CN106441733A - Airtightness testing device - Google Patents
Airtightness testing device Download PDFInfo
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- CN106441733A CN106441733A CN201610836232.XA CN201610836232A CN106441733A CN 106441733 A CN106441733 A CN 106441733A CN 201610836232 A CN201610836232 A CN 201610836232A CN 106441733 A CN106441733 A CN 106441733A
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- gas
- tracheae
- mounting blocks
- tpe fitting
- plug
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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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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses an airtightness testing device, and the device comprises a differential pressure tester, an air source, a testing air pipe, and a contrast air pipe. The air outgoing end of the testing air pipe is connected with an end cap installation block, wherein the interior of the end cap installation block is provided with a gas flow through hole. The interior of the end cap installation block is provided with a PU end cap, wherein the interior of the PU end cap is provided with a gas flow through hole. The internal pipe cavity of the testing air pipe, the gas flow through hole in the end cap installation block and the gas flow through hole of the PU end cap are communicated sequentially. The device also comprises end cap pushing equipment which is used for pushing the end cap installation block to move towards a tested part so as to enable the air outgoing end of the PU end cap to be compressed onto the tested part tightly. The device provided by the invention can improve the airtightness detection accuracy and detection efficiency of a tested product, especially a USB charging interface.
Description
Technical field
The application relates to a kind of tightness measuring device, especially a kind of pressure for testing USB charging inlet sealing
Difference method test device.
Background technology
With mobile phone market competition, increasing three anti-mobile phones become new attraction, even each height
The standard configuration of terminal.Three prevent including dust-proof, waterproof, shatter-resistant.Wherein as waterproof generally referred to as under water the 1 of one of key technology
The degree of depth of rice, soaks 30 minutes, differentiates machine by human eye and judges either with or without water inlet.Quantify by IP grade, i.e. full
Foot water proof and dust proof grade is not less than IP7.
With the raising of manufacturing process, and quality process is more perfect, and in mobile phone production process, quality management and control is increasingly
Strictly.In order to reduce risk, improving quality, increasing user satisfaction, the product component producing generally is carried out by cell phone manufacturer
Sampling observation, even examines entirely.For waterproof sealing test, the main method using insufflation gas, mainly has three kinds of methods：Pressure decline method, difference
Platen press, big discharge method.Mainly use pressure decline method at present during system test, seldom circuit board parts are individually surveyed
Examination.
The known device using pressure decline method testing mobile phone sealing has two kinds of thinkings.A kind of have one to open in mobile phone shell
Hole, test device pours gases at high pressure by this hole to complete machine, and inflation tracheae one end is connected with baroceptor, when gas pours
To certain pressure value, inflation gas circuit closes (not affecting pressure sensor detection), after pressurize a period of time, passes through baroceptor
The change of observed pressure value judges that whether product is qualified.Another kind of improved mode is for being placed in closed container by complete machine, at machine
Shell external pressurized mode is so that more preferable analogue mobile phone situation about being once stressed under water.
But, pressure decline method has an obvious shortcoming, and the dwell time is long, and precision is not high.Modern industry is produced in enormous quantities
Requiring very harsh to man-hour, the testing time more than 1 minute can not meet plant requirements, especially all requires detection at product
In the case of.In addition, the finished product having assembled goes wrong if doing over again, not only make the operation above assembling slattern, tear machine needs open
The more time.
