Fire-fighting self-rescue respirator with air purification function

Abstract

The invention relates to the technical field of fire-fighting self-rescue respirators, in particular to a fire-fighting self-rescue respirator with an air purification function, which comprises a head cover, a primary filtering mechanism and a filter changing mechanism, an observation window is mounted on the head cover, an elastic band is fixedly mounted at the bottom of the head cover, and the primary filtering mechanism is arranged to filter the air in the air. According to the air purification device, the primary filter cloth is arranged, so that external air firstly passes through the primary filter cloth to intercept large-particle smoke dust and impurities and then enters the purification filter tip to be secondarily purified, and therefore the effects that the filtering burden of the purification filter tip is relieved, the service life of the purification filter tip is prolonged, the breathing resistance is reduced, and the breathing smoothness is guaranteed are achieved, and a filter replacing mechanism composed of a first fixing block, a clamping block, an L-shaped block and an elastic piece is adopted; and in cooperation with the limiting effect of an anti-deviation rod on the sliding direction of an L-shaped block, tool-free rapid disassembly and assembly of the primary filter assembly are achieved, and therefore the effects that the filter replacement operation process is simplified, the filter replacement time is shortened, and the use requirements of fire emergency escape scenes are met are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fire self-rescue breathing apparatus, in particular to a fire self-rescue breathing apparatus with air purification function. BACKGROUND

[0002] In an emergency scene such as fire, the fire self-rescue breathing apparatus is the key equipment to ensure personnel escape, and its core function is to provide clean and safe breathing air for the user and isolate the outside smoke, toxic and harmful gases. The existing fire self-rescue breathing apparatus is usually equipped with a single purification filter to filter air, but in a smoky environment, a large amount of large-particle smoke in the air can easily block the purification filter, resulting in a shortened service life of the filter, increased breathing resistance, and even affecting the smoothness of breathing, which threatens the safety of the user in escaping.

[0003] At the same time, although some existing breathing apparatuses attempt to add a primary filter structure, the primary filter components are mostly fixed and integrated, which are inconvenient to disassemble and replace. When the primary filter material is saturated, it cannot be quickly updated, making it difficult to ensure continuous primary filtering effect. In addition, a few breathing apparatuses with replaceable primary filters have complex filter replacement mechanisms that require the use of tools. In the high-pressure scene of fire emergency escape, the operation is tedious and time-consuming, which is not convenient for the user to quickly complete the replacement and continue to escape.

[0004] In addition, the locking and unlocking structure of the existing filter replacement mechanism is not stable enough, and the primary filter structure may fall off due to locking failure during the shaking and collision in the escape process, further reducing the use reliability of the breathing apparatus. Therefore, it is an important requirement to develop a fire self-rescue breathing apparatus with efficient primary filtering function and a primary filter assembly that can be quickly and conveniently replaced and locked stably to improve the fire escape protection capability. SUMMARY

[0005] The purpose of the present application is to provide a fire self-rescue breathing apparatus with air purification function to solve the problems raised in the background.

[0006] The technical solution adopted by the present application to solve its technical problems is: a fire self-rescue breathing apparatus with air purification function, comprising: a head cover, an observation window is installed on the head cover, and an elastic band is fixedly installed at the bottom of the head cover, further comprising:

[0007] A primary filter mechanism is arranged on the side of the head cover close to the observation window, the primary filter mechanism comprises a fixed cover, a recess is formed in the fixed cover, a primary filter assembly is installed in the recess, and the primary filter mechanism is used to preliminarily filter external air;

[0008] The filter changing mechanism is symmetrically arranged on the fixed cover, the filter changing mechanism comprises a fixed block one which is symmetrically and fixedly arranged on the outer surface of the fixed cover, a movable groove is formed in the fixed block one, a clamping block is movably arranged in the movable groove, a fixed block two is arranged on one side of the fixed block one, and a clamping groove is formed in one side of the fixed block two close to the clamping block.

[0009] Preferably, a fixed seat is fixedly arranged on one side of the head cover close to the observation window, and a purification filter is fixedly installed on the fixed seat.

[0010] Preferably, the groove opening of the fixed cover faces one side of the head cover, a through groove one and a through groove two are formed in the fixed cover in a penetrating manner, the through groove one is located on the outer side of the fixed cover, and the through groove two is located on the inner side of the fixed cover.

[0011] Preferably, the primary filter assembly in the groove comprises a pair of fixed rings, a pair of supporting rods are fixedly and jointly connected between the fixed rings, and primary filter cloth is fixedly and jointly connected to the side walls of the supporting rods.

