EP3338862B1 - Dosing device for fire fighting purposes - Google Patents

Description

The present invention relates to a dosing device for a fire-extinguishing device or for a fire-extinguishing system for mixing an additive into an extinguishing water stream and a use of the dosing device.

Admixers are used to introduce liquid extinguishing agent additives in an adjustable mixing ratio into an extinguishing water flow. An extinguishing foam is then produced from this water-extinguishing agent mixture. Precise admixing or achieving a certain amount of foaming agent in the foaming agent-water mixture is extremely important for foam generation in order to obtain extinguishing foam with a certain consistency.

In the case of mobile proportioners, an adjustable valve (metering valve) is usually installed in the foam concentrate intake line in order to be able to react to any necessary changes in the proportioning rate.

In the DE 10 2006 026 197 A1 an admixer is described which has a control piston with passage bores for an admixing of the foam agent adapted to the amount of extinguishing water. A sleeve with bores is used for fine dosing.

the DE 20 2004 009 297 U1 discloses a further proportioner with a metering valve which has a rotary regulator with an adjustment sleeve with an orifice, in order thereby to change the flow cross-section for the foaming agent flowing into the main channel.

DE 39 23 891 C2 describes a further admixer with an additive channel opening out vertically in the main channel for admixing a foaming or wetting agent, it being possible for a metering valve to be connected to the inlet bore of the additive channel.

Next will be in the DE 10 2015 210 181 B3 a proportioner is described, where the proportioning takes place by means of a dosing sleeve, which has a plurality of over the circumference spaced metering holes contains. Here, an additive channel is connected to a main channel via one of the dosing bores or a dosing opening and an associated orifice opening.

EP 0 318 646 A2 describes a device for generating a water-foaming agent mixture for fire extinguishing purposes with a dosing device, in which a slider interacts with a funnel-shaped opening, whereby small amounts of foaming agent can be metered.

From the DE 40 07 137 A1 , the WO 82/01141 A1 and the U.S. 5,996,700A devices for liquid admixing with a movable piston are known. Also describes the GB 1 025 456 A a device for generating foam with a movable hollow piston with peripherally arranged lateral openings which are located in the vicinity of one end of the piston and through which a medium enters the inner cavity of the hollow piston.

In the U.S. 4,417,601 A describes a liquid valve having a conical valve seat and a movable plug fitting thereon. In a variant, the movable stopper has a cylindrical end with two flattened areas that affect the flow of liquid when the stopper is moved.

A proportioner with a metering valve, which has a cylindrical body with an open cavity for a coarse metering and a control piston with bores for a fine metering, is from DE 10 2006 026197 A1 famous.

Furthermore, a foam metering system with a cylindrical hollow chamber, which has lateral inlet openings, and a movable regulating element for changing the space through which the hollow chamber flows in the WO 2015/061824 A1 described.

Proportioners used to be designed for proportioning rates between 1% and 6%. Today, proportioning rates of 0.1% to 6% are required. This requires sufficient precise dosing devices on the proportioners. This level of accuracy is usually not achieved with conventional proportioners.

The invention is therefore based on the object of creating an alternative dosing device or dosing device for a fire-extinguishing device for admixing an additive, for example a foaming agent or wetting agent, into a flow of extinguishing water.

The object according to the invention is achieved by a dosing device having the features of claim 1 and the use of a dosing device having the features of claim 10 . Advantageous refinements of the invention are specified in the dependent claims.

The dosing device for a fire extinguishing device or for a fire extinguishing system for mixing an additive into a flow of extinguishing water contains an element which can be moved in a cavity and which has at least one depression with a lateral opening at one end and the wall of the cavity has an area in which the lateral opening of the depression is completely covered or closed (covering or occluding area, covering zone), and an area in which the lateral opening of the depression is not covered and is free for a passage of the additive (uncovering or open area, open zone) wherein the movable element is movable from the occluding region to the open region and the admixing rate of the additive depends on the position or displacement of the movable element.

According to the invention, the recess has only one opening to the top or face at one end of the movable member and to the side or a side face of the movable member.

