CN1932464A - Airtight type tested pieces air-leakage detecting device - Google Patents
Airtight type tested pieces air-leakage detecting device Download PDFInfo
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- CN1932464A CN1932464A CN 200610022013 CN200610022013A CN1932464A CN 1932464 A CN1932464 A CN 1932464A CN 200610022013 CN200610022013 CN 200610022013 CN 200610022013 A CN200610022013 A CN 200610022013A CN 1932464 A CN1932464 A CN 1932464A
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Abstract
The invention discloses a detecting device for the leakage of gas-tight test piece including the aqua storage tank of the watertight test piece and the air compressing device to fill the pressure to the gas-tight test piece and the measuring cup to collect the leaking gas. The aqua storage tank is connected with the test piece inside and the conduit of the air compressing device in outside which is installed with the stabilizing voltage device. The water storage vessel has a flooding pipe connected to the out and a measuring cup. The invention transforms the reverse scale reading of the original air volume to the forward scale reading of the liquid volume by the liquid drained by leaking gas of the closed test piece. Therefore, it can assure the coherence of the reading and the fact leaking quantity.
Description
Technical field
The present invention relates to a kind of device that in the unit interval, carries out the air leakage test with measuring cup collection air-tight test device leakage bubble volume size.
Background technology
Be used for impermeability experiment that high temperature clip 3HB6535-60,3HB6535-52, GJB3821/3/52, GJB3821/3/42GJB3821-99, GJB3579-99 carry out at present and, after part production, all need the air leakage test of installing as shown in Figure 2 the related experiment of parts such as pipe, joint, O-ring seal, switching mouth, hydraulic reservoir.The prior art test unit is to collect the size that goes out to leak bubble volume from high temperature clamp connection shown in Figure 2 with measuring cup in the unit interval.Its weak point is:
1. its adopts the tank tank of open type, collects the air leakage test that bubble carries out with anti-mouthful measuring cup, and to retain difficulty big in operation in practice, and bubble easily spreads, and vertically slightly promptly puts out.Bubble is collected air leakage data poor accuracy.Because after bubble leaks out from the high temperature clip, there is a certain amount of bubble to be attached to the outside surface and the measuring cup inwall of high temperature clip, do not concentrate in the measuring cup bottom, can cause measuring cup reading and actual amount of leakage not to be inconsistent.
2. to use measuring cup directly to read the data of air gas inaccurate for this device.Because it oppositely buckles into measuring cup in tank, operation inconvenience, lack of balance, reading accuracy is poor.
3. system's voltage regulating mode working pressure shakiness.Because the working pressure of compressed gas cylinder is 30 times～50 times of high temperature clip working pressure, the working pressure of high temperature clip has unstable factor, only realizes decompression by switch A, be difficult for adjusting, and influence test accuracy,.
4. poor stability.If it is bad that switch A adjusts, in case cause the interior working pressure of high temperature clip excessive, the high temperature clip breaks, the entail dangers to operator safety.
Summary of the invention
The objective of the invention is at prior art above shortcomings part, provide a kind of measuring cup reading to conform to actual amount of leakage, accuracy of reading, simple to operate, pressure regulation is convenient, safe and reliable, the reverse scale reading of volume of air can be converted to airtight type tested pieces air-leakage detecting device to the forward scale reading of the volume of liquid.
The technical scheme that the present invention solves its technical matters is, a kind of airtight type tested pieces air-leakage detecting device, comprise: with the aqua storage tank of watertight testpieces with to the air compression plant of airtight type tested pieces air pressurising, and the measuring cup of collecting watertight test part air leakage, it is characterized in that: described aqua storage tank is a tank by sealing cover sealing water test spare, connect in it on testpieces and the outside conduit that is connected air compression plant voltage stabilizing mechanism be housed, the tank tank have one with the measuring cup of extraneous run-down pipe that communicates and collection testpieces air leakage leakage bubble discharge tank liquid.
