A device for training submunition warhead delay initiation

Abstract

The application discloses a device for training a submunition warhead to delay ignition, which comprises a device upper body and a device lower body, the device lower body is provided with a double-propellant-column circular hole, a half-circular groove for transmitting fire, a concentric central hole and a locking screw hole, a 45-degree arc-shaped groove is arranged at the bottom of the propellant-column circular hole to expand the fire transmission area; the device upper body is provided with a countersunk mounting hole, a bottom accommodating circular hole and an outer connecting thread; a delay propellant column is preassembled at the device lower body and then embedded into the device upper body as a whole, and a countersunk screw is used for locking and fixing, and the whole is quickly assembled to the training submunition warhead through the outer thread. The device is processed in a split mode of an aluminum rod, has a simplified structure, and is convenient to assemble through the gap cooperation of parts, the double-path independent delay fire transmission structure can withstand high overloads during launching, and is compatible with two energy input modes of direct ignition of a parent bullet fuze and electric initiation; the device replaces a traditional complex delay fuze, has low production cost, is quickly disassembled and assembled, can stably and accurately delay ignition of a warhead smoke and light emitting agent, and is suitable for a submunition training submunition terminal target indication fire transmission sequence.

Description

Technical Field

[0001] This invention relates to the field of pyrotechnics and ammunition technology, specifically to a device for delaying the ignition of a training bullet warhead. Background Technology

[0002] In recent years, the simulation of live-fire ballistics by various training bullets has become increasingly sophisticated. The target indication function at the ballistic endpoint relies on the initial ignition energy output by the parent bullet fuse, which ignites the delay device and then the smoke and light-emitting indicator agent. This ignition sequence requires reliable input energy and stable delay accuracy.

[0003] The delay device is filled with a delaying propellant, and the ignition / detonation delay is controlled by the burning time of the propellant. It has stringent requirements regarding the uniformity of combustion, mechanical sensitivity, and physicochemical stability of the propellant. Existing ignition delay devices are complex in structure, have many parts, and are costly to manufacture and assemble. They also lack ignition reliability under high overload firing conditions, are cumbersome to disassemble and assemble, and have a high learning curve for operators, making them unsuitable for the low-cost production and rapid assembly of large quantities of training ammunition. Therefore, there is an urgent need to develop a delayed ignition device that is structurally simple, easy to assemble, low-cost, and provides safe and reliable ignition under high overload conditions. Summary of the Invention

[0004] This invention provides a device for delayed ignition of the warhead of training bullets, which solves the technical problems of existing delayed ignition devices for training bullets, such as complex structure, high cost, cumbersome assembly, and poor reliability under high overload. By adopting a modular split structure, the overall structure of the delayed component is simplified, and stable delayed ignition is achieved by using dual independent delayed propellant columns. This results in cost reduction and efficiency improvement, rapid disassembly and assembly, and safe and reliable delayed ignition of the smoke and light-emitting propellant in high overload environments.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a device for delaying the ignition of a training bullet warhead, comprising an upper body and a lower body. The upper body has a bottom circular hole in the middle of its bottom and a threaded hole in the middle of its center that communicates with the bottom circular hole. The lower body has a central hole in the middle that is coaxial and concentric with the threaded hole on the upper body. Two semicircular grooves for ignition transmission are symmetrically arranged on both sides of the central hole. Two circular holes for loading delay propellant are symmetrically arranged at the ends of the two semicircular grooves. Each circular hole is connected to the corresponding semicircular groove. Two arc-shaped grooves are symmetrically arranged at the bottom of the lower body. Each arc-shaped groove is connected to the corresponding circular hole. The lower body is assembled into the bottom circular hole of the upper body and can be fixed together.

[0006] The upper and lower parts of the device are fixed together by means of countersunk holes symmetrically provided on both sides of the upper part of the device and communicating with the bottom circular hole, and two countersunk threaded holes symmetrically provided on both sides of the lower part of the device. The two countersunk threaded holes are concentric with the corresponding two countersunk holes. Two countersunk screws pass through the corresponding countersunk holes and countersunk threaded holes to connect and fix the upper and lower parts of the device together.

[0007] Both of the arc-shaped grooves have a central angle of 45°.

[0008] The upper and lower parts of the device, as well as the delayed-action propellant and the corresponding propellant hole, are all clearance fits.

[0009] Both the upper and lower parts of the device are made of aluminum rods.