[0012] Preferably, the primary filter cloth is located between the through groove one and the through groove two, the through groove one is used for passing un-filtered air, and the through groove two is used for passing filtered air.

[0013] Preferably, an L-shaped groove is formed in the fixed block one, the L-shaped groove and the movable groove are in communication with each other, and an L-shaped block is movably arranged in the L-shaped groove.

[0014] Preferably, a cylindrical groove one is formed in the L-shaped block, a cylindrical groove two is formed in the bottom of the cylindrical groove one through the L-shaped block, and the cylindrical groove one and the cylindrical groove two are concentrically arranged.

[0015] Preferably, a fixed rod is fixedly arranged on the groove wall of the L-shaped groove, and the outer surface of the fixed rod slides in the inner wall of the cylindrical groove two.

[0016] Preferably, an elastic member is sleeved on the outer surface of the fixed rod, the outer wall of the elastic member is directly matched with the cylindrical groove one, and the elastic member is limited by the cylindrical groove one.

[0017] Preferably, a through hole is formed in the L-shaped block in a penetrating manner, an anti-deviation rod is arranged in the through hole, the anti-deviation rod is fixedly installed in the L-shaped groove, and the outer surface of the anti-deviation rod is in sliding connection with the through hole.

[0018] The beneficial effects of the present application are as follows:

[0019] The fire self-rescue breathing apparatus with air purification function provided by the application has the effects of reducing the filtering burden of the purification filter, prolonging the service life of the purification filter, reducing the respiratory resistance, and ensuring the smoothness of breathing.

[0020] The fire self-rescue breathing apparatus with air purification function provided by the application has the effects of simplifying the filter replacement operation process, shortening the filter replacement time, and adapting to the use requirements of the fire emergency escape scene.

[0021] The fire self-rescue breathing apparatus with air purification function provided by the application has the effects of improving the locking stability of the filter replacement mechanism, preventing the initial filter structure from falling off due to bumping and collision during the escape process, and ensuring the reliability of the breathing apparatus.

[0022] In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages. The application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the application;

[0024] Figure 2 It is an enlarged structural schematic diagram of position A in the application; Figure 1

[0025] Figure 3 It is another schematic diagram of the overall structure of the application;

[0026] Figure 4 It is an exploded structural schematic diagram of the initial filter mechanism of the application;

[0027] Figure 5 It is a structural schematic diagram of the fixed cover of the application;

[0028] Figure 6 It is a cutaway structural schematic diagram of the filter replacement mechanism of the application;

[0029] Figure 7 It is an enlarged structural schematic diagram of position B in the application. Figure 6

[0030] FIG. 1 shows a schematic diagram of the overall structure of the application.

[0031] ​​1, head cover; 2, observation window; 3, elastic band; 4, fixed seat; 5, purification filter; 6, fixed cover; 7, groove; 8, through slot one; 9, through slot two; 10, fixed ring; 11, support rod; 12, primary filter cloth; 13, fixed block one; 14, movable slot; 15, clamping block; 16, L-shaped slot; 17, fixed block two; 18, clamping slot; 19, L-shaped block; 20, cylindrical slot one; 21, cylindrical slot two; 22, fixed rod; 23, elastic member; 24, through hole; 25, anti-deviation rod. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0034] Please refer to Figures 1 to 7 A fire-fighting self-rescue breathing apparatus with air purification function comprises a head cover 1, an observation window 2 is installed on the head cover 1, an elastic band 3 is fixedly installed at the bottom of the head cover 1, a fixed seat 4 is fixedly arranged on one side of the head cover 1 close to the observation window 2, a purification filter 5 is fixedly installed on the fixed seat 4, and a fixed cover 6 is sleeved on the outer surface of the purification filter 5.

[0035] In the above embodiment, the head cover 1 is a cover structure that fits the human head, and the observation window 2 is embeddedly installed at the front end of the head cover 1, which is convenient for the user to observe the external environment; the elastic band 3 is fixedly assembled at the bottom edge of the head cover 1, and through the elastic tightening action of the elastic band 3, the head cover 1 can be stably fitted on the user's head, avoiding the penetration of smoke from the bottom gap. The fixed seat 4 is fixedly arranged on the outer wall of the head cover 1 close to the observation window 2, the purification filter 5 is fixed on the fixed seat 4 by bolt fastening or buckle connection, and the air inlet end of the purification filter 5 faces outward, and the air outlet end is in communication with the inside of the head cover 1; the fixed cover 6 is adaptively sleeved on the outer surface of the purification filter 5, realizing the protection and sealing of the purification filter 5.

