EP2472012B1 - Device for guiding air to a subterranean water conduit network under terrain and use of said device - Google Patents

Description

Field of application of the invention

The invention relates to a device for guiding air on a below ground extending water pipe and their use. Ventilation of the pipeline network is required during initial or renewed commissioning and during operation to protect downstream valves and connected devices against defects and to guarantee their operational safety. Aeration of the water supply network is appropriate for preventing massive damage, namely in the event of a disaster - in the event of a major leak or breakage in the pipeline network - or if the pipeline network is intentionally emptied, as a result of which a negative pressure with the risk of line implosion would arise with respect to the atmosphere.

State of the art

The venting of the underground, underground water supply network is usually carried out at first or re-commissioning by opening the nearby hydrant hydrant. For the accident case of line break to avoid a line implosion with high damage as well as for the automatic operation venting of the line network, ventilation devices, eg from Hawle Armaturen GmbH, D-83395 Freilassing / Germany, are known (see their homepage under www.hawle.de/ products / valves and valves for cleaning valves). These equipment already cause considerable purchase and installation costs. Accommodation is usually in underground shafts. In addition to the additional maintenance, the devices are also not optimal from a hygienic standpoint, since when airing the power network hardly clean air is sucked. Above-ground manholes eliminate the hygiene problem, however, such manholes for accessibility to the maintenance of the equipment are voluminous to dimension and represent an obstacle in the spatial planning. Therefore, installations with shafts extending to above-ground only in small numbers, usually near reservoirs or other high points.

The GB 2 129 064 A discloses a hydrant with an integrated air duct assembly which effects the automatic air outflow into the atmosphere through the hydrant of a dammed up volume of air supplied to it from an underground aquifer network.

Object of the invention

In view of the considerable disadvantages of the devices and installations available on the market, the invention has for its object to provide a technically and hygienically improved and more cost-effective device for guiding air on an underground already existing or newly designed water supply network. In this case, the air control system comprises at least venting the water supply network. A further configured device should also allow air guidance in the opposite direction of flow, namely for ventilation of the water supply network.

Overview of the invention

The device designed for guiding the air of an underground water supply network has a hydrant-integrated air duct assembly, which is intended for the automatic discharge of air into the atmosphere through the hydrant of the dammed air supplied to it from the water supply network.

1. a) eine Kammer mit einem ersten Kammerende, das mit einem ersten Strömungsdurchgang verbunden ist, welcher sich durch einen ein Ventil bildenden Abschlusskörper des Hydranten erstreckt und zum Wasserleitungsnetz führt;
2. b) ein Luftventil, das an einem zweiten Kammerende angeordnet ist; und
3. c) einen Schwimmer, der in der Kammer zwischen dem ersten Kammerende und dem zweiten Kammerende beweglich geführt ist.

Die Luftführungs-Baugruppe ist einerseits starr mit dem Abschlusskörper und andererseits starr mit einer zur Betätigung des Abschlusskörpers bestimmten Ventilstange verbunden.The air duct assembly is installed in a riser of the hydrant and includes:

1. a) a chamber having a first chamber end which is connected to a first flow passage which extends through a hydrant forming a valve closing body and leads to the water pipe network;
2. b) an air valve disposed at a second chamber end; and
3. c) a float which is movably guided in the chamber between the first chamber end and the second chamber end.

The air guide assembly is on the one hand rigidly connected to the closing body and the other rigidly connected to a particular valve body for actuating the closing body.

Below are particularly advantageous details of the device called.

1. a) ein Primärteil, das am zweiten Kammerende fest angeordnet ist und einen zweiten Strömungsdurchgang hat; und
2. b) ein Sekundärteil, das zwischen dem Primärteil und dem Schwimmer beweglich angeordnet ist und einen dritten Strömungsdurchgang hat; wobei
3. c) der dritte Strömungsdurchgang eine innere, zum Schwimmer weisende, Mündung und eine äussere, mit der Atmosphäre verbundene, Mündung besitzt.

The air valve includes:

1. a) a primary part fixedly disposed at the second chamber end and having a second flow passage; and
2. b) a secondary part movably disposed between the primary part and the float and having a third flow passage; in which
3. c) the third flow passage has an inner mouth facing the float and an outer mouth connected to the atmosphere.

The float is provided with a seal for closing the inner mouth of the third flow passage. The secondary part fits sealed into the second flow passage of the primary part. The chamber has a cylindrical chamber jacket with an inner surface. Between the inner surface of the chamber shell and the float guided in the chamber remains a flow gap. The float has external elements which serve to guide the float in the chamber while maintaining the flow gap. The secondary part of the air valve has first support elements which serve to guide the chamber and to position it on the float, and second abutment elements are provided on the secondary part for positioning in the second flow passage.

• Im Normalzustand
  1. a) Der Strömungsspalt zwischen der Mantelinnenfläche der Kammer und dem Schwimmer ist so weit mit durch den ersten Strömungsdurchgang des Abschlusskörpers gelangtem Wasser aus dem Leitungsnetz gefüllt, dass der Schwimmer auftriebsbedingt mit seiner Dichtung die innere Mündung des dritten Strömungsdurchgangs am Sekundärteil des Luftventils verschliesst; und
  2. b) das Sekundärteil in das Primärteil, dessen zweiten Strömungsdurchgang verschliessend, eingeschoben ist.
• Bei automatischer Betriebsentlüftung
  1. a) Der Strömungsspalt zwischen der Mantelinnenfläche und dem Schwimmer ist so weit mit einem durch den ersten Strömungsdurchgang des Abschlusskörpers gelangten Luftvolumen aus dem Leitungsnetz gefüllt, dass der Schwimmer verminderten Auftrieb erfährt;
  2. b) die Dichtung gibt die innere Mündung des dritten Strömungsdurchgangs am Sekundärteil des Luftventils frei; dabei ist das Sekundärteil durch die herrschenden Druckverhältnisse in das Primärteil, dessen zweiten Strömungsdurchgang verschliessend, eingeschoben; und
  3. c) das Luftvolumen strömt durch den dritten Strömungsdurchgang über eine Öffnung am Hydranten in die Atmosphäre ab; wobei
  4. d) die Öffnung am Hydranten vorzugsweise oberhalb des Erdniveaus vorgesehen ist.