The present invention has following beneficial effect than prior art.
The measuring cup reading conforms to actual amount of leakage.Tank tank by water test spare leaks the liquid of the same volume that bubble discharges with airtight testpieces air leakage and will be originally the reverse scale reading of volume of air be converted to forward scale reading to the volume of liquid, has solved the prior art reading and actual amount of leakage is not inconsistent problem.And reading is more accurate, operates simpler easyly, and bubble collection method science is reliable.The bubble discharged liquid is reflected on the water discharge, has fundamentally guaranteed the consistance of measuring cup reading and actual leakage rate.
Pressure regulation is convenient, and is safe and reliable accurate.Experimental pressure is stable.By automatic voltage regulation mechanism (pressure modulating opening, reduction valve), to the force value of all size, convenient accurately guaranteed the accuracy of test, can avoid in the Yin Gaowen clip working pressure excessive and destroy the high temperature clip; Guarantee operating personnel's safety.Experimental facilities of the present invention has solved domestic long-term lacking special purpose test equipment puzzlement, can be used as air leakage test specialized equipment.
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is mainly used in the aufbauprinciple synoptic diagram of high temperature clip air leakage test for tightness test spare gas leak detection device of the present invention.
Fig. 2 is prior art airtight type tested pieces air-leakage detecting device schematic diagram of structure figure.
Embodiment
Fig. 1 has described a most preferred embodiment of the present invention.Mainly comprise aqua storage tank 13 with the watertight testpieces, to the air compression plant 1 of airtight type tested pieces air pressurising be used to collect the measuring cup 21 of watertight test part air leakage.Air compression plant can be to be filled with compressed-air actuated gas cylinder, also can be the compressed air source unit from air compressor machine.The aqua storage tank 13 of making tank is shaped on the sealing cover 15 that bolt 18 is led to and passed through to sealed port.In the aqua storage tank that water 14 is housed 13 that places by the testpieces of water-stop during test, and form the space of a sealing.Testpieces 12 connects inner catheter 11, and connects air compression plant 1 by connecting outside outer catheter 10.Voltage stabilizing mechanism is housed on the outer catheter 10, and this stable-pressure device mainly comprises the reduction valve 5 on the path that is connected conduit 6 gases and can steadily regulate the pressure modulating opening 7 of force value.Automatic voltage regulator by reduction valve 5 and pressure modulating opening 7 combine and form can guarantee accurate and stable experimental pressure.But the exhausr port 9 of gas and show the tensimeter 8 of force value in the pipeline in the discharge conduit after on the path of conduit 6 gases, also being connected with experiment and finishing.Pneumatic shuttle 1 links to each other with air inlet switch 3 by conduit 2.3 air inlets of may command pneumatic shuttle 1 in pipeline of air inlet switch.Air inlet switch 3 communicates with reduction valve 5 by the path of conduit 4 gases, with when air pressure is too big, steadily discharges gas.Groove tank or aqua storage tank 13 are connected with and the extraneous run-down pipe 19 that communicates.Run-down pipe 19 is installed in aqua storage tank 13 sides, and it is placed with one down and collects the measuring cup 20 that the testpieces air leakage is leaked bubble discharge tank liquid.
Side, aqua storage tank 13 bottom be shaped on can water filling in it water inlet pipe 22 and water inlet switch 23.Be positioned at flap 15 upper ends and be shaped on the exhausr port 17 that is communicated with aqua storage tank 13.When water filling in aqua storage tank 13, can equate with atmospheric pressure to guarantee the air pressure in the aqua storage tank 13 by opening the gas in the 17 exhausr ports discharge aqua storage tank 13.After water filling finishes, close exhausr port 17, can guarantee the impermeability of aqua storage tank 13 except that run-down pipe 19.When experiment is carried out, in experimental piece 12, there is gas to discharge, when forming bubble 16, can measures the volume of drainage water 21 by measuring cup 20 by the water of run-down pipe 19 to measuring cup 20 discharge equal volume.After experiment finishes, can be by the water 14 in rising pipe 25 that is installed in aqua storage tank 13 sides and the effluent switch 24 discharge aqua storage tanks 13.
