Igniter

Abstract

The igniter comprises a grain section, the grain section comprises a grain tube shell, the first end of the grain tube shell is open, the second end of the grain tube shell is open, and the grain tube shell is filled with a first flame expanding grain, a delay grain and a second flame expanding grain in sequence; the percussion section comprises a percussion pipe shell, the first end of the percussion pipe shell is sleeved with the second end of the grain pipe shell, an igniter cap seat is assembled in the first end of the percussion pipe shell, an igniter cap is assembled in the igniter cap seat, a firing pin is movably installed in the second end of the percussion pipe shell, the firing pin is sleeved with a pre-compressed firing pin spring, and the pre-compressed firing pin spring is movably installed in the second end of the percussion pipe shell. The first end of the firing pin is used for firing the fire cap, the second end of the firing pin is connected with a fire pulling rope assembling body, the firing pin can be driven to move by pulling the fire pulling rope assembling body, the firing pin spring is further compressed, and the fire pulling rope assembling body can be separated from the firing pin. Ignition does not depend on electric energy, the ignition efficiency is high, and instant ignition can be achieved.

Description

Technical Field

[0001] This application belongs to the technical field of pyrotechnic devices, and particularly relates to a igniter. Background Art

[0002] In related technologies, some common ignition methods for solid rocket motors, such as using electrical energy for ignition. Electrical ignition usually requires external DC power supplies, self-powered devices such as detonators, and built-in batteries to provide electrical energy, which brings inconvenience to the launch of solid rocket motors. For example, the igniter is inside the solid rocket motor and needs to extend wires to connect to an external power supply and be energized for ignition; and due to the complex battlefield environment, the extended wires are prone to problems such as open circuits when connecting to the external power supply, resulting in ignition failure and affecting the launch. Summary of the Utility Model

[0003] This application aims to provide an igniter that does not rely on electrical energy for ignition, has high ignition efficiency, and can instantaneously ignite, and adopts the following technical solutions:

[0004] An igniter, comprising:

[0005] A charge section, the charge section includes a charge casing, the first end of the charge casing is open, the second end of the charge casing is open, and a first flame spreading charge, a delay charge, and a second flame spreading charge are sequentially filled in the charge casing; and

[0006] A firing section, the firing section includes a firing casing, the first end of the firing casing is sleeved inside the second end of the charge casing, a primer seat is assembled inside the first end of the firing casing, a primer is assembled in the primer seat, a firing pin is movably installed inside the second end of the firing casing, a pre-compressed firing pin spring is sleeved on the firing pin, the first end of the firing pin is used to fire the primer, the second end of the firing pin is connected to a lanyard assembly, pulling the lanyard assembly can drive the firing pin to move and further compress the firing pin spring, and the lanyard assembly can be separated from the firing pin.

[0007] Further, the lanyard assembly includes a pull cover, the first end of the pull cover is movably sleeved on the firing pin and the first end of the pull cover is movably sleeved in the firing casing, the second end of the pull cover is connected to a lanyard; a ring groove is provided on the firing pin, and at least one through hole is correspondingly provided on the first end of the pull cover, and a ball is assembled in the through hole and the ring groove.

[0008] Further, a sealing piece is provided between the pull cover and the firing casing.

[0009] Further, the diameters of the first flame spreading charge column and the second flame spreading charge column are 4 ± 0.5 mm, and through holes are provided inside the two; the diameter of the delay charge column is 4 ± 0.5 mm.

[0010] Further, the charge column casing is provided with exhaust holes at the position of the second flame spreading charge column.

[0011] Further, a detachable sleeve is sleeved outside the charge column section.

[0012] Further, a sealing ring is provided between the sleeve and the charge column casing.

[0013] Further, a detachable protective cover is sleeved outside the firing section.

[0014] Advantages of the present application:

[0015] The structure of the present application is simple, easy to use, and highly reliable. It does not require external power supplies, detonators and other equipment, and can achieve immediate installation and ignition. Description of the drawings

[0016] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0017] Figure 2 is a schematic diagram of the structure of the charge column section in an embodiment of the present application;

[0018] Figure 3 is a schematic diagram of the structure of the firing section in an embodiment of the present application;

[0019] Figure 4 is a schematic diagram of the structure of the primer seat and the primer in an embodiment of the present application;

[0020] In the figure: 100 charge column section, 110 charge column casing, 111 exhaust holes, 120 first flame spreading charge column, 130 delay charge column, 140 second flame spreading charge column,

[0021] 200 firing section, 210 firing casing, 211 clamping blocks, 220 firing pin, 221 clamping platform, 222 annular groove, 223 clamping beads, 230 firing pin spring, 240 pull cover, 241 clamping ring, 250 pull cord, 260 primer seat, 270 primer, 280 sealing piece;

[0022] 300 sleeve, 310 sealing ring;

