Electric igniter and packaging barrel

Abstract

The utility model discloses an electric igniter and a packing cylinder, which comprise a fire transfer tube, a sealing cylinder is sleeved outside the fire transfer tube and seals and covers one end of the fire transfer tube, and a flame expanding grain is arranged in the fire transfer tube; one end of the ignition tube is connected with the other end of the fire transfer tube, a gland is arranged at the other end, far away from the fire transfer tube, of the ignition tube, an electric ignition head is arranged in the ignition tube, an ignition powder bag wraps the outer portion of the electric ignition head, and the electric ignition head is connected with an extension wire. The extension lead penetrates out of the gland and is connected with a plug, and a short circuit plate is arranged at the plug; wherein the sealing cylinder can be separated from the fire transfer tube, so that the electric igniter is connected with a solid rocket engine through the fire transfer tube. The solid rocket engine is an independent electric igniter, and it can be guaranteed that the solid rocket engine does not need to be provided with the igniter, so that the carrying safety and different ignition requirements are guaranteed.

Description

Technical Field

[0001] This application belongs to the field of pyrotechnics technology, specifically relating to an electric igniter and a packaging tube for the electric igniter. Background Technology

[0002] In related technologies, in a typical solid rocket motor, the igniter is located inside the solid rocket motor, with wires extending out to connect to the outside and supply electricity for ignition.

[0003] However, when the safety requirements of solid rocket engines are high, or when solid rocket engines use both electric ignition and manual ignition (but not electric ignition), the aforementioned built-in igniter cannot meet the functional and safety requirements. Utility Model Content

[0004] This application aims to provide a separate electric igniter to ensure the safety of solid rocket motors and meet different ignition requirements, and adopts the following technical solution:

[0005] An electric igniter, comprising:

[0006] A ignition tube, wherein a sealing cylinder is fitted over the outside of the ignition tube and covers one end of the ignition tube, and a flame-spreading propellant column is disposed inside the ignition tube; and

[0007] An ignition tube, one end of which is connected to the other end of the ignition tube, and a cap is provided at the other end of the ignition tube away from the ignition tube. An electric ignition head is provided inside the ignition tube, and an ignition charge is wrapped around the electric ignition head. An extension wire is connected to the electric ignition head, and the extension wire passes through the cap and is connected to a plug. A short circuit board is provided at the plug.

[0008] The sealing cylinder can be separated from the ignition tube, thereby connecting the electric igniter to the solid rocket motor through the ignition tube.

[0009] Furthermore, the electric igniter does not ignite within 5 minutes at 1A and 1W.

[0010] Furthermore, the pins of the electric ignition head are welded to the extension wire, and a heat-shrink tubing is fitted over the welded area.

[0011] Furthermore, an inner sealing plug is provided inside the ignition tube, and the extension wire passes through the inner sealing plug.

[0012] Furthermore, an outer sealing plug is provided at the ignition tube and the cap, and the extension wire passes through the outer sealing plug.

[0013] Furthermore, a sealing gasket is provided between the capped end of the fire transmission tube and the sealing cylinder.

[0014] Furthermore, the ignition tube is threadedly connected to the sealing cylinder, and the ignition tube is threadedly connected to the ignition tube. The thread direction at the connection between the ignition tube and the sealing cylinder is opposite to the thread direction at the connection between the ignition tube and the ignition tube.

[0015] This application also includes a packaging tube for containing the electric igniter, comprising a tube body, one end of which is closed and the other end is open, a tube cap is provided at one end of the open end, a sealing ring is provided between the tube cap and the tube body, and an aluminum-plastic bag is provided inside the tube body.

[0016] The beneficial effects of this application are:

[0017] This application can be stored separately when ignition is not required without affecting the safety of the solid rocket motor. In addition, it can be directly connected to the solid rocket motor to complete ignition when some solid rocket motors cannot use the internal igniter. Attached Figure Description

[0018] Figure 1 This is a partial schematic diagram of an embodiment of the electric igniter of this application;

[0019] Figure 2 This is a schematic diagram of the internal structure of the electric igniter embodiment of this application;

[0020] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the electric igniter placed in the packaging tube according to an embodiment of this application;

[0022] In the picture: 1. Electric igniter;

[0023] 100 flame transfer tube, 110 sealing cylinder, 120 flame diffuser charge, 130 sealing gasket;

[0024] 200 Ignition tube, 210 electric igniter head, 220 ignition charge, 230 extension wire, 240 heat shrink tubing, 250 inner sealing plug, 260 outer sealing plug, 270 wire tubing, 280 pressure cap.