The dosing device according to the invention generally includes an adjusting device or control device for dosing one liquid into another liquid. The liquid to be metered usually contains an additive. The additive is, for example, a foaming agent or wetting agent. The term "additive" encompasses a liquid containing additives.

The dosing device contains a channel for the passage of the additive, which is referred to as a dosing channel. This channel leads from an inlet for the additive to an outlet opening (outlet) which is provided for the outlet of the additive. During the operation of the dosing device, the additive is generally conducted from the outlet of the dosing channel into a liquid flow, in particular into an extinguishing water flow.

The passage (flow) of the additive through the metering channel is changed with the aid of the adjusting device or control device of the metering device, for which purpose a movable element (throttle element) is used. The throttle element acts at a point between the inlet and the outlet opening of the dosing channel. It is placed, for example, in the area of the outlet opening of the dosing channel, but can also be arranged in or on other areas of the dosing channel. The throttle element is preferably designed as a closing and throttle element. However, it can also only be used to throttle the flow of liquid.

The throttle element has at least one depression at one end, which is referred to as the head part. According to the invention, the depression is a notch-shaped, wedge-shaped, channel-like or channel-shaped depression. The recess leads to the side of the header or runs along the side of the header. The head part preferably has a cylindrical or bulbous shape. The throttle element or its head part can also be cuboid and have a rectangular or square cross section. In the case of a cylindrical restrictor or cylindrical head, the top (face) is the surface perpendicular to the cylinder axis. The side is the area that corresponds to the cylinder surface for a cylindrical head part.

The depression on the head part of the throttle element is advantageously shaped in such a way that the width of the depression increases towards the top of the head part, ie the depression narrows with increasing depth along the side of the head part. Preferably, the recess has a V-shaped or wedge-shaped cross-section, ie the shape of the lateral opening of the recess is V-shaped, triangular or wedge-shaped, the lateral opening being widest at the top. Particularly preferably, the indentation runs in a wedge shape from the middle of the upper side of the head part to the side of the head part, the indentation tapering to a point towards the middle of the upper side. Indentations with a V-shaped cross section, i.e. V-shaped shape of the lateral opening, are called throttle notches. Preferably, the indentations have a sloping course from the top to the side of the head part. The head part of the throttle element has, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or more depressions, preferably throttle notches. For example, 3 or more indentations or throttle notches are arranged in a star shape. Notches running obliquely from the top to the side of the head part are very advantageous. the Indentations (eg throttle notches) can be arranged symmetrically or asymmetrically. The indentations (eg throttle notches) can have a symmetrical or asymmetrical shape. The indentations or throttling notches may be located across the entire top or only a portion of the top of the header. Indentations or throttling notches of different sizes, depths or geometries can be arranged in combination on the head part of the throttling element. The indentations or throttle notches run, for example, radially outwards (towards the edge) from the center or a point between the center and the outer edge of the upper side of the head part, advantageously as notches running obliquely outwards.

As an alternative to the indentations on the top of the head part with a lateral opening (opening to the side surface or a side surface), indentations can be used on the side of the head part (lateral indentations). A lateral indentation is, for example, a groove or notch. A side indentation leads to the top of the headboard and has an opening at the top.

The function of the recess is explained using the example of a throttle notch with a V-shaped opening on the side of the head part of a throttle element.

By adjusting the throttle element between certain positions, the degree of coverage of the side opening of a recess on the head part is changed. The lateral opening is usually covered by a surface provided for this purpose in a cavity which is part of the metering channel or is connected to the metering channel. For example, this surface is formed by an area in the dosing channel, which completely or only partially covers the head part of the throttle element closely encloses. If the head part with the depression or depressions is moved out of this area (coverage area), the coverage of the depression can be reduced. Thus, when the head is moved relative to a covering surface, the free or open cross-section of the recess on the side of the head is changed depending on the position. The passage of a liquid through a correspondingly shaped cavity can thus be changed by adjusting the throttle element. The throttle element can be adjusted by a rotary movement, a movement along the dosing channel (stroke movement) or by a rotary movement combined with a movement along the metering channel (rotary/stroke movement).

