Conical double-W-bridge parallel ignition assembly

Abstract

The utility model discloses a cone-shaped double 'W' bridge parallel ignition assembly, which comprises an electrode plug (1), a radiating fin (2), an insulating ring (3), a bridge (4) and sealant, the cone-shaped double 'W' bridge parallel ignition assembly integrates the double 'W' bridge, the cone-shaped phenolic aldehyde electrode plug, the ceramic radiating fin and the blocking type insulating ring into a whole for the first time, and the cone-shaped double 'W' bridge parallel ignition assembly is a missile engine ignition assembly with a novel structure. The problems of poor antistatic property and poor safety of the product are solved. The ignition device has high ignition reliability and safety, can be suitable for ignition of various engines or serving as a power source initiating explosive device, and provides a new thought for ignition design and structure optimization of the engines.

Description

Technical Field

[0001] The utility model belongs to the field of unit pyrotechnics, and particularly relates to a conical double "W" bridge parallel firing assembly, which is mainly applied to technical fields such as missile engine ignition or as a power source pyrotechnic device, etc. Background Art

[0002] Currently, the pyrotechnic devices used in missile engines usually adopt a sensitive design, with poor anti-static performance and safety, and cannot meet the requirements of the complex electromagnetic environment and high-altitude use in modern warfare. In order to improve the operational safety and reliability of missiles, it is necessary to improve the pyrotechnic devices. Content of the Utility Model

[0003] The purpose of the utility model is to provide a conical double "W" bridge parallel firing assembly, and the specific technical solutions are as follows:

[0004] A conical double "W" bridge parallel firing assembly includes an electrode plug, a heat sink, an insulating ring, a bridge, and a sealant. The insulating ring is installed on the heat sink with sealant, and the heat sink is installed into the electrode plug after being coated with sealant. The bridge is in the shape of "W", with a thin waist in the middle, and two "W" - shaped bridges are welded on the heat sink.

[0005] Further, the electrode plug is conical, composed of four pins and phenolic plastic. The input end of the electrode plug is designed with four conical phenolic plastic round platforms, which are installed in two groups with offset positioning. The output end is designed in a groove shape, and the heat sink, insulating ring, and bridge are assembled in the groove.

[0006] Further, the heat sink is processed into a disc shape with four round holes in the middle, and is used to be installed into the groove at the output end of the electrode plug.

[0007] Further, the insulating ring adopts a partition structure to separate the two "W" - shaped bridges, forming two independent firing units.

[0008] Further, the two ends of the "W" - shaped bridge are used for welding pins.

[0009] Further, the pins are in the shape of round pins, with 3 raised φ2.5mm steps processed in the middle, and the four pins are designed to be installed in two groups with offset positioning.

[0010] Advantages of the Utility Model:

[0011] (1) For the first time in China, the utility model integrates the double "W" - type bridge, conical phenolic electrode plug, ceramic heat sink, and partition - type insulating ring into one, which is a missile engine firing assembly with a new structure. It has high firing reliability and safety, can be applied to the ignition of various engines or as a power source pyrotechnic device, and provides a new idea for the design of engine ignition transfer and structural optimization.

[0012] (2) The utility model has high insulation performance and anti-static performance, meeting the insulation and anti-static performance requirements between the product's pins, between the pins and the housing, and between the bridges, ensuring that the product has high insulation and anti-static performance.

[0013] (3) The utility model adopts a taper fit design between the electrode plug input end and the initiator housing, and the pin adopts a three-section convex step and misaligned positioning installation design, improving the overall structural strength and reverse pressure bearing capacity of the product. Protect the ignition component from the impact of high-temperature and high-pressure energy after the product is charged and ignited, ensuring the integrity of the product structure.

[0014] (4) Through the optimized combination design of the electrode plug, heat sink, insulating ring and bridge, the utility model can be matched with all types of primary explosives to form an ignition unit, meeting the key technical requirements such as non-firing at 1A1W5nin, high current resistance of 22A, stray current, and electromagnetic compatibility.

