DE2233876A1 - FIRE EXTINGUISHER - Google Patents

Description

my reference: 0519 Pt

GRAVIHER (COLWBROOk) LIMITED

Sword Works, Soutiifield Road, London, ¥ .4. (England)

Fire extinguisher

The invention relates to a system of fire extinguishers, but especially on automatically working fire extinguishers and fire extinguisher systems.

The invention thus relates to a fire extinguisher which has a normally closed outlet opening for the Owns fire extinguishing agents. First control means are provided, which in accordance with the onset of fire conditions in the vicinity of the fire extinguisher are effective such that the The emptying opening is released if it is in the Closed position. Control means are also provided. see which actuated according to an electrical signal and release the emptying opening of the device if it is in the closed position. After all, there are warning signs provided, which respond to the emptying of the fire extinguisher.

Also in accordance with the invention is a system of such i-your fire extinguishers are provided, which have at least two independent

Includes fire extinguishers, each of which has a container for holding the pressurized fire extinguishing agent and also has a normally closed discharge opening for the fire extinguishing agent. There are also means provided which on the incipient conditions of a fire or speak to B'euers in the vicinity of the fire extinguisher such that the emptying opening is released. Electrically responsive drainage means are also provided, which are also able to open the emptying opening. There are also signal means for displaying an electrical signal, in accordance with the release of the emptying opening this fire extinguisher. This system owns also an electrical circuit, which the electrical signal means and the electrically responsive Kntleurigsmibtel of the Connects device to one another, this electrical signal being generated by the signaling means of one of the fire extinguishing devices causes the electrically responsive .cntleermittel of every fire extinguisher release the emptying opening.

An exemplary embodiment of the fire extinguisher according to the invention and the system containing these devices is illustrated in more detail below with reference to the drawing. In this show in a purely schematic way:

1 is a general view of one of the automatic fire extinguishers according to the invention;

FIG. 2 is a view, partly in section, of the fire extinguisher according to FIG. 1,

B ^% ig * 3 a circuit diagram which is used in connection with the system that consists of the individual fire extinguishing devices according to FIGS. 1 and 2,

4 shows a somewhat modified embodiment of the. Fire extinguisher according to FIGS. 1 and Z ₁

2 0 9884/09 92 _; _

Fig. 5 is a partial view, partly in section, of one further embodiment of the fire extinguisher according to the invention,

FIG. 6 shows a bottom view of the arrangement according to FIG. 51

7 shows a partial section through the arrangement according to FIGS. 5 and 6, specifically along the line VII-VII in B'ig .. 6,

8 shows a section corresponding to FIG. 7 along the line VIII-VIlI in FIG. 6.

The one shown in Figs. 1 and 2, rechargeable Container 10 has a fire extinguishing agent which can be a chemical fire extinguishing agent such as bromochlorodifluoromethane. That The fire extinguisher is suspended via a console 14 on the roof 12 of the object to be protected. The suspension takes place via a weight-responsive switch 16. At its lower one At the end of the container 10 carries a fire extinguishing shower head When this shower head 18 is operated in the manner described below, it opens a valve 18 in the valve head 20, whereupon the pressurized fire extinguishing agent in the space to be protected leaks.

The weight-responsive switch 16 has a tubular member 20 which is screwed onto the console 14 with a tube 22 interposed. A contact base area, which consists of electrically insulating material and carries two electrical contacts 26, 28, is connected to member 20. At the upper part of the container 10, a plunger is attached ■ 30 which is slidably gelührt in the member 20 has ο This plunger 30 has an electrically conducting -teimeri i'.opi ^'y j ?. , and a compression spring 34 acts between the underside of this i.oples and an inwardly directed, ringförfftifien lü'ittGcij at the lower end of this tubular member 20. V) Xd i'eiierkour; Umte is dimensioned so that when the -I 0 with j * rjiii-rrl'i. '^ hiniltol. is full or sufficiently heavy

20 98 β Α / 09 92 -4-

WHEEL ORIGINAL

is to compress the spring and that way make a gap to create between the Kentakten 26, 28 and the plunger head 32. When the container 10 is at least partially empty, namely due to the material used or due to leaks, the force exerted by the spring 34 is in capable of lifting the plunger 30 upward so that the electrically conductive head 32 bridges the contacts 26 and 28. Wires or lines are connected to the contacts 26, 28 and are passed through the wall of the tube 22 and lead to the outside in an electrical cable 36.

