DE3105406A1 - Conical self-sealing inner-pipe socket connection, and a centring device for double pipes (double-pipe systems) - Google Patents

Abstract

In heating, sanitary, cooling and process technology, the "two or double-pipe system" is predominantly used, with significant disadvantages, such as difficult and complex installation, large space requirement, a large number of attachments, large insulating surfaces, difficult branches on the same level and extensive mounting. No inner-pipe connecting pieces which are easy to install are known for double-pipe systems. These disadvantages are overcome according to the invention in that the "two-pipe system" is replaced by a double pipe. A self-sealing inner-pipe socket having a centre/depth stop incorporated (Item 5.2) is used to connect the double pipes. The inner-pipe socket is pressed onto the inner pipe with an additional force and seals said inner pipe, by deformation, within the conically machined surfaces (Item 5.1) of the inner-pipe socket. The outer pipe can then be connected and sealed by any known means. In double-pipe mouldings and connecting pieces, the inner-pipe socket can at the same time centre these fittings. In addition, loose/displaceable individual centring rings having at least three webs are used for centring the inner pipe. These webs at the same time act as a centre/depth stop for the outer pipes. <IMAGE>

Description

Description of the invention

Title: Conical self-sealing core pipe socket connection and centering device for double pipes (double pipe systems).

Field of application: The invention relates to a conical self-sealing Core pipe sleeves with a centering device for double pipes and the connection necessary double pipe fittings and connecting pieces and i-pipe parts. In particular suitable for use as a two-pipe system in heating technology or as trace heating in process engineering.

Purpose: In heating technology, two-pipe systems are required that the transport of media (e.g. water) from the producer (e.g. boiler) to the consumer (e.g. heating surfaces) and back to the producer. In process engineering you need double pipe systems z. B.

as trace heating that makes the medium to be transported flowable received so that the medium is fed through the pipelines for further processing can be.

State of the art: It is known that predominantly in heating technology the% white pipe system is used to supply a medium with as little loss as possible, in terms of quantity to be distributed in a coordinated and secure manner to the consumers (pre-run), then to be collected there and returned to the processing (return). In process engineering is known to use double pipes z. B. as trace heating.

Criticism of the state of the art: the t> ekaiiite branch pipe in the Up to now, heating technology has been designed as pipelines that are spatially separated from one another.

The time required to assemble these pipelines is correspondingly high. The same applies to the number of pipe supports and fixings required, as well as their fittings and connectors.

The space requirement of the two pipelines is large. resulting from the two total surfaces of the two pipelines, leads to - large unwanted radiation losses (e.g. heat losses) that, with a additional considerable expenditure on insulation measures must be reduced.

Branches on the same level require considerable additional effort and lead to new problems as a result of these measures (air or water bags, Skips etc.), which in turn are then provided with an additional tech. Effort and appropriate Costs need to be eliminated.

Double pipes in process engineering are used, as far as. known with unusually high effort, as a leak-proof, easy-to-install connection is not yet known.

Task: The invention has the task. the great effort of two-pipe assembly to be significantly reduced or excluded. The undisputed advantages of the two-pipe system should be preserved. The assembly of two-pipe and double-pipe systems should be essential be simplified.

Lösting: According to the invention, this object is achieved by the two-pipe system was replaced by double pipes, the one by conical self-sealing Kcrllpipe socket connections are assembled with a centering device. . the Let the sealing effect be achieved by t, <In ß ilail das zylin (lris (: ll (3 Drives core tube into the conical socket.

The pressing forces that occur in connection with the material roughness and the deformation that occurs, - take over the sealing of the core tube.

Further embodiment of the invention: To use any known type of connection, How to be able to perform weld-flange-solder-screw connection, the invention designed to the extent that the core and the jacket tube by means of displaceable Centering rings joined together. This results in a separation of the double pipe on all studs possible are the core tube remains axially movable.

the conical core pipe socket can easily be manufactured as a single piece will. It is worked into double pipe fittings and connectors. the conical core pipe socket can be used for cold connections (flange, screw or screw connection) of the tubular casing, with additional pinch seal at the depth / center stop be provided.

In a further embodiment, the conical core pipe socket has a center / depth stop. Since the core tube is axially movable, it is not necessarily due to a screw connection happens by means of a special tool in the core pipe socket up to the middle / depth stop driven in The design of the double pipe fittings and connectors is according to the invention solved by the fact that the conical core pipe socket with a depth stop and a fixed Centering device manufactures.

If necessary, the core tube can be provided with an additional insulating layer be equipped that worsens heat transfer.

The double pipes can be made of commercially available or custom-made, media-resistant materials are made.

The wall of the core tube can be made with much smaller wall thicknesses, than the jacket pipe, since there is ever iiacli use, only the differential pressure must withstand the forced circulation.

Achievable Advantages: The advantages associated with the invention are in particular to see that when using double pipes, with the matching Double shaped and connecting pieces, instead of a two-pipe system, the assembly effort is approx. 50% lower.

The effort for suspensions and fixings as well as wall and ceiling openings also decreases by almost 50 ° c.

Urit the same rate, inventory will be reduced and simplified.

Compared to this, the structural requirements of a double pipe system are reduced the% white pipe system. by approx. 30%.

The drilling surface and thus the radiating surface is also approx. 30% less than the total surface of an equivalent two-pipe system.

I) a the conversion of the core tube can be made much weaker can, one achieves a considerable material savings.

Connections, even those to be installed later, require one essential thing less effort than in the conventional two-pipe system.