The functional principle of the throttling of the liquid passage is illustrated in the following example. For example, the dosing device has a dosing channel with a cylindrical section enclosing the head part of a throttle element with a throttle notch. The lateral opening of the throttle notch is completely covered (closed) by the wall of the dosing channel. The cylindrical covering portion of the metering channel (covering area or zone) is followed by an extension or bulge (open zone), e.g., an annular extension, which is part of the metering channel. The transition from the coverage zone to the extension forms a control edge. If the head is now moved from the covering zone into the widening (stroke movement), whereby the lateral opening of the throttle notch with the tip of the triangular opening is to reach the control edge first, only a small part of the cross-sectional area of the throttle notch (area of the lateral opening) is initially free. Due to the V-shaped (triangular) cross-sectional area of the throttle notch (with V-shaped lateral opening, widening towards the top), the free area of the opening increases rapidly with further movement. The characteristic of the throttling can thus be changed by selecting the shape of the cross section of the recess or the shape of the lateral opening.

A recess on a throttle element is a recess suitable for admixture. A recess on a throttle element is usually such that proportioning rates of at least 0.1%, preferably of at least 0.2%, particularly preferably at least 0.5%. In most cases a well is designed for a proportioning rate of up to 6%. As a rule, a depression (e.g. a throttle notch) on the edge of the upper side of a throttle element has a depth of at least 1 mm, preferably at least 2 mm, particularly preferably at least 3 mm and very particularly preferably at least 5 mm. Indentations that are arranged in the lateral surface of a throttle element, e.g. groove-shaped indentations in the area of the lateral surface of a cylindrical throttle element, usually have a length of at least 1 mm, preferably at least 2 mm, particularly preferably at least 3 mm and very particularly preferably of at least 5 mm (measured from the edge of the top). Such indentations generally have a depth of at least 1 mm, preferably at least 2 mm, particularly preferably at least 3 mm and very particularly preferably at least 5 mm. Indentations in the form of a chamfer of an end of a choke element preferably have a straight edge at the top of the choke element (eg from the middle of the top or with an edge running diagonally at the top). Indentations in the form of a bevel have, for example, a height (measured from the upper side or from the upper end of the throttle element) of at least 3 mm, preferably at least 4 mm and preferably at least 5 mm.

The throttle element (movable element) is usually connected or coupled to an adjustment element. However, the throttle element can also contain the adjustment element.

The throttle element can be adjusted (moved) mechanically, hydraulically or pneumatically. A mechanical adjustment can be made manually or with the help of a motor (e.g. electric motor).

The adjusting element is, for example, a part with a cylindrical body with a thread or a helical guide groove, which is used for adjustment. The adjusting element can be part of a threaded drive, a spindle drive, a toothed drive or a drive known to those skilled in the art.

The adjusting element is preferably equipped with a latching function, whereby latching takes place at specific settings that correspond to a specific dosage. For example, a latching device can be provided in which one or more latching pins engage in depressions in certain positions of the adjustment element.

The throttle element can be permanently connected to the adjustment element or can form a unit or part with the adjustment element. The throttle element can also be loosely coupled to the adjustment element, e.g. via a driver.

The metering device can be designed as a stand-alone, detachable or detachable part, e.g. as a metering valve with one or more fastening devices.

The dosing device or the dosing valve have, for example, a cylindrical base body with a dosing channel and an inlet and an outlet for the additive. Fastening devices, e.g. screw or bayonet connections, can be arranged at the input and output. In the case of a hand-operated dosing valve, the adjustment element is equipped with or coupled to an actuation unit (e.g. hand wheel or rotary handle). The adjusting element acts on the throttle element.

The base body, throttle element and adjusting element are made of metal or plastic, for example. Metals are e.g. copper-zinc alloys, especially brass, or stainless steel. Suitable plastics are usually plastics that are not attacked by the additive. Parts made of metal or plastic can be partially or fully coated.

The dosing device has a simple structure, but allows very precise setting of the smallest proportioning rates. It can be produced inexpensively. The dosing device is advantageously used in a proportioner. The dosing device can be integrated or built into a proportioner.