During operation of the pipeline network, with the closing body in the closed valve position, the following situations arise:

• In normal condition
  1. a) The flow gap between the shell inner surface of the chamber and the float is so far filled with the first flow passage of the end body water from the line network filled that the float buzzing closes with its seal, the inner mouth of the third flow passage on the secondary part of the air valve; and
  2. b) the secondary part in the primary part, the second flow passage is closed, inserted.
• With automatic operating ventilation
  1. a) The flow gap between the shell inner surface and the float is so far filled with an reached by the first flow passage of the closing body volume of air from the conduit network that the float undergoes reduced buoyancy;
  2. b) the seal releases the inner orifice of the third flow passage at the secondary part of the air valve; In this case, the secondary part by the prevailing pressure conditions in the primary part, the second flow passage closing, inserted; and
  3. c) the air volume flows through the third flow passage through an opening on the hydrant into the atmosphere; in which
  4. d) the opening on the hydrant is preferably provided above the earth level.

1. a) anfänglich ist der Schwimmer aufgrund seiner Schwerkraft in der Kammer abgesenkt, das Sekundärteil sitzt auf dem Schwimmer auf und der zweite Strömungsdurchgang ist offen, so dass die aus dem Leitungsnetz durch den ersten Strömungsdurchgang des Abschlusskörpers in die Kammer getriebene Luft durch den zweiten Strömungsdurchgang über die Öffnung am Hydranten in die Atmosphäre abströmt; und schliesslich
2. b) durch den in der Kammer sukzessive ansteigenden Wasserstand bei darin aufsteigendem Schwimmer das restliche Luftvolumen aus der Kammer durch das Luftventil über die Öffnung am Hydranten in die Atmosphäre abgeströmt ist, bis das Sekundärteil vom Schwimmer in den zweiten Strömungsdurchgang des Primärteils eingeschoben ist, somit den zweiten Strömungsdurchgang verschliesst, und die Schwimmerdichtung auch den dritten Strömungsdurchgang verschliesst.

When the mains network is first or re-commissioned, with its successive filling and the closing body in the closed valve position, the following situation arises for a starting venting:

1. a) initially, the float is lowered by gravity in the chamber, the secondary part sits on the float and the second flow passage is open, so that the driven from the conduit network through the first flow passage of the closing body in the chamber through the second air flow passage over the opening on the hydrant flows into the atmosphere; and finally
2. b) by the gradually rising in the chamber water level with it rising float the remaining air volume has flowed out of the chamber through the air valve through the opening on the hydrant into the atmosphere until the secondary part is inserted from the float in the second flow passage of the primary part, thus the closes the second flow passage, and the float seal also closes the third flow passage.

1. a) der Öffnung am Aufsatzrohr ein Sieb und/oder ein Filter vorgesetzt ist; oder
2. b) das Aufsatzrohr zumindest einen Schlauchanschluss hat, an dem die Öffnung liegt, und damit der Hydrant die Gestalt eines Überflurhydranten erhält, wobei ein Sieb und/oder ein Filter in der Öffnung oder in einer auf den Schlauchanschluss aufsetzbaren Abdeckung angeordnet sein können;
3. c) vor dem Eintritt aus dem Leitungsnetz in den ersten Strömungsdurchgang ein Grobfilter zum Schutz der Luftführungs-Baugruppe vor mechanischer Beschädigung angeordnet ist; und
4. d) ein Anschlussstück vom ersten Kammerende zum ersten Strömungsdurchgang führt.

The riser and the valve stem lead to a top tube, on which the Opening is provided, wherein:

1. a) a sieve and / or a filter is placed before the opening on the attachment tube; or
2. b) the attachment pipe has at least one hose connection at which the opening is located, and thus the hydrant is in the form of a above-ground hydrant, wherein a screen and / or a filter can be arranged in the opening or in a cover which can be placed on the hose connection;
3. c) a coarse filter to protect the air duct assembly from mechanical damage is arranged before entering the line network in the first flow passage; and
4. d) a fitting leads from the first end of the chamber to the first flow passage.

In the presence of the second flow passage above which an opening is present, which serves for the passage of air and / or spray water. The gisch water flows in the riser to a drainage opening, which preferably otherwise serves the emptying of the hydrant after use in again closed end body. The air guide assembly has a floating buoyant body designed to ascend water accumulating in the lower riser and obstruct entry into the breakthrough to prevent such water from entering the conduit network.

1. a) ist im Prinzip ein das Primärteil umgebender Kreisring; oder
2. b) ist als den Kammermantel aussen umhüllender Hohlzylinder ausgebildet; oder
3. c) setzt sich aus dem Kreisring und dem Hohlzylinder zusammen; und
4. d) ist auf seiner Schulterpartie mit einer Ringdichtung versehen, die bei aufgestiegenem Auftriebskörper mit einem sich vom Primärteil erstreckenden Kragen eine dichte Absperrung vor dem Eintritt in den Durchbruch bildet.

The buoyancy body:

1. a) is in principle a circular ring surrounding the primary part; or
2. b) is formed as the outer shell enclosing hollow cylinder; or
3. c) is composed of the circular ring and the hollow cylinder; and
4. d) is provided on its shoulder with a ring seal, which forms a sealed barrier before entering the breakthrough with ascending buoyancy body with a collar extending from the primary part.

The hydrant is installed in the aqueduct, with respect to the normal zero, preferably at an elevated level, which fills and collects air from the water mains. The device with the air guide assembly can be retrofitted to an existing hydrant.

The integrated hydrant air duct assembly is, in addition to the automatic air flow into the atmosphere through the hydrant of this from the water supply network accumulated air, also intended for automatic air flow from the atmosphere through the hydrant into the water network at low pressure occurring in the water network.

1. a) im Strömungsspalt stellt sich gegenüber der Atmosphäre ein aus dem Leitungsnetz durch den ersten Strömungsdurchgang des Abschlusskörpers fortgesetzter Unterdruck ein;
2. b) der Schwimmer sinkt in der Kammer;
3. c) das Sekundärteil fährt durch die herrschenden Druckverhältnisse aus dem Primärteil und gibt dessen zweiten Strömungsdurchgang frei; und
4. d) somit gelangt Luft aus der Atmosphäre über die Öffnung am Hydranten durch den zweiten Strömungsdurchgang, die Kammer und den ersten Strömungsdurchgang im Abschlusskörper in das Leitungsnetz.

During operation of the pipeline network, with the closing body in the closed valve position, and with automatic ventilation in the event of an accident due to a leak or deliberate emptying of the pipeline network, the following situation arises:

1. a) in the flow gap sets against the atmosphere a continued from the line network through the first flow passage of the closing body negative pressure;
2. b) the float sinks in the chamber;
3. c) the secondary part moves through the prevailing pressure conditions from the primary part and releases its second flow passage; and
4. d) thus air from the atmosphere passes through the opening at the hydrant through the second flow passage, the chamber and the first flow passage in the end body into the conduit network.

