CN109596288A - A kind of sealing property detection device and detection method - Google Patents
A kind of sealing property detection device and detection method Download PDFInfo
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- CN109596288A CN109596288A CN201910115948.4A CN201910115948A CN109596288A CN 109596288 A CN109596288 A CN 109596288A CN 201910115948 A CN201910115948 A CN 201910115948A CN 109596288 A CN109596288 A CN 109596288A
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- pressure
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- detection
- cofferdam
- sealing property
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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
- G01M3/32—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 for containers, e.g. radiators
- G01M3/3236—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 for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—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 for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to a kind of sealing property detection device and detection methods, including pressure cabin, support device, pressure-regulating device and control system, the pressure cabin is mounted in support device, with the detection cabin for forming center after unit under test palette and around the cofferdam in a ring for detecting week out of my cabin when pressure chamber physical examination survey, pressure-regulating device is connect for adjusting and detecting the pressure in detection cabin and cofferdam with pressure cabin, and the pressure-regulating device is connect with control system.Operation of the present invention is simple, quick, applicability is good, the accuracy and detection efficiency of sealing performance judgement can be improved, and can assist whether detection Internal and external cycle sealing strip damages, overhaul of train-set quality is improved, the vehicle side window repair time is reduced, reduces the side window cost of overhaul after sale.
Description
Technical field
The present invention relates to a kind of detection device and detection methods, in particular to a kind of for detecting such as Vehicle side power window equipment
The detection device and detection method of sealing performance.
Background technique
There is guest room side window roof leaking phenomenon during operation in EMU, and such situation can damage side window surrounding buffer compartment
The components such as sound material and interior trim, the vehicle for the side window that seeps water need to return factory Duan Weixiu, influence to run the period in line of vehicles.Preliminary analysis
The reason of causing side window to seep water be the long-term aging leakproofness of sealant on the outside of EMU guest room side window destroyed and caused by.
According to overhaul of train-set regulatory requirements, EMU side window is repair based on condition of component, and vehicle is without salt fog test, side window sealing performance
Visual inspection apparent condition can only be taken to judge whether side seeps water at present.This inspection method is to worker's experience and sense of responsibility
It is required that it is very high, phenomena such as being easy to appear erroneous judgement and fail to judge.
In the prior art, in order to solve the problems, such as doors and windows sealing performance detection, in Patent No. 201820094051
Provide a kind of vehicle dormer window single-item cubing, including a gas gathering mask in patent, when detection covers on the day of automobile using gas gathering mask
It is all outside window, make to form closed environment between gas gathering mask and car body, recycles air exhauster pumping, air pressure detector is observed, in list
Air pressure drop in the time of position in confined space then determines product qualification as low as standard value, otherwise unqualified.But this kind of air-tightness inspection
Survey device and realize sealing between unit under test using a circle sealing joint strip, if the sealing joint strip is damaged or sealing joint strip with
Poor sealing between unit under test can all directly affect the accuracy of detection.Wherein sealing joint strip it is whether damaged or with tested portion
Between whether poor sealing, require by Artificial Cognition, accuracy is lower, also directly affects the accuracy and effect of testing result
Rate.
Summary of the invention
The present invention solves the technical problem of provide a kind of easy to operate, can greatly improve detection accuracy and inspection
Survey the sealing property detection device and detection method of efficiency.
To achieve the above object, the technical scheme is that
A kind of sealing property detection device, including pressure cabin, support device, pressure-regulating device and control system, institute
It states pressure cabin to be mounted in support device, forms the inspection at center when the pressure chamber physical examination is surveyed and after unit under test palette
It surveys cabin and around cofferdam in a ring all out of my cabin is detected, pressure-regulating device is connect with pressure cabin for adjusting and detecting
The pressure in cabin and cofferdam is detected, the pressure-regulating device is connect with control system.
Further, adjusting the cofferdam and detecting the pressure in cabin includes vacuumize reaching to cofferdam and detection cabin
Negative pressure sets initial pressure value, or carries out application positive pressure to cofferdam and detection cabin and reach positive pressure setting initial pressure value.
Further, the pressure-regulating device successively adjusts cofferdam, the pressure in detection cabin to setting initial pressure value.
