DE202006004828U1 - Simple bleed valve with membrane - Google Patents

Abstract

The The present invention relates to a ventilation valve of simple design with Membrane technology, especially for ventilation, is smaller Systems and systems for gas / liquid equalization of pressure / temperature differences of two rooms, in particular valves for heating systems, characterized in that the membrane area spatially and / or is stretched multidimensionally.

Description

The The present invention relates to a ventilation valve of simple design with Membrane technology, especially for ventilation, is smaller Systems and systems for gas / liquid equalization of pressure / temperature differences between two rooms, in particular valves for heating systems. Special designs of the invention are in the dependent claims claimed.

vent valves find everywhere application where media in closed systems and systems, containers Boilers, storage or pipelines are subject to thermals and Pressure equalization must take place. Known applications are compressed air systems, water-bearing systems, Fuel systems and containers, closed systems in traffic engineering. Often, air valves are for liquids as float valves with locking mechanism pronounced.

• – Standhalten der Druckprüfung bis ca. 10 bar
• – Helfen beim Befüll- und Entleerungsvorgang, ca. 3 bar
• – Sicherstellen der Automatikentlüftung, ca. 3 bar.

In the more specific application of the hot-water service and heating system, the ventilation and venting valves take over essentially three functions / operating modes

• - Withstand the pressure test until approx. 10 bar
• - Help with the filling and emptying process, approx. 3 bar
• - Ensure automatic ventilation, approx. 3 bar.

The Membrane technology is still a young technology, but is subject to because almost unlimited applications permanent renewal. The use of membranes takes place in various disciplines of technology, such as medicine / dialysis, beverage industry / filtering and alcohol withdrawal, service water / cleaning and filtration, traffic engineering / cavity ventilation, etc. Membranes are produced as semi-permeable films and their purpose is determined by different product parameters; they hold high Fluid pressures stood, but are permeable for gaseous media. Of the Membrane material is made of plastic, e.g. polytetrafluoroethylene (PTFE) or polypropylene (PP), is oleophobic and / or hydrophobic, Chemically compatible, suitable for sterilization, not wettable at smallest surface tensions.

in the The following is the state of the art related to ventilation valves honored the type described above. According to the prior art, depending on the application, a variety of types of air valves known. Ventilation for hydraulic systems and Fuel tanks were essentially not considered.

In the international Patent Exposé WO 2004/74745 / German Utility Model DE 203 02 828 a known mechanical closed by rotation vent valve is presented, which has in the opening to the radiator of a heating system out a screw-in, provided with an overhead channel lock that allows to raise the water level in the radiator and reduces the possible airspace.

It is the presented vent valve to an improved mechanical arrangement.

International Patent WO 200/20239 / European Script EP 1 119 464 / German patent specification DE 198 45 745 describes a ventilation valve for the interior of a motor vehicle made of a hard plastic frame and a connected via a film hinge softer closure flap.

Of the Pressure equalization is over the above the movie hinge movable flap made.

According to European patent EP 1 227 282 / German patent specification DE 601 06 558 a vertical mounted vent valve with float for heating systems is presented, which has the additional property of the rotation of the horizontally located vent channel. The float acts on the shaft of a closure with a sealing head, wherein the sealing head closes a discharge opening in the air-empty state of the device. A loosened cap allows automatic valve operation.

The older European application EP 961,061 describes the automatic behavior of the valve.

at The registrations are float-controlled mechanical vent valves with the additional Characteristic of the rotatability of the horizontally lying vent.

The European application EP 1 473 495 Italian application 200 30 847 discloses an automatic venting valve with a horizontally mounted float bar and both vertical and horizontal venting for hydro, thermo and / or sanitary systems.

The Mechanical construction is very elaborate and consists of a lot many parts.

The European application letter EP 1 617 114 / German registration DE 10 2004 34 453 provides a mechanical valve for venting a radiator, which can be opened or closed by pressing a button and the Location of the pushbutton indicates the status. When opened, the drain cock is open.

