Fire extinguishing fitting with solid material net holder

Description

[0001] The present invention relates to a fire extinguishing fitting according to the preamble of claim 1, as well as a solid wetting agent holder for such a fire extinguishing fitting.

[0002] When fighting fires and / or cooling objects using extinguishing water, it is advantageous to add a wetting agent to the extinguishing water to reduce the water's surface tension. This allows the extinguishing water to penetrate more easily into the pores and openings of the burning material, and a foam film can be formed that acts as a barrier to the atmospheric oxygen surrounding the burning material. This can reduce smoke formation and the flammability of the extinguished material.

[0003] Traditionally, a liquid wetting agent was added to the extinguishing water to reduce surface tension. This liquid wetting agent had to be mixed with the extinguishing water in special mixing devices to achieve the desired effect. Solid wetting agents are also known, which, like a bar of soap, must be rinsed around by the extinguishing water so that the extinguishing water absorbs the wetting agent. For this purpose, tubular mixing devices, in which the solid wetting agent is held in a holder, are screwed into the extinguishing water line between two pieces of hose or into the jet pipe. Such mixing pipes therefore require additional equipment for the fire department and, due to their design, are comparatively bulky and expensive.

[0004] DE 85 19 419 U1 describes such a mixing tube for foam generation by supplying water. The mixing tube has a water-flushed insert for the solid wetting agent and is provided with two connectors by means of which it can be screwed onto a jet pipe. For this purpose, the mixing tube has two threaded connections, with a water-jetting tube being connected to the rear threaded connection, and a jet pipe, mouthpiece, nozzle head, or the like being connected to the front threaded connection. Accordingly, the mixing tube is positioned as an additional component in series with the jet pipe or the like.

[0005] DE 94 05 828 U1 describes a corresponding mixing device, which also has two threaded connections for screwing between two fire hoses. In this mixing tube, the solid wetting agent holder is positioned in a secondary pipe parallel to a main pipe. The mixing device has a three-way valve that, in a first position, directs the extinguishing water through the secondary pipe with the solid wetting agent holder and, in a second position, through the main pipe, so that the solid wetting agent holder is not flowed through by the extinguishing water. Here, too, the mixing tube is connected in series with the conventional fire extinguishing fittings or hoses.

[0006] DE 525 259 A discloses a jet pipe for fire extinguishing purposes with a chamber for a solid wetting agent. The chamber represents an extension of the jet pipe and is provided with a hinged lid at one axial end to allow the solid wetting agent to be inserted into the chamber. The lid is attached to the outside of the chamber by means of a closure. Thus, to insert the solid wetting agent into the chamber, the lid must first be removed, and after insertion, the lid must be properly closed with the closure.

[0007] BE 426 082 A also discloses a chamber for a solid wetting agent, closed at the front end by a lid, whereby the chamber can be inserted between two hoses using connecting flanges. Here, too, a comparatively complex disassembly of the lid is required to insert the solid wetting agent into the chamber, as well as reassembly of the lid after insertion.

[0008] For further prior art, reference is made to WO 2012 / 103569 A1 and US 2009 / 0301741 A1.

[0009] The present invention is based on the object of providing a fire extinguishing fitting and a solid wetting agent holder for such a fitting, which avoids the aforementioned equipment expenditure and enables a cost-effective, easy-to-handle and rapid addition of solid wetting agent to the extinguishing water.

[0010] The object of the invention is achieved by a fire extinguishing device and a solid wetting agent holder according to the independent claims. Advantageous and particularly useful embodiments of the invention are specified in the dependent claims.

[0011] A fire extinguishing fitting according to the invention, designed as a jet pipe, for example, a hollow jet pipe, has a water inlet end and a water outlet end, wherein the water inlet end and the water outlet end are connected to each other via a water passage for conducting extinguishing water. In order to be able to control the extinguishing water flow through the jet pipe, a component in the form of a ball valve or valve is provided in the water passage between the water inlet end and the water outlet end to control the extinguishing water flow from the water inlet end to the water outlet end.