Further, the support device includes bracket, mounting rack and regulating mechanism, and the mounting rack is movably arranged on bracket
On, the regulating mechanism includes the elevating mechanism for adjusting pressure cabin height and the inclination angle for adjusting pressure cabin inclination angle
Regulating mechanism, the both ends difference mounting bracket of the elevating mechanism and mounting rack, the both ends of the incidence regulating mechanism connect respectively
It connects on mounting rack and pressure cabin.
Further, the incidence regulating mechanism includes upper and lower two and tilts forward and back cylinder, one end of tilt cylinders and pressure
Cabin connection, the other end are connect with mounting rack, and two tilt cylinders adjust pressure cabin front and rear tilt angle.
Further, the pressure cabin is made of the shell and internal annular partition of box-like, and annular partition surrounds detection
Cabin surrounds cofferdam between shell and annular partition, be separately installed with a circle sealing strip at the edge of shell and annular partition.
Further, the pressure cabin is bonded by transparent acrylic board.
Another technical solution of the invention is:
A kind of detection method of the sealing performance of sealing property detection device as described above, includes the following steps:
A, the installation site for adjusting pressure cabin, is bonded pressure cabin with unit under test；
B, the pressure in cofferdam is adjusted to the first setting initial pressure Pc1, according in cofferdam within the set time
Whether pressure change meets setting condition, and whether the leakproofness in detection and isolation cabin is qualified, and qualification continues step C, unqualified termination
Test；
C, continue to adjust the pressure in detection cabin to the second setting initial pressure Pc2, according to detecting cabin within the set time
Whether interior pressure change meets setting condition, judges whether the leakproofness of unit under test is qualified.
Further, it in above-mentioned steps B and C, imposes a condition specifically, when cofferdam or detection lock pressure power are changed to and start to press
When force value Ps, start pressure maintaining timing, in pressure maintaining setting time t, if the real-time pressure value P in cofferdam or detection cabin reaches
Setting terminates pressure value P j, is determined as that sealing performance is unqualified, sets if the real-time pressure value P in cofferdam or detection cabin is less than
Surely terminate pressure value P j, be determined as sealing performance qualification.
Further, adjusting the cofferdam and detecting the pressure in cabin includes vacuumize reaching to cofferdam and detection cabin
First setting initial pressure Pc1 of negative pressure and the second setting initial pressure Pc2, or application positive pressure is carried out to cofferdam and detection cabin
Reach the first setting initial pressure Pc1 and the second setting initial pressure Pc2 of positive pressure.
In conclusion a kind of sealing property detection device provided by the invention and detection method, easy to operate, quick, suitable
It is good with property, by the way that the structure of cofferdam is arranged again in the periphery in detection cabin, pressure adjusting is carried out simultaneously to cofferdam and detection cabin,
Guarantee the pressure in detection cabin using cofferdam, and assist whether detection Internal and external cycle sealing strip damages, it is close to improve guest room side window
The accuracy and detection efficiency of sealing property judgement solve guest room side window because sealant aging infiltration can not accurately detect leakproofness
The problem of.The present invention is conducive to evade in advance EMU and occurs side window roof leaking risk in operation simultaneously, improves overhaul of train-set
Quality reduces the vehicle side window repair time, reduces the side window cost of overhaul after sale.
The present invention in addition to the sealing performance that can detecte passenger room of railway vehicle side window, apply also for detection automobile skylight,
The sealing performance of external window of building.
Detailed description of the invention
Fig. 1 is structure of the detecting device schematic diagram of the present invention；
Fig. 2 is the lateral view of Fig. 1；
Fig. 3 is detection device detection schematic diagram of the present invention；
Fig. 4 is pressure chamber structural schematic diagram of the present invention；
Fig. 5 is the A-A cross-sectional view of Fig. 4；
Fig. 6 is I partial enlarged view of Fig. 5；
Fig. 7 is extract system structural schematic diagram of the present invention.
