TWM582407U - Nozzle of liquid fire extinguisher - Google Patents

Abstract

The invention discloses a nozzle for a liquid fire extinguisher, comprising: a threaded joint, a nozzle joint and a spiral core; the tail end of the nozzle joint is connected to the throat of the fire extinguisher through a threaded joint; wherein the inside of the nozzle joint has a liquid fire extinguishing agent a second flow path, the second flow path is sequentially divided into a disturbance chamber, a throat portion and an expansion port from the tail end to the front end of the nozzle joint, and the cross-sectional area of the disturbance chamber and the expansion port is larger than the cross-section of the throat portion The nozzle joint also has an air suction passage that communicates the expansion port and the outside along the radial direction of the nozzle joint; the spiral core is placed into the disturbance chamber in a loose fit and relationship, the spiral core has a central axis and is uniformly disposed on the central shaft a plurality of spiral fins on the outer side; when the high-pressure liquid fire extinguishing agent passes through the second flow passage, it firstly pushes the spiral core in the disturbance chamber to rotate at a high speed, and the liquid fire extinguishing agent forms a vortex by the disturbance action when the spiral core rotates. Exercise can increase the range of the liquid fire extinguishing agent and the atomization effect of the liquid fire extinguishing agent mixed with the air after passing through the throat.

Description

Nozzle for liquid fire extinguisher

The present invention relates to the construction of an accumulator type liquid fire extinguisher, and more particularly to a nozzle for a liquid fire extinguisher.

The basic principle of a fire extinguisher is to pass a built-in chemical (extinguishing agent or propellant gas, or both) through a throat to a nozzle at the end of the throat and then spray it out to save the fire. Different types of fire extinguishers contain different chemicals or fire-extinguishing chemicals. They are designed for different fires. Generally speaking, fire extinguishers can be used to release solid, liquid or gas fire-extinguishing agents. The effect and cause danger. According to EU standards, there are five types of fire extinguishers, namely Class A, Class B, Class C, Class D and Class E.

Conventional fire extinguisher nozzles are usually designed with a single nozzle. The outlet of the spout has a slightly smaller diameter for the purpose of injecting the extinguishing agent in a concentrated manner, and it is desirable to obtain a longer range. The nozzle of the conventional nozzle is a simple hole structure, and the liquid fire extinguishing agent basically forms a simple water column shape after being sprayed by pressure, and it is difficult to achieve the atomization effect. If a water-based fire extinguishing agent sprayed from such a conventional spray head is used to cope with a Class E fire (electrical fire), there is a risk of electric shock.

Conversely, if the atomizing nozzle capable of producing fine atomized water droplets is directly applied to the fire extinguisher, although the atomization effect of the fire extinguishing agent can be greatly increased, the range of the fire extinguishing agent can be greatly reduced, and the ability to extinguish the fire can be affected.

The technical problem to be solved by the present invention is to provide a nozzle for a liquid fire extinguisher.

Based on solving the above technical problems, an embodiment of the nozzle of the novel liquid fire extinguisher comprises: a threaded joint, a nozzle joint and a spiral core.

Wherein the nipple has a first flow passage extending through the nipple in the axial direction, the axial ends of the nipple having a first external thread and a second external thread respectively; wherein the tail end of the nozzle joint has a first internal thread For connecting with the first external thread, the inside of the nozzle joint has a second flow passage through which the liquid fire extinguishing agent can pass, the second flow passage penetrates the axial direction of the nozzle joint, and the second flow passage passes from the tail end of the nozzle joint to the nozzle The direction of the front end of the joint is sequentially divided into a disturbance chamber, a throat portion and an expansion port, wherein the disturbance chamber is connected to the throat through a tapered hole, and the tapered hole is tapered by the disturbance chamber toward the throat. a tapered hole structure, wherein a cross-sectional area of the disturbance chamber and the expansion port is larger than a cross-sectional area of the throat, and the nozzle joint further has an air suction passage connecting the expansion port and the outside along a radial direction of the nozzle joint; and wherein the spiral core a perturbation cavity of the nozzle joint is disposed in a loose fit and relationship, the spiral core having a central axis and a plurality of spiral fins uniformly disposed outside the central axis, the spiral fins being in a spiral shape About the central axis extending along the axial direction of the shaft center axis to form a helical spiral between any two adjacent fins channels for liquid extinguishing agent through.

