CN114382971A

CN114382971A - Susceptor and gas extraction point with susceptor

Info

Publication number: CN114382971A
Application number: CN202111215758.3A
Authority: CN
Inventors: A·伦普; R·萨默尔
Original assignee: Draegerwerk AG and Co KGaA
Current assignee: Draegerwerk AG and Co KGaA
Priority date: 2020-10-20
Filing date: 2021-10-19
Publication date: 2022-04-22
Also published as: FR3115345A1; DE102020127598A1

Abstract

The invention relates to a susceptor and a gas extraction point with such a susceptor. The base has a first coupling structure for fastening at the wall, a base channel connectable with the gas supply, at least one second coupling structure for fastening a plug-in coupling piece configured to releasably lockingly receive the plug towards a gas flow position, and a gas base valve arranged at least partially in the base channel and opening a flow channel between the base channel and the plug channel as soon as the plug is in the gas flow position. The base channel is arranged at least partially in a base element having at least one part of the first coupling structure and in a sleeve element having at least one part of the second coupling structure, the base element and the sleeve element each having at least one metal and the base element being formed in one piece with the sleeve element or being connected to the sleeve element via a materially bonded connection.

Description

Susceptor and gas extraction point with susceptor

Technical Field

The invention relates to a susceptor (socket) for a gas extraction point (or station outlet, i.e. gasntnahmestelle) and a gas extraction point equipped with such a susceptor. The base has a first coupling structure for fastening to the wall, a base channel which can be connected to a gas supply, at least one second coupling structure for fastening a plug-in connection (Steckkupplung), and a gas base valve which is arranged at least partially in the base channel and, if required, opens a flow channel between the base channel and a plug arranged in the plug-in connection.

Background

Modern hospitals and laboratories usually have a gas storage and compressed air generator and a branched line network with a plurality of gas extraction points via which the medical gases or compressed air necessary for the different examinations and treatments are made available in the treatment rooms, operating rooms and patient rooms. Furthermore, such gas extraction points are not only provided in buildings, but also in mobile rescue units, in particular rescue containers or in rescue vehicles, and are usually also connected to a gas or compressed air reservoir.

It is also possible to provide a reduced underpressure relative to the ambient pressure at such a gas extraction point, for example so that a suction of the patient can be performed. In order to be able to connect the respectively necessary lines, instruments or medical devices to the gas and compressed air supply, a plug-in connection is provided at the gas extraction point, which makes a gas-tight, error-proof connection to the plug.

The gas extraction point extends directly in the wall, at the supply channel, in the lines of the gas supply and the compressed air supply, or is arranged at another device, to be precise not only in the building but also in the mobile unit, for example a vehicle.

A plug-in coupling of this type is known from DE 2623934 a 1. The plug can be inserted into the described plug connection in the gas flow position (or gas flow position) in order to establish a gas-tight connection between the gas or compressed air supply and the consumer. The plug-in coupling has a plug receptacle with a ball lock (sperrukgelverriegleling), by means of which the plug is secured in the gas flow position and secured against unintentional release and fixed to a wall-side-mounted base with a gas-based valve. The gas base valve has a latching pin which, during the transition into the gas flow position, is moved past the plug in such a way that a flow channel is opened in the gas base valve between the gas or compressed air supply and a plug channel arranged in the interior of the plug.

The base thus generally ensures a positionally fixed fastening of the gas extraction point and is the basis for the connection between the medical device and the gas or compressed air source but provides a reduced pressure relative to the ambient pressure, for example for suction.

In general, the base of the gas extraction point known hitherto is fixed at the wall and has in its interior a base channel in which a gas base valve is arranged. If the plug is pushed into a plug connection piece fixed to the base and the gas passage position is reached, the latching pin of the gas base valve is moved from the end side of the plug against the spring force and is held in this position, so that a flow channel is opened between the gas or compressed air supply and a plug channel arranged in the interior of the plug.

For releasably securing the plug-in coupling, known bases have suitable coupling structures. In order to be able to carry out work, in particular maintenance work, at the gas extraction point, a maintenance valve is provided in the known base, which after removal or deactivation of the gas base valve also ensures that at least little or no gas or compressed air escapes into the surroundings at the gas extraction point during the carrying out of the work. In this connection, for example, the Greggersen service valve "Forano" is known, which has a bolt (or locking pin, Scliessblozen) which is screwed into the base during service operation and by means of which a metal seal is established between the base and the bolt after removal of the usual sealing element.

