DE3337197A1 - Valve for pressure containers, for example compressed-gas cylinders - Google Patents

Abstract

In a valve for pressure containers, for example single-way compressed-gas cylinders, which consists of a valve housing (2) which is placed on the container, of a valve body (1) which can be moved therein by means of a handle, and of an outlet for the extraction o the fluid container contents, a valve element (5) is provided in order to prevent refilling of the container once it has been completely emptied, which valve element (5) can be moved from a fixed open position by means of an aid which acts from the outside, for example a mandrel or the like which can be moved irreversibly into a position in which it remains in the open position subject to the container pressure, while it is moved out of this position into a locking position in the event of an overpressure acting from the outside and/or under the influence of an auxiliary force, for example a spring force. In one preferred configuration, the valve element (5) is constructed in the manner of a ball non-return valve, whose ball is fixed in the open position, by means of a blocking element (6), before the action of the aid, for example a mandrel, and is released after filling, possibly with partial destruction of the blocking element (6), so that it rests in a sealing manner on the valve seat (5) in the event of an external overpressure. <IMAGE>

Description

PATENT AGENT. ".:." -. "" .- ■ - "

dr.ing. HANS LICHTI * * 1337197

ut-iMCD II / ~ UT r ° - ⁷⁵⁰⁰ KARLSRUHE 41 (GRÖTZINGENJ

DIPL-ING. HEINER LICHTI durlacher strasse 31

DIPL-PHYS. DR. RER. NAT. JOST LEMPERT 'TEL .: (07 21) <8511

John A. van der Sanden 6978/83-Le

Postbus 7554 'October 12, 1983

NL-5601 JN Eindhoven

Valve for pressure vessels, e.g. pressurized gas cylinders

The invention relates to a valve for pressure vessels, e.g. pressurized gas cylinders, consisting of a valve housing placed on the container, a valve body movable therein by means of a handle, an outlet, e.g. for withdrawing the fluid contents of the container, and a valve element for blocking the valve under external pressure after an initial filling.

The invention is particularly concerned with such pressure vessels, which come on the market as one-way containers and after complete Removal of the contents per se should no longer be used. · Such disposable containers come, for example, in the form of Pressurized gas cylinders for refrigerants on the market. Practice shows that despite the labeling of these containers as disposable containers another attempt is made to refill these containers via the connector. This is especially critical when filling with too high pressure happens, or the container is filled with another fluid to which neither he nor the valve material or material are structurally coordinated.

COPY

From US-PS 3,985,332 a generic valve is already known, in which a valve element is held axially movable to a limited extent in the valve body. The valve body can over an actuating ring surrounding it and the valve housing, which has a screw thread which is connected to a screw thread of the Venti! Housing cooperates, can be adjusted axially. For first filling the valve body, over the actuating ring in such a way held high position via an inlet channel of the valve housing from the pressure vessel to be filled that the valve element, which is below the filling pressure in its lowest relative to the valve body and through this limited position is pressed, yet the inlet to the Leaves channel leading to the pressure vessel. After filling it will be Actuating element and thus the valve body weiter.vom the inlet channel screwed down. A spring jumps over a shoulder into an enlarged ring area of the ring element, so that this can no longer be brought into the original initial fitting can. When the fluid is removed from the pressure vessel, the valve element is pressed under the pressure of the exiting fluid in its remote position from the outlet channel in the valve body, so that the fluid can escape freely. If now a refill attempt is made is, the valve element is pressed under the pressure acting from the outside against the mouth of the inlet channel and closes this, because the valve body is seated deeper in the valve housing and at least not without further ado due to the locking ring spring can be unscrewed.

The well-known valve is "complicated and expensive to manufacture educated. In addition, there is a risk that under the action of force, especially taking into account existing tolerances, the valve body and the valve element which is axially movable to a limited extent in it is moved out of the valve housing via the actuating ring,

COPY

that refilling is possible.

The invention is therefore based on the object of providing a valve of the generic type Art to create that is easily developed, easy to manufacture and reliable refilling of the container after it has been emptied prevented.

This object is achieved according to the invention in that a blocking element it is provided that the valve element is suitable for the initial filling to hold a pressure vessel first in a fixed open position and that the valve element overcoming the blocking element can be brought into the position on which it is in the open position under the container pressure, but under the action of an external overpressure and / or the action of an auxiliary can automatically be moved into the locked position.