The fire extinguishing shower head 18 has a bracket 40, at its lower end. Bracket head 42 is provided which has an internal thread. A set screw engages in this hole a and supports the lower end of a glass bulb 44. The upper end of this glass bulb 44 switches the valve in the Valve body 20 from. The set screw allows adjustment of the glass bulb 44 so that the valve is held closed.

The valve 44 is filled with a heat sensitive fluid filled up, which expands quickly when the temperature rises.

In addition, the bracket 40 supports an explosive trigger mechanism 46 from. This trigger mechanism 46 has a hollow chamber 50 which is closed by a releasable stopper 52 becomes and of which a narrow, hollow and tubular extension 54 goes out. The plunger 56 is in the bore of this Extension 54 is slidably guided, and when it is in an extreme position, it strikes against the glass bulb 44. The plunger head 56 is slidably guided in the hollow chamber 50 in which an explosive device 58 is stored. The plug 52 carries a electrically ignitable detonator or detonator, which is connected via the cable 60.

The bracket 40 also has a microswitch 61 which has a plunger which is under the action of a spring force and which rests against the glass bulb 44. the

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Contacts of the microswitch 61 are connected to the cable 62.

The container 10 holding the fire extinguishing agent carries a pressure-sensitive switch 64, which detects the pressure of the fire extinguishing agent located in the container and a Pair of contacts (not shown) closes when the pressure is applied as a result of using the device or because of any leaks falls off. The connections to these contacts of the pressure-sensitive switch 64 are established via the cable 66.

Although FIGS. 1 and 2 show only a single fire extinguisher, the space to be protected or the to protective object a multitude of similar fire extinguishers, which are stored everywhere in those places where the guarantee it is given that the fire extinguishing agent reaches all parts of this object to be protected. The fire extinguishers are connected to one another by electrical means to which the power source and the control circuit according to FIG. 3 are also connected are.

It should be assumed in FIG. 3, for example, that the system has a total of three fire extinguishers. 3 shows the cables 36, 62 and 66 which are connected to the corresponding weight-sensitive switches 16, the microswitch 61 and the pressure-sensitive switch 64 of the first fire extinguishing device system. These cables are connected to the input side of the unit 67. This excites a line 68 with a binary ¹ I ¹ when the cable 36 forms a bridge through the contacts of the weight-sensitive switch 16; a line 69 is ^{energized with a binary 1} I ¹ when the cable 62 forms a bridge through the contacts of the microswitch 61 and also energizes the line 70 with a binary ¹ I 1 when the cable 66 from the contacts of the pressure sensitive switch 64 forms a bridge. Lines 68, 69 and 70 are connected to a UWD switch 71, 72 and an OR switch 73 in the manner described below.

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In operation, the operation effects either the weight sensitive switch 16 or the pressure sensitive switch 64 the switching on or energization of the OR switch 73 and the latter in turn switches on a warning device 74. This indicates that there is a loss of fire extinguishing agent in the container has occurred, for example, through leaks or through consumption.

An abnormal rise in the ambient temperature partially causes the room to be protected by this fire extinguisher, that the fluid in the glass bulb 44 of the fire extinguisher expands in this area and causes the glass bulb to break. This causes the valve in the valve head 20 and the fire extinguishing agent in the container 10 to loosen is sprayed into the corresponding room via the fire extinguishing spray head 18. At the same time, the plunger of the microswitch 61 released by the broken glass bulb 44 and closes the contacts of the microswitch, so that the cable 62 bridges will. The escape of the fire extinguishing agent from the container 10 results in a rapid decrease in the weight of the container 10 and the plunger 32 in the weight sensitive switch 16 is therefore raised under the influence of the spring 34 until it electrically bridges the contacts 26, 28. At the same time, the escape of the fire extinguishing agent from the BeM-ter 10 leads to a Pressure drop in this container 10 so that the contacts of the switch 64 close.