[0036] Please refer to Figures 1 to 6 The fire-fighting self-rescue breathing apparatus with air purification function further comprises a primary filtering mechanism, which is arranged on one side of the head cover 1 close to the observation window 2, and the primary filtering mechanism comprises a fixed cover 6, a groove 7 is formed in the fixed cover 6, a primary filtering assembly is installed in the groove 7, and the primary filtering mechanism is used for preliminarily filtering external air.

[0037] The groove 7 of the fixed cover 6 is open towards the side of the head cover, and the through groove one 8 and the through groove two 9 are provided through the fixed cover 6. The through groove one 8 is located on the outside of the fixed cover 6 and is in communication with the outside environment. The through groove two 9 is located on the inside of the fixed cover 6 and is in communication with the air inlet end of the purification filter 5. The primary filter cloth 12 is just located on the airflow channel between the through groove one 8 and the through groove two 9.

[0038] In the above embodiment, the primary filtering mechanism is integrally arranged on the side of the head cover 1 close to the observation window 2, and is arranged corresponding to the air inlet end of the purification filter 5. The core component is the fixed cover 6, which is connected with the outer wall of the head cover 1 by welding or bolt fixing. The fixed cover 6 is provided with a groove 7 on the side facing the head cover 1. The groove 7 is corresponding to the position of the fixed cover 6, and the primary filtering assembly is assembled in the groove 7. The primary filtering assembly is composed of a pair of parallel fixed rings 10, two supporting rods 11 and a primary filter cloth 12. The two supporting rods 11 are symmetrically distributed in the diameter direction of the fixed ring 10, and the two ends of the supporting rod 11 are fixedly connected with the inner walls of the two fixed rings 10, respectively. The primary filter cloth 12 is laid and fixed between the two supporting rods 11 to form a complete filtering surface. The groove 7 of the fixed cover 6 is open towards the side of the head cover 1, and the through groove one 8 and the through groove two 9 are provided through the fixed cover 6. The through groove one 8 is located on the outside of the fixed cover 6 and is in communication with the outside environment. The through groove two 9 is located on the inside of the fixed cover 6 and is in communication with the air inlet end of the purification filter 5. The primary filter cloth 12 is just located on the airflow channel between the through groove one 8 and the through groove two 9.

[0039] Please refer to Figures 1 to 7 The fire-fighting self-rescue respirator with air purification function further comprises a filter replacement mechanism, which is symmetrically arranged on the fixed cover 6. The filter replacement mechanism comprises a fixed block one 13 symmetrically fixed on the outer surface of the fixed cover 6. The fixed block one 13 is provided with a movable groove 14. A clamping block 15 is movably arranged in the movable groove 14. A fixed block two 17 is arranged on one side of the fixed block one 13. A clamping groove 18 is arranged on the side of the fixed block two 17 close to the clamping block 15.

[0040] Further, the fixed block 13 is provided with an L-shaped slot 16, the L-shaped slot 16 is communicated with the movable slot 14, and an L-shaped block 19 is movably arranged in the L-shaped slot 16. The L-shaped block 19 is provided with a cylindrical slot 20, the bottom of the cylindrical slot 20 is provided with a cylindrical slot 21 through the L-shaped block 19, and the cylindrical slot 20 and the cylindrical slot 21 are concentrically arranged. The slot wall of the L-shaped slot 16 is fixedly provided with a fixed rod 22, and the outer surface of the fixed rod 22 is slidably arranged in the inner wall of the cylindrical slot 21. The outer surface of the fixed rod 22 is sleeved with an elastic element 23, the outer wall of the elastic element 23 is directly matched with the cylindrical slot 20, and the elastic element 23 is limited by the cylindrical slot 20. The L-shaped block 19 is provided with a through hole 24, and a deviation preventing rod 25 is arranged in the through hole 24. The deviation preventing rod 25 is fixedly arranged in the L-shaped slot 16, and the outer surface of the deviation preventing rod 25 is slidably connected with the inner wall of the through hole 24.

