Nozzle suitable for perfluorohexanone portable fire extinguisher

Abstract

The nozzle comprises a connecting pipe and a rotary core arranged in the connecting pipe, a nozzle body is detachably arranged at an end opening in a cavity of the connecting pipe, an inner cavity of the nozzle body is composed of a first cavity and a second cavity which are communicated with each other, the rotary core is arranged in the second cavity, and the first cavity and the second cavity are communicated with each other. The diameter of the end, communicated with the second cavity, of the first cavity is smaller than that of the other end of the first cavity. The nozzle is simple in structure, the nozzle body is convenient to replace through the arrangement of the internal threads and the external threads on the connecting pipe and the nozzle body, the sealing performance of the connecting pipe and the nozzle body is improved under the action of the sealing ring, meanwhile, the nozzle is applied to a portable perfluorohexanone fire extinguisher, and compared with a common straight-through type nozzle, the nozzle has the advantages of being simple in structure and convenient to use. The outlet speed of the rotary core nozzle is higher, the speed distribution is more uniform, the spraying distance is farther, the atomization effect and the fire extinguishing effect are better, and the better atomization effect can be achieved especially for a perfluorohexanone fire extinguishing agent.

Description

Technical Field

[0001] The utility model relates to the technical field of perfluorohexanone portable fire extinguishers, in particular to a nozzle suitable for perfluorohexanone portable fire extinguishers. Background Art

[0002] Portable fire extinguishers are often used in local applications in open spaces. Especially for the extinguishing agent perfluorohexanone, the spray angle, spray speed and atomization effect are critical when it is sprayed from the nozzle, which directly affects the fire extinguishing time and effect.

[0003] The existing perfluorohexanone portable fire extinguisher nozzles on the market still use traditional simple water-based fire extinguisher nozzles. The traditional nozzle structure can basically meet the requirements for simple water-based fire extinguishers, but when used for more efficient perfluorohexanone fire extinguishing agent extinguishing, the extinguishing agent is directly ejected from the nozzle hole, the injection angle is not suitable, the fire extinguishing range is limited, and the fire extinguishing effect is not good, which is difficult to meet the requirements. Therefore, a nozzle suitable for perfluorohexanone portable fire extinguisher is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a nozzle suitable for a perfluorohexanone portable fire extinguisher to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nozzle suitable for a perfluorohexanone portable fire extinguisher, comprising a connecting pipe and a rotating core arranged in the connecting pipe, wherein a nozzle body is detachably mounted at a port inside the connecting pipe cavity, wherein the inner cavity of the nozzle body is composed of a first cavity and a second cavity interconnected with each other, the rotating core is arranged inside the second cavity, and the diameter of the end portion where the first cavity is connected to the second cavity is smaller than the diameter of the end portion at the other end of the first cavity.

[0006] As a further solution of the utility model: the interior of the connecting pipe is set as a first cavity, the inner wall of the first cavity in contact with the nozzle body is provided with an internal thread, and the circumferential outer wall of the nozzle body is provided with an external thread, and the internal and external threads are adapted to each other.

[0007] As a further solution of the utility model: a limiting groove is annularly provided on the circumferential outer side wall of the nozzle body, and a sealing ring is provided in the limiting groove.

[0008] As a further solution of the utility model: the sealing ring is made of nitrile rubber.

[0009] As a further solution of the utility model: at least one straight channel is provided through the end surface of the rotary core, and a plurality of spiral channels are opened on the rotary core, and the plurality of spiral channels are distributed circumferentially on the outer side wall of the rotary core.

[0010] As a further solution of the utility model: the connecting pipe, the nozzle body and the rotating core are all made of stainless steel.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a novel structure, and the nozzle body can be easily replaced by arranging the internal and external threads on the connecting pipe and the nozzle body. Secondly, under the action of the sealing ring, the sealing performance of both the connecting pipe and the nozzle body is improved. At the same time, the nozzle is applied to a perfluorohexanone portable fire extinguisher. Compared with an ordinary straight-through nozzle, the spiral core nozzle has a larger outlet velocity, a more uniform velocity distribution, a longer spraying distance, and better atomization effect and fire extinguishing effect. Especially for perfluorohexanone fire extinguishing agent, a better atomization effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the nozzle of the utility model;

[0013] Figure 2 It is a schematic cross-sectional view of the nozzle of the utility model;

[0014] Figure 3 It is a schematic diagram of the rotary core of the utility model;

[0015] In the figure: 1, connecting pipe; 11, first cavity; 2, nozzle body; 21, first cavity; 22, second cavity; 3, rotating core; 31, straight channel; 32, spiral channel; 4, sealing ring. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to 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 the embodiments. Based on the embodiments in 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.