If the dosing device is integrated in a proportioner, the dosing device is referred to as a dosing device. The term "metering device" as used herein includes metering devices. The dosing device is, for example, an independent unit, which is intended for attachment or assembly to a proportioner, for example, or is otherwise used in a fire extinguishing device, or is integrated in a proportioner. The dosing device can be part of the admixer (permanently integrated) or a separate part that can be exchanged or detached, for example.

The general structure of an admixer for a fire extinguishing device for admixing an additive in a stream of extinguishing water is, for example, in DE 10 2015 210 181 B3 , the DE 10 2006 026 197 A1 and the DE 20 2004 009 297 U1 described, to which reference is hereby made.

The admixer usually has a base body with a main channel for the extinguishing water. The main channel has an inlet for the additive, where the dosing device is generally placed.

An admixture for a fire extinguishing device or for a fire extinguishing system for admixing an additive that contains a dosing device according to the invention is therefore advantageous.

Another object of the invention is the use of a dosing device according to the invention in a fire extinguishing device or a fire extinguishing system, in particular in or on an admixer. The dosing device can generally be used for dosing or admixing a liquid.

Furthermore, the use of a movable element having a head part with one or more recesses having an opening in the side of the head part in a metering valve, in particular in a liquid metering valve, is advantageous. Such movable elements are for the dosing device according to the invention described. The movable member is, for example, a movable member having one or more choke notches.

The invention is explained with reference to the drawing, the invention not being restricted to the examples shown.

• Fig. 1 ein Schema einer Dosiervorrichtung in geschlossenem Zustand (Querschnitt);
• Fig. 2 ein Schema einer Dosiervorrichtung in etwas geöffnetem Zustand (Querschnitt);
• Fig. 3 ein Schema einer Dosiervorrichtung in offenem Zustand (Querschnitt);
• Fig. 4 eine Dosiervorrichtung in einem Zumischer in geschlossenem Zustand (Querschnitt);
• Fig. 5 eine Dosiervorrichtung in einem Zumischer in geöffnetem Zustand (Querschnitt);
• Fig. 6 ein Drosselelement (3D-Ansicht);
• Fig. 7 ein Drosselelement (Seitenansicht);
• Fig. 8 ein Verstellelement (3D-Ansicht);
• Fig. 9 ein Verstellelement (Seitenansicht);
• Fig. 10 einen Zumischer mit Dosiervorrichtung (3D-Ansicht);
• Fig. 11 verschiedene Kopfteile von Drosselelementen für Hubbewegung (Seitenansicht);
• Fig. 12 verschiedene Kopfteile von Drosselelementen für Drehbewegung (Seitenansicht);
• Fig. 13 verschiedene Kopfteile von Drosselelementen (Ansicht der Oberseite).

Show it:

• 1 a scheme of a metering device in the closed state (cross-section);
• 2 a scheme of a dosing device in a slightly open state (cross-section);
• 3 a scheme of a metering device in the open state (cross-section);
• 4 a dosing device in a proportioner in the closed state (cross-section);
• figure 5 a dosing device in an admixer in the open state (cross-section);
• 6 a throttle element (3D view);
• 7 a throttle element (side view);
• 8 an adjustment element (3D view);
• 9 an adjustment element (side view);
• 10 an admixer with dosing device (3D view);
• 11 various head parts of throttle elements for lifting movement (side view);
• 12 various head parts of throttle elements for rotary movement (side view);
• 13 various throttle element heads (top view).

The highly simplified scheme in Fig.1 shows a dosing device 1 for a fire extinguishing device or a fire extinguishing system, in particular for an admixer or for use in the area of an admixer, with a base body 2 and a movable element (throttle element) 3. The throttle element 3 is, for example, cylindrical or cuboid. Metering device 1 is usually used for admixing or metering an additive, such as foaming agent or wetting agent, in a stream of extinguishing water. The term "additive" includes a liquid containing an additive. The metering device 1 can, for example, as Metering valve, in particular as an independent or separate part or as part of an admixer (integrated metering device), be designed. The base body 2 has a cavity 4 for receiving the throttle element 3, an inlet 5 for the additive and an outlet 6 for the additive. The dosing channel is located between input 5 and output 6 . The cavity 4 and the throttle element 3 preferably have a cylindrical shape. The throttle element 3 can be moved in the cavity along the axis AA (longitudinal axis). The movement of the throttle element 3 is used for adjustment, for example in order to set a specific dosing value or a specific proportioning rate. In general, the throttle element 3 is moved axially (along the longitudinal axis AA) for adjustment. The movement can be, for example, a rotary movement, a lifting movement or a rotary movement and lifting movement. The throttle element 3 is adjusted, for example, via an adjustment element (not shown here), which can be contained in the throttle element 3 . The adjustment is made manually, for example, with the aid of a thread drive, a spiral groove drive, a spindle drive or a pinion drive. A motor, in particular an electric motor, can also be used for adjustment. Pneumatic or hydraulic adjustment can also be provided. An axial displacement of the throttle element 3 can be brought about by a rotary movement, for example in the case of a threaded drive, or by displacement.

