Rubber non-stored pressure type dry powder throwing fire extinguisher

Abstract

The invention discloses a rubber non-stored-pressure type dry powder throwing fire extinguisher which comprises an integrally-formed rubber spherical shell made of fire-resistant rubber, and a circle of corrugated weak fracture part with the depth of about 0.5 mm is machined in the middle section position of the rubber spherical shell in advance through a mold. The integrally-formed fire-resistant rubber spherical shell is adopted, and the preset corrugated weak fracture part is combined, so that the defect that an existing hard barrel is prone to being damaged due to collision and uncontrollable in blasting is effectively overcome, the flexible rubber shell has excellent impact resistance and buffering performance during throwing and collision, and the service life of the fire-resistant rubber spherical shell is prolonged. The risk that the shell is damaged and the fire extinguishing agent leaks due to physical collision when the shell is not triggered is greatly reduced, meanwhile, the preset weak part enables the shell to be regularly and directionally burst when the internal pressure reaches a preset value, the uniformity and controllability of the blasting strength and direction are ensured, and the safety performance of the shell is improved. The superfine dry powder extinguishing agent can be instantly dispersed to the whole fire scene space without dead angles, and the reliability and efficiency of extinguishing fire are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of high-pressure hydrogen-oxygen chamber technology, and more specifically, to a rubber non-pressurized throwable dry powder fire extinguisher. Background Technology

[0002] Throwable fire extinguishers have become an important tool for initial fire suppression in enclosed spaces due to their ease of operation and ability to extinguish fires without requiring personnel to approach the fire source. Existing throwable fire extinguishers are mainly divided into two categories: one is the early product that uses fragile materials such as EPS foam as the shell. These products are prone to accidental damage due to impact during throwing, leading to leakage of extinguishing agent, and the internal gunpowder triggering device has the risk of incomplete extinguishing agent release; the other is the improved pressurized fire extinguisher, such as the scheme disclosed in Chinese Patent No. CN219440506U, which adopts a split rigid cylinder and solves the cylinder recovery and sealing problems through connecting ropes and complex sealing rings.

[0003] However, the prior art represented by the publicly disclosed document "CN219440506U" still has obvious defects: First, if its rigid cylinder (such as metal) is not triggered in time after being thrown, it is prone to deformation or damage when it collides with a hard surface, affecting normal function; second, the two-half cylinder structure relies on I-shaped rubber sealing rings for sealing, the assembly process is complicated, and there is a risk of sealing failure in long-term storage or extreme environments; finally, its explosion depends on the mechanical strength of the joint between the two halves of the cylinder, and the force and direction of the explosion are poorly controllable, which may lead to uneven dispersion of extinguishing agent and affect fire extinguishing efficiency. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a rubber non-pressurized throwable dry powder fire extinguisher. By employing a one-piece molded fire-resistant rubber spherical shell, combined with its pre-designed corrugated weak fracture section, it effectively overcomes the shortcomings of existing rigid cylinders that are easily damaged by impact and have uncontrollable bursting. Specifically, the flexible rubber shell has excellent impact resistance and cushioning performance upon impact, greatly reducing the risk of shell damage and extinguishing agent leakage due to physical collisions when not triggered. At the same time, the pre-designed weak section allows the shell to burst in a regular and directional manner when the internal pressure reaches a predetermined value, ensuring the uniformity and controllability of the bursting force and direction. This allows the ultrafine dry powder extinguishing agent to be instantly, uniformly, and without dead zones. The gas diffuses throughout the entire fire area, significantly improving the reliability and efficiency of fire extinguishing. Simultaneously, this design ensures that the high-pressure gas remains sealed within the storage cylinder for extended periods, isolated from the extinguishing agent, resulting in high storage safety. More importantly, compared to the complex structure in the prior art that relies on an "I-shaped rubber sealing ring" to seal the two halves of the cylinder, the rubber spherical shell of this invention has no seams. The valve body and the spherical shell are directly pressed together using tooling, forming a essentially fully sealed structure. This completely eliminates the risk of seal failure due to sealing ring aging, improper assembly, or extreme environments, guaranteeing the absolute sealing reliability of the fire extinguisher during long-term storage and in harsh environments. Finally, this design addresses the problems of dry powder caking, incomplete discharge, and insufficient trigger safety in existing technologies. This mechanical triggering structure is simple and reliable, avoiding the risk of electronic component failure. During operation, high-pressure gas is ejected through multiple pressure relief holes, forming a "delayed charging" stage. This provides valuable time for personnel to evacuate after throwing the extinguishing agent. On the other hand, the high-speed airflow can fully agitate the dry powder extinguishing agent inside the shell, effectively preventing it from caking and ensuring that all extinguishing agents participate in fire extinguishing in the best fluffy state. In addition, the normally closed valve composed of a spring and a rigid sealing block, as well as the external safety clip and protective cap, together constitute a multi-layered safety mechanism, effectively preventing accidental triggering and comprehensively improving the operational safety of the product, thereby solving the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A rubber non-pressurized throwable dry powder fire extinguisher, the core of which includes: an integrally molded rubber spherical shell made of fire-resistant rubber, and a pre-set corrugated weak fracture section in the middle section of the spherical shell; An ultrafine dry powder fire extinguishing agent is filled into the closed cavity formed by the rubber spherical shell; A gas storage cylinder is placed inside the rubber spherical shell, and its mouth is sealed by a working diaphragm, forming a non-pressurized structure. The valve body has its lower end pressed into the rubber spherical shell by tooling, and its upper end has an opening; the side wall of the valve body has multiple pressure relief holes; A triggering mechanism, located within the valve body, is used to puncture the working diaphragm to release the high-pressure gas in the gas storage cylinder.