[0012] According to the invention, a solid wetting agent holder is inserted into the water inlet end and / or the water outlet end, i.e. directly in the jet pipe, i.e. not in series therewith, wherein this solid wetting agent holder can be removed and inserted through the water inlet end or water outlet end, i.e. the end into which it is inserted, without dismantling the fire extinguishing fitting, i.e. in the assembled state of the fire extinguishing fitting or the jet pipe.

[0013] According to the invention, the solid wetting agent holder comprises an insert that can be flushed with fire-fighting water and has an inner receiving space in which a solid wetting agent is accommodated. According to one embodiment of the invention, it is formed solely by this insert. The insert can, for example, be manufactured in one piece, particularly from plastic, advantageously by injection molding.

[0014] The invention significantly reduces the manufacturing effort for the solid wetting agent holder, which does not require a cladding tube surrounding the insert because it is inserted directly into the water inlet or outlet end, compared to known solid wetting agent holders with surrounding tubes and additional valves. Furthermore, the solid wetting agent, also known as a solid wetting agent cartridge, can be changed more quickly and easily, even though it consists exclusively of the wetting agent itself, similar to a bar of soap. This makes it entirely possible for firefighters to carry a large number of such solid wetting agent holders, each of which can already contain the solid wetting agent.The insertion of the solid wetting agent into the solid wetting agent holder can also advantageously be carried out without dismantling the solid wetting agent holder, which in a particularly advantageous embodiment is formed solely by the insert and can be bent open, for example, at least at one end in order to introduce the wetting agent into the inner receiving space of the insert.

[0015] The insert can, for example, be made of a corrosion-resistant, flexible material, such as polyamide.

[0016] According to one embodiment of the invention, the solid wetting agent is added directly to the insert during its production, for example, enclosing a core of the insert. Alternatively, the solid wetting agent is produced independently of the insert or solid wetting agent holder, so that one and the same solid wetting agent holder can be equipped with a solid wetting agent multiple times.

[0017] Particularly advantageously, the solid wetting agent holder is designed such that it removably holds the solid wetting agent in the receiving space. This allows the solid wetting agent to be inserted into and removed from the receiving space without damaging it.

[0018] If the fire extinguishing fitting is designed according to the invention in the form of a jet pipe, the water outlet end will generally be designed as a free-jet end for generating a water jet, wherein in particular means for regulating the throw distance and / or jet bundling are provided in the jet pipe.

[0019] If the solid wetting agent holder, which is then formed in particular solely by the insert and is advantageously manufactured in one piece, is removable from the fire extinguishing fitting when assembled, this means that the fire extinguishing fitting itself does not need to be disassembled to remove or insert the solid wetting agent holder. However, it is usually necessary to unscrew a hose or other pipe or other fitting connected to the corresponding end in which the solid wetting agent holder is inserted in order to access the solid wetting agent holder and insert it into or remove it from the end.

[0020] At least one or more of the following components can be provided between the water inlet end and the water outlet end of the fire extinguishing fitting according to the invention or in the water inlet end or water outlet end: a vent; a check valve or non-return valve; a shut-off valve; .

[0021] The solid wetting agent holder according to the invention for insertion into a fire extinguishing fitting has an insert which has a plurality of webs which are spaced apart from one another in the circumferential direction of the receiving space and thus in the circumferential direction of the water inlet end or water outlet end into which it is inserted, which webs extend in the longitudinal direction of the receiving space and thus of the water inlet end or water outlet end and delimit the receiving space on its outer circumference, but only in sections due to the web shape, wherein in particular the circumferential areas not covered by the webs are each individually and / or in total larger than the circumferential areas covered by the webs.

[0022] The webs are connected to one another in a form-fitting, material-fitting and / or force-fitting manner at least at a first axial end and are designed to end freely at a second axial end facing away from the first axial end, wherein the webs are advantageously connected to one another exclusively at their first axial end and, according to an advantageous embodiment, extend linearly in the axial direction starting from this first axial end.