The throttle element 3 has one end 3a (head part) with at least one depression 7, designed here as a throttle notch, and one end 3b (rear end). The recess 7 runs from the side with the side opening 3c of the head part to the top (front side) at the end 3a. In the position of the throttle element 3 shown, the throttle element 3 closes the dosing channel in the area of inlet 5.

In 2 is the throttle element 3 of the metering device 1 of 1 adjusted in such a way that the lateral opening 3c of the recess 7 is no longer completely covered by the base body 2 and the dosing channel is slightly open at the edge 8 (called the control edge) of the base body 2 . The free liquid path for the additive from inlet 5 to outlet 6 is marked by an arrow. Through the narrowing of the dosing channel in the area of the control edge 8 throttles the liquid flow.

With a V-shaped cross section of the depression 7 (throttle notch), in particular through a side opening 3c that widens towards the top with a depth of the depression 7 increasing towards the top, very small proportioning rates (eg 0.1% to 1%) can be set very precisely will.

To set specific admixing rates, a latching function can be provided, for example by latching points (e.g. hemispherical indentations) on the outside of throttle element 3 or an adjusting element, into which a pin or ball engages by spring force when adjusting to a specific position. Such latching functions, latching elements or adjustment aids are known to those skilled in the art.

3 shows the dosing device 1 of FIG 1 when fully open. The control edge 8 releases the lateral opening 3c of the recess 7 completely. The liquid flow (see arrow) between inlet 5 and outlet 6 is unrestricted or at maximum.

In 4 and figure 5 an exemplary embodiment of an admixer 9 with an integrated dosing device 1 is shown. The proportioner 9 has a base body 2 in which the so-called main channel 10 is located and which extends from a water inlet end (1 9 in 10 ) to an extinguishant outlet end ( 20 in 10 ). For example, at the ends (inlet and outlet) of the main duct 10 there is a coupling for connecting a fire hose or other fire brigade equipment.

The dosing channel with outlet 6 of the integrated dosing device 1 opens into the main channel 10. The base body of the dosing device 1 is part of the base body 2 of the proportioner 9. With the help of the dosing device 1 , an additive can be added to the flow of extinguishing water in the main channel 10 . The main channel is equipped with a Venturi nozzle, for example, so that additive is sucked in from the main channel 10. The additive reaches the metering device 1 via the inlet 5. The additive flow can flow through the throttle element 3 reduced (throttled) or interrupted (closed). The throttle element 3 is connected to an adjustment element 11 . For example, the throttle element 3 is screwed to the adjustment element 11 . Throttle element 3 and adjusting element 11 are located in a cavity (corresponding to cavity 4 in Figures 1-3 ) of the base body 2. Throttle element 3 and adjusting element 11 are cylindrical in shape. Arranged on the adjusting element 11 are a spirally extending groove 13, an annular groove 12 for receiving a sealing ring 15 and a plurality of latching points (recesses or recesses for latching). A guide pin 14 engages in the spirally extending groove 13 for the drive. The groove 13 and guide pin 14 form a drive device (spiral drive). The adjusting element 11 is equipped with an actuating element 17 (for example a hand wheel or rotary handle) for manual adjustment. A latching element 16 (for example with a pin or a ball and a compression spring) is provided for latching into the latching points on the adjustment element 11 at specific positions of the adjustment.

