Nozzle of fire extinguishing device

Abstract

A nozzle of a fire extinguishing device comprises an inner nozzle body, a first sealing piece, a sealing sleeve, an outer nozzle body and a second sealing piece, the inner nozzle body and the outer nozzle body generate axial displacement through threaded fit of a second threaded section and a threaded hole, so that the distance between a conical section and a second conical hole is adjusted, and an adjustable spraying channel is formed. The straight section and the outer nozzle are sleeved with the two ends of the sealing sleeve respectively, a first sealing piece is arranged between the sealing sleeve and the straight section, and a second sealing piece is arranged between the sealing sleeve and the outer wall of the outer nozzle. According to the fire extinguishing device nozzle, the distance between the conical section and the second conical hole is axially adjusted through threaded fit of the inner nozzle body and the outer nozzle body, and the fire extinguishing efficiency is improved; through the knurling design of the outer wall of the outer nozzle, the operation convenience is improved; the fire extinguishing efficiency is improved by forming the first taper hole with the gradually-reduced sectional area in the outlet of the inner nozzle and forming the gradually-expanded third taper hole in the outlet of the outer nozzle.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire fighting equipment technical field, concretely relates to a fire extinguishing device nozzle. BACKGROUND

[0002] The fire extinguishing device is usually stored in public places or places where fire may occur, and it is the most basic fire fighting tool in public places, industrial facilities and families, and is also the key equipment for initial fire fighting. The nozzle of the fire extinguishing device is a key component in the fire extinguishing system, which is responsible for spraying the fire extinguishing agent at a specific flow rate, speed and direction to achieve the best fire extinguishing effect. The design of the nozzle directly affects the spraying mode, coverage range and fire extinguishing efficiency of the fire extinguishing agent.

[0003] However, the conventional fire extinguishing device nozzle is of fixed structure, and cannot dynamically adjust the flow rate, atomization effect or spraying range of the fire extinguishing agent according to the fire situation, resulting in limited fire extinguishing efficiency. Therefore, it is of great significance to research a new type of fire extinguishing device nozzle to solve the above problems and improve the fire extinguishing efficiency of the fire extinguishing device. SUMMARY

[0004] To solve the above problems, the utility model provides a fire extinguishing device nozzle, the fire extinguishing device nozzle, through the screw thread cooperation of inner nozzle and outer nozzle, the interval of the conical section and the second taper hole is adjusted axially, and the controllable annular channel is formed, so that the fire extinguishing agent flow, flow rate and atomization fineness are adjusted flexibly, and then the fire extinguishing efficiency of the fire extinguishing device is improved;The knurled pattern design on the outer wall of the outer nozzle facilitates manual rotation adjustment, without the need for special tools, and the convenience of nozzle operation is improved;By providing the first taper hole with gradually reduced cross-sectional area at the outlet of the inner nozzle and the third taper hole with gradually expanded cross-sectional area at the outlet of the outer nozzle, a gradually reduced and gradually expanded spraying channel is formed, which can provide different spraying modes according to requirements, adapt to diversified fire extinguishing scenes, and the change of spraying mode helps to reduce the waste of fire extinguishing agent and improve the fire extinguishing efficiency.

[0005] The technical scheme of the utility model is as follows:

[0006] A fire extinguishing device nozzle, comprising an inner nozzle, a first sealing element, a sealing sleeve, an outer nozzle and a second sealing element, the inner hole of the inner nozzle comprises a first straight hole, the outer wall of the inner nozzle comprises a first threaded section, a straight section, a second threaded section and a conical section from left to right in order, the inner hole of the outer nozzle comprises a threaded hole, a second straight hole, a second taper hole and a third straight hole from left to right in order, the inner nozzle and the outer nozzle are axially displaced by screw thread cooperation of the second threaded section and the threaded hole to adjust the interval of the conical section and the second taper hole and form an adjustable spraying channel, the sealing sleeve is sleeved on the straight section and the outer nozzle at both ends respectively, the first sealing element is arranged between the sealing sleeve and the straight section, and the second sealing element is arranged between the outer wall of the sealing sleeve and the outer nozzle.

