HRP950596A2

HRP950596A2 - Apapter fitting for the selective connection of a heater

Info

Publication number: HRP950596A2
Application number: HRA2368/94A
Authority: HR
Inventors: Hans-Peter Toth
Original assignee: Herz Armaturen Ag
Priority date: 1994-12-20
Filing date: 1995-12-13
Publication date: 1997-04-30
Also published as: AT404628B; HRP950596B1; DE29500325U1; WO1996019703A1; ATA236894A

Description

Izum se odnosi na armaturu za priključak nekog termostatom upravljanog grijaćeg tijela na dovodne i odvodne cijevne vodove dvocijevnog grijaćeg postrojenja, s kućištem u kojem su predviđena dva kanala, od kojih jedan kanal povezuje nastavak za rastavljivi priključak dovodnog cjevovoda s nastavkom za rastavljivi priključak ulaznog otvora grijaćeg tijela ili neke armature koja vodi istoj, dok drugi kanal povezuje nastavak za rastavljivi priključak povratnog cjevovoda s jednim daljnjim nastavkom za rastavljivi priključak ispusnog otvora grijaćeg tijela ili nekom time vezanom armaturom, čija su oba kanala kroz spojni kanal međusobno povezana i u kojem je smješten jedan ventil. The invention relates to a fitting for connecting a thermostat-controlled heating body to the inlet and outlet pipelines of a two-pipe heating plant, with a housing in which two channels are provided, one of which connects the extension for the detachable connection of the supply pipeline with the extension for the detachable connection of the inlet opening of the heating body or some fitting that leads to the same, while the other channel connects the extension for the detachable connection of the return pipeline with one further extension for the detachable connection of the discharge opening of the heating body or some related fitting, both channels of which are connected to each other through the connecting channel and in which one valve is located .

Takva armatura je poznata (WO 94/18509). Such an armature is known (WO 94/18509).

Uobičajeno se primjenjuje u modernim postrojenjima centralnog grijanja termostatski ventil za upravljanje struje grijaćeg sredstva do pojedinih grijaćih tijela. Pri tome se pokazalo, da kod zatvarajućeg termostatskog ventila nastaju ometajući šumovi strujanja, ako se razlika između tlaka grijaćeg medija u dovodnom cjevovodu i tlaka grijaćeg medija u povratnom cjevovodu prekoračuje za stanovitu mjeru. Za prigušivanje ovih ometajućih šumova bilo je načinjeno već više prijedloga. Ova poznata rješenja obuhvaćaju uvijek više ili sva grijaća tijela postrojenja zajednički i često ne zadovoljavaju, jer u pravilu spomenuti diferentni tlak između dovodnog voda i povratnog voda nije za sva grijaća tijela isti, a prije svega se, zbog dinamičkog ponašanja upravljanja termostatskih ventila, odnosi kod tlakova pri svakom grijaćem tijelu stalno mijenjaju. A thermostatic valve is commonly used in modern central heating plants to control the flow of heating medium to individual heating elements. In doing so, it was shown that with the closing thermostatic valve, disruptive flow noises occur, if the difference between the pressure of the heating medium in the supply pipeline and the pressure of the heating medium in the return pipeline is exceeded by a certain amount. Several proposals have already been made to dampen these disturbing noises. These known solutions always include more or all the heating elements of the plant jointly and often do not satisfy, because as a rule the mentioned differential pressure between the supply line and the return line is not the same for all heating elements, and above all, due to the dynamic behavior of the control of the thermostatic valves, it refers to pressures at each heating element are constantly changing.

Nadalje treba imati na umu, da u nekom dvocijevnom grijaćem postrojenju struja grijaćeg sredstva biva potpuno prekinuta, ako su svi ventili grijaćih tijela zatvoreni. Za stanovite vrste gradnje postrojenja, može biti pri tome važno, da se osigurava minimalni optok vode. Furthermore, it should be kept in mind that in a two-pipe heating system, the flow of the heating medium is completely interrupted if all the valves of the heating elements are closed. For certain types of plant construction, it may be important to ensure minimum water circulation.