[0017] Compared with the patent "A swirl-type liquid fire extinguishing agent nozzle and fire extinguisher", the nozzle of this application is structurally composed of a nozzle body, a swirl core body and a swirl core combination. The first cavity inside the nozzle body has a certain function of limiting the flow rate, while the nozzle of this application only borrows the swirl-type centrifugal atomization mechanism and improves on this structure to adjust the angle of the nozzle outlet so that the sprayed fire extinguishing agent has a wider coverage range and is more suitable for use in portable fire extinguishers; essentially, it is only composed of the nozzle body and the internal swirl core, and the structure of the connecting pipe only has the function of guiding the flow and better connecting the nozzle body with the portable fire extinguisher. At the same time, perfluorohexanone portable fire extinguishers have different specifications, ranging from as small as 2kg to as large as 8kg or even more. A nozzle body with a single structure is not suitable for fire extinguishers of different specifications. Often large-sized fire extinguishers require nozzle bodies with larger flow rates and spray angles to have better fire extinguishing effects.

[0018] See also Figure 1-3 In an embodiment of the utility model, a nozzle suitable for a perfluorohexanone portable fire extinguisher includes a connecting pipe 1 and a swirl core 3 arranged in the connecting pipe 1. A nozzle body 2 is detachably mounted at the port inside the cavity of the connecting pipe 1. The inner cavity of the nozzle body 2 is composed of a first cavity 21 and a second cavity 22 that are interconnected. The swirl core 3 is arranged inside the second cavity 22, and the diameter of the end portion where the first cavity 21 and the second cavity 22 are connected is smaller than the diameter of the end portion of the other end of the first cavity 21.

[0019] Specifically, the connecting pipe 1, the nozzle body 2 and the swirl core 3 are all made of stainless steel, the second cavity 22 is a columnar cavity, and the first cavity 21 is a trumpet-shaped cavity, and under the action of the first cavity 21, the spray angle of the fire extinguisher can be increased, and the fire extinguishing coverage area of ​​perfluorohexanone can be increased. Secondly, the columnar cavity is convenient for fixing the swirl core 3, and the swirl core 3 forms a straight channel 31 and a spiral channel 32 inside the columnar cavity. In the spiral channel 32, the perfluorohexanone fire extinguishing agent uses centrifugal force and aerodynamic force to rub with the surrounding air at a very high speed and separate and atomize; in the straight channel 31, the liquid fire extinguishing agent can ensure the flow rate; then the perfluorohexanone fire extinguishing agent passing through the straight channel 31 and the spiral channel 32 converges at the nozzle mouth and is sprayed out from the fire extinguisher while ensuring the speed and atomization rate.

[0020] See also Figure 1-2In one embodiment, in this embodiment, preferably, the interior of the connecting pipe 1 is set as a first cavity 11, and the perfluorohexanone fire extinguishing agent enters the nozzle body 2 from the first cavity 11 inside the connecting pipe 1. The inner wall of the first cavity 11 in contact with the nozzle body 2 is provided with an internal thread, and the circumferential outer wall of the nozzle body 2 is provided with an external thread, and the internal and external threads are adapted to each other. Further, under the premise of limiting the axial rotation of the connecting pipe 1, the nozzle body 2 is rotated to complete the disassembly or fixation of the nozzle body 2. Similarly, under the premise of limiting the axial rotation of the nozzle body 2, the connecting pipe 1 can also be rotated to complete the disassembly or fixation of the nozzle body 2.

[0021] See also Figure 1-2 In one embodiment, in this embodiment, preferably, a limiting groove is annularly provided on the circumferential outer wall of the nozzle body 2, and a sealing ring 4 is provided in the limiting groove. Furthermore, the sealing ring 4 is made of nitrile rubber and is installed in the limiting groove of the nozzle opening 21 so that the connecting pipe 1 and the nozzle body 2 have good sealing properties.