[0006] Furthermore, the triggering mechanism includes a push rod, a spring, and a hard sealing block. The push rod is slidably disposed within the valve body and valve cover, and its lower end is used to pierce the working diaphragm. The hard sealing block is fixed to the outer wall of the push rod and is pre-tightened by the spring, so that the lower end of the push rod is away from the working diaphragm in the non-working state. The bottom of the valve cover is provided with a conical groove that matches the hard sealing block. Under the action of the spring, the hard sealing block and the conical groove fit tightly together to form a seal.

[0007] Furthermore, a handle is connected to the top of the top rod, a releasable safety catch is provided between the valve cover and the handle, and a protective cap covering the handle is threadedly connected to the upper port of the valve body.

[0008] Furthermore, a working pad is placed on the side of the working diaphragm near the top rod, and the mouth of the gas storage bottle is connected to the inner side of the lower end of the valve body by a nut, thereby pressing and fixing the working diaphragm and the working pad.

[0009] Furthermore, a seal is provided on the outside of the pressure relief hole on the side wall of the valve body to prevent dry powder extinguishing agent from entering the valve body.

[0010] Furthermore, the sealing element is a rubber sleeve or a sealing plug with a tapered end near the inner side.

[0011] Furthermore, the depth of the corrugated weak fracture portion is 0.5 mm.

[0012] Furthermore, the middle section of the rubber spherical shell is cylindrical.

[0013] Furthermore, the ultrafine dry powder extinguishing agent is ABC ultrafine dry powder extinguishing agent, with 90% of its average particle size being less than 20 micrometers.

[0014] The technical effects and advantages of this invention are as follows: 1. This invention effectively overcomes the shortcomings of existing rigid cylinders, which are prone to damage from impacts and uncontrollable bursts, by using an integrally molded fire-resistant rubber spherical shell combined with its pre-designed corrugated weak fracture section. Specifically, the flexible rubber shell has excellent impact resistance and cushioning performance when thrown, greatly reducing the risk of shell damage and extinguishing agent leakage due to physical collisions when not triggered. At the same time, the pre-designed weak section allows the shell to burst in a regular and directional manner when the internal pressure reaches a predetermined value, ensuring the uniformity and controllability of the burst force and direction. This allows the ultrafine dry powder extinguishing agent to be dispersed instantly, uniformly, and without dead angles throughout the entire fire space, significantly improving the reliability and efficiency of fire extinguishing.

