Foam hook pipe device capable of switching middle and low foaming times

Abstract

The utility model discloses a middle-low foaming multiple switchable foam hook pipe device which comprises an inlet pipe weldment, a foam outlet pipe assembly and a switching valve assembly, and the inlet pipe weldment and the foam outlet pipe assembly form a coaxial different-hole structure through the switching valve assembly. The fire-fighting quick-insertion internal thread connector is positioned at the upper end of the inlet pipe weldment; the hook pipe weldment is connected with the foam outlet pipe assembly to form a hook-shaped structure, and the tail end of the hook pipe weldment is fixed with the tail section of the hook pipe through a butterfly bolt; the switching valve assembly comprises a valve shell, a valve plate, a valve gland, a valve handle, an internal thread ball valve and a quick-assembly external thread flat connector, the valve plate is located in a cavity formed by the valve gland and the valve shell, and a plurality of inner through holes and a plurality of outer through holes are formed in the valve plate. According to the utility model, the foam suction area is increased, and a secondary impact pore plate structure with coaxial different holes is designed by utilizing a foam impact secondary foaming principle, so that the problems of low foaming times, unstable foaming and incapability of adjusting the foaming times when a foam hook pipe is used for fire extinguishing of a fire dike oil pool are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting equipment, in particular to a foam hook tube device with switchable medium and low foaming multiples. Background Art

[0002] The foam hook pipe is a mobile foam fire-fighting equipment used to produce and spray air foam to extinguish oil and gasoline fires in underground, semi-underground and small oil tanks where there are no fixed foam fire-fighting devices.

[0003] In the prior art, the double-outlet short foam hook pipe provided by CN215387230U can be installed on a high-rise fire truck or directly connected to a fire hose. Both liquid outlets can emit medium-multiple foam. The short foam hook pipe realizes the function of the existing conventional long foam hook pipe, greatly improving the fire extinguishing efficiency. It is suitable for large tank fire extinguishing, especially for emitting foam from the top of the tank downward. It has good stability and does not have the problem of foam hook pipe swinging. CN117462878A provides a tank submerged foam fire extinguishing system to solve the problem that the existing tank submerged foam fire extinguishing device cannot fully cover the liquid surface, avoid the violent stirring caused by the foam being released directly in the oil layer when the foam flow is sprayed, eliminate the fire extinguishing blind spot in the tank, and realize accurate fire extinguishing of the ignition liquid surface of the tank. CN214435975U provides a foam hook pipe fixing device for oil tank cofferdams, which can adjust the clamping device according to the height and width of different oil tank cofferdams to ensure that the foam hook pipe does not fall off under different pressure conditions, has certain reliability and flexibility, and solves the problems of low foaming multiple, low fire extinguishing efficiency and manual fixation of existing foam hook pipes. However, it is urgent to develop a foam hook pipe for firebreak fire extinguishing to solve the problems of low foaming multiple, unstable foaming and unadjustable foaming multiple when the foam hook pipe is used for firebreak oil pool fire extinguishing. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art of using foam hook tubes for fire extinguishing in oil pools on firebreaks, the purpose of the utility model is to provide a foam hook tube device with switchable medium and low foaming multiples, by increasing the foam suction area and utilizing the principle of secondary foaming by foam impact, to design a secondary impact orifice plate structure with coaxial and different holes.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A foam hook-tube device with switchable medium and low foaming multiples, comprising:

[0007] An inlet pipe weldment, a foam outlet pipe assembly and a switching valve assembly, wherein the inlet pipe weldment and the foam outlet pipe assembly form a coaxial different-hole structure through the switching valve assembly;

[0008] It also includes a fire-fighting quick-insert internal thread connector, which is located at the upper end of the pipe inlet weldment;

[0009] It also includes a hook pipe weldment, which is connected to the foam outlet pipe assembly and is a hook-shaped structure, the end of which is fixed to the hook pipe tail section by a butterfly bolt;

[0010] The switching valve assembly comprises a valve housing, a valve plate, a valve gland, a valve handle, an inner thread ball valve and a quick-install outer thread flat joint, wherein the valve plate is located in a cavity formed by the valve gland and the valve housing, and is provided with a plurality of inner through holes and outer through holes respectively;

[0011] When the foam liquid passes through the inner through hole at the bottom of the switching valve assembly, the low-expansion foam suction port is used to perform negative pressure suction of the venturi tube, and the low-expansion foam is discharged through the low-expansion foam cavity outlet;

[0012] When the foam liquid passes through the outer through hole at the bottom of the switching valve assembly, negative pressure suction is performed using the medium-fold foam air suction port, and the medium-fold foam is generated through secondary impact of the medium-fold foam orifice plate.