The dosing of the additive, i.e. the setting of the proportioning rate, is carried out by adjusting the dosing element 3 between the in 4 shown position (mixing rate 0%; "closed") and in figure 5 position shown (proportioning rate almost 6%; "Open", maximum proportioning rate). The adjustment is made here by turning the operating element 17.

The additive inlet 5 is connected to a container with additive, for example via a coupling to which a hose or a line is connected. A check valve can be provided in the area of the additive outlet 6 .

The proportioner 9 is usually equipped with one or more feet or attachment parts 18 .

4 shows proportioner 9 with metering valve 1 closed (proportioning rate 0%). The base body 2 in the area of the additive outlet 6 and the control edge 8 covers the side opening 3c of the throttle notches 7 . The dosing channel is closed. In In this position of the dosing element 3 , the addition of additive is interrupted.

figure 5 shows proportioner 9 with metering valve 1 fully open (proportioning rate almost 6%, maximum proportioning rate). The side opening 3c of the throttle notches 7 is located outside the area between the additive outlet 6 and the control edge 8 and is no longer covered by the base body 2 . The lateral opening 3c of the throttle notches 7 is free. In this position of the throttle element 3 , the admixing of additive is not throttled or is set to the maximum admixing rate (end position). The arrow drawn in the area of the dosing channel shows the free path for the additive from input 5 to output 6.

The throttle element 3 of the in 4 and figure 5 shown proportioner 9 is in 6 (perspective view) and 7 (side view) shown.

This in 6 The throttle element 3 shown in a perspective view corresponds to that in 4 and figure 5 shown throttle elements 3. The throttle element 3 has a cylindrical head part with the top 3a (front face), which is followed by a fastening part with the end 3b . The header has three indentations 7 leading from the center of the top 3a to the side of the header. The recess 7 is notched here and is therefore referred to as a throttle notch. The depressions 7 shown are notches with an oblique course. The edge at the bottom of a recess 7 runs obliquely to the top 3a. The area of the opening on the side of the headboard ( 3c in 4 and 5 ) has a triangular shape. The throttle notch has a V-shaped cross section. The shape, depth, opening angle and number of depressions 7 can be changed and are selected according to the desired dosing characteristics. The throttle element 3 contains, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or more depressions 7. Different depressions 7 can be combined. For example, the throttle element 3 can contain depressions 7 with different shapes, depths or opening angles. The indentations 7 do not have to start from the center of the upper side 3a (radial progression). For example, one or more Wells 7 run diagonally or sectorally. Indentations 7 with different depths (relative to the upper side 3a, ie the lateral length of the indentation) and widths are advantageously arranged on the head of throttle element 3 . For example, at least one deep and narrow indentation 7 can be combined with at least one less deep and wider indentation 7 on the throttle element 3 . Thus, the deeper (laterally longer) depressions 7 , when moving from the complete covering of the lateral openings (out of the covering zone) via the control edge 8 , first into the dosing zone (openings 3c partially or completely open). A very small proportioning rate can thus be set much more precisely.

The fastening part (part of the throttle element 3 ) with the end 3b serves to fasten the throttle element 3 to the adjustment element 11. For screwing to the adjustment element 11 , the fastening part is equipped with a thread (not shown here), for example.

The edges of the throttle element 3 are advantageously beveled or rounded. A bevel (chamfer) of the outer edge of the top 3a is shown in 6 shown. This bevel (bevel) of the outer edge is not a depression within the meaning of the invention and is not used for admixture.

In the side view is the throttle element 3 of 6 in 7 to see. The V-shaped depression 7 is arranged on the head part. In the area of the end 3b there is a thread which is used for attachment to the adjustment element 11 .

8 and 9 show the adjusting element 11 of the dosing device 1 of FIG 4 and figure 5 shown admixer 9 in a perspective view ( 8 ) and side view ( 9 ). The cylindrical body of the adjusting element 11 has a helical groove 13 which adjusts the position of the throttle element 3 by turning the actuating element 17 . Depending on how the throttle element 3 is coupled to the adjusting element 11 , when the actuating element 17 is rotated, the throttle element 3 performs a lifting movement (axial displacement along the longitudinal axis AA, see Figures 1 to 3 ) or a turning and lifting movement. When the throttle element 3 is firmly connected to the adjustment element 11 , for example by screwing, a rotary and lifting movement is carried out. With loose coupling of the throttle element 3 with the adjustment element 11, so that the rotation of the adjustment element 11 is not transmitted to the throttle element 3 , a lifting movement is carried out by the throttle element 3 .

