DK171655B1 - A gas container valve - Google Patents

Description

DK 171655 B1

The present invention relates to a gas cylinder valve of the kind set forth in the preamble of claim 1.

In the practical use of liquefied gas in the individual hopper, a gas bottle or the like is connected via a hose connection with a pressure regulator, ie. with a pressure reducer.

5 When using gas, this regulator is mounted on the gas cylinder valve on a filled gas cylinder and it is fixed by means of a coupling device. After emptying the gas cylinder, the pressure regulator is switched off by the gas cylinder valve and a full spare gas cylinder is reattached. The empty gas bottle is refilled at a filling station, after which it can be used again.

10 German Publication No. 3,734,050 discloses a gas cylinder valve whose filling and emptying opening is protected against contamination by an inner plate membrane, but these contaminants can nevertheless be collected in or next to the membrane and be blown into a gas cylinder with a bottle valve at the filling process. , and in some circumstances they may also interfere with the consumption of gas from the bottle. Thus, effective protection in the form of a dirt repellent is found here only to a very limited extent.

A gas cylinder valve according to FR-A-1 543 482 has an inner closure body in the form of a non-return valve; however, the valve seat is located on the shutter body itself. An outer sealing ring provides limited dust protection, but cannot guarantee pressure tightness when the valve seat is opened just a little. An external safety seal is also missing.

The same applies to a gas cylinder valve according to FR-A-1 387 267, where the non-return valve has a two-stage design, but in which again the valve seat itself must take over the seal at two different diameters, while a sealing ring in the head of the housing only becomes effective against a 25 regulator when applied. Here too, an external security seal is missing.

In a valve according to FR-A-1 530 375 there is no sealing insert. A seal ring In the head of the housing here, too, only becomes operative at the connecting shaft of an attached regulator, without thus protecting the bottle valve as such, by the dismounted regulator.

30

Gas bottle valves of the construction mentioned in the introduction, when there is a so-called safety closure according to FR-A-2 311 989 or German publication specification No. 1,650,177, are provided with an inner gasket ring which essentially has to fulfill two functions. First, when the pressure regulator is not applied, it must seal a closure plug with the valve closed at the top to prevent foreign bodies from entering. Second, when the pressure regulator is applied, the gasket ring takes over the sealing of the connector against the atmosphere. This is done by pushing the closure plug downwards from the sealing ring when the pressure regulator is applied, while at the same time a cylindrical pin on the pressure regulator penetrates into the sealing ring.

Thus, when the pressure regulator stays with the consumer while the gas cylinder 5 connected to the bottle valve is transported to the bull station, the result is that a pressure regulator must be constantly connected with new bottle valves.

According to the prior art, greater tolerances are predetermined in the manufacture of bottle valves and pressure regulators for economic reasons. In particular, the closure plug on the bottle valve and the tap on the pressure regulator have mostly different diameters. It follows that, when coupling the pressure regulator with other cylinder valves, very different pressures occur on the surfaces of the gasket ring which is on the gas cylinder valve concerned.

This can lead to sealing problems, especially as the multi-seal ring in the bottle valve is permanently loaded by the closure plug, which is also the case with a static seal. Depending on the manufacturing tolerances on the targets and on the surface quality, the application of the pressure regulator constantly creates other spatial conditions and physical local conditions. In order to seal well, the packing ring should equalize or compensate as short as possible during the coupling process itself. However, the normally elastic packing material requires long relaxation times to regain its original shape and at least approximately its original elasticity. Therefore, leaks cannot be avoided.

It is an important object of the invention to economically overcome the disadvantages of the prior art and to provide a gas cylinder valve with an improved gasket device which effectively protects the cylinder valve from penetration of foreign bodies when the pressure regulator is not applied to the cylinder valve and guarantees a reliable seal against the atmosphere when the pressure regulator is turned on.

The invention is peculiar to the characterizing part of claim 1. In claims 2-8, various embodiments of the invention are specified.

According to the invention, a first sealing ring is arranged on the upper side of a bottom part which is located in the lower part of the closure body. The closure body has radial freedom of movement at the upper part outer opening, whereas it is inserted into the tight fitting sliding sleeve, which sliding sleeve is formed with axially short cylindrical walls to which in the direction of the outflow gas joins another gasket member with an inner, unloaded state. radially inwardly facing abutment surface of the gasket ring enclosed in the groove.