[0013] Preferably, the fire-fighting quick-plug internal thread connector is fixed to the upper end of the pipe inlet weldment by a flat washer.

[0014] Preferably, the switching valve assembly is fixedly connected to the pipe inlet weldment and the foam pipe outlet assembly by a plurality of evenly arranged hexagon socket head screws.

[0015] Preferably, the inlet pipe weldment is quickly fixed by a quick-release external thread flat joint at the upper end of the switching valve assembly.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model proposes a foam hook tube device with switchable medium and low foaming multiples. By increasing the foam suction area and utilizing the principle of secondary foaming by foam impact, a secondary impact orifice plate structure with coaxial and different holes is designed. It has good reliability and flexibility for firefighting at firebreaks, and can effectively solve the problems of low foaming multiple, unstable foaming and unadjustable foaming multiple in the prior art when the foam hook tube is used for firefighting at firebreak oil pools. The utility model has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a foam hook-tube device with switchable low and medium foaming multiples in the embodiment;

[0019] Figure 2 for Figure 1 Side view of the mid-foam hook-and-tube device;

[0020] Figure 3 for Figure 1 A front view of the mid-foam hook-tube device;

[0021] Figure 4 for Figure 1A schematic diagram of the structure of the switching valve assembly;

[0022] Figure 5 for Figure 1 A cross-sectional view of the switching valve assembly;

[0023] Figure 6 for Figure 1 A front view of the switching valve assembly;

[0024] The accompanying drawings are marked as follows: 1 switching valve assembly; 3 hexagon socket head screw; 4 foam outlet pipe assembly; 5 pipe inlet weldment; 6 fire quick-connect internal thread joint; 7 hook pipe weldment; 8 hook pipe tail section; 9 butterfly bolt; 101 valve housing; 102 valve plate; 103 valve gland; 104 valve handle; 105 internal thread ball valve; 106 quick-install external thread flat joint. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] like Figures 1 to 6 As shown, a foam hook pipe device with a medium and low foaming multiple switchable is exemplarily described, comprising an inlet pipe weldment 5, a foam outlet pipe assembly 4 and a switching valve assembly 1, wherein the inlet pipe weldment 5 and the foam outlet pipe assembly 4 form a coaxial different-hole structure through the switching valve assembly 1;

[0027] It also includes a fire-fighting quick-insert female thread connector 6, which is located at the upper end of the pipe inlet weldment 5;

[0028] It also includes a hook pipe weldment 7, which is connected to the foam outlet pipe assembly 4 and is a hook-shaped structure, and the end is fixed to the hook pipe tail section 8 by a butterfly bolt 9;

[0029] The switching valve assembly 1 comprises a valve housing 101, a valve plate 102, a valve gland 103, a valve handle 104, an inner thread ball valve 105 and a quick-install outer thread flat joint 6, wherein the valve plate 102 is located in a cavity formed by the valve gland 103 and the valve housing 101, and is provided with a plurality of inner through holes and outer through holes;

[0030] When the foam liquid passes through the inner through hole at the bottom of the switching valve assembly 1, the low-multiple foam suction port is used to perform negative pressure suction of the Venturi tube, and low-multiple foam is emitted through the low-multiple foam cavity outlet;

[0031] When the foam liquid passes through the outer through hole at the bottom of the switching valve assembly 1, negative pressure suction is performed using the medium-multiple foam suction port, and medium-multiple foam is emitted through secondary impact of the medium-multiple foam orifice plate.