For the deficiency of pressure decline method, people begin to use differential pressure method to carry out air tightness test to product.Differential pressure method test is former
Reason can refer to shown in Fig. 1, is divided into the main composition part of pressure difference meter inside dotted line frame.Air inlet gas circuit is divided into two-way, a road
Through the second magnetic valve 16, as the action gas circuit of pneumatic control valve 17；Another road is test gas circuit, first passes through micro-mist separator
Moisture in 13 particles removing more than 0.01 μm and air, precision pressure gauge 14 is used for controlling the blowing pressure of test gas,
It is then passed through the first magnetic valve 15.Pneumatic control valve 17 is connected to the downstream of the first magnetic valve 15 and the second magnetic valve 16, when
During two magnetic valve 16 conducting ventilations, pneumatic control valve 17 is opened, and the test gas coming of being let pass by the first magnetic valve 15 passes through
The outlet side of pneumatic control valve 17 is inflated (now tested to measured piece A and control piece B by testing tracheae 3 with comparison tracheae 4 respectively
Part A connects with control piece B gas phase).When the air pressure in measured piece A and control piece B reaches identical preset value, close the first electricity
Magnet valve 15 and the second magnetic valve 16 stop inflation, and keep measured piece A and the isolation of control piece B gas phase.Pressure in pressure difference meter
Force snesor 18 can detect the pressure of test gas circuit in real time, and differential pressure pick-up 19 detects test lead and the pressure of comparison end in real time
Difference.If measured piece A has a leakage problem (control piece B will not leak gas), then differential pressure pick-up 19 be just capable of detecting when measured piece A and
The pressure differential of control piece B, according to equation below, draws leakage volume change, in conjunction with the testing time, and then draws leakage speed
Degree.
Δ P=P × Δ V ÷ (V+ Δ V) (2-1)
VL=Δ V ÷ T (2-2)
In formula,
ΔP：Test cavity and comparison chamber pressure difference, differential pressure pick-up records
P：Pressure during inflation, is recorded by pressure difference meter device Pressure gauge
ΔV：The Volume Changes value of two cavitys
VL：Reveal speed
T：Testing time.
But, it when using the sealing of pressure differential method test product, is difficult to accomplish that test tracheae 3 outlet side and measured piece A are (outstanding
It is USB charging inlet) fully seal at air inlet, reveal the interior during this period of time of speed at test measured piece, have very big one
Portion gas is spilt with the gap of measured piece A junction by testing tracheae 3, but this part leakage gas is not because of quilt
Survey the sealing problem of part A self and produce, and the error being because testing the fault of construction of device and producing, and this is by mistake
Difference is generally large, therefore there is the poor problem of accuracy in detection, has higher impact during high precision measurement.This
Outward, compare tracheae 4 outlet side and be also difficult to positive confinement with control piece B junction.If able to ensure to test at pressure reduction
Cheng Zhong, makes test gas circuit identical with the leakage rate of comparison gas circuit (rather than measured piece and control piece self), then differential pressure senses
Pressure differential pace of change detected by device 19 just truly reflects the measured piece A leakage rate of self.
Content of the invention
The purpose of the application is：A kind of tightness measuring device is provided, to improve, test product especially USB is charged
The sealing propertytest accuracy rate of interface and detection efficiency.
In order to achieve the above object, the technical scheme of the application is：
A kind of tightness measuring device, including：
Pressure difference meter, its have at least one air inlet and including the first gas outlet and the second gas outlet extremely
Few two gas outlets；
Source of the gas, it is connected with at least one described air inlet of described pressure difference meter by air inlet pipeline；
Test tracheae, its described first gas outlet connecting described pressure difference meter and measured piece, with to described measured piece
Inflation；And
Comparison tracheae, its described second gas outlet connecting described pressure difference meter and control piece, with to described control piece
Inflation；
The outlet side of described test tracheae connects its interior plug mounting blocks with gas communication hole, this plug mounting blocks
Middle install one in it with PU plug of gas communication hole, the gas in the interior lumen of described test tracheae, plug mounting blocks
Gas communication hole in opening and PU plug is sequentially communicated, and also includes for promoting described plug mounting blocks to described measured piece
Plug pushing equipment that is mobile and then that make the outlet side sealing of described PU plug be pressed on described measured piece.
