WO2013000823A1

WO2013000823A1 - Frost-resistant external wall valve for low temperatures

Info

Publication number: WO2013000823A1
Application number: PCT/EP2012/062010
Authority: WO
Inventors: Klaus Klee
Original assignee: Pipe Systems Gmbh
Priority date: 2011-06-28
Filing date: 2012-06-21
Publication date: 2013-01-03
Also published as: DE202011102932U1

Abstract

The invention relates to an external wall valve, comprising an inlet opening (3), an outlet opening (4), a liquid conducting path (5a-5f), which extends from the inlet opening to the outlet opening, a ventilation opening (91) for feeding air into the housing pipe (80), a blocking valve (20) arranged in the liquid conducting path that, in an open position, releases a liquid connection between the inlet opening and the outlet opening along the liquid conducting path through the housing pipe and, in a closed position, blocks said liquid connection, an operating handle (71) arranged at the second end of the housing pipe for moving the blocking valve from the open position to the closed position and vice versa, and a ventilation valve unit (40, 41) that, in an open position, releases an air connection between the ventilation opening and the liquid conducting path within the housing pipe and, in a closed position, blocks an air connection between the ventilation opening and the liquid conducting path within the housing pipe. According to the invention, an air conducting path (8a, 8b) extending in parallel and separately next to the liquid conducting path is present in the housing pipe in order to feed air into the housing pipe.

Description

Frost-resistant outside wall valve for low temperatures

The invention relates to an outside wall valve comprising an inlet opening at a first end of a housing tube, an outlet opening adjacent to a second end of the housing tube, a liquid line path extending from the inlet opening to the outlet opening, a ventilation opening for supplying air into the housing tube in the liquid line path arranged check valve, which in a open position, a fluid communication between the inlet and the outlet opening along the liquid line path through the housing tube and locks in a closed position, this liquid connection, arranged on the second end of the housing tube operating handle for actuating the check valve from the open position in the closed position and vice versa, and a ventilation valve unit, which in an open position an air connection between the ventilation opening and the liquid line path inn outside of the housing tube releases and in a closed position an air connection between the ventilation opening and the liquid line path within the housing tube locks.

Outer wall valves of this type are characterized in that they are designed to be used in horizontal longitudinal alignment in an outer wall to form a lying in the interior to the outer wall Wassere inlet with a water outlet lying in the outer space. The liquid line path typically extends in the horizontal direction. These outer wall valves are regularly exposed to the problem of ice formation in the interior, when the guided through this outer wall valve water freezes at minus degrees within the housing tube or in parts of the housing tube. Due to the expansion associated with this change in state of the water, parts of the outer wall valve may be damaged or even the housing tube may be blown up, thereby impairing or destroying the outer wall valve.

In the prior art, therefore, outer wall valves are known which allow ventilation of the interior for the purpose of emptying the liquid. From DE 20 2005 008 464 U1 a frost-proof outer wall valve is known, which is characterized by a valve designed as a main valve. From DE 20 2005 017 350 U1 a further frost-proof outer wall valve is previously known. In this outer wall valve, a special, diagonally extending channel is provided, which connects the ventilation valve unit with the outlet opening. From EP 1 726 725 B1, a frost-proof outer wall valve is previously known, which has emptying means for emptying the valve device in the closed functional position of the main valve, wherein these emptying means comprise a bypass line. The bypass line connects a second connecting channel section, which lies in the installed position of the valve device in the direction of gravity above a first connecting channel section, with this first connecting channel section.

With the previously known frost-proof outer wall valves frost protection can be guaranteed. However, it has been shown that in certain situations, improvements to this prior art are required. Thus, with long-term prevalence of very low minus temperatures, the functionality of the outer wall valves may be impaired, because remaining water remains freezing and impede the mobility of the components required for reliable ventilation. Furthermore, frost-proof outer wall valves often have the specific disadvantage that they have an increased flow resistance compared to outer wall valves without frost protection functions. Finally, it is desirable outer wall valves to protect against damage caused by freezing water even with incorrect operation, for example. In case of incorrect operation by the user, which prevents the flow of water from the outer wall valve, as happens for example by a connected and sealed hose. The invention has for its object to provide an outer wall valve, which overcomes these disadvantages and provides a far improved outer wall valve.

This object is achieved by the outer wall valve of the construction described above is formed by a parallel and separated adjacent to the liquid line path extending air duct path inside the housing tube for supplying air into the housing tube.

The design of a separate liquid line path and Luftleitungspfa- in the interior of the housing tube, the ventilation function and thus complete emptying of the housing tube of liquid is decisively improved. The risk that liquid residues remain in the housing tube can thereby be significantly reduced in the outer wall valve according to the invention. At the same time, an isolation effect is achieved by the provision of an air line path adjacent to the liquid line path, and it can be avoided, for example, so that liquid is in direct contact with the housing tube. A parallel and separate course of conduction path next to the liquid line path is to be understood here as meaning that the liquid line path and the air conduction path extend at least in sections within the housing tube next to one another. In this case, it is preferable for the liquid line path and the air line path to run side by side over at least one third of the length of the housing tube, preferably run side by side over more than half and in particular over more than two thirds of the total length of the housing tube. Due to the separate course of the air duct path and liquid duct path, it is also possible in particular to ensure that no liquid penetrates into the air duct path and functional elements arranged therein, for example the ventilation valve, and that this functional element is impaired by icing.