[0041] In the above embodiment, the filter changing mechanism is symmetrically arranged on both sides of the fixed cover 6, and is used for realizing quick dismounting and replacing of the primary filter assembly. The filter changing mechanism comprises the fixed block 13, the clamping block 15, the fixed block 17, the L-shaped block 19, the fixed rod 22, the elastic element 23 and the deviation preventing rod 25. The fixed block 13 is symmetrically welded on the outer surface of the fixed cover 6. The fixed block 13 is provided with a movable slot 14 extending in the horizontal direction. The clamping block 15 is embedded in the movable slot 14 and can slide in the movable slot 14. The fixed block 17 is fixedly arranged on one side of the outer wall of the head cover 1 corresponding to the fixed block 13. The end surface of the fixed block 17 close to the clamping block 15 is provided with a clamping slot 18 matched with the clamping block 15. The clamping block 15 can be embedded in the clamping slot 18 to realize the locking of the fixed cover 6 and the head cover 1. The fixed block 13 is further provided with an L-shaped slot 16. One end of the L-shaped slot 16 is communicated with the movable slot 14, and the other end extends to the outer side wall of the fixed block 13. The L-shaped block 19 is movably arranged in the L-shaped slot 16. The L-shaped block 19 is provided with a cylindrical slot 20 along the length direction thereof. The bottom of the cylindrical slot 20 is provided with a cylindrical slot 21. The cylindrical slot 20 and the cylindrical slot 21 are concentrically arranged. The inner diameter of the cylindrical slot 20 is larger than the inner diameter of the cylindrical slot 21. The slot wall of the L-shaped slot 16 is fixedly provided with a fixed rod 22. The axis of the fixed rod 22 is consistent with the axes of the cylindrical slot 20 and the cylindrical slot 21. The outer surface of the fixed rod 22 is slidably matched with the inner wall of the cylindrical slot 21. The elastic element 23 is sleeved on the outer surface of the fixed rod 22. One end of the elastic element 23 abuts against the slot wall of the L-shaped slot 16, and the other end abuts against the bottom of the cylindrical slot 20. The outer wall of the elastic element 23 is matched with the inner wall of the cylindrical slot 20 and is limited by the cylindrical slot 20. The L-shaped block 19 is further provided with a through hole 24 extending along the length direction thereof. The deviation preventing rod 25 is fixedly arranged in the L-shaped slot 16. The outer surface of the deviation preventing rod 25 is slidably connected with the inner wall of the through hole 24, so as to limit the sliding direction of the L-shaped block 19 and avoid the deviation of the L-shaped block 19.

[0042] Through the above all embodiments, the working principle of the present application is as follows:

[0043] 1. Air purification process: when the user wears the respirator, the external air containing smoke dust and harmful particles first enters the primary filter mechanism to complete the preliminary filtration. Specifically, the external air enters the cavity between the fixed cover 6 and the purification filter 5 through the through slot one 8 on the outside of the fixed cover 6, and then the airflow passes through the primary filter cloth 12 between the through slot one 8 and the through slot two 9. The primary filter cloth 12 can intercept large particle smoke dust and impurities in the air to achieve preliminary purification of the air; the air after preliminary filtration enters the purification filter 5 through the through slot two 9, and the filter material (such as activated carbon, high-efficiency filter cotton, etc.) inside the purification filter 5 further adsorbs toxic and harmful gases and small particles in the air to complete secondary purification; finally, the purified clean air enters the inside of the head cover 1 through the air outlet end of the purification filter 5 for the user to breathe.

[0044] 2. Replacement process of primary filter assembly: when the primary filter cloth 12 decreases the filtering efficiency due to intercepting a large amount of impurities, the primary filter assembly can be quickly replaced through the filter replacement mechanism. The specific operation is as follows: first, pull the L-shaped block 19 outward, and the L-shaped block 19 slides along the L-shaped slot 16. The slot bottom of the cylindrical slot one 20 of the L-shaped block 19 exerts pressure on the elastic member 23, causing the elastic member 23 to shrink and deform; at the same time, one end of the L-shaped block 19 pushes the clamping block 15 in the movable slot 14, causing the clamping block 15 to slide away from the fixed block two 17 along the movable slot 14 until the clamping block 15 completely separates from the clamping slot 18 on the fixed block two 17, at which time the locking state of the fixed cover 6 and the head cover 1 is released; then the user can take off the fixed cover 6 from the head, take out the primary filter assembly in the groove 7, and replace the new primary filter assembly (i.e. embed the fixing ring 10 of the new primary filter assembly in the groove 7 to realize positioning); after replacement is completed, the fixed cover 6 is reset so that the fixed block one 13 and the fixed block two 17 are aligned, and then the L-shaped block 19 is loosened. The elastic member 23 is reset under the action of its own elastic force, pushing the L-shaped block 19 to slide reversely, and the L-shaped block 19 drives the clamping block 15 to re-embed in the clamping slot 18 of the fixed block two 17, completing the locking of the fixed cover 6, that is, the replacement of the primary filter assembly is completed.

