DE2025720A1 - Method for testing the tightness of an open container and device for carrying out the method - Google Patents

Description

y4 »Avenue de Villiers, 75, Paris (France)

Method for testing the tightness of an open container and device to carry out the procedure

The invention relates to pressure tests to test the tightness of open containers, for example the housings of electrical transformers.

The known methods and devices for implementation such trials require a long trial time and are difficult to apply when a large number of trials are carried out must be carried out, for example when testing containers that are manufactured in series, and for those .the tests must be carried out in the production chain itself.

With the known measures, it is necessary to fill the container resting on its bottom with a liquid, so that after the end of the experiment it is necessary to empty the container, for example by means of a siphon effect. There is therefore a risk of being on the ground some liquid remains in the container that is difficult to remove.

Lei / ba

109808/1253

The aim of the invention is to provide a method in which this disadvantage does not occur.

The method according to the invention for testing the tightness a container, in particular a transformer housing, is characterized in that the container is reversed placed on a tight closure device and pressed against the closure device that the container is completely filled with a liquid under a certain pressure through the tight closure device is introduced through from the bottom up into the container that the leakage of liquid from the container is checked, and that the container is checked from top to bottom through the closure device, is emptied.

A preferred embodiment of a device for Carrying out this method includes a support which supports a table which is provided with a sealing set of closed contour, the is intended to receive the tape of the opening of the inverted container to be tested, with the sealing set sufficient width to accommodate a range of containers with different openings has, a barrel arranged under the table, which forms a tight cavity through the sealing set opens upwards, a device for introducing a liquid under pressure into this cavity and to Removal of the liquid from this cavity and a device arranged in the cavity for evacuation and admission of air carried by a swimmer connected to the bottom of the Barrel is connected "

109800/1253

The invention is illustrated by way of example with reference to the drawing described. Show in it:

Pig.1 is a schematic sectional view of the device to carry out the process according to the invention in the rest position,

Pig.2 an enlarged representation of the Schwicaer and the various related organs and

Pig. 3 shows the device while a test process is being carried out.

The embodiment shown in the drawing of a device for carrying out the inventive Method includes a carrier resting on dec Eode α 1, which carries an essentially horizontal table 2, which practically forms the upper wide edge of a barrel 3, which has a cassiven bottom 4 and one Served Hohlraun 5 forms, the at table 2 in one wide opening 6 cits. Rings un this opening 6 is the 'lisch' 1 is a gasket set 7 from Gucai or any other suitable material that has a closed outline and a considerable width, so that it is able to cover an entire area of Bphältern to be tested cit different openings to take up ..

The table and the gasket are so obsessed that ; any container to be tested C so reversed can be applied to the table that the edge 8 the opening 3 of the container can rest completely and tightly on this wire harness regardless of the dimensions of this opening in the debossed Boreich.

109808/1253 bad original

The tight cavity forming barrel 3 is through Devices for supplying a liquid and for emptying this liquid as well as by devices for evacuating the air when filling and for letting in air when deflating.

For the introduction and removal of the liquid, an opening 10 is made at the level of the base 4 and is connected to a three-way valve 12 via a line 11. The three-way cock enables the line 11 to be connected _{to the lower part of a liquid storage container 13 either via a line H 9} in which a pump 15 is arranged, or via an emptying line 16 to any point of this liquid storage container.

A float 17 is arranged in the interior of the cavity 5 in the barrel 3 for the inlet and outlet of external air. Are the S _c hvoimaer carries a tube 18 which forms a swan "neck 19 which terminates in a Ventilkaotner 20, mounted in the air inlet openings 21 ,, These Ventilkatamer 20 communicates with the interior of the tube 18 via an opening 22 in compound is provided with a downwardly directed valve seat 23, on which a ball 24 can lie, the density of which is so obsessed that it floats on the test fluid teano ₉ when it is lifted by the fluid, as will be described later «,

The end of the tube 18 lying under the float is connected via an extendable, for example, zieharraonite-like folded tube 25 to an air outlet opening, which is attached to the bottom 4 of the sun 3, and to which an air outlet tube 27 is connected, which is above the Floor in the free space oüofiet _ö

(S) H <5 |

The plant is provided by a device 28 equipped with a screw spindle or a similar device provided, which makes it possible to press the vessel to be tested C onto the sealing set 7.

This device works in the following way: The
Vessel to be tested C is reversed with splash 8
its opening 9 on the sealing assembly 7 of the table
2 placed, whereby the entire of the bucket 3 and the
Vessel O is sealed tightly.

A preferably colored or even better fluorescent test liquid L is located in the liquid storage container 15 in an amount which is greater than the volume
of the Enclosed Space specified above, that is, as
the sum of the volumes of the cavity 5 and the vessel C.

The three-way valve 12 is brought into the position shown in Figure 3, and the pump 15 is started. The liquid reaches the lower one via lines 14 and 11
Part of buoy 3 »in which it gradually rises. Of the
The float rises with the liquid and the air can escape via the openings 21, the opening 22 released by the ball 24 and via the lines 18, 25 and 27.

Filling continues; once the liquid is over
the opening 6 of the barrel has risen out, it gradually fills the vessel G, the air being expelled further on the route indicated above.