[0015] 2. This invention integrates a non-pressurized independent gas cylinder into a rubber spherical shell using a one-piece molding process, fundamentally solving the complex sealing and leakage problems inherent in split structures. Furthermore, this design ensures that high-pressure gas remains sealed within the gas cylinder for extended periods, isolated from the extinguishing agent, resulting in high storage safety. More importantly, compared to the complex structure in the prior art that relies on an "I-shaped rubber sealing ring" to seal the two halves of the cylinder, the rubber spherical shell of this invention has no seams. The valve body and the shell are directly pressed together using tooling, forming an essentially fully sealed structure. This completely eliminates the risk of sealing failure due to sealing ring aging, improper assembly, or extreme environments, ensuring the absolute sealing reliability of the fire extinguisher during long-term storage and in harsh environments.

[0016] 3. This invention solves the problems of dry powder caking, incomplete discharge, and insufficient triggering safety in existing technologies by designing a triggering and delayed charging mechanism consisting of a push rod, spring, hard sealing block, and valve body pressure relief hole. This mechanical triggering structure is simple and reliable, avoiding the risk of electronic component failure. During operation, high-pressure gas is ejected through multiple pressure relief holes, forming a "delayed charging" stage. This provides valuable time for personnel to evacuate after throwing the extinguishing agent. On the other hand, the high-speed airflow can fully agitate the dry powder extinguishing agent inside the shell, effectively preventing caking and ensuring that all extinguishing agents participate in extinguishing the fire in the best fluffy state. In addition, the normally closed valve consisting of the spring and hard sealing block, as well as the external safety clip and protective cap, together constitute a multiple safety mechanism, effectively preventing accidental triggering and comprehensively improving the operational safety of the product. Attached Figure Description

[0017] Figure 1 This is a schematic cross-sectional view of the main body of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of the middle section; Figure 3 This is a schematic diagram of the cross-sectional structure of the valve body of the present invention; Figure 4 This is a schematic diagram of the insurance card structure of the present invention; Figure 5 This is a schematic diagram of the overall structure of the present invention.

[0018] The attached diagram is labeled as follows: 1-protective cap; 2-handle; 3-safety clip; 4-valve cover; 5-spring; 6-top rod; 7-rubber sleeve; 8-valve body; 9-nut; 10-working gasket; 11-working diaphragm; 12-gas cylinder; 13-rubber spherical shell; 14-ultra-fine dry powder extinguishing agent; 15-pressure relief hole; 16-sealing plug; 17-conical groove; 18-hard sealing block; 19-corrugated weak fracture section. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] As attached Figures 1 to 5 The illustrated fire extinguisher is a rubber-based non-pressurized throwable dry powder fire extinguisher. Its core design features a highly reliable structure and a controllable extinguishing agent release mechanism. It mainly consists of four parts: the outer shell system, the extinguishing agent, the power source, and the trigger control system.

[0021] 1. Outer Shell System: The outer shell system includes an integrally molded rubber spherical shell 13 made of fire-resistant rubber. In the middle section of the rubber spherical shell 13, a corrugated weak fracture section 19 with a depth of about 0.5 mm is pre-processed by a mold. This structure is the key to whether the fire extinguisher can achieve controlled explosion. The middle part of the rubber spherical shell 13 is preferably cylindrical, which allows the fire extinguisher to continue rolling in a predetermined direction after being thrown and landing, making it easier to reach the core area of ​​the fire source.

[0022] II. Extinguishing Agent: The closed cavity formed inside the rubber spherical shell 13 is filled with an ultrafine dry powder extinguishing agent 14. In this embodiment, an ABC type ultrafine dry powder extinguishing agent is preferably used, with 90% of its particles having an average particle size of less than 20 micrometers. This extinguishing agent has an extremely high specific surface area and dispersibility, and its extinguishing efficiency far exceeds that of ordinary dry powder, making it especially suitable for extinguishing concealed fires or space fires.

