DE29603951U1 - Connecting device - Google Patents

Description

Karl Dungs GmbH & Co.
Siemensstrasse .6-10

D-73660 Urbach

Representative

Kohler Schmid + Partner
Patent attorneys
Ruppmannstrasse 27

D-70565 Stuttgart

Connection device

The invention relates to a connection device for a fitting body through which a fluid flows to a pipeline, in particular for safety solenoid valves of a gas fitting, wherein the fitting body has an inflow opening and an outflow opening for the fluid.

Such connection devices are already known, for example, for connecting safety solenoid valves on the gas inlet side of gas heat generators.

Gas heat generators are connected on the gas side to the gas connection (gas meter, pressure reduction unit, etc.) by a series connection of individual fittings specified in standards. This route, known as the gas line for gas applications, contains the gas filter as well as the components gas pressure regulator, first and second safety shut-off valve, which are usually electrically controlled solenoid valves. Gas pressure regulators are usually spring-loaded, i.e. adjustable to the desired output pressure using an adjustment spring, as described and illustrated in the data sheet "Pressure regulator type FRS" from Karl Dungs GmbH & Co., Schorndorf, February 1993. Single-stage safety solenoid valves that can be combined with such a controller are described, for example, in the data sheet "Safety solenoid valves, single-stage, type MV/5, MVD/5, MVDLE/5" from Karl Dungs GmbH & Co. from November 1993.

The individual components of such a gas line are screwed together as individual fittings using threaded connections in a gas-tight manner by an installer on site. When using multiple control devices, in which the elements of the gas line are combined in one fitting, the piping effort is reduced to connecting the inlet and outlet sides of the multiple control device. To make piping easier on site, the threaded connection is not in the fitting housing itself, but in two connection flanges. The fitting can be installed between the two flanges even after the gas connection line has been completed.

used or installed. The piping is designed in such a way that the position of the gas line elements or the multiple control devices is in the pipe axis of the gas line.

Although these connection flanges for the multiple control devices already offer advantages for the installation and replacement of the gas valve during servicing, the disadvantage is that all forces occurring in the pipeline are also directed via the valve. However, particularly when the ends of a pipeline leading into and out of the multiple control device are offset, it is hardly possible to install the valve between the two flanges without straining the pipeline. The valve must therefore be designed to be so stable that the straining forces that occur can also be safely directed via the valve.

The present invention is therefore based on the object of developing a connection device of the type mentioned at the outset in such a way that tension forces occurring in the pipeline are kept away from the fitting and that the fitting can be easily installed and removed from a gas line.

This object is achieved according to the invention in that the inflow opening and the outflow opening are provided in the same side wall (connection side) of the fitting body, and that an adapter can be arranged on this connection side, which diverts the fluid flow, which flows from the adapter into the inflow opening of the fitting body, from a plane running parallel to the connection side through the adapter at right angles in the direction of the inflow opening, and which diverts the fluid flow, which flows from the outflow opening of the

The water flows back into the adapter from the fitting body and is diverted at right angles into the plane.

The adapter device according to the invention therefore has the significant advantage that the fitting body is removed from the pipeline axis. A stable connection between the ends of the pipeline that absorbs tension forces is created by the adapter, which is connected to the two pipeline ends via threaded connections and fixes them in position relative to one another.

The fitting body can be attached to this adapter without any tension. This makes it particularly easy to install the pipeline on site without handling the fitting body and to ensure that forces from the pipeline are no longer transmitted via the fitting body. In addition, the fitting is installed, removed and replaced during servicing much easier. Furthermore, individual parts of the fitting body that previously had to be made of sturdy material such as metal, e.g. the outer casing, can now be made of plastic or other lighter materials, which significantly reduces the weight of the fitting body.

Another advantage of the connection device is that the valve body does not need to be involved in the required pressure test of the gas line after installation. The test pressures for the pure piping are not based on the small maximum operating pressures of e.g. 100 mbar that must be observed for the valve body, but can be between 500 and 1000 mbar, depending on the maximum operating pressure of the gas line's gas shortage protection device.

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If no pressure switch is fitted to the connection device, higher test pressures can also be used. After the fitting body has been installed, only the connection level to the fitting body needs to be checked for leaks using a foam or bubble-forming test liquid. This can prevent malfunctions in the fitting body caused by excessive test pressures.

