DE1708087A1 - Valve device for sprinkler systems and control valve for such a valve device - Google Patents

Description

Valve device for sprinkler systems and control valve for such a valve device

The invention "relates to a valve vox direction for Sprinkler systems with a supply line for a pressure medium. It is the purpose of the invention to such To create Yentilvorrichtung that ensures a high degree of independence from the existing pressure and the effective inspection of the system also enables in those cases in which the dormant system with a gaseous medium is filled, and the liquid extinguishing agent is only introduced into the system when this enters puncture. This is achieved according to the invention in that the valve device consists of one Main valve and a double control valve with an intermediate chamber, which has a valve body with a with a control piston connected valve spindle contains that the main valve is opened by the supplied pressure medium and with one in a pressure chamber with size-O , rem cross-section than that of the main valve

• The piston is connected, and that the pressure chamber is connected to the intermediate chamber of the control valve in such a way that flow pressure chamber thereby connected to the pressure medium supply line will when the in the dormant ^ rinklar-plant hfrrachtnie, nuf the 1st control piston of the control valve

ORiQiNAL

tils acting pressure the control valve geechlosj « holds, and is brought into contact with the outside air when the valve is through. Pressure drop in the Sprinkler system is opened.

Such a valve device is exclusively dependent on pressure differences, which is to be understood in such a way that a possible pressure drop in the sprinkler system immediately causes the mentioned control piston to move, whereby the control valve becomes effective, and _Ä so that the pressure in the mentioned pressure chamber is released, so that the pressure medium supplied by the pressure source can now open the main valve and supply pressure medium to the entire sprinkler system. In this cycle, the valve device works regardless of whether there is liquid or air in the sprinkler system during the rest period. The function sequence when the system is checked is the same.

A preferred embodiment * w r valve device is characterized in that the control piston of w dual control valve is so coupled with an alarm valve that it remains closed when the control piston is acted upon by the pressure prevailing in the static sprinkler system pressure, and in

- »the pressure medium supply line with its open position ο

* ° connects to a pressure-sensitive alarm device. at

CD

This embodiment addresses because of the construction of the valve device ο the alarm independently of the pressure at respective ° *, wherein the Alarmgabt auiaehlitss Lich of the Druokuntersohieden controlled, di · occur in the moment in which the tin Sprinkler

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1708097

Sprinkler system in puncture occurs _e The alarm continues regardless of any fluctuations in pressure until it is switched off manually «

A special two-way design of the valve device is characterized in that the control valve and the alarm valve are arranged coaxially in such a way that a chamber connected to the pressure medium feed opening is located between the two valves. These measures serve the purpose of simplifying the mechanical structure of the entire valve device. Jt

To the alarm body check to put into action without the entire sprinkler system, according to the invention can in the connection zwischeS ^m A.larmventil and the alarm element is a TJmIeitungshahn be on,

which is connected to the pressure medium supply line, that it feeds the pressure medium directly to the alarm organ and blocks the connection to the alarm valve.

The invention also relates to a control valve for the specified valve device, such a control valve is used, as already explained, to control the Main mounting valve of the valve device and becomes acted upon by the pressure prevailing in the sprinkler system, so that when a sprinkler is opened occurring · pressure drop acts on the control valve, which · « thereby the main control valve opens so that di · Extinguishing liquid is fed from a pressure reservoir into the bprinkler system.

109809/0760

it

It has been found that in sprinkler systems provided with such a valve device, smaller and slower pressure fluctuations can occur when all sprinklers are closed. These pressure fluctuations can occur, for example, as a result of tea temperature fluctuations in the outside air. It is obvious that such small, slow pressure fluctuations must not cause the main actuation valve to open. It has already been proposed to use a control valve that is directly _{dependent on the absolute D 1} UCk in the sprinkler system. Such a valve can indeed be set up in such a way that the main control valve is not opened in the event of pressure fluctuations of limited extent, but in many cases it has not proven to be entirely satisfactory. The invention therefore has the purpose of creating such a control valve by means of which this disadvantage is eliminated, so that the valve only responds to rapid and relatively large pressure fluctuations, while smaller and slower fluctuations are compensated for. This is achieved according to the invention in that the valve spindle is attached to two diaphragms, one of which is located in the actuation chamber, while the other is outside the side of the intermediate chamber facing away from the actuation chamber, and that the last-mentioned diaphragm is a wall of a pressure chamber forms, which is connected to the actuating chamber via a throttle valve, which can be freely flowed through in the direction of the pressure chamber, but throttles the flow in the opposite direction.

