DE3208998A1 - Device for bleeding line systems - Google Patents

Abstract

Devices for bleeding and/or venting, especially absorption venting, of line systems having a fluid circuit, preferably a water circuit, which consist of a housing with a valve arranged at the upper end, which valve is operated by a float via a valve needle and a float needle, are designed to be universally applicable, that is to say can be made such that they can be used for water circuits other than those which are only closed, an uninterrupted and perfect operation of the valve being guaranteed irrespective of the presence of dirt which cannot be completely avoided in any case, in that the float is arranged on the float needle such that it can move freely over a height which permits the desired pressure increase, an adequate safety distance always being maintained between the water surface and the valve; the housing is constructed in a number of pieces in order further to improve the permanent reliability of operation, the housing preferably being assembled from a supporting part and a head part so that each head part is placed on one of the two basically possible supporting parts in accordance with the modular principle, namely, on the one hand, onto a supporting part which is suitable for a large bleeding device and a pressure monitor, also known as a "spirotop", and on the other hand onto such a supporting part which contains a gas separating device, preferably in the form of a wire cage, as a result of which a variant which is designated as a "spirovent" is created, by means of which gas, especially air itself, can be separated in the form of small bubbles, which are too small to be detected with the human eye, including so-called micro-bubbles.

Description

The invention relates to a device for venting and /

or degassing, in particular absorption degassing of pipe systems with a liquid circuit, preferably a water circuit, with a housing on which A valve with a valve needle protruding into the housing is arranged on the upper end is on which a float is suspended vertically movable with a float needle.

Such devices are used on the one hand in closed circulation systems in addition, when filling and emptying the system as well as in case of thermally induced volume changes the circulating water provides the necessary exchange of air between inside and outside on the other hand, should be allowed in both closed and open systems also the collection and elimination of those left behind in the system or in the company caused by released air and other gases produced during operation, which are carried along by the circulating water in the form of larger and smaller bubbles will or will be.

A device known from DE-PS 22 00 904 has a squat Housing, the height of which deviates only insignificantly from its diameter. The case has at its lower end a connection piece for the pipe system and is filled with circulating water to a little over half the height, while in the remaining upper part of the housing is air. Immediately under the housing cover a valve is arranged in the side wall of the housing, from which a valve needle to about 'protrudes to the vertical center axis of the housing. In the circulating water a swimmer swims with a vertical float needle attached to the The valve needle is suspended and therefore falling below a certain level Water level the valve opens.

The distance between the water surface and the valve is comparative small amount, so that a significant rise in the water level must not be permitted, otherwise contaminants floating on the water will get into the valve can, whereby the valve leaks and would consequently useless. That means, that this known, otherwise satisfactory working device only in such Line systems can be used in which the pressure fluctuations are comparatively are low. The height of the air bubble in the housing and the distance of the valve from the water surface are such that the air bubble is only halfway their original volume can decrease in order not to run the risk of it too contamination of the valve occurs. This means in applications with contaminants for the permissible pressure fluctuations, that they only reflect the mean pressure may exceed by less than 1 bar.

A valve known from DE-GM 71 36 706 has a screw-in body, which is connected to a float shaft via a pretensioned spring. Here carries the Einsohraub body the valve seat and the float axis one of the valve seat oppositely arranged sealing plate. At the end of the float axis is an eccentric one Float rotatably mounted on the float axis. The eccentric float turns when the water level rises first around the float axis and becomes at further rise in the water level, causing the valve to close will.

If the pressure increases further, the water level rises with it located dirt up over the valve seal, whereby this with the dirt comes into contact and leaks.

In a known from DE-GM 71 45 993 ventilator is in one Container a float stored decentrally. There is an air outlet opening in the lid of this container intended, which at the same time the valve seat and the suspension point for a tension spring represents when the water level is just below the sealing plate of the valve has risen, the float closes the valve. at a further increase in pressure, the water level also rises further, so that the Dirt floating on the surface of the water constantly with the sealing plate of the valve comes into contact and thus the valve leaks, i.e. becomes unusable.

As is the case with many technical subjects, this also applies to the present Devices that, given the technical possibilities today, there are none at all The problem of building an accurate, complex instrument, and also with a theoretically long-term permanent effect, but here too, Likewise, in most other technical areas, the risk of contamination and thus the functional impairment is a problem that has not yet been solved it can be assumed that dirt is present everywhere and also by the most expensive Measures can hardly be created absolutely dirt-free areas. For devices of the type mentioned at the beginning, this means a very special difficulty, than the demand is made on the blow-off valve that it is always on standby must be to ensure permanent and uninterrupted venting; a venting device of the type mentioned at the beginning should therefore never have a switch-off option, i.e. be in constant readiness to function.

The invention is therefore based on the object of providing a device of to be trained in this way and at the same time universally applicable to design, i.e.

can also be used for other than just closed watercourses make that an uninterrupted and seamless function of the valve is indispensable the presence of dirt that is not entirely avoidable for one Duration This is guaranteed, if at all, by the already high-quality and therefore long-lasting There are limits to the material of the valve itself; especially should also be at comparatively considerable pressure increases in the pipe system must be ensured, that the valve does not come into contact with dirt floating on the surface of the water comes, but is still easy to assemble and maintain. The inventive Solution is based on the basic idea that an unintentional opening of the valve both from the outside as well as from the inside, causing a rise in the liquid level up to the Valve and thus contact between the valve and the layer of dirt floating on it would certainly be made impossible, both in the Course of normal operation as well as with regard to unqualified operator interventions.