At? At the end of the filling process, the float 17 is stopped in the position shown in FIG. As the liquid continues to rise, "she lifts the ball 24 aa that üqü Ventilsits 23

109808 / 125-3

locks. From then on, the van is complete the tub 3 and formed by the vessel 0 Raura.voai Aussenraua, and the pump 15 allows _s in this space the desired ti. To train test pressure,

If daa G @ fäge nioh.t vollkoiBman "lioiit is due to poor welding points between the wall parts, fluid discharges from _s and since these preferably fluorescent least colored or ₉ enables a directed on all critical points in light beam F is the instantaneous determination of leaks"

After completing the test procedure, the three-way valve 12 is used to empty the bottle C. The fluid flows through the drilling lines 11 and 16 into the fluid reservoir 13? where the ropes 11 _P 12 ₉ 16 aano form a siphon _s the öaroh the emptying of the liquid ■ from the; Vessel C started automatically

While äes Sntleerens the! Fluid is replaced by air j entering and via the lines 27 and 25 can freely einströcaen into the vessel G _g because from the start of emptying the Yentilkugel 24 in the Ventilkatuffler 20 oaoh goes down and the opening 22 frees »

The emptying is continued until the liquid level has fallen to the bottom of the rope ₈ ton deüo it is not necessary ,, ton swischeo the running test procedures to complete. empty, *

In contrast, the vessel C is completely emptied; There is no drop of acidity left in it _{or the like}

After emptying the Gefässes.G the Prüfαng is beesfist _s if k @ ine Uaäiohtigkeit is oosoea found _o if wli'ä the Uodio! Itigi € © it immediately bsfeofeos issfl © ise s g äurchg @ leads _o

It is easy to see that the entire process takes place very quickly and that the vessel is then ready for the next production step. The test system described can therefore be inserted into the production chain.

Of course, emptying is by means of a siphons'our given as an example. It can also be emptied directly through the natural gradient into the storage container 13 take place, meanwhile the barrel 3, the storage container 13 and the three-way valve 12 can be arranged at a suitable height.

Instead of a ccehr or less deep ¥ orratsbdiilters 13, a pressure reservoir tank 13a (Figure 3) are used, the cited by the natural fall zez desired test pressure via a line 11a UNAE the three-way valve 12 ir "the antenna 3 emptied" while the liquid when emptying is returned by a Puape 15a, which sucks in from the sun via the Sreivtegehahn 12.

Of course, several devices can also work in parallel Reservoir 13a are supplied, then emptying every! ton is placed in a lower-lying container, from which the Puape 15a sucks, the liquid in to reclaim the reservoir 13a.

Claims

109808/1253

BADORLGiNAL

Claims (7)

Godfather claims 1J procedure for testing the tightness of a container, in particular a transformer housing, characterized in that the container is reversed to a tight closure device placed and against the Closing device is pressed that the container completely with a pressure under a certain pressure Liquid is filled, aie through the tight closure device is introduced into the container from the bottom up through it, that the escape of! liquid from the Container is checked, UBä that the container from top to bottom emptied below through the closure device., is. 2. The method according to claim 1, characterized in that the Emptying the container on the basis of the natural gradient he follows" 3. The method according to claim 1 or 2, characterized in that a colored liquid is used. 4. The method according to claim 1 or 2 _S, characterized in that a fluoreassieretsde liquid is used «, 5. Device for testing containers according to the method according to © ineo of claims 1 to 4? characterized by a support (1), which carries a table (2) provided with a sealing device (7) of closed outline which is intended to receive the fies edge (8) ″ of the opening (9) of the inverted container to be tested (C ) is determined, whereby the dissolution set (7) eioe sufficient width for the Auf Sabine © Ims gsosen area ir with different openings, a barrel (3) arranged under the table (2) which has a tight cavity (5) forms that through the sealing set (7) upwards opens, a device (10 to 15 or 13a to 15a) for Introducing a liquid under pressure into this cavity (5) and for removing the liquid from this cavity and a device (18 to 27) for evacuating and admitting air, äie v © n a float (17) is carried by an extendable Sahlauch (25) is connected to the bottom (4) of the 0> onne (3), 6. Device NaOH to claim 51 characterized in ä & us the device (10 to 15) sum introducing fluid under pressure into the cavity (5) and for removing the liquid from this Einan liquid reservoir (13) Contains, which, under the height of the table ( 2) is located as well as a pump (15), which sucks in from this liquid reservoir (13) and conveys it into the cavity (5), and a three-way valve (12) is provided between the pump (15) and the cavity (5) which connects the cavity in one position to the pump and in another position to the upper part of the liquid reservoir » 7. The device according to claim 5, characterized in that the device for introducing the liquid under pressure in the cavity (5) and for removing the liquid from this contains a pressure vessel (13a) which is directly emptied in öenHohlrauflj, as well as © ine pump (15a), which at Emptying from the cavity (5) or from a recessed area. sucks in lying liquid container and in äen pressure vessel promotes ·. - 109808/1263 8 * device each iron of claims 5 gekennzeichnetj to 7 »that the Sohnisraer (17) K _u gei ¥ alve (24), is AEAs scshwiiaaifähig arranged aiiä uater a valve seat (23) _ff dsr rlßgs on a Lafteinlass = un & - , Outlet äff BEQg (22) aog @ bra © hi5 iet _B uöö öass Si® 'opening (22) over äea YeiA'ängesh & VQü Sefeiaaela (25) pit © io © ^ Luft ©! As es ™ and -auslassleitiißg (27) Tesbußfieo _{8 is} connected with i @ ii at Boäeo (4) ä © r föiiQ® C3) lying area EMq (26) äes TerX-tangible Schlanchs, is © ο> y