DE2050354A1 - Expansion vessel, in particular pressure expansion vessel for hot water heating systems - Google Patents

Description

Expansion vessel7 in particular pressure expansion vessel for hot water heating systems.

The invention relates to an expansion vessel, in particular a pressure expansion vessel for hot water heating systems, whereby the expansion vessel consists of at least two cylindrical, cup-shaped, coaxially arranged to one another, welded in the assembled state Divide, in the interior of which there is one; The membrane dividing the vessel on the cylindriscaen The vessel wall is arranged gas-tight and fixed.

Expansion vessels in which an air cushion is arranged are known that is in direct contact with the water.

This design is disadvantageous because of the temperature fluctuations of the water cycle, ituft from the air cushion is continuously absorbed by the water or is absorbed, which leads to strong pressure fluctuations in the closed heating system respectively.

leads to undesirable air deposition.

An expansion vessel is also known that consists of two hemispheres - is formed, in which one divides the vessel into a hip and a water bevel The membrane is clamped between the two hemispheres.

In another known pressure expansion vessel mentioned above Art, the vessel wall has a groove corresponding to the beaded edge of the membrane on, in which the membrane edge is clamped in the operative position by an expanding ring is.

There is yet another design for expansion vessels above known, in which the holder for the membrane edge from a membrane rim at least partially encompassing the inner wall of the vessel Approach exists.

These known expansion vessels mostly do their job satisfactorily. However, they are too expensive to manufacture, since both the production of the different large parts of the pressure expansion vessel, as well as the assembly of the membrane or the shaping assembly of the vessel parts is too expensive. Next has shown that in all of these constructions damage to the membrane by'die sharp edges of the holders of the membrane is to be feared and repeated for this reason heating systems failed The invention has the task of to improve the known designs of the pressure expansion vessels to the effect, ate a light exact and the effect of the vessel when using the simplest components guaranteeing installation is given.

This task is achieved according to the invention in that the vessel parts of the pressure expansion vessel are designed in the same way and d-- inside or outside of the Expansion vessel a ring is arranged so that the centering of the vessel parts of the pressure expansion vessel during assembly and the clamping of the Wuisrandes the membrane with these vessel parts is carried out through the ring.

The ring can according to an embodiment of the invention be arranged in abutment on the inside of the vessel wall and thereby at least one taper have its diameter, the ring within the taper one after bead pointing inwards and where. the ring at its tapered forehead rounded or folded inwards. The ring is in a vessel part of the expansion vessel arranged so that the folded face faces against the evil and that the on the vessel wall adjacent ring section over the abutting edge gravel part of the Expansion vessel protrudes and centers the other part of the expansion vessel.

Between the vessel part of the expansion vessel on which the ring is arranged is and the tapered section of the ring is the bead of the membrane inserted, whereby after inserting he membrane a cooperating with the bead of the ring and the membrane securing gas-tight arranged concentrically in this vessel part is.

According to a further embodiment of the invention, the ring on the outside of the vessel wall and covering the joint between the vessel parts, arranged, whereby the vessel parts in the area of the ring have a taper of their diameter of about the thickness of the wall of the ring and wherein the vessel parts close their ends facing one another have at least one inward-facing bevel wear.

The vessel parts preferably bear on their hands facing one another two bevels directed inwards or towards the bottom of the respective vessel parts, wherein these folds are formed so that the first fold is less than 90 ° and the sum of the first and second folds is 1800 or more. Of the The beaded edge of the membrane is placed between the fflng and the bevels of both Vessel parts clamped gas-tight.

These embodiments according to the invention make it essential Reduction in both production and production days achieved. The membrane, those in the previously known expansion vessels at the sharp ones Edges of the rings or appropriately designed vessel parts and damage as a result exposed, is attached securely and without damage. The ring fulfills at the same time two tasks, on the one hand it serves to center the vessel parts to the other he in cooperation with the expansion vessel the membrane.

Einze: units of the invention are explained with reference to drawings.

It shows FIG. 1 a partial section through an expansion tank according to FIG. a first embodiment of the invention Figure 2 is a partial section through a Expansion vessel according to a further embodiment of the invention.

The expansion vessel according to Figure 1 consists of the two equal out led cup-shaped vessel parts 1 and 2. Each of the vessel parts 1 and 2 carries in his Ground a connection for Ga ler water. In the vessel part 1 is the ring 3, for example fastened by spot welds or loosely attached. The major ZeJser the ring 3 has a taper in the a, that about the reinforced Edge 4a of the membrane 4 corresponds. The ring 3 is arranged in the vessel part 1 in such a way that that he is part of the ring 3 with the largest diameter, the Mante at the open end of the vessel part 1 protrudes and the tapered end of the ring 3 to the bottom of the vessel part 1 shows.