It is not a regulation of the escaping air or water quantity intended.

The European application EP 1 601 914 / German utility model DE 203 3986 describes a mechanical vent valve for radiators, the vent channel by turning or pressing the valve body - even against a restoring force - the opening between the exterior and radiator interior releases. Due to non-permanent opening of the vent channel difficulties in filling the system are expected; to fill the system, the holding body or the valve body is to be solved.

The European application EP 1 125 075 / English registration GB 9 823 614 represents a vent valve for an air brake of the vehicle technology, fluid pressure circuit. A permanently elastic, specially shaped valve member is seated in a valve body and defines a fluid channel from the chamber through the openings, the seat and the vent, and the fluid channel has a flow restrictor area such that increasing pressure in the chamber deforms the platen toward the vent.

The vent valve is designed for Compressor-controlled air pressure systems to prevent oil mist in the brake system arrives.

A similar application - as above - is through the European application EP 1 078 834 / American patent US 379 874 given. An elastically shaped valve element closes the valve seat when pressure is applied; The exit of a line-bound oil / air mixture should be controlled.

Another such application is disclosed in the European application EP 989,328 / American applications US 101 216 and US 321 450 Referenced.

Also the European application EP 867,351 / English registration GB 9706227 has a breather valve for an air brake of traffic engineering to the content.

The European patent EP 1 041 324 / English patent GB 9 907 250 and GB 9 917 914 describes a float-controlled vent valve that works in coexistence with a thermostatic valve in liquid-operated systems. Below a predetermined operating temperature, the valve opens to vent, above a predetermined temperature closes the valve and displaces the float valve.

The automatic ventilation device is very elaborately designed.

The European application EP 1 030 088 / English applications GB 9 903 682 and GB 9 917 436 discloses a valve body with outlet for heating systems, which is closed by a valve screw or can be opened by turning. If the screw is turned all the way out, an O-ring on the foot of the valve screw prevents the escape of heating fluid.

The The invention does not relate to automatic venting.

The European application EP 916 880 / German patent DE 197 46 106 represents a bidirectional valve for ventilation of containers before, the permanently elastic valve body between two screw-on versehe NEN cylindrical bodies - forming the valve - is embedded. The valve is protected from the outside by constructional measures and by the interior of the container through a textile wall - by the pressure compensation - penetrating moisture.

The Valve is for the tank construction designed and designed very expensive.

In the European application EP 840 865 a bleed valve for hydraulic systems is presented, consisting of a, an outlet channel controlling solenoid valve, which in turn is driven by an optical sensor, which is capable of distinguishing between gas and liquid and thus to open or close the outlet channel.

In This disclosure essentially presents the method.

registration EP 378 947 / German writing DE 689 03 939 describes a vent valve for the hydraulic system of a brake circuit of a motor vehicle.

The European application EP 1 205 700 German Application 601 01 835 discloses a float operated vent valve for the level of automotive fuel tanks.

The European application EP 823 577 / American patent US 684,978 / Japanese patent JP 880 19 297 deals with a vent valve consisting of a multi-part housing for the gasoline tank ventilation in traffic engineering.

The patent EP 441 831 / Swedish script SE 880 39 83 has a gas tank vent with float and ball valve to the content.

Also the patent DE 197 07 841 has a bleeder valve for fuel tanks of motor vehicles to the content.

A seal assembly for use with and in combination with a control and vent valve for steam and fuel oil and a valve seat therefor shows the European application EP 750 163 / American registration US 489 524 , The arrangement is used in industrial oil burner technology or large pilot burners.

The European application EP 683 878 / German writing DE 430 37 99 introduces a heavy-duty bleed valve for hydraulic systems with a float-operated float in a valve body and valve disc for opening and closing an outlet port. Such automatic bleed valves are used to remove air from fluid operated equipment or to allow air to escape during system startup.