The application, on the basis of technique scheme, also includes following preferred version：
The outlet side of described test tracheae is the first gas by being provided with gas communication hole in it with described plug mounting blocks
Pipe joint is connected, and the outlet side of this first gas-tpe fitting is formed with external screw thread, the hole of gas communication hole in described plug mounting blocks
Being formed with internal thread on wall, the inlet end of described first gas-tpe fitting plugs the outlet side being connected to described test tracheae, and described the
The outlet side of one gas-tpe fitting is by gas communication hole hole wall in its upper described external screw thread arranging and this plug mounting blocks
Internal thread locking coordinates.
The outlet side of described comparison tracheae is to be connect by being provided with the second tracheae of gas communication hole in it with described control piece
Head is connected, and the outlet side of this second gas-tpe fitting is formed with external screw thread, and described control piece is a blind bored member with blind hole, and
Being formed with internal thread on the hole wall of described blind hole, the inlet end of described second gas-tpe fitting plugs and is connected to going out of described comparison tracheae
Gas end, the outlet side of described second gas-tpe fitting is by blind hole hole wall in its upper described external screw thread arranging and this control piece
Described internal thread locking coordinates.
Described first gas-tpe fitting and described second gas-tpe fitting equivalently-sized, on described control piece blind hole aperture with
In described plug mounting blocks, the aperture of gas communication hole is identical, the internal thread on blind hole hole wall and described plug on described control piece
In mounting blocks, the dimension of inner screw thread on gas communication hole hole wall is identical.
The inlet end of described test tracheae is connected by the 3rd gas-tpe fitting with the first gas outlet of described pressure difference meter,
The inlet end of described comparison tracheae is connected by the 4th gas-tpe fitting with the second gas outlet of described pressure difference meter, and the described 3rd
Gas-tpe fitting and the 4th gas-tpe fitting are of the same size and structure.
Described plug pushing equipment includes：
Cylinder, it is used for providing motive force；
Guide rail, it is slidably connected with described plug mounting blocks, to guide the movement of described plug mounting blocks；
Elastic telescopic frame, it is connected between described cylinder and following pressure sensor, with pushing away of providing described cylinder
Power passes to following pressure sensor, and this elastic telescopic frame can produce；And
Pressure sensor, it is connected between described elastic telescopic frame and described plug mounting blocks, by described elastic telescopic
The motive force that frame is subject to passes to described plug mounting blocks.
The drive end of described cylinder is hinged with described elastic telescopic frame, and described cylinder is arranged on one can regulate this cylinder
On the regulation slide unit of position.
Also include moving towards for positioning described test tracheae and comparison tracheae and making described test tracheae and comparison tracheae put down
Several tracheae geometrical clamps that row is arranged, and described test tracheae is the length nylon gas identical with caliber with comparison tracheae
Pipe.
Described nylon air pipe sleeve is provided with one layer of antivibration outer tube, and described tracheae geometrical clamp is clipped on described antivibration outer tube.
Described measured piece is USB charging inlet.
The application provides the benefit that：
1st, the outlet side of this test of the application device to test tracheae by can the PU plug of compressive deformation skilful with measured piece
Wonderful cooperation, it is achieved test tracheae and measured piece junction seal air tight, substantially increase measured piece sealing propertytest result
Accuracy.
2nd, comparing the testing time of other more than like product 30s, the testing time of the application this test device can be excellent
Change and arrive 5.5s, be highly suitable for modern factories and produce in enormous quantities.
3rd, this test device leakage resolution ratio can reach 0.0005sccm, fully meets IP7 and above waterproof test is wanted
Ask.
4th, this test device to test is reproducible, and retest uniformity CP can reach more than 5.0.
5th, the cabling fixed form of this test device to test tracheae and comparison tracheae can resist bigger vibration, test waves
Dynamic little.
