EP1523439B1 - Compressed air supply system for a compressed air respiratory device - Google Patents

Abstract

Compressed air supply system comprises a pressure reducer (5) connected to a compressed air bottle and pressure lines connected to high- and medium-pressure outlets and leading to a mouthpiece (11) and to warning and display devices and further connections. A one-piece combined high-/medium-pressure line (8) consisting of a respiratory air-guiding medium-pressure tube having a cross-section corresponding to the respiratory air requirement and a flexible high-pressure line arranged coaxially within the medium-pressure tube is axially rotatably connected via a rotating coupling (7) to the pressure reducer and in the front region of the apparatus to a distribution block (9) for the high- and medium-pressure air. The distribution block has a first medium-pressure connection (10) for the mouthpiece, a high-pressure connection (15') for a manometer (15), a combined high-/medium-pressure connection (16) for controlling an alarm whistle (17) with high pressure and its operation with medium pressure, a high-pressure quick-filling connection (14) and a second medium-pressure connection (13).

Description

The invention relates to a compressed air supply system for a Preßluftatemgerät with a connected to a compressed air cylinder Pressure reducer and at its high and medium pressure outputs connected pressure lines. Such a system is in Document FR 2 733 960.

In the known Preßluftatemgeräten is on a support plate by a strap and by the connection with a Pressure reducer attached to a compressed air cylinder. The pressure reducer has several outputs, of which compressed air lines for air with a high pressure corresponding to the cylinder pressure Pressure to a pressure gauge or a relaxed medium pressure too a lung machine connected to a respirator out. From the high pressure line or the medium pressure line branching pressure hoses serve as Hochdruckschnellfüllanschluß or as Mitteldruckzweitanschluß. To another connected to the pressure reducer pressure line is an acoustic Warning device connected. The individual pressure lines are firmly connected to the pressure reducer and the free end Connected devices.

This type of compressed air supply is disadvantageous, as the plurality of pressure lines when applying the compressed air respirator and obstructive during the deployment of rescue workers is. There is a risk of getting stuck and the hoses can get confused or twisted, so that the mobility of the device carrier is restricted. Damage to a high-pressure line continues until Close the compressed air cylinder valve lost a lot of air. The Handling a compressed air breathing apparatus with such a compressed air supply system also causes difficulties in this regard, as the connections for pressure gauges, Signal whistle, etc. not in the same place in the front area of the device carrier lie.

The invention is therefore based on the object, the compressed air supply system a compressed air respirator in such a way that the ease of use when creating and carrying and handling of the device is improved.

According to the invention, the object is achieved with a compressed air supply system solved according to the features of claim 1.

The basic idea of the invention lies in the arrangement of a one-piece combined high and medium pressure line, the the respective end axially rotatable in the pressure reducer and in a arranged in the front region of the equipment carrier distribution block with multiple outputs for high and medium pressure supplied air is involved. At the distribution block provided high or medium pressure outputs can with an automatic regulator, a manometer and an acoustic Warning device to be connected or as a second medium pressure port or used as Hochdruckschnellfüllanschluß.

In such a compressed air supply and distribution system All compressed air outputs and thus also those are applied These connected meters, warning devices and the like. To a and the same place in the field of vision and handling of the device carrier. The handling of the device is thus essential simplified. In addition, only a single combined high and medium pressure line connected to the pressure reducer. Thereby the use of the compressed air respirator is further facilitated. There is no more confusion and even the only one remaining compressed air line, in a simple way along a back strap can be performed is not in itself rotatable because they are axially rotatable via a rotary connection coupling is stored in the distribution block and in the pressure reducer. There the acoustic warning device connected to the distributor block Both high pressure air and medium pressure air for Is available, this may be in an advantageous manner with High pressure air controlled, but operated with medium pressure air so that the generation of a long-lasting acoustic Warning signal with sufficient sound strength is possible.

According to a further feature of the invention, the combined High / medium pressure line designed as a coaxial line, and Although in the form that inside a medium-pressure hose made of flexible material, for example helically wound and also arranged flexible high-pressure line is. In case of a breakage of the high-pressure line, it gets quickly outgoing compressed air not directly into the open, but in the medium pressure line secured by a pressure relief valve and can therefore still be breathed by the equipment wearer.