The tail end of the nozzle joint has a hollow connecting chamber therein, and the tail end of the second flow passage communicates with the connecting chamber, and the connecting chamber is surrounded by an end wall and a ring side wall which are located in a radial section of the nozzle joint. The hollow body has a first internal thread disposed on an inner side surface of the annular side wall, and a front end of the nipple has a leakage preventing gasket tightly sandwiched between a front end of the nipple and an end wall of the connecting cavity.

As a preferred construction of the nozzle of the novel liquid fire extinguisher, the central shaft and the plurality of spiral fins are integrally formed members.

The beneficial effect of the nozzle of the novel liquid fire extinguisher is that the high-pressure liquid fire extinguishing agent firstly pushes the spiral core in the disturbance chamber to rotate at a high speed when passing through the second flow passage of the nozzle joint, and the liquid state is caused by the disturbance when the spiral core rotates. The squirting action of the fire extinguishing agent increases the range of the liquid fire extinguishing agent and the atomization effect of the liquid fire extinguishing agent mixed with the air after passing through the throat.

10‧‧‧Threaded take over

11‧‧‧First runner

12‧‧‧First external thread

13‧‧‧Second external thread

14‧‧‧ leakproof gasket

20‧‧‧Nozzle joint

21‧‧‧Connecting cavity

211‧‧‧End wall

212‧‧‧ annular side wall

22‧‧‧First internal thread

23‧‧‧Second runner

24‧‧‧ disturbing cavity

25‧‧‧ throat

26‧‧‧Expansion

27‧‧‧ tapered holes

28‧‧‧ inhalation

30‧‧‧Spiral core

31‧‧‧ center axis

32‧‧‧Spiral fins

40‧‧‧pipes

41‧‧‧ pipe joint

50‧‧‧Fire extinguisher

Fig. 1 is a perspective view showing the construction of an embodiment of a nozzle of the novel liquid fire extinguisher.

Figure 2 is an exploded perspective view of one embodiment of a nozzle of the novel liquid fire extinguisher.

Fig. 3 is a sectional structural view of Fig. 2;

Figure 4 is a configuration diagram of the end face of the spiral core.

Fig. 5 is a schematic view showing the operation of the nozzle of the novel liquid fire extinguisher.

Fig. 6 is a schematic view showing an application example of the nozzle of the novel liquid fire extinguisher.

Fig. 7 is a schematic view showing another application example of the nozzle of the novel liquid fire extinguisher.

The positional relationship described in the following embodiments includes upper, lower, left and right, and unless otherwise specified, is based on the direction indicated by the components in the drawing.

Referring first to Figures 1 and 2, there is shown a structural view and an exploded view of an embodiment of a nozzle of the novel liquid fire extinguisher.

An embodiment of a nozzle of the novel liquid fire extinguisher comprises: a thread The nozzle 10, a nozzle joint 20 and a spiral core 30 are connected. Wherein the tail end of the nozzle joint 20 is connected to the nipple 10, an application example of the nozzle of the novel liquid fire extinguisher is to connect the nozzle joint 20 to the throat 40 of the fire extinguisher 50 through the nipple 10 (see Fig. 6), in the novel liquid fire extinguisher Another application of the nozzle is to directly connect the nozzle joint 20 through the nipple 10 to the body outlet joint of the cylinder of the fire extinguisher 50 (see Figure 7).

Please refer to Fig. 3, which is a sectional structural view of the nozzle of the novel liquid fire extinguisher. The nipple 10 has a first flow passage 11 extending through the nipple 10 in the axial direction. The axial ends of the nipple 10 have a first external thread 12 and a second external thread 13, respectively, wherein the second external thread 13 A pipe joint 41 for connecting the throat 40 of the fire extinguisher.

The tail end of the nozzle joint 20 has a first internal thread 22 for connection with the first external thread 12 of the nipple 10. As a preferred embodiment of the nozzle joint 20, the nozzle joint 20 has a hollow connecting chamber 21 therein. The connecting cavity 21 is a hollow cavity surrounded by an end wall 211 and an annular side wall 212 of a radial section of the nozzle joint 20, and the first internal thread 22 is disposed on the annular side wall of the connecting cavity 21. The inner side of the nipple, the front end of the nipple 10 has a leak-proof gasket 14 which is tightly closed after the first internal thread 22 of the nozzle joint 20 and the first external thread 12 of the nipple 10 are screwed to each other. It is sandwiched between the front end of the nipple 10 and the end wall 211 of the connection chamber 21 to form a sealed leakproof state.