The valve element initially fixed in its open position allows open container valve allows the container to be filled in the intended manner Art. When the container is filled to the required pressure, the container valve is closed. Thereby or afterwards brought the valve element from the fixed open position into a, for example, unstable position (preferably with the action of an auxiliary force). This process is irreversible, i.e. the valve element can then never be brought into the fixed open position. These The valve element assumes an unstable position in the operating position of the valve a. If the container valve is opened to remove fluid, so can the container contents flow out in the usual way via the connector, since the valve element in the possibly unstable position is already in is in the open position or in such a position Effect of the tank pressure is pushed. Has the container been emptied? and if an attempt is made to refill it, the valve element is moved into its blocking position under the action of the excess pressure from the outside, so that the fluid cannot pass into the container. The valve element works

_ 4 _ finpv

then as a shut-off device against renewed filling. There is no need to keep the valve element open for subsequent filling from the outside possible. A refill attempt could at best be under more visible Destruction of the valve. The movement of the valve element into the blocked position may only be due to of the externally acting overpressure. Such pressure may occur, for example, during an attempt to refill the container occur as a result of the vapor pressure of the filling medium present as a liquid, such as a cooling liquid. In such a The case is when the gas pressure outside the container and the ambient pressure is the same as the internal pressure of the container, the liquid pressure of the coolant that has just been pumped in, close the valve. In addition, auxiliary facilities can also be used be provided, such as a spring or a magnet of a magnetic valve seal, which serves as a shut-off device Instead of or in addition to the ambient pressure acting from the outside, the valve element can push it into its blocking position, ie it to the Press the valve seat against it.

According to a preferred embodiment of the invention it is provided that when an aid acts, the blocking function of the blocking element to block the same in an open position for initial filling is irreversibly canceled, so that when there is an excess pressure acting from the outside, the valve element becomes a valve seat creates a seal.

This embodiment is therefore one under pressure switching valve, but its valve element until completion the first filling is fixed in the holder in the open position, so that the Filling is not hindered in any way. After completion of the filling process, an optional one is given by means of the aid Holding function of the blocking element is at least partially canceled or at least partially destroyed, or the blocking -

element overcome by the valve element, so that the valve element is released by the blocking element and can now switch under pressure to a limited extent. For example, the Move the valve element in response to the pressure on both sides, i.e. the container internal pressure and the external pressure. In the event that the pressure acting from the outside is greater than the pressure inside the container, the valve element will then engage in the valve seat with the formation of a sealing closure.

It is preferably provided that the acting aid comes from outside of the valve attacks, for example as an externally actuated valve body. In one embodiment, the tool has a On the inside of a dome on the connecting piece. Baren cap is arranged. The cap can under Screwed or otherwise attached to the connector. Since such a cap is usually only after the filling process is placed on the connector, the arrangement of the mandrel on the closure cap has the advantage that the destruction the holding of the shut-off member on the one hand does not happen untimely and on the other hand - as in the aforementioned embodiment - in none Case is forgotten.

In a particularly preferred embodiment of the invention it is provided that the valve seat and the valve element in the manner of a ball check valve are designed in which the ball before the actuation of the aid to cancel the holding function of the holder in the relevant Bracket is fixed or otherwise secured. A preferred bracket has one for the valve element. provided passage channel, the one on the side of the bracket facing the valve seat has a free one Has cross section which is smaller than the free cross section on the side of the holder facing away from the valve seat and is also smaller than the cross section of the valve element. This narrowing of the through canal at the exit in the direction of the valve seat ensures that the closure element is blocked in the open position by the holder.

copy

In particularly preferred embodiments it is provided that the free Cross-section of the through-channel of the bracket along the path continuously decreases in the direction of the point at which it is initially the closure member is or has found in its fixed open position runs towards the valve seat. With this execution then the valve element by means of the relevant tool, such as the Doms, pushed through the more or less elastically widening passage channel. This process is due to the elastic Widening of the through channel irreversible; after the valve element has emerged from the outlet of the through-channel, the ball can do not re-enter this.

In other embodiments it is provided that the holder has a plurality of ribs projecting radially into the through-channel for holding the closure member. It is provided that the ribs at Exercise their holding function are arranged between the valve seat and the valve element. The closure member is in the fixed open position the ribs from the outside. When the aid acts, the closure member is pressed through the ribs. Deform in the process the ribs are both elastic and plastic, depending on the material used. It proves to be particularly advantageous if the bracket including the ribs are made of plastic. The valve element is preferably made of hard, inelastic material such as metal. The closure member is preferably designed in the form of a steel ball. Alternatively, if the blocking element is an annular extension of the housing, the valve element is made of elastic plastic, optionally with bendable ones Be poor.