Brief description
Fig. 1 is the overall structure schematic diagram of tightness measuring device in the embodiment of the present application, and wherein measured piece and plug push away
Dynamic equipment is not shown；
Fig. 2 is the F portion enlarged drawing of Fig. 1；
Fig. 3 is the structural representation of plug pushing equipment in the embodiment of the present application；
Wherein：A-measured piece, B-control piece, 1-pressure difference meter, 2-source of the gas, 3-tests tracheae, and 4-compares tracheae, 5a-
First tubular construction, 5b-the second pipe joint, 5c-the 3rd pipe joint, 5d-the 4th pipe joint, 6-plug mounting blocks, 7-PU plug, 8-
Cylinder, 9-guide rail, 10-elastic telescopic frame, 11-pressure sensor, 12-regulates slide unit, 13-micro-mist separator, 14-precision pressure
Table, 15-the first magnetic valve, 16-the second magnetic valve, 17-pneumatic control valve, 18-pressure inductor, 19-differential pressure pick-up, 20-
3rd magnetic valve, 21-the first pressure-reducing valve, 22-the second pressure-reducing valve, 23-tracheae geometrical clamp.
Detailed description of the invention
Combine accompanying drawing below by detailed description of the invention to be described in further detail the application.The application can be with multiple
Different forms realizes, however it is not limited to the embodiment described by the present embodiment.The purpose of detailed description below is provided
Being easy for becoming apparent from thorough explanation to present disclosure, wherein the words of the indicating positions such as upper and lower, left and right is only pin
To shown structure in respective figure for position.
But, those skilled in the art may be aware that one or more detail describes can be by
Omit, or other method, assembly or material can also be used.In some instances, some embodiments do not have description
Or be not described later in detail.
Additionally, technical characteristic described herein, technical scheme can also be closed with any in one or more embodiments
Suitable mode combines.For a person skilled in the art, it is easy to understand the method relevant with embodiment provided herein
Step or operation order can also change.Therefore, any order in drawings and Examples is merely illustrative purposes, not secretly
Show requirement in a certain order, require unless expressly stated according to a certain order.
It herein for parts institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Not there is any order or art-recognized meanings.And the application described " connection ", " connection ", if no special instructions, all include direct with
It is indirectly connected with (connection).
Fig. 1～Fig. 3 shows a specific embodiment of this tightness measuring device of the application, surveys with Traditional differential pressure method
Electricity testing device is identical, this device also include pressure difference meter the 1st, source of the gas the 2nd, test tracheae 3 and comparison tracheae 4.Pressure difference meter 1
Having two air inlets and two gas outlets (the respectively first gas outlet and the second gas outlet), this pressure difference meter 1 is by France
ATEQ company produces, and its resolution ratio can reach 0.6Pa.Two air inlets are all connected with source of the gas 2, one of them air inlet and the second electricity
Magnet valve 16 is connected, as the air inlet of action gas circuit；Another air inlet and the first magnetic valve 15 are connected, as test gas circuit
Air inlet.By test tracheae 3, (in the present embodiment, this measured piece A is specially USB charging with measured piece A in first gas outlet
Mouthful) be connected, with to measured piece A inflation；Second gas outlet is connected with control piece B by compareing tracheae 4, with to control piece B inflation.
The key improvements of the present embodiment is that testing tracheae 3 have employed special version with the junction of measured piece A,
Substantially air tight to ensure when pressure reduction is tested at measured piece A air inlet, specific as follows：
The outlet side of described test tracheae 3 connects its interior plug mounting blocks 6 with gas communication hole, and this plug is installed
Block 6 is installed its interior PU plug 7 (i.e. the plug of PU material) with gas communication hole.The inner tube of described test tracheae 3
Gas communication hole in chamber, plug mounting blocks 6 and the gas communication hole in PU plug 7 are sequentially communicated.It is additionally provided with plug to promote
Equipment, this plug pushing equipment is used for promoting described plug mounting blocks 6 to move to described measured piece A, and then makes described PU plug 7
Outlet side seal and be pressed on and (be specifically pressed at the air inlet of measured piece A) on described measured piece A, and PU plug 7 is by bullet
Property is pressed between plug mounting blocks 6 and measured piece A, also achieves gas communication hole, PU plug 7 in plug mounting blocks 6 simultaneously
Interior gas communication hole connects with the sealing of self air admission hole of measured piece A.