The surprisingly simple and in terms of its field of application diverse solution, as shown below, and the various Implementation options emerge from the subclaims, is initially thereby achieves that the float is arranged freely movable in height on the float needle is and the float needle and possibly. The housing are long enough that at a pressure increase - up to a desired value - still a sufficient safety margin remains between the water surface and the valve. Proceeding from this suggests the invention further measures, which are disclosed in detail below, with advantageous measures Effects that make the device according to the invention universally applicable, so that it by simple modifications to the respective conditions, be they by pressure and temperature conditions or also determined by the respective liquid, optimal can be customized.

The solution given above leads to a device where the air bubble is inside the air chamber above the water level is so great that it is reduced to a fraction of its original value by fluctuations in pressure Volume, for closed water circuits up to 1/5 of their original Volume can be compressed without the risk of being on the water floating impurities or the like. Solids come into contact with the valve could. This means at the same time that pressure fluctuations in the line system do not impair the functionality of the device designed according to the invention This is because the float is far away, i.e. far below the valve.

This ensures that no contamination reaches the valve can, so that a corresponding, high J, life of the valve and thus the entire In accordance with the invention designed device is to be expected, essence for this Advantageous properties achieved in a surprisingly simple manner by the invention is the height mobility of the swimmer with sufficient length of the float needle on this. The free mobility of the swimmer on the float needle is also for the constant fluctuations in the water level during operation changing temperatures and other influences are important.

In a further embodiment of the invention it is provided that the valve needle and the float needles are connected to one another via eyelets at their ends. Here it is recommended that the eyelet of the valve needle runs in a horizontal plane and has the smallest possible diameter, while the eyelet at the upper end of the float needle should be elongated.

Due to the small diameter of the eyelet of the valve needle, there is essentially a constant lever arm for attacking the float force ensured. If the The float should stick to the float needle, which is because of the constant Move of the swimmer along the float needle is very unlikely, the Upper elongated eyelet of the float needle from below against the housing cover without opening exert a force on the valve needle, sometimes even without touching the valve needle.

However, other eyelet designs can also be provided. So is within the scope of the invention the possibility that the at the top of the float needle provided eyelet is designed to be open in the shape of a hook; in this case it is advisable to the upper housing wall with a centric, directed towards the float needle To provide a recess, which then serves as a stop for the needle, # e.g. in before mentioned, extremely unlikely event of the swimmer sticking to the Float needle. With this design, the assembly is considerably simplified because the two needles only by rotating them accordingly around their longitudinal axis in the The desired intervention can be brought about without impairing the long-term function.

Another simplification of the assignment of valve needle to float needle in the installed state is created in that a closed or open Eyelet at the upper end of the float needle with an extension provided above the nozzle is equipped, which is longitudinally movable in a guide in the upper housing wall, but is kept limited in its upward movement, and that the valve needle stretched in a straight line, i.e. without any hook or loop-shaped bends is designed and extends through the swimmer's needle eye when installed the float needle eyelet as used in preferred exemplary embodiments come, are specified in claims 8 and 9.

The float needle is advantageously closed at its lower end angled to a stop through which the lowest possible location of the float is set opposite the valve needle.

The lower stop for The bend provided for the float on the needle is acute-angled in a preferred embodiment and designed to be resilient and thus self-locking, so that the float can be installed only needs to be guided from below over the needle tip angled in this way; after passing the bend, it spreads back to the acute angle, so that thus a self-locking stop design that can be easily dismantled again if necessary is.

The housing is expediently provided with a lower and an upper one Provided a stop for the float, with an overload due to the lower stop the spring of the valve is avoided and ensured due to the upper stop is that the swimmer cannot exceed a certain height and consequently certainly cannot hit the valve.

The last-mentioned effect can also be achieved by an upper stop for the swimmer on the float needle itself - preferably in the form of a bulge or cranking of the needle - in its upper area - preferably below it Eyelet - can be reached, in which case the swimmer is in contact with it Stop when the liquid level rises further, ultimately related to the previous one with the extremely unlikely sticking of the float needle eyelet mentioned above occurs at the upper housing cover, i.e. even then the valve does not open unintentionally will.

In a further embodiment of the invention it is provided that the closing force of the valve can be adjusted continuously by turning a closing element on a spring is so that the closing force of the current conditions can be optimally adapted. In addition, the size of the sealing surface by the adjusted bias of the spring is also adjustable, so that when heavily biased Spring a large sealing surface is achieved, while the sealing surface with less strongly preloaded spring is correspondingly smaller.

When the water level falls below the normal level, at which the Valve is relieved, there is no sudden opening of the valve, but when tilting the closing body with the sealing support opposite the valve body initially only to a reduction of the sealing surface width on one side and to a corresponding enlargement of the sealing surface width on the other side up to to take off completely on one side, eliminating the initial micro-venting goes into normal ventilation. Micro-venting is a type of air creeping through the gap or the boundary layer between the valve body and the counterpart, so the seal pad.

Advantageously, through the valve body from the inside to the outside a labyrinth, preferably a right-angled hole (corner hole) intended. This ensures that the valve cannot be tampered with improperly from the outside, for example by means of a needle or the like.

can be opened or damaged.

It is also advisable to dimension the float so that that a desired large or, depending on the application, also small, free water surface remains between the float and the inner wall of the housing, so that on the one hand it does not to a blocking or even sticking of the float with the opposite one Housing wall can come as a result of dirt deposits and on the other hand ascending Bubbles do not have an explosive effect.

