DE3114359A1 - Safety shut-down device - Google Patents

Abstract

A safety shut-down device (13) for gas installations, in which a membrane (29) holds a valve cone (26) in the open position by means of a connecting rod (32, 33, 34) under the influence of the gas pressure. A pipe (40), in which a restrictor (41) is inserted, connects the gas line (4) to the pressure chamber (38) under the membrane (29). A release plate (14) leads into a box (15) where it is closed by a membrane (44). By means of an actuator button (48), the membrane (44) can be destroyed with a punch (45), the gas pressure in the pressure chamber (38) drops as a result, and the safety shut-down device (13) is triggered. <IMAGE>

Description

PATENTAN-WA-LJ .OfU-ING -._ KLAUS DuIiM KARLSRUHE: FQ.IX-M0frL-i? T-i5ASSE "ra ^ TELEPHONE 853355. APPROVED REPRESENTATIVE AT THE EUROPEAN PATENT OFFICE «->

R 3016/81

April 7, 1981

Johann Baptist Rombach GmbH & Co KG, Karlsruhe

7500 Karlsruhe 21
Andreas-Hofer-Strasse 4

Safety hold-off device

T5 The innovation relates to a safety shutdown device, for installation in the gas supply line of residential and industrial buildings behind the gas supply line final T-piece, with a spring-loaded rubber membrane, which by means of a linkage one on one

displaceable valve tappet seated under the action of a spring under the action keeps the gas pressure in the gas line in the open position, which protrudes from the head part of a housing, which forms the pressure space below the rubber membrane,

* ■ · * which is connected to the gas supply line by a pipe.

The innovation is used in the creation of new gas installations and it is just as suitable for

Retrofitting of existing gas installations. 30th

The known safety shutdown devices are in front of the gas supply line shortly after the wall duct or behind the shut-off valve in the residential building or. built in the industrial buildings and they have the task of

to interrupt the gas flow as soon as the gas pressure drops

assumes too high or too low a value; their reliable work is known.

The known gas installations - which include the safety shutdown devices - have the disadvantage that in the event of danger (e.g. if a fire has broken out in the building) it is often no longer possible, to get to the shut-off valve in the basement and to close it as a precaution to avoid damage to gas pipes to prevent gas leakage. Such a gas leak usually has catastrophic consequences.

The task of the innovation consists in the conception of a device with whose help the gas supply in the event of danger to a building can be interrupted from the outside.

A safety shutdown device is used to solve the problem of the type described at the outset and the object is achieved in that A throttle is arranged in the tube, and a trigger tube is attached to the pressure chamber, the end of which is a Membrane closes, which faces a sliding mandrel. Through this training the well-known Safety shut-off device for an emergency shut-off valve that can be operated remotely - for example by the fire brigade, which closes as soon as the diaphragm is pierced with the mandrel, and thereby the gas pressure in the Pressure chamber drops.

In one embodiment of the innovation, the head part is equipped with a thread for connection to the T-piece, in which a sum interacts with the valve cone Serving valve seat is provided. This embodiment of the innovation can easily be attached to the T-piece

·· - "" ■ '■ - ■' - ^: - 31.1 Λ 3 5 £ - / S-

and it is therefore particularly suitable for retrofitting existing gas installations.

The membrane and the mandrel are advantageous in one a discharge opening provided box arranged, the guides for the under the action of a compression spring has a standing mandrel, which has an actuationLiknopl who sits under a pane of glass.

The innovation is shown below using two exemplary embodiments explained in more detail with reference to the accompanying drawings. Show it:

Fig. 1 shows a gas installation in a residential building with a safety shutdown device

device, in a first embodiment, shown schematically;

Fig. 2 shows a safety shutdown device in a first embodiment, suitable

for installation in the gas installation according to Fig. X, in a cross section, in a simplified Depiction;

Fig. 3 shows a safety cut-off device

direction of Figure 2 belonging box, in a cross section, in a simplified representation;

4 shows a gas installation in a second

.Execution form, with a safety shuttering t device in a second embodiment, shown schematically;

5 shows a safety shutdown device in FIG

according to a second embodiment, provided for installation in the gas installation Fig = 4, in a simplified cross-section.

