Nozzle structure of fire extinguishing device

Abstract

The present invention relates to a nozzle structure of a fire extinguishing device. The nozzle structure comprises an inner cylinder, wherein the inner cylinder is configured to place a fire extinguishing medium therein; a circle of flanging is provided at an end opening of the inner cylinder; a pressure relief diaphragm, a sealing ring and an end cap are sequentially mounted at the end opening of the inner cylinder; a spray hole is provided at the center of the pressure relief diaphragm, and a sealing plug is mounted at the spray hole; and a circular hole is provided at the center of each of the sealing ring and the end cover. In the present invention, by means of the provision of the pressure relief diaphragm at a nozzle of the fire extinguishing device, the provision of the spray hole in the pressure relief diaphragm, and the mounting of the sealing plug at the spray hole, sealing and moisture-prevention effects are achieved for the inside of the inner cylinder; when the fire extinguishing device is triggered, the sealing plug is flushed out by means of internal pressure, so as to eject the fire extinguishing medium; moreover, the internal pressure is relieved, and when the internal pressure is too high, the pressure can be relieved by tearing by means of tearing grooves in the pressure relief diaphragm. The sealing performance at the nozzle of the fire extinguishing device and the safety performance during ejection and pressure relief are both relatively good.

Description

A nozzle structure of a fire extinguishing device Technical Field

[0001] The present invention relates to the technical field of fire fighting, in particular to a nozzle structure of a fire extinguishing device. Background Art

[0002] There are many types of fire extinguishing devices. According to their mobility, they can be divided into: portable and trolley types; according to the power source of the fire extinguishing agent, they can be divided into: gas cylinder type, pressure storage type, chemical reaction type; according to the fire extinguishing agent filled, they can be divided into: foam, dry powder, halogenated hydrocarbons, carbon dioxide, water, etc.

[0003] When a fire extinguishing device is triggered, a high internal pressure is generated, which in turn sprays the fire extinguishing medium from the nozzle. When not triggered, the nozzle must be able to provide a good seal to prevent internal moisture. Once the internal triggering element or the fire extinguishing medium becomes damp, it will affect the normal use of the fire extinguishing device, preventing the fire extinguishing medium from being sprayed when needed, causing a major safety accident. After being triggered, the internal pressure must be released in a timely manner, otherwise, excessive internal pressure will cause a safety accident. Therefore, the design of the nozzle of the fire extinguishing device is particularly important. Existing fire extinguishing devices cannot perfectly balance the sealing performance of the nozzle and the safety performance during the pressure release. Therefore, a fire extinguishing device nozzle structure is needed to solve the above technical problems. Technical issues

[0004] The present invention aims to solve the technical problems existing in the prior art and provides a nozzle structure of a fire extinguishing device. Technical Solutions

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a fire extinguishing device nozzle structure includes an inner cylinder, the inner cylinder is used to place a fire extinguishing medium, a pressure relief diaphragm is installed at the end opening of the inner cylinder, and a spray hole and a tearing groove are provided on the pressure relief diaphragm. The spray hole is arranged at the center of the pressure relief diaphragm, and the tearing groove is arranged on the periphery of the spray hole. The tearing groove is suitable for tearing when the pressure is greater than a preset pressure to increase the area of ​​the spray hole.

[0006] Preferably, in the above-mentioned nozzle structure of the fire extinguishing device, an end cover is fixedly installed at the end opening of the inner tube, the pressure relief diaphragm is clamped and positioned between the end cover and the end surface of the inner tube, and a circular hole connected to the nozzle hole is opened on the end cover.

[0007] Preferably, in the above-mentioned nozzle structure of the fire extinguishing device, a sealing plug is installed on the pressure relief diaphragm, and the sealing plug is embedded in the interior of the nozzle hole.

[0008] Preferably, in the above-mentioned nozzle structure of the fire extinguishing device, a sealing sticker is provided on the end cover, and the sealing sticker covers the circular hole.

[0009] Preferably, in the above-mentioned nozzle structure of the fire extinguishing device, the sealing plug includes a conical plug body, a circle of grooves is provided on the outer side of the conical plug body, the outer periphery of the spray hole is embedded in the groove, and the groove and the spray hole are interference fit.

[0010] Preferably, in the above-mentioned nozzle structure of the fire extinguishing device, a circle of flange is provided at the end opening of the inner tube, and a plurality of claws are provided at the lower end of the end cover. The flange extends horizontally to the outside of the inner tube, and the claws are buckled with the bottom of the flange.

[0011] Preferably, in the above-mentioned nozzle structure of the fire extinguishing device, a sealing ring is provided between the end cover and the pressure relief diaphragm, and the pressure relief diaphragm, the sealing ring and the end cover are installed in sequence during installation.