Both in terms of simplified assembly options as well as further It is also proposed to improve the long-term reliability of the function, to design the housing in several parts, the housing preferably consisting of a support part and a head part is composed, which is gas-tight and liquid-tight Screw connection are connected to each other.

This division of the housing opens up an even more comprehensive one Scope of application, namely by the support part as a connecting part either only one circuit connection preferably provided vertically-coaxially in the base of the support part or connection piece or at least two as a connection part and separator Has circuit connections and contains a gas separation device.

In both cases, the head section, acting as a vent, carries the valve and takes the float with the float needle. In the former case, the device preferably arrives used as a large ventilator and pressure monitor (from the applicant as "Spirotop" referred to), while the second-mentioned embodiment as an absorption degasser of. by the applicant is referred to as "Spirovent", which special expressions also used below for the sake of simplicity and defined as follows are: The ~ Spirotop "to be installed at the highest point of the system is guaranteed especially when the pressure level is higher than that of the atmosphere The cycle at the highest point in the system is uninterrupted and controlled Maintain minimal overpressure. For example, if there is a lack of water in the circulation system, this lowers the water level and opens the drain valve via the float.

The resulting pressure drop in the entire system then causes over a pressure switch to switch off, for example, the firing device of a Heating system.

The "Spirotop" is an excellent addition to the installation of a "Spirovent", which, as previously mentioned, has a gas separation device in its support part contains. This preferably consists of a wire cage, which is in the form of the so-called Spirotube has proven particularly effective. A "spiral tube" is spiral around the core tube a wire entanglement attached; this wire cage has important things in a very special way To take over functions. The wire entanglement around the core tube is designed so that it is hardly calculable and detectable as resistance for the water, but on the other hand in the main axis of the Spirovent running perpendicular to the direction of flow Zone of absolute calming of the liquid creates, so that there even the smallest, with Blisters that are no longer visible to the eye, including so-called microbubbles can rise to then in a suitable manner in the headboard and from there to get outside via the valve. It is in this regard regarding the general function also referred to the aforementioned DE-PS 22 00 904, this reference is exclusively to the principle of the bubble or bubble separator relates, while within the scope of the present invention not only a broader application base on different liquids and cycles is revealed for the first time, but also constructive goat to optimally use this effect in the context of the modern Equipment that meets the requirements with at least the negative effects of dirt unlimited service life and functionality are shown.

In this sense, the invention further proposes "Spirovent" and "Spirotop" to adapt its individual parts in such a way that both only differ by the connection part, while the head part is designed identically for both is and is only manufactured and / or kept in stock according to the corresponding sizes must become.

A particularly advantageous measure for this is the arrangement of a Separating and closing cap between the support and head part, this cap in further Design sealingly and non-detachably connected to the head part, preferably glued is and at least one connection or liquid and / or gas passage opening owns.

This design increases the safety in terms of the permanent effect of the device according to the invention is further increased, as it is a head that can be unscrewed is provided with a glued-in cover directed towards the supporting part, which quasi to an encapsulation with only liquid and gas, preferably air, inlets leads. This becomes the headboard for both Spirovent and the ~ Spirotop " Identically designed, with simultaneous almost encapsulated protection for the sensitive and a highly sensitive ventilation system located in the head part As already indicated, the headboard can be used as a modular component for both Spirotop as well as Spirovent can be used. In this context is still pointed out that it is also provided in accordance with the invention the respective conditions, be they due to a special type of pollution or also due to the medium in the circuit, the dimensions of the head part, in particular to be able to choose its length differently, so that it is also at the same time the degree of security against internal pollution through the appropriate choice of liquid-free volume in the headboard can be adjusted to the desired level of moisture can.

To further increase the inaccessibility in the sense of undesirable Interventions such as are to be avoided with the aforementioned encapsulation are implemented according to the invention proposed to provide the cap with a central recess that is built in State down into the support part and there, if necessary, into the support tube of the "Spirotube" protrudes and designed as a guide for the lower end of the float needle is. On the one hand, this provides a guide that prevents the swimmer from swinging achieves a straight line in interaction with the upper needle suspension Guaranteed float movement, eliminating the upper housing stop for the float becomes superfluous; on the other hand, it is avoided that the float needle is unwanted from the outside can be touched or undesired interventions can be carried out on it.

Since between the head part and the support part there is always a gas or air and fluid exchange must take place, there are through-openings around the recess provided, the recess itself being either closed or open at the bottom can.

The cap itself is ideal in various configurations to create dirt collecting spaces already in the supporting part, so that impurities do not get into the headboard at all or at most to an extremely small extent. The individual design options proposed for this purpose with the invention for the cap go from the following description and various subclaims in detail. The encapsulation of the head part is therefore also the The possibility is given of the liquid and gas tightness at certain time intervals To solve the rotary connection between the head and connection part and in the support or connection part to remove collected dirt without opening the headboard and thus the highly sensitive Valve is impaired in its reliable mode of operation.

The parts belonging to the valve mechanism are made of corrosion-resistant and temperature-resistant material.

The invention is illustrated below with reference to several in the drawing depicted Embodiments explained in more detail.