In a first preferred embodiment, the two fluid flows running in the plane run at right angles to each other. The adapter device can then be used wherever the pipeline is deflected at right angles.

In a second, particularly preferred embodiment, the two fluid flows running in the plane run parallel to each other, so that the connecting device can be inserted between parallel pipe ends of a horizontal or vertical pipeline.

A particularly advantageous development of this embodiment is characterized in that the two fluid flows run parallel and offset to one another. Especially in the case of offset pipe ends of a pipeline, where particularly large tension forces could occur with previous connection connections, the connection device according to the invention leads to a stress-free connection of the fitting body to the pipeline.

The invention also includes an adapter for the connection device according to the invention, whereby the adapter for the inflow opening of the fitting body has an inlet opening that is open at right angles to the connection side and an inlet opening that is open in the direction of

has a deflection chamber open to the inflow opening of the fitting body, which connects the inlet opening to the inflow opening at a right angle, and wherein the adapter for the outflow opening of the fitting body has an outlet opening open at a right angle to the connection side and a deflection chamber open in the direction of the outflow opening of the fitting body, which connects the outlet opening to the outflow opening at a right angle.

By means of this adapter according to the invention, the fluid flows entering or exiting the adapter can be diverted at right angles from or into a plane running parallel to the connection side.

It is particularly preferred to insert a filter insert into a deflection chamber, preferably into the fluid inlet side. This filter insert, which consists for example of a filter fleece and a metal mesh supporting the filter fleece, serves to protect the safety functions of the valve body, such as a multiple control device.

In a preferred embodiment of the adapter, the deflection chambers are also open on the side wall opposite the connection side of the fitting body. This makes it possible to clean the deflection chamber from the outside and replace the filter insert without having to detach and remove the fitting body from the adapter. A further advantage is that the fitting body can be attached to an adapter installed in a pipeline either on one or the other of its open side walls. If necessary, a fitting body or another accessory can also be attached to both open side walls of the adapter. For example, a

The gas shortage (pressure) monitor required for a multiple control device can also be attached to the adapter, which has the advantage that it can remain permanently connected when the multiple control device is replaced. The same applies to a pressure monitor required in some countries to monitor the gas burner pressure at the adapter outlet.

In a particularly preferred development of this embodiment, the open side wall opposite the connection side of the fitting body can be closed with a cover. The fitting body is optionally attached to one of the open side walls of the adapter and the other side wall is closed with the cover, which thus swaps places depending on the attachment side of the fitting body.

A further embodiment of the adapter according to the invention is characterized in that the deflection chambers are each open almost over the entire width of the adapter. As a result, the position of an inlet or outlet opening of the fitting body is variable over the open width of the deflection chamber if only the inlet or outlet opening is connected to the corresponding deflection chamber.

In a further preferred embodiment, a partition wall of the adapter separating two deflection chambers closes one or more further openings of the fitting body located between the deflection chambers. The connection side of the fitting body to which the adapter is attached can therefore be completely open.

If, in a further embodiment, the inlet opening and the outlet opening of the adapter are provided with an outwardly

protruding connection flange, the installation of the adapter into a pipeline on site is simplified, since the threaded connection is not formed in the adapter itself, but in the two connection flanges.

In an advantageous further development of this embodiment, the connection flange is designed as an internal threaded socket with wrench flats. This connection flange makes it easier to screw the adapter onto the pipeline. The connection flange can also be held in front of the connection opening so that it can rotate and cannot be lost. The adapter can then be inserted and installed between the corresponding flanges of the pipe ends of the pipeline without the adapter itself having to be rotated to form the screw connection. The screw connection is made using only the connection flanges.

In a particularly preferred embodiment, the inlet opening and the outlet opening of the adapter are provided on opposite sides of the adapter, whereby the adapter can be installed in a horizontal or vertical pipeline.

In a preferred, first development, the inlet opening and the outlet opening are offset parallel. This offset arrangement is always advantageous if the pipe ends to be connected are also offset.

In another preferred, second development, the inlet opening and the outlet opening are arranged coaxially to each other. This arrangement allows the installation of the adapter

in a linear gas line and in two coaxially opposite mounting positions.

A particularly preferred embodiment of this development is characterized by the fact that the adapter can be installed in the pipeline rotated by 180° around the common axis of the inlet opening and the outlet opening. This symmetry makes it possible to attach a fitting body to the adapter on either side of the gas line by installing the adapter in the gas line rotated accordingly. In this embodiment, the adapter only needs to have deflection chambers that are open on one side.