A disadvantage of the solutions known from the prior art is that sometimes additional structural elements must be required and introduced into the base in order to be able to establish the necessary seal and at least prevent normal hospital operation. Furthermore, a reliable seal is often not guaranteed, so that it happens that medical gas or compressed air leaves at the gas extraction point during maintenance, which on the one hand can be a risk to personnel in the surrounding environment and on the other hand is an economic loss. In emergency situations, the sealing of the gas extraction point can often only be performed manually.

Disclosure of Invention

Starting from the base known from the prior art for gas or compressed gas extraction points, the object of the invention is to provide a base which ensures a reliable sealing of the gas extraction point from the surroundings not only during maintenance work but also in the event of a fire. The use of plastic components should therefore be avoided. At the same time, the base to be described and the components used should have a comparatively simple structural design and be economically sensible to produce. Furthermore, the base to be described is to be designed such that the assembly and disassembly of the plug-in connection can be carried out simply and reliably without additional elements which have to be fixed in the case of maintenance on or in the base in order to establish a seal. Furthermore, the plug-in coupling should be replaceable without thereby affecting the normal hospital operation in an impermissible manner.

The object described hereinbefore is achieved with a susceptor according to claim 1. Furthermore, a gas extraction point, which achieves the object on which the invention is based, is specified in claim 15. Advantageous embodiments of the invention are the subject matter of the dependent claims and are set forth in the following description in part with reference to the drawings.

The invention relates to a base for a gas or compressed air extraction point, comprising a first coupling structure for fastening to a wall, a base channel that can be connected to a gas supply, at least one second coupling structure for fastening a plug-in connection piece (which is designed to releasably lock receive a plug in a gas flow position in order to establish a gas-tight connection between the plug channel arranged in the interior of the plug and the base channel), and a gas base valve (which is arranged at least partially in the base channel and opens a flow channel between the base channel and the plug channel as soon as the plug is in the gas flow position). According to the invention, the base is improved in that the base channel is arranged at least partially in the base element (which has at least one part of the first coupling structure) and the sleeve element (which has at least one part of the second coupling structure), so that both the base element and the sleeve element are made of metal and the base element and the sleeve element are formed in one piece or the base element is connected to the sleeve element via a material-fit connection.

It is essential for the solution according to the invention that the base is embodied as a pure metal structural unit. Preferably, the gas-based seat valve also has only metal parts. According to the invention, the base thus has two functional elements which form the base structure of the base, namely on the one hand a base element via which the gas base can be fixed at the wall and on the other hand a preferably tube-shaped sleeve element which has a coupling structure for fixing the plug-in connection. The base passage and the gas base valve are disposed within these two elements. By virtue of the base element and the sleeve element being embodied in one piece or being connected to one another by a material-fit connection, the base is provided as a uniform, easily handled structural element and moreover ensures that the base channel between the inlet and the outlet is reliably sealed in different operating situations and even in the event of a fire.

In a particular embodiment of the invention, the material-fit connection is a soldered connection, wherein the material-fit connection preferably comprises silver, copper and/or zinc. Such a connection is particularly advantageous if the base element and the sleeve element consist of brass.

A gas-based seat valve with a locking pin is arranged in the seat, which locking pin is movable in the longitudinal direction of the seat channel in the installation position against a spring force from a closed position into an open position. A spring element, in particular a helical spring, is therefore preferably provided, by means of which a spring force acting in the closing direction of the locking bolt is generated.

According to a further embodiment, it is conceivable for the second coupling means to have a thread. According to this embodiment, a protective cap (schutzkappa) can be screwed on the thread during the transport or assembly operation.

In a particular development of the invention, it is provided that a protective element is fastened at the second coupling structure at least temporarily, which covers the outlet opening of the base channel and at least partially covers the second coupling structure. Such a protective element is embodied, for example, in the form of a plastic cap which is plugged or screwed (if the second coupling structure is embodied as a screw thread) onto the second coupling structure. Particularly preferably, the protective element is therefore embodied as a screw cap made of plastic.

According to another particular embodiment of the invention, a closure element is provided which is designed to place the base (if it is fitted at the wall and no plug-in connection is fixed to the base) in a sealed state. In this sealed state of the base, the locking element ensures that the base channel (which is connected to the gas or compressed air supply and in which a pressure which is increased or reduced with respect to the ambient pressure is present) is reliably sealed in a gas-tight manner with respect to the ambient environment. As a result of the closure element (which is in the sealed position in the sealed state), as soon as no plug-in connection is fixed at the second connection structure and/or the gas base valve does not close the outlet opening of the base, the escape of gas or compressed air from the base or the intake of air into the base is reliably prevented depending on whether an overpressure or underpressure is present in the base channel.