Principle of work of the present invention is, experimental piece is placed in the tank (being aqua storage tank), when in the experimental piece during gassy, if any leakage, has gas and discharges, and forms bubble.Because tank inside is airtight, has only a run-down pipe to communicate with the external world, bubble can't be discharged tank, but by run-down pipe the water drainage water concentrated flow of equal volume is gone in the measuring cup.The volume of amount water in the cup is exactly the air leakage of experimental piece.The accuracy of experimental pressure is regulated assurance by the pressure modulating opening and the reduction valve of automatic voltage regulation mechanism.
During use, close water inlet switch, the notch of fetching boiling water lid and drainage switch emit water; Cleaning sink.Experimental piece, exhausr port, tensimeter, pressure modulating opening, reduction valve, source of the gas are coupled together.Experimental piece connects the impermeability that each interface is checked in the back by the ozzle in the tank.Close tank flap and drainage switch then, exhausr port switch and water inlet switch that the notch of fetching boiling water covers, water filling in tank; After run-down pipe has water to overflow, close exhausr port switch and water inlet switch.
Measuring cup is placed under the run-down pipe mouth of pipe, opens gas source switch to the experimental piece pressurising, and pick up counting.To the regulation experimental period the time, remove measuring cup, close gas source switch, the exhausr port switch that the notch of fetching boiling water covers is opened drainage switch, and water is emitted; Open the exhausr port switch in tensimeter the place ahead, the gas in the experimental piece is drained; Experimental piece is taken out from tank.By the volume (air leakage) of experimental piece bubble drainage water in the measuring cup, compare at last, draw experiment conclusion with the air leakage of requirement of experiment.
The experimental facilities scope of application of the present invention is wider, can carry out the impermeability experiment, the breaking pressure experiment; After finishing, many experiments all require to do the impermeability experiment, as vibration experiment, withstand voltage experiment, crooked fatigue experiment, pressure cycling experiment; Also be applicable to the test of standardized element (HB, GJB high temperature clip), pipe, joint, O-ring seal, switching mouth and 0.2～10MPa experimental pressure value.
The present invention through high temperature clip 3HB6535-60,3HB6535-52, GJB3821/3/52, GJB3821/3/42 are carried out the impermeability experiment and the part experiment of aircraft and use proof, comparable prior art experimental facilities hundreds thousand of circles of economizing on the use of funds.
Claims (3)
1. airtight type tested pieces air-leakage detecting device, comprise: with the aqua storage tank of watertight testpieces with to the air compression plant of airtight type tested pieces air pressurising, and the measuring cup of collecting watertight test part air leakage, it is characterized in that: described aqua storage tank is a tank by sealing cover sealing water test spare, connect in it on testpieces and the outside conduit that is connected air compression plant voltage stabilizing mechanism be housed, the tank tank have one with the measuring cup of extraneous run-down pipe that communicates and collection testpieces air leakage leakage bubble discharge tank liquid.
2. according to claims 1 described test unit, it is characterized in that: described tank tank is equipped with exhausr port switch and water inlet, drainage switch.
3. according to claims 1 described test unit, it is characterized in that: described voltage stabilizing mechanism comprises and is connected supravasal automatic voltage regulator and reduction valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100220134A CN100516804C (en) | 2006-10-06 | 2006-10-06 | Airtight type tested pieces air-leakage detecting device |
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|---|---|---|---|
| CNB2006100220134A CN100516804C (en) | 2006-10-06 | 2006-10-06 | Airtight type tested pieces air-leakage detecting device |
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| CN1932464A true CN1932464A (en) | 2007-03-21 |
| CN100516804C CN100516804C (en) | 2009-07-22 |
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