In a particularly preferred embodiment, the shape of the adapter is adapted to the shape of the fitting body, so that the fitting body and the adapter visually form a unit due to their form-fitting connection.

In a first aspect, the invention also includes a fitting body for the connection device according to the invention, wherein a side wall of the fitting body is omitted.

This omitted, i.e. missing, side wall, which forms the connection side of the valve body and is closed by the adapter, allows a simplified casting technique for producing the valve body and leads to a reduction in the weight of the valve body.

In a second aspect, the invention also includes a fitting body for the connection device according to the invention, wherein the inflow opening and the outflow opening of the fitting body extend to two opposite connection sides

·

These fluid openings in the fitting body, which are open on both connection sides, make it possible to quickly and easily adapt already known standard fittings, in which the inlet and outlet openings are on opposite sides of the fitting body, for adapter attachment. In already known standard fittings, it is hardly possible to omit a side wall without completely changing the design and the manufacturing process.

In a further development of this embodiment, a connection side of the fitting body can be closed, e.g. via a cover or other accessories.

In a very preferred embodiment of both aspects, the fluid-contacting components of the valve body, preferably all components except electrical or magnetic components, are made of plastic. Since the valve body is no longer simultaneously a load-bearing pipe element, it is possible for the first time to use a plastic housing for the valve body, in particular for a multiple control device. This only has to be designed for the low gas inlet pressure and the test pressures for the corresponding valve class.

A preferred embodiment is therefore characterized by the fact that a temperature safety shut-off valve is installed upstream of the fitting body on the fluid inlet side. This temperature safety valve is made entirely of metal and shuts off the gas supply to the fitting body when a defined trigger temperature is exceeded. The trigger temperature is set in such a way that it is always lower than the maximum permissible operating temperature for the plastic housing.

A further advantageous embodiment of the fitting body is characterized in that accessories such as pressure switches or other fitting bodies can be arranged on the side walls of the fitting body.

Further advantages of the invention emerge from the description and the drawing. Likewise, the features mentioned above and those listed below can be used individually or in combination in any desired way. The embodiment shown and described is not to be understood as an exhaustive list, but rather has an exemplary character for the description of the invention.

The invention is illustrated in the drawing and is explained in more detail using exemplary embodiments. They show:

Fig. la shows an exploded view of a first embodiment of the connection device according to the invention, which is installed between pipe ends of a gas pipeline with a parallel offset axis;

Fig. Ib shows an exploded view of a second embodiment of a connection device according to the invention, which is installed between coaxial pipe ends of a gas pipeline;

Fig. 2a shows a longitudinal cross section through a double safety valve designed according to the invention, which can be used as a valve body in the connection devices of Figs. la and 1b;

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Fig. 2b is a side view of an adapter according to the invention for the double safety valve of Fig. 2a, which can be used in the connection device shown in Fig. la ;

Fig. 2c shows a longitudinal cross-section of the adapter of Fig. 2b in a cutting plane corresponding to Fig. 2a;

Fig. 3a shows a third embodiment of a connection device according to the invention with a fitting body attached on the left side; and

Fig. 3b shows a connection device corresponding to Fig. 3a with a fitting body attached on the right-hand side.

Fig. la shows a particularly advantageous embodiment of the connection device according to the invention, which consists of a fitting body 100, an adapter 110 and a closure cover 120. The connection device is installed between two pipe ends lila, 111b of a horizontal gas line, the two pipe ends lila, 111b running parallel to each other but offset.

The two pipe ends purple, 111b are screwed gas-tight to the cuboid adapter 110 via two connecting flanges 112a, 112b designed as internal threaded connectors with wrench flats, which are attached to opposite side surfaces 113a, 113b of the cuboid adapter 110. The two pipe ends purple, 111b are therefore already fixed in their position relative to one another by the adapter 110, so that any tension forces that may occur in the pipeline are transmitted to the adapter 110 via the pipe ends purple, 111b. The adapter 110 consists of

made of sufficiently stable material, especially metal, to absorb these tension forces.

Two opposite sides of the adapter 110, of which only the front side 114 is shown in Fig. 1a, serve as connection sides for the valve body 100 and the cover plate 120, respectively. The valve body 100 is thus completely removed from the pipeline axis, and the installation of the pipeline can be carried out on site without handling the valve body using the adapter 110 alone.

