Fixed and movable combined foam fire extinguishing equipment

Abstract

The utility model discloses fixed and movable combined foam fire extinguishing equipment which comprises a handheld water outlet pipe group module, the water outlet pipe group module comprises a water hose adapter, an overflowing pipeline, a foam rod barrel and a water outlet pipe section which are sequentially communicated along the water outlet direction, and the water hose adapter is used for being detachably butted with a water hose; the water outlet pipe section is of a round pipe structure, an inner cavity of the water outlet pipe section is divided into a reducing pipe cavity, an expansion area and a water outlet cavity which are sequentially communicated in the water outlet direction, the pipe diameter of the reducing pipe cavity in the water outlet direction is reduced gradually, the expansion area and the water outlet cavity are cylindrical cavities, and the pipe diameter of the expansion area is larger than that of the water outlet end of the reducing pipe cavity. The water outlet pipe section is provided with a plurality of air suction holes evenly distributed in the circumferential direction of the water outlet pipe section and communicated with the expansion area, the pipe diameter of the water outlet cavity is smaller than that of the expansion area, and an outlet of the water outlet cavity is a water outlet of the water outlet pipe section. By adopting the scheme of the utility model, the problems of low efficiency and short foam duration of A-type fire extinguishing equipment for high-rise buildings are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting equipment, in particular to a fixed-movable combined foam fire extinguishing device. Background Art

[0002] According to the current status of Class A fire extinguishing methods for high-rise building fires, fire rescue personnel generally choose a combination of fixed and mobile fire extinguishing methods. The combination of fixed and mobile fire extinguishing methods requires a long fire extinguishing time. According to the survey, three foam mixing methods, namely negative pressure foam proportion mixing, foam rod mixing, and self-priming mixing, are selected for the combination of fixed and mobile fire extinguishing.

[0003] After analyzing the three foam mixing methods at home and abroad, namely, negative pressure foam proportion mixing, foam rod mixing, and self-priming mixing, it was found that the mixing ratio of the other two methods except foam rod mixing is adjustable, and the minimum mixing ratio can reach 0.1%. The negative pressure foam proportion mixing device requires firefighters to carry a large amount of foam stock liquid, which is not conducive to firefighters' light fire fighting operations at high-rise buildings. Although the self-priming mixing fire extinguishing device is small in size and easy to carry, the fire extinguishing time can only be maintained for 6 minutes, and the fire extinguishing efficiency is low. Through comparative analysis of the advantages and disadvantages of the three foam mixing methods, the foaming method using foam rod mixing meets the needs of high-rise mobile and light fire fighting (long foam duration, inlet pressure of 0.3MPa, and low foam mixing ratio).

[0004] Therefore, it has become an urgent technical direction to expand the foaming method of foam rod mixing by testing, comparing, improving and optimizing research, and developing a lightweight foam fire extinguishing device with a low foam mixing ratio and a long foam mixing working time to solve the problems of low efficiency and short foam duration of Class A fire extinguishing equipment used in high-rise buildings. Utility Model Content

[0005] The utility model aims to provide a fixed and mobile combined foam fire extinguishing device to solve the problems of low efficiency and short foam duration of Class A fire extinguishing equipment used in high-rise buildings.

[0006] The purpose of the utility model is achieved as follows: a fixed-movable combined foam fire extinguishing equipment, which includes a hand-operated water outlet pipe group module, the water outlet pipe group module includes a water hose adapter, a flow pipe, a foam rod tube, and a water outlet pipe section that are sequentially connected along the water outlet direction, the water hose adapter is used to be detachably connected to the water hose; the water outlet pipe section is a circular tube structure, and its inner cavity is divided into a tapered tube cavity, an expansion zone, and a water outlet cavity that are sequentially connected along the water outlet direction, the diameter of the tapered tube cavity gradually decreases along the water outlet direction, the expansion zone and the water outlet cavity are both cylindrical cavities, the diameter of the expansion zone is larger than the diameter of the water outlet end of the tapered tube cavity, the water outlet pipe section is provided with a plurality of suction holes evenly distributed along its circumference and connected to the expansion zone, the diameter of the water outlet cavity is smaller than the diameter of the expansion zone, and the outlet of the water outlet cavity is the water outlet of the water outlet pipe section.