DK 171655 B1 3

The main advantage of this device is that the first sealing ring located inside / below the valve also takes over the pressure-tight sealing externally when the upper second sealing ring does not or no longer performs this function in connection with the application and removal of the sealing ring. a regulator. By virtue of this two-stage safety device, the invention differs substantially from the prior art, so that even larger pin diameters belonging to the applied regulator can be accommodated very well, without affecting the gas-tight closure.

In addition, all the problems that have been associated with the use of gas cylinders for a long time have been solved once under harsh conditions. According to the invention, one can completely avoid the cover, which is easily lost or never used. At the double seal, the problem of diameter tolerances is also solved for the first time, and it can be assumed that the loads of both packing rings remain substantially uniform. This ensures an impeccable sealing function, even under adverse conditions.

An advantageous embodiment is claimed in claim 2, wherein the second packing ring in axial direction 15 is at least half as long or high as the closure body. This causes a wide sealing surface, while at the same time sufficient radial elasticity or resilient clearance is present, allowing a solid abutment either by the shutter body or by the downstream regulator loss.

In the construction form according to claim 3, the upper part extends into one with the valve housing, where the closure body as well as a support for the valve seat and the check valve can be inserted from below.

In the alternative embodiment according to claim 4, the upper part is a standalone unit which can be screwed into the valve housing from above with a closed body. This embodiment is very advantageous in terms of assembly.

25

According to claim 5, the first packing ring is in particular arranged in an outer ring groove on the closure body. Due to the cooperation achieved with a flap or inlet constriction at the sliding sleeve, the first seal guarantees a solid, regular system in the closing position.

In the embodiment according to claim 6, the closing body, or at least the bottom part thereof, is guided into a sliding sleeve which is arranged in the upper part or screw-in part of the valve housing and is provided with holes or holes through which the gas can flow. Such a sliding sleeve prevents the locking body from getting warped or jammed, which might otherwise occur.

In addition, according to claim 7, the closure body is loaded in the upward direction by a compression spring, the lower end of which rests against the interior of the valve housing. The upper end of the compression spring may abut against the bottom part of the shutter body or against another inner surface in the upper part of the almost hat-shaped shutter body. This results in an optimal abutment of the upper spring end, namely either on the largest diameter or in the upper inner region. The lower support base of the compression spring can, according to claim 8, be constituted by a bottom part of the sliding bush, which contributes to simplified mounting. In any case, it is an advantage if the compression spring in the valve body is supported independently of the check valve spring so that a floating spring bearing is avoided.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail with reference to the accompanying drawings, in which: FIG. 1 shows a side view, partly as a cross-section, of a gas cylinder valve with an applied pressure regulator; FIG. 2 is an enlarged view of the gas cylinder valve of FIG. 1 without pressure regulator; FIG. 3 is a side view, partly in cross-section, of another embodiment of a gas cylinder valve and a pressure regulator in separate form; FIG. 4 is an enlarged view of the gas cylinder valve of FIG. 3 in two different operating positions, without 15 pressure regulator, and fig. 5 is a cross-sectional view of yet another embodiment of a gas cylinder valve with a one-piece valve housing.

A gas cylinder valve 10 is shown in FIG. 1 with applied pressure regulator A to clarify the interaction of these two 20 elements in the practical application. Details of gas cylinder valve 10 are better seen in FIG. 2nd

The gas cylinder valve 10 has an upper part 12 with a bead 14 intended to engage a stop or stop 54 on the applied pressure regulator A. By means of a switching handle 56, the stop projection 54 is locked as soon as it is in place. under the bead 14.

From the regulator A, a pin 58 exits for connecting a gas hose.

In the valve housing 16 on the gas bottle valve 10 is a non-return valve 20 which, in the shown closing position under spring action, abuts against a valve seat 16. A safety valve 22 is schematically shown on the side of the valve housing 16. Downwards, the valve housing 16 continues with a screw cone 24 for screwing in. in a corresponding, not shown, threaded cone on a gas bottle.