[0012] Preferably, in the above-mentioned nozzle structure of the fire extinguishing device, the claws are arranged in a circular array with the center of the end cover as the center.

[0013] Preferably, in the above-mentioned nozzle structure of the fire extinguishing device, the thickness of the tear groove is smaller than the thickness of the pressure relief diaphragm, and the tear groove extends to the nozzle hole.

[0014] Preferably, in the above-mentioned nozzle structure of the fire extinguishing device, the nozzle hole is circular. Beneficial effects

[0015] The present invention has the following beneficial effects: by providing a pressure relief diaphragm at the nozzle of the fire extinguishing device, providing a spray hole on the pressure relief diaphragm, and installing a sealing plug at the spray hole, the interior of the inner cylinder is sealed and moisture-proofed. When the fire extinguishing device is triggered, the internal pressure pushes the sealing plug out, thereby spraying the fire extinguishing medium and simultaneously relieving the internal pressure. If the internal pressure is excessive, the pressure can be torn and released through the tear groove on the pressure relief diaphragm. This fire extinguishing device has excellent sealing performance at the nozzle and safety performance during spraying and pressure relief. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the overall structure of the present invention;

[0017] FIG2 is a partial enlarged view of point C in FIG1 ;

[0018] Figure 3 is a schematic structural diagram of the pressure relief diaphragm and the sealing plug;

[0019] Figure 4 is a schematic structural diagram of the end cover;

[0020] FIG5 is a front view of the present invention;

[0021] Figure 6 is a cross-sectional view of the section AA in Figure 5;

[0022] FIG7 is a partial enlarged view of point B in FIG6 .

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Inner tube, 2. Pressure relief diaphragm, 21. Tear groove, 3. Sealing ring, 4. End cover, 41. Claw, 5. Sealing sticker, 6. Flanged edge, 7. Sealing plug. Modes for Carrying Out the Invention

[0025] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] As shown in Figures 1, 2, 3, 4, 5, 6, and 7, a nozzle structure for a fire extinguishing device includes an inner cylinder 1. Inner cylinder 1 is cylindrical and is used to store fire extinguishing medium. A flange 6 is provided at the open end of inner cylinder 1 to support a pressure relief diaphragm 2. Flange 6 is an outward flange that extends horizontally to the outside of inner cylinder 1.

[0027] As shown in Figures 2, 4, 6, and 7, the pressure relief diaphragm 2, sealing ring 3, and end cap 4 are installed at the end opening of the inner cylinder 1, in that order. The lower end of the end cap 4 is provided with multiple claws 41. The end cap 4 and claws 41 are preferably made of metal and are integrally molded. The claws 41 are arranged in a circular array centered around the center of the end cap 4. Initially, the claws 41 at the lower end of the end cap 4 are vertically downward, parallel to the axis of the inner cylinder 1. During installation, a closing machine is used to close the claws 41, bending them inward so that they hook onto the flange 6 of the inner cylinder 1. This allows the claws 41 to engage with the bottom of the flange 6, securing the pressure relief diaphragm 2 and sealing ring 3 in place. After installation, the sealing ring 3 and pressure relief diaphragm 2 are pressed against the flange 6 of the inner cylinder 1 by the end cap 4, ensuring a tight fit between the flange 6, the pressure relief diaphragm 2, the sealing ring 3, and the end cap 4.

[0028] As shown in Figure 3, a spray hole is located at the center of the pressure relief diaphragm 2, where a sealing plug 7 is installed. The sealing plug 7 is made of a soft rubber material with a high ignition point, preferably silicone. The sealing plug 7 is provided with a ring of grooves that form an interference fit with the spray hole of the pressure relief diaphragm 2, thereby ensuring that the interior of the inner tube 1 is sealed from the outside world and prevents internal moisture. When the fire extinguishing device is triggered, the sealing plug 7, made of a soft rubber or silicone material, is squeezed and deformed by internal pressure, causing the barrier inside the groove to be squeezed and deformed, ultimately pushing the sealing plug 7 out of the spray hole, thereby releasing the fire extinguishing medium from the spray hole to extinguish the fire.