In order to ensure PU plug 7 and measured piece A good contact, make simultaneously PU plug be squeezed power when there is enough changes
Shape amount to ensure the sealing between PU plug 7 and plug mounting blocks 6 and measured piece A, the outlet side of PU plug 7 in the present embodiment
Protrude from outside described plug mounting blocks 6.
Although said structure design has been completely secured differential pressure test, PU plug 7 and plug mounting blocks 6 and PU plug 7
And the sealing between measured piece A, but it cannot be guaranteed that test the sealing of tracheae 3 and plug mounting blocks 6 junction, also simultaneously
It cannot be guaranteed that comparison tracheae 3 and the sealing of control piece B junction, set in this regard, the present embodiment have employed following structure further
Meter, so that test tracheae 3 and the leakage rate of plug mounting blocks 6 junction (very little) and compare tracheae 3 and control piece B company
The leakage rate (very little) meeting place is basically identical, specific as follows：
The outlet side of test tracheae 3 is the first gas-tpe fitting by being provided with gas communication hole in it with plug mounting blocks 6
5a is connected.The outlet side of this first gas-tpe fitting 5a is formed with external screw thread, in plug mounting blocks 6 gas communication hole hole wall on system
Having internal thread, the inlet end of the first gas-tpe fitting 5a plugs the outlet side being connected to test tracheae 3, and the first gas-tpe fitting 5a
Outlet side is coordinated with the internal thread locking on gas communication hole hole wall in plug mounting blocks 6 by the external screw thread arranging on it.
The outlet side of comparison tracheae 4 is the second gas-tpe fitting 5b phase by being provided with gas communication hole in it with control piece B
Even.The outlet side of this second gas-tpe fitting 5b is formed with external screw thread, and control piece B is a blind bored member with blind hole, and described
Being formed with internal thread on the hole wall of blind hole, the inlet end of the second gas-tpe fitting 5b plugs the outlet side being connected to compare tracheae 4, and the
The outlet side of two gas-tpe fitting 5b is joined with the internal thread locking on blind hole hole wall in this control piece B by the external screw thread arranging on it
Close.
It is not difficult to find out from above, be indirectly connected with testing tracheae 3 because the present embodiment have employed the PU plug of elastically deformable
Outlet side and measured piece A, in differential pressure test process, be capable of by extruding PU plug testing tracheae 3 and measured piece A's
It is tightly connected air tight (and because of the crimp of PU plug, PU plug also seals with plug mounting blocks and coordinates).Although first
Gas-tpe fitting can produce with the threaded connection place of plug mounting blocks with socket place and first gas-tpe fitting of test tracheae on a small quantity
Gas leakage, but the present embodiment connects comparison tracheae 4 and control piece B owing to have employed same version, therefore compare tracheae 4
With control piece B junction, there is the leakage rate identical with test tracheae and plug mounting blocks 6 junction, carrying out differential pressure test
When, the two is cancelled out each other, and is equivalent to the two and all seals air tight at above-mentioned correspondence position, at all has no effect on the standard of test result
True property.
And, in the present embodiment, described first gas-tpe fitting 5a's and the second gas-tpe fitting 5b is equivalently-sized, control piece
The aperture of the upper blind hole of B is identical with the aperture of gas communication hole in plug mounting blocks 6, simultaneously interior on blind hole hole wall on control piece B
Screw thread is also identical with the dimension of inner screw thread on gas communication hole hole wall in plug mounting blocks 6, so can further improve comparison gas
Pipe 4 and the uniformity of control piece B junction and test tracheae and plug mounting blocks 6 junction leakage rate.Additionally, plug is installed
Block 6 uses identical material, generally metal material with blind bored member.
