A transfer charge cartridge for an ignition device

Abstract

The application discloses a kind of fire transmission charge box for ignition device, comprising: fire transmission charge box box body, gasket, cover piece, ignition powder;The bottom of the fire transmission charge box box body is provided with fire transmission hole, and inside is provided with step surface;The gasket is located between ignition powder and fire transmission hole, covers entire fire transmission hole;The cover piece is bowl structure, and the ignition powder is reversed and buckled in the fire transmission charge box box body, the height of cover piece is less than the step surface in the fire transmission charge box box body, and the cover piece and the fire transmission charge box box body are bonded and fixed.The fire transmission charge box provided in the application is related to the firing reliability and ignition delay time consistency of ignition device, so as to affect whether ignition device can work normally and simultaneously, with the characteristics of simple structure, fast and reliable fire transmission, strong environmental adaptability, and is an important component of ignition device.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of solid rocket engine ignition, and particularly relates to a transfer charge box for an ignition device. BACKGROUND

[0002] The ignition device is an important component of the solid rocket engine, and in the separation between rocket stages, multiple ignition devices need to work synchronously, and the ignition delay time consistency of the ignition device affects the separation reliability. The transfer charge box is an important link for reliable and rapid ignition of the ignition device, and at present, the structure of the transfer charge box is relatively complex, and the transfer speed is slow, so that the ignition delay time of the ignition device is long, and the ignition consistency is poor. SUMMARY

[0003] The technical problem solved by the application is that in the face of the traditional transfer charge box, in view of the problems of complex structure, slow transfer speed, long ignition delay time, poor ignition consistency and the like, a new type of transfer charge box for an ignition device is developed, and then reliable and rapid transfer from the ignition element to the ignition main charge of the ignition device is accurately realized, and the design is reasonable, the structure is simple, and the environmental adaptability is strong.

[0004] In order to solve the above technical problems, the application discloses a transfer charge box for an ignition device, which comprises a transfer charge box body, a gasket, a cover sheet and ignition powder.

[0005] The transfer charge box body is provided with a transfer hole at the bottom and a stepped surface inside.

[0006] The gasket is located between the ignition powder and the transfer hole and covers the entire transfer hole.

[0007] The cover sheet is a bowl-shaped structure, the ignition powder is reversely buckled in the transfer charge box body, the height of the cover sheet is less than the stepped surface in the transfer charge box body, the cover sheet can press the transfer charge, and the cover sheet and the transfer charge box body are adhesively fixed.

[0008] Further, the transfer charge box body is provided with an external thread for connecting the ignition device.

[0009] Further, the bottom end of the external thread is provided with a positioning surface for limiting the assembly position of the transfer charge box.

[0010] Further, the transfer charge box body adopts a material with strong structural strength, and the material is stainless steel.

[0011] Further, the gasket is made of aluminum foil or tin foil material, and the aluminum foil is in an annealed state.

[0012] Further, the gasket is adhesively fixed to the inner bottom surface of the transfer charge box body, and the thickness of the gasket is determined according to the designed opening pressure of the transfer charge box.

[0013] Furthermore, the cover is made of fusible celluloid or nitrocellulose film, which can be melted during operation and can also be opened under the impact of initial ignition energy.

[0014] Furthermore, the cover and the ignition box body are bonded together, and the bonding material can be epoxy resin. The resin should penetrate into the gap between the cover and the ignition box body and overflow to cover the stepped surface of the ignition box body.

[0015] Furthermore, the cover plate should have an effective fire-transfer area of ​​at least 70% of its own diameter and greater than or equal to 10 mm outside the coverage area of ​​the adhesive.

[0016] Furthermore, the ignition propellant is a granular propellant that is sensitive to flame and can be rapidly ignited by the initial ignition energy to release ignition energy.

[0017] The present invention has the following advantages:

[0018] This invention presents a simple ignition transfer box with granular powder as the ignition propellant. It can be reliably ignited by the initial ignition element and rapidly combusts to amplify the ignition energy, thereby quickly igniting the main charge of the ignition device. This effectively shortens the ignition delay time of the ignition device and improves the consistency of the ignition delay time. The ignition transfer box enables reliable and rapid ignition transfer from the ignition element to the main charge of ignition. It is reasonably designed, simple in structure, and highly adaptable to the environment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that, for clarity and ease of explanation, the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the ignition box structure for the ignition device of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the ignition box of the present invention;

[0022] Figure 3 This is a schematic diagram of the cover plate structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the bonding between the ignition box body and the cover plate of the present invention;

[0024] The markings in the diagram are: 1-ignition powder box body, 2-gasket, 3-cover, 4-ignition powder, 5-step surface, 6-external thread, 7-positioning surface, 8-adhesive, 9-bonding surface.

[0025] Specific implementation methods

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] In this embodiment, the structure of the ignition cartridge for the ignition device is as follows: Figure 1 As shown, it includes a ignition box body 1, a gasket 2, a cover 3, and ignition powder 4;

[0028] The bottom of the ignition box 1 is provided with an ignition hole, and the interior is provided with a stepped surface 5.