Izum si stavlja u zadatak, toliko poboljšati armaturu uvodno opisanog načina, da se kod njima pripadajućih grijaćih tijela, spomenuti problem ometajućih šumova kod zatvarajućeg termostatskog ventila pouzdano i neovisno o stanju drugih elemenata grijaćeg postrojenja ukloni, te da se pobrine i za održavanje minimalne količine vode u optoku. Izum rješava ovaj zadatak tako, da je ventil u spojnom kanalu diferentno-tlačni prostrujni ventil, koji kod prekoračenja unaprijed određenog diferentnog tlaka između onih, od oba kanala vođenih struja grijaćeg medija otvara i na taj način ograničava diferentni tlak odnosno osigurava nužni najmanji protok. Izum polazi pri tome od saznanja, da kod poznate konstrukcije postojeći regulacioni i zaporni ventil otpada i da može biti nadomiješten s jednim diferentno-tlačnim prostrujnim ventilom, koji ograničava diferentni tlak za svaki pripadajućem grijaćem tijelu montiran termostatski ventil. Ovaj način izvedbe ima prednost neovisnosti odgovarajućeg grijaćeg tijela od drugih grijaćih tijela, a bez da je korišten, u uspoređenju s uvodno opisanim poznatim konstrukcijama, dodatni trošak. The invention sets itself the task of improving the armature of the manner described in the introduction, so that with the heating elements belonging to them, the aforementioned problem of disturbing noises at the closing thermostatic valve is reliably and independently of the condition of other elements of the heating plant removed, and that it also takes care of maintaining a minimum amount of water in circulation. The invention solves this task in such a way that the valve in the connecting channel is a differential-pressure flow valve, which opens when the pre-determined differential pressure between those of both channels is exceeded and thereby limits the differential pressure, i.e. ensures the necessary minimum flow. The invention is based on the knowledge that with the known construction the existing regulating and shut-off valve is discarded and can be replaced with one differential-pressure flow valve, which limits the differential pressure for each thermostatic valve mounted on the heating body. This method of execution has the advantage of the independence of the respective heating body from other heating bodies, and without using, in comparison with the known constructions described in the introduction, an additional cost.

U spojnom kanalu, u obliku H-izvedbenih armatura, uključeni ventili su na područjima drugih struka (mješalice) poznati (WO 90/04141, AT-B 389,578). Tamo se radi o napravama za miješanje tople i hladne vode, gdje se na omjer miješanja utječe preko ventila. Takve armature su za priključak grijaćih tijela neprikladne. In the connecting channel, in the form of H-type fittings, included valves are known in the areas of other waists (mixers) (WO 90/04141, AT-B 389,578). There we are dealing with devices for mixing hot and cold water, where the mixing ratio is influenced by the valve. Such fittings are unsuitable for connecting heating elements.

Prema prednosnom izvedbenom obliku je predviđen u svakom kanalu jedan zaporni ventil i on račva spojni kanal od kanala koji vodi dolazeću struju prije otvora za prostrujavanje u pripadajućem zapornom ventilu, te ulazi u kanal koji vodi povratnu struju iza otvora za prostrujavanje u pripadajućem zapornom ventilu, svaki puta gledano u smjeru strujanja grijaćeg medija. Time je zajamčena ta prednost, da nakon zatvaranja obaju zapornih ventila, može biti grijaće tijelo odmontirano, bez da treba prije toga isprazniti grijaće postrojenje. Armatura ostaje u takvom slučaju priključena na dovodne i odvodne cjevovode postrojenja. According to the preferred embodiment, one shut-off valve is provided in each channel and it splits the connecting channel from the channel that conducts the incoming current before the flow opening in the associated shut-off valve, and enters the channel that leads the return flow behind the flow opening in the associated shut-off valve, each times viewed in the direction of flow of the heating medium. This guarantees the advantage that after closing both shut-off valves, the heating body can be removed, without having to empty the heating system beforehand. In such a case, the armature remains connected to the supply and discharge pipelines of the plant.