[0007] The inner hole right side outlet of the inner nozzle is provided with a first taper hole with a gradually reduced cross-sectional area.

[0008] The thread of the first threaded section is a conical thread.

[0009] The thread of the second threaded section and the threaded hole is a cylindrical pipe thread.

[0010] The taper section has the same taper as the second taper hole.

[0011] The distance between the taper section and the second taper hole is controlled in a range of 1-5mm.

[0012] In order to prolong the service life, maintain good corrosion resistance and wear resistance, the sealing sleeve is made of polytetrafluoroethylene composite material.

[0013] In order to improve the sealing effect and prevent leakage in a high-pressure environment, the first sealing element and the second sealing element are both labyrinth seals.

[0014] In order to facilitate manual rotation adjustment and improve the convenience of nozzle operation, the outer wall of the outer nozzle away from the second sealing side is provided with a knurled pattern.

[0015] In order to form a gradually tapered and gradually expanded spray channel, different spray modes can be provided according to requirements, adapt to diversified fire extinguishing scenes, and the change of spray mode helps to reduce the waste of fire extinguishing agent and improve the fire extinguishing efficiency.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. The fire extinguishing device nozzle disclosed by the present utility model adjusts the distance between the taper section and the second taper hole in the axial direction through the thread cooperation of the inner nozzle and the outer nozzle, forms a controllable annular channel, and thus flexibly adjusts the fire extinguishing agent flow, flow rate and atomization fineness, thereby improving the fire extinguishing efficiency of the fire extinguishing device.

[0018] 2. The fire extinguishing device nozzle disclosed by the present utility model is designed with a knurled pattern on the outer wall of the outer nozzle, which facilitates manual rotation adjustment and does not require special tools, thereby improving the convenience of nozzle operation.

[0019] 3. The fire extinguishing device nozzle disclosed by the present utility model forms a gradually tapered and gradually expanded spray channel through the first taper hole with a gradually reduced cross-sectional area at the outlet of the inner nozzle and the third taper hole with a gradually expanded cross-sectional area at the outlet of the outer nozzle, can provide different spray modes according to requirements, adapt to diversified fire extinguishing scenes, and the change of spray mode helps to reduce the waste of fire extinguishing agent and improve the fire extinguishing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] The solutions and advantages of the present application will become clear to those of ordinary skill in the art from the following detailed description of the preferred embodiments. The drawings are merely provided for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application.

[0021] In the drawings:

[0022] Figure 1 Structure schematic view of the structure when the distance between the cone section and the second cone hole of the nozzle of the fire extinguishing device of the embodiment of the present application is small;

[0023] Figure 2 Structure schematic view of the structure when the distance between the cone section and the second cone hole of the nozzle of the fire extinguishing device of the embodiment of the present application is large.

[0024] The components represented by the reference numerals in the drawings are:

[0025] The present application: 1, inner nozzle, 1a, first straight hole, 1b, first threaded section, 1c, straight section, 1d, second threaded section, 1e, cone section, 1f, first cone hole, 2, first sealing element, 3, sealing sleeve, 4, outer nozzle, 4a, threaded hole, 4b, second straight hole, 4c, second cone hole, 4d, third straight hole, 4e, third cone hole, 5, second sealing element. DETAILED DESCRIPTION