Vent valves, as they are used for example in heating systems, are mostly for operating pressures up 7 bar designed, which in most cases for use in hydraulic systems is too little.

• – Gas aus einem unter Druck stehenden Flüssigkeitsbehälter oder
• – Flüssigkeit aus einem unter Druck stehenden Gasbehälter entläßt.

With the European patent application EP 515 215 / English registration GB 91 11 327 German application 692 03 156 an automatic vent valve is presented which

• - Gas from a pressurized fluid container or
• - Release liquid from a pressurized gas container.

In a housing with two chambers, from which connects to the container and the other to the outside space has moved, a self-sealing upstream biased Piston, which carries in itself a bore which connects the two chambers together. The container escaping medium presses on the piston, fills the lower chamber and escapes over the connection and the upper chamber to the outside. Connection, spring and Determine outlet opening the closure pressure of the valve.

The European font EP 286,391 / American writings US 150,307 and 34 711 are precursors of the above application and have in principle similarities. The bleed valve has no adjustment options.

The European patent EP 485 688 / German patent DE 403 66 51 discloses a ventilation valve, consisting of valve tappets with seal as a float and a spring-loaded cleaning needle in the vent, which moves depending on the pressure conditions of liquid and gas and frees the opening side walls of dirt.

A Adjustability of the system is not given.

According to the European patent EP 232 713 / the Swiss application CH 60/86, a venting machine for liquid-filled systems is presented, which - can be installed in any position - has a step-shaped spring-mounted piston as a closing member of a vent channel. Accumulated escapes through the vent between the piston and the bore wall in accordance with the viscosity of the fluid. As soon as the liquid column reaches the piston, a pressure builds up due to the accumulation at the gap, which closes the piston tightly by means of an O-ring.

The second embodiment concerns a hand-operated Vent valve.

The Any mounting position is possible only by the additional spring force, the also the closing time affected.

The European application EP 153 999 / German patent application DE 334 66 14 discloses a vent valve, in particular for venting heating systems, preferably radiators. A vent valve having a vent screw closing an inner vent and a chamber having an outer vent opening changeable in particular by rotation is disposed on a valve or plug housing. The valve has no protruding parts.

The vent valve is a hand operated valve.

The German utility model DE 192 40 69 describes a mini-venting machine for hot water systems and heaters. The venting machine consists of a cup pierced to the liquid and filled with hygroscopic swelling disks, the upper edge of which also has small holes to the outside space. The cup is closed with a centrally screwed sealing washer. Air escaping from the system and inflowing water must flow through all fiber discs axially; the fiber discs swell immediately after water wetting.

The swelling fiber discs do not prevent the escape of individual Waterdrop.

An earlier utility model DE 187 10 43 discloses a venting machine for piping and heating systems, in which also sealing washers are used in a designed as a cup with external thread plugs. 6 embodiments are shown, which, however, do not differ in their mode of action.

The later Austrian Applications AT 309 740, AT 309 738 / Swiss application CH 533 270 and AT 295 092 / Swiss application CH 479 012 also on the principle of 'source ring / disc seal', the last four mentioned an additional spring assisted ball valve after closure of the same a replacement of the source disks during operation allowed.

The German utility model DE 20 2005 001 931 describes a ventilation valve - also known as pressure compensation element (DAE) - for gearbox of motor vehicles. The ventilation valve consists essentially of a preßpassend introduced into a housing bore of a sealed housing carrier part made of high performance plastic, introduced in the cylindrical smaller diameter recess centered a circular diaphragm disk and then formed by the cylindrical larger diameter recess of the cover part to a cup-shaped contour. Through appropriate openings in the carrier and cover results in a labyrinthine flow pattern for gas and liquid, with additional liquid deflectors, such as drip edges and annular groove, are provided for the inner and the outer space.

Gearbox of Motor vehicles place high demands on environmental vision; the pressure conditions are more atmospheric Nature.