In preferred embodiments it is provided that the ribs are exclusively are arranged in the area of the outlet of the through channel facing the valve seat. This ensures that in the starting position the ribs prevent the ball from being subjected to pressure from

outside, ζ. B. the filling pressure reaches the valve seat. After this Filling process, the ribs can be deformed or destroyed particularly easily by mechanical pressure with the aid, see above that the ball can pass through the ribs.

It is provided that the ribs by the action of the aid are at least partially deformed to release the closure member. The aid is advantageously designed so that it at least on the ball, if necessary. can also attack the ribs, so that the ball can be pushed through the ribs. The aid is preferably one that can be introduced into the connecting piece Mandrel. In preferred embodiments it is provided that the blocking element is designed as a ring arranged in the connection piece is. Ribs are advantageously arranged on the inside of the ring. The ring or the holder can be attached to the valve seat be attached or the valve seat can be formed as an integral part with the blocking element. Preferably one is Part made of plastic. However, the choice of material largely depends on its compatibility with the particular bottled product Fluid.

In an advantageous embodiment it is provided that the valve element is under the action of an auxiliary force urging it against the valve seat. The auxiliary power device can be a spring or a magnet be magnetic valve seat. The possibly. provided spring gives the ball at the same time a certain guidance within the connecting piece.

Further advantages and features of the invention emerge from the claims and from the following description, in which several modified Embodiments of the invention are explained individually with reference to the drawings.

It shows or shows: ^ ^ ^ ^ 7 1 9

Fig. 1 is a section (partly with a schematic representation)

of a valve according to the invention with a valve part in the fixed open position;

2 shows a section (with a partially schematic representation)

of a valve according to the invention with the valve part after this irreversibly into its unstable Situation has been brought;

3 shows a partial view of the section within the circle A.

in Fig. 1;

FIG. 4 shows a section of the holder shown in FIG. 3,

here with irreversibly deformed ribs;

Fig. 5 is a plan view of the embodiment of the holder

in Fig. 3 below;

6 shows a plan view of the embodiment of the holder

in Fig. 3 above;

Fig. 7A each a section of a holder at a p. _ _R embodiment according to the invention with a through-channel with a continuously decreasing diameter;

8 A partial views of a further ._. _ _o Execution, with the bracket and ball seat as a rig. ö ti

only part are formed.

33TTIä7

9 shows a further embodiment of the invention

Valve with another valve element;

FIG. 9A shows a longitudinal section through a further embodiment of the valve according to the invention with another valve element;

FIG. 9B shows a plan view of the valve element of the embodiment according to FIG. 9a'- ,

⁹ * ^an embodiment similar to the embodiment in FIG

of the valve according to the invention with a further vent I-. element; and

FIG. 10A shows a longitudinal section of a configuration similar to that of FIG

Design of the valve according to the invention with a Another valve element, only the left half of the section is shown, since the right half is identical;

FIG. 10B shows a plan view corresponding to FIG. 9b of the valve element

the embodiment according to Figure 10a, also only the left half the representation; and

FIG. 11 shows a similar representation as in FIG

another embodiment of the valve according to the invention.

B representations corresponding to the representations in FIGS. 10a and 10b the right half of a further embodiment of the valve according to the invention.

Copy '- 9a-

HCTf "-; :: τ

In the drawings the container is itself, e.g. the pressurized gas cylinder or the like. Not shown. On the container sits a valve housing 2, the if possible permanently connected to the container, for example welded on.

Inside the valve housing 2 there is a valve body 1, which with a spindle or other handle (not shown) is raised from the closed position shown in the drawing into an open position can be. In the embodiment shown, there is a connection piece 3 on the side of the housing 2 and a valve seat 4 or 9 therein educated. These are preferably non-detachable fastenings. The connection piece 3 has a shown in dashed lines in the figure External thread for connection to hoses, lines or the like. on. Furthermore, the outermost end 15 of the connection piece 3 is designed as a sealing seat.

The valve seat 4 or 9 arranged within the connection piece 3 is designed in the form of a conical seat. Inside the connector 3 there is also a closure member, for example a ball 5. The ball. 5 is preferably made of steel, but can also be made of plastic exist. The ball 5 is kept free by means of a holder 6 in a hole or the flow cross-section of the connecting piece 3-

- 10-

the position, an open position, fixed. The bracket 6 consists of a Ring with a central opening through which the closure element, for example a ball 5, from the fixed open position irreversibly into the unstable operating situation is printed. Preferably are on the inside of the through-channel radial ribs are arranged, as can be seen in the brackets 6a and 6b shown in FIGS. 3, 5 and 6.