As shown in Figures 1 to 7, side wall 1, side window 2, pressure cabin 3, shell 3a, annular partition 3b, strengthening rib strip 3c, branch
Support arrangement 4, bracket 4a, mounting rack 4b, sliding rail 4c, control cabinet 5, detection cabin 6, cofferdam 7, external seal strip 8, interconnecting piece 8a take
Socket part 8b, interior sealing strip 9, window skeleton 10, glass for vehicle window 11, sealant 12, the first gas connector 13, the second gas connector 14, lifting
Mechanism 15, incidence regulating mechanism 16, vacuum pump 17, vacuum regulator 18, throttle valve 19, check valve 20, pressure vacuum gauge 21, very
Air filter 22, solenoid valve 23, pressure transmitter 24.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing:
Embodiment one:
As shown in Figure 1 to Figure 3, the present invention provides a kind of sealing property detection device, can be used for detection and is mounted on EMU
The leakproofness of side window 2 on equal rail vehicle side walls 1.The opening of side window 2 is provided on side wall 1, side window 2 is by window skeleton 10 and vehicle
Glass pane 11 forms, and glass for vehicle window 11 generally uses hollow pair glass, and glass for vehicle window 11 sticks with glue on window skeleton 10, window
Skeleton 10 is mounted in the opening of side wall 1 by screw, after installation between 1 covering of the outer surface of glass for vehicle window 11 and side wall
Seam crossing is filled with sealant 12, for guaranteeing the air-tightness of side window 2.
Detection device includes pressure cabin 3, support device 4, pressure-regulating device and control system, and pressure cabin 3 is installed
In support device 4, pressure cabin 3 is fitted closely with 1 surface of side wall around side window 2 to be detected when detecting.Pressure tune
Regulating device is connect for adjusting and detecting the pressure in pressure cabin 3 with pressure cabin 3, and pressure-regulating device and control system connect
It connects, is uniformly controlled by control system.
In the present embodiment, pressure cabin 3 forms two relatively independent airtight cavities after being bonded with side wall 1, respectively
Detect cabin 6 and the cofferdam 7 in a ring around detection 6 periphery of cabin in center.As shown in Figures 3 to 5, pressure cabin 3 is by box
The shell 3a of shape and internal annular partition 3b composition, annular partition 3b surround the detection cabin 6 at center, and the area in detection cabin 6 omits
Greater than the area of detected side window 2, the cofferdam 7 of annular is surrounded between shell 3a and annular partition 3b.Pressure cabin 3 is preferred
Detection efficiency is improved to reduce the time that pressure is adjusted and detected using flat box-like structure.
It is fixed with a circle external seal strip 8 at the edge of shell 3a, is fixed in a circle and seals at the edge of annular partition 3b
Item 9.In the present embodiment, as shown in Figure 5 and Figure 6, external seal strip 8 has interconnecting piece 8a and clinch 8b, and clinch 8b is by connecting
Portion 8a is tilted towards outside and stretches out.Interconnecting piece 8a has T shape mounting groove, on shell 3a there is corresponding T shape to install convex block, the peace
The fixation for realizing external seal strip 9 in convex block insertion mounting groove is filled, is installed very simple and convenient.In order to guarantee sealing effect, may be used also
To smear sealant again between external seal strip 8 and shell 3a.When test, interconnecting piece 8a is pressed on the surface of side wall 1, simultaneously
Clinch 8b is overlapped on the surface of side wall 1, realizes double sealing effect.The structure phase of the structure of interior sealing strip 9 and external seal strip 8
Together, the stretching of clinch 8b is contrary.The setting of external seal strip 8 and interior sealing strip 9 can guarantee pressure cabin 3 in test
Leakproofness when being bonded with side wall 1 makes to detect to seal against each other between cabin 6 and cofferdam 7 and be isolated, and cofferdam 7 and outside air are close
Insulate from.The problems such as external seal strip 8 and interior sealing strip 9 are integrally formed using mold, avoid sealing strip seam crossing gas leakage.
Pressure cabin 3 has been separated into cofferdam 7 and detection cabin 6 by annular partition 3b, external seal strip 8 and interior sealing strip 9
Two cavitys.By two seals, atmosphere is reduced by sealing strip and enters a possibility that detection cabin 6 causes pressure to rise,
To keep the measurement of 2 leakproofness of side window more accurate.
