An explosion cap for an aircraft engine fire extinguisher

Abstract

The present invention relates to an explosion cap of an aircraft engine fire extinguisher bottle, comprising a shell, an electric plug assembly, an electric squib, a rubber pad, a striker, a clamping device, a screw plug assembly and a pipe joint; the screw plug assembly comprises a screw plug, a gasket and a film; an arc-shaped groove is provided on the striker; the clamping device comprises a steel ball, a spring and a screw abutting the arc-shaped groove; the beneficial effect of the present invention is that when the electric squib explodes, the high-pressure gas generated by the electric squib pushes the rubber pad downward, the rubber pad pushes the striker, the other end of the striker punctures the film, and the fire extinguishing agent in the fire extinguisher bottle enters the pipe joint through a siphon tube to extinguish the fire.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishing devices, in particular to an explosion cap of an aircraft engine fire extinguishing bottle. Background Art

[0002] Most of the valves on aircraft fire extinguisher bottles now use threaded seals. When used for a long time, there is a greater risk of leakage. In addition, the structure is relatively complex and prone to sticking. If the valve is not used for a long time, it is easy to get stuck. When the fire needs to be extinguished, the valve cannot be turned. This problem needs to be solved.

[0003] Among the existing patents, the patent with application number CN201621323433.1, entitled "A fire extinguisher bottle explosion cap status signal simulation device and aircraft fire extinguishing test system", discloses that the fire extinguisher bottle explosion cap status signal simulation device includes a relay (1), a diode (2) and a transistor (3); the base of the transistor (3) is connected to a device power supply, and the emitter of the transistor (3) is grounded; the positive electrode of the diode (2) is connected to the collector of the transistor (3) and the relay (1), and the negative electrode of the diode (2) is connected to the relay drive power supply end of the relay (1); the relay (1) is connected to the fire extinguishing monitoring system. The aircraft fire extinguishing test system includes the fire extinguisher bottle explosion cap status signal simulation device as described above. This patent discloses the working principle of the explosion cap, but does not disclose the internal structure of the explosion cap, which needs to be improved and supplemented;

[0004] Another patent with application number CN201810258053.1, named "A digital display explosive cap tester and its operation method", discloses a test interface module, a constant current source module, a control module, a display module and a power supply module; the test interface module is used to realize measurement channel selection and connection with the resistance to be measured; the constant current source module realizes weak current output through a constant current device, meets the requirements for constant current during four-wire resistance measurement, ensures that the resistance measurement is completed without the explosive cap detonating, and guarantees the test accuracy; the control module is used to realize system status monitoring, system test zeroing, channel data acquisition, resistance conversion, and display output; the display module is controlled by the controller to output data and tester status; the power supply module is used to provide direct current to the microcontroller, LCD display, and constant current source; the patent also publishes the detonation circuit diagram of the explosive cap, but does not disclose the subsequent structure of how to open the fire extinguisher, which needs to be improved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an explosion cap for an aircraft engine fire extinguisher bottle, which can seal the fire extinguishing agent in the fire extinguisher bottle without leakage when there is no fire; and can quickly release the fire extinguishing agent when a fire occurs.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A bursting cap for an aircraft engine fire extinguisher bottle, comprising a hollow outer shell; a siphon assembly fixedly connected to the lower portion of the outer shell; a detonating device disposed on the upper portion of the outer shell; a squib disposed below the detonating device and within the outer shell; a striker disposed within the outer shell and below the squib; a screw plug assembly disposed on the siphon assembly and used to seal the gas within the fire extinguisher bottle; and a pipe joint disposed on one side of the middle portion of the outer shell and used to release fire extinguishing agent into a fire extinguishing pipe.

[0008] A clamping device for clamping the striker is provided on the other side of the middle portion of the shell;

[0009] The striker is slidably connected to the housing;

[0010] The siphon tube assembly includes a threaded joint threadedly connected to the lower portion of the housing and a siphon tube fixedly connected to the threaded joint;

[0011] The threaded joint is fixedly connected to the outlet of the fire extinguisher bottle; the siphon tube extends into the fire extinguisher bottle and communicates with the high-pressure carbon dioxide inside the fire extinguisher bottle;

[0012] Furthermore, the pipe joint is connected to the siphon tube through a screw plug assembly.

[0013] Furthermore, a threaded hole is provided at the lower portion of the shell; the threaded joint is fixedly connected to the threaded hole; the threaded joint is provided with a stepped threaded hole; the screw plug assembly includes a screw plug threadedly connected to the large end of the stepped threaded hole of the threaded joint, an aluminum washer abutting the end face of the screw plug, and a film provided between the washer and the threaded joint; the siphon tube is sealed and connected to the small end of the stepped threaded hole.

