CN216536654U - Pressure relief device of hand-held fire extinguisher - Google Patents

Abstract

The utility model relates to a pressure relief device of a handheld fire extinguisher, which comprises a barrel for containing a fire extinguishing agent, wherein the upper end of the barrel is provided with an opening, the opening is provided with a flanging, the pressure relief device is sleeved at the opening and comprises a cover body and a pressure relief limiting structure, the cover body is used for being in sealing connection with the opening, and the pressure relief limiting structure is integrally formed with the cover body; the pressure relief limiting structure is sleeved outside the barrel, a circle of baffle ring is further arranged below the flange, and the pressure relief limiting structure is suitable for interfering with the baffle ring and the flange in the pressure relief process to prevent the cover body from being separated from the barrel. The utility model has two-stage pressure relief function, can greatly reduce the risk of the cover body being opened, thereby having better explosion-proof and explosion-relief performance and being safer and more reliable in use.

Description

Pressure relief device of handheld fire extinguisher

Technical Field

The utility model relates to the technical field of fire fighting equipment, in particular to a pressure relief device of a handheld fire extinguisher.

Background

At present, fire safety extinguishers used in public places mainly comprise dry powder extinguishers, water-based extinguishers and the like, and the extinguishers are high in storage requirement, large in mass and can only be fixedly stored, so that public safety treatment personnel are inconvenient to carry. In consideration of public fire safety, some public safety personnel are required to carry the fire extinguisher with them in order to deal with various sudden fire accidents.

The aerosol fire extinguisher is a fire extinguisher type which is found by people so far and can be made into a handheld and miniature fire extinguisher product, but the fire extinguisher can cause the phenomena of combustion performance reduction, nozzle blockage and the like due to long-time storage, and has the potential safety hazard of deflagration when in use. If the detonation happens, the gas pressure in the fire extinguisher rises sharply to form extra-high pressure gas, the cover body of the fire extinguisher is easily sprayed out to hurt people, and meanwhile, great recoil force can be generated, so that a user is injured, and great potential safety hazards are brought.

SUMMERY OF THE UTILITY MODEL

Therefore, the pressure relief device of the handheld fire extinguisher is needed to be provided, so that the fire extinguisher has explosion-proof and explosion-relief performance when in use, and the product is safer and more reliable.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

The utility model provides a pressure relief device of a handheld fire extinguisher, which is used for a small and miniature fire extinguisher, wherein the fire extinguisher comprises a cylinder body for containing a fire extinguishing agent, the upper end of the cylinder body is provided with an opening, the opening is provided with a flanging, the pressure relief device is sleeved at the opening and comprises a cover body and a pressure relief limiting structure, the cover body is used for being hermetically connected with the opening, the pressure relief limiting structure is integrally formed with the cover body, and the center of the cover body is provided with a nozzle; the pressure relief limiting structure is sleeved outside the barrel, a circle of baffle ring is further arranged below the flange, and the pressure relief limiting structure is suitable for interfering with the baffle ring and the flange in the pressure relief process to prevent the cover body from being separated from the barrel.

Preferably, the baffle ring consists of two or more baffle strips arranged at intervals; the pressure relief limiting structure is composed of pressure relief arms with corresponding quantity, and the two or more pressure relief arms are uniformly distributed around the outer part of the barrel.

Preferably, the pressure relief limiting structure further comprises connecting arms, the number of the connecting arms corresponds to that of the pressure relief arms, and each connecting arm penetrates through a gap between two blocking strips to be connected with the cover body and the corresponding pressure relief arm.

Preferably, the cross section of the barrier strip is U-shaped or V-shaped, so that an annular clamping groove is formed inside the barrier ring, and the pressure relief arm is suitable for being clamped into the clamping groove.

Preferably, the barrier strip is made of metal and is welded and fixed on the cylinder body.

Preferably, the cover body is fixed at the flanging through a press riveting process, and a gasket for sealing is arranged between the cover body and the flanging.

Preferably, the nozzle is a venturi nozzle.

The pressure relief limiting structure integrally formed with the cover body is arranged, and meanwhile, the blocking ring is arranged outside the barrel, so that the pressure relief limiting structure can be clamped at the blocking ring by utilizing the interference effect of the pressure relief limiting structure and the blocking ring when a nozzle is blocked and other accidents happen, if the pressure in the barrel is not completely released, the pressure relief limiting structure can move towards the opening after the blocking ring is damaged and then interferes with the flanging to be clamped and stopped by the flanging, therefore, the utility model has two-stage pressure relief functions, can greatly reduce the risk that the cover body is opened, and has better explosion-proof and explosion-venting performance and is safer and more reliable in use.