[0026] As Figure 1 and Figure 2As shown, a fire extinguishing device nozzle comprises an inner nozzle 1, a first seal 2, a sealing sleeve 3, an outer nozzle 4 and a second seal 5, the inner hole of the inner nozzle 1 comprises a first straight hole 1a, preferably, the right side outlet of the inner hole of the inner nozzle 1 is provided with a first tapered hole 1f, the cross-sectional area of the first tapered hole 1f is gradually reduced; the outer wall of the inner nozzle 1 comprises a first threaded section 1b, a straight section 1c, a second threaded section 1d and a tapered section 1e from left to right, preferably, the threads of the first threaded section 1b are lotus-shaped threads, which facilitate the installation of the hose outlet of the fire extinguishing device with the first threaded section, have good sealing performance, reduce the risk of leakage, have high connection strength, ensure stable connection, are convenient to operate and facilitate assembly and disassembly; the inner hole of the outer nozzle 4 comprises a threaded hole 4a, a second straight hole 4b, a second tapered hole 4c and a third straight hole 4d from left to right, preferably, the right side outlet of the outer nozzle 4 is provided with a third tapered hole 4e, the cross-sectional area of the third tapered hole 4e is gradually expanded, by providing the first tapered hole with gradually reduced cross-sectional area at the outlet of the inner nozzle and the third tapered hole with gradually expanded cross-sectional area at the outlet of the outer nozzle, a tapered and gradually expanded spray channel is formed, different spray modes can be provided according to requirements, diversified fire extinguishing scenes are adapted, the change of spray modes helps to reduce the waste of fire extinguishing agent and improve the fire extinguishing efficiency; preferably, the outer wall of the outer nozzle 4 away from the second seal 5 is provided with a knurled pattern, by designing the knurled pattern on the outer wall of the outer nozzle, manual rotation adjustment is facilitated, special tools are not required, and the convenience of nozzle operation is improved; preferably, the threads of the second threaded section 1d and the threaded hole 4a are cylindrical pipe threads, which ensure firm connection and facilitate disassembly and assembly; the inner nozzle 1 and the outer nozzle 4 are axially displaced by the thread cooperation of the second threaded section 1d and the threaded hole 4a, so as to adjust the distance between the tapered section 1e and the second tapered hole 4c and form an adjustable spray channel, preferably, the taper of the tapered section 1e and the second tapered hole 4c is the same; the same taper ensures the adjustment accuracy of the tapered section and the second tapered hole and avoids errors; preferably, the distance adjustment range of the tapered section 1e and the second tapered hole 4c is controlled to be 1-5mm; the sealing sleeve 3 is sleeved on the straight section 1c and the outer nozzle 4 at both ends, preferably, the sealing sleeve 3 is made of polytetrafluoroethylene composite material, which is corrosion-resistant and wear-resistant, suitable for long-term or harsh environment fire extinguishing tasks, and has high stability and reliability, ensuring excellent performance in high-pressure or long-time use scenarios;The first seal 2 is arranged between the sealing sleeve 3 and the straight section 1c, and the second seal 5 is arranged between the sealing sleeve 3 and the outer wall of the outer nozzle 4. Preferably, the first seal 2 and the second seal 5 are both labyrinth seals. The labyrinth seal forms a tortuous flow passage through a plurality of alternating ridges and grooves. When the fluid (such as high-pressure extinguishing agent) flows through the labyrinth seal, the energy is gradually consumed due to repeated expansion, contraction and vortex loss, and the pressure gradient is dispersed. During the adjustment of the nozzle (axial displacement of the inner and outer nozzles), the labyrinth structure can adapt to the change of the small gap, avoid the sealing failure caused by mechanical friction, and further reduce the risk of leakage in combination with the self-lubricating property of the polytetrafluoroethylene sealing sleeve. The labyrinth seal is not sensitive to small axial or radial displacements, allowing the inner and outer nozzles to maintain sealing effect during adjustment. When adjusting the distance between the adjustment cone section 1e and the second cone hole 4c by rotating the threads, the labyrinth seal can adapt to the change of the gap to avoid instantaneous leakage caused by adjustment action. The nozzle of the fire extinguishing device adjusts the distance between the axial adjustment cone section and the second cone hole through the threaded connection of the inner nozzle and the outer nozzle, forms a controllable annular passage, and thus flexibly adjusts the flow, flow rate and atomization fineness of the extinguishing agent, thereby improving the fire extinguishing efficiency of the fire extinguishing device. By providing the first cone hole with a gradually reduced cross-sectional area at the outlet of the inner nozzle and the third cone hole with a gradually expanded cross-sectional area at the outlet of the outer nozzle, a gradually reduced and gradually expanded jet passage is formed, which can provide different jet modes according to the needs and adapt to diversified fire extinguishing scenarios. The change of the jet mode helps to reduce the waste of extinguishing agent and improve the fire extinguishing efficiency.