[0014] Furthermore, a vent hole is provided in the center of the screw plug; one end of the vent hole is connected to the pipe joint through the shell; and the other end of the vent hole is connected to the siphon tube through a film.

[0015] Furthermore, the shell is provided with a transverse hole communicating with the interior; and a clamping device for clamping the striker is installed between the striker and the transverse hole.

[0016] Furthermore, an arc-shaped groove is provided on the firing pin; the clamping device includes a steel ball abutting the arc-shaped groove, a spring abutting the steel ball, and a screw abutting the spring; the steel ball and the spring can slide in the transverse hole; the screw is threadedly connected to the transverse hole.

[0017] Furthermore, a rubber pad for forming a closed space is provided between the striker and the electric squib; the rubber pad abuts against the striker; a closed space is formed between the rubber pad, the housing, and the electric plug assembly; the electric squib is provided inside the closed space;

[0018] When the electric plug assembly is energized, the electric squib is ignited and explodes. The high-pressure gas generated by the electric squib pushes the rubber pad downward, and the rubber pad pushes one end of the striker. The other end of the striker pierces the film, and the fire extinguishing agent in the fire extinguisher is sucked through the siphon, the central vent hole of the screw plug, the inside of the shell, and the pipe joint to extinguish the fire.

[0019] Furthermore, an inclined surface is provided on one end of the striker that contacts the film.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The fire extinguishing agent can be sealed in the fire extinguishing bottle by the provided screw plug assembly, and the carbon dioxide can be sealed in the gas cylinder by utilizing the close fit between the gasket, film and the contact surface of the screw plug; when the engine catches fire and needs to be extinguished, the high-pressure gas generated by the provided electric squib pushes the rubber pad, and the rubber pad pushes the striker, which disengages from the engagement of the steel ball and moves downward, and the inclined surface of the striker pierces the film, and the carbon dioxide in the fire extinguishing bottle is released to extinguish the fire through the pipe joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic cross-sectional view of the structure of the present invention;

[0023] Figure 2 for Figure 1 A magnified view of point A;

[0024] Figure 3 for Figure 1 Enlarged view of point B;

[0025] Figure 4 for Figure 1 Enlarged view of point C;

[0026] Figure 5 Schematic diagram of the structure of the firing pin.

[0027] In the attached figure:

[0028] 1. Siphon tube, 2. Film, 3. Washer, 4. Screw plug, 5. Sealing gasket, 6. Pipe joint, 7. Gasket, 8. Housing, 9. Electric plug assembly, 10. Electric squib, 11. Steel ball, 12. Spring, 13. Spring gasket, 14. Screw, 15. Rubber pad, 16. Flat gasket, 17. Firing pin, 18. Threaded joint. DETAILED DESCRIPTION

[0029] First, it should be noted that any discussion of any embodiment of the present invention is for illustrative purposes only and is not intended to limit the scope of the present disclosure (including the claims) to these examples. Numerous other variations exist for various aspects of the present invention described above, which, for the sake of clarity, are not provided in detail. Therefore, other embodiments are also within the scope of protection of the corresponding claims.

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Example 1

[0032] See also Figure 1-Figure 5 As shown:

[0033] This embodiment provides a bursting cap for an aircraft engine fire extinguisher bottle, comprising a hollow outer shell 8; a siphon assembly fixedly connected to the lower portion of the outer shell 8; a detonating device disposed on the upper portion of the outer shell 8; a squib 10 disposed below the detonating device and within the outer shell 8; a striker 17 disposed within the outer shell 8 and below the squib 10; a screw plug assembly disposed on the siphon assembly and used to seal the gas within the fire extinguisher bottle; and a pipe joint 6 disposed on one side of the middle portion of the outer shell 8 and used to release the fire extinguishing agent into the fire extinguishing pipe.

[0034] A clamping device for clamping the striker 17 is provided on the other side of the middle portion of the housing 8;

[0035] The striker 17 is slidably connected to the housing 8;

[0036] The siphon assembly includes a threaded joint 18 threadedly connected to the lower portion of the housing 8 and a siphon 1 fixedly connected to the threaded joint 18;

[0037] The siphon pipe 1 and the threaded joint 18 are fixed by welding. After welding, a water leakage test is performed to prevent air leakage.

[0038] The threaded joint 18 is fixedly connected to the outlet of the fire extinguisher bottle; the siphon tube 1 extends into the fire extinguisher bottle and communicates with the high-pressure carbon dioxide inside the fire extinguisher bottle;

[0039] The pipe joint 6 is connected to the siphon pipe 1 through a screw plug assembly.