This tapered end of the ring 3 is provided with a fold 3a, but can also be rounded. The membrane 4 is in each case by a sink 3b tapered part of the ring 3 and the vessel part 1, which are concentrically arranged are fastened in a gastight manner in the cylindrical part of the vessel part 1. Vessel part 2 is pushed onto the protruding section of the ring 3 and welded attached to the vessel part 1. the contacts of the expansion vessel are expedient in the order that the tapered and provided with a bead -3o and fold 3a Ring 3. after placing the membrane 4 in the vessel part 1 to the required size is inserted. The ring 3 is then attached to the vessel part 1 by means of spot welds. However, this is not a condition of the invention. The ring 3 can also be with a be provided such a fit that it is in the desired position in the vessel part 1 remains. According to a further embodiment, the bead 4a of the membrane 4 clamp the ring 3 and the vessel part 1. There is also a gluing of the ring 7 possible according to the invention. Then a beading tool is used Concentric to the bead 3b of the ring 3, a bead la is attached to the vessel part 1, through which the membrane 4 is attached in a gas-tight manner. After pushing on the vessel part 2 on the protruding section of the ring 3, the vessel parts 1 and 2 are welded.

In the embodiment according to FIG. 2, there is an expansion vessel also made of two identical pot-shaped vessel parts 5 and 6, in the bottom of which the Connections for gas and water are arranged. The vessel parts 5 and 6 are included in its cylindrical part tapers up to the respective open dimension of the vessel part 5 or 6. The tapering preferably has a dimension that the wall thickness of the pushed onto the vessel parts 5 and 6 and connecting them Rings 7 corresponds. The cylindrical ring 7 is with its flat end faces the vessel parts 5 and 6 are welded. The edges of the vessel parts 5 and 6 have at least one, but preferably two, bevels, of which the first less than 900 and the sum of the first and second is preferably at least 1,800. By the first folds the bead-shaped edge 8a of the membrane 8 is clamped gas-tight, while the second fold avoids sharp edges that could cause damage of the membrane 8 moving in the expansion tank

Claims (7)

P a t e n t a n s p r ü c h e 1.) Expansion vessel, in particular Pressure expansion vessel for closed hot water heating systems, whereby the expansion vessel of two cylindrical, cup-shaped coaxially arranged in an assembled State of welded parts, inside of which the vessel dividing The diaphragm on the cylindrical wall of the vessel is gas-tight and fixed, ekcnnzeichen in that the vessel parts (1 and 2 or 6) of the pressure expansion vessel are the same and that a ring ( 3 or 7) is arranged so that the antrating of the vessel parts (, u. 2 or 5 u. 6) during assembly and clamping of the beaded edge t4G or 8a) of the membrane (4 or 8) with the vessel parts (1 and 2 or 5 and 6) through this ring (3 or 7) follows. 2.) expansion vessel according to claim 1, characterized in that a2 of the Ring ()) is arranged lying on the inside of the vessel wall and thereby at least its diameter has a taper that the ring (3) is within the taper carries an inwardly facing bead 3b and that the ring (3) is tapered at its Front end is rounded or is provided with a fold (3a). .) Expansion vessel according to claims 1 and 2, characterized et characterized, that the ring (3) is arranged in a vessel part (1) so that the folded end face against its bottom shows and that the one rests against the wall of the vessel Ring section protrudes over the abutting edge of the vessel part (1) and the vessel part (2) of the Centered expansion tank. 4-.) Expansion vessel according to claims 1-3, characterized in that that between the vessel part (1) on which the ring (3) is arranged. and the ring (3) the membrane (4) having a beaded edge (4a) is inserted and that after the insertion of the membrane (4) a cooperating with the bead (3b) of the ring (3) and the membrane (4) gas-tight fastening bead (1a) concentric to this in your Vessel part is arranged. 5.) Expansion vessel according to claim 1, characterized in that the ring (7) rests against the outside of the vessel wall and the joint between the vessel parts (5 and 6) overlapping, is arranged that the vessel parts (5 and 6) in the area of the Ring (7) has a taper of its diameter from the thickness of the wall of the ring (7) and that the vessel parts (5 and 6) at their ends facing one another wear at least one inward-facing fold. 6.) Expansion vessel according to claims 1 and 5, characterized in that that the vessel parts (5 and 6) at their mutually facing ends two inwards or wear folded edges directed towards the bottom of the respective vessel part (5 and 6) and that these folds are formed so that the first fold is less than 900 and the sum of the first and second folds preferably 1800 or more amounts to. 7.) Expansion vessel according to claims 1, 5 and 6, characterized in that the beaded edge (8a) of the membrane (8) -between the ring (?) and the folds both vessel parts (5 and 6) is clamped gas-tight.