Nozzle structure of fire extinguishing device

Abstract

The utility model relates to a nozzle structure of a fire extinguishing device, which comprises an inner cylinder, the inner cylinder is used for placing a fire extinguishing medium, a circle of flange is arranged at an end opening of the inner cylinder, a pressure relief diaphragm, a sealing ring and an end cover are sequentially mounted at the end opening of the inner cylinder, a spray hole is formed in the center of the pressure relief diaphragm, and a sealing plug is mounted at the spray hole. And circular holes are formed in the centers of the sealing ring and the end cover. The pressure relief membrane is arranged at the nozzle of the fire extinguishing device, the spray hole is formed in the pressure relief membrane, and the sealing plug is mounted at the spray hole, so that the sealing and moisture-proof effects are achieved in the inner cylinder, when the fire extinguishing device is triggered, the sealing plug is flushed out through internal pressure, fire extinguishing media are sprayed, meanwhile, the pressure in the fire extinguishing device is relieved, and the fire extinguishing efficiency is improved. When the internal pressure is too large, tearing pressure relief can be conducted through the tearing groove in the pressure relief diaphragm. The sealing performance at the nozzle of the fire extinguishing device and the safety performance during spraying and pressure relief are good.

Description

Technical Field

[0001] The utility model 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, clean water, etc.

[0003] After the fire extinguishing device is triggered, a large pressure will be generated inside it, and the fire extinguishing medium will be sprayed out from the spray hole through the internal pressure. When not triggered, the spray hole must be able to play a good sealing role to prevent internal moisture. Once the internal triggering element or the fire extinguishing medium is damp, it will affect the normal use of the fire extinguishing device. When the fire is needed, the fire extinguishing medium cannot be sprayed, causing a major safety accident. After being triggered, the internal pressure must be released in time, otherwise it will cause a safety accident due to excessive internal pressure. Therefore, the design of the spray hole of the fire extinguishing device is particularly important. The sealing performance of the existing fire extinguishing device nozzle and the safety performance during the spray pressure release cannot be perfectly taken into account. Therefore, a fire extinguishing device nozzle structure is needed to solve the above technical problems. Utility Model Content

[0004] The utility model aims at the technical problems existing in the prior art and provides a nozzle structure of a fire extinguishing device.

[0005] The utility model provides a technical solution to the above technical problems as follows: a nozzle structure of a fire extinguishing device, comprising an inner cylinder, wherein 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, a spray hole and a tearing groove are arranged on the pressure relief diaphragm, the spray hole is arranged at the center of the pressure relief diaphragm, and the tearing groove is arranged at the periphery of the spray hole, and 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 comprises a conical plug body, the outer side of the conical plug body is provided with a circle of grooves, the outer periphery of the spray hole is embedded in the grooves, and the grooves and the spray hole are interference fit.

[0010] Preferably, in the above-mentioned fire extinguishing device nozzle structure, 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 during installation, the pressure relief diaphragm, the sealing ring and the end cover are installed in sequence.

[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 at 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.

[0015] The utility model has the following beneficial effects: the utility model provides a pressure relief diaphragm at the nozzle of the fire extinguishing device, provides a spray hole on the pressure relief diaphragm, and installs a sealing plug at the spray hole, thereby sealing and moisture-proofing the inner cylinder, and when the fire extinguishing device is triggered, the sealing plug is flushed out by the internal pressure, thereby spraying the fire extinguishing medium and relieving the pressure inside at the same time, and when the internal pressure is too large, the pressure can be torn and released through the tearing groove on the pressure relief diaphragm. The sealing performance at the nozzle of the fire extinguishing device and the safety performance during spraying and pressure relief are both good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 for Figure 1 A partial enlarged view of point C in the middle;

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

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

[0020] Figure 5 It is a front view of the utility model;

[0021] Figure 6 for Figure 5 Sectional view at A-A in the middle;

[0022] Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

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

[0024] 1. Inner cylinder, 2. Pressure relief diaphragm, 21. Tear groove, 3. Sealing ring, 4. End cover, 41. Claw, 5. Sealing sticker, 6. Flanging, 7. Sealing plug. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with 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] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, a nozzle structure of a fire extinguishing device includes an inner tube 1, which is cylindrical and is used to place a fire extinguishing medium. A circle of flange 6 is provided at the end opening of the inner tube 1, and the flange 6 is used to support the pressure relief diaphragm 2, and the flange 6 is an outer flange, and the flange 6 extends horizontally to the outside of the inner tube 1.