[0040] like Figure 3 、 4As shown, the lower portion of the housing 8 is provided with a threaded hole; the threaded joint 18 is fixedly connected to the threaded hole; the threaded joint 18 is provided with a stepped threaded hole; the screw plug assembly includes a screw plug 4 threadedly connected to the large end of the stepped threaded hole of the threaded joint 18, an aluminum washer 3 abutting the end surface of the screw plug 4, and a film 2 provided between the washer 3 and the threaded joint 18; the siphon tube 1 is sealed and connected to the small end of the stepped threaded hole; the gas in the fire extinguisher bottle is blocked by the film 2 and cannot be released;

[0041] The gasket 3 of the present application is made of aluminum; when the screw plug 4 is tightened, the aluminum gasket 3 can be plastically deformed, and the gasket 3 fills the small gap between the screw plug 4 and the threaded joint 18, and seals the fire extinguishing agent in the fire extinguishing bottle to prevent leakage.

[0042] In this design, after the film 2 is damaged, the screw plug assembly can be replaced and other parts can continue to be used, thus saving energy and reducing consumption;

[0043] The method for replacing the film 2 is to remove the threaded joint 18 from the housing 8; remove the screw plug 4 from the threaded joint 18, clean the debris of the film 2, place the new film 2 on the new gasket 3, and use the new screw plug 4 to press the film 2 and the gasket 3 into the threaded joint 18.

[0044] A vent hole is provided at the center of the screw plug 4 ; one end of the vent hole is connected to the pipe joint 6 through the shell 8 ; the other end of the vent hole is connected to the siphon tube 1 through the film 2 .

[0045] The housing 8 is provided with a transverse hole communicating with the interior; a clamping device for clamping the striker 17 is installed between the striker 17 and the transverse hole.

[0046] like Figure 5 As shown, the striker 17 is provided with an arc groove 170; the depth of the arc groove 170 is less than the radius of the steel ball 11, so as to prevent the steel ball 11 from contacting the arc groove 170 too deeply, causing the striker 17 and the steel ball 11 to be stuck. When extinguishing the fire, the striker 17 cannot slide, cannot pierce the film 2, and cannot extinguish the fire in time.

[0047] like Figure 3 As shown, the clamping device includes a steel ball 11 abutting against the arc groove 170, a spring 12 abutting against the steel ball 11, and a screw 14 abutting against the spring 12; the steel ball 11 and the spring 12 can slide in the transverse hole; the screw 14 is threadedly connected to the transverse hole.

[0048] like Figure 2 As shown, the striker 17 includes a head and a needle portion, wherein the head is provided with a countersunk hole; the needle portion is used to puncture the film 2;

[0049] A rubber pad 15 is provided between the firing pin 17 and the electric squib 10 to form a closed space. The detailed structure is that a flat gasket 16 is placed in the countersunk hole of the firing pin 17; the rubber pad 15 is placed on the upper part of the flat gasket 16.

[0050] The detonation device is an electric plug assembly 9, which is powered by a 24V power supply;

[0051] A closed space is formed between the rubber pad 15, the housing 8 and the electric plug assembly 9; the electric squib 10 is arranged inside the closed space;

[0052] When the electric plug assembly 9 is energized, the electric squib 10 is ignited and explodes. The high-pressure gas generated by the electric squib 10 pushes the rubber pad 15 downward, and the rubber pad 15 pushes one end of the striker 17. The other end of the striker 17 pierces the film 2. The fire extinguishing agent in the fire extinguisher bottle passes through the siphon 1, the central vent hole of the screw plug 4, the inside of the shell 8, and the pipe joint 6 to extinguish the fire.

[0053] The working process of the present invention,

[0054] When a fire occurs, the power is turned on, the electric plug assembly 9 ignites the electric squib 10, and the electric squib 10 generates high-pressure gas, which pushes the rubber pad 15, the flat gasket 16, and the striker 17. The striker 17 moves downward, pierces the film 2, and forms a gas passage. The carbon dioxide gas is ejected through the siphon 1, the screw plug 4, the shell 8, and the pipe joint 6, and is sent to the location of the fire through the pipeline to achieve the effect of extinguishing the fire.

[0055] Example 2

[0056] This embodiment is basically the same as embodiment 1;

[0057] The difference is that

[0058] like Figure 5 As shown, the end of the striker 17 that contacts the film 2 is provided with an inclined surface.