According to a first preferred embodiment, it is provided that the ventilation opening is arranged at the second end, the ventilation valve unit is arranged adjacent to the first end of the housing tube and the air line path connects the ventilation opening with the ventilation valve unit. With this embodiment, a particularly advantageous arrangement of functional elements is achieved, which are required for reliable frost protection. Thus, by arranging the ventilation valve unit adjacent to the first end of the housing tube, which is typically located in a heated interior of the building, in the outer wall of which the outer wall valve is inserted, and consequently no freezing temperatures are experienced, the function ability of this vent valve unit can be ensured in an improved manner. Through the air line path can then proceed from a ventilation opening, which is arranged at the second end, an air supply up to the ventilation valve unit and starting from this, with open ventilation valve unit, in the liquid line path. It should be understood that this advantageous arrangement of the ventilation valve unit adjacent to the second end also includes embodiments in which further functional elements, for example. The check valve or a backflow prevention component can be arranged between the vent valve unit and the second end of the housing tube. In particular, an adjacent layer may be understood to mean that the vent valve assembly is in an area that is no more than one third of the total length of the housing tube away from the first end. However, the advantageous effect according to the invention can also be achieved with embodiments in which the ventilation valve unit is farther away than this distance from the first end.

Still further, it is preferable to further develop the outer wall valve according to the invention by a fluid-conducting inner tube, which is arranged within the housing tube and extends from the first to the second end of the housing tube. Such a fluid-conducting inner tube may, in a preferred manner both in terms of manufacture and assembly, allow the provision of a fluid conduit path and an air conduit path within the housing tube in a side-by-side parallel and parallel manner. In this case, either the liquid or the air can be conducted in the inner tube itself. In particular, the inner tube may also be further subdivided to direct both liquid and air therein. The inner tube may preferably have a round cross-section, but in the same way, other tube cross-sections can be used in a deviating from the circular cross-section shape.

Still further, it is preferable that the air duct path is disposed inside a fluid-conducting inner pipe and the liquid duct path is disposed in an annular space between the inner pipe and the casing pipe, or the liquid duct path is disposed within a fluid-conducting inner pipe and the air duct path is disposed in an annular space between the inner pipe and the casing pipe. Also, this preferred embodiment is based on an inner tube within the housing tube and the previously discussed embodiments apply in the same way for this embodiment. The inner tube can either be used to guide the liquid therein. In this embodiment in particular, the ring space then used for the air duct between the inner tube and housing tube also used as a thermally insulating air layer, which further increases the frost resistance. An annular space is to be understood in a general manner as the space between the inner tube and the housing tube, and the term is not to be interpreted as spaces bounded by concentric circles in cross-section. Rather, other cross sections of the annular space deviating from the limited by concentric circles shape according to the invention can be implemented.

In an alternative embodiment, the inner tube is used to conduct air. In particular, this embodiment can provide a large passage cross-section for the liquid in the region between the inner tube and the housing tube and allows an advantageous passage of the air from a ventilation opening into the inner tube.

According to a further preferred embodiment, the outer wall valve according to the invention can be formed by a compressible, elastic material within the liquid line path. This embodiment includes a development of the outer wall valve, which is effective against damage of the outer wall valve in misuse situations. In this case, a compressible, elastic material is to be understood as meaning, in particular, a material which has at least partially, preferably completely, no liquid absorption and, instead, can be embodied, for example, as a closed porous, elastic foam or as a closed elastomer. In particular, materials having an elasticity in the range of the elasticity of silicone are suitable for this purpose. In particular, materials can be used which have a hardness of 50-60 Shore A. Further, it is preferred that the material used has a water absorption of less than 1% / 24h. An arrangement of this compressible, resilient material within the fluid conduit path is understood to mean that the material is arranged such that at least one surface of the material is in contact with the fluid within the fluid conduit path. By providing a compressible material is made possible that even if, due to incorrect operation, the liquid discharge of the housing tube is not or not completely, by the change of state and expansion of this water in a freezing no leading forces on components inside the housing tube or on the Housing tube act itself. This is achieved by compressing the compressible material under the action of the forces caused by the expansion and thereby providing the space required for this expansion. In this case, it is particularly preferred that the compressible, elastic material extends over more than a third, preferably more than half the length of the liquid line path. Such an arrangement of the compressible, elastic material makes it possible for forces acting in particular in the axial direction to be absorbed by the compressible material within the housing tube and damage due to forces thus acting to be prevented. It should be understood that the further the material extends along the length of the liquid line path, the greater the preventive effect of the compressible elastic material, and especially in the freezing-endangered region adjacent the second end of the casing tube should. In that regard, it is further preferred that the compressible elastic material, at least starting from the second end of the housing tube or the beginning of the liquid conduction path in the region of this second end by a certain length, in particular by one-third or preferably more than half the length of Liquid line path extends in the direction of the first end.