Prema prednosnom izvedbenom obliku izuma diferentno-tlačni prostrujni ventil je oprugom opterećeni ventil, iako je općenito primjenjiva i drugačija konstrukcija diferentno-tlačnih ventila. Prednosno je u okviru izuma sila zatvaranja diferentno-tlačnog prostrujnog ventila podesia tako da diferentni tlak, kod kojeg ovaj ventil otvara i time stvara jedan kratki spoj sa na armaturu priključenim grijaćim tijelom, kojeg se može prilagoditi predstojećim prilikama. Uz to postoji jedna osobito povoljna konstrukcija u okviru izuma u tome, da diferentno-tlačni prostrujni ventil ima s ventilskim dosjedom zajedno djelujuće zaporno tijelo, npr. ventilski tanjur, koji je preko opruge opterećen u smjeru zatvaranja, te koje se oslanja na premjestivi protuležaj. Svrsishodno je predviđen u kućištu armature jedan otvor, kroz koji je protuležaj izvana pristupačan i podesiv, kako bi se moglo u zadanom slučaju provesti bez problema podešavanje odnosno premještanje diferentno-tlačnog prostrujnog ventila. According to the preferred embodiment of the invention, the differential-pressure flow valve is a spring-loaded valve, although a different construction of differential-pressure valves is generally applicable. Preferably, within the framework of the invention, the closing force of the differential-pressure flow valve is adjusted so that the differential pressure at which this valve opens and thereby creates a short circuit with the heating body connected to the armature, which can be adjusted to the upcoming circumstances. In addition, there is a particularly favorable construction within the scope of the invention in that the differential-pressure flow valve has a closing body acting together with the valve seat, for example, a valve disc, which is spring-loaded in the direction of closing, and which rests on a movable counter-bearing. An opening is purposefully provided in the armature housing, through which the counter bearing is accessible and adjustable from the outside, so that in the given case the adjustment or relocation of the differential-pressure flow valve can be carried out without problems.

Za ugradnju diferentno-tlačnog prostrujnog ventila je svrsishodno, otvor za prolaznu struju barem jednog zapornog ventila dimenzionirati većim nego što je presjek diferentno-tlačnog prostrujnog ventila, tako da može biti taj ventil umetnut i montiran kroz otvor za protok u kućište adapterske armature. For the installation of a differential-pressure flow valve, it is expedient to dimension the flow opening of at least one shut-off valve larger than the cross-section of the differential-pressure flow valve, so that the valve can be inserted and mounted through the flow opening in the housing of the adapter armature.

U crtežima su izvedbeni primjeri predmeta izuma shematski prikazani. Slika 1 prikazuje presjek kroz prvi izvedbeni primjer. Slika 2 prikazuje u većem mjerilu presjek kroz diferentno-tlačni prostrujni ventil i njegov smještaj u kućište. Slika 3 je presjek prema crti III-III Sl. 2. Slika 4 prikazuje jednu izvedbenu varijantu sa Sl. 2 i Slika 5 prikazuje u presjeku jedan daljnji izvedbeni primjer. In the drawings, implementation examples of the subject of the invention are shown schematically. Figure 1 shows a section through the first exemplary embodiment. Figure 2 shows on a larger scale the section through the differential-pressure flow valve and its placement in the housing. Figure 3 is a cross-section along line III-III of Fig. 2. Figure 4 shows one embodiment of FIG. 2 and Figure 5 shows a cross-section of a further exemplary embodiment.