1 shows an embodiment of a device according to the invention as "Spirotop", in cross section; 2 shows an embodiment of the "spirotope" according to the invention According to FIG. 1 with an encapsulated head part, in cross section FIG. 3 a further exemplary embodiment of the invention, namely as "Spirovent", with the head part with cap in the same Way is carried out like that of FIG. 2; 4 shows a further variant of the head part as well as the cap, again in cross section; FIG. 5a shows a somewhat different version compared to FIG Embodiment of both the head part and the cap using the example of a "Spirovents'f, in cross section; 5b shows the cap according to FIG. 5a to illustrate the shape and FIG Distribution of the passage openings, in plan view; 6a shows a preferred embodiment of a "Spirovent", the cap of which is formed essentially according to FIG. 4, however provided with a flat cap and a float covered with sealing rings from below is, in cross section; 6b shows a representation according to FIG. 5b with differently shaped Through openings; Fig. 6c the upper end of the float needle, as it is in the The embodiment according to FIG. 4 or 6a could be used; and FIG. 6d shows a variant the float needle encompassing the valve needle, in contrast to the version according to Fig. 6c in a closed, loop-like design.

The device shown in Fig. 1 in the design as "Spirotop" is used to vent line systems that are not specifically illustrated with a closed water cycle, such as in the case of central heating in a building are present. An essential component is a vertically elongated housing 1, which consists of a cup-shaped bottom part 2 with a connecting piece 3 for connecting the Bottom part 2 consists of a line system not shown in detail in the drawing.

With the interposition of a seal 4, one is essentially cylindrical The designed head part 5 is screwed onto an internal thread 6 of the base part 2. At the upper end of the head part 5, this opens into a perpendicular to the housing longitudinal axis directed nozzle 7 for receiving a valve body 8. At the inner end of the valve body 8, this is tapered (9) and has an external thread 10 here.

Opposite the valve body 8 and coaxial therewith is a closing body 11 with a sealing pad 12, preferably made of Viton, arranged. The closing body 11 also has an external thread 13 which is connected to the external thread 10 of the valve body 8 shows a continuous thread.

A coil spring 14 is on the external thread 13 of the closing body 11 and screwed onto the external thread 10 of the valve body 8. By more or The spring 14 is screwed less tightly onto the two external threads 10 and 13 a corresponding preload of the spring 14 achieved what a corresponding closing pressure between the taper 9 of the valve body 8 and the sealing pad 12 results.

From the closing body 11, a valve needle 15 protrudes approximately up to the center of an air chamber 16 delimited by the head part 5 At the end of the valve needle 15 has an eyelet 17 which (contrary to the drawing) lies in a horizontal plane and has the smallest possible diameter. A float needle 18 with an elongated upper eyelet 19 is suspended in the eyelet 17 At the lower end of the float needle 18 is a lower stop 20 for a on the float needle 18 freely movable float 21 angled. The swimmer 21 is provided with a central bore 22 which is so large in diameter is that the float 21 is in height according to the present Level of the water surface between a lower stop 23 in the bottom part 2 and an upper stop 24 in the head part 5 can move freely. The swimmer 21 has from the head part 5 and from the bottom part 2 such a large distance that it is not for blocking or gluing the float 21 to the adjacent walls as a result can come from floating on the water surface 25 or 26 impurities.

The task of the upper stop can in a preferred embodiment by a stop 24a in the form of a lateral bulge or crank of the Float needle 18 are met.

In the valve body a right-angled bent hole 27 is provided, so that the valve 8, 11, 12 not from the outside with a needle or the like. open and / or can be damaged.

When arranging the device on a riser a Central heating system becomes the float when the heating system is being filled for the first time 21 are in its lower position, that is, on the lower stop 23 of the bottom part 2 rest. Here, the valve 8, 11, 12 via the float needle 18 and the Valve needle 15 open. While the pipe system is being flooded, the air chamber 16 vented through the valve 8, 11, 12. This venting process stops at the moment on, in which the water level in the housing 1, the float 21 in the with drawn out Has raised the lower position shown in the lines, i.e. the water level 25 is reached. In this position the valve closes. The pressure in room 16 is at this point in time equal to the ambient pressure; from now on there can be overpressure in the system being constructed. Only when there is an overpressure of e.g. 6 bar in the housing 16 the float 21 is in the illustrated embodiment in the with interrupted Upper position shown in the lines, i.e. the water level 26 has been reached.

With each subsequent air entry into the air chamber 16, the water level is 25 is lowered regardless of the then prevailing pressure, with which the float 21 sinks and via the float needle 18 and the valve needle 15, the valve 8, 11, 12 is then opened when the level is not reached.

The valve is then opened so long, i.e. it is vented as long as until the float returns to the lower position shown in solid lines has been raised.

When the valve 8, 11, 12 is closed, a sufficient Overpressure can be built up in the air space 16. During this process the air becomes compressed in the chamber 16, whereby the water surface 25 or 26 and the float 21 can be moved freely upwards along the float needle 18 accordingly.

The dimensions of the air chamber 16 are designed so that one layer of dirt floating on the water surface 25 or 26 in the event of a pressure change up to 5 bar at a safe distance from the valve 8, 11, 12. At a The pressure increase by 5 bar that is located in the head part 5 is correspondingly reduced Air bubble to 1/5 of its original volume, making the water level 25 to rises to the level 26 and thereby takes the float 21 with it. This got through the water level 25, which is an original distance H from the upper stop 24, to this up to a distance of 1/5 H.

The device also acts as a safeguard against a lack of water.

If something is not shown in detail in the drawing due to water loss The expansion tank of a central heating system has been emptied and no make-up More can be done from the expansion tank into the pipe system as the pressure progresses Water loss of the water level 25 in the housing 1 will drop. Thereby the valve 8, 11, 12 open, whereby the overpressure that existed in the housing 1 up to that point is reduced by, for example, 0.5 bar. This falls in the entire pipe system the pressure is also reduced by 0.5 bar, whereby a in the drawing not illustrated pressure switch reacts and either the burner on the boiler is switched off and / or fresh water is added at the same time initiates.