Preferably, the closure element rests at least partially against the sleeve element in the sealing position, the sleeve element having a suitable sealing surface for this purpose. It is also advantageous if the closure element has a valve disk (ventileller) which bears with its outer circumferential region directly against the annular sealing surface of the sleeve element. Alternatively, it is conceivable for the closure element to rest at least partially on the sealing surface of the base element in the closed position.

Furthermore, it is conceivable according to a particular development that the closure element is designed as a cap element and that in the closed position at least one region of the visor of the cap element is arranged on the sealing surface of the sleeve element. Preferably, the cap-shaped closing element is arranged in the base channel in such a way that the crown of the cap element is located on the side facing away from the pressure-loaded side of the base channel in the closed position. Here, the crown (i.e., the dome) of the cap element is remote from the wall to which the base is secured.

In a further special embodiment, the closing element is at least partially connected to a spring element in the open position (in which the closing element does not close the base channel), the spring element preferably being a spring element which acts with a spring force on the latching bolt of the gas base valve in the closing direction. In this connection, it is particularly advantageous if the closing element has a stop element, against which the spring element at least partially bears and is fastened at least in one direction.

According to a very particularly advantageous embodiment, it is provided that the closure element is designed and arranged in the base channel in such a way that the closure element, which is fastened to the wall and is connected to the base at the gas or compressed air supply, is acted upon in the open position (in which the closure element does not close the base channel) from two opposite sides with the increased pressure prevailing in the base channel. Preferably, the closing element is arranged spaced apart from the nearest boundary wall of the base channel and/or a recess, for example in the form of a groove, is present between the boundary wall and the closing element. It is also advantageous if the closure element is held and fastened in the open position by the same spring element, which exerts a spring force on the latching pin in the closing direction of the latching pin.

According to a further particular embodiment of the invention, the base for the gas extraction point has a plug connection which is fastened to the first coupling structure and serves to receive the plug in a gas flow position in which a gas-tight connection is present between a plug channel arranged in the interior of the plug and a base channel, wherein the plug connection has at least one locking element (which in the gas flow position engages at least partially in at least one latching structure of the plug positioned in the receiving space) and at least one unlocking unit (from which the locking element is guided out when the unlocking unit is actuated).

The invention further relates to a gas extraction point having a base, which is designed according to at least one of the embodiments described above.

Drawings

The invention is explained in more detail below with reference to the drawings according to a particular embodiment without limiting the general inventive concept. Wherein:

fig. 1 shows a cross-sectional view of a gas extraction point with a base constructed according to the invention, which is fastened to a wall, at which a plug-in connection is fastened,

FIG. 2 shows a sectional view of a gas extraction point with a base constructed according to the invention and fixed to a wall, without a plug connection and with a closure element in the open position, an

Fig. 3 shows a sectional view of a gas extraction point with a base constructed according to the invention and fixed to a wall, without a plug connection and with the closure element in the closed position.

Detailed Description

Fig. 1 shows a sectional view of a gas extraction point 15 with a base 5 which is fastened to a wall 16 via a first coupling structure 18, to which base a plug-in coupling 1 is fastened, which has a plug-in coupling receptacle 9 for receiving a plug for establishing a connection between a central gas supply and a medical device. The base 5 thus establishes an airtight connection between the plug-in connection 1 and a gas supply of a hospital, which provides medical gas or compressed air for treating a patient. The susceptor 5 has a susceptor passage 4 which is connected in a gas-tight manner to the gas supply line 2. Arranged within the base channel 4 is a gas base valve 13, which in the operating state shown in fig. 1 is in the closed position, so that the base channel 4 is hermetically sealed from the surroundings and no gas exits from the gas extraction point 15. The locking bolt 14 of the gas-based seat valve 13 is acted upon by a force in the closing direction by means of a spring element 17 and is held in this position as long as no plug is inserted into the plug receptacle 9.

Furthermore, the gas base 5 has a second coupling structure 19, which, according to the embodiment shown in fig. 1, is designed as an external thread onto which the plug-in connection 1 is screwed with the fastening structure 6, which is designed as an internal thread.