[0029] The gasket 2 is located between the ignition charge 4 and the ignition hole, covering the entire ignition hole;

[0030] The gasket 2 is made of aluminum foil or tin foil, wherein the aluminum foil should be in an annealed state. The aluminum foil is adhered to the bottom surface of the inside of the fire-transfer box 1, covering the bottom fire-transfer hole. The thickness of the aluminum foil should be determined according to the designed opening pressure of the fire-transfer box.

[0031] The cover plate 3 has a bowl-shaped structure, and the ignition powder 4 is inverted inside the ignition powder box 1. The height of the cover plate 3 is less than the step surface 5 inside the ignition powder box 1. The cover plate 3 and the ignition powder box 1 are glued and fixed.

[0032] like Figure 2 As shown in the schematic diagram of the ignition box body structure, the ignition box body 1 has strong structural strength. Preferably, it is made of stainless steel. The size of its ignition hole and the design of the mechanical interface take into account the material strength to ensure that its structure is intact and there is no obvious deformation during the ignition process. The bottom of the ignition box body 1 has a ignition hole. The total area of ​​the ignition hole can release the combustion energy of the ignition powder in time to prevent the pressure inside the ignition box from being too high, which would cause the ignition box body to deform or the mechanical connection structure to fail.

[0033] The ignition cartridge body has external threads 6 for connection with the ignition device;

[0034] The threaded bottom end has a positioning surface 7, which is used to define the assembly position of the ignition powder box; the inside of the ignition powder box body 2 has a step, which is used to increase the bonding area between the cover plate 3 and the ignition powder box body 1.

[0035] like Figure 3 As shown in the schematic diagram of the cover plate 3, the cover plate 3 is a bowl-shaped structure that is inverted inside the ignition powder box 1. The height of the cover plate 3 is less than the height of the step surface 5 of the ignition powder box 1, so as to press the ignition powder tightly, prevent the ignition powder from shaking and rubbing inside the box, and improve environmental adaptability.

[0036] The cover is made of fusible celluloid or nitrocellulose film, which can be melted during operation or opened under the impact of initial ignition energy.

[0037] like Figure 4 The schematic diagram of the bonding between the ignition box body 1 and the cover is shown. The cover 3 and the ignition box body 1 are bonded with epoxy adhesive. The bonding should be reliable. The adhesive should penetrate into the gap between the cover and the ignition box body 1 and overflow to cover the step of the ignition box body 1. The adhesive should not completely cover the cover.

[0038] Preferably, a reliable flame transfer area with a diameter of at least 70% of the cover plate diameter and not less than φ10mm should be reserved.

[0039] Preferably, the ignition powder 4 is a particulate powder that is sensitive to flame and can be black powder, which can be quickly ignited by the initial ignition energy and release ignition energy.

[0040] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make possible variations and modifications to the technical solutions of the present invention using the disclosed methods and techniques without departing from the spirit and scope of the invention. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, are all within the protection scope of the present invention. Content not described in detail in this specification is common knowledge to those skilled in the art.

Claims

1. A ignition powder box for an ignition device, characterized in that: Includes the ignition box body, gasket, cover, and ignition powder; in, The bottom of the ignition box is provided with a ignition hole, and the interior is provided with a stepped surface. The gasket is located between the ignition charge and the ignition hole, covering the entire ignition hole; The cover is a bowl-shaped structure, and the ignition powder is inverted inside the ignition powder box. The height of the cover is less than the stepped surface inside the ignition powder box. The cover and the ignition powder box are bonded and fixed together. The cover is made of fusible celluloid or nitrocellulose film, which can be melted during operation or opened under the impact of initial ignition energy. The adhesive material used to bond the cover and the ignition box body is epoxy resin. The epoxy resin seeps into the gap between the cover and the ignition box body and overflows to cover the stepped surface of the ignition box body. The cover plate should have an effective fire-transfer area of ​​more than 70% of its own diameter and greater than or equal to φ10 mm outside the coverage area of ​​the adhesive liquid; The ignition propellant is a granular propellant that is sensitive to flame and can be rapidly ignited by initial ignition energy to release ignition energy.

2. The ignition box for an ignition device as described in claim 1, characterized in that: The ignition cartridge has external threads for connecting to the ignition device.

3. A ignition box for an ignition device as described in claim 2, characterized in that: The bottom end of the external thread is provided with a positioning surface to define the assembly position of the ignition powder box.

4. A ignition box for an ignition device as described in claim 1, characterized in that: The ignition box body is made of a high-strength material, namely stainless steel.

5. A ignition box for an ignition device as described in claim 1, characterized in that: The gasket is made of aluminum foil or tin foil, wherein the aluminum foil is in an annealed state.

6. A ignition box for an ignition device as described in claim 1, characterized in that: The gasket is bonded to the bottom surface inside the ignition box, and the thickness of the gasket is determined according to the designed opening pressure of the ignition box.

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