The two AND switches 71 and 72 therefore provide (Fig. 3) Signals or pulses and excite or act on the outlet line 75 of an OR switch 76, being noted is that the line 75 is actually acted upon when either the weight-responsive switch 16 or the pressure-sensitive switch 64 has been set in action, provided that the microswitch 61 has also been operated.

The switching and control circuit according to Fig. 3 has similar elements as the other two fire extinguishing devices of the system, and these are provided with reference numbers in a similar way, from

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taken the distinguishing additions A and B.

The lines 75, 75Δ and 75B are connected to an OR switch 77 which monitors a signal or pulse generator unit 78 which feeds the cables 60 of the three fire extinguishers. Whenever one or more of the three outlet lines 75, 75A and 75B are energized, that is, _s which indicates that one of the fire extinguishers was in operation, the OR circuit 77 causes the unit 78 or the device to act on the three cables 66 . Therefore, the three ignition sets 46 of all three fire extinguishers are ignited and their plungers 56 shatter the corresponding glass bulbs 44, with the exception of the glass bulb of the first fire extinguisher, which has already been shattered by the rise in the local ambient temperature. In this way, the automatic operation of one of the fire extinguishers, depending on the increase in the local ambient temperature, brings about the commissioning of all other fire extinguishers used for this room or area, with the room to be protected being almost suddenly saturated with fire extinguishing agent.

The switching and control circuit of FIG. 3 can with a Detector 79 or display device, which is in the immediate vicinity of the fire extinguishers used for Establishes the necessary conditions for the outbreak of a fire and indicates. This detector 79 or display device is connected to all fire extinguishing devices via the OR circuit 77.

If desired, one of the switches.16 and in every fire extinguisher can be dispensed with. In this case! Ie the other switches alone monitor the warning device 74, and when using a single AND switch instead of two switches 71, 72 of this type, the other switches also monitor the outlet line 75 in combination with the microswitch 61 ^.;

. Jjie Figure 4 shows a somewhat modified ^"<; shape of the fire-extinguishing BrauGekopies nacht.äen 18 of the fire extinguishing device 1 and Figure *

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2, parts of the arrangement according to FIG. 4 which correspond to those according to FIGS. 1 and "2" being provided with the same reference numerals are. As shown in Fig. 4, the bracket 40 is not provided with the squib or the squib 46; instead of this carries the glass bulb 44 or the glass bulb at its lower end an electrically ignitable explosive device 80 or detonating charge electrical lines are connected to the cable 60.

The operation is generally the same as that already described in connection with FIGS. 1-3. When a fire extinguisher breaks the glass bulb 44 odes of the glass bulb is triggered due to an abnormal rise in temperature, the resulting, electrical signal, which is generated by the corresponding microswitch 61, in combination with the weight-sensitive Switch 16 and the pressure-sensitive switch 64 act on the cables 60 of all fire extinguishers, and the explosive devices 80 are triggered causing the glass bulbs 44 of the other fire extinguishers in this system to burst be brought so that - as before - all fire extinguishers are triggered.

According to a further modified embodiment, the explosive device 80 is removed according to FIG. 4; instead, the Glass bulb 44 is assigned an electrical heater, which is connected to cable 60 in the event that the system is actuated will. The heat generated by the heater breaks the glass bulb or the glass bulb 44.

The fire extinguishers according to FIGS. 1 and 2 can be designed so that their contents, for example about 15 kg Fire extinguishing agent, in about four seconds, with the remaining fire extinguishers in this system actuated and can be emptied within ten seconds.

FIGS. 5 to 8 show a further embodiment of the fire extinguisher according to the invention, the same parts with the arrangement according to FIGS. 1 and 2 with the same

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- ₉ -, 2233878

Reference numerals are denoted.

As already mentioned, the fire extinguisher according to FIGS. 5 to 8 is attached to a roof, namely via a weight responsive switch 16. The switch 16 is held in place on the bracket 14 via quick-release locks 90, the bracket 14 itself is connected to a base plate 91 and thus to the roof.