[0010] The device for delayed ignition of a training bullet warhead, designed using the above-described technical solution, has the following advantages: 1. Replacing the traditional independent and complex fuse structure, it relies on a double-delay propellant to achieve stable delayed ignition under high overload conditions. The number of parts is greatly reduced, the processing cost of aluminum rod raw materials is low, and the production cost of training bullet pyrotechnics is significantly reduced, achieving cost reduction and efficiency improvement in mass production. 2. The split-type modular structure is strong enough to withstand high overload conditions during ammunition launch. The dual ignition channels and the 45° arc groove at the bottom increase the ignition contact area and stabilize the ignition path. Tests have verified that it can safely, reliably, and accurately delay the ignition of the smoke and light-emitting propellant in the warhead. 3. All mating pairs adopt clearance fit and countersunk screw single-point locking structure. The assembly and disassembly steps are simple, no special tooling is required, the skill threshold of operators is reduced, and the threaded assembly and disassembly of the training bullet warhead can be completed quickly. 4. The dual-path independent delayed charge structure is adapted to the submunition ignition sequence and is compatible with both electric initiator ignition and direct ignition of the submunition fuse, making it widely applicable and highly versatile. Attached Figure Description

[0011] Figure 1 This is a schematic diagram showing the overall assembly cross-sectional structure of the present invention; Figure 2 A cross-sectional view of the assembled delayed-release drug column of the present invention; Figure 3 This diagram shows a cross-sectional view of the upper body of the device of the present invention. Figure 4 A top view of the structure of the upper body of the device of the present invention; Figure 5 A cross-sectional view of the lower body of the device of the present invention; Figure 6 A schematic diagram showing the left cross-sectional structure of the lower body of the device of the present invention; Figure 7 A top view of the lower part of the device of the present invention; Figure 8 A bottom view of the lower part of the device of the present invention; Figure 9 A cross-sectional view of the delayed-release drug column of the present invention; Figure 10 This is a schematic diagram showing the structure of the countersunk screw in the device of the present invention.

[0012] In the diagram: 1-Upper body of the device, 2-Counterhead screw, 3-Lower body of the device, 4-Delaying charge, 5-Counterhead hole, 6-Bottom round hole, 7-Ignition semi-circular groove, 8-Counterhead threaded hole, 9-Combustion charge round hole, 10-Center hole, 11-Arc groove, 12-Threaded hole. Detailed Implementation

[0013] The following description, in conjunction with the accompanying drawings, details an apparatus for delayed ignition of a training bullet warhead according to the present invention.

[0014] This invention relates to a device for training delayed ignition of a bullet warhead, see [link to related document]. Figures 1 to 10The device comprises an upper body 1 and a lower body 3, both made of aluminum rods. A bottom circular hole 6 is located in the center of the bottom of the upper body 1, accommodating the lower body 3 after the delayed-ignition charge 4 has been assembled. A threaded hole 12, communicating with the bottom circular hole 6, is located in the center of the upper body 1. A central hole 10, coaxial and concentric with the threaded hole on the upper body 1, is located in the center of the lower body 3. This concentric through-hole transmits the energy from the parent bomb's fuse detonation to ignite the delayed-ignition device and the parent bomb's opening chamber of the warhead in each training bullet. Two symmetrically arranged semi-circular grooves 7 are located on either side of the central hole 10. Two propellant charge holes 9, symmetrically arranged at the ends of the two semi-circular grooves 7, are used to load the delayed-ignition charge 4. These holes delay the ignition of the smoke-emitting and luminous agents within the training bullet's warhead. Each propellant charge hole 9 is connected to a corresponding ignition semicircular groove 7. The two ignition semicircular grooves 7 are used to transfer the energy from the parent bomb fuse to ignite the delay propellant charge 4. Two arc-shaped grooves 11 are symmetrically arranged at the bottom of the lower body 1 of the device. Both arc-shaped grooves 11 are arc-shaped grooves with a central angle of 45°. Each arc-shaped groove 11 is connected to a corresponding propellant charge hole 9. The two arc-shaped grooves 11 are used to increase the ignition contact area with the propellant in the warhead of the training bullet. Countersunk holes 5 are symmetrically arranged on both sides of the upper body 1, communicating with the bottom circular holes 6. Two countersunk threaded holes 8 are symmetrically arranged on both sides of the lower body 3 of the device. The two countersunk threaded holes 8 are concentric with the two corresponding countersunk holes 5. The lower body 3 of the device is assembled into the bottom circular hole 6 of the upper body 1 of the device. Two countersunk screws 2 pass through the corresponding countersunk holes 5 and countersunk threaded holes 8 to connect and fix the upper body 1 and the lower body 3 of the device together, forming a complete delay ignition device. The delayed ignition device is inserted into the center hole of the training bullet warhead through the center hole 10 of the lower body 3, and the external thread of the upper body 1 engages with the internal thread of the training bullet warhead shell opening to form a training bullet warhead with a delayed ignition device. In this invention, the upper body 1 and the lower body 3, as well as the delayed propellant 4 and the corresponding propellant 9, are all clearance fits.