In the case of a valve designed in this way, the valve spindle is supported by the valve spindle at both ends of the valve spindle

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1708057

prevailing equal pressure in its inoperative position held since the same pressure on the outer sides of "acts both membranes and small * pressure variations by means of the throttle valve are balanced, without moving the valve stem in the axial direction. Only venn. during the opening of a sprinkler in In the sprinkler system there is a considerable and sudden pressure drop, a rapid pressure drop also occurs in the actuation chamber, whereas the pressure in the pressure chamber is slow

sinks so that there is a ^

sets considerable Druckgeßlle. Through this pressure _"- the valve stem is difference immediately issued an axial movement, so that the valve body the Ventilumschaltet, and balanced the main actuation valve-holding in the locking position pressure and the main control valve are opened, after which the extinguishing liquid can flow system sprinklers in the.

If, according to the invention, the valve spindle has a check valve body which is designed with the double valve body ™ in such a way that the shut-off valve extends through "

Removing the valve spindle from the pressure chamber opens, before the double valve body opens the passage from the intermediate chamber to the outside air, and if from the on the side of the chamber diaphragm facing the intermediate chamber, a throttle duct is located on the part of the actuating chamber leads into the open, a particularly fast actuation of the valve is guaranteed, since the under Pressurized extinguishing liquid flows in through the shut-off valve as soon as Bioh opens this valve a little, and

109809/0710

thus on the side of the membrane located in the actuation chamber facing the intermediate chamber no overpressure is built up. The pressure of the extinguishing liquid then contributes to the rapid termination of the Axial displacement of the valve spindle and thus for complete switching, so that the pressure from the main control valve is relieved via the intermediate chamber. The extinguishing liquid can slowly pass through the named throttle channel seep out. By locking up the extinguishing liquid can therefore be returned directly to the valve spindle in its initial position, after which the system is ready to check the re-established sprinkler system in which all sprinklers are closed are.

According to the invention, both membranes can be plate-shaped and in the unloaded state be slightly curved in the direction of the mentioned pressure chamber, thereby ensuring an effective directional force for the valve spindle towards the normal rest position is.

A control valve of this type works in conjunction with a sprinkler system, which is in the sprinkler system itself Contains liquid and if the system is not in operation, it can cause difficulties in the event of a pressure drop in the sprinkler system to achieve an immediate movement of the valve stem because the liquid is not compressible. It can therefore according to the invention be two-fold, the pressure chamber as an expansion chamber to train or to combine with one.

109809/0750

The invention is explained in more detail below with reference to the drawing. Ss show

Pig. I made a vertical section through a preferred Embodiment of the valve device according to the invention, and

Pig. 2 schematiBch a with the valve device for a sprinkler system coupled according to the invention Control valve.

Pig. 1 shows a valve device with a supply line ™

1 for an extinguishing agent, preferably water. In this The feed line is a valve 2 with which a riser pipe that can be connected to the actual sprinkler system 3 is connected. The valve 2 sits on a valve spindle 4, which is on the other side of the riser pipe 3 is connected to a piston 5 located in a pressure chamber 6. The valve device further includes a control valve 7 with one in an intermediate chamber 9 I.

arranged valve body 8, the j with two valve seats

10 and 11 cooperate on opposite sides of the intermediate chamber 9. The valve body 8 is seated on a valve spindle 12, which at the bottom has a guide part 16 sealed against a sleeve 15 and _{is loaded by a P e} of 14 located in the sleeve, which presses the valve body 8 against the valve seat 10. The pressure force of the spring can be regulated with the help of a Sohrauoe 13a to change the position of a pressure shoe ^ 13.