As shown in figure 4, also distinguishing in detection cabin 6 and cofferdam 7 to improve the overall structural strength of pressure cabin 3
It is provided with strengthening rib strip 3c in length and breadth.In the present embodiment preferably, shell 3a, annular partition 3b and the strengthening rib strip of pressure cabin 3
3c preferably uses transparent acrylic board material, and blend compounds are bonded together.Acrylic board has the spy of light weight, appearance looks elegant
Point, while under the premise of guaranteeing structural strength, additionally it is possible to facilitate the case where observing side window 2 to be measured.
First gas connector 13 is installed on detection cabin 6, the second gas connector 14 is installed on cofferdam 7, the first gas connects
First 13 and second gas connector 14 connect with pressure-regulating device (not shown) by tracheae.Pressure-regulating device is being tested
Shi Yici adjusts cofferdam 7, detects the pressure in cabin 6.
In the present embodiment, pressure-regulating device is air extractor, i.e., by air extractor be detection cabin 6 and cofferdam 7 into
Row vacuumizes, and will test the pressure in cabin 6 and cofferdam 7 and is evacuated to negative pressure setup pressure value.It, can be with by the way of negative pressure
Be conducive to external seal strip 8 and interior sealing strip 9 be bonded with 1 surface of side wall it is even closer.
When detecting, first cofferdam 7 is vacuumized, the pressure in cofferdam 7 is down to the first setting initial pressure
Pc1 illustrates that 7 leakproofness of cofferdam is unqualified if cofferdam 7 can not be evacuated to the initial pressure of test requirements document, stops test.
If cofferdam 7 can be evacuated to the initial pressure of test requirements document, and can reach leakproofness Eligibility requirements within the dwell time, say
Bright 7 leakproofness of cofferdam is qualified, then vacuumizes to detection cabin 6, otherwise the unqualified stopping test of 7 leakproofness of cofferdam.It will
Pressure in detection cabin 6 is down to the second setting initial pressure Pc2, starts to test 2 sealing performance of side window.If checking cabin 7 not
It can be evacuated to the initial pressure of test requirements document, illustrate that side window 2 leakproofness in guest room is unqualified.If checking that cabin 7 can be evacuated to test
It is required that initial pressure, and 2 leakproofness Eligibility requirements of side window can be reached within the dwell time, illustrate that 2 leakproofness of side window is qualified,
Otherwise 2 leakproofness of side window is unqualified.
The detection device passes through the setting of cofferdam 7, and by way of being successively evacuated, can be convenient user and pass through sight
The pressure examined in cofferdam 7 rises situation, judges whether external seal strip 8 and interior sealing strip 9 have damaged situation.Cofferdam 7 is taken out
Gas can be evacuated to the initial pressure of test requirements document, and when reaching 7 pressure maintaining requirement of cofferdam, illustrate that 8 sealing performance of external seal strip is good
It is good.If cofferdam 7 cannot be pumped to the initial pressure of test requirements document or when pressure maintaining does not reach requirement, illustrate that external seal strip 8 is close
Sealing property destroys.When cofferdam reaches pressure maintaining requirement, if cofferdam 7 and detection 6 pressure difference of cabin are stablized, it was demonstrated that cofferdam
7 is completely separated by interior sealing strip 9 with detection cabin 6, and interior 9 favorable sealing property of sealing strip is at this time again evacuated detection cabin 6,
Start the test of 2 sealing performance of side window.It the case where if there is damaged gas leakage, is replaced at once, is conducive to the efficiency for improving detection
And accuracy.
As shown in figure 5, pressure-regulating device include vacuum pump 17, it is vacuum regulator 18, throttle valve 19, check valve 20, true
Hollow pressure gauge 21, vacuum filter 22, solenoid valve 23, pressure transmitter 24 form, and are connected between each component by air pipe.Very
Sky pump 17 is vacuumized simultaneously for detection cabin 6 and cofferdam 7, vacuum regulator 18, throttle valve 19, check valve 20, vacuum pressure
Power table 21, vacuum filter 22, solenoid valve 23, pressure transmitter 24 are then divided into two groups, be sequentially connected in series respectively vacuum pump 17 with
On the air pipe for detecting cabin 6 and cofferdam 7.By controlling the solenoid valve 23 in different gas circuits respectively to detection cabin 6 and cofferdam 7
It is vacuumized.Vacuum regulator 18 can make detection cabin 6, the suction pressure of cofferdam 7 more stable.21 He of pressure vacuum gauge
Pressure transmitter 24, which is used to detect, detects cabin 6, the air pressure in cofferdam 7.