In the one shown in Fig, 3 above (in section) and Fig. 6 (in front view) Bracket 6a, the inside of the central opening at the outlet facing the valve seat 4 or 9 is covered with ribs 11, which are designed as pointed teeth protruding radially into the central opening. As can be seen from Fig. 6, the ribs 11 are on points attached along the circle 19 drawn in dashed lines, which represents the passage channel for the ball 5 through the holder 6a. To this one Through holes 23 leading through the holder 6a are also arranged around the central opening in order to provide an elastic expansion the passage channel to support the passage of the ball.

In the embodiment of the holder, shown below (in section) in Fig. 3 (in section) and in Fig. 5 (in front view), denoted by 6b, axially extending, regularly spaced axial ribs 11a are arranged on the inside of the central through-channel. At their axial end section at the outlet of the passage channel facing the valve seat 4 or 9, the axial ribs 11a are provided with pointed ends 11b which protrude radially into the passage channel. The starting points of the ribs 11 lie on a circle 21, which is shown in dashed lines in FIG. 5, and extend beyond a circle 19 also shown in dashed lines. The circle 19 indicates the diameter of the ball 5 to be used as the closure element. To push the ball 5 through the holder 6b, the ball is pushed against the ribs 11a. Since the pointed ends 11b of the ribs 11a protrude beyond the circle 19 corresponding to the diameter of the ball 5 and thus protrude into the passage of the ball 5, the ribs are deformed when the ball passes through. COPY

- 11 _

In the fixed open position, the ball rests on the ribs 11 or the pointed ends 11b of the ribs 11a from the outside, e.g. hold the Ribs 11 and the pointed ends 11b remove the ball 5 from the valve seat 4 or 9 remote. The ball remains in this position until the filling process is completed. During this filling process, the Medium via the connection piece 3 and the free space between the ribs 11 via the valve seat 4 and the valve housing 2 in penetrate the container. The ball 5 is shown in FIG. 1 in its initial position.

The ball 5 can optionally additionally under the action of a compression spring 7, which on the one hand, as shown at 17 in Fig. 1, on a corresponding abutment in the connection piece 3, on the other hand is supported against the ball 5 and this at the same time offers a certain guidance.

The support surface of the valve seat 4 can be used to form a magnetic Conical seat 9 be made from a permanent magnet. Both the spring 7 and the magnetic conical seat 9 act in the Way that they urge the ball 5 to rest against the valve seat 4 or the magnetic cone seat 9 after the ball 5 by means of of the mandrel 8 has been pushed through the holder 6. These the pressure causing the ball 5 to rest on the valve seat 4 or the conical seat 9 can be overcome by ejecting the contents of the container will; however, in the absence of an ejection pressure, it has the effect that the ball 5 closes against the valve seat 4 and 9, respectively. Thus is a refilling the container impossible.

The mandrel 8 can be inserted into the connection piece from the open side will. It can, for example, as shown in FIGS. 1, 2 and 3 dashed indicated, be dome-shaped at its front end, so that it is in positive engagement with the ball 5

- 12 -

COPY \

can be brought. By hammering in, screwing in or something else Depression of the mandrel 8 causes the ball 5 to be deformed or destroyed of the ribs on the holder 6 pushed through them so that they move out of the fixed open position shown in FIG. 1 into a labile one Operating position, e.g. with an external overpressure, into the in Fig. 2 arrives specified locking position, in which the ball 5 of the valve seat 4 or the cone seat 9 rests in a sealing manner. While piercing the Ball 5 have the ribs 11 resp. pointed ends 11 b elastically deformed to a certain extent, so that the finally formed opening is not sufficiently large to the Ball 5 from the unstable operating position in its starting position, such as it is shown in Fig. 1 to return.