In a further embodiment of the invention, the rotary coupling, via the combined high / medium pressure line one end into the manifold block and the other end into the manifold Pressure reducer is axially rotatably connected, a medium pressure Hose connection spout and a gas-tight connected with this High pressure connection spout rotatable in the manifold block or the distributor housing of the pressure reducer are mounted and each with a medium-pressure channel or high-pressure channel in the distributor block / distributor housing keep in touch. In every Rotary position of the high / medium pressure line or the rotary connection coupling can relax compressed air in the medium pressure hose and high pressure air flow into the high pressure line or flow out of these in the manifold block.

The pressure in the high pressure line is between 200 and 300 bar, while the pressure in the medium pressure line about 4 to 10 bar is.

From the concrete embodiment described below a pressure supply and distribution system for a Preßluftatmer and the dependent claims will be more Features and advantageous developments of the invention.

Fig. 1

ein Tragegestell eines Preßluftatemgerätes mit den erforderlichen Druckluftverbindungs- und -verteilungsorganen;

Fig. 2

eine detaillierte Schnittansicht der Ausbildung einer gemeinsamen Hochdruck- und Mitteldruckleitung und deren drehbaren Anschlusses an einen Luftverteilerblock bzw. einen Druckminderer; und

Fig. 3

eine weitere Ausführungsform eines Kupplungselements zur drehbaren Einbindung der kombinierten Hoch-/Mitteldruckleitung in den Verteilerblock bzw. Druckminderer.

An embodiment of the invention will be explained in more detail with reference to the drawing. Show it:

Fig. 1

a support frame of a compressed air respirator with the required Druckluftverbindungs- and distribution organs;

Fig. 2

a detailed sectional view of the formation of a common high-pressure and medium-pressure line and the rotatable connection to an air distributor block or a pressure reducer; and

Fig. 3

a further embodiment of a coupling element for rotatably incorporating the combined high / medium pressure line in the manifold block or pressure reducer.

In the illustrated in Fig. 1 support plate 1 with two back straps 2 and a hip belt 3, with which the support plate 1 is fixed to the equipment carrier, as well as with a tension belt. 4 for mounting a compressed air cylinder (not shown) At the bottom of a pressure reducer 5 is attached. In the on the compressed air cylinder connected pressure reducer 5 is a Part of the high-pressure air to a medium pressure relaxed. From a distributor housing 6 of the pressure reducer and reach a rotatably mounted in this clutch 7 the medium pressure air at a pressure of 10 bar and the High-pressure air at a pressure of 300 bar via a one-piece flexible compressed air connection line, that is, one single combined 300 bar high / 10 bar medium pressure line 8, which is held on one of the two back straps 2, to a in the visual and handling area (front area) of the device carrier arranged distribution block 9. In the manifold block 9 are the supplied high pressure air and medium pressure air distributed, on a first medium pressure port 10 for a connected to an automatic regulator 11 medium pressure line 12, a second medium pressure port 13 and / or a high pressure quick fill port 14, a high pressure port 15 'for a pressure gauge 15 (or an electronic Measuring unit) and a high / medium pressure port 16 for a Warning device, that is, one controlled by the high pressure and operated by the medium pressure signal whistle 17th

By arranging only a single compressed air supply line in conjunction with one at the end in the front area the device carrier located distribution block 9, in all required high and medium pressure connections integrated are, the ease of use for the equipment carrier is essential improved, especially since the combined one-piece high and Medium pressure line 8 at their ends rotatable in the Distributor housing 6 of the pressure reducer 5 and the manifold block 9 is involved. That is, the compressed air supply line can not twist. The danger of getting caught or otherwise obstructing the device carrier through a variety of straps and connecting lines significantly reduced. The handling and use of the respirator is easy and safe, since the pressure gauge 15 and the whistle 17 on a common carrier (distribution block 9) in the immediate viewing and listening area of the device carrier are located.