Because the device switches off before the line system turns on If lack of circulating water occurs, the required overpressure is throughout System ensures that air can be sucked in from the outside with certainty is excluded in systems with this device because of the safe Removal of air or other gases, corrosion and / or cavitation erosion no longer open.

These beneficial properties and behaviors can be then use it with particular advantage when the device according to the invention is used as a spirotope on a "dead Strang1, pipe section" connected to the circulation system with or for Water supply - if possible installed several meters above the circulation system. At the moment the shutdown as a result of water loss, which is also in the breather housing noticeable, the pressure drop can, among other things, cause a warning signal to be emitted, E.g. used to light up a signal lamp in the room thermostat, with which the impending water shortage is signaled. The reserve water supply in the "dead The line between the deaerator and the circulating water acts as a buffer sufficient time to refill while safely avoiding the ingress of air into the plant.

In the following description of the further exemplary embodiments are for the same, in their training essentially with that described above Embodiment corresponding parts used the same reference numerals.

In Fig. 2, a "Spirotop version" of the invention is also shown. This consists of the head part 30 with a built-in valve at the top, which is in this and the following exemplary embodiments will not be described in more detail, since there are both with regard to its position and its structure with the embodiment according to FIG. 1 coincides, and the support part 31, which like the bottom part 2 according to FIG. 1 is cup-shaped is formed, is connected via a thread to the head part 30 and in his The bottom is provided with the centric, vertical connection piece 3.

Between the head part 30 and the support part 31 there is a cap 32, as the encapsulation of the head part 30 to protect the highly sensitive valve and the float suspension is used. The cap 32 is firmly connected to the head part, preferably glued to the lower edge of the head part 30 with this. In the illustrated embodiment the cap is curved downwards and has a central recess 33 which is formed open at the bottom so that the float needle 18 in lowered Position with its lower part can penetrate into the recess; in normal position the needle 18 is also prevented by the recess from swinging to the side, The Recess 33 thus represents a certain lower guide for the float needle. The recess 33 is open downwards for fluid exchange at 34 and also of several through openings in the form of simple bores 35 in the cap 32 surround.

With the domed shape of the cap 32, there are two desired effects achieved. On the one hand, the float 21 reaches its lower, valve-opening, dashed line location on a circle 36 in punctiform contact with the in the cross section running perpendicular to the plane of the drawing circular cap 32, whereby a very easy lift-off of the swimmer due to the rising liquid level minimum liability is guaranteed; on the other hand, there is an annular dirt space 37 in the arcuate area of the cap between this and the opposite one Wall part of the support part 31 is formed; in this dirt space 37 can be on the liquid floating dirt. with this through the connection piece 3 in the support part 31 should reach, collect without penetrating into the head part 30 through the circular Orifices 35 distributed around the recess 33 can separate out air climb up into the headboard. The openings 35 cause larger air bubbles, which get into the support part 31, in contrast to the embodiment according to FIG. 1, divided before they get into the float and valve area through this the bubbles lose their relatively large buoyancy, which leads to a real water explosion can lead, which also prevents entrained dirt particles from exploding be thrown into the valve area.

Large bubbles or those causing such a "water explosion" The amount of air can only pass the bores 35 relatively slowly and must also then flow around the float 21, so that the dangerous centrifugal effect described is lost to the top.

In the aforementioned lower position of the swimmer, shown in dashed lines 21, the valve is open and the interior of the head part differs from that of the support part the support of the float 21 on the cap 32 is separated. As soon as the system pressure increases again, an overpressure arises in the support part 31, while the interior of the head part connected to the atmosphere. The pressure difference drives the swimmer out of his lower position upwards, the stop 24a in the event of a sudden Increasing the pressure prevents the float from contacting the valve body comes, i.e. the float at the stop 24a even in the event of a spin motion is intercepted upwards. Since the float needle 18 with its lower end in the Well 33 is held against sideways evasion, the swimmer needs 21, in contrast to the embodiment according to FIG. 1, no upper housing stop.

Contrary to all expectations, the swimmer 21 should with the float needle 18 stick together, so if the pressure rises and the liquid level rises the needle 18 with the float 21 is raised, but limited, since according to the invention the ceiling of the head part, i.e. the upper housing wall, is centered on the float needle 18 has to directed depression 38, which acts as a needle stop, so that at this movement of the float needle, the valve needle 15 remains unaffected at the top The end is The float needle is provided with an open eyelet 39, which engages in the valve needle eyelet 17, here in its horizontal installation position is shown. The open eyelet 39 leads to a simple and quick assembly the float needle; the assembly and disassembly of the float is also done very simple and quick, since according to the invention the lower end 41 of the Schwinmernadel 18 is bent back at an acute angle, so that the float 21 only from below needs to be pushed over the end 41, which then spreads again a little, so that a securing support for swimming 21 is then given. This lower one As already mentioned, the end 41 of the float needle 18 dips in to a small extent De indentation so that the swimmer has zero vertical movements under all circumstances performs on a central axis and except for the cap 32 never other parts of the Device touches.