In the position of the ball 5 shown in FIG. 1 - the fixed open position, the container can be filled with fluid. In this position, the ball 5 rests on the outside of the ribs 11 of the holder 6. The fluid can pass into the valve housing 2 when the valve body 1 is open in the space between the ball 5 and the solid ring-shaped part of the holder 6 on the one hand and the ribs 11 attached to it on the other hand. After completion of the filling process, the mandrel 8 is driven in so that the ball 5 is brought into an unstable operating position, as shown in FIG. 2, in which the passage of the fluid from the container via the connection piece 3 to the outside is still possible is. If, however, an attempt is made to fill the empty container again, which is only possible under overpressure from the outside, the ball 5 is already due to the filling pressure and possibly. with the assistance of the spring force 7 or the magnetic force of the cone seat 9 pushed against the valve seat 4 or the cone seat 9, thus blocks access to the container and makes refilling impossible. It should be pointed out that the destruction of the ribs 11 upon actuation of the mandrel 8 makes the unstable position of the ball 5 permanent and therefore irreversible.

copy - 13 -

As shown in FIG. 3, the play D of the ball 5 between the valve seat 4 or the cone seat 8 and the holder 6a, 6b or 6d is also small and there is therefore no spring 7 as shown in FIG and 2 is shown, is necessary because after the ball 5 has been pushed through the holder 6a, 6b or 6d by means of the dome 8 or some other aid, there is only a small gap as play D of the ball 5, so that it does not out of the valve seat 4 can. The reference numeral 5 ¹ denotes the ball in its blocking position resting against the valve seat 4. It should be noted that after the ball 5 is pushed through the holder 6a or 6b, the ribs 11 are deformed as shown in FIG.

Another embodiment of the bracket is shown in Figures 7A and 7B shown. The holder shown with 6d has a central opening 27, the diameter of which is in the direction of that indicated in FIGS. 7A and 7B Arrow 30 decreases conically; the direction indicated by arrow 30 runs from that initially assumed by the closure element or the ball'5 fixed open position towards valve seat 4 or conical seat 9. When the ball 5 is pierced, the holder deforms under elastic Expansion of the central opening to allow the ball to pass through. This widening of the through-channel is caused by the arranged around the central channel Through holes 23 supported. It should be noted that the bracket 6d could also be ribbed, although this not shown in Figs. 7A and 7B. For versions with the holder shown in FIGS. 7A and 7B, the play of the means applies with regard to the play a dome or other aid pierced through the bracket Ball the same as in this context for the embodiments 6a and 6b shown in FIGS. 3, 5 and 6 with regard to the Game D was mentioned, where, as can be seen from Fig. 3, there is such a small game D that the ball 5 their position in which they are on Ball seat 4 rests, can not leave, so that the attachment

\ - ^C T4- '

a compression spring 7 or a magnetic conical seat 9 is unnecessary. In In the same way, such a small play D could also be provided in embodiments with the holder 6d shown in FIGS. 7A and 7B be.

The.Fig. 8A and 8B show another embodiment of the bracket. It is a combined part of bracket and valve seat, included the holder is designed according to the embodiment 6d in Fig. 7A, B with a conical through-channel and outer through-holes. The embodiment shown in FIGS. 8A and 8B is the only one in one piece Part formed. And represents a cone seat holder 25, it serves as a holder and as a cone seat. This cone seat bracket is preferably welded or soldered to the valve housing 2. the Ball 5 can easily be inserted into the holder 25 by hand during assembly. The outlet part 3 is preferably permanently above the Cone seat bracket 25 attached. In this design, no compression spring 7 and no magnetic conical seat 9 is required to " To hold ball 5 in its position in the conical seat holder, neither in its initial position, i.e. in the fixed open position, nor after the ball has been pierced by the holder from its fixed open position by means of the dome 8 (operating position); because game A, that is present before and during the filling process of the container, and that Game B, which is present after the ball 5 by the holder 25 by means of of the cathedral 8 has been pierced are compared to the size of the Ball 5 is so small that the ball can only move within the limits of game A and B. This ensures a good one Operation of the valve without any aid, such as a compression spring 7 or a magnetic cone seat 9, as in Figs. 1 and 2 shown would be required. ,

- 15 -

The advantage of the one-piece tapered seat holder 25, like them 8A and 8B is that one less part is required than in the previous versions. This simplifies Manufacture and assembly of the valve. Furthermore, when assembling the parts, time is saved in that the ball 5 is in the holder 25 does not have to be fixed. Because of this simplicity in manufacture and assembly, the device with the valve according to the invention is economical.