[0027] As shown in Figure 1 and Figure 2 , in use, first, the first threaded section 1b of the inner nozzle 1 is fixedly connected with the output hose of the fire extinguishing device, the fire extinguishing device is opened, and the extinguishing agent enters the inner hole of the outer nozzle 4 from the first straight hole 1a and the first cone hole 1f of the inner nozzle 1 through the output hose of the fire extinguishing device, and is sprayed out through the second straight hole 4b, the second cone hole 4c, the third straight hole 4d and the third cone hole 4e. At this time, according to the actual situation of the fire scene, the outer wall of the outer nozzle 4 is held by hand and rotated, the inner nozzle 1 and the outer nozzle 4 are axially displaced through the threaded connection of the second threaded section 1d and the threaded hole 4a, the distance between the cone section 1e and the second cone hole 4c is adjusted to form an adjustable jet passage, and the speed and range of the extinguishing agent sprayed out through the first cone hole 1f, the second straight hole 4b, the second cone hole 4c, the third straight hole and the third cone hole 4e are adjusted, thereby flexibly adjusting the flow, flow rate and atomization fineness of the extinguishing agent, and thereby improving the fire extinguishing efficiency of the fire extinguishing device.

Claims

1. A nozzle for a fire extinguishing device, characterized in that The inner nozzle (1) includes a first straight hole (1a), and the outer wall of the inner nozzle (1) includes a first threaded section (1b), a straight section (1c), a second threaded section (1d) and a tapered section (1e) from left to right, the inner hole of the outer nozzle (4) includes a threaded hole (4a), a second straight hole (4b), a second tapered hole (4c) and a third straight hole (4d) from left to right, the inner nozzle (1) and the outer nozzle (4) are axially displaced by the threaded cooperation of the second threaded section (1d) and the threaded hole (4a) to adjust the distance between the tapered section (1e) and the second tapered hole (4c) and form an adjustable jet channel, the sealing sleeve (3) is sleeved on the straight section (1c) and the outer nozzle (4) at both ends, respectively, the first sealing element (2) is arranged between the sealing sleeve (3) and the straight section (1c), and the second sealing element (5) is arranged between the sealing sleeve (3) and the outer wall of the outer nozzle (4).

2. A nozzle for a fire extinguishing device according to claim 1, characterised in that The right side outlet of the inner hole of the inner nozzle (1) is provided with a first tapered hole (1f) with a gradually reduced cross-sectional area.

3. A nozzle for a fire extinguishing device according to claim 1, characterised in that The thread of the first threaded section (1b) is a pagoda thread.

4. A nozzle for a fire extinguishing device according to claim 1, wherein The threads of the second threaded section (1d) and the threaded hole (4a) are cylindrical pipe threads.

5. A nozzle for a fire extinguishing device according to claim 1, wherein The taper of the tapered section (1e) is the same as that of the second tapered hole (4c).

6. A nozzle for a fire extinguishing device according to claim 1, wherein The distance adjustment range of the tapered section (1e) and the second tapered hole (4c) is controlled to be 1-5mm.

7. A nozzle for a fire extinguishing device according to claim 1, wherein The sealing sleeve (3) is made of polytetrafluoroethylene composite material.

8. A nozzle for a fire extinguishing device according to claim 1, wherein The first sealing element (2) and the second sealing element (5) are both labyrinth seals.

9. A nozzle for a fire extinguishing device according to claim 1, wherein The outer wall of the outer nozzle (4) is provided with a knurled pattern away from the second sealing element (5).

10. A nozzle for a fire extinguishing device according to claim 1, characterized in that The right side outlet of the outer nozzle (4) is provided with a third tapered hole (4e) with a gradually expanded cross-sectional area.

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