[0032] In some embodiments, the fire-fighting quick-connect female connector 6 is fixed to the upper end of the pipe inlet weldment 5 by a flat washer.

[0033] In some embodiments, the switching valve assembly 1 is fixedly connected to the pipe inlet weldment 5 and the foam pipe outlet assembly 4 by a plurality of evenly arranged hexagon socket head screws 3 .

[0034] In some embodiments, the inlet weldment 5 is quickly fixed by a quick-install male thread flat connector 106 at the upper end of the switching valve assembly 1 .

[0035] When the above-mentioned foam hook tube device with switchable medium and low foaming multiples is working, the foam hook tube is fixed on the firebreak, and the flow control valve can control the flow of the mixed foam liquid. The mixed foam liquid flows through the above-mentioned foam hook tube device with switchable medium and low foaming multiples through the pipeline, and uses the principle of coaxial different holes, with 4 holes inside and 4 holes outside. When the foam hook tube needs to produce low-multiple foam, the foam liquid passes through the 4 holes inside the foam hook tube device, and uses the low-multiple foam air intake port to perform venturi tube negative pressure suction, and emits low-multiple foam through the outlet of the low-multiple foam cavity. When the foam hook tube needs to produce medium-multiple foam, the foam liquid passes through the 4 holes outside the foam hook tube device, and uses the medium-multiple foam air intake port to perform negative pressure suction, and emits medium-multiple foam through secondary impact of the medium-multiple foam orifice plate. By increasing the foam suction area and using foam impact secondary foaming, the low and medium foaming multiples of fire extinguishing in the firebreak can be flexibly adjusted.

[0036] In summary, the medium foam hook tube device of the utility model can switch between medium and low foaming multiples. By increasing the foam suction area and utilizing the principle of secondary foaming due to foam impact, a secondary impact orifice plate structure with coaxial and different holes is designed, which has good reliability, flexibility and practicality for fire extinguishing in firebreaks.

[0037] The above is a preferred embodiment of the utility model, but the utility model should not be limited to the content disclosed in the embodiment. Therefore, any equivalent or modification completed without departing from the spirit disclosed in the utility model shall fall within the scope of protection of the utility model.

Claims

1. A foam hook-tube device with switchable medium and low foaming multiples, characterized in that: include: An inlet pipe weldment, a foam outlet pipe assembly and a switching valve assembly, wherein the inlet pipe weldment and the foam outlet pipe assembly form a coaxial different-hole structure through the switching valve assembly; It also includes a fire-fighting quick-insert internal thread connector, which is located at the upper end of the pipe inlet weldment; It also includes a hook pipe weldment, which is connected to the foam outlet pipe assembly and is a hook-shaped structure, the end of which is fixed to the hook pipe tail section by a butterfly bolt; The switching valve assembly comprises a valve housing, a valve plate, a valve gland, a valve handle, an inner thread ball valve and a quick-install outer thread flat joint, wherein the valve plate is located in a cavity formed by the valve gland and the valve housing, and is provided with a plurality of inner through holes and outer through holes respectively; When the foam liquid passes through the inner through hole at the bottom of the switching valve assembly, the low-expansion foam is produced by using the low-expansion foam suction port to perform negative pressure suction through the venturi tube; When the foam liquid passes through the outer through hole at the bottom of the switching valve assembly, negative pressure suction is performed using the medium-multiple foam air suction port, and medium-multiple foam is emitted through secondary impact of the medium-multiple foam orifice plate.

2. The foam hook-tube device with switchable medium and low foaming multiples according to claim 1, characterized in that: The fire-fighting quick-plug internal thread joint is fixed to the upper end of the pipe inlet weldment through a flat washer.

3. The foam hook-tube device with switchable medium and low foaming multiples according to claim 1, characterized in that: The switching valve assembly is fixedly connected to the pipe inlet weldment and the foam pipe outlet assembly through a plurality of evenly arranged hexagon socket cylindrical head screws.

4. The foam hook-tube device with switchable medium and low foaming multiples according to claim 1, characterized in that: The pipe inlet weldment is quickly fixed by a quick-install external thread flat joint at the upper end of the switching valve assembly.

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