Forest fire shelter of closed circuit type

Abstract

The utility model relates to a forest fire shelter of closed-circuit oxygen breathing type, and relates to a forest fire shelter. The utility model discloses a kind of forest fire shelter, to solve the problem that existing fire shelter cannot block outside flue gas and smoke dust from entering its inside when ground is uneven. The utility model is simple to operate, when using in the case of uneven ground, avoid firemen inhale high-temperature and harmful flue gas and smoke dust, provide protection for the life safety of firemen: when in critical fire environment, firemen deploy fire shelter, lie into cover with head towards storage pouch in prone position, then take out closed-circuit breathing unit in storage pouch. Gas mask is worn on face, the size of gas supply is adjusted in real time by rotating valve on gas supply tank, exhaled gas enters carbon dioxide adsorption tank through exhalation valve, adsorbent in its interior absorbs carbon dioxide, and remaining exhaled gas continues to participate in respiratory cycle. The utility model belongs to the technical field of forest fire fighting.

Description

Technical Field

[0001] This utility model relates to a forest fire shelter, specifically a closed-loop breathing oxygen supply type forest fire shelter, belonging to the field of forest fire prevention technology. Background Technology

[0002] Fire shelters play a vital role in forest fire prevention, providing firefighters with a safe, enclosed space in the presence of flames and hot air currents. In critical fire situations, firefighters can unfold the shelter and quickly lie down inside in a prone position.

[0003] Although fire shields can isolate hot airflows, in actual use, due to uneven ground, high-temperature and harmful fumes (such as carbon monoxide and carbon dioxide) and dust can still enter the fire shield from the bottom, thus endangering the lives of firefighters.

[0004] In summary, how to propose a novel fireproof cover to address the aforementioned technical problems has become a pressing issue for those skilled in the art. Utility Model Content

[0005] This invention addresses the shortcomings of the prior art by providing a closed-loop breathing oxygen supply type forest fire cover.

[0006] The technical solution of this utility model is: a closed-loop breathing oxygen supply type forest fire shelter, including a storage bag sewn onto the inner surface of the fire shelter, and a closed-loop breathing unit stored in the storage bag.

[0007] The closed-circuit breathing unit includes a gas mask, a carbon dioxide adsorption canister, a three-way connector, and a gas supply canister.

[0008] The gas mask is equipped with an inhalation valve and an exhalation valve, with the exhalation valve connected to the inlet of the carbon dioxide adsorption canister.

[0009] The three ports of the tee connector are respectively connected to the outlets of the gas supply tank, the intake valve, and the carbon dioxide adsorption tank.

[0010] Furthermore, it also includes a flap, which is sewn onto the inner surface of the fireproof cover and is attached to the opening of the storage pocket by Velcro.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. This utility model is simple to operate and, when used on uneven ground, prevents firefighters from inhaling high-temperature and harmful fumes and dust, thus ensuring their safety.

[0013] When in a critical fire situation, firefighters unfold the fire shield, face the storage bag 110, lie down in the shield in a prone position, and then take out the closed-circuit breathing unit 200 from the storage bag 110.

[0014] Wearing the gas mask 210 on the face, the gas supply volume is adjusted in real time by rotating the valve on the gas supply tank 250. The exhaled gas enters the carbon dioxide adsorption tank 220 through the exhalation valve 212. The adsorbent inside (such as calcium hydroxide, lithium hydroxide or sodium hydroxide) absorbs the carbon dioxide, and the remaining exhaled gas continues to participate in the respiratory cycle, fundamentally preventing firefighters from inhaling smoke and dust. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the storage pocket 110 and the pocket cover 120 of this utility model;

[0016] Figure 2 This is a schematic diagram of the closed-circuit breathing unit 200 of this utility model;

[0017] Figure 3 This is a schematic diagram of the inhalation valve 211 and the exhalation valve 212 of this utility model;

[0018] Figure 4 This is an isometric view of the gas mask 210 of this utility model.

[0019] In the diagram: 110, storage bag; 120, bag cover; 200, closed-circuit breathing unit; 210, gas mask; 210-1, mouth and nose mask; 211, inhalation valve; 212, exhalation valve; 213, grid seat; 214, membrane flap; 215, grid cover; 220, carbon dioxide adsorption canister; 230, tee connector; 250, gas supply canister. Detailed Implementation

[0020] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings in this embodiment.

[0021] Specific implementation method one: Combining Figures 1 to 4 This embodiment describes a closed-circuit breathing oxygen supply type forest fire shelter, which includes a storage pocket 110 sewn onto the inner surface of the fire shelter, and a closed-circuit breathing unit 200 stored in the storage pocket 110.

[0022] The closed-circuit breathing unit 200 includes a gas mask 210, a carbon dioxide adsorption canister 220, a three-way connector 230, and an air supply canister 250. The air supply canister 250 uses a portable oxygen cylinder from the prior art, such as the portable oxygen cylinder disclosed in patent number CN200520007820.X. When used in the inflated state, the gas inside the cylinder flows along the inner wall of the piston chamber to the airway by rotating the valve switch knob. The amount of gas flow can be freely adjusted by the user through the valve switch knob.