Kod izvedbenog oblika prema Sl. 1 do 3 ima adapterska armatura 1 kućišta 2, koja uglavnom prikazuje oblik slova H. Oba vertikalna kraka oblika H tvore dva paralelno jedno spram drugog prolazeća kanala 3, 4, a horizontalni krak od H je tvoren preko oba kanala 3, 4 povezujućeg, na kanale 3, 4 normalno usmjernog spojnog kanala 5. Oba donja kraja kanala 3, 4 su predviđena uvijek s jednim nastavkom 6 odnosno 7 s navojima 8 za rastavljivi priključak na oba cjevovoda dvocijevnog grijaćeg postrojenja. Pretpostavlja se da dovod tvori nastavak 6, a nastavak 7 odvod za grijaći medij, što je naznačeno strelicama 9. Oba prema gore usmjerena kraja kanala 3, 4 su predviđena s nastavcima 10 odnosno 11 za rastavljivi priključak na neprikazano, s termostatom opremljeno grijaće tijelo ili na jednu njemu vodeću armaturu 12. Kako bi mogli prihvatiti netočnosti u montaži oba su nastavka 10, 11 izvedena s ravnim čeonim plohama 13, na koje su položene plosne brtve 14, koje bivaju stisnute preko priključenih dijelova 15 armature ili sličnog. Pri tome su ovi dijelovi predviđeni s navojima 16, na koje se mogu navrntui preklopne matice 17, koje na zazor okružuju nastavke 10, 11. Preklopne matice 17 oslanjaju se na protuležajima 18, koji su pridržani uskočnicima upuštenim u vanjsku stijenku nastavaka 10, 11. In the embodiment according to Fig. 1 to 3 has an adapter armature 1 of the housing 2, which mainly shows the shape of the letter H. Both vertical arms of the shape of H form two channels 3, 4 passing parallel to each other, and the horizontal arm of H is formed over both channels 3, 4 connecting, on channels 3, 4 of the normally directional connecting channel 5. Both lower ends of channels 3, 4 are always provided with one extension 6 or 7 with threads 8 for detachable connection to both pipelines of the two-pipe heating plant. It is assumed that the inlet forms the extension 6, and the extension 7 the drain for the heating medium, which is indicated by arrows 9. Both upwardly directed ends of the channels 3, 4 are provided with extensions 10 and 11, respectively, for a detachable connection to a heating body, not shown, equipped with a thermostat or to one armature leading to it 12. In order to accommodate inaccuracies in assembly, both extensions 10, 11 are made with flat front surfaces 13, on which flat seals 14 are laid, which are pressed over the connected parts 15 of the armature or similar. At the same time, these parts are provided with threads 16, on which the folding nuts 17 can be screwed, which surround the extensions 10, 11 with a gap.

Svaki kanal 3, 4 je prožet jednom stijenkom 19 odnosno 20, koja povezuje međusobno jedne prema drugima okrenute krajeve nastavaka 6, 10 odnosno 7, 11. Svaka od tih stijenki 19, 20 ima središnji odsječak 21, koji prolazi u smjeru osi kanala 3,4 odnosno okomito spram osi spojnog kanala 5. Svaki odsječak 21 ima kružni prolazni otvor 22 za strujanje, koji tvori dosjed ventila 23 za zaporno tijelo 24 odnosno 25 zapornog ventila 26 odnosno 27, kojem može biti odgovarajući kanal 3 odnosno 4 zatvoren. Smjer premještanja svakog od zapornih tijela 24, 25 je pri tome u smjeru osi spojnog kanala 5 odnosno okomito na osi kanal 3, 4 i leži u ravnini, koja je upeta preko osi obaju nastavaka 10, 11 koji služe za priključenje grijaćeg tijela odnosno njegovih armatura. Smjerovi premještanja obaju zapornih tijela 24, 25 su koaksijalni jedni spram drugih, a također koaksijalni spram aksijalnog smjera spojnog kanala 5. Oba zaporna tijela 24, 25 su uvrnuta u navojne nastavke 28 odnosno 29 kućišta 2, te izvana preko šesterokuta 30 ili slično premjestivi i pomoću brtvi 31 zabrtvljeni. Navrnuti završni poklopci 32 zatvaraju nastavke 28, 29. Na sl. 1 desno ležeći navojni izdanak 29 tvori otvor za pražnjenje, kroz koji može odgovarajuće grijaće tijelo biti ispražnjeno. Uz to je u navojni izdanak 29 uvrnut zaporni dio 33, koji može biti zakretan pomoću unutarnjeg šesterokuta 34. Brtva 31 sjedi u prstenastom utoru ovog zapornog dijela 33 i obuhvaća jedan produžetak zapornog tijela 25. Ako se to zaporno tijelo 25 uvrne toliko daleko, da na njegovom gornjem obodnom dijelu u kanalu 4 nalazeća se grijaća tekućina može strujati mimo, tako se može nakon izvijanja njegovog zapornog dijela 33 isprazniti grijaće tijelo. Each channel 3, 4 is permeated by one wall 19 or 20, respectively, which connects the mutually facing ends of extensions 6, 10 or 7, 11. Each of these walls 19, 20 has a central section 21, which passes in the direction of the axis of the channel 3, 4, respectively, perpendicular to the axis of the connecting channel 5. Each section 21 has a circular passage opening 22 for flow, which forms the seat of the valve 23 for the stop body 24, respectively 25 of the stop valve 26, respectively 27, to which the corresponding channel 3, respectively 4 can be closed. The direction of movement of each of the blocking bodies 24, 25 is in the direction of the axis of the connecting channel 5, i.e. perpendicular to the axis of the channel 3, 4 and lies in the plane, which is clamped over the axis of both extensions 10, 11 that serve to connect the heating body or its fittings . The directions of movement of both locking bodies 24, 25 are coaxial with each other, and also coaxial with the axial direction of the connecting channel 5. Both locking bodies 24, 25 are screwed into the threaded extensions 28 and 29 of the housing 2, respectively, and externally via the hexagon 30 or similarly movable and sealed with gaskets 31. The screwed end caps 32 close the extensions 28, 29. In Fig. 1, the threaded protrusion 29 lying on the right forms an opening for emptying, through which the corresponding heating body can be emptied. In addition, a locking part 33 is screwed into the threaded protrusion 29, which can be rotated by means of an internal hexagon 34. The seal 31 sits in the annular groove of this locking part 33 and includes one extension of the locking body 25. If this locking body 25 is twisted so far, that on its upper peripheral part in the channel 4, the heating liquid can flow past, thus the heating body can be emptied after bending its closing part 33.