The switch 16 has an external, tubular member 20 in which the quick release locks 90 engage, in which the plunger 30 is slidably guided the container 10 is attached for the fire extinguishing agent. The plunger 30 is hollow and receives a plug 98 .; A microswitch 100, which extends into the hollow plunger piston 30, is connected to the base plate 91 of the fire extinguisher. When the fire extinguisher has been in operation and its contents, namely the fire extinguishing agent, has been emptied from the container has, the spring 34 can raise the plunger 30 into the position shown, and the plug 98 then strikes against the actuator 102 of the microswitch and closes its contacts.

A cover, which can be slipped onto the base plate 91, is designated by 104. This cover 104 has a Opening for the fire extinguisher shower head 18.

The fire extinguishing shower head 18 has a hollow, generally cylindrical member 110, the upper end of which is open inwardly towards the container 10 and which is welded to the lower part of the container .10. The inner bore of member 110 is threaded to receive a sleeve-shaped portion 112 which clamps an annular seal 114 in place. The lower end of this sleeve-shaped member 112 is sealed by a sealing membrane 116, _WEL: before is supported by the circular or annular support 118th

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The carrier 118 is held in place by three balls 120, 122 and 124 which are chamfered against the Position the edge of the carrier 118. The balls 120, 122 and 124 are arranged in the ends three-way radially outwardly directed bores, which are offset by 120 ° to each other. These 'holes extend through the wall of member 110.

Each of the bores 126, 128 and 130 has a Inner thread. The bore 126 carries a cylindrical ignition charge 134 or ignition charge via the screw thread, which of a releasable stopper 136 is closed, and also receives the piston 138, which abuts the ball 120. When the piston 138 assumes the position shown in Fig. 7 of the drawing, the piston is forced into a position in which he contacts the ball 120 with the carrier 116 brings. The piston 138 receives an ignition charge 140 and an electrically triggerable explosive device 142. This explosive device 142 is connected via electrical lines 144 to the cable 60, which is mounted in a circumferential slot 146 of the link 110 is. This slot 146 is closed by a protective cover 148

The radial bore 128 carries a glass bulb 150 or a glass bulb which is in place in a hollow cylinder 152 Stplle is held, the latter having an open end which can be closed by a releasable stopper 154. The inside end of the glass bulb 150 presses against the ball 122 and keeps it in contact with the carrier 118. The glass bulb 150 or the glass bulb is similar to the glass bulb 44 of the fire extinguisher according to FIG. 1 and receives a heat-sensitive fluid.

The radial bore 130 (FIG. 8) receives a plunger 160 in a hollow cylinder 162. This hollow cylinder 162 will closed by a releasable plug 164} with a spring 165 brings this plunger 160 into contact with the ball 12 4 and presses it against the carrier 118. The plunger 160 has a sleeve-shaped part 166 against which a bolt 168 of a microswitch 170 applies, which on a shoulder 172

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2233875

of the cylinder 162 is mounted. The switches of the microswitch 170 are in communication with the cable 62, which is in a slot 146 is housed.

The lower end of the link 110 is partially closed by an apertured disk 180 which is held in place by an apertured dome-like portion 182.

As can be seen from Fig. 5, the cables 36 and 66 in connection with an end block 182 which is connected to the circle according to FIG. 3, together with the cable 62. The Cable 60 is via the same end block with primer 134 in connection.

In accordance with the arrangement of FIGS. 1 and 2, the _r equipped to be protected room or area having a plurality of fire extinguishers as they are in Figs. 5 to 8, and the cables 66 and 68 are connected to a Steuefkreis, the has the shape of that of FIG.

During operation, the incipient conditions for a fire or a fire cause the local ambient temperature to rise. This causes the glass bulb 150 or the glass bulb of the fire extinguisher to break in the relevant area. Thereby, the ball 122 is released, so dissolved, the associated reduction of the contact force of the member 118 sufficient to reduce the .- ■ sealing membrane to solve the 116th The fire extinguishing agent in the container 10, 10 is therefore emptied. ;

If the member 118 of the fire extinguisher in the front ■ The manner described standing is released, that is, released and thus sinks, there is the ball 124 (Fig. 8) of the fire extinguisher free, and the plunger 160 can in this way ■ in the radial direction into the interior of the fire extinguishing shower head 18 and move the microswitch 170 in this way.