[0059] By providing the inclined surface, the film 2 and the striker 17 are in point contact instead of surface contact, thereby increasing the pressure between the striker 17 and the film 2 and facilitating rapid puncture of the film 2 .

[0060] The working process and working principle of this embodiment and embodiment 1 are not described in detail.

[0061] Example 3

[0062] This embodiment is basically the same as embodiment 2.

[0063] The difference is that

[0064] A spring washer 13 is provided between the housing 8 and the screw 14 to prevent the screw 14 from loosening.

[0065] The principles of this embodiment are basically the same as those of embodiment 1, so they will not be described in detail.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. At present, the technical solution of this application has adopted the best embodiment of Example 1 and has been pilot-tested, that is, a small-scale test of the product before large-scale mass production. After the pilot-test, a user survey was conducted on a small scale, and the survey results showed high user satisfaction. Preparations are now underway for the formal production and industrialization of the product. The above description is only a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited to this. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications according to the technical solution and its improved concepts shall be covered by the scope of protection of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the above description, and it is intended that all variations that fall within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numerals in the claims should not be construed as limiting the claim to which they relate.

Claims

1. A bursting cap for an aircraft engine fire extinguisher, comprising a hollow outer shell (8); characterized in that: The fire extinguisher further comprises a siphon assembly fixedly connected to the lower portion of the shell (8), a detonating device provided at the upper portion of the shell (8), an electric squib (10) provided below the detonating device and located inside the shell (8), a striker (17) provided inside the shell (8) and located below the electric squib (10), a screw plug assembly provided on the siphon assembly and used for sealing the gas in the fire extinguisher bottle, and a pipe joint (6) provided on one side of the middle portion of the shell (8) and used for releasing the fire extinguishing agent into the fire extinguishing pipe; a clamping device for clamping the striker (17) is provided on the other side of the middle portion of the shell (8); the striker (17) is slidably connected to the shell (8); the siphon assembly comprises a threaded joint (18) threadedly connected to the lower portion of the shell (8) and a siphon (1) fixedly connected to the threaded joint (18); the threaded joint (18) is fixedly connected to the outlet of the fire extinguisher bottle; the siphon (1) extends into the fire extinguisher bottle and is connected to the high-pressure carbon dioxide inside the fire extinguisher bottle; The pipe joint (6) is connected to the siphon pipe (1) via a screw plug assembly; The lower portion of the housing (8) is provided with a threaded hole; the threaded joint (18) is fixedly connected to the threaded hole; the threaded joint (18) is provided with a stepped threaded hole; the screw plug assembly comprises a screw plug (4) threadedly connected to the large end of the stepped threaded hole of the threaded joint (18), an aluminum washer (3) abutting against the end face of the screw plug (4), and a film (2) provided between the washer (3) and the threaded joint (18); the siphon tube (1) is sealed and connected to the small end of the stepped threaded hole; The screw plug (4) is provided with a vent hole at its center; one end of the vent hole is connected to the pipe joint (6) through the housing (8); the other end of the vent hole is connected to the siphon tube (1) through the film (2); The housing (8) is provided with a transverse hole communicating with the interior; a clamping device for clamping the striker (17) is installed between the striker (17) and the transverse hole; The striker (17) is provided with an arc groove (170); the clamping device includes a steel ball (11) abutting against the arc groove (170), a spring (12) abutting against the steel ball (11), and a screw (14) abutting against the spring (12); the steel ball (11) and the spring (12) can slide in the transverse hole; the screw (14) is threadedly connected to the transverse hole.

2. The explosive cap of an aircraft engine fire extinguisher bottle according to claim 1, characterized in that: A rubber pad (15) for forming a closed space is provided between the striker (17) and the electric squib (10); the rubber pad (15) abuts against the striker (17); the detonating device is an electric plug assembly (9); a closed space is formed between the rubber pad (15), the shell (8), and the electric plug assembly (9); the electric squib (10) is provided inside the closed space; when the electric plug assembly (9) is energized, the electric squib (10) is ignited, and the electric squib (10) explodes, and the high-pressure gas generated by the electric squib (10) pushes the rubber pad (15) downward, and the rubber pad (15) pushes one end of the striker (17), and the other end of the striker (17) punctures the film (2), and the fire extinguishing agent in the fire extinguishing bottle passes through the siphon (1), the central vent hole of the screw plug (4), the inside of the shell (8), and the pipe joint (6) to extinguish the fire.

3. The explosion cap of an aircraft engine fire extinguisher bottle according to claim 2, characterized in that: An inclined surface is provided on the end of the striker (17) that contacts the film (2).

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