It is considered that test tracheae 3 and the junction that pressure difference meter 1 first is worked off one's feeling vent one's spleen are likely to produce a small amount of gas leakage, with
When comparison tracheae 4 and the junction that pressure difference meter 1 second is worked off one's feeling vent one's spleen be likely to produce and leak gas on a small quantity, the present embodiment example is extra again
Be provided with two gas-tpe fitting the 3rd gas-tpe fitting 5c and the 4th gas-tpe fitting 5d, and the two gas-tpe fitting 5 with upper
The structure stating the first and second gas-tpe fittings is consistent, and wherein the 3rd gas-tpe fitting 5c connects the first of described pressure difference meter 2 and goes out
The inlet end of gas port and test tracheae 3, the 4th gas-tpe fitting 5d connects the second gas outlet of described pressure difference meter 2 and compares gas
The inlet end of pipe 4.Specifically, the inlet end of the 3rd air pipe structure 5c passes through in external screw thread and first gas outlet of setting on it
The internal thread locking arranging coordinates, and the outlet side of the 3rd air pipe structure 5c plugs the inlet end being connected to test tracheae 3；4th gas
The inlet end of tubular construction 5d is by the external screw thread of setting on it and the internal thread locking cooperation of setting in the second gas outlet, the 4th gas
The outlet side of tubular construction 5c plugs the inlet end being connected to compare tracheae 4.So ensure test tracheae 3 and pressure difference meter 1 the
One junction worked off one's feeling vent one's spleen and comparison tracheae 4 have essentially identical leakage with the junction that pressure difference meter 1 second is worked off one's feeling vent one's spleen
Gas speed, when carrying out differential pressure test, the two is cancelled out each other, and has no effect on the accuracy of test result.
In like manner, described 3rd gas-tpe fitting 5c and the 4th gas-tpe fitting 5d is also adopted by identical size, to improve further
Test tracheae 3 and pressure difference meter 1 first are worked off one's feeling vent one's spleen junction and compare tracheae 4 and work off one's feeling vent one's spleen with pressure difference meter 1 second and be connected
The uniformity of place's leakage rate.
In the present embodiment, described plug pushing equipment includes cylinder the 8th, guide rail the 9th, elastic telescopic frame 10 and pressure sensor
11.Wherein, cylinder 8 is used for providing motive force.Guide rail 9 is slidably connected with plug mounting blocks 6, to guide the shifting of plug mounting blocks 6
Dynamic.Elastic telescopic frame 10 is connected between cylinder 8 and pressure sensor 11, so that the motive force that cylinder 8 provides is passed to pressure
Sensor 11.Pressure sensor 11 is connected between elastic telescopic frame 10 and plug mounting blocks 6, to be subject to elastic telescopic frame 10
Motive force pass to described plug mounting blocks 6.
In the present embodiment, above-mentioned elastic telescopic frame 10 is main by left semi-frame, right semi-frame and be connected horizontally on left semi-frame and the right side
Spring between semi-frame is constituted, and when this elastic telescopic frame 10 is by the extruding force of horizontal direction or tensile force, spring can be therewith
Deform upon.
During actual application, cylinder 8 action and promote forward elastic telescopic frame 10, the promotion that elastic telescopic frame 10 is subject to
Power passes to pressure sensor 11 and plug mounting blocks 6 successively, and drives plug mounting blocks 6 to move forward, and seals PU plug 7
It is pressed on measured piece A.In the process, elastic telescopic frame 10 (spring in this elastic telescopic frame specifically) is because being subject to
Extruding force and produce shortening deformation, pressure sensor 11 detects its pressure experienced value, namely the pressure that PU plug 7 is to measured piece A
Force value, in reality application, this force value is typically greater than test pressure, and (i.e. during differential pressure test, measured piece and the initial of control piece are pressed
Power) 3 times.