Still further, it is preferable that the compressible elastic material be tubular. By such a tubular material, a comprehensive prevention against particularly dangerous radial forces can be achieved within the housing tube by an all-round compression possibility of the elastic material is achieved.

Finally, in the embodiments with a compressible elastic material, it is further preferred that the compressible, elastic material is arranged around a profile extending in the longitudinal direction and within the housing tube, preferably around the fluid-conducting inner tube of the construction described above. This embodiment is particularly suitable when a tubular material is used as a compressible, elastic material. By arranging the compressible elastic material around a profile extending in the longitudinal direction and within the housing tube, the mechanical function and force relief are achieved in a particularly advantageous manner when the fluid line path is formed between the housing tube and this profile. In this case, the profile can be in particular a fluid-conducting inner tube of the previously explained design, preferably an inner tube which contains the air conduction path. In alternative embodiments, however, it can also be provided that the compressible, elastic material is provided in the interior of such an inner tube, if this inner tube is the liquid line path includes. In this case, it may, for example, be inserted as a hose or solid profile within this inner tube or arranged on the inner wall thereof.

According to a further preferred embodiment it is provided that the actuating handle is coupled to a hollow spindle, at the inlet opening facing end, a first locking element is arranged, which cooperates with a coupled to the housing tube second locking element to form the check valve and that the check valve in the open position releases a flow path from the inlet opening into the interior of the hollow spindle.

In principle, embodiments of outer wall valves are previously known in which a coupling element is actuated by a transmission element, typically a square or hexagonal bar, which is connected either directly or via further intermediate components coupled into the transmission with a sealing body. This sealing body can then cooperate with a further sealing element, said sealing body and the sealing element can represent a classic valve body with valve seat, which can be moved by an axial movement in the longitudinal direction of the housing tube from the open to the closed position and vice versa. In other embodiments, acting as a sealing body and sealing element superposed discs together, which have distributed openings in the circumferential direction. In this case, the open position is provided by a partial or complete overlap of these openings and brought the shut-off valve in the closed position by the two discs are pivoted relative to each other about a longitudinal axis, that these openings have no common cross-section with each other more.

In these embodiments, there is a fundamental need to provide the lowest possible flow resistance by the design of the check valve itself and by the subsequent thereto, coupled into the transmission of the actuating movement components. It is known to use this purpose elements having one or two eccentrically arranged bores to guide the liquid in the open position of the check valve through these holes, then to an annular space within the housing tube, which is formed between the actuating rod and the housing tube to infuse. According to the preferred embodiment set forth herein, these prior art outer wall valves are decisively improved in terms of flow resistance by employing a hollow spindle as a transmission body adjacent to the check valve. In this hollow spindle, consequently, the actuating movement, which emanates from the actuating handle, transmitted via the outer wall to a blocking element of the check valve and the entire interior of the hollow spindle serves for the passage of the liquid. In this case, a hollow spindle is to be understood in particular as meaning a pipe section which has an interior space completely delimited by the spindle outer wall, in particular a through-bore which runs concentrically to the central longitudinal axis and the axis of rotation of the hollow spindle and is delimited by the outer wall of the hollow spindle. The coupling of the hollow spindle with the actuating handle can be effected in particular by means of an inner tube arranged inside the housing tube, in particular by means of the inner tube according to the previously explained embodiments.

In this case, it is particularly preferred if, at the end of the hollow spindle facing the outlet opening, radial outlet openings for the passage of the liquid from the interior of the hollow spindle into a liquid path bounded by the housing tube to the outlet opening or at the end of the hollow spindle facing the outlet opening axial outlet openings for the passage of the liquid are provided from the interior of the hollow spindle in a limited by an inner tube liquid path to the outlet opening. By means of these refinements, a forwarding of the liquid from the hollow spindle in the direction of the second end of the outer wall valve, which is particularly advantageous with respect to the flow resistance, is achieved.

According to a further preferred embodiment, the outer wall valve according to the invention can be formed by a lip valve in the liquid line path having a circumferential lip extending radially outwardly from a lip valve inner body arranged and adapted to extend below one of the inlet and outlet openings acting fluid pressure gradient from the obliquely radially-axial direction of extension deformed in the direction of an axial direction of extension and a liquid path to the outlet opening, and deformed under an acting from the outlet to the inlet fluid pressure gradient from the obliquely radial-axial direction of extension in the direction of a radial direction of extension and a direction Fluid path to the outlet port blocks. A fundamental problem in the use of outside wall valves is that it is undesirable for liquid from the outside wall valve to flow backward through the inlet opening under any pressure or suction influences. In many countries, it is mandatory that external wall valves connected to the public drinking water supply network have means to reliably prevent such return flow of potentially polluted and germ-bearing water into the drinking water supply network.

In this case, it is particularly advantageous that reliable backflow prevention is achieved by this configuration without the flow resistance of the entire outer wall valve in the intended flow direction from the inlet to the outlet opening is significantly increased. The lip valve can be located in particular in an annular space which is enclosed by the housing tube. The contact surface of the lip in the closed state can be provided by the inner wall of the housing tube. In this case, it should be understood, in particular, that the lip valve possibly performs only very small deformation movements between the open and the closed position and is preferably resiliently biased into the closed position, thereby providing a secure closure upon application of a fluid pressure gradient from the outlet to the inlet opening achieved.