In FIGS. 8A and 8B, the position of the ball in its maximum limit position is indicated with a solid line, even before the mandrel 8 was actuated in order to push the ball through the part of the element 25 serving as a holder (open position). The dotted line indicates the position of the ball in its other limit position ^{with 5 1, also before the actuation of the dome 8.} Them accordingly to 'the position of the ball in the case of concern to the forming of the conical seat part of the member 25 and a dash-dotted line 5' is provided with a dashed line 5 ¹ '', the position of the ball in its other limit position after actuation of the dome 8 for piercing the ball through the part of the element 25 serving as a holder (operating position). In the illustration in FIG. 8B, the position of the through holes 23 is specified in more detail. These are arranged around the passage of the element 25, the conical seat holder.

If pressure is then applied again to the ball, it deforms Ball makes the cone seat elastic, so that the ball can no longer return to its initially assumed position. When a bullet out Plastic is used, rather than when a steel ball is used, the ball is expected to elastically deform itself so that it can can then no longer return to its initial position.

The front section of the dome 8 is preferably to be provided with an end piece adapted to the shape of the ball and made of durable plastic or any other non-metallic material in order to avoid damage to the ball 5. ' n

The valve according to the invention of the embodiments of FIGS. 9 to 11 is similar to the valve of the above Embodiments described from a valve body 1, which is axially movable, optionally via a thread 31 in a valve housing 2 is arranged. Between the valve body 1 and valve housing 2 is a Seal 32 is provided. The valve housing 2 is connected by its end 33 to the pressure vessel to be filled, for example welded or the like. The valve housing 2 has, starting from its end 33, a channel 49, which is a valve serving shoulder expands and leads to an outlet 47. An annular projection 36 is provided above the valve seat 4, which is nose-shaped in cross-section, the tip of the nose being directed towards the valve seat 4 and the bridge of the nose from the tip of the nose continues to rise.

A central axial recess 38 is provided in the valve body 1, in which the punch neck of a stem-shaped valve element 5 sits and is held in a clamping manner in the recess 38 by a bead 41 on the punch neck 39. The stem-shaped valve element 5 has a punch head 42 with a flat, radially extending surface 43 and extending therefrom parallel to the punch neck 39 Approaches 46 on. In plan view, the valve element 5 has that from the figure apparent shape, with four elastic arms 44 extending radially on which the lugs 46 are provided. Between Arms 44 is each a recess 42 through which the gas on Valve element 5 can flow past when it is in its open position. The central area is so large that it forms the canal 49 can complete completely.

During manufacture, the valve body 1 is in its recess 48 through the bead 41 clamped inserted valve element 5 into the Housing 2 introduced, the screw-in depth initially by a

- 17-COPY

removable locking stop can be limited. The valve body 1 and the valve element 5 are in the process shown in FIGS to 11 continuously drawn position screwed into the housing 2. The pressure vessel is then opened through opening 47, with which the valve is provided, the filling gas through the opening 47, along the lower part of the valve body 1 through the free spaces between the valve head 42 and the channel 49 flows. After filling, if necessary, the limit stop (not shown) removed and the valve body with the valve element 5 is screwed further into the valve housing 2, the lugs 44 with the lugs 46 of the valve element 5 through the narrowing ring 36 of the valve housing 2, which is nose-shaped in cross section, to the side are printed so that the valve element slide past the ring extension 36 can. When the valve element 5 is pressed in far enough, the arms snap back again. A renewed pulling up of the valve element 5 is not possible because the lugs 46 on the ring attachment 36 danr, come to rest and the movement of the valve element 5 is limited. If the valve body 1 continues after is screwed up, the plunger 39 and in particular the bead 41 is released from the valve body 1, so that both parts are separated. The valve element 5 can then move freely within a certain range.

The valve body 1 is now moved so far into the valve housing 2, that he firmly presses the punch over its neck 39 with its head and more precisely its surface 43 from the valve seat 4. The one from that The channel leading to the pressure vessel is thus reliably closed. Should from the pressure vessel on which a valve according to the invention is attached, gas or the like are removed, the valve body 1 is moved in the opposite direction, that is moved upwards, where he over the bead 41, the valve element 5 takes along up to the stop on the projection 36 so that the valve element 5 can then move freely in a certain range. Likewise

COPY \

the valve element 5 is pushed upward by the escaping gas until the projections 46 come to rest against the annular projection 36 come. If so the valve element 5 is lifted from the valve seat, gas can from the pressure vessel via the channel 49, through the Gaps between the arms 44 escape past the lower region of the valve body 1 through an outlet opening 47. Will now after emptying the valve provided with the invention If the pressure vessel tries to refill, the valve element 5 is pressed against the valve seat 4 under the filling pressure acting and thus the passage is completed, so that refilling is not necessary is possible. The design according to the invention also prevents the valve element for the purpose of such refilling is forcibly held from the outside in a position raised from the valve seat 4. There is no attack here on the valve element possible.