[0025] 300 plug;

[0026] 400 short circuit board;

[0027] 500 cylinder,

[0028] 600 cylinder cap;

[0029] 700 aluminum-plastic bag;

[0030] 800 sealing ring. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] Reference Figure 1-3 This application provides an electric igniter, comprising:

[0033] A flame transfer tube 100, wherein a sealing cylinder 110 is fitted over the outside of the flame transfer tube 100 and seals one end of the flame transfer tube 100, and a flame diffuser charge 120 is disposed inside the flame transfer tube 100; and

[0034] An ignition tube 200 is provided, one end of which is connected to the other end of the ignition tube 100. A cap 280 is provided at the other end of the ignition tube 200 away from the ignition tube 100. An electric ignition head 210 is provided inside the ignition tube 200. An ignition charge 220 is wrapped around the electric ignition head 210. An extension wire 230 is connected to the electric ignition head 210. The extension wire 230 passes through the cap 280 and is connected to a plug 300. A short circuit board 400 is provided at the plug 300.

[0035] The sealing cylinder 110 can be separated from the ignition tube 100, thereby connecting the electric igniter to the solid rocket motor through the ignition tube 100.

[0036] Specifically, the ignition charge 220 is black powder wrapped in silk cloth, with the black powder wrapped around the electric igniter head 210 and the silk cloth wrapped around the black powder. When using the electric igniter, the sealing cylinder 110 is removed, and the electric igniter is installed at the interface of the solid rocket engine or other equipment. The short-circuit board 400 is then removed, and the plug 300 is inserted into the power interface. The circuit before the electric igniter is connected to the power supply is open. During ignition, the switch (circuit) closes, and current flows through the electric igniter head 210, causing it to ignite and ignite the ignition charge 220. The ignition charge 220 then ignites the diffuser charge 120, thereby achieving solid rocket engine ignition.

[0037] In addition, the ignition charge 220 can contain black powder. The flame spreader 120 is a ignition and propagation component, which can be made of pressed black powder and has a central hole inside. The outer diameter of the flame spreader 120 can be 4 mm, and the diameter of the central hole is 1 mm. The use of an electric igniter 210 and a black powder structure ensures a certain pressure during ignition, and under a certain pressure, ensures the instantaneous nature of ignition.

[0038] It is understood that the electric ignition head 210 can be a momentary induction electric ignition head 210, which does not ignite within 5 minutes at 1A and 1W, but reliably ignites within 50ms when a current of not less than 5A is applied to the electric ignition head 210, thereby ensuring electromagnetic compatibility requirements.

[0039] It is understood that the pins of the electric ignition head 210 are welded to the extension wire 230, and the welded part is covered with a heat shrink tubing 240.

[0040] Specifically, the pin of the electric ignition head 210 is a single-strand wire, while the extension wire 230 can be a multi-strand wire.

[0041] Reference Figure 2 It is understood that an inner sealing plug 250 is provided inside the ignition tube 200, and the extension wire 230 passes through the inner sealing plug 250.

[0042] Specifically, the end of the ignition tube 100 connected to the ignition tube 200 has an annular protrusion inside, and the inner sealing plug 250 is provided on the inner side of the annular protrusion. The inner sealing plug 250 has an inner hole for the extension wire 230 to pass through, and the diameter of the inner hole is smaller than the diameter of the extension wire 230 to increase the resistance during the movement of the wire. The inner sealing plug 250 can be made of rubber material such as silicone rubber, with a Shore hardness of 50 to 55 degrees.

[0043] Furthermore, by properly controlling the distance between the heat shrink tubing 240 and the inner sealing plug 250, after assembly, the heat shrink tubing 240 just contacts the inner sealing plug 250. If the wire moves, the heat shrink tubing 240 will impede its movement. Based on the foregoing, it has been verified that when the plug 300 is held by hand and the ignition assembly of the electric igniter is dropped freely from the plug 300, the wire resistance does not change when the drop distance reaches 3m.

[0044] Reference Figure 2 It is understood that an outer sealing plug 260 is provided at the ignition tube 200 and the pressure cap 280, and the extension wire 230 passes through the outer sealing plug 260.