A package of utility model writings DE 299 18 722 . DE 299 13 728 . DE 299 05 743 . DE 299 03 669 and DE 202 00 986 provides a ventilation valve according to the aerokinetic principle with centric float and a vertically arranged in the upper part valve set, which is primarily placed at high points liquid-conducting lines.

Of the mechanical and metrological Effort of the valve, the arrangement can not appear economical.

The utility model DE 299 00 221 represents a venting device with a venting and drain valve - in particular for radiators - before, which has a screw socket consisting of a housing with an adjustable valve spindle as a vent or drain screw, and is characterized by particularly efficient production.

The vent and drain valve becomes manual operated.

The utility model DE 298 02 955 introduces a special manually operated venting valve for system components in hot water heating systems with venting vents inclined between 10 ° and 80 ° from the vertical. utility Models DE 297 15 018 claims a universally applicable manually operated vent valve for horizontal and vertical use. utility Models DE 200 05 569 introduces a special shape for a manual bleed valve.

utility Models DE 297 09 192 discloses a manual vent valve for a wall heater or the like. with funnel and water catchment.

The German utility model DE 202 18 676 presents a vent valve for radiators or heating systems with an axially adjustable bleed screw with a polygonal head, which has a cap which is removable and shaped so that with her the polygonal head of the bleed screw can be operated.

The German disclosure DE 197 35 812 describes a radiator vent valve for cramped access areas and thus poor handling such that the semi-automatic valve has a ferromagnetic coupling, which causes against a mechanical spring action but with the flow direction caused by a permanent magnet valve opening.

The publication DE 196 13 480 describes a ventilation valve for containers - in particular central heating systems - rooms or arrangements whose internal pressure is above the ambient pressure, with a in the loading and venting direction for the medium to be vented, sealed clamped membrane. The flat circular membrane is clamped in a holding / sealing ring on the valve bottom; above it is an emergency closure device consisting of emergency stopper with lateral O-ring seal, on which acts a retaining spring.

A solution for the test pressure and the filling situation is not given.

In the utility model DE 90 04 375 becomes a manual vent valve for hot water heating - in particular panel radiator - shown with a key-adjustable valve body, wherein the valve body is screwed via a sleeve / adapter in the radiator.

According to the utility model application DE 84 13 483 a venting valve for heating systems is presented, which fulfills the functions of venting during filling / commissioning and during operation in that a float bar has one valve each with a large opening diameter for commissioning and a small diameter for normal operation.

All featured publications are suitable only partially or not at all as a simple air valve with membrane for the intended application.

Of the The present invention is therefore based on the object of and bleeder valve for Gas / liquid balance of pressure / temperature differences between the interior of a plant - in particular a heating system - and a outdoors to create, which is versatile, structurally free formable, production technology as possible is easy to produce and ensures high reliability.

These The object is achieved by a Ventilation valve of the aforementioned type with the given in claim 1 characteristics. advantageous Embodiments show the figures and take the dependent claims.

According to the present Invention is therefore a ventilation valve of simple design proposed with semipermeable membrane, which functions / modes Pressure Check Filling and Emptying and automatic venting Fulfills. The valve consists essentially of a cylindrical arrangement and gets along without moving parts. The membrane element provides that Link between the liquid-filled interior - the heating system - and the outer space is, wherein in the interior due to changing temperatures and / or pressures Can form gases, which adversely affect the operation and operation of the system. Depending on the structure, semi-permeable membranes hold back liquids - or are for this impermeable - and let gaseous Media escape.

The geometric shapes of membranes - even or spatial - can be diverse. The pressure test requires stable mechanical conditions; Therefore, it is proposed that the ventilation valve with a tube membrane equip. This membrane has the design of a hollow cylinder, the for stability sake, in addition with a porous one Coating or filling equips can be. gaseous Medium is thus through the side wall of the tube membrane - if necessary. also by porous Coatings - guided and over the - if necessary. also filled - inner cylinder in the outside space directed.