[0045] 3. Auxiliary protection principle: the elastic band 3 at the bottom of the head cover 1 can make the head cover 1 closely fit the user's head, reducing the penetration of external smoke; the observation window 2 is made of high-temperature-resistant and anti-fog materials to ensure that the user can still clearly observe the external situation in a fire environment, facilitating escape; the anti-deviation rod 25 in the filter replacement mechanism can ensure the stability of the sliding process of the L-shaped block 19, avoiding the locking failure of the fixed cover 6 due to the deviation of the clamping block 15, and improving the use reliability of the respirator.

[0046] Those skilled in the art should understand: the discussion of the above any embodiment is only exemplary, and the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the application as described above. In order to be brief, they are not provided in details.

[0047] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any one of the above-described and other features can be employed in any feasible combination, and any omission, substitution, or change in any of the above-described features or any other technical features can be made without departing from the spirit and scope of the present application.

Claims

1. A fire self-rescue breathing apparatus with air purification function, comprising: A head cover (1) is provided with an observation window (2), and an elastic band (3) is fixedly installed at the bottom of the head cover (1). The head cover (1) is characterized by further comprising: The primary filter mechanism is located on the side of the head cover (1) near the observation window (2). The primary filter mechanism includes a fixed cover (6) with a groove (7) on the fixed cover (6). A primary filter assembly is installed in the groove (7). The primary filter mechanism is used to perform preliminary filtration of the outside air. The filter replacement mechanism is symmetrically arranged on the fixed cover (6). The filter replacement mechanism includes a first fixed block (13) symmetrically fixed on the outer surface of the fixed cover (6). The first fixed block (13) has a movable groove (14) and a locking block (15) is movably arranged in the movable groove (14). A second fixed block (17) is arranged on one side of the first fixed block (13). The second fixed block (17) has a locking groove (18) on the side of the second fixed block (17) near the locking block (15).

2. A fire self-rescue breathing apparatus with air purification function according to claim 1, characterized in that, The head cover (1) is fixedly provided with a fixing seat (4) on the side near the observation window (2), and a purification filter (5) is fixedly installed on the fixing seat (4). The fixing cover (6) is sleeved on the outer surface of the purification filter (5).

3. A fire self-rescue breathing apparatus with air purification function according to claim 2, characterized in that, The groove (7) of the fixed cover (6) faces the headgear side. The fixed cover (6) is provided with a through groove one (8) and a through groove two (9). The through groove one (8) is located on the outside of the fixed cover (6), and the through groove two (9) is located on the inside of the fixed cover (6).

4. A fire self-rescue breathing apparatus with air purification function according to claim 3, characterized in that, The primary filter assembly in the groove (7) includes a pair of fixing rings (10), and a pair of support rods (11) are fixedly connected between the fixing rings (10). The side walls of the support rods (11) are all fixedly connected with primary filter cloth (12).

5. A fire self-rescue breathing apparatus with air purification function according to claim 4, characterized in that, The primary filter cloth (12) is located between the first through groove (8) and the second through groove (9). The first through groove (8) is used to pass through unfiltered air, and the second through groove (9) is used to pass through filtered air.

6. A fire self-rescue breathing apparatus with air purification function according to claim 1, characterized in that, The fixed block (13) is provided with an L-shaped groove (16), which is connected to the movable groove (14). An L-shaped block (19) is movably arranged in the L-shaped groove (16).

7. A fire self-rescue breathing apparatus with air purification function according to claim 6, characterized in that, The L-shaped block (19) has a cylindrical groove 1 (20) and a cylindrical groove 2 (21) is formed at the bottom of the cylindrical groove 1 (20) through the L-shaped block (19). The cylindrical groove 1 (20) and the cylindrical groove 2 (21) are concentrically arranged.

8. A fire self-rescue breathing apparatus with air purification function according to claim 7, characterized in that, The L-shaped groove (16) is fixedly provided with a fixing rod (22), and the outer surface of the fixing rod (22) slides on the inner wall of the cylindrical groove (21).

9. A fire self-rescue breathing apparatus with air purification function according to claim 8, characterized in that, The outer surface of the fixing rod (22) is fitted with an elastic element (23), the outer wall of the elastic element (23) is directly adapted to the cylindrical groove (20), and the elastic element (23) is limited by the cylindrical groove (20).

10. A fire self-rescue breathing apparatus with air purification function according to claim 9, characterized in that, The L-shaped block (19) has a through hole (24) and an anti-deviation rod (25) is provided in the through hole (24). The anti-deviation rod (25) is fixedly installed in the L-shaped groove (16) and the outer surface of the anti-deviation rod (25) is slidably connected to the through hole (24).

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