The foregoing shows that opening the valve during operation can only take place when the float is below the position shown decreases, maximum is to the lower dashed representation, i.e. up to the touch with the cap 32 If the valve needle is pulled too far downwards, for example if the float and the float needle sink by too great a distance, see above the spring 14 of the valve may be overstretched, resulting in changed closing properties could lead. In this respect, too, the cap 32 according to the invention offers considerable Advantages, since the recess 33 is not only used as a lower guide for the float needle 18 serves, but also excludes any effect on the valve needle insofar as as the lowest position in which the float needle 18 can get through the The lowest position of the float is defined, which is countered by the cap 32 being supported The restoring force of the needle 15 ensures that rest on the cap 32 Swimmer 21 the Float needle 18 does not move downwards out of the recess 33 can sink beyond the opening 34 also. In this position, therefore, remains lower end 41 of the float needle 18 still within the recess 33, so that also with the head part removed, the needle 18 cannot be pulled from the outside, i. e. the maximum deflection path for the valve needle 15 is determined by the path that the float 21 can move back until it rests on the cap 32.

The embodiment according to FIG. 3 differs from the one just now described according to FIG. 2 only in the configuration of the support part, which is here - in the case of the "Spirovent" - no longer cup-shaped but longer and essentially is designed cylindrical. In the case of the Sirovent version, the support part 42 has in the bottom area two opposite connecting pieces, which are arranged horizontally coaxially in the installed state 43, the aligned position is provided to the "Spirovent" in a continuous To use the line. The so-called "Spirotube" is located in the supporting part has already been explained with regard to its structure and essentially from the Core tube 44 and the wire netting 45 wound thereon, which is the calming the water path in this area and the rise of microbubbles themselves guaranteed in the upper region of the support part 42 without the connecting piece 43 passing medium of the circuit to oppose noteworthy flow resistance.

From the upper part of the support part 42, the separated air or other gases to be removed via the through openings or bores 35 into the Head part 30. The length of the "Spirotube" is such that the recess 33 in the core tube 44 protrudes; the bores 35 open outside of the core tube 44 in the interior of the support 42.

In Fig. 4, the head part 30 is on an only incompletely drawn Support part shown, which can be designed either according to FIG. 2 or according to FIG. 3 could. The head part 30 differs in this respect from that according to FIGS. 2 and 3, as in this case, instead of the recess 38, a guide bore 46 for the in their The upper part is provided with a slightly differently designed float needle. This owns namely above their eyelet 47, which can be designed to be closed or open, for which purpose Possible embodiments in connection with FIGS. 6c and 6d are also specified, a straight extension 48 which is longitudinally movable in the guide bore 46 to can slide to the upper stop. In this case, the valve needle 15 is straight designed without end bend or eyelet. This brings a further simplification of assembly, without impairing the reliability and functionality of the valve, there the mutual engagement between float needle 18 and valve needle 15 continues as is given in the desired precise manner.

Another difference to the previously described exemplary embodiments consists in the design of the cap attached to the head part. This cap - at this embodiment is numbered with "49" - is designed here in such a way that that the connection openings surrounding the recess 33 as a deep-drawn collar 51 are designed, which surrounds an annular passage opening 52.

This design of the cap results in a quasi permanent one Air space 53, in which dirt can collect and down through the lower Edge of the collar 51 is limited. This air space 53 can be due to the respective cap shape can be enlarged as desired #. It turned out that after a boundary layer 54 between grease, dirt and water forms after some operating time, which can hardly be penetrated by small air bubbles. As a result of this phenomenon collect below air bubbles at the boundary layer, namely in the same plane in which the collar 51 of the passage opening 52 also ends which they, namely the air bubbles, can then rise into the head part 30. In addition to increasing the dirt collecting space and thus the effect of removing dirt from To restrain penetration into the head part 30, this embodiment of the cap 49 has an additional positive effect for a calm ascent of the air bubbles.

In Fig. 5a, a further "Spirovent" version is shown, whose The head part according to FIGS. 2 and 3 is formed; the cap 49 is essentially shaped according to FIG. 4, but with the difference that here the connection openings of several circular ones evenly distributed on a concentric circle There are passage openings 55, each by correspondingly deep-drawn deformation the cap 49 are surrounded by a collar 56, which compared to the collar 51 after 4 is somewhat lower, with the result that the boundary layer 54, on which the bubbles 57 find themselves and migrate to the passage openings 55, a little higher is located, so the air space provided for the dirt is somewhat smaller.

The arrangement of the passage openings 52 in relation to the opening 34 of the recess 33 can be seen from FIG. 5b.

In Fig. 6a a further "Spirovent" version is shown at the support part 42 in addition to "spiral tube" 44, 45 essentially as in the execution is designed according to FIGS. 3 and 5a. The head part has in the example shown the design also shown in FIG. 4, the valve needle 15 also here being straight is designed to run and through a closed or open loop of the valve needle 18 protrudes.

There are two ways of designing the eyelet for the float needle 18 shown in Figs. 6c and 6d. The open training of the eyelet 47a goes from Side view according to FIG. 6c, while the side view according to FIG. 6d a shows closed execution of the eyelet 47b. This is easy to produce by that the end of the float needle 18 in the manner of a single turn while observing the desired loop diameter around 3600 perpendicular to the needle axis but in one of these containing plane is bent. The then remaining free end is, as well indicated in FIGS. 6c and 6d, as guided in the upper part of the head part cover designed free end. Both Usen versions allow the upper float needle stop to be omitted 24a, which they form themselves with a suitable choice of diameter, so that the float 21 rests in its uppermost position on the lower edge of the eyelet and thus still below the valve body comes to a stop, so that no mechanical stress the float 21 takes place on the valve or its body.