The first support elements have centrally projecting towards the float projecting lugs, which engage in a diameter constriction on the float. The diameter constriction ends at the top of a radially projecting annular shoulder, which acts as a suspension with sunken float. The secondary part has an annular gap lying above the annular shoulder and distributed over the circumference in sections, which serves as a filter in order to retain impurities.

1. a) ein Primärteil, das am zweiten Kammerende fest angeordnet ist und einen Durchbruch hat, der in die Atmosphäre führt;
2. b) ein Sekundärteil, das integraler Bestandteil des Primärteils oder mit diesem fest verbunden ist und einen dritten Strömungsdurchgang hat;
3. c) am dritten Strömungsdurchgang eine innere, zum Schwimmer weisende Mündung und eine äussere, mit der Atmosphäre verbundene Mündung;
4. d) oben am Primärteil ein Widerlager, an dem sich eine Feder abstützt, welche auf ein Absperrelement wirkt, das den dritten Strömungsdurchgang verschliesst, so dass ein Rückschlagventil entsteht; wobei
5. e) sich das Rückschlagventil bei definiertem Druck des in die Luftführungs-Baugruppe aus dem Wasserleitungsnetz zugeflossenen aufgestauten Luftvolumens für den automatischen Luftabfluss in die Atmosphäre durch den Hydranten öffnet.

Alternatively, the air valve includes:

1. a) a primary part, which is fixedly disposed at the second end of the chamber and has a breakthrough, which leads to the atmosphere;
2. b) a secondary part which is integral with or integral with the primary part and has a third flow passage;
3. c) at the third flow passage, an inner mouth facing the float and an outer mouth connected to the atmosphere;
4. d) at the top of the primary part of an abutment on which a spring is supported, which acts on a shut-off, which closes the third flow passage, so that a check valve is formed; in which
5. e) opens the check valve at a defined pressure of accumulated in the air guide assembly from the water network accumulated air volume for the automatic air outflow into the atmosphere through the hydrant.

Brief description of the attached drawings

Figur 1A -

einen im Gelände installierten Hydranten, in Gestalt eines Überflurhydranten mit Aufsatzrohr, oberem Steigrohr, darunter angeordnetem unterem Steigrohr und Einlaufbogen, mit angeschlossener Zuleitung und Weiterführung zum Leitungsnetz, mit dem Abschlusskörper in geschlossener Ventilstellung, als Teilschnitt;

Figur 1B -

das vergrösserte Detail X1 aus den Figuren 1A und 3;

Figur 1C -

die Darstellung gemäss Figur 1B, mit der Luftführungs-Baugruppe in einer ersten Variante im Normalzustand, im Teilschnitt durch Abschlusskörper und Luftführungs-Baugruppe;

Figur 1D -

die Darstellung gemäss Figur 1C im Schnitt durch das Luftventil der Luftführungs-Baugruppe erster Variante;

Figur 1E -

das vergrösserte Detail X2 aus Figur 1C;

Figur 1F -

das vergrösserte Detail X3 aus Figur 1 D;

Figur 2A -

die Darstellung gemäss Figur 1A, mit dem Abschlusskörper in offener Ventilstellung, als Teilschnitt;

Figur 2B -

das vergrösserte Detail X4 aus Figur 2A;

Figur 3 -

die Darstellung gemäss Figur 1A, mit einem modifizierten Aufsatzrohr, als Teilschnitt;

Figur 4A -

die Darstellung gemäss Figur 1C, mit der Luftführungs-Baugruppe erster Variante bei automatischer Betriebsentlüftung, im Teilschnitt durch Abschlusskörper und Luftführungs-Baugruppe;

Figur 4B -

die Darstellung gemäss Figur 3A im Schnitt durch das Luftventil der Luftführungs-Baugruppe erster Variante;

Figur 4C -

das vergrösserte Detail X5 aus Figur 4A;

Figur 4D -

das vergrösserte Detail X6 aus Figur 4B;

Figur 5A -

die Darstellung gemäss Figur 1C, mit der Luftführungs-Baugruppe erster Variante bei automatischer Belüftung im Havariefall, im Teilschnitt durch Abschlusskörper und Luftführungs-Baugruppe;

Figur 5B -

die Darstellung gemäss Figur 5A im Schnitt durch das Luftventil der Luftführungs-Baugruppe erster Variante;

Figur 5C -

das vergrösserte Detail X7 aus Figur 5A;

Figur 5D -

das vergrösserte Detail X8 aus Figur 5B;

Figur 6A -

die Darstellung gemäss Figur 1A, mit der Luftführungs-Baugruppe zweiter Variante, als Teilschnitt;

Figur 6B -

das vergrösserte Detail X9 aus Figur 6A, mit der Luftführungs-Baugruppe zweiter Variante im Normalzustand, unabgedichtet, als Teilschnitt;

Figur 6C -

die Darstellung gemäss Figur 6B, im Normalzustand, abgedichtet, als Teilschnitt;

Figur 7A -

das vergrösserte Detail X9 aus Figur 6A, mit der Luftführungs-Baugruppe dritter Variante im Normalzustand, unabgedichtet, als Teilschnitt;

Figur 7B -

die Darstellung gemäss Figur 7A, im Normalzustand, abgedichtet, als Teilschnitt;

Figur 8A -

das vergrösserte Detail X9 aus Figur 6A, mit der Luftführungs-Baugruppe vierter Variante im Normalzustand, unabgedichtet, als Teilschnitt;

Figur 8B -

die Darstellung gemäss Figur 7A, im Normalzustand, abgedichtet, als Teilschnitt;

Figur 9A -

das vergrösserte Detail X1 aus Figur 1A mit der Luftführungs-Baugruppe fünfter Variante im Normalzustand, als Teilschnitt;

Figur 9B -

die Darstellung gemäss Figur 9A, mit der Luftführungs-Baugruppe bei automatischer Betriebsentlüftung, als Teilschnitt;

Figur 9C -

die Darstellung gemäss Figur 9A, mit der Luftführungs-Baugruppe bei automatischer Belüftung im Havariefall, als Teilschnitt;

Figur 10A -

das vergrösserte Detail X1 aus Figur 1A mit der Luftführungs-Baugruppe sechster Variante im Normalzustand, als Teilschnitt; und

Figur 10B -

die Darstellung gemäss Figur 10A, mit der Luftführungs-Baugruppe bei automatischer Betriebsentlüftung, als Teilschnitt.