The annular groove 12 on the adjustment element 11 is used to attach a sealing ring 15 for sealing the cavity in which the adjustment element 11 is located.

The proportioner 9 from 4 and figure 5 is in 10 shown in perspective.

The admixer 9 has an input 19 and an output 20 for the extinguishing water. The main channel 10 is located between the input 19 and the output 20 . The dosing device 1 is integrated into the proportioner 9 . The additive is fed to the dosing device 1 via the input 5 . You can also see the locking element 16, the guide element 14 (guide pin) and the actuating element 17 (handwheel, rotary handle), which act on the adjustment element 11 . The dosing channel for the additive opens into the main channel 10. The admixer 9 is equipped with two feet 18 .

11 shows a schematic representation of the head parts of a throttle element 3 (side view) with different shapes and designs of depressions 7. You can see the open sides 3c of the depressions 7. The head parts of the examples shown are cylindrical or piston-shaped and are intended for dosing devices 1 with throttle elements 3 that are moved by lifting movement or rotary and lifting movement. The indentations 7 can, for example, run diagonally, radially or sectorally (in a circle segment) on the upper side 3a of a throttle element 3 or are flat (e.g. groove-like) indentations on the side of a head part (lateral indentations) which form an opening to the upper side 3a of the have the head part and do not run over the entire side of the head part (recesses in the shell area (area of the cylinder shell) of the head part with opening to the top 3a and termination in the lower part of the head part). The double arrows on the left-hand side indicate the direction of movement of the throttle element 3 or its head part.

In the Fig. 11a) The depression 7 shown with a lateral opening 3c is, for example, V-shaped, wedge-shaped or notch-shaped. The depression 7 is, for example, a throttle notch. the side opening 3c is triangular. The tip or end of the depression 7 is, for example, in the lower region of the head part and does not reach the lower end of the head part. The (pointed) end of the recess 7 can also be in the central area (for example in the middle of the side or halfway up) of the head part or in the area of the upper side 3a . A V-shaped depression 7 is advantageous for dosing (mixing) from smaller to larger amounts of liquid. An adjustment of the throttle element 3 causes a linear change in the proportioning rate.

In Fig. 11 b) several wells 7 are combined. The combination of different depressions 7 is shown here. The recesses 7 may have a rectangular side opening 3c and are, for example, slit-shaped or groove-shaped (side surface groove). The depth (lateral length) of the recesses 7 is stepped (step arrangement of the recesses 7 ). A graded adjustment of the proportioning rate can be made here.

Fig. 11 c) shows a rounded or channel-shaped depression 7. The lateral opening 3c has, for example, the shape of a parabola. The change in the proportioning rate is non-linear.

Fig. 11d) shows a stepped depression 7. As in Fig. 11 b) a graded admixture is achieved.

An example of the combination of depressions 7 with different shapes is in Fig. 11e) shown. In Fig. 11 f) these forms are united in a recess 7 . A V-shaped tip could also be combined with one or more trapezoid-shaped areas.

12 shows cylindrical throttle elements 3 or their head parts, which are provided for a rotary movement (rotation about the axis AA). The indentations 7 with a side opening 3c are flat indentations in the jacket area of the head part. To set the proportioning rate, the lateral opening 3c is rotated from a covered zone to an open zone. Cover zone and open zone are not ring-shaped around the head part of the throttle element 3 arranged, but are, for example, open or closed partial surfaces of the wall of a cavity 4.

Fig. 12 a) shows a depression 7 with an analogous function Fig. 11a) . The throttle element 3 in Fig. 12 b) is analogous to Fig. 11e) .