[0007] The beneficial effects of the utility model are:

[0008] When the above-mentioned water outlet pipe section is in use, the water flows first through the tapered pipe cavity, so that the water flows toward the center and accelerates the flow rate. When the water flows into the expansion area, negative pressure is formed at the position of the air intake hole, allowing outside air to enter the expansion area, making the foaming effect better, so that the water flow can be ejected through the water outlet cavity faster, so as to solve the problems of low efficiency and short foam duration of Class A fire extinguishing equipment used in high-rise buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a stereogram of the utility model.

[0010] Figure 2 It is a side view of the utility model.

[0011] Figure 3 yes Figure 2 AA section view in.

[0012] Figure 4 It is a structural diagram of the rectifier.

[0013] Explanation of the reference numerals: 1-water outlet pipe section; 11-water outlet cavity; 12-expansion area; 13-air suction hole; 14-tapered tube cavity; 2-docking screw sleeve; 3-foam rod tube; 4-rectifier; 4a-center sleeve; 4b-side plate; 5-flow pipe; 6-valve; 7-water hose adapter. DETAILED DESCRIPTION

[0014] The following will be combined with the attached embodiment of the utility model Figure 1-4 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] like Figure 1-2 As shown, a fixed-removable foam fire extinguishing equipment includes a hand-operated water outlet pipe group module, the water outlet pipe group module includes a water hose adapter 7, a flow pipe 5, a foam rod tube 3, and a water outlet pipe section 1 that are sequentially connected along the water outlet direction. The water hose adapter 7 is used to detachably dock with the water hose to connect the fire water body / liquid. The flow pipe 5 is equipped with a manually operable valve 6 for opening and closing the waterway. The water hose adapter 7, the flow pipe 5, the foam rod tube 3, and the water outlet pipe section 1 are coaxially arranged, and the flow pipe 5, the foam rod tube 3, and the water outlet pipe section 1 are all circular tube structures. The water hose adapter 7 (conventional component) presents a hollow rotating body structure.

[0016] like Figure 3 As shown, the above-mentioned water outlet pipe section 1 is a circular tube structure, and its inner cavity is divided into a tapered tube cavity 14, an expansion zone 12, and a water outlet cavity 11 which are connected in sequence along the water outlet direction, which is equivalent to a Venturi tube. The diameter of the tapered tube cavity 14 gradually decreases along the water outlet direction, and the wall of the tapered tube cavity 14 is a smoothly transitioned curved surface, or is in the shape of a cone. The expansion zone 12 and the water outlet cavity 11 are both cylindrical cavities, and the diameter of the expansion zone 12 is larger than the diameter of the water outlet end of the tapered tube cavity 14. The water outlet pipe section 1 is provided with a plurality of suction holes 13 evenly distributed along its circumference and connected with the expansion zone 12. The suction holes 13 are relatively close to the water outlet of the tapered tube cavity 14, the diameter of the water outlet cavity 11 is smaller than the diameter of the expansion zone 12, and the outlet of the water outlet cavity 11 is the water outlet of the water outlet pipe section 1.

[0017] The above-mentioned water outlet pipe section 1 adopts the Venturi tube principle. When in use, the water flow first passes through the tapered tube cavity 14, so that the water flow gathers toward the center and accelerates the flow rate. When the water flow enters the expansion area 12, a negative pressure is formed at the position of the air intake hole 13, so that the outside air enters the expansion area 12, and the foam and air are fully mixed, so that the foaming effect is better, so that the water flow can be ejected through the water outlet cavity 11 faster, so as to solve the problems of low efficiency and short foam duration of Class A fire extinguishing equipment used in high-rise buildings.

[0018] As a preferred embodiment, in order to facilitate the connection of the water outlet pipe section 1, the water outlet end of the above-mentioned foam rod tube 3 is fixedly sleeved with a round sleeve-shaped docking screw sleeve 2, the outer side of the water outlet end of the docking screw sleeve 2 has an external thread structure, and the water inlet of the water outlet pipe section 1 has an internal thread structure. The external thread structure of the docking screw sleeve 2 cooperates with the internal thread structure of the water outlet pipe section 1 to make the water outlet pipe section 1 threadedly connected with the docking screw sleeve 2, and the inner cavity of the foam rod tube 3, the inner cavity of the docking screw sleeve 2, and the tapered tube cavity 14 are connected in sequence.

[0019] As a preferred embodiment, the foam rod tube 3 is a cylindrical structure, and the inner diameter of the foam rod tube 3, the inner diameter of the docking screw sleeve 2, and the inner diameter of the water inlet end of the tapered tube cavity 14 decrease in sequence.

[0020] As a preferred embodiment, Figure 2 As shown, in order to stabilize the water flow, a rectifier 4 for preventing turbulence is fixed in the inner cavity of the foam rod tube 3, which can prevent turbulence and achieve a better foaming effect.