Show it:

Figure 1A -

a hydrant installed in the field, in the form of an above-ground hydrant with attachment tube, upper riser, below arranged lower riser and inlet bend, with connected supply and continuation to the network, with the closing body in the closed valve position, as a partial section;

FIG. 1B -

the enlarged detail X1 from the Figures 1A and 3 ;

FIG. 1C

the representation according to FIG. 1B , with the air guide assembly in a first variant in the normal state, in partial section through end body and air guide assembly;

FIG. 1D -

the representation according to Figure 1C in section through the air valve of the air guide assembly of the first variant;

FIG. 1E -

enlarged detail X2 Figure 1C ;

FIG. 1F -

enlarged detail X3 FIG. 1 D;

Figure 2A -

the representation according to Figure 1A , with the closing body in open valve position, as a partial section;

FIG. 2B -

enlarged detail X4 FIG. 2A ;

FIG. 3 -

the representation according to Figure 1A , with a modified extension tube, as a partial section;

FIG. 4A -

the representation according to Figure 1C , with the air duct assembly of the first variant with automatic operating ventilation, in the partial section through the closing body and air duct assembly;

FIG. 4B -

the illustration according to Figure 3A in section through the air valve of the air guide assembly of the first variant;

FIG. 4C -

enlarged detail X5 FIG. 4A ;

FIG. 4D -

enlarged detail X6 FIG. 4B ;

FIG. 5A

the representation according to Figure 1C , with the air duct assembly of the first variant with automatic ventilation in case of an accident, in partial section through end body and air duct assembly;

FIG. 5B -

the representation according to FIG. 5A in section through the air valve of the air guide assembly of the first variant ;

FIG. 5C -

enlarged detail X7 FIG. 5A ;

FIG. 5D -

enlarged detail X8 FIG. 5B ;

FIG. 6A -

the representation according to Figure 1A , with the air guide assembly of the second variant, as a partial section;

FIG. 6B -

enlarged detail X9 FIG. 6A , with the air guide assembly of the second variant in the normal state, unsealed, as a partial section;

FIG. 6C -

the representation according to FIG. 6B , in normal condition, sealed, as partial section;

FIG. 7A -

enlarged detail X9 FIG. 6A , with the air duct assembly third variant in the normal state, unsealed, as a partial section;

FIG. 7B -

the representation according to FIG. 7A , in normal condition, sealed, as partial section;

FIG. 8A -

enlarged detail X9 FIG. 6A , with the fourth version air duct assembly in the normal state, unsealed, as a partial section;

FIG. 8B -

the representation according to FIG. 7A , in normal condition, sealed, as partial section;

FIG. 9A -

enlarged detail X1 Figure 1A with the air duct assembly fifth variant in the normal state, as a partial section;

FIG. 9B -

the representation according to Figure 9A , with the air guide assembly with automatic operating ventilation, as a partial section;

FIG. 9C -

the representation according to Figure 9A , with the air guide assembly with automatic ventilation in case of accident, as a partial section;

FIG. 10A -

enlarged detail X1 Figure 1A with the air duct assembly sixth variant in the normal state, as a partial section; and

FIG. 10B

the representation according to Figure 10A , with the air guide assembly with automatic operating ventilation, as a partial section.

embodiment

With reference to the accompanying drawings, the following detailed description of an embodiment of the inventive device for loading and / or venting in the area underground water supply network using the example of a land in the all-and connected to the water network hydrant. The top pipe installed above the hydrant is designed in two versions.

The following definition applies to the entire further description. If reference numerals are included in a figure for the purpose of graphic clarity, but are not explained in the directly associated description text, reference is made to their mention in the preceding or following description of the figures. In the interest of clarity, the repeated designation of components in other figures is usually dispensed with, as far as the drawing clearly shows that they are "recurring" components.

Figures 1A and 1B and 2A and 2B

The hydrant 9 - in the example shown, a conventional Überflurhydrant - has the top of the top tube 91, which extends above the earth level E in height. The attachment tube 91 has the usual components, such as cap and hose connection 910, at which the opening 911 opens to the water outlet. When not in use, the hose fitting 910 and opening 911 are usually protected with an attachable cover 912 . At the top tube 91 , a spindle extension 84 is further accessible for actuating the end body 7 with its valve function. At the top tube 91 , the upper riser 92 joins, in which the known components, such as spindle bearings 83, spindle 82 and spindle nut 81 are arranged. From the spindle nut 81 , the valve rod 8 extends downward. The upper riser 92 inserted telescopically height adjustable in the lower riser 93 to adjust the hydrant 9 to the given at the respective location grave depth G , which is the distance between the earth level E and the lower edge of the means connected by the screw ring 95 on the inlet bend 94 supply line 96 is defined. The principle of such a height-adjustable hydrant is the subject of EP 0 717 156 B1 , The supply line 96 leads to the water network 97.

Between the lower end of the valve rod 8 and the end body 7 , the air guide assembly 1 first variant is arranged, which initially consists essentially of a cylindrical chamber 10 surrounded by a jacket 13 , at its lower first end 101, a tubular connecting piece 11 to the closing body. 7 leads. To the upper second chamber end 102 , an air valve 16 sets, which in turn is connected to the lower end of the valve rod 8 . The air valve 16 has a primary part 160 , which represents the connection between the valve rod 8 and the second chamber end 102 . In the interior of the riser tubes, the primary part 160 has 92.93 opens passages 161. The valve function of the final body 7 is formed by the cooperation of the closing component 7 mounted valve seal 71 and the existing pipe 93 at the lower riser valve seat 70th

When the valve position is closed (s. FIGS. 1A and 1B ), the closing body 7 is lowered so far that the valve seal 71 rests sealingly in the valve seat 70 . In this case, the drainage seal 78 releases the drainage opening 78 , which leads via the drainage arch 79 into the ground. The drainage opening 78 serves for emptying the hydrant 9 after use with the closing body 7 closed again . Before entering from the line network 97 into the first flow passage 76 (see FIG. Figure 1C ), a coarse filter 75 is arranged to protect the air guide assembly 1 from mechanical damage.

With open valve position (s. FIGS. 2A, 2B ) - as a result of actuation on the spindle extension 84 - the closing body 7 is raised, so that between valve seal 71 and valve seat 70, an open annular gap for water passage is formed. Now the drainage seal 78 obstructs the drainage opening 77.

