DE2912081A1 - VALVE FOR COMPRESSED GAS PACKINGS - Google Patents

Description

DIPL.-ING. HANS W. GROENING

FATE N ADVERTISER
S 1-93

Valve for pressurized gas packs

The invention relates to a valve for pressurized gas packs with the features of the preamble of claim 1.

Such a valve is known (cf. DE-OS 2 503 626 and DE-AS 2 559 444). In this valve, it is the valve housing completely surrounding bead radially outwards and in the direction of the end wall of the valve carrier up to System on this extended by a supporting wall in which axially parallel incisions are formed. The bulges reach under the retaining wall. When filling with a pressure medium with a relatively high pressure, the pressure medium not only via the valve stem of the valve, the interior of the valve housing and a channel in the nozzle of the Filled valve housing for a dip tube, but also

030040/0407

SIEBEHTSTH. 4 8000 MUNICH 8β POB 860S40 KABEL: HHEINPATEST TEL. (089J 4710 79 · TELEX 5-22B3B

outside the valve stem through the filling opening, which formed between the valve stem and the inner edge of a circular opening in the end wall of the valve carrier is. When filling, the pressure medium acts on the sealing washer so that the two over the annular clamping edge radially inwardly or outwardly protruding edge areas of the sealing washer against the adjoining walls of the valve housing be folded in the direction of the interior of the pressurized gas pack. This causes the pressure medium to flow through the filling opening on the one hand past the valve stem through the channel and the immersion tube, on the other hand also outside the Valve housing between this and the peripheral wall through the axially parallel incisions in the supporting wall are filled. In this way, fast filling is particularly important possible when the immersion tube has a relatively small cross-section. In the known valve is a allows the pressure medium to flow in relatively unobstructed during filling, but is the diameter of the valve body and thus also that of the circumferential wall of the valve carrier is relatively large, so that production engineering problems arise. Because of the relatively large radial distance between the contact surface of the bulges on the valve housing the lever arm for the forces acting during filling is increased, the valve housing can be removed from the anchorage in the Bulges are torn out.

It is the object of the invention to design a valve of the type mentioned in such a way that with a valve housing relatively small radial dimensions safe filling is possible even at high pressures.

The object is achieved according to the invention by the characterizing Features of claim 1 solved.

030Q4 0/0 407

The invention is further developed by the features of the subclaims.

A valve provided with a valve housing designed in this way is not only suitable for liquid propellants (such as FKW, KW etc.), but also for gaseous propellants (such as CO «, N-O, etc.) that are fed into the Pressurized gas pack can be filled in under pressure. It will the pressure or propellant for the most part through the space between the peripheral wall of the valve support and the outer wall of the valve housing, in particular the spaces of the bead sections is filled into the pressurized gas pack, while it is only filled to a small extent via the immersion tube will. This is particularly the case with valves with a narrow capillary riser pipe and when filling pressurized gas packs with gaseous propellants advantageous.

When filling with gaseous pressure media or propellants, the foaming of the material solution already in the can of the pressurized gas pack should create as large a surface as possible in order to achieve rapid absorption of the gaseous propellant by the active ingredient solution. This is intended to avoid the build-up of a very high pressure in the pressurized gas pack during filling "since this could damage the pressurized gas pack. Due to the inventive design of the valve, the gas flow supplied during filling can be blown very evenly onto the surface of the active substance solution in the pressurized gas pack, the active substance solution also being whirled up very deeply. This is achieved by defined flow paths that are formed by the spaces between the bead sections and the bulges of the peripheral wall of the valve carrier. The special design of the valve housing made it possible to attach the bulges in an oriented manner, that is to say a

0300AO / OA07

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oriented crimping, on the other hand the stability of the valve housing is increased against deformation during filling. In particular, it is avoided that the valve housing is torn out of the bulges by the pressure load during filling, surprisingly it has been shown that in the valve designed according to the invention, a higher pressure when filling with gaseous propellants to one lower build-up of an overpressure and the risk of bursting or bursting of the pressurized gas pack is reduced. This also has the advantage that the container can be filled more quickly by means of a such valve.

Since with such valves when filling the valve housing due to the high pressure compared to the upper part of the valve carrier or valve plate dome is pressed down when the pressure medium to be filled is no longer at the flows past the sealing washer lying against the end wall above the clamping edge of the valve housing, the valve housing must on the one hand be sufficiently flexible, but on the other hand it must be sufficiently stable so that it is not torn out of the fastening, i.e. the bulge or the crimp. The training according to the invention of the valve housing meets these requirements, especially if it is made of a polyamide.

It is essential that the trained according to the invention The size of the valve is practically different from conventional valves with conventional valve housings without such Bef impossibility is different. Even with pressurized gas packs previously provided with such valves, the Filling time with the pressure medium can be reduced, with the time saving in the case of pressurized gas packs with a capillary riser tube is extraordinary. This design is the inventive

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Appropriate valve can be used in practically all applications, namely not only in special cases, such as capillary risers or gaseous pressure media, but also in the so-called standard applications in which the riser pipe has a riser pipe nipple or socket is pushed. This versatility makes it just one type of assembly machine and filling device required, which also simplifies the storage of the individual parts required for the valve is. This results in considerable cost savings, with the conversion in existing assembly machines is only very minor.

