and generates high vacuum,
Reach first chamber；
S13, vacuum on-off valve 45,45 solenoid valve of vacuum on-off valve on two bye-passes must be electrically activated, first chamber,
Second chamber and exterior line cutting, are respectively formed closed vacuum chamber, high pressure chest；
S14, high-precision pressure detection switch 46 detect the vacuum degree of the first/bis- chamber, and it is qualified to be shown by indicator light
Whether；Once the first/bis- chamber has the sealing element between leakage or first chamber and second chamber bad, vacuum degree can be substantially
Decline, high-precision pressure detection switch 46 are qualified or not come the leakproofness for concluding first chamber；
S15, the first/bis- chamber complete detection process, all valve power-off.
The low pressure detection of S20, the first/bis- chamber:
S21, high/low pressure cut-over valve 22 start, and switch to low-voltage output, and pressure is lowered to low-pressure settings, form low pressure
Air-flow, by shuttle valve 48, reversal valve 47, other steps are identical as the high pressure detecting step of S10, specifically:
S22, vacuum reversal valve 44, the vacuum on-off valve 45 corresponded on the bye-pass of the second/mono- chamber reach second chamber,
Vacuum control valve 18 on latter two right bye-pass obtains electric opening, the vacuum generator on the bye-pass of corresponding the first/bis- chamber
14 startings, generate high vacuum, reach the first/bis- chamber；
S23, vacuum on-off valve 45, the vacuum on-off valve 45 on two bye-passes must be electrically activated, first chamber, the second chamber
Room and exterior line cutting, are respectively formed closed vacuum chamber, low pressure chamber；
S24, high-precision pressure detection switch 46 detect the vacuum degree of the first/bis- chamber, and it is qualified to be shown by indicator light
Whether；Once the first/bis- chamber has the sealing element between leakage or first chamber and second chamber bad, vacuum degree can be substantially
Decline, high-precision pressure detection switch 46 are qualified or not come the leakproofness for concluding first chamber；
S25, the first/bis- chamber complete detection process, all valve power-off.
The present invention has the advantage that using compressed air as power
1. detecting the sealing performance of closed chamber using high pressure and low pressure two ways, high pressure can up to 4.0MPa, low pressure
To 0.1MPa, air pressure range is wide, is suitable for a variety of sealing propertytests；
2. being applicable in single-chamber detection, the leakproofness of two-chamber detection and cavity leakage simultaneously；
3. reachable-the 91Kpa of vacuum degree, high vacuum is occurred to ensure the accuracy detected using the above vacuum of second level
Device, specific air consumption save 50% than single stage vacuum, and complete machine power only has 50W, saves the energy.
The invention is not limited to above-mentioned preferred forms, and anyone should learn that is made under the inspiration of the present invention
Structure change, the technical schemes that are same or similar to the present invention are fallen within the scope of protection of the present invention.
Claims (9)
1. a kind of device for detecting sealability, including cabinet, which is characterized in that the cabinet is equipped with first chamber and second chamber,
The cabinet is additionally provided with:
Main line is equipped with pressure charging valve, high/low pressure cut-over valve, shuttle valve and reversal valve along airflow direction for connecting with gas source；
Two bye-passes, the input terminal connection of two bye-passes, each bye-pass are equipped with vacuum control along airflow direction
Valve and vacuum generator, vacuum reversal valve, vacuum on-off valve and pressure detection switch, the output end difference of two bye-passes
With two chambers, the vacuum reversal valve is set there are two input terminal, two vacuum generators respectively with it is described
One input terminal of reversal valve connects, two output ends of the reversal valve respectively with two vacuum reversal valves another
Input terminal connection；
Control device, including PLC controller, touch screen, multiple indicator lights and multiple switch, the pressure charging valve, high-low pressure switching
Valve, shuttle valve, reversal valve, vacuum control valve, vacuum generator, vacuum reversal valve, vacuum on-off valve and pressure detection switch difference
It is connect with the PLC controller.
2. device for detecting sealability according to claim 1, which is characterized in that the input terminal of two bye-passes is logical
Over-voltage force regulating valve is connected to the input terminal of the high/low pressure cut-over valve.
3. device for detecting sealability according to claim 1, which is characterized in that the High voltage output of the high/low pressure cut-over valve
End is connect with one end of the shuttle valve, and low-voltage output is connect by low pressure modulating valve with the other end of the shuttle valve.
4. device for detecting sealability according to claim 1, which is characterized in that be additionally provided on the input port of the main line
Gas source filter.
5. device for detecting sealability according to claim 1, which is characterized in that the cabinet is equipped with gas source inlet, institute
It states gas source inlet to connect with the main line, air inlet, each branch pipe is respectively equipped in the first chamber and second chamber
The output end on road is connected to the corresponding air inlet.
6. device for detecting sealability according to claim 1, which is characterized in that the first chamber and the second chamber
On be equipped with pressure retaining valve and negative pressure control valve.
7. device for detecting sealability according to claim 1, which is characterized in that the indicator light includes unqualified indicator light
With qualified indicator light.
8. device for detecting sealability according to claim 1, which is characterized in that the switch includes power switch, protection
It switchs, start switch, shutdown switch and emergency stop switch.
9. the detection method carried out using device for detecting sealability described in claim 1, which is characterized in that including walking as follows
It is rapid:
The high pressure detection of S10, the first/bis- chamber:
S11, adjust pressure charging valve, make air-flow by pressure charging valve formed high pressure draught, by the high-voltage output end of high/low pressure cut-over valve,
Shuttle valve, reversal valve reach the second/mono- using vacuum reversal valve, the vacuum on-off valve on the corresponding bye-pass of the second/mono- chamber
Chamber；
Vacuum control valve on S12, another bye-pass obtains electric opening, and vacuum generator starting generates high vacuum, reaches first
Chamber；
S13, vacuum on-off valve, the vacuum on-off valve on two bye-passes must be electrically activated, first chamber, second chamber and outside
Pipeline cutting, is respectively formed closed vacuum chamber, high pressure chest；
S14, high-precision pressure detection switch detect the vacuum degree of the first/bis- chamber, are shown by indicator light qualified or not；
S15, the first/bis- chamber complete detection process, all valve power-off；
The low pressure detection of S20, the first/bis- chamber:
S21, high/low pressure cut-over valve starting, switch to low-voltage output, and pressure is lowered to low-pressure settings, form low-pressure air current,
By low pressure modulating valve, shuttle valve, reversal valve, other steps are identical as the high pressure detecting step of S10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811397460.7A CN109253848A (en) | 2018-11-22 | 2018-11-22 | A kind of device for detecting sealability and its detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811397460.7A CN109253848A (en) | 2018-11-22 | 2018-11-22 | A kind of device for detecting sealability and its detection method |
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| CN201811397460.7A Pending CN109253848A (en) | 2018-11-22 | 2018-11-22 | A kind of device for detecting sealability and its detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307385A (en) * | 2019-11-07 | 2020-06-19 | 浙江大学 | Airtight detection device of case |
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