In the present embodiment, the drive end of described cylinder 8 is hinged with elastic telescopic frame 10 (i.e. rotate and be connected), and cylinder 8
It is arranged on a regulation slide unit 12, during actual application, can manually adjust this cylinder 8 and (set on slide unit at regulation slide unit 12
Be equipped with manual adjustment knob) initial position, change the deformation quantity of elastic telescopic frame 10, and then change what PU plug 7 was subject to
Extruding force.
Being not difficult to find out, the deflection of elastic telescopic frame inner spring determines the extruding force to measured piece A for the PU plug, available
The deflection of above-mentioned regulation slide unit regulation cylinder compression elastic telescopic frame inner spring, and then the PU plug pair during regulation pressure reduction test
The pressure of measured piece.
Owing to the filled volume of measured piece is very little, the small vibration of test gas circuit all can have very big shadow to test result
Ring.In order to prevent gas circuit from expanding the impact on test, described test tracheae 3 and comparison tracheae 4 all use nylon tracheae, meanwhile,
Make test tracheae identical with caliber with the length of comparison tracheae as far as possible.Additionally, be also provided with multiple tracheae geometrical clamp 23, these gas
Pipe clip 23 is used for positioning the trend of described test tracheae 3 and comparison tracheae 4, and makes described test tracheae 3 and comparison tracheae 4
Be arranged in parallel (i.e. the two cabling is consistent), causes two pipe cavity volumes to become to eliminate the environmental changes such as vibration further
Change inconsistent error.And at least the near joints of test tracheae 3 and comparison tracheae 4 to be provided with tracheae geometrical clamp 23.
Further, the present embodiment nylon air pipe sleeve set one layer of major diameter antivibration outer tube, each tracheae geometrical clamp 23 above-mentioned is equal
It is directly sandwiched on this antivibration outer tube, limit test tracheae 3 and the trend of comparison tracheae 4 successively, so can mitigate test tracheae 3
With comparison tracheae 4 in use vibrations received.
Above content is to combine the further description that the application is made by specific embodiment, it is impossible to assert this Shen
Being embodied as please is confined to these explanations.For the application person of an ordinary skill in the technical field, do not taking off
On the premise of the application conceives, some simple deduction or replace can also be made.
Claims (10)
1. a tightness measuring device, including：
Pressure difference meter (1), its have at least one air inlet and including the first gas outlet and the second gas outlet extremely
Few two gas outlets；
Source of the gas (2), it is connected with at least one described air inlet of described pressure difference meter by air inlet pipeline；
Test tracheae (3), its described first gas outlet connecting described pressure difference meter and measured piece (A), with to described tested
Part is inflated；And
Comparison tracheae (4), its described second gas outlet connecting described pressure difference meter and control piece (B), with to described comparison
Part is inflated；
It is characterized in that, the outlet side of described test tracheae (3) connects its interior plug mounting blocks with gas communication hole
(6) this plug mounting blocks (6), is installed one in it with PU plug (7) of gas communication hole, described test tracheae (3) interior
Gas communication hole in portion's tube chamber, plug mounting blocks (6) and the gas communication hole in PU plug (7) are sequentially communicated, and also include using
In the outlet side sealing pressure promoting described plug mounting blocks (6) mobile to described measured piece (A) and then to make described PU plug (7)
Tight plug pushing equipment on described measured piece (A).
2. tightness measuring device according to claim 1, it is characterised in that the outlet side of described test tracheae (3) with
Described plug mounting blocks (6) is connected by being provided with first gas-tpe fitting (5a) of gas communication hole in it, this first tracheae
The outlet side of joint (5a) is formed with external screw thread, the hole wall of the interior gas communication hole of described plug mounting blocks (6) is formed with internal thread, institute
The inlet end stating the first gas-tpe fitting (5a) plugs the outlet side being connected to described test tracheae (3), described first gas-tpe fitting
(5a) outlet side is by the described external screw thread of setting on it and the interior spiral shell on this interior gas communication hole hole wall of plug mounting blocks (6)
Line locking coordinates.