The connection flanges 112a, 112b simultaneously form two openings in the adapter 110, of which only one (115b) is shown and which each lead into a deflection chamber 116a, 116b in the adapter 110. The two deflection chambers 116a, 116b, which are separated from each other by a partition wall 117, are open to both connection sides (114).

The rear connection side (not shown) and thus the deflection chambers 116a, 116b of the adapter 110 that are open to this side are sealed gas-tight by the cover 120. The valve body 100 is attached to the front connection side 114 of the adapter. This valve body 100 is shown in the figure only as an example as a safety solenoid valve with a magnetic part 102, an electrical connection part 103 and a control part 104.

The fitting body 100 has an inflow and an outflow opening (not shown) on its side facing the connection side 114 of the adapter 100, which are each connected to a deflection chamber 116a, 116b of the adapter 110.

when the fitting body 100 is attached to the adapter 110.

If the gas enters the connection device, for example, via the pipe end lila, the gas from the line lila initially flows through the opening in the adapter 110 into the upper deflection chamber 116a, through which it enters the inflow opening (not shown) of the fitting body 100. In the case of a safety valve, the control variables are determined in the fitting body 100 and valves in the fitting body 100 are actuated accordingly. The gas enters the fitting body 100 through the outflow opening (not shown) into the lower deflection chamber 116b of the adapter 100, from which it exits via the outlet opening 115b from the adapter 110 into the pipe end 111b of the gas line. The fluid therefore flows into and out of the adapter 110 in a plane (E) running through the adapter 110.

The connection device 100, 110, 120 shown in Fig. 1a for a horizontal gas line makes it possible to attach the fitting body 100, e.g. a multiple control device, to both connection sides of the adapter 100. Therefore, the other connection side must be closed with the cover 120, which thus swaps places depending on the installation side of the fitting 100.

In Fig. Ib a connection device is shown which can be used advantageously for e.g. vertical gas lines. The adapter 210 has an upper and a lower deflection chamber 216a, 216b and is designed to be rotationally symmetrical with respect to a rotation of 180° around its longitudinal axis 217. The deflection chambers 216a, 216b are open on both connection sides and each have an opening in the adapter 210 with a

Gas line is connected, whereby only the lower opening 215b is shown in Fig. 1b. The openings lead into the two connecting flanges 212a, 212b, into which the pipe ends (not shown) of a gas line are screwed.

If the gas enters the upper deflection chamber 216a from above in accordance with the flow direction described in Fig. 1a, the gas enters the fitting body 100 from the upper deflection chamber 216a via an inflow opening (not shown) and then exits again from the latter via an outflow opening (not shown) and into the lower deflection chamber 216b. The gas then flows out of the lower deflection chamber 216b via the outlet opening 215b into the end of the pipe.

Since the adapter 210 is rotationally symmetrical with respect to its longitudinal axis 217 with respect to a rotation of 180°, the closure cover 120 can also be omitted in this case and the fitting body 100 can still be attached to both sides of the adapter 210. For this purpose, the rear connection side of the adapter 210 must be closed, i.e. the deflection chambers 216a, 216b are only open on one side, namely the connection side 214. If the adapter is then to be attached to the left of the adapter 210 rather than on the right, as shown in Fig. 1b, the adapter 210 must be rotated by 180° about its longitudinal axis 217 and the fitting body 100 can be attached to the left of the adapter 210.

If necessary, a fitting body or other accessory can be attached to both open side walls of the adapter.

However, the cover cap 120 can only be omitted if

Nevertheless, it is still possible to attach the adapter to both sides in the manner described if the adapter can also be installed in the pipeline rotated by 180° around its longitudinal axis. Since the adapter 110 shown in Fig. la for offset pipelines does not meet this condition, it is not possible to attach the fitting body 100 to both sides of an adapter 110 that is only open on one side.

When installing an adapter with only one open connection surface, the mounting side of the fitting body must be fixed at the time of installation so that the adapter can be installed in the pipe in the appropriate orientation. With an adapter that is open on both connection sides, it is possible to install the adapter firmly in a gas pipe and only make the decision at a later point in time as to which of the two connection sides of the adapter the fitting body should ultimately be installed on.

In Fig. 2a, a fitting body is shown as a double safety valve, which is specially designed for use in a connection device of Figs. la and lb. In the double safety valve, two independent valves I and II connected in series are housed in a common housing 1.