The embodiment of the outer wall valve having such a lip valve may be further developed by disposing the lip valve in the liquid flow path between the outlet port and the check valve. By such an arrangement of the lip valve between the outlet opening and check valve on the one hand, a compact design of the outer wall valve allows, on the other hand ensures a reliable shut-off function by the lip valve. Further preferably, it can be provided that the lip valve is attached to a lip valve body which is arranged axially movably on a central guide pin in the housing tube and is biased by a spring in a direction corresponding to the axial extension component of the lip. Such a possibility of movement of the entire lip valve in the axial direction prevents deposits from impairing the functionality of the backflow-preventing lip valve and, in particular, due to the presence in the area of the lip valve Foreign body the reliable sealing function of the lip valve is no longer guaranteed. It should be understood that the axial mobility to ensure this function can be limited to a few millimeters, in order to achieve a corresponding reliability.

Alternatively, it can be provided that the lip valve is fastened to a lip valve main body, which is arranged axially immovably on a central guide pin in the housing tube. With this embodiment, a robust design is provided, which manages with few relatively movable and juxtaposed components and in this case achieved solely on an elastic deformation of the lip of the lip valve, the sealing effect and backflow prevention.

Finally, according to a further preferred embodiment, it is provided that the following components are arranged successively in the direction of flow from the inlet to the outlet opening:

optionally in the liquid flow direction behind the inlet opening, a spring-loaded backflow preventer,

in the liquid flow direction behind the inlet opening or the optionally provided Rückströmverhinderer the check valve,

in the liquid flow direction behind the check valve, a hollow spindle for the passage of liquid,

in the liquid flow direction behind the hollow spindle, a lip valve in the liquid line path for backflow prevention,

in the liquid flow direction behind the lip valve, the outlet opening, and more preferably that the following components are arranged in the air flow direction of the ventilation opening successively to each other:

in the air flow direction behind the ventilation opening an air duct path which extends over at least one third of the length of the outer wall valve,

in the air flow direction behind the air duct path, a vent valve which is arranged to prevent the ingress of water into the air duct path upon application of a liquid pressure drop from the inlet to the outlet port and the admission of air from the air duct path into the liquid duct path in the absence of such a liquid pressure drop from the inlet - allows for the outlet opening, wherein preferably the air line path opens in a region in the liquid line path which lies in the liquid flow direction between the lip valve and the outlet opening.

With this specific construction of an outer wall valve, on the one hand, a compact and, on the other hand, functionally reliable design of a frost-proof outer wall valve is achieved. In this case, on the one hand, a sequence of the components is provided which arranges for the function important components in a range that comes due to its proximity to the first end of the housing tube in a tend to frost-proof area inside the building or within the outer wall to lie. At the same time, it is ensured by the arrangement of the ventilation path with an air line path and a ventilation valve that both this ventilation valve can be arranged in a frost-proof region of the outer wall valve and beyond a large and especially frost-prone area of the outer wall valve can be completely emptied by the aeration of liquid.

Preferred embodiments of the invention will be described with reference to the accompanying figures. Show it:

1 is a longitudinal sectional side view of a first embodiment of the outer wall valve according to the invention in a centrally broken representation,

2a, b is a detail view of the left portion of the embodiment of FIG. 1,

3 is a longitudinal sectional side view of a second embodiment of the outer wall valve according to the invention,

4 shows a view according to FIG. 3 of a third embodiment of the outer wall valve according to the invention, FIG.

5 is an exploded view of the cartridge insert of the third embodiment of FIG. 4,

6a is a detail view of the cartridge insert in the left area of Fig. 4, 6b is a sectional plan view along the line BB in Fig. 6a,

7a shows a view of the left area in FIG. 4 in a flow-through situation, FIG. 7b shows a view of the left-hand section in FIG. 4 in a ventilation pause,

8 shows a view according to FIG. 1 of a fourth embodiment of the outer wall valve according to the invention, FIG. 9 shows a view according to FIG. 4 of a fifth embodiment of the outer wall valve according to the invention,

10 is a detailed view from the left area of FIG. 9, FIG. 1 is an exploded view of the outer wall valve according to FIG. 9, FIG.

12 is an exploded view of the cartridge insert of the embodiment of FIG. 9, FIG. 13 a is a detail view of the cartridge insert of the embodiment according to FIG

Fig. 9,

13B is a plan view along the line B-B of the cartridge insert of the embodiment of FIG. 9,

14a shows a representation of the left-hand section of the embodiment according to FIG. 9 in a backflow prevention situation, FIG.