U svrhu prigušivanja šumova kod zatvaranja na grijaće tijelo priključenog termostatskog ventila ili za održavanje nužnog najmanjeg strujanja kod zatvorenog termostatskog ventila je u spojnom kanalu 5 umetnut jedan ventil 35, koji je izveden kao diferentno-tlačni prostrujni ventil 36. Njegovo kućište 37 je uvrnuto u jednu navojnu bušotinu 38 stijenke 39 spojnog kanala 5. Diferentno-tlačni prostrujni ventil 36 građen je na način opružno opterećenog ventila i posjeduje pri tome jedno s ventilskim dosjedom 40 zajedno djelujuće zaporno tijelo 41 u obliku ventilskog tanjura, koji je opterećen oprugom 42 oslonjenom na protuležaj 43. Kod izvedbenog oblika prema Sl. 1 do 3 je ovaj protuležaj 43 smješten nepokretno i načinjen od unutarnje prirubnice čahurastog produžetka 44 kućišta 37 diferentno-tlačnog prostrujnog ventila 36, čiji produžetak 44 je predviđen s više prodora 45, kroz koje može kod otvorenog ventila 36 medij strujati. Kako bi se zaporno tijelo 41 predviđeno s npr. kružno smještenim vodećim rebrima 46 (Sl. 2, 3), koja su vođena u provrtu 47 kućišta 37. Ventil 36 otvara čim je tlak grijaćeg medija, u pravilu je topla voda, u dovodnom kanalu 3 za takvu mjeru viši od tlaka istog medija u povratnom strujnom kanalu 4, da je sila zaporne opruge 42 savladana. Čim je razlika tlakova dovoljno izjednačena, opet zatvara ventil 36 pod djelovanjem opruge 42. In order to dampen the noise when the thermostatic valve connected to the heating body is closed or to maintain the necessary minimum flow when the thermostatic valve is closed, one valve 35 is inserted in the connection channel 5, which is designed as a differential-pressure flow valve 36. Its housing 37 is screwed into a the threaded bore 38 of the wall 39 of the connecting channel 5. The differential-pressure flow valve 36 is built in the manner of a spring-loaded valve and has a closing body 41 acting together with the valve seat 40 in the form of a valve plate, which is loaded by a spring 42 resting on a counter-bearing 43 In the embodiment according to Fig. 1 to 3, this counter bearing 43 is located stationary and is made of the inner flange of the sleeve extension 44 of the housing 37 of the differential-pressure flow valve 36, whose extension 44 is provided with several penetrations 45, through which the medium can flow when the valve 36 is open. In order for the closing body 41 to be provided with, for example, circularly located guide ribs 46 (Fig. 2, 3), which are guided in the bore 47 of the housing 37. The valve 36 opens as soon as the pressure of the heating medium, as a rule, is hot water, in the supply channel 3 for such a measure higher than the pressure of the same medium in the return flow channel 4, that the force of the stop spring 42 is overcome. As soon as the pressure difference is equalized enough, it closes the valve 36 again under the action of the spring 42.