The invention is explained in more detail with reference to the embodiment shown in the drawing. Show it:

Fig. 1 in longitudinal section according to the section line I-I in Fig. 2, a valve for pressurized gas packs ,

FIG. 2 shows a cross section along the section line II-II in FIG. 1 through the valve housing of the valve.

A valve housing 1 is in a valve disk dome or valve support 2, which forms the upper part of a pressurized gas pack sealing lid forms, firmly inserted. For this purpose, the peripheral wall 3 of the valve carrier 2 provided at several circumferential points with inwardly directed bulges 4, for example by crimping can be produced and engage under bead sections 5 of the valve housing 1. At the top of the valve housing 1 is a annular clamping edge 6 formed, which is an annular disk-shaped Sealing washer 7 presses against end wall 8 of valve support 2. This pressing takes place by means of the bulges 4 showing the bead sections and thus the valve body

030040 / Ό407

2312081

Press against the sealing washer 7 in the direction of the end wall 8.

The valve housing has a Innenraura 9, in the a valve stem 10 is inserted, one end of which passes through a valve stem in the end wall 8 of the valve support 2 formed circular opening 8a protrudes outward. The valve stem 10 has at this outwardly protruding end axial inner bore 11, which at the lower end of a Transverse hole 12 with an annular groove 13 on the outer circumference of the valve stem 10 communicates. The diameter of the lower annular shoulder of the annular groove 13 is greater than the diameter the circular opening 8a. A compression spring 14 is supported on upper end faces 16 of radial inner ribs 15 in the Interior 9 of the valve housing 1 and a lower annular shoulder 10a of the valve stem 10. In the closed position of the valve stem 10, the sealing washer is therefore sealing against the underside of the edge of the circular opening 8a pressed. As a result, a gas that is located in the pressurized gas pack and is under the pressure of a propellant gas can be used Product does not escape. When the valve stem 10 is pressed down against the force of the spring 14 into the open position, for example by means of a valve actuation head 18, the transverse hole 12 is released as shown. Consequently can the pressurized product via a (not shown) dip tube attached to a nozzle 19 of the valve housing is attached, and a channel 20 formed in this connecting piece 19 enters the interior space 9 and from this via the annular groove 13, the transverse hole and the inner bore 11 into the valve actuating head 18 and exit through a spray nozzle 21 located there.

Q30040 / 0407

2312081

-r-

The valve stem 10 has an annular bead 10b with a conical transition 10c above the annular groove 13, which in the closed position of the valve stem 10 fills the circular opening 8a in the end wall 8 of the valve carrier 2, but in the open position of the valve stem below the edge of the circular opening 8a lies. The conical transition 10c is then approximately at the level of the edge of the circular opening 8a, so that an annular filling opening 22 is formed. When the pressurized gas pack is being filled, the pressure medium, which can be liquid or gaseous, is filled in under very high pressure through this filling opening 22. The valve actuation head 18 can be withdrawn from the valve stem. Due to the high pressure during filling of the clamping edge 6 inwardly protruding part of the sealing washer 7 is pressed against the inner circumference of the interior 9 of the valve housing 1, so that the pressure medium can flow past the valve stem 10 through the channel 20 and the Tai chrohr into the compressed gas pack . At the same time, the sealing washer 7 is pressed onto the clamping edge 6 and the part of the sealing washer 7 protruding radially outward beyond the latter is pressed against the outer circumference of the valve housing 1. This creates a further flow path between the end wall 8 and the circumferential wall 3 and the outer circumference or the area of the bead of the valve housing 1. This flow path of the pressure medium is practically not opposed by any flow resistance, as is the case, for example, in FIG. B- can be the case with a filling through the channel 20 in the case of capillary risers. In this way, the container or the can can be quickly filled with pressure media, even under very high pressure.

030040/0407

^r -A4-

In order to achieve a very rapid and safe filling using valve bodies whose dimensions to that of a conventional valve housing corresponds to the invention is formed, the valve housing 1 at "o.inem upper end in a special way in accordance with.

From the outer wall of the valve housing 1, the bead sections 5 distributed over the circumference protrude symmetrically, which have shoulders 23, 24 substantially parallel to one another on the upper side and the lower side, of denon the upper shoulder, the folding down of the sealing washer and the lower shoulder, the flexibility of the latter Allow narrowing of the housing wall thickness. Between the shoulders are spaces 25 which are arranged with respect to the inner ribs 15 substantially symmetrically are.

Tangential surfaces 26, in the vicinity of which the bulges h are located, are formed under each of the bead sections 5. At the same time, these surfaces 26 allow. Housing feed in the assembly machine to ensure the orientation of the crimp. As a result of this oriented alignment, a consistently constant and reproducible position of the valve housing 1 in the valve support 2 can be achieved.