The gas installation shown in FIG Residential building 1 is from a lying under the street 2 gas supply line 3 with town gas or natural gas fed. The gas passes through a gas feed line 4 a gate valve 5, through a wall bushing 6 and through an insulating piece to a T-piece 8, with which closes the gas supply line 4 and whose horizontal leg 9 is closed by a plug 10 is. After removing this stopper 10, the entire gas supply line 4 up to the supply gas line 3 can be cleaned will.

A shut-off valve 12 is screwed to the vertical arm 11 of the T-piece 8, on which there is a safety shut-off Device 13 connects. From this safety shutdown device 13, a trigger tube 14 leads to a Box 15, which is let into the wall 16 of the residential building 1 from the outside ",

/ Oschalt to the S afety ^ - device 13, a pressure regulator 17 and subsequently connected to a bellows expansion joint 18 and from 19 carries a gas line to the housing shut-off valves 20 and from there through the gas meter 21 to aen consumers 22nd

The shown in Figure 2, first embodiment of a safety shutdown device 13 has a . Housing 23, in which a valve tappet 24 is slidably disposed under the action of a spring stands. A valve cone 26 is seated on the valve tappet 24,

31H359

which cooperates with a valve seat 27. A cover 28 is screwed to the housing 23, with which a rubber diaphragm 29 is attached, which carries a diaphragm plate 30 on which a compression spring 31 is supported. A tappet 32 arranged on the diaphragm plate 30 is connected to a pivot lever 33 which is pivotably mounted on one side and which is a two-armed rocker arm 34, which rests against a shoulder 35 of the valve tappet 24.

The gas coming from the T-piece 8 flows through accordingly the arrow 36 the valve seat 27 of the safety shutdown device 13.

The valve cone 26 protrudes from the head part 23 'of the one Pressure chamber 38 below the rubber membrane 29 forming housing 23 out, where it is flanged to the in one Housing part 39 attached valve seat 27 cooperates.

The pressure chamber 38 is through a short pipe 40 with the gas supply line 4 (namely via the shut-off valve 12 and the T-piece 8) is connected, and a throttle 41 is inserted into this pipe 40. The trigger tube is attached to the pressure chamber 38 14 attached, which leads to the box 15 (see FIG. 1).

The trigger tube 14 opens (see FIG. 3) in a pipe socket 42 of the box 15, which with two shoulders is provided. The other of these paragraphs 43 carries a membrane 44 - for example made of metal - which a Thorn 45 faces. This mandrel 45 is arranged displaceably in guides 46 of the box 15 and endures at its end opposite the tip 47 a mushroom-shaped actuating button 48. Between de.n

31U359

Guides 46 and the button 48 is a compression spring 49 inserted so that the mandrel 45 under the Einwir-. effect of this compression spring 49 is available.

The operating button 48 sits in an extension 50 of the box 15 and under a pane of glass 51. The box 15 is provided with a blow-out opening 52.

The function of the safety shutdown device 13 can be assumed to be known.

The safety cut-off device 13 described can be retrofitted by installing the throttle 41 in the pipe 40 and by attaching the trigger pipe 14 with the box 15 as if pressed in the case of a fire alarm, the mandrel 45 destroys the membrane 44 and the gas in the trigger tube 14 flows out through the blow-out opening 52. As a result, the pressure in the pressure chamber 38 falls, the diaphragm plate 30 moves under the action of the compression spring 31 and actuates the pivot lever 33 and the Ki-pp lever 34 _; whereupon the valve cone 26 presses onto the valve seat 27. The throttle 41 prevents more gas from flowing in from the gas supply line 4 than flowing out through the trigger tube 14.