14b shows a view according to FIG. 14a in a flow-through situation,

15 is a view according to FIG. 1 of a sixth embodiment of the invention,

16a is a view of the left portion of the embodiment of FIG. 15 in a backflow prevention situation, and

16b shows a view according to FIG. 16a in a flow-through situation. Referring first to FIGS. 1 and 2b, the basic structure of an outer wall valve according to the invention is explained below. The outer wall valve extends in a longitudinal direction along a longitudinal axis 1, which lies horizontally in the installed position. A housing tube 80 extends along this longitudinal axis 1. The housing tube 80 is connected to an output terminal housing 81, this is achieved in the embodiment by a sealed screw. At the output port housing 81, an output port pipe 82 is formed. The output connection pipe 82 extends along an output axis 2 which runs obliquely to the longitudinal axis 1 and, in the installed position, points obliquely downward. To the output axis 2, an outlet opening 4 is arranged concentrically, which has a connection flange for screw connection of an adapter, hose or the like. An inlet opening 3 is arranged around the longitudinal axis 1 on the first end 6 of the outer wall valve illustrated on the left in FIG. 1, which also interacts with an external thread as a connection flange for connecting a supply line.

Starting from the inlet opening 3, a first section 5a of a liquid line path extends along the longitudinal axis 1 from the first end 6 in the direction of a second end 7 of the outer wall valve. At this first section 5a, a backflow prevention valve 10 connects. The backflow prevention valve 10 includes a backflow prevention valve body 1 1 which is pressed by means of a backflow preventive valve 13 to a closed position on a backflow preventer valve seat 12. By means of an overpressure in the first section 5a in relation to a second section 5b of the liquid line path lying downstream of this backflow prevention valve 10, the backflow prevention valve is pressed into the open position. With only a slight overpressure in this direction, a balanced pressure or a negative pressure in the section 5a relative to the section 5b, the backflow prevention valve is pressed into the closed position and prevents backflow of liquid from the second section 5b into the first section 5a.

In the flow direction behind the backflow prevention valve 10, a check valve 20 connects. The check valve 20 is formed by a locking disc 22 which is torque-fixed to the housing tube 80. This connection is by means of a screwed from the first end to the housing tube 80 check valve insert 23 scored. In the locking disc 22, two radially opposite axial passage openings 22a, b are formed, as shown in Fig. 2a can be seen.

On the locking disc 22 is a turntable 21 which is rotatable relative to the locking disc about the longitudinal axis 1. In this hub also two radially opposed axial openings 21 a, b are formed.

The turntable 21 is torque-tight with a valve spindle 31 coupled, which is part of a coupling unit 30. By means of this coupling unit 30, the valve disc 21 by means of an actuating handle 71 at the second end 7 of the outer wall valve can be rotated by 90 ° about the longitudinal axis 1. By this rotational movement, the openings 21a, b with the openings 22a, b brought into alignment with each other in order to achieve an open position of the check valve 20 or can be brought into misalignment to achieve a closed position of the check valve 20.

In addition to the valve spindle 31, the coupling unit 30 further comprises a ventilation valve housing 32 that is torque-tightly coupled to this valve spindle. The ventilation valve housing 32 is circumferentially sealed by means of an O-ring 33 with respect to the inner wall of the housing tube 80.

Liquid flowing from the second section 5b of the liquid line path through the check valve into a third section 5c of the liquid line path formed as an annulus between the housing tube 80 and the valve stem 31 may flow into a vent bore in the vent valve housing by a plurality of radial bores 34a, b. which represents a fourth section 5d of the liquid line path. From this fourth section 5 d, the liquid can in turn flow through a plurality of radial bores 35 a, b radially outwardly into a fifth section 5 e of the liquid line path, which is formed as an annular space between the housing tube 80 and an inner tube 50.

The inner tube 50 is torque-tight coupled to a vent valve stem 42, which in turn is torque-tight coupled to the vent valve housing 32. This torque-resistant connection is achieved in each case by a screw connection and serves to transmit the actuating force from the actuating handle 71 onto the rotary disk 21. Within the ventilation valve housing 32, a ventilation valve 40 is arranged, which has a ventilation valve body 41 which can bear sealingly against a ventilation valve seat 43. This vent valve body 41 is axially movable along the longitudinal axis of the position shown in FIG. 1 in a position offset to the right to the second end 7 in abutment against the vent valve seat 43.

The housing tube 50 extends from the vent valve spindle 42 along the longitudinal axis 1 to an actuating spindle 72 and is coupled with this torque-fixed, which in turn is achieved by means of a screw. The actuating spindle 72 is positively coupled to the actuating handle 71, which is achieved by means of a toothing. The actuating handle 71 and this actuating spindle 72 form an actuating unit 70. The second end 7 of the outer wall valve is covered by a valve cap 60, which has an axial opening for carrying out the toothing of the actuating handle 71. This axial bore represents a ventilation opening 91, which is formed as an annular space between the valve cap 60 and the actuating handle 71. Through this ventilation opening 91, air can flow into the fitting cap in a first portion 8a of an air duct path. From this first portion 8a, the air can continue to flow through radial vent holes 92 in the actuating spindle into a second portion 8b of the air line path extending axially from the actuating spindle through the inner tube 50 into the vent valve stem 42. With the vent valve 40 open, the air from this second section 8b of the air line path can flow into the fifth section 5e of the liquid line path, thereby allowing the fifth section 5e of the liquid line path to drain through the outlet port 4. The water flows along a sixth section 5f of the liquid line path. which extends along the output axis 2. The complete emptying of these fifth and sixth sections 5e, f of the liquid line path is assisted by a vent outlet channel 83 running diagonally downwards from the fifth section 5e, which opens into the sixth section 5f of the liquid line path.