The inside of the nozzle joint 20 has a second flow passage 23 through which the liquid fire extinguishing agent can pass. The second flow passage 23 penetrates the axial direction of the nozzle joint 20, and the trailing end of the second flow passage 23 communicates with the connecting chamber 21, The second flow passage 23 is sequentially divided into a disturbance chamber 24, a throat portion 25 and an expansion port 26 from the trailing end of the nozzle joint 20 toward the front end of the nozzle joint 20, wherein the disturbance chamber 24 passes through a tapered hole 27 and a throat The portions 25 are joined together, and the tapered holes 27 are directed toward the throat 25 by the disturbance chamber 24. A tapered hole structure in which the direction is tapered, wherein the cross-sectional area of the disturbance chamber 24 and the expansion port 26 is larger than the cross-sectional area of the throat 25.

The nozzle joint 20 further has an intake passage 28 that communicates with the expansion port 26 and the outside in the radial direction of the nozzle joint 20, and the high-pressure liquid fire extinguishing agent passes through the second flow passage 23 of the nozzle joint 20 by The action of the venturi pipe draws outside air from the inhalation passage 28 into the expansion port 26 (see Figure 5), which in turn is mixed with the high-pressure sprayed liquid fire extinguishing agent to enhance the atomization effect of the fire extinguishing agent.

The spiral core 30 is inserted into the disturbance chamber 24 of the nozzle joint 20 in a loose fit and relationship. The spiral core 30 has a central shaft 31 and a plurality of spiral fins 32 uniformly disposed outside the central shaft 31 (see Fig. 4). The central shaft 31 and the plurality of spiral fins 32 are integrally formed members, for example, a spiral core 30 is formed by a plastic injection molding technique, and a plurality of spiral fins 32 are spirally wound around the central axis 31. The axis of the shaft extends in the axial direction of the central axis, and a spiral passage 33 is formed between any two adjacent spiral fins 32 for the liquid fire extinguishing agent to pass. Referring to the action diagram of FIG. 5, when the high-pressure liquid fire extinguishing agent passes through the second flow path 23 of the nozzle joint 20, it firstly pushes the spiral core 30 in the disturbance chamber 24 to rotate at a high speed, and the disturbance occurs when the spiral core 30 rotates. The action allows the liquid fire extinguishing agent to form a vortex motion, which can increase the range of the liquid fire extinguishing agent and the atomization effect of the liquid fire extinguishing agent mixed with the air after passing through the throat 25.

Although the present invention has been disclosed above by the above embodiments, it is not intended to limit the present invention, and those skilled in the art can make some modifications and retouchings without departing from the spirit and scope of the present invention. The scope of patent protection is subject to the definition of the claims of the present application.

Claims (3)

A nozzle of a liquid fire extinguisher, comprising: a threaded joint having a first flow passage extending through the threaded joint in an axial direction, the axial ends of the threaded joint having a first external thread and a second external thread respectively; a nozzle joint having a first internal thread for connecting with the first external thread of the nipple, the nozzle joint having a second flow passage through which the liquid fire extinguishing agent can pass The second flow passage penetrates the axial direction of the nozzle joint, and the second flow passage is sequentially divided into a disturbance chamber, a throat portion and an expansion port from a tail end of the nozzle joint to a front end of the nozzle joint, wherein the disturbance The cavity is coupled to the throat through a tapered hole, the tapered hole being a tapered hole structure tapered from the disturbance cavity toward the throat, wherein a cross-sectional area of the disturbance cavity and the expansion port is larger than the a cross-sectional area of the throat, the nozzle joint further having an air suction passage that communicates the expansion port and the outer portion along a radial direction of the nozzle joint; and a spiral core that is inserted into the nozzle in a loose fit and relationship Jointed a helical cavity having a central axis and a plurality of helical fins evenly disposed outside the central axis, wherein the helical fins are helically disposed about the axis of the central axis along the axis The central axis extends in the axial direction, and any two adjacent spiral fins form a spiral passage for the liquid fire extinguishing agent to pass. The nozzle of the liquid fire extinguisher according to claim 1, wherein a tail end of the nozzle joint has a hollow connecting chamber, and a tail end of the second flow passage communicates with the connecting chamber, and the connecting chamber is located at the nozzle joint. a hollow cavity having an end wall and an annular side wall surrounded by an annular wall, the first internal thread being disposed on an inner side of the annular side wall of the connecting cavity, the front end of the threaded pipe having a leakage preventing washer Closely sandwiched between the front end of the nipple and the end wall of the connecting chamber. The nozzle of the liquid fire extinguisher of claim 1, wherein the central shaft and the plurality of spiral fins are integrally formed members.