Drawings

FIG. 1 is a schematic view of the overall structure of a pressure relief device of a hand-held fire extinguisher according to the present embodiment;

fig. 2 is a schematic overall structure diagram of the pressure relief limiting structure in this embodiment;

FIG. 3 is a schematic cross-sectional view of the cylinder in this embodiment;

FIG. 4 is a schematic diagram of the first-stage explosion-proof effect in the present embodiment;

fig. 5 is a schematic diagram of the secondary explosion-proof effect in this embodiment.

The implementation of the objects of the present invention and their functions and principles will be further explained in the detailed description with reference to the attached drawings.

Detailed Description

The following description is further provided in conjunction with the accompanying drawings and the detailed description.

As shown in fig. 1, the present embodiment provides a pressure relief device 1 of a hand-held fire extinguisher, which can be used for a miniature fire extinguisher 100, especially a perfluorohexanone fire extinguisher powered by an aerosol gas generating agent. The fire extinguisher 100 comprises a cylinder body 2 for containing fire extinguishing agents and gas generating agents, wherein the upper end of the cylinder body 2 is provided with an opening 21 (shown in figure 3), a flanging 22 (shown in figure 3) is arranged at the opening, and the pressure relief device 1 is sleeved at the opening 21.

Specifically, the pressure relief device 1 includes a cover 11 for sealing connection with the opening 21 and a pressure relief limiting structure 12 integrally formed with the cover 11, and a nozzle 13 is disposed in the center of the cover 11. The pressure relief limiting structure 12 is sleeved outside the barrel 2, a ring of blocking ring 23 is further arranged below the flange 22, and the pressure relief limiting structure 12 is suitable for forming interference with the blocking ring 23 and the flange 22 in the pressure relief process so as to prevent the cover body 11 from being separated from the barrel 2 to hurt people.

Referring to fig. 2, the cover 11 of the present embodiment is made of a metal material, the lower edge of the cover 11 is provided with a plurality of jaws 111, the jaws 111 can be fixed at the flange 22 by a clinching process, and a gasket (not shown) for sealing is provided between the cover 11 and the flange 22, so that the cover 11 can be firmly fixed at the opening 21 of the cylinder 2. When the fire extinguisher needs to be used, the aerosol gas generating agent in the cylinder body 2 can be ignited, the gas generating agent can generate a large amount of aerosol instantly, so that an extra-high pressure state is formed in the cylinder body 2, and the perfluorohexanone fire extinguishing agent in the cylinder body is sprayed out from the nozzle 13 to realize fire extinguishing.

The nozzle 13 of the embodiment adopts a venturi nozzle, which can make the sprayed fire extinguishing agent have very high speed and is beneficial to quickly extinguishing fire.

Referring to fig. 1 and 3, the retaining ring 23 is composed of two or more retaining strips 231 arranged at intervals, the pressure relief limiting structure 12 is also composed of a corresponding number of pressure relief arms 121, and the embodiment adopts a structure of 3 retaining strips 231. The 3 pressure relief arms 121 are evenly arranged around the outside of the cylinder 2 to form an annular structure which is broken into 3 sections.

Meanwhile, the pressure relief limiting structure 12 further includes connecting arms 122, the number of which corresponds to that of the pressure relief arms 121, and in this embodiment, the number of the connecting arms 122 is also 3. Each connecting arm 122 passes through the gap between two blocking strips 231 to connect the cover 11 and the middle of the corresponding pressure relief arm 121, so that the pressure relief limiting structure 12 is similar to an inverted T shape.

In this embodiment, the cross section of the blocking strip 231 is U-shaped or V-shaped, so that an annular clamping groove 232 is formed inside the blocking ring 23, and the pressure relief arm 121 is suitable for being clamped into the clamping groove 232, thereby playing a role in preventing the pressure relief limiting structure 11 from moving forward.

Preferably, the barrier strip 231 is made of metal and is welded and fixed on the cylinder 2. The metal material can be steel, aluminum alloy section and other materials, and can bear larger pulling force due to the harder texture of the metal material.

The working principle of the pressure relief device of the hand-held fire extinguisher according to the present embodiment is explained in detail as follows.

When the fire extinguisher 100 is not in use, the pressure relief device 1 is in the position shown in figure 1. When the internal gas pressure rises sharply due to a nozzle clogging or the like during use, the pressure relief device 1 of the present embodiment starts to operate.