In this embodiment, the cap 58 is not like the previous ones Examples curved down into the support part, but designed flat with the special purpose of creating a check valve. On the one hand, there is deepening 33 closed at the bottom, so that they only hold and guide the lower Float needle tip takes over; on the other hand, the float 21 is with one side appropriately sized sealing rings 59 occupied, which ensure that the float in its position resting on the cap 58, the support part space from the head part space hermetically separates.

This embodiment is particularly suitable for circuits with unsaturated, absorbent liquid because the free water surface is minimal is to be kept so by the gas or air absorption process in the device self the air to be kept above the level of the liquid carrying the float 21 or gas space does not disappear. Regardless of the pressure and thus the respective location of the float is by correspondingly small dimensioning of the gap 61 between The float and wall of the head part kept air absorption to a minimum; at the same time, when used as a water shortage safety device (Spirotop "), the opening reaction the valve faster and more precisely the lower the volume of water around the float 21 is.

As can be seen from FIG. 6b, the passage openings are here in Shape of two opposite, essentially semicircular or sickle-shaped Recesses or deep-drawn through bores 62 designed, the concentric are arranged around the recess 33; on their arrangement and mutual assignment the shape and position of the sealing rings is coordinated.

As already mentioned, each headboard according to the invention is for both to use a Spirovent as well as a Spirotop. In the one shown in Fig. 6a -Head part with the special design of the cap 58 in the form of a closed Recess 33, float 21 and cap 58 work together as a check valve, than in the lower position the cap hermetically closes the two spaces against each other closes so that no air from the head part if there is a pressure drop and the valve is open or ambient atmosphere # can get into the circuit, thus becoming more unwanted Prevented ventilation. The check valve effect is when the recess 33 is open not given, because then over the central hole in the float 21, which because of the The need for the float 21 to move freely on the needle 18 is greater is dimensioned as the diameter of the needle 18, gas from the head part into the support part - whether it is now designed cup-shaped for the "Spirotop" according to FIG. 2, or be it with "Spirotube" provided for the "Spirovent" - can get inside.

The description of the preferred exemplary embodiments particularly clearly shows the advantageous manner in which the various individual parts of the device can be combined and designed with one another, depending on which circuit parameters and fluid properties are involved. In particular, each head part is to be screwed either as an absorption degasser onto a support part, for example according to FIG. 6a ("Spirovent") or onto a support part according to FIG. 2 (1, Spirotop1,).

Claims (40)