As shown in FIG. 2, in the upper part 12 there is a sliding sleeve 26 for a closure body 28, the upper side of which ends in level with the upper part 12, against which the closure body is pressed by a compression spring 46. The closure body 28 is formed with a centered bore which can slide on a valve pin 62 in the check valve 20. The above-mentioned individual parts are easy to install as they can be inserted into an upper part 12, after which it is screwed downwards from the valve housing 16. A sealing ring 66 ensures that there is a close between the unscrewable part 12 and valve body 16.

DK 171655 Pg 5

The closure body 28 may, as shown, have a diameter variation, e.g. a stepwise reduced diameter. At the bottom or at the lower end, it carries a bottom portion 34 against which the upper end of a comically formed compression spring 46 is supported in this embodiment. Its lower end lies in the interior of the valve housing between the inner wall of the upper portion 12 in a kind of ring groove located on the upper side of a radially inwardly supporting carrier for valve seat 18. In this construction, the valve seat carrier integrates with valve housing 16.

At the upper side of the bottom part 34 there is a first gasket ring 36 in a ring groove 38. This gasket ring cooperates with a flap or inlet narrowing 36 at the lower end of the sliding sleeve 26.1 The gas removal direction is arranged a second gasket ring 32 in a ring groove in the upper part 12 below. an outer opening 40. The second packing ring 32 takes over the sealing of the closure body 28 against its smaller outer diameter, while the first packing ring 30 at the larger inner diameter of the bottom 34 seals the closure body 28 against the flap 36 of the sliding sleeve 15. Thus, this arrangement forms as one will see, a kind of other non-return valve which has a sealing function not only externally, but also in cases where the actual non-return valve 20 is leaking for some reason.

Now that the regulator A is placed on the gas cylinder valve 10 (Fig. 1), the centered pin 60 of the pressure regulator A 20 penetrates the outer opening 40 of the bottle valve 10. Again, the second gasket ring 32 takes over the seal, while the closing body 28 moves inwardly on the valve pin 62 and the compression spring. 46 are pressed together. In this position, operation of the check valve 20 by means of the control pin B is possible, the control pin being inserted in the pin 60 and moved downwards when a locking device is opened at the gas consumer (not shown).

25

In all these operations, and especially after dismantling of controller A, the gas cylinder valve 10 is constantly sealed to the atmosphere, partly by the second sealing ring 32, and partly by the first sealing ring 30 when the closing member 28 is in the closed position, so that no foreign bodies may enter the interior of the gas cylinder valve 10. Nevertheless, 30 still has the opportunity to inspect the check valve 20, since the upper part 12 (if necessary) can be unscrewed from the valve housing 16.

A similar arrangement is shown in FIG. 3, namely another embodiment of a gas cylinder valve 10 with dismounted regulator A, which is also of a different construction than in fig. 1. The bottle valve 10 is shown in FIG. 4 shown enlarged. The structure is basically the same as in FIG. 2, however, the construction is slightly higher and more elongated. Thereby, in the upper part 12 below the outer opening 40, space is made for a second packing ring 32 of a larger axial length, whereby the short sliding sleeve can be continued outwards. The closure body 38 is most nearly hat-shaped with an upper face surface 48 against which the upper end of the compression spring 46 is supported. This spring is here cylindrical and is supported at its lower end against a bottom portion 50 of a sliding sleeve 42 which is inserted from below in the unscrewable upper portion 12 and along the circumference carries bores 44 which permit a gas flow. In addition, the closure body 28 carries over a bottom part 34 5 a first gasket ring 30 in a ring groove 38 which cooperates with a flap or inlet constriction 36 before the sliding sleeve 26.

The method of operation is shown in FIG. 4. In this figure, the closing position is shown in the right half, where the closing body 28 with the two gasket rings 30, 32 causes a complete outer closure 10 (see also Fig. 3). When the regulator A is mounted, whereby its receiving member 52 engages over the bead 14 until the stop projection 54 is locked to the upper part 12 of the gas cylinder valve 10, the pin 60 penetrates through the outer opening 40 of the second packing ring 32. The shutter body 28 is then pushed downwards. and the compression spring 46 is compressed (left half of Fig. 4).