Firstly, the extra-high pressure gas in the cylinder strongly impacts the cover body 11, so that the claws 111 pressed and riveted at the flanging 22 on the cover body 11 deform and loosen, the cover body 11 and the pressure relief limiting structure 12 move forwards under the impact force of the gas, and when the cover body moves to the position shown in fig. 4, the pressure relief arms 121 are clamped in the retaining rings 23. At this time, the opening 21 of the cylinder 2 is opened to some extent, and the fire extinguisher 100 can be depressurized.

If the impact force applied to the cover 11 is smaller than the supporting force that the retainer ring 23 can provide to the pressure relief arm 121, the pressure relief device 1 will not move until the explosion relief stops.

If the impact force applied to the cover 11 is still larger than the supporting force that the stop ring 23 can provide to the pressure relief arm 121, the pressure relief arm 121 breaks the stop ring 23, and then the pressure relief limiting structure 12 continues to move forward until the position shown in fig. 5 is reached. At this time, the pressure relief arm 121 is blocked by the turned-over edge 22, and the opening 21 of the cylinder 2 is completely opened, so that the fire extinguisher 100 can quickly relieve the pressure, and the impact force on the cover 11 is rapidly weakened, therefore, the pressure relief device 1 is finally stopped at the position, thereby protecting the cover 11 from being ejected forwards, and eliminating the potential safety hazard.

Can also discover through the above, the pressure relief device 1 of this embodiment is safe and reliable not only, simple structure moreover, and processing is convenient.

In summary, the pressure relief limiting structure integrally formed with the cover body is arranged, and meanwhile, the blocking ring is arranged outside the barrel, so that the interference effect of the pressure relief limiting structure and the blocking ring can be utilized when a nozzle is blocked and other accidents happen, the pressure relief limiting structure is clamped at the blocking ring, if the pressure in the barrel is not completely released, the pressure relief limiting structure can move towards the opening after the blocking ring is damaged and then interferes with the flanging to be clamped and stopped by the flanging, and therefore the anti-explosion and anti-explosion device has two-stage pressure relief functions, can greatly reduce the risk of the cover body being flushed, and has better anti-explosion and anti-explosion performance and is safer and more reliable in use.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (7)

1. The utility model provides a pressure relief device of hand-held type fire extinguisher for little miniature fire extinguisher, the fire extinguisher is including the barrel that is used for the splendid attire fire extinguishing agent, the upper end of barrel has an opening, the opening part is provided with the turn-ups, the pressure relief device cover is located opening part, its characterized in that: the pressure relief device comprises a cover body and a pressure relief limiting structure, wherein the cover body is used for being in sealing connection with the opening, the pressure relief limiting structure is integrally formed with the cover body, and a nozzle is arranged in the center of the cover body; the pressure relief limiting structure is sleeved outside the barrel, a circle of baffle ring is further arranged below the flange, and the pressure relief limiting structure is suitable for interfering with the baffle ring and the flange in the pressure relief process to prevent the cover body from being separated from the barrel.

2. The pressure relief device for a hand-held fire extinguisher as claimed in claim 1, wherein: the baffle ring consists of two or more baffle strips arranged at intervals; the pressure relief limiting structure is composed of pressure relief arms with corresponding quantity, and the two or more pressure relief arms are uniformly distributed around the outer part of the cylinder body.

3. The pressure relief device for a hand-held fire extinguisher as claimed in claim 2, wherein: the pressure relief limiting structure further comprises connecting arms, the number of the connecting arms corresponds to that of the pressure relief arms, and each connecting arm penetrates through two gaps between the barrier strips to be connected with the cover body and the corresponding pressure relief arm.

4. The pressure relief device for a hand-held fire extinguisher as claimed in claim 2, wherein: the cross section of the barrier strip is U-shaped or V-shaped, so that an annular clamping groove is formed in the blocking ring, and the pressure relief arm is suitable for being clamped into the clamping groove.

5. The pressure relief device for a hand-held fire extinguisher as claimed in claim 4, wherein: the barrier strip is made of metal and is welded and fixed on the cylinder body.

6. The pressure relief device for a hand-held fire extinguisher as claimed in claim 1, wherein: the cover body is fixed at the flanging position through a pressure riveting process, and a gasket for sealing is arranged between the cover body and the flanging.

7. The pressure relief device for a hand-held fire extinguisher as claimed in claim 1, wherein: the nozzle is a venturi nozzle.

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