As can be seen from Figures 2 and 3, there is the combined High / medium pressure line 8 from a through a flexible Elastomer hose formed 10 bar medium pressure hose 18 and a coaxially arranged in this 300 bar high-pressure line 19 made of high-strength material, such as a copper alloy or Teflon. The high pressure line 19 Here is a helical coiled tube with little Diameter and therefore highly elastic, so that the combined High / medium pressure line 8 as a whole is also flexible.

A significant advantage is that here as a coaxial line trained single high / medium pressure line axially rotatable arranged in the distributor housing 6 and the distributor block 9 can be. In the distributor housing 6 / manifold 9 are for this purpose in each case a first bearing cylinder 20 with a radially adjacent medium-pressure channel 21 and a of the bottom of the first bearing cylinder 20 outgoing second Bearing cylinder 22 with an axially opening into this high-pressure channel 23 trained. In the first bearing cylinder 20 is a medium-pressure hose connector sleeve 24 rotatably mounted, axially locked by a cotter pin and each with a sealing ring 26 to the outside and to the high pressure passage 23rd sealed off. In height of the medium pressure channel 21 are located in the medium-pressure hose connector sleeve 24 at the one Circumference circumferential annular groove 27 and a radial through hole 28. Thus, via the medium pressure channel 21 fed Compressed air via the annular groove 27 and the through hole 28 in the medium-pressure hose connector sleeve 24 and in reach the medium pressure hose 18 of the high / medium pressure line 8.

The medium-pressure hose 18 (elastomer hose) is by means of a compression sleeve 29 on the from the distributor housing 6 or Distributor block 9 outstanding part of the medium-pressure hose connector 24 attached. The high pressure connection on which is arranged within the medium-pressure hose 18 helical high pressure line 19 via a in the second bearing cylinder 22 and the medium-pressure hose connection spout 24 each via a sealing ring 30.31 sealed, rotatably mounted high-pressure connection spout 32. This stands for the transport of high pressure air and the Medium-pressure air between the distributor housing 6 of the pressure reducer 5 and the manifold block 9 on the front of the device carrier a flexible and axially rotatable compressed air connection line (combined high / medium pressure line 8) available, which also can not get over and thereby further improves the ease of use of the compressed air breathing apparatus. Another advantage of the combined high / medium pressure line Finally, 8 consists in that the inside High-pressure line 19 through the medium-pressure hose enclosing this 18 is protected. If the high pressure line breaks 19 the escaping air does not flow in immediately Free, but in the connected to the regulator 11 Medium pressure hose 18. The air can still through the Equipment carrier be respired and flows only in case of major leaks, secured by a pressure relief valve, into the open.

A variant for the axially rotatable integration the combined coaxial high / medium pressure line 8 in the Distributor housing 6 and the manifold block 9 is shown in Fig. 3rd played. In this case, the medium pressure Hose connection grommet 24 'throughout the upper section in the area the medium-pressure channel 21 has a reduced diameter on and the high-pressure connection spout 32 'is firmly in the medium-pressure hose connector grommet 24 'involved, so that in the area the first and second bearing cylinders 20 and 22 respectively only one sealing ring 28 'and 30' is needed.

LIST OF REFERENCE NUMBERS

1

support plate

2

back belt

3

hip belt

4

strap

5

pressure reducer

6

distributor housing

7

Rotary connection coupling

8th

Combined, one-piece high / medium pressure line (Coaxial cable)

9

distribution block

10

First medium pressure connection

11

regulator

12

Medium pressure line

13

Second medium pressure connection

14

Hocdruckschnellfüllanschluss

15

manometer

15 '

High pressure port

16

comb. High / medium pressure connection

17

whistle

20

First bearing cylinder

21

Medium pressure channel

22

Second bearing cylinder

23

High pressure passage

24, 24 '

Medium pressure Hose connection

25

cotter

26

sealing ring

27

ring groove

27 '

reduced diameter range

28, 28 '

Through Hole

29

compression sleeve

30, 30 '

sealing ring

31

sealing ring

32, 32 '

Hochdruckanschlusstülle

33, 33 '

centric bore

Claims (11)