[0023] According to an advantageous embodiment, the webs have a deflection radially inwards at their second axial end, so that at least in the non-bent state they partially enclose the solid wetting agent on its axial end face and thus prevent it from slipping out of the insert.

[0024] If the webs are deformable at their second axial end and in particular with their entire axial section starting from the first axial end to the second axial end in the radial direction and / or tiltable relative to one another in order to enable the insertion of a solid wetting agent via the second axial end into the inner receiving space, the areas of the webs which encompass the end face of the solid wetting agent in the inserted state are advantageously dimensioned such that, when the insert is inserted into the water inlet end or water outlet end of a fire extinguishing fitting as a solid wetting agent holder, slipping out of the solid wetting agent is prevented if the webs rest radially on the outside against the reveal of the water inlet end or water outlet end.Only when the insert is removed from the water inlet end or water outlet end is it possible to bend the insert or tilt the webs so far that the solid wetting agent can be removed or a new solid wetting agent can be inserted into the inner receiving space.

[0025] According to an advantageous embodiment, the webs have a radially outwardly open recess at their second axial end to form a gripping element. This makes it possible for the solid wetting agent holder to be easily grasped by inserting the user's fingers into the recesses, even if the insert is slightly jammed when inserting the solid wetting agent holder into the water inlet or water outlet end. The necessary pulling force can thus be exerted on the solid wetting agent holder or insert to pull it out of the water inlet or water outlet end.

[0026] According to one embodiment of the invention, the insert has at least one mandrel or core element for pressing or embedding into the solid wetting agent.

[0027] The invention will be described below using exemplary embodiments and the figures.

[0028] Show it. Figure 1 shows an exemplary design of a solid wetting agent for a solid wetting agent holder according to the invention; Figure 2 shows a solid wetting agent according to the Figure 1 inserted into a solid wetting agent holder according to the invention when inserting the solid wetting agent holder into the inlet end of a jet pipe; Figure 3 shows a representation corresponding to the Figure 2 with the solid wetting agent holder inserted into the inlet end of a jet pipe; Figure 4 shows the state from the Figure 3 in a sectional view through the jet pipe; Figure 5 another view of the solid wetting agent holder from the Figures 2 to 4without a solid wetting agent inserted; Figure 6 shows an alternative design of a solid wetting agent holder with a solid wetting agent inserted; Figure 7 shows a further schematic representation of an axial end of a solid wetting agent holder according to the invention.

[0029] In the Figure 1 A possible design of a solid wetting agent 1 is shown, which can be used with a solid wetting agent holder according to the invention. In this embodiment, the solid wetting agent 1 is designed as a cylindrical block. However, other designs are also possible.

[0030] In the Figure 2The solid wetting agent 1 is now inserted into a solid wetting agent holder 2 designed according to the invention. The solid wetting agent holder 2 consists of an insert 3 that encloses an inner receiving space 4 into which the solid wetting agent 1 is inserted. In the case of a solid wetting agent 1 that is not yet worn out or partially dissolved, the inner receiving space 4 is completely filled by the solid wetting agent 1.

[0031] The insert 3 has a plurality of webs 5 extending in the axial direction of the inner receiving space 4, which are connected to one another at a first axial end 6 and have an opposite second axial end 7, which is designed as a free end. At the second axial end 7, the webs 5 are bent radially inward so that, at least when inserted into a water inlet end or water outlet end, they engage around the end face 8 of the solid wetting agent 1 and thus hold it in a form-fitting manner in the inner receiving space 4. At the opposite first axial end 6, the insert 3 is held to one another at the end face by the connection of the webs 5.

[0032] The webs 5 further have, at their second axial end 7, radially outwardly open indentations 9, which are partially formed by the sections encompassing the end face 8 and further by radially outwardly directed end regions of the webs 5. These indentations 9 enable a user to intervene in order to pull the insert 3 or the solid wetting agent holder 2 out of a water inlet end or water outlet end of a fire extinguishing fitting.