The housing 1 is divided into three openings. The gas inlet pressure is present in the inlet opening 2 and is closed off by a first valve seat 3. Between the first valve seat 3 and a second valve seat 4 there is an intermediate space 5, which is separated gas-tight from the inlet opening 2 and an outlet opening 6 in the longitudinal direction by walls 7a, 7b, except for the valve seat openings 8 and 9.

The inlet-side valve I consists of a first valve plate 10, a first closing spring 11 and a hollow armature 12. The hollow armature 12 is preferably mounted with play in the first valve plate 10 and sealed against the pressure difference with a seal (not shown). In the closed position, the first closing spring 11 only loads the first valve plate 10 directly.

The valve opening force is transmitted by a positive connection from the hollow armature 12 to the first valve plate 10, so that the first closing spring 11 is pre-tensioned to its maximum closing force when the valve I is opened.

The output-side valve II consists of a second valve plate 13, a second closing spring 14 and a lifting armature 15. The lifting armature 15 has a pull rod 16, which creates a positive, play-related connection to the second valve plate 13. The second closing spring 14 loads the second valve plate 13 and, when the second valve seat 4 is closed, ensures the required sealing force on the circumference of the valve seat edge.

The lifting armature 15 is guided longitudinally on a common axis a in the hollow armature 12 and is limited in its upward stroke by a non-magnetic locking disk (not shown) on the contact surface 18 of the hollow armature 12.

The magnetic drive 21 essentially consists of a coil 22, a magnet housing 23, a magnet sleeve lower part 24, a non-magnetic middle part 25 and a

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magnetic top 26.

When the solenoid coil is energized, the lifting armature 15 pulls the hollow armature 12 against the common pole system 20 and preloads both closing springs 11 and 14 to maximum closing force. This means that both valve seats 3 and 4 are opened simultaneously. After the magnet is switched off, the closing springs 11, 14 cause each actuator to close quickly at the same time.

Both valves I and II as well as a regulator 27 are arranged on a single longitudinal axis, namely the common axis a. This means that the length of the valve can be almost halved compared to previously known valves.

When the outlet valve II is in the closed position, the second valve plate 13 prevents the regulator 27 from opening. The actuator 28, 35 of the regulator 27 is held in the closed position. The closing spring force of the second valve plate 13 must overcome the spring force of a regulator setting spring 2 9. When the outlet valve II opens, the opening stroke of the regulator 27 also begins from its closed position.

The regulator valve plate 28 of the regulator 27 has an outside diameter that is smaller than the inside diameter of the valve seat bore in the housing. The difference in diameter or the gap width between the plate and the bore, together with the existing pressure drop, determines the smallest gas quantity that can still be regulated. The regulator valve plate 28 must not impair the function of the second valve plate 13, which in the case of gas safety valves particularly affects the closing speed.

For example, if the regulator 27 is fully open and the solenoid is switched off, the closing spring 14 of the outlet-side valve II must bring the regulator 27 into the closed position against the force of the regulator setting spring 29 and also against the counterpressure building up under the regulator working diaphragm 31.

The downward stroke of the regulator actuator creates a counterpressure in the chamber connected to the atmosphere via a small damping nozzle 30, which prevents the regulator valve and thus the output-side valve II from closing quickly. To prevent this and to ensure the required closing time of s 1 second, the working diaphragm 31 is released from the diaphragm plate 32 during the closing stroke of the regulator actuator, so that the resulting atmospheric overpressure in the chamber 33 presses the diaphragm against a spring-loaded counterplate 34. The counterplate 34 is mounted on the actuator rod 35 so that it can be moved longitudinally.

If the regulator valve plate 28 is in the closed position, a return spring 36 presses the counter plate 34 and the working diaphragm 31 back onto the diaphragm plate 32, which is firmly connected to the rod 35, in accordance with the pressure drop via the damping or breathing nozzle 30. At the next start, the working diaphragm 31 is again force-fitted to the diaphragm plate 32 and can start without any loss of control quality.

The regulator setting spring 29 for the regulator output pressure is installed horizontally in the embodiment shown and can be adjusted using an adjusting screw 38. A reversing lever 37 applies the spring force to the rod 35 of the actuator.