[0023] III. Power Source: The power source is an independent gas cylinder 12, which is also placed inside the cavity of the rubber spherical shell 13. The gas cylinder 12 stores high-pressure carbon dioxide as a pressure source. Its mouth is sealed by a working diaphragm 11, which keeps the fire extinguisher in a "non-pressurized" state under normal conditions. That is, the high-pressure gas is confined inside the gas cylinder 12 and isolated from the extinguishing agent, thus ensuring the safety and reliability of long-term storage.

[0024] IV. Trigger Control System: This system is the "brain" that activates the fire extinguisher, and its core component is the valve body 8 and its internal mechanism.

[0025] The lower end of the valve body 8 is formed by pressing the rubber spherical shell 13 with a tool and firmly integrated into one piece. At least four pressure relief holes 15 are evenly opened on the side wall of the valve body 8. The exterior of these pressure relief holes 15 is sealed by a sealing element to prevent the dry powder extinguishing agent 14 from entering the interior of the valve body 8. The sealing element can be a rubber sleeve 7 that is fitted outside the valve body 8, or a sealing plug 16 with a conical end that is inserted into the hole. The conical design makes it easy to be opened under internal pressure.

[0026] The triggering mechanism is located inside the valve body 8 and is used to puncture the working diaphragm 11. It specifically includes: The push rod 6 is slidably disposed within the valve body 8 and the valve cover 4, with its lower end being sharp and aligned with the working diaphragm 11.

[0027] The rigid sealing block 18 is fixed to the outer wall of the push rod 6, and the spring 5 acts between the rigid sealing block 18 and the inner wall of the valve body 8 to provide an upward preload force, so that the lower end of the push rod 6 is away from the working diaphragm 11 when it is not in operation, thus avoiding accidental triggering.

[0028] A conical groove 17 is provided at the bottom of the valve cover 4, which matches the shape of the hard sealing block 18. Under the action of the spring 5, the hard sealing block 18 and the conical groove 17 fit tightly together to form a reliable sealing pair. It is worth noting that when the fire extinguisher is activated, the high-pressure gas in the gas cylinder 12 will push the hard sealing block 18 upward, making it fit more tightly with the conical groove 17. This can effectively maintain the airtightness of the upper part of the valve body 8 after triggering, ensuring that the pressure is concentrated on the rubber spherical shell 13.

[0029] V. Insurance and Operation Mechanism: To ensure absolute safety during transportation and storage, this invention incorporates multiple layers of insurance.

[0030] The top of the push rod 6 extends out of the valve cover 4 and is connected to the handle 2; Between the valve cover 4 and the handle 2, there is a rotatable or removable safety catch 3. This safety catch 3 can restrict the downward movement of the push rod 6 and is the core component to prevent misoperation.

[0031] On the outermost side, a protective cap 1 is connected to the upper port of the valve body 8 by threads, completely covering the handle 2 and the safety card 3, providing physical protection.

[0032] Above the working diaphragm 11, near the push rod 6, there is a working pad 10. It can provide additional protection for the working diaphragm 11 and also increase the feel when triggering. The mouth of the gas cylinder 12 is connected to the inner thread of the lower end of the valve body 8 through a nut 9. When the nut 9 is tightened, it also presses and fixes the working diaphragm 11 and the working pad 10.