In 13 is the view of the top 3a of a throttle element 3 of various examples. In Fig. 13 a) to c) radially extending depressions 7 can be seen, designed here, for example, as a throttle notch. In Fig. 13 a) runs the recess 7 from the center to the edge of the top 3a. In Fig. 13 b) and c) runs the recess 7 from another point of the top 3a to the edge of the top 3a, wherein in Fig. 13 c) the recess 7 is only in the edge area (shell area). For example, instead of the example with a throttle notch, the indentation 7 could be a shallow indentation such as a groove. Fig. 13d) shows a diagonal arrangement of two indentations 7 (eg two throttle notches). Fig. 13e) shows a star-shaped or cross-shaped arrangement of four depressions 7 (eg four throttle notches). Fig. 13 f) shows a diagonal depression 7 (eg a slit). Fig. 13 g) shows a sectoral depression 7 (eg a slit).

Reference sign

1

dosing device

2

body

3

Movable element, throttle element

3a

end, headboard, top

3b

end, back end

3c

side opening, open side

4

cavity

5

Entrance, inlet, additive inlet

6

Outlet, additive outlet, additive outlet

7

indentation, throttle notch

8th

edge, control edge

9

proportioner

10

main channel

11

adjustment element

12

annular groove

13

spiral groove

14

Guide element, guide pin

15

sealing ring

16

locking element

17

Actuating element, hand wheel, rotary handle

18

Fastening part, stand

19

water inlet end

20

extinguishing agent outlet end

Claims (11)

1. Dosing device (1) for a fire extinguishing device or for a fire extinguishing system for mixing an additive into a flow of extinguishing water, containing an element (3) movable in a cavity (4), characterized in that the movable element (3) at one end (3a) has at least one notch-shaped, wedge-shaped, channel-like or channel-shaped recess (7) with a lateral opening (3c), the recess (7) open only to the top (3a) and to the side of the movable element (3), and the wall of the cavity (4) has a closing area in which the lateral opening (3c) of the recess (7) is completely covered or closed, and an open area, in which the lateral opening (3c) of the recess (7) is not covered and is free for the additive to pass through, where the movable element (3) is movable from the closing area into the open area and the admixing rate of the additive depends on the position or the adjustment of the movable element (3).
2. Dosing device (1) according to claim 1, characterized in that the recess (7) on the top (3a) of the movable element (3) runs radially, diagonally or sectorally or the recess (7) is located on the side of the movable element (3) and extends to the top (3a) of the movable element (3).
3. Dosing device (1) according to claim 1 or 2, characterized in that the movable element (3) contains a plurality of recesses (7), which differ in shape, volume or depth or are arranged in a stepped manner.
4. Dosing device (1) according to one of the preceding claims, characterized in that the recess (7) or recesses (7) are designed in such a way that the admixing rate of the additive can be adjusted linearly or non-linearly.
5. Dosing device (1) according to one of the preceding claims, characterized in that the movable element (3) can be adjusted mechanically, pneumatically, hydraulically, with the aid of a motor, with the aid of an electric motor or manually or the dosing device (1) contains a mechanical, pneumatic, hydraulic or manual moveable device or adjustment device with or without a motor.
6. Dosing device (1) according to one of the preceding claims, characterized in that the movable element (3) is partially or completely cylindrical or piston-like in shape and a movement device or adjustment device is provided for a rotary movement, a movement by a stroke or a rotary movement and movement by a stroke.
7. Dosing device (1) according to one of the preceding claims, characterized in that the dosing device (1) contains a device with a screw drive, drive with spiral groove, pinion or other mechanical drive for adjusting the movable element (3).
8. Dosing device (1) according to one of the preceding claims, characterized in that the recess (7) is channel-shaped, wedge-shaped, slot-shaped, notch-shaped or step-shaped, shows a V-shaped, triangular, parabolic or rectangular shape of the lateral opening (3c) or is symmetrical or asymmetrical.
9. Dosing device (1) according to one of the preceding claims, characterized in that the dosing device (1) is contained in an admixer (9) for a fire extinguishing device or a fire extinguishing system or is connected to an admixer (9) for a fire extinguishing device or in a fire extinguishing system.
10. Use of a dosing device (1) according to one of Claims 1 to 8 for metering or admixing a liquid.
11. Use according to claim 10, characterized in that the metering or admixing of a liquid takes place in a fire extinguishing device or a fire extinguishing system.

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