The achieved with the invention advantages - in addition to the avoidance of Gases of gaseous Media in liquid-containing Containers - in the Simplicity of construction, in the minimum spatial and weight dimensions and in the handling of assembly and installation of the component, including Maintenance.

preferred embodiments of the subject invention are shown in the figures and become closer in the following explains; while further features of the invention are disclosed. Show it

1 Ventilation valve in top, side and perspective view

2 Ventilation valve with tube membrane, disassembled, in side and perspective view

3 Ventilation valve with tube membrane, partially cut, in side and perspective view

4 Ventilation valve with membrane, disassembled, in side and perspective view

5 Ventilation valve with membrane, partially cut, in side and perspective view.

Same and equivalent components of the embodiments are in the Figures always provided with the same reference numerals.

The Description of the device according to the invention will continue on the basis of the explanations the figures.

How out 1 it can be seen, the ventilation valve consists essentially of three parts, the upper part 1 , the middle part 2 and the lower part 3 ,

2 shows the ventilation valve with tube membrane, disassembled, in side and perspective view.

The upper part forms a screw cap provided with openings and external thread 11 , the also creates the connection to the exterior. Recordings 12 allow positioning for a membrane holder.

The middle part is made of perforated disc 21 , Tube membrane 22 and recording ring 23 together; the parts can also be prefabricated as an assembly. The assembly can also be to the lower part with a sealing ring 24 be completed.

The lower part, connecting plug 31 , forms with its external thread the connection to the container, eg a radiator, has an internal thread for receiving the upper part and an inner receptacle for the membrane assembly 2 , The membrane assembly must be sealingly joined in the base and is pressed by means of the screw cap. The lower part is still a carrier of an O-ring 33 for the purpose of sealing to the container. The connecting plug is provided with a hexagon, alternatively, a flattened on two sides cylinder for receiving the wrench or a visually appealing knurling is possible.

Of the Way of escaping gases - in the automatic bleeding mode - from the container is designed as follows: container lower part, inside - receiving ring tube membrane, inside - tube membrane, outside - perforated disc, below - perforated disc, top - screw cap, Breakthroughs.

According to the expected flow rate, the relevant parts are to be dimensioned. The membrane assembly should also be designed so that they predetermined pressure test the plant withstands.

In the filling and emptying operating mode, the connection plug is released from the screw connection of the container, for example the radiator, until the bore visible in the external thread 32 acts as quick-and-ventilation.

In 3 , Ventilation valve with tube membrane, partially cut, in side view, the assembly of the individual parts and assemblies can be clearly. In the perspective view of the seat of the membrane assembly is highlighted. In addition, the course of the flow lines can be identified very well here.

If the pressure conditions allow it, the tube membrane, such as 4 , Ventilation valve with membrane, disassembled, shows, through a membrane disc 25 be replaced. However, this is to be aligned with the local conditions, ie due to the pressure test, the membrane disk is to be realized in a sandwich construction and / or as an assembly. The membrane disc receives supportive support and guide parts 26 , Furthermore, it is also possible to overmold the membrane disc for the purpose of consolidation with another hydrophobic porous layer, such as hydrophobic porous polystyrene.

As shown above, contains the screw cap 11 Recordings 12 for the possible inclusion of guide pins 13 with a spring washer 14 for the membrane sandwich; while it is positioned above the spring ring. In addition to the guidance and positioning of the membrane sandwich, this arrangement brings advantages in replacement inserts of the membrane sandwich during maintenance tasks.

5 shows the ventilation valve with membrane, partially cut, in side and perspective view. These representations make clear the structure and mode of action of the valve. Also, in the perspective the detail membrane sandwich, positioning and guidance of the same, well visible. The course of the flow field can be easily understood.

A further embodiment of the invention provides that the and bleed valve is based on the standard series of such components. The intended Metric standard thread may be used as a replacement / supplemental part for reasons of use also be a non-metric thread.