[0033] In the Figure 2Also shown is a jet pipe 10, with a water inlet end 11 and a water outlet end 12 (only indicated here), which are connected to each other by a water passage 13 for conducting extinguishing water. The flow of the extinguishing water through the water passage 13 is controlled by the control element 14. In the illustrated embodiment, a control element 15 is also provided, with which the focus of the jet, which freely exits from the water outlet end 12, can be changed. The control element 14 is designed, for example, as a ball valve.

[0034] The outer contour of the solid wetting agent holder 2 now corresponds to the inner contour of the water inlet end 11, so that the solid wetting agent holder 2, here formed solely by the insert 3, can be inserted into the water inlet end 11 in a form-fitting manner and is held there slightly clamped.

[0035] In the illustrated embodiment, the insert 3 is tapered at its front insertion end, i.e., in the axial section that ends with the first axial end 6, to achieve a clamping fit by wedging. In the remaining axial area, the insert 3 is particularly cylindrical, with the exception of the indentations 9.

[0036] In the Figures 3 and 4The inserted state of the solid wetting agent holder 2 with the solid wetting agent 1 located in the inner receiving space 4 in the water inlet end 11 of the jet pipe 10 is shown again. The corresponding elements are designated by corresponding reference numerals. In the illustrated embodiment, the second axial end 7 of the solid wetting agent holder 2 protrudes from the water inlet end 11 when fully inserted into the water inlet end 11. However, this is not mandatory. Alternatively, the solid wetting agent holder 2 could be positioned completely within the water inlet end 11.

[0037] In the Figure 5the solid wetting agent holder 2 is shown again without the solid wetting agent inserted. Here, the various sections of the webs 5 can be seen again, namely, starting from the first axial end 6, a conical section 5.1, followed by a cylindrical section 5.2, followed by the indentations 9 at the second axial end 7. It is also particularly clear again that the second axial ends 7 of the webs 5 are designed as free ends, whereas the webs 5 are connected to one another at the first axial end 6, here for example via a ring shape. Due to the fact that the webs 5 extend in the axial direction of the inner receiving space 4 and are designed spaced from one another in the circumferential direction of the inner receiving space 4, large openings are created through which the extinguishing water can penetrate into the inner receiving space 4 in order to flow around the solid wetting agent then inserted there.

[0038] In the Figure 6An embodiment of a solid wetting agent holder 2 is shown, which offers an even greater free passage for the extinguishing water, since the two axial ends 6, 7 of the insert 3 are only connected to each other by a core element 16 embedded in the interior of the solid wetting agent 1. The core element 16 can, for example, run centrally through the solid wetting agent 1 and either be subsequently inserted into it or the solid wetting agent 1 is manufactured directly on the core element 16. In the embodiment shown, the insert 3 still has comparatively short webs 5 running in the axial direction of the inner receiving space 4, which here is more or less only encompassed by the insert 3 at its end faces. In the embodiment according to the Figure 7In contrast, the insert 3 has only two axial ends 6, 7 extending in the radial direction, which are connected to each other by the core element 16. As schematically indicated, the two disc-shaped end regions of the insert 3 are positioned on the two end faces of the solid wetting agent 1, whereas the outer periphery of the solid wetting agent 1 is completely exposed and thus not covered by the insert 3.

[0039] Deviating from the representations in the Figures 6 and 7The insert 3 could also have fewer than the four or six arms shown at its two axial ends 6, 7, in particular only one linear element each extending at least over the end face of the solid wetting agent 1. Advantageously, however, the two end-face elements are aligned at an angle to one another, in particular perpendicular to one another, so that optimal centering of the solid wetting agent 1 in the water inlet end or water outlet end is achieved.