The configuration of Figures 10 and 11 are largely the same, like that of FIG. 9. Only the valve elements and their contact area on the valve body 1 are designed differently. In the The embodiment of FIG. 10 shows the valve element 5 in a plan view Design of a section of a circle with two parallel cut surfaces. It has a cylindrical engaging portion in cross section 48 on, the housing in the narrowed channel 49 of the valve 2 can intervene. A radial part 49, which is designed to sit on the valve surface 4, extends from the engagement section 48 is. From this radial extension 49 extends just as in the embodiment of Figure 9 each have an axial extension 46. The valve element 5 can be formed with a central extension which is in one of the Recess 41 engage corresponding recess of the valve body 1 can. However, such an intervention is not necessary.

For filling, the valve body and valve element 5 are located in the in

- 19 -

Copy!

FIG. 10 position shown in a dotted line. The Venti! Element 5 is held by the ring extension 36 against the filling pressure of the valve seat 4. After filling, the valve body 1 continues Moved into the valve housing 2, presses, as in the embodiment of FIG. 9, the elastic valve element over the ring attachment 36 and is freely movable below the same, so that it is pressed away from the valve seat 4 under gas escaping from a pressure vessel can be so that the gas on the long sides of the valve element 5 can flow past. When pressure is applied from the outside, the valve element with its surface 49 is against the valve seat 4 is pressed so that the valve is sealed and refilling later is not possible. When the valve is not in use it sits for sealing a conical area 51 of the valve body 1 on a correspondingly designed conical area 52 of the valve housing tightly, whereby a reliable seal is achieved. Such a seal is also used in the design of the figure 9 given as an additional seal.

In the embodiment of FIG. 11, the valve element 5 also has Stamp shape on, with the stamp neck in the opposite direction Direction is aligned, as in Figure 9. The punch neck 53 is also hollow and has wall in its jacket lateral openings 54. A punch head 56 designed as a flat plate is provided on the top of the punch neck, which has essentially the same design in A top view, like the punch head of Figure 9.

During assembly, the valve element 5 is first inserted into the valve housing 2 and then the valve body 1 introduced. In the first When filling, the valve element 5 is held in its open position, shown drawn in FIG. 11, by the ring attachment 36, so that the pressure vessel provided with the valve according to the invention can be filled. Subsequently, the valve element with its valve head 56 is over under the action of the valve body 1

COPY 1 ²⁰ -

the ring extension 36 pressed, the arms 44 of the valve head 56 spring back until the valve element 5 over the tip of the nose of the Nose 36 has slipped past. The arms 44 of the valve head 56 are then relieved again, arrive in their starting position, so that the valve element 5 no longer over the nose 36 upwards can be pressed. In the case of gas flowing out under internal pressure, the valve element 5 moves away from the valve seat 4 upwards against the pressed close to the ring attachment 36, the gas initially from the channel 49 through the interior of the punch hai ses 53, the openings 54 and then between the arm-shaped projections 44 through flows outside. Under increased external pressure, when trying to refill, the plunger 5 is pushed completely into the channel 49, so that it is reliably sealed. To close the valve according to the invention are just as in the design 9 and FIG. 10 conically engaging surfaces 51 and 52 are provided.

Those disclosed in the above description, in the drawing Features can be used both individually and in suitable combinations for the implementation of the invention in its various embodiments be essential.

Claims (31)