[0033] The working principle of this invention is as follows: When a fire is discovered, the operator first unscrews the protective cap 1, then releases the safety card 3 by pulling it out or rotating it to the disengaged position. Subsequently, the operator quickly strikes the handle 2, which drives the top rod 6 and the hard sealing block 18 to move downward against the elastic force of the spring 5. The bottom end of the top rod 6 pierces the working pad 10 and the working diaphragm 11 in sequence. After the working diaphragm 11 is pierced, the high-pressure carbon dioxide gas in the gas cylinder 12 is released instantly. The gas is sprayed at high speed into the closed cavity of the rubber spherical shell 13 through multiple pressure relief holes 15 on the side wall of the valve body 8. This process is a carefully designed "delayed inflation" stage: the gas does not directly cause the shell to explode, but first diffuses throughout the cavity, fully agitating and mixing the ultrafine dry powder extinguishing agent 14 to prevent it from caking, while buying valuable time for the operator to throw and leave the danger zone. As gas continues to flow in, the internal pressure of the rubber spherical shell 13 continues to rise. When the pressure reaches the preset critical value, the shell bursts regularly from the weakest corrugated fracture part 19. At the moment of bursting, the ultrafine dry powder extinguishing agent 14, which has been fully stirred and mixed, forms a dense powder mist under high pressure, which instantly diffuses into the entire protected space and effectively extinguishes the fire.

[0034] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-pressurized rubber-fired dry powder extinguisher, comprising an integrally molded rubber spherical shell (13) made of fire-resistant rubber, characterized in that: It also includes a pre-set corrugated weak fracture section (19) in the middle section of the spherical shell. Ultrafine dry powder fire extinguishing agent (14) is filled into the closed cavity formed by the rubber spherical shell (13); The gas storage bottle (12) is placed inside the rubber spherical shell (13), and its mouth is sealed by a working diaphragm (11), forming a non-pressurized structure; The valve body (8) is pressed together with the rubber spherical shell (13) at its lower end by tooling, and has an opening at its upper end; the side wall of the valve body (8) is provided with multiple pressure relief holes (15). A triggering mechanism, located inside the valve body (8), is used to puncture the working diaphragm (11) to release the high-pressure gas in the gas storage bottle (12).

2. The rubber non-pressurized throwable dry powder fire extinguisher according to claim 1, characterized in that: The triggering mechanism includes a push rod (6), a spring (5), and a hard sealing block (18). The push rod (6) is slidably disposed in the valve body (8) and the valve cover (4), and its lower end is used to puncture the working diaphragm (11). The hard sealing block (18) is fixed to the outer wall of the push rod (6) and pre-tightened by the spring (5) so that the lower end of the push rod (6) is away from the working diaphragm (11) in the non-working state. The bottom of the valve cover (4) is provided with a conical groove (17) that matches the hard sealing block (18). Under the action of the spring (5), the hard sealing block (18) and the conical groove (17) fit tightly together to form a seal.

3. A rubber non-pressurized throwable dry powder fire extinguisher according to claim 2, characterized in that: The top of the top rod (6) is connected to a handle (2), and a releasable safety catch (3) is provided between the valve cover (4) and the handle (2). The upper port of the valve body (8) is also threaded with a protective cap (1) covering the handle (2).

4. A rubber non-pressurized throwable dry powder fire extinguisher according to claim 2, characterized in that: The working diaphragm (11) is padded with a working pad (10) on the side near the top rod (6). The mouth of the gas storage bottle (12) is connected to the inner side of the lower end of the valve body (8) by a nut (9), and the working diaphragm (11) and the working pad (10) are pressed and fixed.

5. A rubber non-pressurized throwable dry powder fire extinguisher according to claim 1, characterized in that: The pressure relief hole (15) on the side wall of the valve body (8) is provided with a seal to prevent dry powder extinguishing agent (14) from entering the interior of the valve body (8).

6. A rubber non-pressurized throwable dry powder fire extinguisher according to claim 5, characterized in that: The sealing element is a rubber sleeve (7) or a sealing plug (16) with a conical shape at one end near the inner side.

7. A rubber non-pressurized throwable dry powder fire extinguisher according to claim 1, characterized in that: The depth of the corrugated weak fracture section (19) is 0.5 mm.

8. A rubber non-pressurized throwable dry powder fire extinguisher according to claim 1, characterized in that: The middle section of the rubber spherical shell (13) is cylindrical.

9. A rubber non-pressurized throwable dry powder fire extinguisher according to claim 1, characterized in that: The ultrafine dry powder extinguishing agent (14) is ABC ultrafine dry powder extinguishing agent, and 90% of its average particle size is less than 20 micrometers.

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