FIGS. 1C to 1F (normal state)

In this sequence of figures, it is assumed that the pipeline network 97 is in operation. The closing body 7 is still in the closed valve position and the air guide assembly 1 first variant in the normal state, ie neither runs an automatic operating ventilation of the line network 97 (s. Figures 4A-4D ) nor an automatic ventilation of the pipeline network 97 in the event of an accident (s. Figures 5A-5D ).

1. a) die Kammer 10 mit dem ersten Kammerende 101, das mit dem ersten Strömungsdurchgang 76 verbunden ist, welcher sich durch den das Ventil bildenden Abschlusskörper 7 des Hydranten 9 erstreckt und zum Wasserleitungsnetz 97 führt;
2. b) das Luftventil 16, das am zweiten Kammerende 102 angeordnet ist; und
3. c) den Schwimmer 15, der in der Kammer 10 zwischen erstem Kammerende 101 und zweitem Kammerende 102 beweglich geführt ist.

The air guide assembly 1 includes:

1. a) the chamber 10 with the first chamber end 101, which is connected to the first flow passage 76 which extends through the closing body 7 forming the valve of the hydrant 9 and leads to the water network 97 ;
2. b) the air valve 16 located at the second chamber end 102 ; and
3. c) the float 15, which is movably guided in the chamber 10 between the first chamber end 101 and the second chamber end 102 .

1. a) das Primärteil 160, das am zweiten Kammerende 102 fest angeordnet ist und den zweiten Strömungsdurchgang 162 hat; und
2. b) das Sekundärteil 165, das zwischen Primärteil 160 und Schwimmer 15 beweglich angeordnet ist und den dritten Strömungsdurchgang 168 hat; wobei
3. c) der dritte Strömungsdurchgang 168 die innere, zum Schwimmer 15 weisende Mündung, und die äussere, mit der Atmosphäre verbundene, Mündung besitzt.

The air valve 16 includes:

1. a) the primary part 160, which is fixedly disposed on the second chamber end 102 and the second flow passage 162 has; and
2. b) the secondary part 165, which is arranged movably between primary part 160 and float 15 and has the third flow passage 168 ; in which
3. c) the third flow passage 168 has the inner mouth facing the float 15 and the outer mouth connected to the atmosphere.

The float 15 is provided with the seal 151 for closing the inner mouth of the third flow passage 168 . The secondary part 165 is seated sealed in the second flow passage 162 of the primary part 160. The chamber 10 has the cylindrical chamber jacket 13 with the inner surface 130. Between the inner surface 130 of the chamber shell 13 and guided in the chamber 10 float 15 , the flow gap remains 14. The float 15th has outer elements 150, which serve to guide the float 15 in the chamber 10 with retention of the flow gap 14 . The secondary part 165 of the air valve 16 has first support elements 166, which serve to guide the chamber 10 and the positioning on the float 15 . At the secondary part 165 second support elements 167 are provided for positioning in the second flow passage 162 . The air guide assembly 1 is on the one hand rigidly connected to the closing body 7 and on the other hand rigidly connected to the valve body 8 intended for actuating the closing body 7.

In the current normal state of the flow gap 14 between the inner shell surface 130 of the chamber 10 and the float 15 so far filled with the first flow passage 76 of the end body 7 water from the network 97 filled that the float 15 buoyancy due to its seal 151, the inner mouth of the third flow passage 168 on Sekun därteil 165 of the air valve 16 closes and the secondary part 165 in the primary part 160, the second flow passage 162 is closed, inserted. The seal is effected by a seal 163 inserted in the secondary part 165 , which presses against the primary part 160 .

The opening 911 on the hose connection 910 on the attachment tube 91 is preferably provided with a sieve and / or filter. Above the second flow passage 162 there is an opening 161 , which serves for the passage of air and / or spray water in operating states to be described later. Such Spray water would flow through the riser 93 of the drainage opening 77 , which otherwise serves to empty the hydrant 9 after use with the closing body 7 closed again.

FIG. 3

In modification to the Figures 1A and 2A lead here the riser 92,93 and the valve rod 8 to a top tube 91, which has no hose connection 910 , but only to the Erdniveau E increased positioning of the opening 911 is provided. This configuration of the hydrant 9 serves only as a device for loading and / or venting a pipe network 97, not at the same time primarily as a water tap. The distance to the ground level E 911 ensures the automatic ventilation in case of accident (s. FIGS. 5A to 5D ) the suction of dust-free air. To further improve the air, the opening 911, which opens below a cover 912 arranged on the top tube 91 , can be preceded by a sieve 914 and / or a filter 913 .

FIGS. 4A to 4D (automatic operating ventilation)

In this sequence of figures continues to be based on the ongoing operation of the line network 97 . The closing body 7 is unchanged in the closed valve position. By means of the air guide assembly 1 runs an automatic operation venting of the pipeline network 97 .

The flow gap 14 between the shell inner surface 130 and the float 15 is so far filled with a passing through the first flow passage 76 of the end body 7 air volume 12 from the conduit network 97 that the float 15 undergoes reduced buoyancy, with its seal 151, the inner mouth of the third Flow passage 168 at the secondary part 165 of the air valve 16 releases, while the secondary part 165 by the prevailing pressure conditions in the primary part 160, the second flow passage 162 is closed, inserted and the air volume 12 escapes through the third flow passage 168 . From here, the air volume 12 passes through the opening 161 in the primary part 160 in the upper riser 92 to the opening 911 on the hydrant 9 to flow into the atmosphere. Eventually by the third Flow passage 168 spraying spray water flows through the lower riser 93 to the drainage opening 77 and exits into the soil.

Figures 5A to 5D (automatic ventilation in case of emergency)

Also in this sequence of figures continues to be based on the ongoing operation of the line network 97 . The closing body 7 is in the closed valve position. By means of the air guide assembly 1 first variant runs an automatic ventilation of the pipe network 97 in case of accident, in case of line break, from.

In the flow gap 14 , a negative pressure, which continues from the line network 97 through the first flow passage 76 of the end body 7 , is established in relation to the atmosphere. Thus, the float 15 sinks in the chamber 10, the secondary part 165 moves through the prevailing pressure conditions from the primary part 160 and thus releases the second flow passage 162 free. Now, air from the atmosphere via the opening 911 at the hose connection 910 through the top tube 91 and the upper riser 92, the opening 161 and the second flow passage 162 in the primary part 160, the flow gap 14 in the chamber 10 and the first flow passage 76 in the closing body. 7 to get into the network of lines 97 to compensate for the resulting from the accident vacuum.