1. A compressed air supply system for a compressed air breathing apparatus with a pressure reducer (5) connected to the compressed air bottle and pressure lines (8) connected to the high-pressure and medium-pressure outputs of said pressure reducer and to a lung machine (11) and other alarm and measuring devices (15, 17) and other devices (13, 14), characterized in that it comprises a combined single-piece high/medium-pressure line (8) consisting of a medium-pressure hose (18) containing respiratory air and having a cross section in accordance with the need for respiratory air, and a coaxial flexible high-pressure line (19) located inside said medium-pressure hose that is connected via a rotary coupling (7) to the pressure reducer (5) and a manifold block (9) for the supplied high and medium-pressure air located at the wearer's front so that it can rotate in axial direction.
2. The compressed air supply system according to claim 1, characterized in that the manifold block (9) comprises a first medium-pressure connection (10) for the lung machine (11), a high-pressure connection (15') for a pressure gauge (15), a combined high/medium-pressure connection (16) for controlling an alarm whistle (17) at high pressure and for operating it at medium pressure, a high-pressure fast-fill connection (14), and a second medium-pressure connection (13).
3. The compressed air supply system according to claims 1 or 2, characterized in that the flexible medium-pressure hose (18) consists of an elastomer and the flexible high-pressure line (19) consists of a spirally wound pipe made of a high-strength material.
4. The compressed air supply system according to claim 3, characterized in that the high-pressure line (19) consists of a copper alloy or a compression-resistant synthetic material.
5. The compressed air supply system according to claim 1, characterized

   in that the manifold body (6) of the pressure reducer (5) and the manifold block (9) form a first bearing cylinder (20) with a radially entering medium-pressure duct (21) and a second bearing cylinder (22) with an axially entering high-pressure duct (23) following the first in axial direction,

   in that the rotary coupling (7) consists of a medium-pressure connecting nozzle (24, 24') and a high-pressure connecting nozzle (32, 32') held inside said medium-pressure nozzle and sealed against it, and

   in that the medium-pressure connecting nozzle (24, 24') is pivoted in the first bearing cylinder (20) and the high-pressure connecting nozzle (32, 32') is sealed and pivoted in the second bearing cylinder (22), wherein

   the medium-pressure connecting nozzle (24) comprises a reduced diameter section (27) with a through hole (28, 28') for supplying medium-pressure air at the level of the medium-pressure duct (21), and

   the high-pressure connecting nozzle (32) has a central hole (33, 33') to receive the high-pressure line (19) for supplying high-pressure air.
6. The compressed air supply system according to claim 5, characterized in that the high-pressure connecting nozzle (32) is pivotably held in the medium-pressure connecting nozzle (24), in that one O-ring (30, 31) each is located inside that nozzle and in the second bearing cylinder und (22), and in that the reduced diameter section is designed as an annular groove (27) with O-rings (26) on top and underneath.
7. The compressed air supply system according to claim 5, characterized in that the high-pressure connecting nozzle (32') is firmly linked with the medium-pressure connecting nozzle (24') and in that one O-ring (30', 28') each is placed in the section of the second bearing cylinder (22) as well as below the reduced diameter section (27') of the medium-pressure connecting nozzle (24').
8. The compressed air supply system according to any one of claims 5 through 7, characterized in that the high-pressure line (19) is fastened in an axial hole of the high-pressure connecting nozzle (32, 32').
9. The compressed air supply system according to any one of claims 5 through 8, characterized in that the medium-pressure hose (18) is attached to the portion of the medium-pressure connecting nozzle (24, 24') that protrudes from the first bearing cylinder (20) using a press sleeve (29).
10. The compressed air supply system according to any one of claims 5 through 9, characterized in that the medium-pressure connecting nozzle (24, 24') is held in the manifold body (6) or the manifold block (9), respectively, by a linch pin (25).
11. The compressed air supply system according to any one of claims 5 through 10, characterized in that the pressure of the high-pressure air is in the range of about 200 to 300 bars and that the pressure of the medium-pressure air is in the range of about 4 to 10 bars.

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