[0027] like Figure 2 , Figure 4 , Figure 6 , Figure 7 As shown, the pressure relief diaphragm 2, the sealing ring 3, and the end cover 4 are installed in sequence at the end opening of the inner cylinder 1. The lower end of the end cover 4 is provided with a plurality of claws 41. The end cover 4 and the claws 41 are preferably made of metal, and the end cover 4 and the claws 41 are an integrally formed structure. The claws 41 are arranged in a circular array with the center of the end cover 4 as the center. The claws 41 at the lower end of the end cover 4 are vertically downward and parallel to the axial direction of the inner cylinder 1 in the initial state. During installation, the claws 41 are closed by a closing machine, and the claws 41 are bent inward to hook on the flange 6 of the inner cylinder 1, so that the claws 41 are buckled with the bottom of the flange 6, thereby fixing the pressure relief diaphragm 2 and the sealing ring 3 in this position. After installation, the sealing ring 3 and the pressure relief diaphragm 2 are pressed by the end cover 4 on the position of the flange 6 of the inner cylinder 1, so that the flange 6, the pressure relief diaphragm 2, the sealing ring 3, and the end cover 4 are tightly fitted.

[0028] like Figure 3As shown, a spray hole is arranged at the center of the pressure relief diaphragm 2, and a sealing plug 7 is installed at the spray hole. The sealing plug 7 is made of a soft rubber material with a high ignition point, preferably a silicone material. A circle of card slots is arranged on the sealing plug 7, and the card slots are interference fit with the spray hole of the pressure relief diaphragm 2, so as to ensure that the inside of the inner tube 1 is sealed and isolated from the outside to prevent the inside from getting wet. When the fire extinguishing device is triggered, since the sealing plug 7 is made of a soft rubber material or a silicone material, when it is subjected to internal pressure, the sealing plug 7 itself is squeezed and deformed, so that the barrier at the inner side of the card slot is squeezed and deformed, and finally the sealing plug 7 is pushed out of the spray hole, and then the fire extinguishing medium is released from the spray hole to extinguish the fire.

[0029] The sealing ring 3 and the end cover 4 are both provided with circular holes at their centers. The two circular holes are coaxial with the spray holes of the pressure relief diaphragm 2, and the area of ​​the circular holes is larger than the orthographic projection area of ​​the sealing plug 7 on the plane where the pressure relief diaphragm 2 is located (i.e., the area of ​​the circular holes is larger than any cross-sectional area of ​​the sealing plug 7), so as to ensure 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 holes. A sealing sticker 5 is pasted on the top of the end cover 4, and the sealing sticker 5 covers the circular holes of the end cover 4, which can effectively protect the end cover 4 and the pressure relief diaphragm 2, while ensuring the air tightness of the device. A plurality of tear grooves 21 are provided on the outside of the spray hole of the pressure relief diaphragm 2, and the thickness of the tear grooves 21 is less than the thickness of the pressure relief diaphragm 2. The thickness of the tear grooves 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 can be 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 weaker pressure bearing capacity, thereby achieving a safe pressure release effect and providing higher safety assurance.

[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, press the end cover 4 on the sealing ring 3, and the claw 41 at the lower end of the end cover 4 is vertically downward and parallel to the axial direction of the inner tube 1 in the initial state, and then close it through a closing machine, bend the claw 41 inward, so that it hooks on the flange 6 of the inner tube 1, so that the pressure relief diaphragm 2 and the sealing ring 3 are fixedly installed in this position, and finally the sealing sticker 5 is attached 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 utility model 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] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

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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