In this state, with the float 15 lowered to the first end of the chamber 101 and the secondary part 165 pushed out of the primary part 160 , the device is also in the delivery state or before being put into operation.

FIGS. 6A to 8B (normal state)

In this sequence of figures, the air guide assembly 1 is shown unsealed and sealed in the second to fourth variant , starting from the ongoing operation of the line network 97 (s. Figures 1C-1F ). The closing body 7 is in the closed valve position and the air guide assembly 1 in the normal state, ie there is no automatic operating ventilation of the line network 97 (s. Figures 4A-4D ). The in case of emergency automatically operated ventilation of the network 97 (s. Figures 5A-5D ) is only possible in the unsealed situation described later.

1. a) einen verschieden gestaltbaren Auftriebskörper 17 mit einer daran vorhandenen Schulterpartie 170, die zur Aufnahme einer Ringdichtung 171 dient; und
2. b) einen Kragen 164, der sich vom Primärteil 160 zunächst radial erstreckt und, beabstandet zu den Durchbrüchen 161, in Richtung Auftriebskörper 17 abknickt und mit einem freien Ende abschliesst, das zum Aufsetzen auf die Ringdichtung 171 bestimmt ist.

The air guide assembly 1 in the second to fourth variants comprises in addition to the first variant (s. Figures 1C-1F ):

1. a) a differently shaped buoyancy body 17 with an existing shoulder portion 170, which serves to receive a ring seal 171 ; and
2. b) a collar 164, which initially extends radially from the primary part 160 and, spaced apart from the openings 161, bends in the direction of buoyant body 17 and terminates with a free end, which is intended for placement on the ring seal 171 .

The air guide assembly 1 in the second to fourth variant causes, for example, as a result of flooding in the hydrant 9 pending contaminated water, which could reach via the drainage hole 77 in the lower riser 93 in the hydrant 9 , can not flow into the network 97 .

FIG. 6B (unsealed).

In the air guide assembly 1 in the second variant of the buoyancy body 17 is of annular shape, which preferably consists of plastic, with its outer periphery quasi flush with the shell 13 and in the absence of buoyancy on the inclined surface of the primary part 160 - adjacent the upper chamber end 102nd - sits up. At the top of the buoyant body 17 has the shoulder portion 170, on which the ring seal 171 sits. Between the ring seal 171 and the free end of extending from the primary part 160 collar 164 remains an open gap, since no contaminated water is present in the hydrant 9 and thus the buoyancy body 17 is not raised, so that the air guide assembly 1 is unsealed.

FIG. 6C (sealed)

As a result of flooding could be accessed via the drainage opening 77 in the lower riser 93 contaminated water in the hydrant 9 and stands there. This causes the lifting of the buoyant body 17, so that the Ring seal 171 is pressed against the free end of the collar 164 and creates a sealing point. This prevents polluted water from the hydrant 9 via the air valve 16 into the chamber 10 and from there via the connector 11, the first flow passage 76, the inlet bend 94 and the supply line 96 enters the line network 97 .

Characters. 7A and 7B

In the air guide assembly 1 in the third variant , the buoyant body 17 is formed as the shell 13 outside umhüllender and axially upwardly moving in buoyancy hollow cylinder. The buoyant body 17 has at the top the shoulder portion 170, in which the ring seal 171 sits. In the unsealed state remains at gravity lowered buoyancy body 17, an open gap between the ring seal 171 and the free end of the collar 164 (s. FIG. 7A ). In the sealed state, the gap between the ring seal 171 and the free end of the collar 164 is closed when the buoyant body 17 is raised (see FIG. FIG. 7B ), so that no contaminated water from the hydrant 9 can get into the network 97 .

Figures 8A and 8B

In the air guide assembly 1 in the fourth variant , the buoyant body 17 is made according to the annular segment Figures 6A-6C and the hollow cylinder according to FIGS. 7A + 7B together. The ring seal 171 sits on top of the shoulder portion 170 of the annular segment. In the unsealed state, an open gap between the annular seal 171 and the free end of the collar 164 remains, in the case of a buoyant body 17 lowered by gravity (see FIG. Figure 8A ). Due to the thus enlarged volume of this buoyant body 17 , the seal between the ring seal 171 and the free end of the collar 164 intensifies at higher buoyancy lifted buoyant body 17. The gap between ring seal 171 and collar 164 has closed; it can not get contaminated water from the hydrant 9 in the pipe network 97 (s. FIG. 8B ).

FIGS. 9A to 9C

In the case of the air guide assembly 1 in the fifth variant , the secondary part 165 of the air valve 16 with the first support elements 166 is accommodated on the float 15 in an axially limited manner. Projecting lugs 169 of the first support elements 166 engage in a diameter constriction 153 on the float 15 , which ends at the top of a radially projecting annular shoulder 152 . The secondary part 165 has below the seal 163 lying above the annular shoulder 152 , distributed over the circumference in sections annular gap S. The annular gap S serves as a filter to retain contaminants that rinsed in the water through the first flow passage 76 of the end body 7 in the flow gap 14 become.

In normal condition (s. Figure 9A ), the float seal 151 and the third flow passage 168 are closed because there is water in the flow gap 14 and thus raised the float 15 , which in turn pushes the secondary part 165 up against the primary part 160 , so that the second flow passage 162 is closed. Within the diameter constriction 153 , the lugs 169 come to lie virtually at the bottom stop.

Before activating the automatic operating ventilation (s. FIG. 9B Air enters the flow gap 14 from the conduit network 97 , so that the float 15 drops until the annular shoulder 152 is seated on the lugs 169 . Due to the greater internal pressure relative to the atmospheric pressure remains the secondary part 165, as at Figure 9A , in the top position. By the disengagement of the float seal 151 opens the third flow passage 168, and thus escapes accumulated air volume 12 through the openings 161 in the primary part 160 to ultimately in the atmosphere.

The automatic ventilation (s. FIG. 9C ) is activated when a negative pressure arises in the line network 97 . Thus, the float 15 decreases, and at the same time moves the secondary part 165 from the primary part 160 downwards until the lugs 169 come to lie virtually at the bottom stop within the diameter constriction 153 . In this situation, the second flow passage 162 is open so that atmospheric air can be sucked into the conduit network 97 via the openings 161.