As can be seen, the compression spring 46 and thus also the hat-shaped closure lids 28 are brought down on the valve pin 62, while the bottom part 34 is also supported and inserted into the sliding sleeve 42. This sleeve with its bottom part 50 is centered around the valve pin 62.

In the embodiment of FIG. 5, the gas cylinder valve 10 has a similar outer contour as in FIG. 4. The elements located in the interior of the upper part 12 are also made of the same. The 20 of FIG. 5, however, is different from the above gas cylinder valves in that the upper part 12 extends into one with the valve housing 16. The valve seat 18 for the non-return valve 20 is arranged on a screw 68 which can be screwed in and which on its lower side carries recesses or countersink holes 70 for a (not shown) insertion tool, eg a screwdriver. The check valve 20 itself forms, together with the valve spring 64 and the sleeve 76, a collection of elements which can be inserted and 25 screwed down from the bottom of the valve housing by means of an insert 72. Wells 74 in the insert 72 allow the gas to flow through. It is seen that in this embodiment, a complete seal of the gas cylinder valve 10 is secured by means of the closing elements 28, 30, 32, and on top of the purchase, regardless of whether the gas cylinder valve 10 is possibly provided with an additional cap (not shown).

30

An important advantage of the novel gas cylinder valve 10 according to the invention is that the regulator A, which is already out of the consumer in an extremely large quantity, can now be used with greater security and with complete protection against penetration of foreign bodies, dirt and the like. This significantly extends beyond the capabilities of the known gas cylinder valves.

Furthermore, it does not matter to the invention whether or not the gas cylinder valve 10 carries a safety valve 22 or not.

Claims (8)

A gas cylinder valve (10) for removable mounting on a liquid gas gas bottle, e.g., propane, butane or mixtures thereof, comprising an upper portion (12) which externally carries an annular bead (14) for co-operation with an applicable diaphragm pressure regulator (A) by means of which the gas can be tapped, and internally a groove packing ring (32) for sliding abutment for a pin (60) of the diaphragm pressure regulator (A), and comprising a valve housing (16) with a valve seat (18) for a spring-loaded check valve (20) operable via a control pin (B) connected to the diaphragm pressure regulator (A), and in the lower part a screw cone (24) 10 and a spring-loaded, external sealing closing member (28) with a diameter variation, which closure body projects into a sliding sleeve (26) in the upper part (12), characterized in that a first packing ring (30) is arranged on an upper side of a bottom part (34) below the closure body (28), and the outer body (28) of the upper part (12) being outer The opening has a radial clearance, whereas it is inserted in the tight fitting sliding sleeve (26), which is formed as an axially short, cylindrical wall arrangement to which an inner, unloaded, radially inwardly directed abutment surface joins. on the second seal ring (32). Gas cylinder valve according to claim 1, characterized in that the second packing ring (32) in the axial direction is at least half as long or high as the closing body (28). Gas cylinder valve according to claim 1, characterized in that the valve housing (16) integrates with the upper part (12) and that the closing body (28), a support (68) for the valve seat (18) and the check valve (20) can inserted into the valve housing from below (Fig. 3). 25 Gas cylinder valve according to claim 1, characterized in that the upper part (12) is a self-contained part which can be screwed into the valve housing (16) from above with an inserted closing body (28). Gas cylinder valve according to any one of claims 1-4, characterized in that the first sealing ring (30) sits in an outer ring groove (38) of the closing body (28) and cooperates with a flap or inlet narrowing (36) of the sliding bush (26). Gas cylinder valve according to any one of claims 1-5, characterized in that the closure body (28) is inserted at least with its bottom part (34) into a sliding sleeve (42) which fits in the upper part or screw-in part (12). ) of the valve body (16) and carrying bores (44) allowing the gas to flow through. DK 171655 Pg 8 Gas cylinder valve according to any one of claims 3-6, characterized in that a compression spring (46) which presses the closing body (28) upwards is supported with its lower end in the interior of the valve housing (16), and that the upper end of the compression spring (46) from below abuts against the bottom part (34) or against an upper inner surface (48) of the generally hat-shaped closure body (28). Gas cylinder valve according to any one of claims 6 or 7, characterized in that a bottom part (50) of the sliding sleeve (42) constitutes the lower supporting surface of the compression spring (46). 10