[0023] 400 protective cover. Detailed implementation manners

[0024] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0026] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meanings of "a plurality", "several" are at least two, such as two, three, etc., unless otherwise specifically and clearly defined. In the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] Referring to Figures 1 - 3 , the present application provides an igniter, including:

[0028] A grain section 100, the grain section 100 includes a grain shell 110, the first end of the grain shell 110 is open, the second end of the grain shell 110 is open, and a first flame spread grain 120, a delay grain 130, and a second flame spread grain 140 are sequentially filled in the grain shell 110; and

[0029] Firing section 200, the firing section 200 includes a firing cartridge case 210, the first end of the firing cartridge case 210 is sleeved inside the second end of the grain cartridge case 110, a percussion cap seat 260 is assembled inside the first end of the firing cartridge case 210, a percussion cap 270 is assembled inside the percussion cap seat 260, a firing pin 220 is movably installed inside the second end of the firing cartridge case 210, a pre-compressed firing pin spring 230 is sleeved on the firing pin 220, the first end of the firing pin 220 is used to fire the percussion cap 270, the second end of the firing pin 220 is connected with a lanyard assembly, pulling the lanyard assembly can drive the firing pin 220 to move and further compress the firing pin spring 230, and the lanyard assembly can be separated from the firing pin 220.

[0030] Specifically, referring to Figure 1 , the first end part of the grain cartridge case 110 is in a conical structure for convenient insertion into the solid rocket motor, the diameter of the second end of the grain cartridge case 110 is larger than that of the first end, a connection structure for connecting with the solid rocket motor should be provided on the outer wall of the grain cartridge case 110, the connection structure can be a threaded structure, an elastic clamping part structure or other quick connection structures existing in the prior art, and a corresponding connection structure is also provided inside the solid rocket motor to realize the quick connection between the igniter and the solid rocket motor.

[0031] During use, the grain section 100 of the igniter is inserted into the solid rocket motor, exposing the lanyard assembly, pulling the lanyard assembly makes the firing pin 220 move in the direction away from the percussion cap 270 and further compress the firing pin spring 230 at the same time. When the lanyard assembly is pulled a certain distance, that is, when the ball 223 in the pull cover 240 is pulled to the outside of the firing cartridge case 210, the ball 223 will fall off. After the ball 223 falls off, the lanyard assembly is separated from the firing pin 220. At this time, the firing pin 220 quickly moves towards the percussion cap 270 under the action of the firing pin spring 230 and impacts the percussion cap 270, the percussion cap 270 ignites and ignites the second flame spreading grain 140, the second flame spreading grain 140 ignites the delay grain 130, after a delay time of 5.5 - 9 seconds, the delay grain 130 ignites the first flame spreading grain 120 to realize the firing of the igniter. The igniter of the present application has a simple structure and high reliability: the reliability can reach 0.98 (confidence level 0.8). In addition, the igniter of the present application is convenient to use and does not require other equipment such as external power supplies and detonators, and can be fired immediately after installation. Referring to Figure 3, It can be understood that the lanyard assembly includes a pull cover 240. The first end of the pull cover 240 is movably sleeved on the firing pin 220 and the first end of the pull cover 240 is movably sleeved in the firing tube housing 210. A lanyard 250 is connected to the second end of the pull cover 240; a ring groove 222 is provided on the firing pin 220, and at least one perforation is correspondingly provided on the first end of the pull cover 240, and a detent ball 223 is assembled in the perforation and the ring groove 222.

[0032] Specifically, the first end of the firing pin 220 is in a sharp cone structure and can pierce through the primer 270. A retaining platform 221 is also provided at the first end of the firing pin 220. A retaining block 211 is provided inside the firing tube housing 210. The firing pin spring 230 is sleeved on the firing pin 220 and is stuck between the retaining platform 221 and the retaining block 211. When the firing pin 220 moves in a direction away from the primer 270, the firing pin spring 230 can be compressed. A snap ring 241 is provided on the pull cover 240. When the detent ball 223 is assembled in the ring groove 222 and the perforation, the pre-compression of the firing pin spring 230 can be realized, preventing the pull cover 240 and the firing pin 220 from separating due to reasons such as shaking. During use, the lanyard 250 is pulled, and the firing pin 220 is driven to move through the pull cover 240; the firing pin spring 230 is further compressed; when the pull cover 240 moves to the point where the perforation disengages from the firing tube housing 210, the detent ball 223 can disengage from the ring groove 222 and the perforation, so that the pull cover 240 is separated from the firing pin 220, and further the firing pin 220 can strike the primer 270 when the firing pin spring 230 releases elastic potential energy.

[0033] It can be understood that the connection between the pull cover 240 and the firing pin 220 can also adopt other connection methods of existing technologies. For example, a retaining pin can be provided on the firing pin 220, the retaining pin is inserted into the perforation, and a break can be provided on the retaining pin. When the lanyard 250 is pulled with a certain force, the retaining pin can be broken to separate the pull cover 240 from the firing pin 220.