At all connection points of pipe joints, as well as on Formiiiid Connecting pieces, the time and material input is reduced by approx. 50%.

Through targeted heat exchange between flow and return, maii reduce / exclude the undesirable "cold shock" in directly fired heat generators. D peral increase devices are unnecessary.

Unwanted% irculations, within a heat cycle, while @ end the breaks in operation are compensated for by temperature, between flow and return prevented. Circulation locks can therefore also be dispensed with. All The advantages of the two-pipe system are retained.

Description of an embodiment: Fig. 1 shows the circuit diagram a closed circuit.

I) the numbers entered therein (2 - 5, c - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13), the following detailed drawings identify the various double-form and connector options within a double pipe system. No more The connections shown are possible.

The necessary fittings and devices (such as pumps and valves, etc.) was omitted in the drawing.

Clause (1.1) represents the processing unit (e.g. boiler) Fig. (1.21) shows a consumer (e.g.

Radiator) with special double pipe connection on one side.

Point (1.22) shows a consumer with a two-pipe connection on one side. Point (1.23) represents a consumer with a two-pipe connection on both sides.

Fig. 2 shows a double tube section, consisting of: the core tube Clause (2.1) and the jacket pipe Clause (2.2).

On the core tube there are two centering rings shown in FIG. 3 drawn. which are mounted so that they can move axially.

Fig. 2, b The section (A - B) shows the Kermolii surface (F1). the least equal to the area of the jacket tube (F2).

3 shows a possible embodiment of the core tube centering and -bracket. This centering ring has the following essential parts: The slip-over ring no. (3.1) with at least three centering bars (3.2) The following graphic Representations of the double pipe fittings are with four webs that go with point (3.3) are designated.

Fig. 4 shows the special tool for driving the core ear and / or of the jacket pipe into the core pipe socket. This tool is also used for calibration the zii connecting pipes.

The tool essentially consists of a solid material into which axially, two conical Bingnuten (4.2) are incorporated and as additional parts the area itiff.

(4.1) and the groove stop section (4.4), the ring grooves must be deeper than (lie, one-row length = middle / depth stop, the core pipe socket, The driving process is described as follows: A double pipe should already be at "E" firmly monlieil. so his can no longer move to this side.

Somil is weden the flush-separated core nor the jacket tube, in Movable lengthways. The single core pipe socket (5) with the conical inner surfaces and the middle / depth stop section (5.2), as far as possible, on the core tube attached. The same is done on the other side of the core pipe socket, by inserting the core tube (2.1) of the double tube into the core tube socket see Fig. 4, a. The tool no.

(4) placed up to the groove stop point (4.4). By force (e.g. hammer blows) on the area zifl. (4.1) the I) opl) elrotir becomes in the direction Point (4.3) moved, t) is the core pipe point (2.1) at the middle / depth stop point. (5.2) meets. The core tube is connected leak-proof by this driving-in process. The remaining gap between the casing pipe parts can then be welded see Fig. 7. After installing the double pipe end or branch pieces the core tube is clamped so tightly that it can no longer be released from its clamped position Solve the situation and become leaky kaiiii By using the tool No. (4), was In the course of this work step, a calibration of the still free Dof) pel at the same time raw rendes made.

Fig. 5, b shows a single core tube socket (5) and a double ear socket Clause (6). The latter is made up of the following parts: core pipe socket item (5.4), four connecting webs Point

(3.3) and the jacket pipe socket item (6.1), shown here as a soldered socket.

All of the parts described above are made into a single unit.

In the case of threaded, flaiisch or screw connections, the core tube first . after making the casing pipe connection up to the middle / depth stop Clause (5.2) collected.

Fig. 6 shows a pants piece that at the beginning or end of a double pipe system can be used. The drawing shows the possibility of a soldered socket connection Clause (6.1) in combination with the threaded sockets Clause (7.1) Fig. 7 represents a finished Butt-weld-socket connection (description under Fig. 4).

Fig. 8 shows a double-pipe T-piece with a smooth outer wall and the same outlets on all sides. A one-sided or two-sided reduced ones are possible Exhaust.

9 shows double tube Beduzier cords.

Fig. 10 shows the flange connection of a double pipe. Illit one Double pipe - elbow - fitting. The fixed centering bars (3.3), which at the same time a. serve as a depth stop, allow the single core pipe socket item (5) through subsequent expansion of the core tube, from the free end, the core tube no. (2.1), press in to the point of deflection and connect tightly.

The drawing also shows a threaded flange (10.1) and a pre-welding flange section (10.2) and the necessary seals section (10.3) released.

Fig. 11 depicts a double pipe tee for. Two-ear connection.

Fig. 12 shows a double - bend - piece with thread connection no. (7.1).

13 shows a further possible embodiment ei ii <s i) <) I> 1> <'.! drohr - T - piece for two-pipe connection and ieduzieilen outlets.

Claims (4)

Patent claims socket for connecting core pipes in double pipes / double pipe systems, in particular for use in heating, sanitary, refrigeration and process engineering, thereby characterized in that the sleeve has a self-sealing conical inner surface and a Has depth stop. 2. Centering device for central fixation of the core tubes in double tubes / double tube systems, in particular for use in heating, sanitary, refrigeration and process engineering, thereby characterized in that the centering device has at least three webs. 3. Sleeve according to claim 1, characterized in that the sleeve both can be manufactured as a single piece, as well as in double pipe fittings and connectors can be incorporated. 4. centering device according to claim 2, ticicluich gtßkennzeicllllet, that the centering device can be manufactured as a single part, as well as in double tube form- and connectors can be incorporated.