109809/0750

The intermediate chamber 9 is connected to a pipeline 17 the pressure chamber 6 connected. Above the valve seat 10 is another chamber 18, which has a Pipeline 19 with the solvent feed line 1 in connection stands. At the upper end of the spindle 12 is a further valve body acting against a valve seat 21 20 is provided, which is located in an upper chamber

22 is located, which also contains a Kihrungskolben 23 seated on the valve spindle. Above the piston

23, the upper chamber 22 is connected to the riser pipe 3 via a pipeline 24. Under the piston a discharge line 25 is connected, which via a three-way valve 26 to a connection stub 27 of a pressure-sensitive alarm organ leads assigned line. The three-way valve 26 is also connected to the pipeline 19 and thus to the extinguishing agent feed line 1 leading line 28 connected.

A screw spindle is located on the upper side of the upper chamber 22 29 provided with a handle 30.

The riser pipe 3 has a leading to a three-way valve 32 Branch pipe 31. The three-way valve 32 is partly connected to a compressed air line 33 and partly to a vent connection connected. The branch pipe 31 is also connected to a branch line 35 which leads to a four-way valve which in turn leads to a pipeline 37 leading to the extinguishing agent supply line 1, an outlet port 38 as well as a pipe 39 is connected, which contains a throttle element 40 and a one-way valve 41, which is only in the direction of the four-way valve 36 away is passable.

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The control valve 7 has a with under the valve seat 11 An outlet line 43 verounden lower chamber 42. The pipe 25 has a serving as an outlet line Branch line 44 which contains a throttle element 45. . ·

The valve device according to the invention works like follows:

In the position shown in the drawing

of the four-way valve 36 are those with the riser 3 in j

Connected circuits from the loosening

medium supply line 1 connected circuits completely ge ^

separates. By turning the three-way valve 32, compressed air can be drawn from the compressed air supply line 33 into the riser pipe 3

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introduce which acts on the piston 23, so that the valve bodies 8 and 20 are pressed against the valve body 11 and 21, respectively. The preload of the spring is adjusted by means of the screw 13a in such a way that the spring force is only slightly smaller than the force acting against the piston 23 corresponding to the pressure in the ascending pipe 3. The extinguishing agent supplied from supply line 1 {

itself of the chamber is supplied leads 18 and enters the pressure chamber 6 where it acted on the piston 5 from that in the Zwischenkaamer 9 and through the conduit 17 such that the valve 2 is closed by the line nineteenth Since the piston 5 has a larger cross- section than the valve 2, the blocking is effective regardless of the absolute pressure of the extinguishing agent. The blocking is also independent of the pressure prevailing in the riser 3.

109809/0710

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However, if the pressure in the riser pipe falls, either because a sprinkler is connected to the sprinkler system is opened, or by turning the three-way valve 32 in brings a position in which this for the purpose of checking the system, the connection between the riser pipe 3 and the vent port 34 releases, the pressure on the piston 23 drops, so that the spring 14 the Valve spindle 12 pushes upwards. The valve body 8 is guided upwards so far that it is against pushes the valve seat 10, while at the same time a flow path from the pressure chamber 6 passes through it the pipeline 17 and the intermediate chamber 9 to the chamber 42 and thus to the outlet line 43 is opened. the Pressure chamber 6 is thus relieved, so that the pressure of the pressure medium in the pressure medium supply line 1 in the Is able to lift the piston 2 from its seat, after which the extinguishing agent enters the riser 3 and from this the sprinkler system is fed.