[0022] See also Figure 3 In one embodiment, in this embodiment, preferably, at least one straight channel 31 is provided through the end surface of the rotary core 3. In this embodiment, preferably, the number of the straight channel 31 is one, and a plurality of spiral channels 32 are provided on the rotary core 3, and the plurality of spiral channels 32 are circumferentially distributed on the outer side wall of the rotary core 3. In this embodiment, preferably, the number of the spiral channels 32 is four, and the four spiral channels 32 are equidistantly distributed on the circumferential outer side wall of the rotary core 3.

[0023] The rotating liquid generated by the swirl core 3 in the nozzle body 2 is accelerated to spray out a hollow diffusion cone-shaped liquid film through the nozzle opening 21 channel, and is broken and atomized by using the speed difference between the liquid and the external air. The centrifugal atomization mechanism is related to the cone angle of the swirl chamber, the depth of the nozzle hole, and the size of the swirl chamber. After the liquid flows through the swirl core 3, a vortex is formed on the inner wall of the nozzle body 2 to buffer and ensure the spray mist angle; if the swirl core 3 is pressed to the bottom, the mist angle will be restricted and the flow will be limited.

[0024] The working principle and use process of the utility model are as follows: when the perfluorohexanone fire extinguishing agent enters the nozzle body 2 through the first cavity 11 in the connecting pipe 1 under pressure, it first passes through the straight channel 31 and the spiral channel 32 of the rotary core 3. In the spiral channel 32, the perfluorohexanone fire extinguishing agent rubs with the surrounding air at a very high speed with the help of centrifugal force and aerodynamic force to separate and atomize; in the straight channel 31, the liquid fire extinguishing agent can ensure the flow rate; then the perfluorohexanone fire extinguishing agent passing through the straight channel 31 and the spiral channel 32 converges at the nozzle mouth and is sprayed out from the fire extinguisher while ensuring the speed and atomization rate. When it is necessary to replace the nozzle body 2 or the connecting pipe 1, the nozzle body 2 or the connecting pipe 1 is rotated to complete the replacement of the nozzle body 2 or the connecting pipe 1.

[0025] Although this specification is described according to implementation modes, not every implementation mode includes 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.

[0026] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A nozzle suitable for a perfluorohexanone portable fire extinguisher, characterized in that: The invention comprises a connecting pipe (1) and a swirl core (3) arranged in the connecting pipe (1); a nozzle body (2) is detachably mounted at a port inside a cavity of the connecting pipe (1); the inner cavity of the nozzle body (2) is composed of a first cavity (21) and a second cavity (22) which are interconnected; the swirl core (3) is arranged inside the second cavity (22); and the diameter of the end portion where the first cavity (21) and the second cavity (22) are connected is smaller than the diameter of the end portion of the other end of the first cavity (21).

2. The nozzle suitable for perfluorohexanone portable fire extinguisher according to claim 1, characterized in that: The interior of the connecting pipe (1) is configured as a first cavity (11), the inner wall of the first cavity (11) in contact with the nozzle body (2) is provided with an internal thread, and the circumferential outer wall of the nozzle body (2) is provided with an external thread, and the internal and external threads are matched.

3. The nozzle suitable for perfluorohexanone portable fire extinguisher according to claim 1, characterized in that: The nozzle body (2) has an annular limiting groove formed on the circumferential outer wall thereof, and a sealing ring (4) is provided in the limiting groove.

4. The nozzle for a portable fire extinguisher suitable for perfluorohexanone according to claim 3, characterized in that: The sealing ring (4) is made of nitrile rubber.

5. The nozzle suitable for perfluorohexanone portable fire extinguisher according to claim 1, characterized in that: At least one straight channel (31) is provided through the end surface of the rotary core (3), and a plurality of spiral channels (32) are provided on the rotary core (3), and the plurality of spiral channels (32) are circumferentially distributed on the outer wall of the rotary core (3).

6. The nozzle for a portable fire extinguisher suitable for perfluorohexanone according to claim 1, characterized in that: The connecting pipe (1), the nozzle body (2) and the rotating core (3) are all made of stainless steel.

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