In Fig. 2a, a longitudinal sectional side view is shown, which illustrates the flow through the outer wall valve along the liquid line path 5a-f. As can be seen, the non-return valve is open and the shut-off valve by appropriate sponding rotation of the hub 21 in the open position, so that a flow along the double arrows in Fig. 2a can be done.

FIG. 2b shows a longitudinal sectional plan view of the same section of the outer wall valve housing as in FIG. 2a.

Fig. 3 shows a second embodiment of the invention. This second embodiment is consistent with and differs from the first embodiment described above in that a silicone tube 184 is arranged on the housing tube 150, extending from the vent valve spindle 142 into the region in which the longitudinal axis 101 and the output axis 102, extends. This silicone tube serves to allow, in the case of ice formation in the fifth section 105e of the liquid line path, an increase in the volume of the fifth section 105e, which is achieved by compression of this silicone tube.

Furthermore, in this second embodiment, the O-ring 33 is dispensed with, whereby the flow resistance is reduced and a complete anti-freeze emptying is made possible. 4 shows a third embodiment of the outer wall valve according to the invention. This fourth embodiment again resembles in numerous components of the first embodiment and it is to be understood that these third and all other embodiments may be equipped with a silicone tube 184 according to the second embodiment.

Notwithstanding the first and second embodiments, the third embodiment, instead of the valve stem 31 and the vent valve housing 32, a valve hollow spindle 231 and a coupling adapter 234, which connects the valve hollow spindle 231 with a vent valve housing 232. The vent valve housing 232 is directly torque-tight coupled to the inner tube 250.

By this structurally different configuration of the third embodiment, the third portion 205 c of the liquid line path does not extend as an annular space between the valve stem 31 and the housing tube 80, as in the embodiments 1 and 2, but instead within the valve hollow spindle 231. From this hollow valve spindle, the liquid can through a plurality of radial outlet holes 234a, b directly in the fourth portion 205d of the liquid line path extending across the region formed by the fifth portion 5e in the first and second embodiments. The third embodiment according to FIG. 4 also differs from the first embodiment in that, as in the second embodiment, no seal is provided between the vent valve housing 32 and the housing tube 80 by means of an O-ring. Therefore, the air flowing along the air line path upon aeration of the liquid line path can flow through exit holes 235a, b directly into the fourth liquid line path section 205d and cause complete emptying of this fourth section 205d. Both the ventilation and complete emptying of this third embodiment over the first embodiment is improved and, moreover, the flow resistance along the liquid line path is reduced.

In FIGS. 5 and 6a, b, the assembly of non-return valve 210, check valve 220 and valve hollow spindle 231 of the third embodiment is shown in greater detail. In particular, the interaction of the locking disc 222 with the hub 221 and the two radially mutually opposite through openings 222a, b formed in the locking disc 222 and the radially opposite openings 221a, b formed in the hub 221 can be seen, which are designed as lateral recesses , Furthermore, one recognizes the positive connection caused by coupling between the hub 221 and the valve hollow spindle 231st In Fig. 7a, the third embodiment is shown in a flow along the liquid line path. In this throughflow position, the backflow prevention valve 210 is opened by the applied line pressure and the venting valve 240 is closed by this applied line pressure. The flow of water is shown by the arrows along the different sections 205a-d. The blocked connection along the air line path is shown by broken arrows.

FIG. 7b shows a functional position for emptying the liquid line path. As can be seen, the backflow prevention valve 210 is closed in this operating position and the liquid can not flow through this backflow prevention valve. The vent valve 240, however, is open and the air may flow through the radial bores 235a, b from the air line path into the liquid line path.

Fig. 8 shows a fourth embodiment of the invention, which is derived in numerous components not described here in detail from the previously described third embodiment. The fourth embodiment, like the third embodiment, has a hollow valve spindle 331 which, however, has no radial bores. Instead, the valve hollow spindle 331 is directly connected to the inner tube 350 torque-tight, which is effected by means of a screw connection.

The water flowing from the second section 305c of the liquid line path inside the valve hollow spindle 331 thereby passes directly into the inner tube 350 in the axial direction. From there it is passed on to a coupling spindle 342 which has radially outwardly directed openings to allow the passage of the liquid from the fourth Section 305d into a fifth section 305e of the liquid line path. The fifth portion 305e is formed as an annular space between the coupling spindle 342 and the output port case 381, and communicates with the sixth portion 305f in the output port pipe 382. The coupling spindle 342 is sealed by an O-ring circumferentially against the inner wall of the output port case 381. This O-ring separates the fifth portion 305e of the liquid line path from an annular space formed between the inner tube 350 and the housing tube 380. This annular space is neither part of the liquid line path nor part of the air line path in the fourth embodiment. The air line path extends from a vent opening 392 disposed radially in a sleeve bolted to the outlet port housing into a radial-axial vent channel guide 393 disposed in the actuator spindle 372. In this actuating spindle 372, the ventilation valve 340 is further arranged and prevents the escape of liquid through the ventilation channel 393 and the vent opening 392 when the check valve 320 is opened and thus prevails overpressure in the fifth portion 305e of the liquid line path from the environment. This overpressure is directed by means of radial bores 335a, b in the actuating spindle 372 into an inner cavity within this actuating spindle and closes the venting valve 340. Through these radial bores 335a, b can likewise with closed check valve and balanced pressure between the radial vent hole 392 and the fifth section 305e of Liquid flow paths and thereby cause ventilation or emptying of the portions 305c-f of the liquid line path.