The gas base 5 has a base element 10 and a sleeve element 11 as important functional elements. At the base element 10, a first coupling structure 18 is provided, here in the form of a through-hole, via which the base element 10 and ultimately the entire base 5 can be fixed at the wall 16 at least indirectly. Furthermore, a second coupling structure 19 of the base 5, here in the form of an external thread, is arranged at the sleeve element 11, at which the plug coupling 1 is at least indirectly fixed. In the exemplary embodiment shown in fig. 1, the sleeve element 11 is tubular and has an external thread on its outer circumferential surface, onto which a screw sleeve is screwed and the plug-in coupling 1 is fixed to the sleeve element 11 by means of a screw connection.

It is essential to the invention that the base element 10 and the sleeve element 11 are connected to one another by means of a material-fit connection 20, which is established here by a welded connection. The reliable sealing of the base channel 4 arranged in the interior of the base 5 between the inlet 21 and the outlet 22 with respect to the surroundings is ensured by means of a welded connection. In addition, the base 5 is embodied in this way as a component which is produced entirely from metal (here from brass), which ensures a reliable gas or compressed air supply permanently and in different operating situations. Even in the event of a fire, at least the risk of damage to the base 5 and the associated risk of uncontrolled gas escape is minimized.

The plug-in connection 1 has a plug receptacle 9 into which a plug, not shown, can be moved toward the gas flow position and is fastened here by means of the locking unit 7. In the gas flow position, the plug is pressed with its end side against the latching bolt 14 of the gas base valve 13 in such a way that it is moved against the spring force acting on it in the direction of the wall 16 and thus opens a flow channel between the base channel 4 and the plug channel in the interior of the plug.

Furthermore, the plug-in connection 1 has an unlocking unit 12, which makes it possible to release the locking of the plug, so that the plug can be removed from the gas flow position and removed from the plug receptacle 9 without considerable effort.

Furthermore, a cap-shaped closure element 3 is arranged in the base channel 4, which closure element is held in its position against the outer wall of the base channel 4 by means of a spring element 17 (which exerts a spring force acting in the closing direction of the locking bolt 14).

If the plug-in coupling 1 is removed from the base 5 in the event of maintenance, the blocking pin 14 is no longer held in its position and can be removed from the base channel 4 together with the spring element 17 or the blocking pin 14 and the spring element 17 can be pulled out of the outlet 22 of the base 5 as a result of the pressure prevailing in the base channel 4. In this operating state, the cap-shaped closing element 3 is moved into a closed position, in which the outer circumferential region of the visor 23 of the cap-shaped closing element 3 rests against the sealing surface 24 of the sleeve element 11, as a result of the pressure prevailing in the base channel 4.

Pressure is exerted on the closing element by means of a slot-shaped recess 8 arranged between the closing element 3 and the wall of the base channel 4, which is additionally dragged along by the gas briefly flowing out of the outlet 22, so that the closing element 3 is moved in the direction of the outlet 22. The introduction of this movement can be supported in that the spring element 17 at least partially surrounds the crown 25 of the cap-shaped closing element 3 and rests against it and the closing element 3 is lifted at least at this time a little from the wall of the base channel 4, in which the spring element 17 and the locking bolt 14 move in the direction of the outlet 22. As soon as the closure element 3 rests against the sealing surface 24 of the sleeve element 11 in the closed position, the outflow of gas or compressed air from the outlet 22 of the base is prevented reliably, permanently and without the use of plastic components.

Fig. 2 shows a sectional view of a gas extraction point with a base 5 constructed according to the invention and fixed to a wall, without the plug-in connection 1 and with the closure element 3 in the open position. This operating state occurs during maintenance of the gas extraction point 15 immediately after the plug coupling 1 has been unscrewed from the second coupling structure 19 in the form of an external thread of the base 5. The locking bolt 14 and the spring element 17 of the gas-based seat valve 13 acting on it in the closing direction are at least partially also situated in the seat channel 4. In the operating position shown in fig. 2, the locking bolt 14 and the spring element 17 acting thereon in the closing direction are no longer held in the base channel 4 and are pressed out of the base channel 4 through the outlet 22 or can be removed at least easily therefrom as a result of the pressure and spring stress present in the base channel.

Fig. 3 shows a sectional view of a gas extraction point with a base 5 constructed according to the invention and fixed to a wall, in a sectional view, without a plug-in connection and with the closure element 3 in the closed position. It is clearly recognizable that the closure element 3 rests with its circumferential edge on the sealing surface 24 of the sleeve element 11. In this way, a reliable and durable sealing of the base channel 4 and thus of the gas extraction point with respect to the surroundings is ensured, since the sealing element is pressed evenly against the sealing surface 24 of the sleeve element 11 due to the pressure prevailing in the base channel 4.