In order to facilitate detection device is adjusted, support device 4 includes bracket 4a, mounting rack 4b and regulating mechanism, bracket 4a's
Bottom is equipped with travelling wheel, and 3 left and right adjusting of pressure cabin is realized by moving left and right bracket 4a.Mounting rack 4b is movably arranged on branch
On frame 4a, specifically, the two sides of bracket 4a is provided with sliding rail 4c, there is sliding slot (not shown), installation on mounting rack 4b
Frame 4b can be slided up and down along the sliding rail 4c of two sides.Regulating mechanism includes the elevating mechanism for adjusting 3 height of pressure cabin
15 and the incidence regulating mechanism 16 for adjusting 3 inclination angle of pressure cabin.
Wherein, elevating mechanism 15 uses lifting cylinder, and the bottom end of lifting cylinder is fixed on bracket 4a, and lifting cylinder is stretched
On the top mounting rack 4b of contracting bar, mounting rack 4b is driven to move up and down along bracket 4a.
Incidence regulating mechanism 16 includes upper and lower two and tilts forward and back cylinder, and one end of upper and lower two tilt cylinders is separately connected
In the top and bottom of pressure cabin 3, the other end is connect with mounting rack 4b, and two tilt cylinders are by controlling different strokes
To adjust the front and rear tilt angle of pressure cabin 3.
The support device 4, which can facilitate, the positions adjusting such as carries out upper and lower, left and right to pressure cabin 3, leans forward, swings back, and makes to press
Power cabin 3 according to the shape adjustment setting angle on 1 surface of side wall, meets the change of 2 field position of EMU guest room side window when detecting
The requirement of change, the surface of side wall 1 can be fitted tightly over by making pressure cabin 3 when detecting, guarantee detection effect, inspection also can be improved
Survey efficiency.
In the present embodiment, control system includes computer, controller, power supply, control panel etc., is adjusted for controlling pressure
Regulating mechanism etc. in device, support device 4.Power supply is that controller and control panel etc. provide power supply, and user can be according to need
Operate the button on control panel, by digital data transmission to controller, controller control again vacuum pump 17, solenoid valve 23,
The movement of lifting cylinder, tilt cylinders etc., the pressure signal that pressure transmitter will test again are transferred to controller, and user can
Each control parameter is inputted to operate computer, computer manually and automatically controls pressure-regulating device by software, examines
The result of survey can also be shown on computers, and directly generate report storage.One printer can also be installed again, it directly will inspection
The report printing for surveying result comes out.
The component of control system is all mounted in a control cabinet 5, and each component in pressure-regulating device is also mounted at control
In cabinet 5 processed, in order to which easy to operate computer also may be mounted at the top of control cabinet 5.Control cabinet 5 is mounted in support device 4,
It is mobile with support device 4, with convenient for users to operating with.
The detection method of the sealing property detection device is described below in detail, includes the following steps:
A, it will test device to connect with workshop power supply, gas source, adjust the installation site of pressure cabin 3, make pressure cabin 3
It is fitted closely with 1 surface of side wall around side window 2, starts to do the test of guest room side window sealing performance.
B, start pressure-regulating device in vacuum pump 17, by control system control pressure-regulating device, open with every
The solenoid valve 23 in gas circuit is connected from cabin 7, adjusts the pressure in cofferdam 7, until reaching the first setting initial pressure Pc1, is controlled
Solenoid valve 23 processed is closed, and stops vacuumizing for cofferdam 7.If the pressure during this in cofferdam 7 cannot be down to first and set
Determine initial pressure Pc1, then directly stops test.
Wherein, the first setting initial pressure Pc1 is preferably set to -4kPa.