[0015] The assembly steps of this invention are as follows: Step 1: Insert two delayed-action propellant charges 4 horizontally into the propellant charge holes 9 on both sides of the lower body 3 of the device to form the lower body propellant loading assembly; Step 2: Insert the lower body loading assembly into the bottom round hole 6 of the upper body 1 from bottom to top, so that the threaded hole of the upper body 1 and the center hole 10 of the lower body 3 are automatically coaxial, and the countersunk hole 5 corresponds one-to-one with the countersunk threaded hole 8. Step 3: Two countersunk screws 2 pass through the countersunk hole 5 from top to bottom and are tightened into the countersunk threaded hole 8, locking the upper body 1 and the lower body 3 of the device to form a complete delayed ignition assembly. Step 4: Insert the delayed ignition assembly into the warhead of the training bullet. Insert the center hole 10 of the lower body 3 of the device into the center hole of the warhead. Rotate the upper body 1 of the device and tighten it by means of the external thread and the internal thread of the opening of the warhead shell. Step 5: Connect the external thread on the top of the device to the internal thread of the connecting pipe of the mother bomb, and connect the through hole in the connecting pipe to the fuse of the mother bomb, thus completing the assembly of the entire ignition sequence.

[0016] The working principle of this invention is compatible with two ignition energy input paths: The first type of electric initiation ignition: The electric initiator detonates the electric ignition head, and the energy of the electric ignition head ignites the agent in the ignition box. The energy output from the ignition box is divided into two paths: one path conducts energy along the central hole 10, igniting the delay charge 4 via the ignition semicircular groove 7. The other path directly ignites the agent in the parent projectile's open-chamber ignition box. The propellant gases propel the training bullet's warhead out of the parent projectile casing. After the delay charge 4 has burned for the preset delay time, i.e., when the delay charge reaches the set delay time, the bottom 45° arc-shaped groove 11 outputs a large-area flame, igniting the smoke- and light-emitting agent in the next stage training bullet's warhead, achieving ballistic endpoint target indication.

[0017] The second type of direct ignition of the mother bomb fuse: the energy from the detonation of the mother bomb fuse ignites the propellant in the ignition box. The energy output of the ignition box is also divided into two paths. Its subsequent ignition, bomb ejection, and delay indication process is completely consistent with the first type of electric detonation ignition.

Claims

1. A device for training delayed ignition of a bullet warhead, comprising an upper body and a lower body, characterized in that: The upper body of the device has a bottom circular hole in the middle, and a threaded hole in the middle of the upper body that communicates with the bottom circular hole; the lower body of the device has a central hole in the middle that is coaxial and concentric with the threaded hole on the upper body, and two flaming semicircular grooves are symmetrically arranged on both sides of the central hole. At the ends of the two flaming semicircular grooves, two propellant round holes for filling delay propellant are symmetrically arranged, and each propellant round hole communicates with the corresponding flaming semicircular groove. Two arc-shaped grooves are symmetrically arranged at the bottom of the lower body of the device, and each arc-shaped groove communicates with the corresponding propellant round hole; the lower body of the device is assembled into the bottom circular hole of the upper body of the device and can be fixed together.

2. The device for delayed ignition of a training bullet warhead according to claim 1, characterized in that: The upper and lower parts of the device are fixed together by means of countersunk holes symmetrically provided on both sides of the upper part of the device and communicating with the bottom circular hole, and two countersunk threaded holes symmetrically provided on both sides of the lower part of the device. The two countersunk threaded holes are concentric with the corresponding two countersunk holes. Two countersunk screws pass through the corresponding countersunk holes and countersunk threaded holes to connect and fix the upper and lower parts of the device together.

3. The device for delayed ignition of a training bullet warhead according to claim 1, characterized in that: Both of the arc-shaped grooves have a central angle of 45°.

4. The device for delayed ignition of a training bullet warhead according to claim 1, characterized in that: The upper and lower parts of the device, as well as the delayed-action propellant and the corresponding propellant hole, are all clearance fits.

5. The device for delayed ignition of a training bullet warhead according to claim 1, characterized in that: Both the upper and lower parts of the device are made of aluminum rods.

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