[0023] The gas mask 210 is equipped with an inhalation valve 211 and an exhalation valve 212, with the exhalation valve 212 connected to the inlet of the carbon dioxide adsorption canister 220.

[0024] The three ports of the tee connector 230 are respectively connected to the outlets of the gas supply tank 250, the air intake valve 211, and the carbon dioxide adsorption tank 220.

[0025] Specific Implementation Method Two: Combining Figure 1 This embodiment also includes a flap 120, which is sewn onto the inner surface of the fireproof cover and attached to the opening of the storage pocket 110 via Velcro. Other components and connections are the same as in Specific Embodiment One.

[0026] Specific implementation method three: Combining Figures 2 to 4 This embodiment describes a full-face gas mask 210.

[0027] Furthermore, the gas mask 210 is integrated with a mouth and nose mask 210-1, which divides the inner cavity of the gas mask 210 into a breathing chamber and a visual chamber. The inhalation valve 211 and the exhalation valve 212 are both connected to the breathing chamber. This arrangement prevents water vapor in the exhaled air from fogging on the lens of the visual chamber and affecting vision.

[0028] Furthermore, both the inhalation valve 211 and the exhalation valve 212 include a grid seat 213, a membrane flap 214, and a grid cover 215 arranged coaxially in sequence.

[0029] A limiting post is integrally provided on the grid seat 213, and the membrane flap 214 is sleeved on the limiting post. The grid cover 215 is connected to the grid seat 213 by threads. With this configuration, when the user breathes, the soft texture and deformable properties of the membrane flap 214 are used to achieve unidirectional airflow: when inhaling, the breathing chamber is under negative pressure, the membrane flap 214 in the exhalation valve 212 is pressed tightly by the negative pressure, and the membrane flap 214 in the inhalation valve 211 is opened by the negative pressure, and air enters the breathing chamber; when exhaling, the breathing chamber is under positive pressure, the membrane flap 214 in the inhalation valve 211 is pressed tightly by the positive pressure, and the membrane flap 214 in the exhalation valve 212 is blown open by the positive pressure, and the exhaled gas is discharged from the breathing chamber.

[0030] The other components and connections are the same as in specific implementation method one or two.

[0031] Working principle

[0032] Combination Figures 1 to 4 Explanation of the working principle of this utility model:

[0033] The fire shield is unfolded, and the firefighters lie face down inside the storage bag 110 with their heads facing the shield. Then, the closed-circuit breathing unit 200 is taken out from the storage bag 110.

[0034] Wear the gas mask 210 on your face and adjust the gas supply in real time by rotating the valve on the gas supply canister 250. The exhaled gas enters the carbon dioxide adsorption canister 220 through the exhalation valve 212. The adsorbent inside (such as calcium hydroxide, lithium hydroxide or sodium hydroxide) absorbs the carbon dioxide, and the remaining exhaled gas continues to participate in the respiratory cycle.

[0035] During use, the air exhaled by firefighters is not directly released into the outside, and firefighters do not inhale outside air, thus ensuring the safety of firefighters.

[0036] The present invention has been disclosed above with reference to preferred embodiments, but it is not intended to limit the present invention. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A closed-circuit breathing oxygen supply type forest fire shelter, characterized in that: Includes a storage pocket (110) sewn onto the inner surface of the fireproof cover, and the storage pocket (110) stores a closed-circuit breathing unit (200). The closed-circuit breathing unit (200) includes a gas mask (210), a carbon dioxide adsorption canister (220), a three-way connector (230), and a gas supply canister (250). The gas mask (210) is equipped with an inhalation valve (211) and an exhalation valve (212), and the exhalation valve (212) is connected to the inlet of the carbon dioxide adsorption canister (220); The three ports of the three-way connector (230) are respectively connected to the outlets of the gas supply tank (250), the air intake valve (211), and the carbon dioxide adsorption tank (220).

2. The closed-circuit breathing oxygen supply type forest fire shelter according to claim 1, characterized in that: It also includes a flap (120) which is sewn onto the inner surface of the fireproof cover and is attached to the opening of the storage pocket (110) by Velcro.

3. A closed-circuit breathing oxygen supply type forest fire shelter according to claim 2, characterized in that: The gas mask (210) is a full-face gas mask.

4. A closed-circuit breathing oxygen supply type forest fire shelter according to claim 3, characterized in that: The gas mask (210) has an integrated mouth and nose mask (210-1).

5. A closed-circuit breathing oxygen supply type forest fire shelter according to claim 4, characterized in that: The inhalation valve (211) and the exhalation valve (212) each include a grid seat (213), a diaphragm flap (214) and a grid cover (215) arranged coaxially in sequence. A limiting post is integrally provided on the grid seat (213), the membrane flap (214) is sleeved on the limiting post, and the grid cover (215) is connected to the grid seat (213) by threads.

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