There are, as shown, four bead portions 5 and Interstices 25 or tangential surfaces 26 distributed symmetrically over the circumference of the valve housing. It can but also three or more than four bead sections and spaces or tangential surfaces can be provided.

To increase the stability, the outer wall of the valve housing 1 has a thickening 27 in the area of the spaces 25 and a thickening 28 on the inner wall. The surfaces of the two thickenings 27, 28, which are approximately parallel to the axis of the valve housing 1, form tangentxal planes or planes that are parallel to a tangent to the circumference of the valve housing 1 and each symmetrical to the associated

BATH ORIGINAL

limited by the adjacent bead sections 5, the end faces 29 of which are parallel to a main plane of the valve housing 1, which passes through the center of the gap 25. The thickening 28 on the inner wall gradually runs out into the clamping edge 6. The thickening 27 on the outer wall merges into the outer wall of the valve housing 1 in a stepped manner in the direction of the connecting piece 29. This transition can also be gradual.

A valve housing designed in this way essentially only requires the same space as a conventional valve housing, but enables filling from the outside via the filling opening 22, which was previously only possible with complicated designs Valve housings with a correspondingly adapted valve carrier was possible. By the flow path through the spaces 25 non-hindering, oriented bulges 4 are filled with gaseous pressure media or propellants possible in which the gas flow as evenly as possible on the surface of the already in the pressurized gas pack introduced active ingredient solution blows. Using a high pressure, a very deep turbulence is achieved. Such a strong whirling up or foaming a very large surface area is created for the active ingredient solution, through which the active ingredient solution quickly absorbs the gas. This will build up a high pressure, in particular a high maximum pressure in the pressurized gas pack and the risk of the pressurized gas pack bursting or greatly reduced. Filling tests have shown the higher the filling pressure when filling with a gaseous one The pressure medium is, the lower the maximum pressure built up.

030040/0407

In addition, the valve housing 1 is stable enough, but flexible enough to withstand the pressure exerted by the pressure medium To be able to withstand or evade pressure, for example by cushioning a slight Downward movement of the valve housing 1 relative to the bulges 4 takes place. In particular a valve housing 1 made of a polyamide fulfills these requirements.

When using the valve according to the invention, a single type of assembly machine and filling device Pressurized gas packs of different types are filled for the previously different assembly machines as well as different valve housings, sealing rings and valve supports were required. When using instead the previously usual valve housing, a shortening of the filling time can also be achieved there. So not only the Manufacturing costs of pressurized gas packs, but also the manufacturing costs and the storage costs for this required parts decreased overall.

030040/0407

Claims (7)

DIPL.-ING. HANS W. GROENING PATENTANWALT S 1-93 Perfect-Valois Ventil GmbH Alte Strasse 77a 4600 Dortmund 1 claims 1. valve for pressurized gas packs, \ ^ - ^y with a valve carrier, which has an end wall and a circumferential wall, with a relatively immovable valve housing, being distributed over the circumference, inwardly directed Bulges of the circumferential wall engage under a bead of the valve housing and the valve housing has annular clamping edge, and with a sealing washer for sealing an outlet channel, which is clamped between the clamping edge and the end wall, has an edge area protruding beyond the clamping area and has a peripheral edge, with a filling opening provided only within the clamping edge with the end wall and the sealing washer under the Influence of the filling pressure to form a filling path 030040/0407 SIEBERTSIB.4 8000 MÖNCHEN 86 POB 800840 KABUL: RHEINPA.TEHT TEL. (089) 471079 · TELEX 3-228 can be lifted off the front wall and, in order to enlarge the cross-section of the filling path, radially extending, essentially axially parallel intermediate spaces are provided in the area of the bead,
characterized, that several bead sections (5) symmetrically around the circumference of the valve housing (1) distributed radially from the outer wall protrude, between which the spaces (29 are provided, and that the bulges (4) under the bead sections (5) and engage between the spaces (25) on the valve housing outer wall. 2. Valve according to claim 1, characterized in that the Bulges (4) each in the vicinity of a tangential Surface (26) lie. 3. Valve according to claim 1 or 2, characterized in that the valve housing wall thickens in the region of the intermediate spaces (25) is trained. 4. Valve according to claim 3, characterized in that the thickened area (27) on the outer wall with respect to the respective intermediate space (25) is formed symmetrically. 5. Valve according to claim 3 or 4, characterized in that the thickened area (28) on the inner wall in relation formed symmetrically on the respective intermediate space (25) is. 6. Valve according to one of claims 1 to 5, characterized in that that the delimiting a gap (25) 030040/0407 End walls (29) of the bead sections (5) extend parallel to a main plane of the valve housing (1) through the center of the intermediate space (25). 7. Valve according to one of claims' ■ to 6, characterized by four intermediate spaces (25) or bead sections (5). 030040/0407 ORIGINAL BATHROOM