The left side in Fig. 2a, the connection side la of the double safety valve 1 is open and is sealed gas-tight by an adapter 50, e.g. via a molded seal, which is shown in Figs. 2b and 2c. The adapter 50 is designed for offset, parallel pipe ends, as shown in Fig. la. Therefore, its inlet opening 51a and its outlet opening 51b are arranged offset from each other accordingly. These openings 51a, 51b are each closed off on the outside by a connection flange 52a, 52b, into whose internal thread 53a, 53b the two pipe ends of a gas line can be screwed.

Fig. 2c shows a longitudinal section through the adapter 50. The adapter 50 has two deflection chambers 55a, 55b that are open on both end faces 54a, 54b and are separated from one another by an upper partition 56a and a lower partition 56b. The inlet opening 51a of the adapter 50 is connected to the upper deflection chamber 55a and the outlet opening 51b of the adapter 50 is connected to the lower deflection chamber 55b. The fluid flows into and out of the adapter 50 in the plane (E) shown in Fig. 2c.

The adapter 50 is permanently installed in a gas line. The open left side la of the double safety valve 1 is attached to the front side 54b of the adapter 50 in a gas-tight manner. The other front side 54a of the adapter 50 is sealed gas-tight with a cover according to the embodiments in Figs. la and 1b or with other accessories such as a pressure switch.

Since the axial width of the inlet opening 2 is due to the pressure drop of a fine filter to be provided in the

Double safety valve is designed larger than the axial width of the outlet opening 6, the lower deflection chamber 55b of the adapter 50 is also designed to be correspondingly smaller in the axial direction than the upper deflection chamber 55a.

The gas flows from the gas line via the inlet opening 51a of the adapter into the upper deflection chamber 55a, from there flows in the flow direction 40 into the inlet opening 2 of the double safety valve 1. From there, when the valve I of the double safety solenoid valve 1 is opened, it flows into the intermediate space 5, which is completely closed off from the outside by the upper and lower partition walls 56a, 56b of the adapter 50 and a cover on the front side 54a of the adapter 50. When the second valve II and the first valve I are open, the gas flows from this intermediate space 5 into the outlet opening 6 and from there in the flow direction 41 into the lower deflection chamber 55b of the adapter 50. From the outlet opening 51b of the adapter, it finally enters the gas line from the adapter 50.

Figs. 3a and 3b show another embodiment of a connection device, which is primarily intended for converted existing standard fittings.

On the housing of the schematically indicated multiple actuator 300, an inflow and outflow opening 318a, 318b is provided on both sides in the opposite connection sides 319a, 319b, which can be closed either on the left or right with a cover 320a, 320b or other accessories (not shown). The deflection chambers 316a, 316b of the adapter 310 are also open on both sides and are each connected at right angles to pipe ends 311a, 311b via screw connections 321a, 312b. In the plane (E), the fluid flows in

the adapter 310 in and out.

The adapter 310 itself is designed to be symmetrical by 180° around the longitudinal axis defined by the pipe axis, so that the fitting body 300 can be attached either to the left side (Fig. 3a) or to the right side (Fig. 3b) of the adapter 310.

The connection device shown in Figs. 3a and 3b only requires the closure covers 320a, 320b shown if there are no other advantages associated with them. For example, the closure cover 320a, 320b can also be used as an additional module for accessories of the gas line, for example as the lower part of one or two pressure switches.

Claims (23)