Claims

1. Fire extinguishing fitting in the form of a jet pipe (10), having a water inlet end (11) and a water outlet end (12), which are connected to each other via a water passage (13) for conducting extinguishing water; wherein 1.2 a control element (14) in the form of a ballcock or valve is provided in the water passage (13) between the water inlet end (11) and the water outlet end (12), which controls a flow of extinguishing water flowing from the water inlet end (11) to the water outlet end (12); wherein 1.3 a solid wetting agent holder (2) is provided, which has an insert (3) that can be flushed with extinguishing water and has an inner receiving space (4) in which a solid wetting agent (1) is received; characterized in that 1.4 the solid wetting agent holder (2) is inserted into the water inlet end (11) or the water outlet end (12), and the solid wetting agent holder (2), when the fire extinguishing fitting is assembled, can be removed from the water inlet end (11) or the water outlet end (12) and inserted into it.

2. Fire extinguishing fitting according to claim 1, characterized in that the water outlet end (12) is designed as an open jet end for producing a water jet to form a jet pipe (10).

3. Fire extinguishing fitting according to one of claims 1 or 2, characterized in that the insert (3) is inserted into the water inlet end (11) and / or the water outlet end (12) without a further casing tube surrounding the insert (3).

4. Fire extinguishing fitting according to one of claims 1 to 3, characterized in that the solid wetting agent holder (2) is formed solely by the insert (3), which is in particular manufactured in one piece.

5. Fire extinguishing fitting according to one of claims 1 to 4, characterized in the insert has a plurality of webs (5) spaced apart from each other in the circumferential direction of the inner receiving space (4), which extend in the flow direction of the extinguishing water flow through the water passage (13) and delimit the inner receiving space (4) at its outer circumference.

6. Fire extinguishing fitting according to claim 5, characterized in that the webs (5) are connected to one another in a form-fitting, material-locking and / or force-locking manner at least at a first axial end (6) and end freely at a second axial end (7) facing away from the first axial end (6) and, in particular, have a deflection radially inwards.

7. Solid wetting agent holder (2) for use in a fire extinguishing fitting according to one of claims 1 to 6; having an insert (3) which can be flushed with extinguishing water and which has an inner receiving space (4) for receiving a solid wetting agent (1) and is designed to be inserted directly and free of an enclosing casing tube into a water inlet end (11) or water outlet end (12) of the fire extinguishing fitting or fire extinguishing coupling, characterized in that the insert (3) has a plurality of webs (5) spaced apart from each other in the circumferential direction of the inner receiving space (4), which extend in the longitudinal direction of the inner receiving space (4) and delimit the latter at its outer circumference; wherein the webs (5) are connected to one another at a first axial end (6) in a form-fitting, material-locking and / or force-locking manner and end freely at a second axial end (7) facing away from the first axial end (6).

8. Solid wetting agent holder (2) according to claim 7, characterized in that the solid wetting agent holder (2) is formed solely by the insert (3), which is in particular manufactured in one piece.

9. Solid wetting agent holder (2) according to one of claims 7 or 8, characterized in that the webs (5) at the second axial end (7) have a deflection radially inward.

10. Solid wetting agent holder (2) according to one of claims 7 to 9, characterized in that the webs (5) at their second axial end (7) and in particular with their entire axial section extending from the first axial end (6) to the second axial end (7) are radially deformable and / or tiltable relative to each other in order to enable a solid wetting agent (1) to be inserted via the second axial end (7) into the inner receiving space (4) and, in the inserted state of the solid wetting agent (1), to surround it in a form-fitting manner with the second axial end (7).

11. Solid wetting agent holder (2) according to one of claims 7 to 10, characterized in that the webs (5) are connected to each other exclusively at the first axial end (6).

12. Solid wetting agent holder (2) according to one of claims 7 to 11, characterized in that the webs (5) have a radially outwardly open indentation (9) at their second axial end (7) to form a grip element.

13. Solid wetting agent holder (2) according to one of claims 7 to 12, characterized in that the insert (3) has at least one pin or core element (16) for pressing or embedding into the solid wetting agent (1).

14. Solid wetting agent holder (2) according to one of claims 7 to 13, characterized in that the solid wetting agent holder (2) receives the solid wetting agent (1) removably from the receiving space (4).