The spring holds regardless of any pressure fluctuations 14, the valve spindle 12 is still in the raised position, so that the valve 2 is also kept open. Simultaneously This means that pressure fluid, i.e. extinguishing fluid, is now passed through the valve body 20 from the chamber 18 conveyed into the upper chamber 22 and from this through the line 25 and the three-way valve 26 to the line 27, so that a pressure-sensitive Alarm device is applied and kept in action until the system is manually intervened.

S ₈ it can be seen without further ado that «an by lelaesung de« three-way cock · 26 in the on the newspaper

109809/07 (0

ORKÄNAL INSPECTED

th position and by turning the four-way valve 36 in such a way that it connects the line 37 with the line 39, can make this system work in the manner described above, but with the entire riser and the connected sprinkler system is constantly filled with extinguishing agent. The throttle valve 40 and the one-way cock 41 ensure that the pressure inside the riser is the same as in supply line 1, and that The same pressure is established above the piston 23 as in the chamber 18.

If the system is in operation for the purpose of checking or to extinguish a fire, and if the system is to be brought into the idle state, the valve spindle 12 must be pulled down by means of the screw spindle 21 confirmed by the handwheel 30. In addition, the four-way valve 36 must be set in such a way that the liquid in the riser pipe 3 and in the connected sprinkler system can run out through the nozzle 38. D _e r in line 25, the three-way valve 26 and into the line 27 fluid present can be given the opportunity, through the throttle valve f

45 and pipe 44 seep out. Once these processes have ended, you can set the valve 32 by turning it so that that the riser 3 is again supplied with compressed air, but initially the four-way valve 36 in the shown Position must be brought, so that the entire system dtr function mentioned at the beginning, i.e. for monitoring a any fire with air in the entire sprinkler system accordingly set iet. The three-way valve 26 can also be adjusted in such a way that it connects the connecting piece 27 with the line 28, so that the extinguishing agent can be used directly, ■ i.e. independently of the entire valve system, to

109809/0750

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direction, and one is thus able to check the alarm device without going into the system to intervene.

Fig. 2 shows an inlet port 101 for under pressure standing extinguishing liquid, which by means of a valve body 102 is blocked, through the axial displacement of which the inlet nozzle 101 is connected to the sprinkler system connected riser 103 is connected. The valve 102 is seated on a valve spindle 104 which a piston 105 arranged in a chamber 106 carries. The chamber is on a pipe 107 with a Intermediate chamber 108 in a control valve 109 according to the invention in connection. In the intermediate chamber 108 there is a valve body 110 fixedly arranged on the valve spindle 111. The valve spindle is switched on both ends supported by a membrane 112 or 113, which are connected to the spindle with the aid of a pair of clamping disks 114 and 115.

The valve spindle 111 also carries a valve body 116 which, in the position shown, has one under the membrane 112 located space 111 blocks against a lower chamber 118, which through a pipe 119 with the pipe socket 101 is in communication.

The riser pipe 103 is also through a pipeline 120 with an actuation chamber containing the membrane 112 121 connected, of which a pipe 122 leads through a throttle valve 123 to a pressure chamber 124, the a wall is formed by the membrane 113.

109809/0750

The throttle valve contains a valve body 126 which is loaded by a weak spring 125 and which is arranged in such a way that it closes the valve under the action of the pressure in the pressure chamber 124. The throttle valve 123 also contains a circulation channel 127, 128 with a throttle element 129 which can be adjusted with the aid of a screw 130. A pressure medium can flow to the pressure chamber 124 without significant hindrance, since the valve body 126 easily moves away from the pressure of the leather 125 Seat lifts off. However, the pressure medium A can pass through the circulation channel 127, 128 in the opposite direction only at the throttle body 129 over, so that the ^

Flow rate of the pressure medium in the latter direction on the by setting the screw 130 given maximum value is limited.

The valve body 110 has a seal 131 sliding in a cylindrical bore 132 which, when the valve spindle 111 is axially displaced upwards, slides out of this bore and thereby provides a flow path from the chamber 106 through the pipeline 107 and the intermediate chamber 108 to a below the intermediate chamber 108 chamber 133 lying release, which communicates through a duct 134 to the Auesenluft in connection the valve body 110 has. aueeerdem an upwardly-directed seal 135, which cooperates with a valve seat 136, and au so access "of between buyer 108 by the Pipeline 119 » with the chamber 118 connected to the pipe socket 101 blocks.