[0015] (5) As an insensitive electro-explosive device, the product of the utility model has a leading domestic comprehensive design level, with high reliability, safety and versatility, and can be widely applied to various engine ignition systems and weapon equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the ignition component structure of the utility model;

[0017] Figure 2 Schematic diagram of the electrode plug structure of the utility model;

[0018] Figure 3 Schematic diagram of the bridge structure of the utility model;

[0019] In the figure, 1 - electrode plug, 2 - heat sink, 3 - insulating ring, 4 - bridge, 5 - pin, 6 - phenolic plastic; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the utility model with reference to the drawings and specific embodiments.

[0021] Embodiment 1

[0022] The ignition component includes an electrode plug 1, a heat sink 2, an insulating ring 3, a bridge 4 and a sealant. After applying the sealant on one side of the heat sink 2, it is inserted into the groove through the four pins 5 of the electrode plug 1. The pins 5 of the electrode plug 1 protruding above the heat sink 2 are ground flat. Two bridges 4 are respectively welded to the 4 pins 5 on the heat sink 2. After applying the sealant on the insulating ring 3, it is installed on the heat sink 2. The two bridges 4 are distributed in the middle of the holes on both sides of the insulating ring 3. As Figure 1 shown.

[0023] The electrode plug 1 is formed into a cone by four pins 5 and phenolic plastic 6 using a compression molding process. At the A end (input end) of the electrode plug, there are four conical phenolic plastic frustums, which are installed in two groups with misaligned positioning. The B end (output end) is designed in a groove shape. As Figure 2 shown.

[0024] The bridge 4 is designed in a "W" shape, with round dots at both ends for welding the pins 5, and the middle is designed in a narrow waist shape. As Figure 3 shown.

[0025] The overall design of the electrode plug 1 is conical, formed by four pins 5 and FQBD-12 phenolic plastic 6 using a compression molding process, with strong insulation performance, structural strength, and pressure-bearing capacity. At the A end (input end) of the electrode plug, there are four conical phenolic plastic frustums. During assembly, axial positioning of the electrode plug and the initiator housing is carried out, which has high process assembly performance and can also prevent accidental contact between the pins 5 and the initiator housing, isolating and protecting the pins 5 and the initiator housing, and ensuring the insulation performance between the bridge circuits of the electrode plug 1 and between the bridge circuit and the initiator housing; the B end (output end) of the electrode plug is designed in a groove shape, and the heat sink 2, insulation ring 3, and bridge 4 are assembled in the groove, making the overall mechanical structure of the firing assembly more reasonable and ensuring the stable insulation performance between the bridge circuit and the initiator housing at the same time.

[0026] The pins 5 are in the shape of round pins, with three raised φ2.5mm steps machined in the middle. The four pins 5 are designed to be installed in two groups with misaligned positioning, enhancing the contact strength between the pins and the FQBD-12 phenolic plastic 6, ensuring the structural integrity of the product, and avoiding the pins being ejected from the electrode plug by high-temperature and high-pressure gases generated after the product is charged and fired; the surface of the pins 5 is gold-plated, ensuring non-corrosion in harsh environments and ensuring reliable contact between the input end of the product and the power input plug of the weapon system. The FQBD-12 phenolic plastic 6 has the characteristics of corrosion resistance and high insulation performance, and can meet the use requirements of the product in environments such as humidity and heat.

[0027] Both the heat sink 2 and the insulation ring 3 are made of alumina A-95 ceramic by machining. The ceramic material has advantages such as good heat dissipation performance and high anti-static performance, which is beneficial to improving the non-firing reliability and anti-static ability of the product. The heat sink 2 is machined into a round plate shape with four round holes in the middle for being installed in the groove at the B end (output end) of the electrode plug.