Kako bi se omogućila ugradnja diferentno-tlačnog prostrujnog ventila 36 u navojnu bušotinu 38, presjek otvora 22 za prostrujavanje i svijetli presjek navojnog nastavka 28 su veći od presjeka diferentno-tlačnog prostrujnog ventila 36, tako da se istog može provesti kroz navojni nastavak 28 i otvor 22 za prostrujavanje. Alternativno tome, mogao bi na spojni kanal 5 biti postavljen bočno jedan nastavak, u kojem je smješten diferentno-tlačni prostrujni ventil, čije zaporno tijelo surađuje s ventilskim dosjedom u spojnom kanalu 5 prožimajuće stijenke. U takvom slučaju bila bi moguća ugradnja diferentno-tlačnog prostrujnog ventila 36 i izvana, tako da taj ventil ne treba voditi kroz otvor 22 za prostrujavanje u kućište 2. In order to enable the installation of the differential pressure flow valve 36 in the threaded well 38, the cross section of the flow opening 22 and the clear section of the threaded extension 28 are larger than the cross section of the differential pressure flow valve 36, so that it can be passed through the threaded extension 28 and the opening 22 for current flow. Alternatively, an extension could be placed laterally on the connecting channel 5, in which a differential-pressure flow valve is located, the closing body of which cooperates with the valve seat in the connecting channel 5 of the penetrating wall. In such a case, it would be possible to install the differential-pressure flow valve 36 from the outside, so that valve does not need to be led through the opening 22 for flow into the housing 2.

Kod izvedbene varijante prema Sl. 4 je diferentno-tlačni prostrujni ventil 36 u svojoj sili zatvaranja podesiv. Radi toga je protuležaj 43 izveden na svom vanjskom opsegu kao navojem 48 opremljen prsten i uvrnut u unutarnji navoj produžetaka 44. Uz premještanje dubine uvrtanja protuležaja 43 može se mijenjati sila zatvaranja opruge 42, a time i tlak otvaranja ventila 36. In the variant according to Fig. 4, the differential pressure flow valve 36 is adjustable in its closing force. For this reason, the counter bearing 43 is made on its outer circumference as a ring equipped with a thread 48 and screwed into the internal thread of the extensions 44. By moving the depth of screwing of the counter bearing 43, the closing force of the spring 42 and thus the opening pressure of the valve 36 can be changed.

Za ovo potrebno zakretanje protuležaja 42 može se provesti pomoću jednog alata nakon skidanja poklopca 32 te izgradnje zaklopnog dijela 33, te zapornog ventila 27, pri čemu taj alat hvata kroz otvor navojnog produžetka 27 i kroz otvor 22 za prostrujavanje. For this, the necessary rotation of the counter bearing 42 can be carried out using one tool after removing the cover 32 and building the shutter part 33 and the shut-off valve 27, whereby this tool catches through the opening of the threaded extension 27 and through the opening 22 for flow.

Da bi se ipak to premještanje protuležaja 43 moglo provesti i bez izrade zapornog ventila 27 i zaklopnog dijela 33, načinjena je izvedbena varijanta prema Sl. 5. Kod toga je s protuležajem 43, koji je uvrnut kao kod izvedbenog oblika prema Sl. 4, u unutarnji navoj nastavka 44 kućišta 37 diferentno-tlačnog prostrujnog ventila 36, vezana prenosiva motka 49, koja je zabrtvljeno umetnuta kroz središnji provrt 50 zapornog tijela 25 i na svojem vanjskom kraju predviđena s jednim utorom 51 za zatvaranje nekog ključa za vijke ili slično. Na taj način može se tlak zatvaranja diferentno-tlačnog prostrujnog ventila 36 premještati izvana, za što je potrebno skinuti jedino poklopac 32. In order to be able to move the counter bearing 43 without making the shut-off valve 27 and the shutter part 33, a design variant according to Fig. 5. In this case, with the counter bearing 43, which is twisted as in the embodiment according to Fig. 4, in the internal thread of the attachment 44 of the housing 37 of the differential-pressure flow valve 36, a portable pole 49 is tied, which is inserted in a sealed manner through the central hole 50 of the closing body 25 and at its outer end is provided with one slot 51 for closing a screw key or the like . In this way, the closing pressure of the differential-pressure flow valve 36 can be moved from the outside, for which only the cover 32 needs to be removed.

