Igniter with double ignition parts

Abstract

The utility model discloses an igniter with double ignition parts, which comprises two ignition channels which are different in type, mutually independent and capable of inputting ignition current at intervals, one ignition channel comprises a single bridge wire electrode plug type ignition part, and the other ignition channel comprises a single electric ignition head type ignition part. According to the ignition device, the advantages of the igniter wire and the ignition head are combined, two independent ignition channels are adopted, one ignition channel adopts a single igniter wire electrode plug, the other ignition channel adopts a single ignition head, the two ignition channels are physically isolated, two ignition circuits are adopted, and ignition current is input twice in sequence; and the two independent ignition channels act in sequence, so that the ignition reliability of the igniter is greatly improved.

Description

Technical Field

[0001] The utility model relates to an ignition tool / ignition device for a solid rocket engine, which is used to improve the safety and reliability of the ignition tool / ignition device for a solid rocket engine and belongs to the technical field of aerospace power. Background Art

[0002] The ignition device of a solid rocket engine is generally composed of an electric ignition tube, a shell, a cartridge assembly, a powder column, etc. Its working principle is: an external power supply inputs an activation current through an electrical connector, and the current passes through the bridge wire in the electric ignition tube, which generates Joule heat. When the temperature reaches the activation temperature of the black powder, the black powder in the electric ignition tube undergoes a chemical reaction and burns. The hot gas generated breaks through the sealing film of the electric ignition tube, and the hot gas ignites the powder column, which burns and generates flames accompanied by hot particles. The flames and hot particles are ejected from the nozzle, igniting the main charge of the composite solid propellant in the engine, completing the ignition function.

[0003] Traditional ignition elements include electrode plug type (bridge wire) and electric ignition head type. In the electrode plug type ignition element, the redundant structure is realized by double bridge four pins (see Figure 1 , including a foot line 11, a cover 12, a housing 13, a bridge wire 14, black powder 15 and a sealing plug 16); in the electric ignition head type ignition element, the redundant structure is achieved by using two single-bridge ignition tubes (see Figure 2 , including a foot line 21, a cover 22, a shell 23, an electric ignition head 24, black powder 25 and a sealing plug 26). However, in actual use, it is found that these two traditional redundant structures cannot improve the ignition reliability of the ignition tool / ignition device, and belong to "false redundancy". This is because the traditional redundant design is a double bridge wire parallel connection or a double ignition head parallel connection. A fault anywhere before the parallel connection will cause the redundant design at the parallel connection to fail. Summary of the invention

[0004] The utility model aims to provide an ignition device with double ignition parts, which can improve the ignition reliability at a relatively low cost and realize a true ignition redundancy design.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A double-ignition-piece ignition tool comprises two ignition channels of different types, which are independent of each other and have interval input ignition currents. One ignition channel comprises a single-bridge-wire electrode plug-type ignition component, and the other ignition channel comprises a single electric ignition head-type ignition component.

[0007] Furthermore, the double-fired-piece ignition device also includes a shell, in which two mutually isolated and unconnected channels are arranged, the first end of the channel passes through the end surface of the shell, the second end of the channel contacts the same sensitive medicine, and the other end of the sensitive medicine contacts the main charge.

[0008] Furthermore, the dual-ignition-piece ignition tool further comprises a filter, and two filters are respectively arranged in two channels.

[0009] Furthermore, the sensitive drug comprises a first sensitive drug region and a second sensitive drug region of different components, and the first sensitive drug region and the second sensitive drug region respectively correspond to the second end of a channel.

[0010] Furthermore, the single bridge wire electrode plug type ignition component and the electric ignition head type ignition component are connected to the same electrical connector.

[0011] Furthermore, the surface of the shell is provided with external threads.

[0012] Compared with the prior art, the dual-ignition ignition tool of the utility model combines the advantages of both the bridge wire and the ignition head. When designing the ignition cartridge, two independent ignition channels are adopted, one of which adopts a single bridge wire electrode plug, and the other adopts a single ignition head. The two ignition channels are physically isolated and adopt a two-way ignition circuit. When the ignition current is input twice in sequence with an interval of 200ms, the two independent ignition channels act in sequence, which can greatly improve the ignition reliability of the ignition tool / ignition device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a simplified diagram of the structure of the electrode plug (bridge wire) ignition component;

[0014] Figure 2 It is a simplified diagram of the structure of the electric ignition head type ignition component;

[0015] Figure 3 It is a schematic diagram of the structure of a double-ignition-piece ignition device;

[0016] In the figure: 1 - electrical connector; 2 - housing; 3 - filter; 41 - electrode plug type ignition element; 42 - electric ignition head type ignition element; 5 - sensitive charge; 6 - main charge. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0018] like Figure 3As shown, in this embodiment, a dual-ignition-piece ignition device is provided, which is mainly composed of an electrical connector 1, a housing 2, a filter 3, an electrode plug-type ignition piece 41 (bridge wire type), an electric ignition head-type ignition piece 42, a sensitive medicine 5 and a main charge 6. The housing 2 is provided with an external thread on the outside for easy installation. Two mutually isolated and unconnected channels are provided in the housing 2, the first end of the channel passes through the end face of the housing 2, the second end of the channel contacts the same sensitive medicine 5, and the other end of the sensitive medicine 5 contacts the main charge 6. Two filters 3 are respectively arranged in the two channels, and the foot wires of the electrode plug-type ignition piece 41 and the electric ignition head-type ignition piece 42 are connected to the electrical connector 1 through the filter 3. During ignition, when the ignition current is input twice in sequence with an interval of 200ms, the two independent ignition channels act in sequence, thereby improving the ignition reliability.

[0019] Two independent ignition channels are designed in the housing 2 of the double ignition element. The failure of one channel does not affect the other channel. No matter from the perspective of circuit design or fire transmission design, they will not affect each other. In particular, the sensitive medicine 5 at the end of the two channels can use the same sensitive medicine or different sensitive medicines. The two channels in the housing 2 are physically isolated. Therefore, the redundant design of the utility model is strictly divided into two channels starting from the external ignition current input, and the reliability of ignition is ensured by cooperating with different types of ignition elements.

[0020] The above is the main concept of the present invention, and all ignition tools / ignition devices designed based on this concept fall within the protection scope of the present invention.

Claims

1. A double ignition element ignition device, characterized in that: It comprises two ignition channels of different types, which are independent of each other and have an interval input ignition current, wherein one ignition channel comprises a single bridge wire electrode plug type ignition component (41), and the other ignition channel comprises a single electric ignition head type ignition component (42).

2. A dual ignition element lighter according to claim 1, characterized in that: It also comprises a shell (2), wherein two mutually isolated and unconnected channels are arranged in the shell (2), a first end of the channel passes through the end surface of the shell (2), a second end of the channel contacts the same sensitive drug (5), and the other end of the sensitive drug (5) contacts the main charge (6).

3. A dual ignition element lighter according to claim 2, characterized in that: It also includes filters (3), wherein two filters (3) are respectively arranged in two channels.

4. The dual-ignition-piece ignition device according to claim 2, characterized in that: The sensitive drug (5) comprises a first sensitive drug region and a second sensitive drug region having different components, and the first sensitive drug region and the second sensitive drug region each correspond to a second end of a channel.

5. The dual-ignition-piece ignition device according to claim 1, characterized in that: The single bridge wire electrode plug type ignition component (41) and the electric ignition head type ignition component (42) are connected to the same electrical connector (1).

6. The dual-ignition-piece ignition device according to claim 2, characterized in that: The surface of the housing (2) is provided with external threads.

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