[0034] Refer to Figure 3 , It can be understood that a sealing piece 280 is provided between the pull cover 240 and the firing tube housing 210.

[0035] Specifically, a snap ring 241 is provided on the pull cover 240, and the sealing piece 280 is provided between the snap ring 241 and the firing tube housing 210. By providing the sealing piece 280, the sealing performance inside the pull cover 240 and the firing tube housing 210 is ensured, preventing moisture from entering and causing the propellant column to fail.

[0036] It can be understood that the diameters of the first flame-expanding charge 120 and the second flame-expanding charge 140 are 4 ± 0.5 mm, and through holes are provided inside both of them; the diameter of the delay charge 130 is 4 ± 0.5 mm. Specifically, the main components of the first flame-expanding charge 120 and the second flame-expanding charge 140 are black powder, and a large amount of gas will be generated after combustion, resulting in an increase in pressure. By providing through holes, the gas can be quickly discharged, improving the delay stability; the main component of the delay charge 130 is black powder or pyrotechnic composition.

[0037] Referring to Figure 1 and 2 , it can be understood that the cartridge case 110 is provided with an exhaust hole 111 at the position of the second flame-expanding charge 140.

[0038] Specifically, by adding the exhaust hole 111 to the cartridge case 110, the influence of the gas pressure on the delay time of the delay charge 130 is reduced.

[0039] Referring to Figure 1 , it can be connected that a detachable sleeve 300 is sleeved outside the cartridge section 100. Specifically, by providing the detachable sleeve 300, it is used to protect the charges in the cartridge case 110 from being affected by moisture and becoming ineffective. Among them, the sleeve 300 and the cartridge case 110 can be connected by threaded connection, snap connection or other quick-detachable connection methods in the prior art.

[0040] Referring to Figure 1 , it can be understood that a sealing ring 310 is provided between the sleeve 300 and the cartridge case 110.

[0041] Specifically, by providing the sealing ring 310, the sealing performance between the sleeve 300 and the cartridge case 110 is further improved.

[0042] Referring to Figure 1 , it can be understood that a detachable protective cover 400 is sleeved outside the firing section 200. Specifically, by providing the protective cover 400, it is prevented that the pull-cord assembly is accidentally pulled to cause the igniter to fire, and at the same time, the sealing performance is improved. Among them, the protective cover 400 and the firing cartridge case 210 can be connected by threaded connection, snap connection or other quick-detachable connection methods in the prior art.

[0043] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the principle of the present application shall be included in the protection scope of the present application.

Claims

1. An igniter, characterized in that, Comprising: A propellant charge section, the propellant charge section includes a propellant charge casing, the first end of the propellant charge casing is open, the second end of the propellant charge casing is open, and a first flash-extending propellant charge, a delay propellant charge and a second flash-extending propellant charge are successively filled in the propellant charge casing; and A percussion section, the percussion section includes a percussion casing, the first end of the percussion casing is sleeved inside the second end of the propellant charge casing, a primer seat is assembled inside the first end of the percussion casing, a primer is installed in the primer seat, a firing pin is movably installed inside the second end of the percussion casing, a pre-compressed firing pin spring is sleeved on the firing pin, the first end of the firing pin is used to percuss the primer, the second end of the firing pin is connected with a lanyard assembly, pulling the lanyard assembly can drive the firing pin to move and further compress the firing pin spring, and the lanyard assembly can be separated from the firing pin.

2. The igniter according to claim 1, characterized in that, The lanyard assembly includes a pull cover, the first end of the pull cover is movably sleeved on the firing pin and the first end of the pull cover is movably sleeved in the percussion casing, the second end of the pull cover is connected with a lanyard; a ring groove is arranged on the firing pin, at least one through hole is correspondingly arranged on the first end of the pull cover, and a detent ball is assembled in the through hole and the ring groove.

3. An igniter according to claim 2, characterized in that, A sealing piece is arranged between the pull cover and the percussion casing.

4. An igniter according to any one of claims 1 to 3, characterized in that, The diameters of the first flash-extending propellant charge and the second flash-extending propellant charge are 4±0.5 mm, and through holes are arranged inside the two; the diameter of the delay propellant charge is 4±0.5 mm.

5. An igniter according to any one of claims 1-3, characterized in that The propellant charge casing is provided with exhaust holes at the position of the second flash-extending propellant charge.

6. An igniter according to any one of claims 1 to 3, characterized in that, A detachable sleeve is sleeved outside the propellant charge section.

7. An igniter according to any one of claims 1-3, characterized in that, A sealing ring is arranged between the sleeve and the propellant charge casing.

8. An igniter according to any one of claims 1 to 3, characterized in that, A detachable protective cover is sleeved outside the percussion section.

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