Kod izvedbenih oblika prikazanih na slikama, diferentno-tlačni prostrujni ventil 36 smješten je uvijek u istoj osi s oba zaporna ventila 26, 27. Ovaj smještaj je iz proizvodnih razloga najpovoljniji. Bilo bi ipak moguće predvidjeti u spojnom kanalu 5 jedan zaporni odnosno regulacioni ventil, kao što je poznato iz uvodno spomenutog literaturnog mjesta. In the embodiments shown in the pictures, the differential-pressure flow valve 36 is always located in the same axis with both shut-off valves 26, 27. This placement is the most favorable for production reasons. However, it would be possible to foresee in the connection channel 5 a shut-off or regulation valve, as is known from the literature reference mentioned in the introduction.

Diferentno-tlačni prostrujni ventil 36 mogao bi tada biti smješten u odvojenom spojnom kanalu 5, koji bi međusobno povezivao oba produžetka 10, 11. The differential-pressure flow valve 36 could then be located in a separate connecting channel 5, which would connect both extensions 10, 11 to each other.

Zaporno tijelo 24 zapornog ventila 26 može biti dovedeno u međupoložaje, kao što je na poznati način moguće postići predpodešavanje grijaćem tijelu dovedene količine grijaćeg medija. The closing body 24 of the closing valve 26 can be brought to intermediate positions, as it is possible to pre-adjust the amount of heating medium supplied to the heating body in a known manner.

Claims

1. Armature 1 for the connection of a thermostatically controlled heating body to the inlet and outlet pipelines of a two-pipe heating plant with housing 2, in which two channels 3, 4 are provided, one of which channel 3 connects the extension 6 for the detachable connection of the supply pipeline with the extension for the detachable connection of the inlet opening of the heating element or one of the same leading fittings, while the second channel 4 connects the extension 7 for the detachable connection of the return pipeline with a further extension 11 for the detachable connection of the discharge opening of the heating element or the fitting connected to it, both channels 3, 4 of which are via the connecting channel 5 interconnected and in which the valve 35 is located, characterized by the fact that the valve (35) in the connecting channel (5) is a differential-pressure flow valve (36), which when the predetermined differential pressure between the two channels (3, 4) is exceeded of the medium heating body opens and thus limits the differential pressure, ie ensures the necessary minimum flow.

2. Armature according to claim 1, characterized by the fact that one stop valve (26 or 27) is provided in each of the channels (3, 4) and that the differential-pressure flow valve (36) containing the connecting channel (5) from the drain current leading channel (3) in front of the flow opening (22) of the associated shut-off valve (26) forks, and enters the return flow through the guiding channel (4) behind the flow opening (22) of the associated stop valve (27) each time viewed in the direction of flow.

3. Armature according to claim 1 or 2, characterized in that the differential-pressure flow valve (36) is a spring-loaded valve.

4. Armature according to one of claims 1 to 3, characterized in that the closing force of the differential pressure flow valve (36) is adjustable.

5. Armature according to claims 3 and 4, characterized by the fact that the differential-pressure flow valve (36) has a closing body (41) acting together with the valve seat (40), for example, a valve plate, which is loaded via a spring (42) in in the direction of closing, which rests on a movable counter-bearing (43).

6. Armature according to claim 5, characterized in that the counter bearing (43) can be screwed into the thread of the extension (44) of the housing (37) of the differential pressure flow valve (36), whose extension is provided with penetrations (45) for the heating medium.

7. Armature according to claim 6, characterized by the fact that one opening is provided in the housing (2), for example, made of a threaded extension (29) for receiving a shut-off valve (27), through which the counter bearing (43) is externally accessible and movable.

8. Armature according to claim 7, characterized by the fact that for the transmission of rotation, a pole (49) is connected to the counter bearing (43), which is axially routed and sealed through one of the shut-off valves (26, 27), and can be turned from the outside, e.g. by means of a tool .

9. Armature according to one of claims 2 to 8, characterized in that the flow opening (22) of at least one of the stop valves (26, 27) is larger than the cross section of the differential pressure flow valve (36).

10. Armature according to one of the claims 1 to 9, characterized by the fact that the connection channel (5) is connected laterally with an extension for receiving a differential-pressure flow valve (36), whose closing body works together with the opening, which is located in the wall , which permeates the connecting channel (5).