[0029] There are circular holes at the center of the sealing ring 3 and the end cover 4. The two circular holes are coaxial with the nozzle of the pressure relief diaphragm 2, and the area of ​​the circular hole is larger than the positive projection area of ​​the sealing plug 7 on the plane where the pressure relief diaphragm 2 is located (that is, the area of ​​the circular hole is larger than any cross-sectional area of ​​the sealing plug 7), ensuring that when the fire extinguishing device is triggered, the sealing plug 7 can be flushed out by the internal pressure and sprayed out from the circular hole. A sealing sticker 5 is pasted on the top of the end cover 4, and the sealing sticker 5 covers the circular hole of the end cover 4, which can effectively protect the end cover 4 and the pressure relief diaphragm 2, while ensuring the airtightness of the device. A plurality of tear grooves 21 are provided on the outside of the nozzle of the pressure relief diaphragm 2. The thickness of the tear groove 21 is less than the thickness of the pressure relief diaphragm 2. The thickness of the tear groove 21 can be set according to specific circumstances, such as the pressure curve inside the inner tube 1 when the fire extinguishing medium is triggered, which is reasonably set according to its maximum pressure value. The tear groove 21 extends to the spray hole. When the fire extinguishing device is triggered, if the internal pressure is too high and cannot be released in time, the tear groove 21 can be torn due to its slightly weak pressure bearing capacity, thereby achieving a safe pressure relief effect and providing higher safety protection.

[0030] When installing the nozzle of the fire extinguishing device, first install the sealing plug 7 on the pressure relief diaphragm 2, place the pressure relief diaphragm 2 on the flange 6, place the sealing ring 3 on the upper side of the pressure relief diaphragm 2, and press the end cover 4 onto the sealing ring 3. The claws 41 at the lower end of the end cover 4 are initially vertically downward and parallel to the axis of the inner tube 1. Then, the end cover 4 is closed by a closing machine, and the claws 41 are bent inward so that they hook onto the flange 6 of the inner tube 1, thereby fixing the pressure relief diaphragm 2 and sealing ring 3 in this position. Finally, the sealing sticker 5 is affixed to the end cover 4. During the installation process, the sealing ring 3 can effectively protect the pressure relief diaphragm 2 when the end cover 4 is closed.

[0031] In addition, the fixing and installation method of the end cover 4 and the inner tube 1 in the present invention is not limited to the above-mentioned installation method, and can also be installed and fixed by other fixing connection methods, such as bolt connection, threaded connection, snap-on locking connection and other connection methods.

[0032] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A nozzle structure of a fire extinguishing device, characterized in that: The invention comprises an inner cylinder (1), wherein the inner cylinder (1) is used to place a fire extinguishing medium, a pressure relief diaphragm (2) is installed at the end opening of the inner cylinder (1), and a spray hole and a tear groove (21) are arranged on the pressure relief diaphragm (2), the spray hole is arranged at the center of the pressure relief diaphragm (2), and the tear groove (21) is arranged at the periphery of the spray hole, and the tear groove (21) is suitable for tearing when the pressure is greater than a preset pressure, so as to increase the area of ​​the spray hole.

2. The nozzle structure of the fire extinguishing device according to claim 1, characterized in that: An end cover (4) is fixedly mounted at the end opening of the inner cylinder (1), the pressure relief diaphragm (2) is clamped and positioned between the end cover (4) and the end surface of the inner cylinder (1), and a circular hole communicating with the spray hole is opened on the end cover (4).

3. The nozzle structure of the fire extinguishing device according to claim 2, characterized in that: A sealing plug (7) is installed on the pressure relief diaphragm (2), and the sealing plug (7) is embedded in the interior of the spray hole.

4. The nozzle structure of the fire extinguishing device according to claim 3, characterized in that: The end cover (4) is provided with a sealing sticker (5), and the sealing sticker (5) covers the circular hole.

5. The nozzle structure of the fire extinguishing device according to claim 3, characterized in that: The sealing plug (7) comprises a conical plug body, the outer side of the conical plug body is provided with a circle of clamping grooves, the outer periphery of the spray hole is embedded in the clamping grooves, and the clamping grooves and the spray hole are interference fit.

6. The nozzle structure of the fire extinguishing device according to claim 2, characterized in that: A circle of flange (6) is provided at the end opening of the inner cylinder (1), and a plurality of claws (41) are provided at the lower end of the end cover (4). The flange (6) extends horizontally to the outside of the inner cylinder (1), and the claws (41) are buckled with the bottom of the flange (6).

7. The nozzle structure of the fire extinguishing device according to claim 6, characterized in that: A sealing ring (3) is provided between the end cover (4) and the pressure relief diaphragm (2); during installation, the pressure relief diaphragm (2), the sealing ring (3) and the end cover (4) are installed in sequence.

8. The nozzle structure of the fire extinguishing device according to claim 6, characterized in that: The claws (41) are arranged in a circular array with the center of the end cover (4) as the center.

9. The nozzle structure of the fire extinguishing device according to claim 1, characterized in that: The thickness of the tear groove (21) is smaller than the thickness of the pressure relief diaphragm (2), and the tear groove (21) extends to the spray hole.

10. The nozzle structure of the fire extinguishing device according to claim 1, characterized in that: The spray hole is circular.

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