The gas installation shown in FIG. 4 corresponds to that shown in FIG. 1 and described above except for the connection and the special design of the safety shutdown device 13 '. These Safety shutdown device 13 'is instead of the Stopper 10 (see FIG. 1) attached to the horizontal leg 9 * of the T-piece 8 ', as can be seen from FIG is.

3114353

The safety cut-off device 13 · is screwed to the leg 9 'of the T-piece 8 ^{1 with the head part 23 1 ′, which is equipped with a thread 53.} A circular valve seat 54 is inserted into this T-piece 8 'from the inside (screwed or pressed in), which rests against the end of the gas supply line 4 screwed ^{into the T-piece 8 1.} The valve cone 26 of the safety shut-off device 13 ′ works together with this valve seat 54. The throttle 41 is arranged in the pipe 40 ′, which connects the pressure chamber 38 with the gas supply line 4, and the trigger pipe 14 is in turn attached to the pressure chamber 38.

The gas coming from the gas supply line 4 flows through the T-piece 8 'in the direction of the arrow 55. The function of this The embodiment of the safety shutdown device 13 ′ corresponds to that described above in the event of danger Safety shutdown device 13. Retrofitting an existing gas installation is very easy, because the valve seat 54 from the residential building into the mounted T-piece 8 'and around the throttle 41 and the Box 15 supplemented safety shutdown device 13 'can easily be screwed to the T-piece 8 ·.

^ 40-

1 ■ 'R 3016/81

April 7, 1981

5 Summary of the reference numbers used

1 8 ¹ Residential buildings 2 9 · Street 3 Supply gas pipe 4th Gas supply line 5 " Gate valve 6th 13 ' Wall implementation 7th Insulating piece 8th, Tee 9, horizontal leg (of 8) 10 Plug 11 vertical arm (of 8) 12th Shut-off valve 13, Safety shutdown device 14th Trigger tube 15th crate 16 Wall 17th Pressure regulator 18th Bellows expansion joint 19th 26 « Gas pipe 20th 23 '' Apartment shut-off valve 21st Gas meter 22nd consumer 23 casing 24 Valve lift 3i 25th feather 26, Valve cone 23 ·, Headboard (of 23) 27 Valve seats 28 lid

- ii -

, 29 rubber membrane

30 membrane plates

₃₁ compression spring

32 tappets

33 swivel lever

34 rocker arms

35 shoulder

36 P.

₃₇ headboard (of 23)

33 print room (of 23)

39 housing part

40, 40 'tube

41 throttle

42 pipe socket

₄ 3 paragraph (of 42)

44 membrane

45 thorn

45 guides 47 tip (of 45) _{48 control} button

49 compression spring

50 expansion (of 15)

₅₁ pane of glass

5 2 exhaust port 53 thread (from 23 '')

54 valve seat

₅ 5 arrow

Claims (3)

31U359 R 3016/81 April 7, 1981 claims 1. Safety shutdown device, for installation in the gas supply line of residential buildings and industrial buildings behind the T-piece that closes the gas supply line, with a spring-loaded rubber membrane, which by means of a Linkage one seated on a displaceable valve tappet under the action of a spring Holds valve cone in the open position under the action of the gas pressure in the gas line, which 'comes out of the head part a housing protrudes, which forms the pressure space below the rubber diaphragm, which is connected to the through a tube Gas supply line is connected, characterized by g e, that a throttle (41) is arranged in the pipe (40, 40) and is connected to the pressure chamber (38) a trigger tube (14) is attached, the end of which closes a membrane (44), which is a displaceable mandrel (45) faces. 2. Safety shutdown device according to claim 1, characterized in that the Head part (23 ') with a thread. (53) for connection to the T-piece (8 ·) is equipped, in which a valve used to interact with the valve cone (26 ") tilsitz (54) is provided. 31U359 3. Safety shutdown device according to claim or 2, characterized in that that the membrane (44) and the mandrel (45) are arranged in a box (15) provided with a blow-out opening (52) which has guides (46) for the mandrel (45) under the action of a compression spring (49), which carries an operating button (48) which sits under a pane of glass (51).