3. tightness measuring device according to claim 2, it is characterised in that the outlet side of described comparison tracheae (4) with
Described control piece (B) is connected by being provided with second gas-tpe fitting (5b) of gas communication hole in it, this second gas-tpe fitting
(5b) outlet side is formed with external screw thread, and described control piece (B) is a blind bored member with blind hole, and on the hole wall of described blind hole
Being formed with internal thread, the inlet end of described second gas-tpe fitting (5b) plugs the outlet side being connected to described comparison tracheae (4), described
The outlet side of the second gas-tpe fitting (5b) is by the described external screw thread of setting on it and the institute on the interior blind hole hole wall of this control piece (B)
State internal thread locking to coordinate.
4. tightness measuring device according to claim 3, it is characterised in that described first gas-tpe fitting (5a) and described
Second gas-tpe fitting (5b) equivalently-sized, the aperture of the upper blind hole of described control piece (B) and the interior gas of described plug mounting blocks (6)
The aperture of opening is identical, the internal thread on the upper blind hole hole wall of described control piece (B) and the interior gas stream of described plug mounting blocks (6)
Dimension of inner screw thread on through hole hole wall is identical.
5. tightness measuring device according to claim 1, it is characterised in that the inlet end of described test tracheae (3) with
First gas outlet of described pressure difference meter (2) is connected by the 3rd gas-tpe fitting (5c), the inlet end of described comparison tracheae (4)
It is connected by the 4th gas-tpe fitting (5d) with the second gas outlet of described pressure difference meter (2), described 3rd gas-tpe fitting (5c)
It is of the same size and structure with the 4th gas-tpe fitting (5d).
6. tightness measuring device according to claim 1, it is characterised in that described plug pushing equipment includes：
Cylinder (8), it is used for providing motive force；
Guide rail (9), it is slidably connected with described plug mounting blocks (6), to guide the movement of described plug mounting blocks (6)；
Elastic telescopic frame (10), it is connected between described cylinder (8) and following pressure sensor (11), with by described cylinder
(8) motive force providing passes to following pressure sensor (11), and this elastic telescopic frame (10) can produce；And
Pressure sensor (11), it is connected between described elastic telescopic frame (10) and described plug mounting blocks (6), by described bullet
The motive force that property expansion bracket (10) is subject to passes to described plug mounting blocks (6).
7. tightness measuring device according to claim 6, it is characterised in that the drive end of described cylinder (8) with described
Elastic telescopic frame (10) is hinged, and described cylinder (8) is arranged on a regulation slide unit (12) that can regulate this cylinder location.
8. tightness measuring device according to claim 1, it is characterised in that also include for positioning described test tracheae
(3) move towards with comparison tracheae (4) and make described test tracheae (3) and compare tracheae (4) several tracheaes of being arranged in parallel and fix
Folder (23), and described test tracheae (3) is the length nylon tracheae identical with caliber with comparison tracheae (4).
9. tightness measuring device according to claim 1, it is characterised in that described nylon air pipe sleeve is provided with a layer and resists
Shake outer tube, and described tracheae geometrical clamp (23) is clipped on described antivibration outer tube.
10. tightness measuring device according to claim 1, it is characterised in that described measured piece (A) is USB charging
Mouthful.
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| CN201610836232.XA CN106441733A (en) | 2016-09-20 | 2016-09-20 | Airtightness testing device |
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| CN110160555A (en) * | 2019-05-17 | 2019-08-23 | 陕西飞机工业（集团）有限公司 | A kind of aircraft differential pressure pickup detection device |
| CN114001883A (en) * | 2021-12-30 | 2022-02-01 | 山东海林环保设备工程有限公司 | Sealing performance detection device of environmental protection equipment |
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