Buroh displacement of the valve spindle 111 removed upwards The sliding valve body 116 is removed from the seal 1371

ventilirorptr ixe

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which surrounds the valve body 116 in the illustrated position. The extinguishing liquid under pressure thus arrives in space 117, from which it is slowly drained through a duct 138 running in the longitudinal direction which is connected to the chamber 133 and the venting channel 134 via a throttle channel 139.

The two diaphragms 112 and 113 are slightly curved in the shape of a plate. If the chamber 124 is under pressure, the membrane 113 bulges slightly out of the chamber with a certain bias, since the chamber 133 is in communication with the space 140 above the membrane 113 and this consequently communicates with the outside air. To further secure the valve spindle and the valve body arranged on it in the rest position, a compression spring 141 loading the clamping disks 114 and thus also the valve spindle 111 can be provided in the chamber 121.

In the embodiment shown, the pressure chamber "124" communicates through an opening 142 with an expansion chamber 143 ) in which a strong spring 145

Piston 144 loaded in the direction of opening 142 is located.

109809 / OiSO

Claims (8)

Claims fs- (IJ valve device for sprinkler systems, with a Supply line for a pressure medium, characterized in that the device consists of a main valve and a double control valve with an intermediate chamber that has a valve body a valve spindle connected to a control piston that contains the main valve from the supplied Pressure medium is opened and with a pressure chamber with a larger cross section than that of the Main valve located piston is connected, and that the pressure chamber with the intermediate buyer of the Control valve is connected so that the pressure chamber is thereby connected to the pressure medium supply line is when the prevailing in the dormant sprinkler system acts on the control piston of the control valve Pressure keeps the control valve closed, and is brought into contact with the outside air when *
the valve due to a drop in pressure in the sprinkler system is opened. 2. Valve device according to claim 1, characterized in that the control piston is double Control valve so coupled to an alarm valve is that this remains closed when the control piston is different from the one in the sprinkler system at rest Pressure is applied, and in its open position the pressure medium supply line with a pressure sensitive alarm organ connects. 109809 / OfSO 3. Valve device according to claim 2, characterized in that the control valve and the alarm valve are coaxially arranged so that between the "two valves finds a chamber connected to the pressure medium supply line. 4. Valve device according to claim 2 or 3> thereby characterized in that in the connection path between the alarm valve and the alarm organ a drain cock is switched on, which with the pressure medium supply line is connected in such a way that it supplies the pressure medium directly to the alarm organ and the connection to the alarm valve is blocked. 5. Control valve for a valve device according to any one of claims 1-4> characterized in that the valve spindle is attached to two diaphragms is attached, one of which is located in the actuation chamber, while the other is outside the side of the intermediate chamber facing away from the actuation chamber, and that the latter Membrane forms a wall of a pressure chamber, vaLche in with the actuation chamber via a throttle valve Connection is, since there is free flow in the direction of the pressure chamber, in the opposite one Direction restricts the flow, 6. Control valve according to claim 5 »characterized in that that the valve spindle carries a check valve body, which with the double valve body is designed so that the check valve 109809/0750 by removing the valve spindle from the pressure chamber S opens before the double valve body the passage from the intermediate chamber to the outside air S opens, and that of the one on which the intermediate buyer opens facing side of the chamber diaphragm part of the actuating chamber a throttle channel ins Free leads. 7 «control valve according to claim 5 or 6, characterized by ekennzeich.net, that the two membranes are plate-shaped and in a non-loaded condition in Ji Slightly arched towards the mentioned pressure chamber are trained. 8. Control valve according to claim 5, 6 or 7 _f, characterized in that the pressure chamber is designed as an expansion chamber or is connected to such.