List of reference numerals:

1 plug-in connection piece

2 plug

3 closure element

4 base channel

5 base

Fixing structure of 6-plug connecting piece

7 locking element

8 notches

9 plug receiving part

10 base element

11 casing element

12 unlocking unit

13 gas base valve

14 locking pin

15 gas extraction point

16 wall

17 spring element

18 coupling structure for fixing to a wall

19 coupling arrangement for securing a plug-in connection

20 material-fitting connection

21 inlet

22 outlet port

23 brim of hat

24 sealing surface

25 crown part.

Claims

1. A base (5) having a first coupling structure (18) for fixing at a wall (16), a base channel (4) connectable with a gas supply, at least one second coupling structure (19) for fixing a plug coupling (1) configured to releasably lockingly receive a plug towards a gas flow-through position in order to establish a gas-tight connection between a plug channel arranged in the interior of the plug and the base channel (4), and a gas base valve (13) which is arranged at least partially in the base channel (4) and opens a flow channel between the base channel (4) and the plug channel as soon as the plug is in the gas flow-through position,

characterized in that the base channel (4) is arranged at least partially in a base element (10) having at least one part of the first coupling structure (18) and in a sleeve element (11) having at least one part of the second coupling structure (19), the base element (10) and the sleeve element (11) each having at least one metal, and the base element (10) being formed integrally with the sleeve element (11) or being connected to the sleeve element (11) via a material-fit connection (20).

2. The base according to claim 1, characterized in that the material-fit connection (20) is embodied as a welded connection.

3. Susceptor according to claim 1 or 2, characterised in that the material-fit connection (20) has silver, copper and/or zinc.

4. The base according to claim 1 or 2, characterized in that at least one spring element (17) is provided, by means of which a spring force acting in the closing direction of the locking pin (14) of the gas base valve (13) is generated.

5. The base according to claim 1 or 2, characterized in that the second coupling structure (19) is threaded.

6. The base according to claim 1 or 2, characterized in that a protective element is fixed at the second coupling structure (19) at least temporarily, covering the outlet (22) of the base channel (4) and at least partially covering the second coupling structure (19).

7. The base of claim 6, wherein the protective element has a spiral cover.

8. The base according to claim 1 or 2, characterised in that a closure element (3) is provided which is set up to hermetically seal a base channel (4) which is connected to a gas supply and which is loaded with a pressure which is increased with respect to the pressure prevailing in the surroundings, in the fitted state in the closed position, as soon as no plug-in coupling (1) is fixed at the second coupling structure (19).

9. The base of claim 8, characterized in that the closure element (3) in the closed position at least partially abuts directly against the sleeve element (11).

10. The base according to claim 8, characterized in that the closure element (3) has a valve disk, which, in an outer circumferential region, bears against a sealing surface (24) of the sleeve element (11).

11. The base according to claim 8, characterized in that the closing element (3) is configured as a cap-shaped element, which in the region of its visor bears against the sleeve element (11) and whose crown is arranged laterally opposite the pressure-loaded side of the base channel.

12. The base of claim 8, characterized in that the closing element (3) is at least partially connected with a spring element (17) which loads the locking pin (14) of the gas base valve (13) with a spring force in the closing direction.

13. The base according to claim 8, characterised in that the closure element (3) is configured and arranged in the base channel (4) in such a way that the closure element (3) is loaded from two opposite sides with an elevated pressure prevailing in the base channel (4) in an operating position in which a plug-in coupling (1) is fixed at the second coupling structure (19) and the base channel (4) is connected with a gas supply and is loaded with an elevated pressure relative to the pressure prevailing in the surroundings.

14. Base according to claim 1 or 2, with a plug coupling (1) fixed at the second coupling structure (19) for receiving a plug towards a gas flow position in which a gas-tight connection exists between a plug channel arranged in the interior of the plug and the base channel (4), wherein the plug coupling (1) has at least one locking element (7) which engages at least partially in the gas flow position into at least one latching structure of the plug positioned in a plug receiving portion (9), and at least one unlocking unit (12) from which the locking element (7) is guided out upon actuation of the unlocking unit.

15. Gas extraction point (15) with a base (5) according to at least one of the preceding claims.