[0045] Specifically, an outer sealing plug 260 is provided on the outer side of the annular protrusion. The outer sealing plug 260 also has an inner hole for the extension wire 230 to pass through, and the diameter of the inner hole is smaller than the diameter of the extension wire 230. The outer sealing plug 260 can also be made of rubber materials such as silicone rubber with a Shore hardness of 50 to 55 degrees. When the sealing cap presses the outer sealing plug 260, the outer sealing plug 260 is easily deformed, thereby pressing the wire, but without damaging the wire or increasing the friction of the wire movement.

[0046] Reference Figure 1 It is understood that a sealing gasket is provided between the capped end of the fire transmission tube 100 and the sealing cylinder 110.

[0047] Specifically, the sealing cylinder 110 is used to protect the flame transfer tube 100 from external impact during transportation, while the sealing gasket is used to seal the opening of the flame transfer tube 100 to prevent moisture.

[0048] Reference Figure 1 It is understood that the ignition tube 100 is threadedly connected to the sealing cylinder 110, and the ignition tube 200 is threadedly connected to the ignition tube 100. The thread direction at the connection between the ignition tube 100 and the sealing cylinder 110 is opposite to the thread direction at the connection between the ignition tube 100 and the ignition tube 200.

[0049] Specifically, the two connecting parts of the ignition tube 100 have different thread directions. The outer wall of the ignition tube 100 has an external thread, while the connection between the ignition tube 100 and the ignition tube 200 has an internal thread. The external thread connects to the sealing cylinder 110 and is also used to install the electric igniter onto the solid rocket motor. The internal thread connects to the ignition tube 200. The opposite thread directions prevent the ignition assembly from being loosened when removing the sealing cylinder 110 or installing the igniter onto the solid rocket motor, thus preventing damage to the electric ignition head 210. Additionally, a screw can be added between the ignition tube 100 and the ignition tube 200 to prevent loosening.

[0050] Reference Figure 4 This application also includes a packaging tube for containing the electric igniter 1, including a tube body 500, one end of which is closed and the other end is open, a tube cap 600 is provided at the open end, a sealing ring is provided between the tube cap 600 and the tube body 500, and an aluminum-plastic bag 700 is provided inside the tube body 500.

[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. An electric igniter, characterized in that, include: A flame-transmitting tube, wherein a sealing cylinder is fitted over the outside of the flame-transmitting tube and one end of the flame-transmitting tube is sealed, and a flame-expanding propellant column is provided inside the flame-transmitting tube. as well as An ignition tube, one end of which is connected to the other end of the ignition tube, and a cap is provided at the other end of the ignition tube away from the ignition tube. An electric ignition head is provided inside the ignition tube, and an ignition charge is wrapped around the electric ignition head. An extension wire is connected to the electric ignition head, and the extension wire passes through the cap and is connected to a plug. A short circuit board is provided at the plug. The sealing cylinder can be separated from the ignition tube, thereby connecting the electric igniter to the solid rocket motor through the ignition tube.

2. The electric igniter according to claim 1, characterized in that, The electric igniter does not ignite within 5 minutes at 1A and 1W.

3. An electric igniter according to claim 1 or 2, characterized in that, The pins of the electric ignition head are welded to the extension wire, and the welded area is covered with a heat-shrink tubing.

4. An electric igniter according to claim 1, characterized in that, An inner sealing plug is provided inside the ignition tube, and the extension wire passes through the inner sealing plug.

5. An electric igniter according to claim 1, characterized in that, An outer sealing plug is provided at the ignition tube and the cap, and the extension wire passes through the outer sealing plug.

6. An electric igniter according to claim 1, characterized in that, A sealing gasket is provided between the capped end of the fire transmission tube and the sealing cylinder.

7. An electric igniter according to claim 1, characterized in that, The ignition tube is threadedly connected to the sealing cylinder, and the ignition tube is threadedly connected to the ignition tube. The thread direction at the connection between the ignition tube and the sealing cylinder is opposite to the thread direction at the connection between the ignition tube and the ignition tube.

8. A packaging tube, characterized in that, The packaging tube is used to hold an electric igniter as described in claim 1, and includes a tube body, one end of which is closed and the other end is open. A tube cap is provided at one end of the opening, and a sealing ring is provided between the tube cap and the tube body. An aluminum-plastic bag is provided inside the tube body.

Images