Figures 10A and 10B

The air guide assembly 1 of the sixth variant can be operated only in the normal state and with automatic ventilation. The second flow passage 162 is omitted here. The secondary part 165 is immovably fixedly connected to the primary part 160. Centrally at the top of the primary part 160, a disc-shaped abutment 190 is arranged, on whose underside a spring 19 is supported. This spring 19 acts on a spherical shut-off element 18, which closes the third flow passage 168, so that a check valve is formed. The upwardly directed second support element 167 forms a vertical guide for the shut-off element 18.

In normal condition (s. Figure 10A ), the float seal 151 and the third flow passage 168 are closed again. Water is present in the flow gap 14 , and the float 15 is raised, so that the lower stop of the diameter constriction 153 has approached the lugs 169 . The bias of the spring 19 acting on the shut-off element 18 keeps the third flow passage 168 closed.

When automatic air venting is activated (s. FIG. 10B ), the float 15 lowers , and the previous barrier between the float seal 151 and the third flow passage 168 is opened. Thus, the pressure of the volume of air intended for the removal 12 penetrates into the third flow passage 168 and causes a lifting of the shutoff 18 against the spring 19, so that the air volume 12 through the outlet A in the second support member 167 and the openings 161 in the primary part 160 in the Atmosphere drains off.

First or renewed commissioning of the pipeline network

The situation of the air guide assembly 1 when drawing up the pipeline network 97 for the first time or again , with its successive filling and the closing body 7 in the closed valve position, is not shown separately in the drawing for a starting vent. For completeness, however, the phase will be described below with reference to the existing figures.

Initially, due to its gravity, the float 15 is lowered in the chamber 10 , the secondary 165 sits on the float 15 , and the second flow passage 162 is open. Thus, the air driven from the conduit network 97 through the first flow passage 76 of the end body 7 into the chamber 10 can flow out through the second flow passage 162, the aperture 161, the upper riser 92 and the attachment tube 91 via the opening 911 into the atmosphere. Particularly when commissioning the pipeline network 97 , the removal of spray water injected via the first flow passage 76 and the connecting piece 11 into the chamber 15 via the second flow passage 162, the opening 161 and down in the lower riser 93 to the drainage opening 77 is relevant.

Finally, as a result of the float 15 rising successively in the chamber 10, the remaining air volume 12 has flowed out of the chamber 10 through the air valve 16 via the opening 911 into the atmosphere with the float 15 rising there. At the end of this process, the secondary part 165 is pushed by the float 15 into the second flow passage 162 of the primary part 160 . Thus, the second flow passage 162 and by means of the pressed-float seal 151 and the third flow passage 168 are closed, so that the normal state according to the FIGS. 1C to 1F; 6B and 6C; 7A and 7B; 8A and 8B as well as 9A.

Due to the structural modification in the air guide assembly 1 according to the sixth variant (s. FIG. 10B ), the process is slightly different. Initially, the float 15 is again lowered by gravity into the chamber 10 and is thus spaced from the stationary secondary 165. The float seal 151 clears the entrance to the third flow passage 168 , however, the shut-off element 18 first closes the outlet of the flow passage 168. The rising pressure of the discharged from the mains network 97 air volume causes lifting of the shut-off element 18 of Outlet of the flow passage 168 against the spring 19, so that the air volume 12 via the outlet A in the second support member 167 and the openings 161 in the primary part 160 can flow into the atmosphere. Finally, as a result of the float 15 rising successively in the chamber 10, the remaining air volume 12 has flowed out of the chamber 10 through the air valve 16 via the opening 911 into the atmosphere with the float 15 rising there. At the end of this process, the float 15 is moved with its float seal 151 by buoyancy up against the fixed secondary part 165 and thus closes the entrance to the third flow passage 168. At the same time, the outlet of the flow passage 168 is closed by the shut-off element 18 pressed by the spring 19 ,

Claims (14)

1. Device for guiding air in a mains water network (97) that extends underground outdoors, having a hydrant and having an air-guiding assembly (1) integrated in the hydrant (9), intended for automatically discharging into the atmosphere, through the hydrant (9), a built-up air volume (12) that has flowed into the latter from the mains water network (97), characterized in that the airguiding assembly (1):

   a) is installed in a riser pipe (92,93) of the hydrant (9);

   b) comprises:

   ba) a chamber (10) having a first chamber end (101) which is connected to a first flow passage (76) which extends through a terminating body (7), forming a valve, of the hydrant (9) and leads to the mains water network (97);

   bb) an air valve (16) which is arranged at a second chamber end (102); and

   bc) a float (15) which is guided movably in the chamber (10) between the first chamber end (101) and the second chamber end (102); and

   c) is connected rigidly to the terminating body (7) on one side and rigidly to a valve rod (8), intended for actuating the terminating body (7), on the other side.
2. Device according to Claim 1, characterized in that the air valve (16) comprises:

   a) a primary part (160) which is arranged fixedly at the second chamber end (102) and has a second flow passage (162), above which an aperture (161) is present; and

   b) a secondary part (165) which is arranged in a movable manner between the primary part (160) and the float (15) and has a third flow passage (168); wherein

   c) the third flow passage (168) has an internal mouth facing the float (15) and an external mouth connected to the atmosphere.
3. Device according to Claim 1, characterized in that the riser pipe (92,93) and the valve rod (8) lead to an attachment pipe (91) in which an opening (911) is provided, wherein:

   a) a screen (914) and/or a filter (913) is/are positioned in front of the opening (911) in the attachment pipe (91); or

   b) the attachment pipe (91) has at least one hose connector (910) in which the opening (911) is present, and thus the hydrant (9) obtains the form of a surface hydrant, wherein a screen and/or a filter can be arranged in the opening (911) or in a cover (912) that is placeable on the hose connector (910);

   c) a coarse filter (75) for protecting the air-guiding assembly (1) from mechanical damage is arranged upstream of the inlet from the mains network (97) into the first flow passage (76); and

   d) a connection piece (11) leads from the first chamber end (101) to the first flow passage (76).
4. Device according to Claim 2, characterized in that

   a) the float (15) is provided with a seal (151) for closing off the internal mouth of the third flow passage (168);

   b) the secondary part (165) passes into the second flow passage (162) of the primary part (160) in a sealed-off manner;

   c) the chamber (10) has a cylindrical chamber casing (13) with an internal surface (130);

   d) a flow gap (14) remains between the internal surface (130) of the chamber casing (13) and the float (15) guided in the chamber (10);

   e) the float (15) has external elements (150) which serve to guide the float (15) in the chamber (10), with the flow gap (14) being maintained; and