Protection claims 1. Connection device for a fitting body (1; 100; 300) through which a fluid flows to a pipeline, in particular for safety solenoid valves of a gas fitting, wherein the fitting body (1; 100; 300) has an inflow opening (2) and an outflow opening (6) for the fluid, characterized, that the inflow opening (2) and the outflow opening (6) are provided in the same side wall (connection side) (la) of the fitting body (1; 100; 3 00), and that an adapter (50; 110; 210; 310) can be arranged on this connection side (la), which adapter directs the fluid flow, which from the adapter {50; 110; 210; 310) flows into the inlet opening (2) of the fitting body (1; 100; 3 00), from a plane (E) running parallel to the connection side (la) through the adapter (50; 110; 210; 310) at right angles in the direction of the inlet opening (2), and which deflects the fluid flow, which flows back from the outlet opening (6) of the fitting body (1; 100; 300) into the adapter (50; 110; 210; 310), at right angles into the plane (E). 2. Connection device according to claim 1, characterized in that the two fluid flows running in the plane (E) run at right angles to each other. 3. Connecting device according to claim 1, characterized in that the two fluid flows running in the plane (E) run parallel to each other. 4. Connection device according to claim 3, characterized in that the two fluid flows run parallel and offset to one another. 5. Adapter for a connection device according to one of claims 1 to 4, characterized, that the adapter {50; 110/210; 310) for the inflow opening (2) of the valve body {1; 100; 300) has an inlet opening (51a) open at right angles to the connection side (la) and a deflection chamber (55a; 116a; 216a; 316a) open in the direction of the inflow opening (2) of the valve body {1; 100; 300) which connects the inlet opening (51a) to the inflow opening (2) at right angles, and that the adapter {50; 110; 210; 310) for the outflow opening {6) of the valve body (1; 100; 3 00) has an outlet opening {51b; 115b; open at right angles to the connection side (la). 215b) and a deflection chamber {55b; 116b; 216b; 316b) which is open in the direction of the outlet opening (6) of the fitting body (1; 100; 3 00) and which connects the outlet opening {51b; 115b; 215b) with the outlet opening {6) at right angles. 6. Adapter according to claim 5, characterized in that a filter insert can be inserted into a deflection chamber, preferably into the fluid inlet side (55a, 55b; 116a, 116b; 216a, 216b; 316a, 316b). 7. Adapter according to claim 5 or 6, characterized in that the deflection chambers (55a, 55b; 116a, 116b; 216a, 216b; 316a, 316b) are also provided on the connection side •♦ t f f *«« —3— (la) of the valve body {1; 100; 300) opposite side wall are open. 8. Adapter according to claim 7, characterized in that the open side wall opposite the connection side (la) of the fitting body (1; 100; 300) can be closed by a cover (120; 320a, 320b). 9. Adapter according to one of claims 5 to 8, characterized in that the deflection chambers (55a, 55b; 116a, 116b; 216a, 216b) are each open almost over the entire width of the adapter (50; 110; 210). 10. Adapter according to one of claims 5 to 9, characterized in that a partition wall (56a, 56b; 117) of the adapter (50; 110) separating two deflection chambers (54a, 54b; 116a, 116b; 216a, 216b) closes one or more further openings (5) of the fitting body (1) located between the deflection chambers (54a, 54b; 116a, 116b; 216a, 216b). 11. Adapter according to one of claims 5 to 10, characterized in that the inlet opening (51a) and the outlet opening (51b; 115b; 215b) of the adapter (50; 110; 310) are provided with an outwardly projecting connection flange (52a, 52b; 112a, 112b; 212a, 212b; 312a, 312b). 12. Adapter according to claim 11, characterized in that the connecting flange (52a, 52b; 112a, 112b; 212a, 212b; 312a, 312b) is designed as an internally threaded socket with wrench surfaces. 13. Adapter according to one of claims 5 to 12, characterized in that the inlet opening (51a) and the outlet opening (51b; 115b; 215b) are located at opposite the sides (113a, 113b) of the adapter (50; 110; 210; 310). 14. Adapter according to claim 13, characterized in that the inlet opening (51a) and the outlet opening (51b; 115b) are offset parallel. 15. Adapter according to claim 13, characterized in that the inlet opening and the outlet opening (215b) of the adapter (210) are arranged coaxially to one another. 16. Adapter according to claim 15, characterized in that the adapter (210) can be installed in the pipeline rotated by 180° about the common axis of the inlet opening and the outlet opening (215b) of the adapter (210). 17. Adapter according to one of claims 5 to 16, characterized in that the shape of the adapter (50; 110; 210; 310) is adapted to the shape of the fitting body (1; 100; 300). 18. Fitting body (1) for a connection device according to one of claims 1 to 4, characterized, that a side wall (la) of the fitting body (1) is omitted. 19. Fitting body (300) for a connection device according to one of claims 1 to 4 or 18, characterized, that the inflow opening (318a) and the outflow opening (318b) of the valve body (300) open towards two opposite connection sides (319a, 319b). 20. Fitting body according to claim 19, characterized in that a connection side (318a, 318b) of the fitting body (300) is closable. 21. Fitting body according to one of claims 18 to 20, characterized in that fluid-contacting components of the fitting body (1; 100; 300), preferably all components except electrical or magnetic components, are made of plastic. 22. Fitting body according to one of claims 18 to 21, characterized in that a temperature safety valve is connected upstream of the fitting body (1; 100; 300) on the fluid inlet side. 23. Fitting body according to one of claims 18 to 22, characterized in that accessories can be arranged on the side walls of the fitting body (1; 100; 300).