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_ ₁₂ _ 2233H76

make. The latter bridges the cable 62.

As mentioned above, the emptying of the fire extinguishing agent from the container causes the actuation of the weight sensitive or to a weight responsive switch 16 and the pressure switch 64 (Fig. 5).

In the same manner and manner described above excites the switching and control circuit according to Fig. 3 the Kabel.60 all fire extinguishers. This has triggered all of the primers 142 in the trigger mechanisms 134 of the ignition of all fire extinguishers as a result, as a result of which the piston 13B breaks and the balls 120 are released, that is to say released v / ground. The limbs 118 of the other fire extinguishers therefore lower themselves and release the sealing membrane. 116 free, so that the other fire extinguishers also empty the fire extinguishing agent.

As with the fire extinguishers according to FIGS. 1 and 2, the fire extinguisher according to FIGS. 5 to 8 can be changed by one or the other of the switches 16 and 64 is simply omitted, which inevitably results in a corresponding change in the switching or control circuit.

The fire extinguishing systems described above are advantageous in that they are essentially simultaneous ! Allow the fire extinguishing agent to be emptied from the appropriate containers using a variety of different Points and locations of the room or area to be protected, but only electrical connections between them make different points or places necessary. Pipelines that go out from a central collecting tank and lead to every distribution point can be avoided in this way.

- patent claims -

20988A / 0992

Claims (1)