"Device for venting pipe systems" claims: ¢ Device for venting and / or degassing, in particular absorption degassing of piping systems with a liquid circuit, preferably a water circuit, with a housing, at the upper end of which a valve with a protruding into the housing Valve needle is arranged on which a float with a float needle can be moved in height is suspended so that the float (21) is arranged freely movable in height on the float needle (18) and the float needle (18) and, if applicable, the housing (1) are dimensioned so long that when the pressure increases - up to a desired value - still a sufficient safety margin between the water surface (26) and the valve (8, II, 12) remains. 2. Apparatus according to claim 1, d a d u r c h g e -k e n n z e i c h n e t that the safety margin for a desired pressure increase to 6 bar is laid out. 3. Apparatus according to claim 1 or 2, d a d u r c h g e k e now z e i c h n e t that the valve needle (15) and the float needle (18) interlocking Eyes (17, 19) are connected to one another at their ends. (Fig. 1) 4. Device according to one or more of claims 1 to 3, d u r c h g e n n n z e i c h n e t that the eye (17) the valve needle (15) runs in a horizontal plane and is as small as possible Diameter. 5. Device according to one or more of claims 1 to 43 d a D e c h e k e n n e n n e i nted that the at the upper end of the float needle (18) provided eyelet (19) is elongated. 6. Device according to one or more of claims 1 to 4, d a d u r c h g e.k e n n e i c h n e t that the at the upper end of the float needle (18) provided eyelet (39, 47a> hook-shaped open and the upper Housing wall has a central depression directed towards the float needle (18) (38) as a needle stop. (Fig. 2, 3, 5) 7. Apparatus according to claim 1, g e k e nnn z e i c h -n e t d u r c h a closed or open eyelet (47) at the top End of the float needle (18) with an extension provided above the eyelet (47) (48), which can be moved longitudinally in a guide (46) in the upper housing wall, however limited in its upward movement, what is held by a straight line Execution of the valve needle (15), which extends through the Schw-tmmernadtlöse. (Fig. 4, 6) 8. Apparatus according to claim 7, d a d u r c h g e -k e n n z e i c h n e t that the eyelet (47b) running essentially in a vertical plane is formed by a loop from a 3600 turn of the float needle, wherein the free end of the loop represents the longitudinally movable upper extension (48). (Fig. 6d) 9. Apparatus according to claim 7, d a d u r c h g e -k e n n z e i c h n e t that the eyelet (47 is made of an arcuate, preferably more than semicircular, lateral, essentially vertical bulge the float needle (18) consists, with the left above the bulge free Float needle end represents the longitudinally movable upper extension (48). (Fig. 6c) 10. The device according to one or more of claims 1 to 9, g e k A stop (20), preferably in the form of a Bend at the lower end of the float needle (18). 11. The device according to one or more of claims 1 to 10, d a d u r c h g e k e n n n z e i c h n e t that the bend (41) is acute-angled and resilient as self-locking, only on one side, from below from the float (21) during its assembly to be passed fuse is formed. 12, device according to one or more of claims 1 to 5, d a d u r c h g e k e n n n z e i c h n e t that the housing (1) with a lower and an upper stop (23, 24) for the float (21) is provided. (Fig. 1) 13. Device according to one or more of claims 1 to 11, and possibly 12, g e k e n n -z e i c h n e t d u r c h an upper one Stop for the float (21) on the float needle (18) in its upper area. 14. The apparatus of claim 13, d a d u r c h g e -k e n n z e i c h n e t that the stop is below the eyelet (19) of the float needle (18) is located. 15. The apparatus of claim 13 or 14, d a d u r c h g e k e n It should be noted that the stop (24a) consists of a float needle deformation, preferably there is a lateral bulge or crank. (Fig. 1) 16. Device according to one or more of claims 1 to 15, d u r c h g e k e n n. z e i c h n e t that the closing force of the valve (8, 11, 12) by turning a closing body (11) is continuously adjustable on a spring (14). 17. The device according to one or more of claims 1 to 16, d a d u r c h g e k e n n n z e i c h n e t that through the valve body (8) from the inside to the outside a labyrinth, preferably a right-angled hole (27) runs. 18. Device according to one or more of claims 1 to 17, d a d u r c h g e k e n n n z e i c h n e t that the float (21) is dimensioned in such a way is that a desired large or small, free water surface (25, 26) between the float (21) and the inner wall of the housing remains. 19. The device according to one or more of claims 1 to 18, g This is not possible because the housing is made up of several parts (1). 20. Device according to one or more of claims 1 to 19, d a d u r c h g e k e n n n z e i c h n e t that the housing (1) consists of a support part (2; 31, 42) and a head part (5; 30) is assembled. 21. Device according to one or more of claims 1 to 20, g e k e n n a l a g e r c h a gas- and liquid-tight screw connection of the supporting part (2; 31, 42) with the head part (5; 30). 22. Device according to one or more of claims 1 to 21, d a d u r c h g e k e n n n z e i c h n e t that the support part (31) as a connecting part Has circuit connection, while the head part (30) as a ventilator, the valve (8, 11, 12) and picks up the float (21) with float needle (18). ("Spirotop" according to Fig. 1, 2 and 4). 23. The device according to claim 22, d a d u r c h g e -k e n n z e i c h n e t that the circuit connection as a vertical coaxial connection piece in The bottom of the support part (31) is provided 24. Device according to one or more of claims 1 to 21, that the support part (42) has at least two circuit connections (43) as a connecting part and separator and a gas separator, while the head part (30r as a vent the valve (8, 11, 12) carries and receives the float (21) with float needle (18). ("Spirovent" according to FIGS. 3, 5 and 6). 25. The device according to claim 24, d a by c h g e -k e n n z e i c h n e t that the gas separation device consists of a wire cage. 26. The device according to claim 24, or 25, g e k e n n -z e i c h n e t d u r c h two connecting pieces lying opposite one another in alignment on a horizontal axis (43) in the bottom area of the support part (31), which is also a coaxial wire cage to the axis of the housing (1) arranged carrier tube (44) contains, on the in itself In a known manner, several turns of a wire helix (45) are wound in a helical manner are. 27. Device according to one or more of claims 1 to 26 5 g e k e n n n n z e i c h n e t d u r c h a separating and sealing cap (32, 49, 58) between 'supporting part (31) and head part (30). 28. The device according to claim 27, d a d u r c h g e -k e n n z e i c h n e t that the cap (32, 49, 58) sealing and non-detachable with the head part (30) connected, preferably glued and at least one connection or. liquid and / or has gas passage opening. 29. The device according to claim 27 or 28, d a d u r c h g e k e n it is indicated that the cap (32, 49, 58) has a central recess (33), which in the installed state down into the support part (31, 42) and there if necessary protrudes into the support tube (44) and designed as a guide for the lower end of the float needle is. 30. The device according to claim 29, d a d u r c h g e -k e n n z e i c h n e t that the recess (33) is designed as a through opening. 31. Device according to one or more of claims 27 to 30, at least one concentrically arranged connection opening in the cap (32, 49). 32. Apparatus according to claim 31, d a d u r c h g e -k e n n z e i c h n e t that connection opening (52) or connection openings (35, 55, 62) the The recess (33) surrounds or surrounds. 33. Apparatus according to claim 31 or 32, g e k e n n -z e i c h n e t d u r c h two semicircular or sickle-shaped, symmetrically arranged Connection openings (62) (Fig. 6). 34. Apparatus according to claim 31 or 32, g e k e n n -z e i c h n e t preferably evenly distributed by several on a concentric circle arranged, preferably circular, connecting openings (55) (e.g. Fig. 5a, 5b). 35. Device according to one or more of claims 31 to 34, d a d u r c h e k e n n n z e i c h n e t - that the connecting openings (55) in such a way are deep-drawn that they are each surrounded by an edge or collar (56), which protrude downward into the support part (31, 42) when the cap is installed. 36. Device according to one or more of claims 1 to 35, characterized characterized t that the cap (32, 49) in the installed state down into the Support part (31, 42) is curved (Fig. 2, 3, 4 and 5). 37. Device according to one or more of claims 1 to 35, g A flat design of the cap (58) is not shown. (Fig. 6) 38. Device according to one or more of claims 1 to 37, d a d u r c h e k e k e n n n n e i n e t that the cap on its side facing the head part with several knobs or beads for possible support of the swimmer in his lowest layer is provided. 39. ~ Device according to one or more of claims 1 to 38, in particular according to claim 37, g e k e n n -z e i c h n e t d u r c h a preferably ring-shaped, in particular double ring-shaped sealing support (59) on the underside of the float. 40. Apparatus according to claim 39, d a d u r c h g e -k e n n z e i c h n e t 9 that the sealing support (59) consists of plastic ring seals.