When the pressure in cofferdam 7 rises to initiation pressure value Ps (preferably initiation pressure value Ps is -3.92kPa), open
Beginning pressure maintaining timing observes air pressure in cofferdam 7 and rises situation, and in detection process, Real time vision is detected in cofferdam 7
Pressure value, and the real-time pressure in cofferdam 7 is acquired and is handled.In pressure maintaining setting time t (preferably pressure maintaining setting time
T is 200 seconds) in, if the real-time pressure value P in cofferdam 7 reaches setting end pressure value P j, (preferably setting terminates pressure value
Pj is -3.45kPa), it is determined as that sealing performance is unqualified, terminates test.
If the real-time pressure value P in cofferdam 7, which is less than setting, terminates pressure value P j (- 3.45kPa), it is determined as cofferdam
7 sealing performance is qualified, continues testing procedure C.
In this step, user can judge external seal strip 8 and interior by the pressure changing in observation cofferdam 7
Whether sealing strip 9 has damaged situation.The pumping of cofferdam 7 can be evacuated to test requirements document, and when reaching 7 pressure maintaining requirement of cofferdam,
Illustrate 8 favorable sealing property of external seal strip.If cofferdam 7 cannot be pumped to test requirements document or when pressure maintaining does not reach requirement, say
Bright 8 sealing performance of external seal strip is destroyed, and is directly replaced.When cofferdam 7 reaches pressure maintaining requirement, if cofferdam 7
Stablize with detection 6 pressure difference of cabin, it was demonstrated that cofferdam 7 and detection cabin 6 are completely separated by interior sealing strip 9, and interior 9 sealing performance of sealing strip is good
It is good, if it is determined that 9 sealing performance of interior sealing strip is destroyed, then directly replaced.
C, in the case where judging external seal strip 8 and the unabroken situation of interior sealing strip 9, i.e., guaranteeing that detecting cabin 6 seals sternly first
In the case where close, start the vacuum pump 17 in pressure-regulating device, pressure-regulating device is controlled by control system, opens and examine
The solenoid valve 23 in the connection of cabin 6 gas circuit is surveyed, the pressure in detection cabin 6 is adjusted, until reaching the second setting initial pressure Pc2, is controlled
Solenoid valve 23 processed is closed, and stops vacuumizing for detection cabin 6.
If the pressure detected in cabin 6 during this cannot be down to the second setting initial pressure Pc2, illustrate side window 2
Leakproofness is unqualified, stops test.
Wherein, the second setting initial pressure Pc2 is preferably set to -4kPa.
When the pressure in detection cabin 6 rises to initiation pressure value Ps (preferably initiation pressure value Ps is -3.92kPa), open
Beginning pressure maintaining timing is observed and detects air pressure rising situation in cabin 6, in detection process, in Real time vision detection detection cabin 6
Pressure value, and the real-time pressure in detection cabin 6 is acquired and is handled.In pressure maintaining setting time t (preferably pressure maintaining setting time
T is 200 seconds) in, if the real-time pressure value P in detection cabin 6 reaches setting end pressure value P j, (preferably setting terminates pressure value
Pj is -3.45kPa), it is determined as that the sealing performance of side window 2 is unqualified, terminates test.
Terminate pressure value P j (- 3.45kPa) if detecting the real-time pressure value P in cabin 6 and being less than setting, is determined as side window 2
Sealing performance it is qualified.
After the completion of test, whether the sealing performance that software judges automatically side window 2 is qualified, and is saved with report form.
The detection device and detection method, it is easy to operate, quick, applicability is good, by being arranged again in the periphery in detection cabin 6
The structure of cofferdam 7, successively carries out pressure adjusting to cofferdam 7 and detection cabin 6, guarantees the pressure in detection cabin 6 using cofferdam 7
Power, while being conducive to whether auxiliary judgment external seal strip 8 and interior sealing strip 9 have breakage, it improves guest room side window sealing performance and sentences
Disconnected accuracy and detection efficiency solves the problems, such as that guest room side window can not accurately detect leakproofness because of sealant aging infiltration.
The present invention is conducive to evade in advance EMU and occurs side window roof leaking risk in operation simultaneously, improves overhaul of train-set quality, subtracts
Few vehicle side window repair time reduces the side window cost of overhaul after sale.