Figs. 9 to 14b show a fifth embodiment of the invention. This fifth embodiment is largely identical to the third embodiment shown in FIG. 4, and only the functionally relevant differences between the third and fifth embodiments are explained below.

The fifth embodiment also has a valve hollow spindle 431 through which the third portion 405c of the liquid line path extends. This valve hollow spindle 431 differs from the valve hollow spindle 231 shown in FIG. 4 in that, instead of radial openings, it has recesses 434a, b which allow the passage of liquid from the third section 405c into the fourth section 405d.

The end of the valve hollow spindle 431 facing the second end 407 has an outer cylindrical surface on which a second non-return valve spring 416 is guided. This non-return valve spring 416 is supported on a shoulder 438 on the hollow valve spindle 431 and is designed as a compression spring.

As seen in more detail in FIG. 10, this second non-return valve spring 416 applies an elastic force to a non-return valve main body 414 that is axially slidably supported on a coupling member 434. The coupling element 434 connects torque-tight the valve hollow spindle 431 with the vent valve housing 432.

The non-return valve main body 414 can move axially from a position shown in FIG. 10 abutting a shoulder on the coupling element 434 to the left toward the first end 406 of the outer wall valve by a small distance relative to the housing tube 480 on the coupling element 434. This movement is limited by a snap ring 437 O-ring 437.

The non-return valve main body 414 has a circumferential groove in which a sealing lip 415 is disposed. This sealing lip 415 is arranged in an annular manner around the main body 414 and has a radially outwardly extending sealing lip, which is biased against the inner wall of the housing tube 480. The Sealing lip 415 is made of an elastomer and suitable for easy elastic deformation.

The sealing lip 415 divides the liquid conduit path into an annular fourth portion 405 d formed between the valve hollow spindle 431 and the housing tube 480 and a fifth portion 405 e formed between the vent valve housing 432 and the housing tube 480. The sealing lip causes, as can be seen in more detail from FIGS. 14a and 14b, an additional backflow prevention function. FIG. 14b shows an operating situation of the outer wall valve, in which a flow takes place along the liquid line path. In this case, the water can flow out of the fourth section 405d into the fifth section 405e of the liquid line path because the water pressure gradient causes the sealing lip 415 to be deformed radially inwards, thereby releasing an annular gap. In Fig. 14a, a situation is illustrated in which a fluid pressure gradient from the fifth portion 405e to the fourth portion 405d prevails. In such a pressure gradient situation, which may arise, for example, by a suction in the supply line connected to the inlet opening 403 or by an overpressure in a consumer connected to the outlet opening 404, dirty water could be forced into the drinking water network. As a result of the pressure gradient caused thereby, the backflow prevention base body 414 is displaced in the direction of the first end and the sealing lip 415 is pressed against the inner wall of the outer tube 480. As a result, the connection between the fifth portion 405e and the fourth portion 405d is blocked, preventing unwanted backflow of liquid and venting the tube for a short time.

Finally, FIGS. 15, 16 a and 16 b show a sixth embodiment of the outer wall valve according to the invention. This sixth embodiment is largely coincident with the previously explained fifth embodiment and will be explained below only with regard to the existing differences from this embodiment.

In the sixth embodiment, a hollow valve spindle 531 is provided, which is coupled torque-tight to the hub 521 at its end pointing to the first end 506 and which is torque-tightly coupled to the inner tube 450 at its second end facing the second end 507. This valve hollow spindle 531 fulfills thus integrally the function of the valve hollow spindle 431, the coupling element 434 and the vent valve stem 432 of the fifth embodiment.

In the outer circumference of this valve hollow spindle 531, in the area between the radial openings 534a, b through which the liquid flows from the third portion 505c of the liquid passage path into the fourth portion 505d and the radial ventilation holes 535a, b, there is a circumferential groove into which a sealing lip 515 is inserted is. This sealing lip is immovably fixed to the valve hollow spindle 531 and is formed in the same way for elastic deformation as the sealing lip 415 of the fifth embodiment described above.

The operation of the backflow prevention by the sealing lip 515 can be seen from FIGS. 16a, b. FIG. 16 b shows a functional situation in which the outer wall valve flows through from the inlet opening 503 to the outlet opening 504. The sealing lip 515 is for this purpose applied by deformation in the direction of an axial extension of the outer surface of the valve hollow spindle 531 and opens an annular gap for passage of liquid from the fourth section 505d in the fifth portion 505e of the liquid line path. 16a shows a blocking position in which the sealing lip 515 bears against the inner wall of the housing tube 580 and thereby prevents a passage of liquid from the fifth section 505e into the fourth section 505d. At the same time, the backflow prevention valve 510 is also in the blocking position, so that a redundant safeguard against undesired backflow of liquid into the public drinking water supply network is provided here.