PATBIiTAHSP R C C HB 2 2 3 ο ο / b 1.! Fire extinguisher, with a normally closed Emptying opening for the fire extinguishing agent, and one Control device, which according to the conditions necessary for a fire to break out in the vicinity of the Fire extinguisher becomes effective and releases the closed emptying opening, characterized in that that a second control device (46,80, 13B) is provided, which according to a electrical signal is effective and the closed emptying opening (20, 110) releases, and that a electrical signaling device (16, 61, 64, 170) is provided, which, on the emptying of the fire extinguishing agent Container responds. 2. Apparatus according to claim 1, characterized that the first control device is a thermosensitive device such as a frangible one Glass bulb (44, 150) or an a ^ laskiben which has a contains fluid that expands when heated, and that this " Glass bulb (44, 150) relative to the opening (20, 110) in the immediate vicinity thereof is such that it closes the opening (20, 110) keeps closed until the glass bulb (44, 150) or the glass bulb due to the thermal expansion of this fluid breaks. 3. Apparatus according to claim 1 or 2, characterized in that the second control device is an electrical one contains ignitable, actuatable by the explosion device (46, 80, 138) for releasing the emptying opening (20, 110), when an electrical ignition occurs. 4. Device according to claim 2, characterized in that that the second control device is an electrically heated. Contains device which is located near the Glass bulb (44, 150) lies and this breaks in the event of electrical excitation. 5. Apparatus according to claim 2, characterized 209884/0992 -A2 - records that the second control device is an electrical has an ignitable device (46, 80) actuated by the explosion, which is in the immediate vicinity of the glass bulb (44) or the glass bulb lies and in the event of electrical ignition this glass bulb (44) breaks. 6. Device according to one of the preceding claims, d a d u r c h characterized in that the electrical signal device has an electrical switch (150) which is arranged to operate when the emptying opening is open is operated. 7. Device according to one of claims 2 to 5, characterized in that the electrical signal device dai3 an electrical switch (61) with a switching element which is in contact with the glass bulb (44) is brought such that the switch (61) in the case of the Breaking the glass bulb (44) is actuated. 8. Apparatus according to claim 1 to 5, characterized in that the electrical signal device dai3 one electrical switch (16), which in accordance with the change in the weight of the fire extinguisher as a result the escape of the fire extinguishing agent is actuated. 9. Device according to one of claims 1 to 5, characterized characterized in that the electrical signal device comprises a pressure sensitive electrical switch (64), which responds to the existing pressure of the fire extinguishing agent, so that in the event of the pressure drop when the fire extinguishing agent escapes from the fire extinguishing container is operated. 10. Apparatus according to claim 6 to 9, characterized that the switches (170 or 01 and 16 or 64) are electrically connected so that an outlet signal or an outlet pulse is only generated when both switches (170 or 61 and 16 or 64) are operated. 209884/0992 - A 3 - T1. Device according to Claim 1, characterized that the emptying opening (110) is kept closed by a detachable, annular membrane '(116) is that a first and second retaining means (122, 120) is provided, which on the circumference of this membrane (116) with Are arranged distributed spaced such that the membrane (116) is held in place .wird that the first control device has a breakable glass bulb M50) or glass bulb, which is arranged so that it has the first link (122) and contains a heat-expandable i'luid that according to the determination of the fire conditions and the glass bulb (150) breaks in such a way that the first Member (122) is displaced in this way and that the second control device has a member (130), several one electrically ignitable ignition charge (14O) assigned and so is stored that the second retaining member (120) is set so long until the member (13S) by the detonation the ignition charge (140) breaks in accordance with this electrical signal and a displacement of the second retaining element (120) has the effect that the membrane (116) released and thus the emptying opening after the shift either the first or the second retaining member (122, 120) is released. 12. Apparatus according to claim 11, characterized in chn e t that a third retaining member (124) is provided, which is arranged on the circumference of the membrane (116) at one point which - measured on the circumference of the membrane (116) - from the first and the second member (122, 120) a distance possesses and is moved into such a position, from v / which it is displaced out after loosening the membrane (116), and that the electrical signal device one electrical switch (170) has which on such Displacement of this third link (124) responds. 13. Ger-Mt according to claim 11 or 12, characterized in that (InJi a circular support member (11 «'jj is intended for storage of the hcmbran (TTb), which 2 0 98 8VfOJg 92 - A 4 - on the circumference in a direction facing away from the membrane (116) is chamfered that the first and second members (122, 120) has a spherical shape and is loosely supported and protrudes from the ends of the corresponding bores (128, 126), which of the circular carrier (118) and the Membrane (116) are directed radially outward, so. that the chamfered edge is touched, that the support member (118) is held in a position in which it the membrane (116) supports against the pressure of the fire extinguishing agent that this glass bulb (150) in the radial direction this support member (118) is arranged and supported so that it chamfered the first spherical member (122) with the Holds the edge in contact until it breaks, and that this link has a tab (138) which radially closes the support member (118) and the membrane (116) is arranged such that the second spherical member (120) against the beveled edge pressed, the explosive charge (14O) picked up and the second spherical member (120) is released. 14. Apparatus according to claim 12 and 13, characterized e i ch η e t that the third link is a third spherical one Member (124) which is loosely mounted in a further bore (130), from which it is in the radial direction protrudes to the support member (118) and the membrane (116) such that it contacts this beveled edge that a spring-loaded member (160) is provided is, which is slidably guided in the radial direction to the carrier member (118) and the membrane (116) and the third spherical member (124) presses against this chamfered edge, it being in a radial direction inward of the third Member is pushed when the support member (118) is displaced, and that the electrical switch (170) is mounted so that it is actuated by the radial inward movement of the member (160) under the action of the spring. 15. Fire extinguishing system, consisting of at least two fire extinguishing devices according to the preceding claims. 1 to 14, d a - 209884/0992 characterized in that the electrical Signal device (16, 61, 6A-, 170) of each fire extinguisher via an electrical circuit to the second control device (46, 80, 138) of each other Fire extinguisher is electrically connected, in the case of electrical excitation this circuit to the electrical signal generated by the electrical signal device (16, 61, 64, 170) of each of the fire extinguishers responds, in accordance with the emptying of the fire extinguishing agent from this fire extinguisher, 'by the-second Control device (46, 80, 138) of each other of the fire extinguishers is operated. 16. System according to claim 15, characterized that a detector (79) or locking device is provided, which in accordance with the for a Fire required conditions in the general area of all fire extinguishers triggers an electrical signal, and that a circuit is provided, v / elcher as required of this electrical signal the second control device (46, 80, 138) of each of the fire extinguishers actuated « 17. System according to claim 15> or 16, characterized by a logic circuit which, depending on the operation, either of the responsive to a weight Switch (16) or the pressure-sensitive switch (64) of each of the fire extinguishers generates a warning signal. 209.884 / 0992 Blank page