A further form of expression the inventive novelty is given by the fact that the screw cap to the locking cap, in which the screw thread replaced by locking lugs will - with appropriate Arrangements in the lower part - and the seal over another sealing ring takes place.

According to one Another embodiment of the invention, the semipermeable diaphragm valve has different Porosity / passage numbers on and is for different substances effective.

A further advantageous form The invention is characterized in that the ventilation valve is not subject to any installation instructions regarding its installation.

According to one Another embodiment of the invention, the ventilation valve with membrane cost-effective produced in series; Individual parts or assemblies of the valve are reusable within typing.

A outer sheath and / or an interior filling the tube / membrane with a hydrophobic porous material, e.g. polystyrene, elevated the pressure resistance of the membrane and prevents moisture accumulation.

Advantageous developments of the invention are the subject of the dependent claims.

The numerous possibilities and advantages of the embodiment of the invention are reflected in the number the property rights claims contrary.

1

top Ventilation valve

11

screw cap

12

admission

13

guide pin

14

spring washer

2

Centerbody / diaphragm assembly Ventilation valve

21

perforated disc

22

tube membrane

23

receiving ring

24

seal (not shown)

25

membrane disc

26

supporting and leadership part

3

lower part Ventilation valve

31

connecting stopper

32

drilling

33

O-ring

Claims (16)

The present invention relates to a ventilation valve simple design with membrane technology in particular for the ventilation of small systems and systems for gas / liquid balance of pressure / temperature differences between two rooms, especially valves for heating systems, characterized in that the membrane surface spatially and / or multidimensionally spanned. Ventilation valve according to claim 1, characterized in that the multi-part valve Upper part, middle part and lower part is joined. Ventilation valve according to at least one of the claims 1 and 2, characterized in that the upper part of a with Provided openings across from tightly closing the lower part Cap consists. Ventilation valve according to at least one of the claims 1 to 3, characterized in that the central part substantially from a multi-piece or prefabricated membrane assembly and / or a membrane sandwich exists and one spatially contains trained semipermeable membrane. Ventilation valve according to at least one of the claims 1 to 4, characterized in that the lower part substantially from a in the dissolved Condition acting vent hole containing connection plug consists. Ventilation valve according to at least one of the claims 1 to 5, characterized in that the assembly of the parts the valve mechanically tight and tight. Ventilation valve according to at least one of the claims 1 to 6, characterized in that the membrane assembly / membrane sandwich holding Parts are formed so that the Assembly / sandwich exchange / - is designed changeable. Ventilation valve according to at least one of the claims 1 to 7, characterized in that inner diameter connecting plug, Inner diameter receiving ring or openings support and guide part, Inner diameter and height membrane, holes volume Perforated disk and breakthroughs Cap forming the gas line and their passage volume in dependence determine pressure and temperature. Ventilation valve according to at least one of the claims 1 to 8, characterized in that the execution of the thread is not mandatory must be metric. Ventilation valve according to at least one of the claims 1 to 9, characterized in that the semipermeable membranes different porosity / passage numbers identify and for different substances are effective. Ventilation valve according to at least one of the claims 1 to 10, characterized in that the shape of the valve can also be cylindrical and installation / installation according to no installation instructions subject. Ventilation valve according to at least one of the claims 1 to 11, characterized in that the valve is inexpensive in Series can be manufactured and items or assemblies of the valve are reusable within the variety of types. Ventilation valve according to at least one of the claims 1 to 12, characterized in that the membrane assembly and / or Membrane sandwich a the valve body adapted spatial and / or multi-dimensional Has shape. Ventilation valve according to at least one of the claims 1 to 13, characterized in that the forming the membrane body surfaces more porous Have layers. Ventilation valve after at least one of claims 1 to 14, characterized in that the membrane body is filled with full volume porous. Ventilation valve according to at least one of the claims 1 to 15, characterized in that the screw cap with facilities equipped for receiving membrane assembly and / or membrane sandwich is.