Embodiment two:
The difference is that, the present embodiment uses the side for apply to cofferdam 7 and detection cabin 6 positive pressure with embodiment one
Formula successively applies positive pressure to cofferdam 7 and detection cabin 6, respectively reaches positive pressure first and sets the setting of initial pressure Pc1 and second just
Beginning pressure Pc2, the first setting initial pressure Pc1 and the second setting initial pressure Pc2 are preferably 4kPa.External seal strip 8 and Nei Mi
The detection mode of strip of paper used for sealing 9 is the same as example 1.
After cofferdam 7 applies positive pressure, the pressure in observation cofferdam 6 drops to initiation pressure value Ps and (preferably opens
Beginning pressure value P s is 3.92kPa) when, start pressure maintaining timing, observe air pressure change situation in cofferdam 7, in detection process, calculates
Machine real-time display detects the pressure value in cofferdam 7, and the real-time pressure in cofferdam 7 is acquired and is handled.In pressure maintaining
In setting time t (preferably pressure maintaining setting time t is 200 seconds), if the real-time pressure value P in cofferdam 7 reaches setting and terminates
Pressure value P j (it is 3.45kPa that preferably setting, which terminates pressure value P j), is determined as that sealing performance is unqualified, terminates test.
If the real-time pressure value P in cofferdam 7, which is less than setting, terminates pressure value P j (3.45kPa), it is determined as cofferdam 7
Sealing performance it is qualified, continue testing procedure C.
After detection cabin 6 applies positive pressure, the pressure in detection cabin 6 drops to initiation pressure value Ps and (preferably starts to press
Force value Ps is 3.92kPa) when, start pressure maintaining timing, observe and detect air pressure change situation in cabin 6, in detection process, computer is real
When show detection detection cabin 6 in pressure value, and to detection cabin 6 in real-time pressure be acquired and handle.It is set in pressure maintaining
In time t (preferably pressure maintaining setting time t is 200 seconds), if the real-time pressure value P in detection cabin 6, which reaches setting, terminates pressure
Value Pj (it is 3.45kPa that preferably setting, which terminates pressure value P j), is determined as that the sealing performance of side window 2 is unqualified, terminates test.
When using positive pressure voltage drop method, entire pressure cabin 3 bears positive pressure, and bracket 4a also will receive a thrust pressure backward
When power cabin 3 is bonded with side window 2, external seal strip 8 compares the boosting of the negative pressure in embodiment one method with the deflection of interior sealing strip 9 more
Greatly, the pressing force needed is bigger than negative pressure boosting method.
As described above, the plan content in conjunction with given by attached drawing, can derive similar technical solution.But it is all not take off
Content from technical solution of the present invention, according to the technical essence of the invention it is to the above embodiments it is any it is simple modification, etc.
With variation and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of sealing property detection device, it is characterised in that: including pressure cabin, support device, pressure-regulating device and control
System processed, the pressure cabin are mounted in support device, when the pressure chamber physical examination is surveyed with unit under test palette after shape
At the detection cabin at center and around cofferdam in a ring all out of my cabin is detected, pressure-regulating device connect with pressure cabin and is used for
It adjusts and detects the pressure in detection cabin and cofferdam, the pressure-regulating device is connect with control system.
2. a kind of sealing property detection device according to claim 1, it is characterised in that: adjust the cofferdam and detection
The pressure in cabin includes vacuumize to cofferdam and detection cabin reaching negative pressure setting initial pressure value, or to cofferdam and detection
Cabin carries out application positive pressure and reaches positive pressure setting initial pressure value.
3. a kind of sealing property detection device according to claim 2, it is characterised in that: the pressure-regulating device is successively
Cofferdam, the pressure in detection cabin are adjusted to setting initial pressure value.
4. a kind of sealing property detection device according to claim 1, it is characterised in that: the support device includes branch
Frame, mounting rack and regulating mechanism, the mounting rack are movably arranged on bracket, and the regulating mechanism includes for adjusting pressure chamber
The elevating mechanism of body height and incidence regulating mechanism for adjusting pressure cabin inclination angle, the both ends of the elevating mechanism are pacified respectively
Dress bracket and mounting rack, the both ends of the incidence regulating mechanism are connected on mounting rack and pressure cabin.