Claims

claims

Outside wall valve comprising:

an inlet opening at a first end of a housing tube,

An outlet opening adjacent to a second end of the housing tube,

a liquid passageway extending from the inlet port to the outlet port,

a vent opening for supplying air into the housing tube, a check valve disposed in the liquid line path, which in an open position releases fluid communication between the inlet and outlet ports along the fluid line path through the housing tube and blocks this fluid communication in a closed position;

a arranged at the second end of the housing tube actuating handle for actuating the check valve from the open position to the closed position and vice versa, and

a vent valve assembly which, in an open position, provides air communication between the vent and the fluid conduit path within the housing tube and, in a closed position, blocks air communication between the vent and within the housing tube;

characterized by a parallel and separately adjacent to the liquid line path extending air duct path inside the housing tube for supplying air into the housing tube.

Outer wall valve according to claim 1,

characterized in that the vent opening is disposed at the second end, the vent valve unit is disposed adjacent the first end of the housing tube, and the air duct path connects the vent opening with the vent valve unit.

Outer wall valve according to claim 1 or 2,

characterized by a fluid-conducting inner tube which is disposed within the housing tube and extends from the first to the second end of the housing tube. Outer wall valve according to one of the preceding claims,

characterized in that

the air line path is arranged within a fluid-conducting inner tube and the liquid line path is arranged in an annular space between inner tube and housing tube, or

the liquid line path is arranged inside a fluid-conducting inner tube and the air line path is arranged in an annular space between inner tube and housing tube.

Outer wall valve according to one of the preceding claims,

characterized by a compressible, resilient material within the fluid conduit path.

Outer wall valve according to claim 5,

characterized in that the compressible elastic material extends over more than a third, preferably more than half the length of the liquid conduit path.

Outer wall valve according to claim 5 or 6,

characterized in that the compressible, elastic material is tubular.

Outer wall valve according to claim 5, 6 or 7,

characterized in that the compressible, elastic material is arranged around a profile extending in the longitudinal direction and within the housing tube, preferably around the fluid-conducting inner tube according to claim 3 or 4.

Outer wall valve according to one of the preceding claims,

characterized in that the actuating handle is coupled to a hollow spindle, at whose end facing the inlet opening, a first locking element is arranged, which cooperates with a coupled to the housing tube second locking element to form the check valve and

in the open position, the check valve releases a flow path from the inlet opening into the interior of the hollow spindle.

10. outer wall valve according to the preceding claim 9, characterized in that

At the end facing the outlet opening of the hollow spindle radial outlet openings for the passage of the liquid from the interior of the hollow spindle in a limited of the housing tube liquid path to

Outlet opening or

At the end facing the outlet opening of the hollow spindle axial outlet openings for the passage of the liquid from the interior of the hollow spindle in a limited of an inner tube liquid path to the outlet opening.

1 1. outer wall valve according to one of the preceding claims,

characterized by a lip valve in the liquid line path having a circumferential lip extending radially outward from a lip valve inner body arranged and adapted to extend

deformed under a liquid pressure gradient acting from the inlet to the outlet opening from the obliquely radially-axial extension direction in the direction of an axial extension direction and releases a liquid path to the outlet opening, and

is deformed from the obliquely radial-axial extension direction in the direction of a radial extension direction under a fluid pressure gradient acting from the outlet to the inlet opening and blocks a fluid path to the outlet opening.

12. outer wall valve according to the preceding claim 1 1,

characterized in that the lip valve is disposed in the liquid flow path between the outlet port and the check valve. 13. outer wall valve according to the preceding claim 1 1 or 12,

characterized in that the lip valve is mounted on a lip valve body axially movably mounted on a central guide pin in the housing tube and biased by a spring in a direction corresponding to the axial extent component of the lip.

14. outer wall valve according to the preceding claim 1 1 or 12, characterized in that the lip valve is mounted on a lip valve body which is disposed axially immovably on a central guide pin in the housing tube.

Outer wall valve according to one of the preceding claims,

characterized in that the following components are arranged successively in the direction of flow from the inlet to the outlet opening:

in the liquid flow direction behind the inlet opening or the optionally provided Rückströmverhinderer the check valve, in the liquid flow direction behind the check valve a hollow spindle for the passage of liquid,

in the liquid flow direction behind the lip valve, the outlet opening,

and more preferably that the following components are arranged in the air flow direction of the ventilation opening successively to each other:

in the air flow direction behind the air duct path, a vent valve which is arranged to prevent the ingress of water into the air duct path upon application of a liquid pressure drop from the inlet to the outlet port and the admission of air from the air duct path into the liquid duct path in the absence of such a liquid pressure drop from the inlet - allows for the outlet opening,

wherein preferably the air line path opens in a region in the liquid line path which lies in the liquid flow direction between the lip valve and the outlet opening.