[0028] The insulation ring 3 is machined into a round ring shape with a partition in the middle. The partition in the middle isolates the two bridges 4, improving the insulation strength and anti-static ability between the two bridge circuits of the product. At the same time, two independent firing units are formed, ensuring that when a firing current is input to any bridge circuit, the normal output function of the product can be realized. The parallel connection of the two bridges belongs to a redundant design and has high firing reliability.

[0029] The bridge 4 is made of high-resistance electrothermal alloy strip Cr20Ni80 material with corrosion resistance and stable performance. Its structure is designed in a "W" shape and is processed by precision wire cutting. The bridge is exquisitely designed and thin in thickness. The two end dots are welded to the pins 5 on the ceramic heat sink 2 by energy storage welding, having a large surface area and contact area with the heat sink 2, and thus having good heat dissipation performance. When stray current and other factors act on the product, the safety of the product is improved through the two end heat dissipation surfaces, meeting the requirement that the product does not ignite under 1A 1W for 5 minutes. The middle of the bridge 4 is designed in a narrow-waist shape. For a relatively large input power, electrical energy is converted into heat energy, and the temperature of the bridge 4 rises rapidly, which is conducive to heat concentration and igniting the agent inside the initiating insulation ring 3, having a high ignition sensitivity.

[0030] The sealant is prepared by mixing epoxy resin and polyamide resin in a ratio of 2:1. Epoxy resin sealant is applied to the bonding parts of the electrode plug 1, the heat sink 2 and the insulation ring 3 to integrate the three into a whole, ensuring that the initiating component can work reliably under harsh natural environments and severe mechanical environments.

[0031] After assembly, the resistance of any bridge circuit of the product is within the range of 1.0Ω ± 0.2Ω, and the insulation resistance between pins, between pins and the initiator housing is greater than 20MΩ (DC 500V), meeting the technical index requirements such as firing at 5A, action time less than 10ms, not igniting under 1A 1W for 5 minutes, anti-static of 25kV, withstanding large current of 22A, operating at high and low temperatures of -50°C to +60°C, electromagnetic compatibility, firing reliability of 0.9999, and long-term storage for 15 years.

[0032] Action process: When the working current is supplied to the product, the bridge inside the product converts electrical energy into heat energy, rapidly increasing the temperature of the agent around the bridge, igniting the agent, and igniting the next-stage charge or providing dynamic gas pressure for the actuating device.

Claims

1. A conical double "W" bridge parallel ignition assembly, comprising an electrode plug (1), a heat sink (2), an insulating ring (3), a bridge (4) and a sealant, characterized in that: The insulating ring (3) is coated with sealant and installed on the heat sink (2). The heat sink (2) is coated with sealant and then installed in the electrode plug (1). The electric bridge (4) is "W" shaped, with a thin waist in the middle. Two "W" shaped electric bridges (4) are welded to the heat sink (2).

2. A conical double "W" bridge parallel ignition assembly according to claim 1, characterized in that: The electrode plug (1) is conical and consists of four pins (5) and phenolic plastic (6). The input end of the electrode plug is designed with four conical phenolic plastic cones, which are installed in two groups with offset positioning. The output end is designed to be groove-shaped, and the heat sink (2), insulating ring (3) and bridge (4) are assembled in the groove.

3. A conical double "W" bridge parallel ignition assembly according to claim 2, characterized in that: The heat sink (2) is processed into a disc shape with four circular holes in the middle, and is used to be installed in the groove at the output end of the electrode plug (1).

4. A conical double "W" bridge parallel ignition assembly according to claim 1, characterized in that: The insulating ring (3) adopts a barrier structure to separate the two "W"-shaped bridges (4) to form two independent ignition units.

5. A conical double "W" bridge parallel ignition assembly according to claim 2, characterized in that: The round points at both ends of the "W"-shaped bridge (4) are used for welding the pins (5).

6. A conical double "W" bridge parallel ignition assembly according to claim 2 or 5, characterized in that: The plug pin (5) is in the shape of a round needle, with three raised φ2.5mm steps processed in the middle, and the four plug pins (5) are divided into two groups for staggered positioning and installation design.

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