5. a kind of sealing property detection device according to claim 4, it is characterised in that: the incidence regulating mechanism includes
Upper and lower two tilt forward and back cylinder, and one end of tilt cylinders is connect with pressure cabin, and the other end is connect with mounting rack, two inclinations
Cylinder adjusts pressure cabin front and rear tilt angle.
6. a kind of sealing property detection device according to any one of claims 1 to 5, it is characterised in that: the pressure chamber
Body is made of the shell and internal annular partition of box-like, and annular partition surrounds detection cabin, is surrounded between shell and annular partition
Cofferdam is separately installed with a circle sealing strip at the edge of shell and annular partition.
7. a kind of sealing property detection device according to claim 6, it is characterised in that: the pressure cabin is by transparent
Acrylic board bonds.
8. a kind of sealing property detecting method of such as described in any item sealing property detection devices of claim 1-7, feature
It is, includes the following steps:
A, the installation site for adjusting pressure cabin, is bonded pressure cabin with unit under test；
B, the pressure in cofferdam is adjusted to the first setting initial pressure Pc1, according to the pressure in cofferdam within the set time
Whether variation meets setting condition, and whether the leakproofness in detection and isolation cabin is qualified, and qualification continues step C, unqualified termination test；
C, continue to adjust the pressure in detection cabin to the second setting initial pressure Pc2, according in detection cabin within the set time
Whether pressure change meets setting condition, judges whether the leakproofness of unit under test is qualified.
9. a kind of sealing property detecting method according to claim 8, it is characterised in that: in above-mentioned steps B and C, setting
Condition starts pressure maintaining timing, in pressure maintaining setting specifically, when cofferdam or detection lock pressure power are changed to initiation pressure value Ps
Between in t, if the real-time pressure value P in cofferdam or detection cabin reaches setting and terminates pressure value P j, be determined as sealing performance not
Qualification is determined as that sealing performance is closed if the real-time pressure value P in cofferdam or detection cabin is less than setting and terminates pressure value P j
Lattice.
10. a kind of sealing property detecting method according to claim 8, it is characterised in that: adjust the cofferdam and inspection
The pressure for surveying cabin includes vacuumize the reach negative pressure first setting initial pressure Pc1 and second to cofferdam and detection cabin to set
Determine initial pressure Pc2, or apply the first setting initial pressure Pc1 and that positive pressure reaches positive pressure to cofferdam and detection cabin
Two setting initial pressure Pc2.
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| CN110068424A (en) * | 2019-05-15 | 2019-07-30 | 中车青岛四方机车车辆股份有限公司 | Railway carriage air seal test gas-tight door and air tight test method |
| CN111413033A (en) * | 2020-04-25 | 2020-07-14 | 深圳市恒义建筑技术有限公司 | Curtain wall air tightness detection device and detection method thereof |
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| CN112304538A (en) * | 2019-07-26 | 2021-02-02 | 中车唐山机车车辆有限公司 | Air tightness detection device and method |
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| CN110068424A (en) * | 2019-05-15 | 2019-07-30 | 中车青岛四方机车车辆股份有限公司 | Railway carriage air seal test gas-tight door and air tight test method |
| CN112304538A (en) * | 2019-07-26 | 2021-02-02 | 中车唐山机车车辆有限公司 | Air tightness detection device and method |
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| CN112798199A (en) * | 2020-12-31 | 2021-05-14 | 雅勃医药化工设备(江苏)有限公司 | Air tightness self-checking method for hyperbaric oxygen chamber |
| CN112798199B (en) * | 2020-12-31 | 2024-01-12 | 雅勃医药化工设备(江苏)有限公司 | Self-checking method for air tightness of hyperbaric oxygen chamber |
| CN113945338A (en) * | 2021-09-17 | 2022-01-18 | 青岛中车四方轨道车辆有限公司 | Rail vehicle body sealing performance test device and test method |
| CN113884374A (en) * | 2021-09-30 | 2022-01-04 | 中天科技海缆股份有限公司 | Submarine cable water pressure test cabin |
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