   f) the secondary part (165) of the air valve (16) has first supporting elements (166) which serve for guiding in the chamber (10) and for positioning on the float (15), and second supporting elements (167) for positioning in the second flow passage (162) are provided on the secondary part (165).
5. Device according to Claim 2, characterized in that the air valve (16) comprises:

   a) the primary part (160), which is arranged fixedly at the second chamber end (102) and has the aperture (161) that leads into the atmosphere; and

   b) the secondary part (165), which is an integral constituent of the primary part (160), or is firmly connected thereto, and has the third flow passage (168);

   c) at the third flow passage (168), an internal mouth facing the float (15) and an external mouth connected to the atmosphere;

   d) at the top of the primary part (160), a counter bearing (190) which supports a spring (19) which acts on a shut-off element (18) that closes off the third flow passage (168), such that a non-return valve is produced; and

   e) the non-return valve opens at a defined pressure of a built-up volume (12) that has flowed into the air-guiding assembly (1) from the mains water network (97), in order to automatically discharge the air into the atmosphere through the hydrant (9).
6. Device according to Claim 2 or 3, characterized in that the air-guiding assembly (1) has a movable buoyancy body (17) which is intended to rise in the event of water collecting in the lower riser pipe (93) and to shut off the inlet into the aperture (161), so as to prevent such water from being able to pass into the mains network (97).
7. Device according to Claim 4, characterized in that

   a) the first supporting elements (166) have protruding lugs (169) that are directed centrically towards the float (15) and engage in a diameter constriction (153) on the float (15);

   b) the diameter constriction (153) ends at the top in a radially protruding annular shoulder (152) which acts as a suspension means when the float (15) is in a sunk state; and

   c) the secondary part (165) has an annular gap (S) that is located above the annular shoulder (152) and is distributed in sections around the circumference, said annular gap (S) acting as a filter in order to retain impurities.
8. Device according to Claim 6, characterized in that the buoyancy body (17):

   a) is in principle a circular ring surrounding the primary part (160); or

   b) is configured as a hollow cylinder externally enclosing the chamber casing (13); or

   c) is composed of the circular ring and the hollow cylinder; and

   d) has a shoulder part (170) which is provided with an annular seal (171) which, when the buoyancy body (17) is in a risen state, forms, together with a collar (164) extending from the primary part (160), a tight shut-off preventing entry into the aperture (161).
9. Use of the device according to Claims 1 and 2, characterized in that

   a) the aperture (161) present above the second flow passage (162) serves for the passage of air and/or spray water; and

   b) the spray water within the riser pipe (93) flows into a drainage opening (77) which preferably otherwise serves to empty the hydrant (9) after use, with the terminating body (7) closed again.
10. Use of the device according to Claims 1 to 4, characterized in that , during ongoing operation of the mains network (97), with the terminating body (7) in the closed valve position:

    a) in the normal state:

    aa) the flow gap (14) between the casing internal surface (130) of the chamber (10) and the float (15) is filled with water that has passed through the first flow passage (76) of the terminating body (7) from the mains network (97) to such an extent that, on account of its buoyancy, the float (15) closes off, by way of its seal (151), the internal mouth of the third flow passage (168) in the secondary part (165) of the air valve (16); and

    ab) the secondary part (165) is pushed into the primary part (160), closing off the second flow passage (162) thereof; and

    b) in the event of automatic operational venting:

    ba) the flow gap (14) between the casing internal surface (130) and the float (15) is filled with an air volume (12) that has passed through the first flow passage (76) of the terminating body (7) from the mains network (97) to such an extent that the float (15) experiences less buoyancy;

    bb) the seal (151) releases the internal mouth of the third flow passage (168) in the secondary part (165) of the air valve (16), and in the process the secondary part (165) is pushed into the primary part (160) by the prevailing pressure conditions, closing off the second flow passage (162) thereof; and

    bc) the air volume (12) flows into the atmosphere through the third flow passage (168) via an opening (911) in the hydrant (9); wherein

    c) the opening (911) in the hydrant (9) is preferably provided above ground level (E).
11. Use of the device according to Claims 1 to 4, characterized in that, when the mains network (97) is put into operation for the first time or is put into operation again, with the successive filling thereof and with the terminating body (7) in the closed valve position for start-up venting:

    a) initially the float (15) is lowered in the chamber (10) on account of gravity, the secondary part (165) sits on the float (15) and the second flow passage (162) is open, such that the air driven out of the mains network (97) and into the chamber (10) through the first flow passage (76) of the terminating body (7) flows into the atmosphere through the second flow passage (162) via the opening (911) in the hydrant (9); and finally

    b) as a result of the successively rising water level in the chamber (10), with the float (15) rising therein, the residual air volume (12) is made to flow from the chamber (10) into the atmosphere through the air valve (16) via the opening (911) in the hydrant (9), until the secondary part (165) has been pushed by the float (15) into the second flow passage (162) of the primary part (160) and thus closes off the second flow passage (162), and the float seal (151) also closes off the third flow passage (168).
12. Use of the device according to Claims 1 to 4, characterized in that , during ongoing operation of the mains network (97), with the terminating body (7) in the closed valve position, and in the event of automatic venting in the event of damage as a result of a leak or through intended emptying of the mains network (97):

    a) a negative pressure that originates from the mains network (97) and continues through the first flow passage (76) in the terminating body (7) is established in the flow gap (14) with respect to the atmosphere;

    b) the float (15) sinks in the chamber (10);

    c) the secondary part (165) passes out of the primary part (160) on account of the prevailing pressure conditions and releases the second flow passage (162) thereof; and

    d) thus air passes into the mains network (97) from the atmosphere via the opening (911) in the hydrant (9) through the second flow passage (162), the chamber (10) and the first flow passage (76) in the terminating body (7).
13. Use of the device according to Claim 1, characterized in that

    a) the hydrant (9) is installed in the mains water network (97) at a point higher than sea level, the air volume (12) flows in out of the mains water network (97) and collects there; and

    b) the air-guiding assembly (1) is able to be retrofitted on an existing hydrant (9).
14. Use of the device according to Claim 1, characterized in that the air-guiding assembly (1) integrated into the hydrant (9), in addition to automatically discharging into the atmosphere, through the hydrant (9), the built-up air volume (12) that has flowed into the latter from the mains water network (97), is also intended for the automatic inflow of air into the mains water network (97) from the atmosphere through the hydrant (9) in the event of negative pressure occurring in the mains water network (97).

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