PATENT CLAIMS 1. Valve for pressure vessel, ζ. Β. Compressed gas cylinders, consisting from a valve housing placed on the container, a valve body movable therein by means of a handle, an outlet, e.g. for removing the fluid contents of the container, and a valve element for locking the valve under external pressure after an initial filling, characterized in that a Blocking element (6, 6a, 6b, 6d; 36) is provided that is suitable for the valve element (5) for the initial filling of a pressure vessel first to hold in a fixed open position and that the valve element (5) overcoming the blocking element (6a, 6b, 6d; 36) can be brought into the position on which it is in the open position under the container pressure, but under the action of a external overpressure and / or the action of an auxiliary force (7) can be automatically moved into the blocking position. COPY; st 3337137 2. Valve according to claim 1, characterized in that when acting an aid (8) the blocking function of the blocking element (6a, 6b, 6d) for blocking the same in an open position is irreversibly canceled for the first filling, so that when there is an excess pressure acting from the outside, the valve element (5) rests sealingly against an A / valve seat (4). 3. Valve according to claim 2, characterized in that the aid (8) attacks from outside the valve. 4. Valve according to one of claims 2 to 3, characterized in that that the blocking element is designed as a ring (6a, 6b, 6d; 36) arranged in the valve housing (2, 3). 5. Valve according to one of claims 2 to 4, characterized in that that the blocking element (6a, 6b, 6d; 25; 36) one for the valve element (5) provided through channel (15): the on the side of the blocking element facing the valve seat (4) (6a, 6b, 6d) has a free cross section which is smaller than the free cross section on the valve seat (4) facing away Side of the blocking element (6a, 6b, 6d) and is also smaller than the cross section of the closure member (5). 6. Valve according to claim 5, characterized in that the blocking element (6a, 6b) are formed around the through-channel (15) through-holes (23). 7. Valve according to one of claims 5 or 6, characterized in that that the blocking element (6a, 6b) several radially in the through channel (15) has projecting ribs (11; 11a, b) for holding the valve element (5). COPY 37197 8. Valve according to claim 7, characterized in that the ribs (11; 11 a, b) when exercising their holding function between the Valve seat (4) and the valve element (5) are arranged. 9. Valve according to claim 8, characterized in that the. __ Ribs (11) exclusively in the area of the valve seat (4) facing output of the Durchgangskanat.s (15) arranged are. 10. Valve according to one of claims 5 to 9, characterized that the ribs are at least partially deformed by the action of the auxiliary means (8) for releasing the closure member3. 11. Valve according to claim 10, characterized in .daß dre Ribs are deformed that'das tool (8) a Exerts pressure on the valve element (5). 12. Valve according to claim 10 or 11, characterized in that the ribs are deformed in that the auxiliary means (8) exerts pressure on the ribs (11). 13. Valve according to one of claims 10 to 12, characterized in that that the aid has a mandrel (8). 14. Valve according to claim 13, characterized in that the mandrel (8) is arranged on the inside of a closure cap which can be attached to the connecting piece (3). 15. Valve according to one of claims 4 to 14, characterized in that that ribs (11; 11a, b) are arranged on the inside of the ring (6a, 6b). 16. Valve according to claim 15, characterized in that the ring (6a, 6b, 36) and the ribs (11; 11a, b) are made of plastic. . 17. Valve according to claim 15, characterized in that the Ring (6a, 6b, 36) and the ribs (11; 11a, b) made of metal exist. 18. Valve according to one of claims 5 or 6, characterized in that that the free cross-section of the through-channel (15) of the holder (6d) decreases continuously along the path that goes in the direction from the point at which the closure member (5) is or has been in its fixed open position to the valve seat (4) runs towards. 19. Valve according to one of claims 2 to 18, characterized in that that the valve element (5) under the action of an auxiliary power device (7) urging it against the valve seat (4) stands. 20. Valve according to claim 19, characterized in that the auxiliary power device has a spring (7). 21. Valve according to claim 19 or 20, characterized in that the auxiliary power device has a magnet. 22. Valve according to one of claims 1 to 21, characterized in that that the valve element is designed as a ball (5). 23. Valve according to one of claims 2 to 22, characterized in that that the valve seat (4) and the valve element (5) are designed in the manner of a ball check valve. ™ j · ■ COPY 24. Valve according to one of claims 1 to 21, characterized in that that the valve element (5) as a closure plate is trained. 25. Valve according to one of claims 1 to 21, characterized in that that the valve element (5) is designed in the shape of a stem with a punch neck (39) and a punch head (42). 26. Valve according to claim 25, characterized in that the '' Punch neck (39) of the valve plunger (5) into a pressure vessel executed canal (49) protrudes. 27. Valve according to claim 25, characterized in that the valve neck (39) in an axial recess (38) of the valve body (1) protrudes. 28. Valve according to one of claims 24 to 27, characterized in that that the valve element (5) elastically designed arms (44) cooperating with the blocking element (36) having. 29. Valve according to one of claims 4 to 24, characterized in that that the ring (6a, 6b,) would take the valve seat (4) is attached. 30. Valve according to one of claims 2 to 28, characterized in that that the valve seat (4) with the blocking element (6, 36) is designed as an integral part (25). 31. Valve according to one of the preceding claims, characterized in that indicates that the valve element (5) in a side of a valve body (1) located connector (3) for the Removal of the fluid container contents is arranged.