[0021] As a preferred embodiment, Figure 2 , 4As shown, the rectifier 4 is formed integrally by a center sleeve 4a and a plurality of side plates 4b uniformly distributed along the circumference of the center sleeve 4a. The center sleeve 4a is set as a circular sleeve that passes through the front and back, and the side plates 4b are fixedly connected to the inner wall of the foam rod tube 3. The center sleeve 4a is coaxially arranged with the foam rod tube 3. Before the water flow enters the outlet pipe section 1, the water flow passes through the rectifier 4. The center sleeve 4a and the plurality of circumferentially uniformly distributed side plates 4b are used to divide the water flow into a middle mainstream (formed by the center sleeve 4a) and a plurality of circumferentially uniformly distributed side plates 4b (formed by adjacent two side plates 4b). The plurality of side plates can be gathered with the middle mainstream in the tapered tube cavity 14 to fully ensure the stability of the water flow.

[0022] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model; in the present utility model, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in the present utility model can be understood according to the specific circumstances.

[0023] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fixed-mobile combined foam fire extinguishing equipment, comprising a hand-operated water outlet pipe module, characterized in that: The water outlet pipe assembly module comprises a water hose adapter (7), a flow pipe (5), a foam rod tube (3), and a water outlet pipe section (1) which are sequentially connected along the water outlet direction, and the water hose adapter (7) is used for detachably docking with the water hose; The water outlet pipe section (1) is a circular tube structure, and its inner cavity is divided into a gradually contracting tube cavity (14), an expansion zone (12), and a water outlet cavity (11) which are connected in sequence along the water outlet direction. The diameter of the gradually contracting tube cavity (14) gradually decreases along the water outlet direction. The expansion zone (12) and the water outlet cavity (11) are both cylindrical cavities. The diameter of the expansion zone (12) is larger than the diameter of the water outlet end of the gradually contracting tube cavity (14). The water outlet pipe section (1) is provided with a plurality of air suction holes (13) evenly distributed along its circumference and connected to the expansion zone (12). The diameter of the water outlet cavity (11) is smaller than the diameter of the expansion zone (12). The outlet of the water outlet cavity (11) is the water outlet of the water outlet pipe section (1).

2. The fixed-mobile combined foam fire extinguishing equipment according to claim 1, characterized in that: The water outlet end of the foam rod barrel (3) is fixedly sleeved with a circular sleeve-shaped docking screw sleeve (2); the outer side of the water outlet end of the docking screw sleeve (2) has an external thread structure; the water inlet of the water outlet pipe section (1) has an internal thread structure; the external thread structure of the docking screw sleeve (2) cooperates with the internal thread structure of the water outlet pipe section (1) so that the water outlet pipe section (1) and the docking screw sleeve (2) are threadedly connected; the inner cavity of the foam rod barrel (3), the inner cavity of the docking screw sleeve (2), and the tapered pipe cavity (14) are sequentially connected.

3. The fixed-mobile combined foam fire extinguishing equipment according to claim 2, characterized in that: The foam rod barrel (3) is a cylindrical structure, and the inner diameter of the foam rod barrel (3), the inner diameter of the docking screw sleeve (2), and the inner diameter of the water inlet end of the tapered tube cavity (14) decrease in sequence.

4. The fixed-mobile combined foam fire extinguishing equipment according to claim 3, characterized in that: A rectifier (4) for preventing turbulence is fixed in the inner cavity of the foam rod tube (3).

5. The fixed-mobile combined foam fire extinguishing equipment according to claim 4, characterized in that: The rectifier (4) is formed integrally from a central sleeve (4a) and a plurality of side panels (4b) evenly distributed along the outer circumference of the central sleeve (4a); the central sleeve (4a) is configured as a circular sleeve that penetrates from front to back, and the side panels (4b) are fixedly connected to the inner wall of the foam rod tube (3).

6. The fixed-mobile combined foam fire extinguishing equipment according to claim 5, characterized in that: The central sleeve (4a) is coaxially arranged with the foam rod tube (3).

7. The fixed-mobile combined foam fire extinguishing equipment according to claim 1, characterized in that: The flow pipe (5) is equipped with a manually operable valve (6).

8. A fixed-mobile combined foam fire extinguishing equipment according to any one of claims 1 to 7, characterized in that: The water hose adapter (7), the flow pipe (5), the foam rod tube (3), and the water outlet pipe section (1) are coaxially arranged.

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