Dual axial flame input and output instant / short delay selectable delay tube

Abstract

This invention discloses a dual-axial flame input and output selectable delay tube for instantaneous / short delay, comprising a tube shell, an upper ignition pad, a lower ignition pad, a washer, a first ignition charge, a second ignition charge, a delay charge, and an initiating charge. Ignition holes are located at the center of the top and bottom surfaces of the tube shell. The upper ignition pad, first ignition charge, delay charge, initiating charge, second ignition charge, lower ignition pad, and washer are sequentially filled into the tube shell from top to bottom. The upper ignition pad is located between the first ignition charge and the tube shell, and the washer is located between the lower ignition pad and the tube shell. This invention is used in the setting bolt of the fuse triggering time setting mechanism for medium and large caliber artillery shells. It adopts a dual-axial flame input excitation structure, replacing the original single-direction flame input excitation method of delay tubes. Combined with the setting bolt setting orientation, it achieves selectable modes for both instantaneous and short delay action times. This simplifies the fuse setting mechanism structure, and its small size and simple charge structure facilitate manufacturing and installation.

Description

Technical Field

[0001] This invention belongs to the field of pyrotechnics technology, specifically relating to a dual-axial flame input and output instantaneous / short delay selectable delay tube for setting the trigger time of medium and large caliber artillery projectile fuses. Background Technology

[0002] Fuses, being explosive elements, are a crucial component of pyrotechnic devices. With improvements in fuze performance, functionality, and reliability requirements, the demand for both the variety and quantity of explosive elements in fuses is increasing. However, from the perspective of explosion-proof safety design, simplifying the internal structure of the fuze, and reducing its space occupation, the fewer explosive elements inside the fuze, the better. Therefore, it is desirable for fuze explosive elements to address the need for multi-channel ignition.

[0003] The dual-axial flame input and output instantaneous / short-delay selectable delay tube is a modification of the traditional single-axial input and output delay tube, replacing it with a dual-axial input and output delay tube. Compared to the traditional single-axial input delay tube, the dual-axial flame input and output instantaneous / short-delay selectable delay tube has two-end axial flame excitation input methods, simplifying the fuze structure, saving internal space, and improving fuze safety. Patent CN2673862 discloses a bidirectional flame instantaneous detonator, in which both ends of the detonator shell are provided with ignition holes, and each end of the detonator can be used as a flame input end without directional requirements. However, it does not contain high explosives, and the initiating explosive is located in the middle of the detonator, while the igniting explosive is located on the outer axial side, making it difficult to obtain the sufficient initiation capability required for a detonator. Patent CN113175853 discloses a dual-axial flame input unidirectional output detonator, which has two-end axial flame excitation input methods. This detonator aims to solve the problem of improving ignition capability in both directions, and while maintaining the original axial output power, it is mainly used to solve the problem of fuze insulation design. The detonators disclosed in these two patent documents do not contain a delay charge, and therefore do not involve the issue of selecting between instantaneous / short delay fuse settings. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-axial flame input and output selectable delay tube for setting the trigger time of medium and large caliber projectile fuses, which can be either instantaneous or short-delayed.

[0005] The technical solution to achieve the purpose of this invention is as follows: a dual-axial flame input and output selectable delay tube for instantaneous / short delay, comprising a tube shell, an upper ignition pad, a lower ignition pad, a washer, a first ignition charge, a second ignition charge, a delay charge, and an initiating charge; the tube shell is cylindrical, and the upper ignition pad, the first ignition charge, the delay charge, the initiating charge, the second ignition charge, the lower ignition pad, and the washer are sequentially filled into the tube shell from top to bottom; both the top and bottom ends of the tube shell adopt a constricted structure, which serves as a ignition port after constriction; when the fuze is set to short delay mode, the top end of the tube shell serves as the input end and the bottom end serves as the output end; when the fuze is set to instantaneous mode, the bottom end of the tube shell serves as the input end and the top end serves as the output end; the above two input methods result in opposite detonation sequences for the charges in the delay tube, wherein igniting the delay charge first achieves the short delay mode, while igniting the delay charge subsequently achieves the instantaneous mode.

[0006] Compared with the prior art, the significant advantages of this invention are:

[0007] (1) The delay tube of the present invention adopts a biaxial flame excitation input and output method, replacing the single flame excitation input direction of the original delay tube, which can realize two firing modes: instantaneous and short delay. It can simplify the structure of the fuze setting mechanism, save the internal space of the fuze, and improve the safety of the fuze.

[0008] (2) The structure is simple, the cost is low, it is easy to process and easy to install.

[0009] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the basic structure of the instantaneous / short delay selectable delay tube for the triggering time setting of the large-caliber projectile fuse in this invention.

[0011] Figure 2 This is a schematic diagram illustrating the application of the instantaneous / short delay selectable delay tube for biaxial flame input and output in the fuze setting bolt of the large-caliber projectile fuze triggering time setting in this invention.

[0012] In the diagram, 1 is the shell, 2 is the upper silk pad, 3 is the lower silk pad, 4 is the washer, 5 is the second ignition charge, 6 is the detonating charge, 7 is the delay charge, 8 is the first ignition charge, 9 is the dual-axis flame input and output instantaneous / short delay selectable delay tube for setting the trigger time of medium and large caliber projectile fuses, and 10 is the setting bolt. Detailed Implementation

[0013] The present invention will now be further described with reference to the accompanying drawings.

[0014] Combination Figure 1A dual-axial flame input and output instantaneous / short delay selectable delay tube for setting the trigger time of medium and large caliber artillery shell fuses includes a shell 1, an upper ignition pad 2, a lower ignition pad 3, a washer 4, a first ignition powder 8, a second ignition powder 5, a delay powder 7, and an initiating powder 6. The shell 1 is cylindrical, and the upper ignition pad 2, the first ignition powder 8, the delay powder 7, the initiating powder 6, the second ignition powder 5, the lower ignition pad 3, and the washer 4 are sequentially filled into the shell 1 from top to bottom. The top and bottom of the shell 1 are tapered, serving as ignition holes. The first ignition powder 8, the delay powder 7, the initiating powder 6, and the second ignition powder 5 are all columnar structures, with their outer circumferential walls tightly attached to the inner wall of the shell 1. The lower surface of the washer 4 is tightly attached to the lower surface of the inner wall of the shell 1.

[0015] Combination Figure 2 When the biaxial flame input and output instantaneous / short delay selectable delay tube of this invention is applied to a fuze, it is spot-riveted into the delay tube hole on the mounting pin 10. Before using the fuze, the mounting pin 10 is rotated as needed to position it in the desired position. Figure 2 The position is either rotated 180° to an inverted state, thereby determining the fuse's operating mode. The flame input at end A and the flame output at end B, or vice versa, of the fuse setting bolt 10 represent the ignition or detonation paths for the short-delay and instantaneous firing modes, respectively.

[0016] The tops described in this invention are all Figure 1 The positions shown are at the top and bottom. Figure 1 It is located at the bottom in the diagram.

[0017] The working process of the instantaneous / short delay selectable delay tube with biaxial flame input and output for setting the trigger time of medium and large caliber projectile fuses described in this invention is as follows:

[0018] (1) When the fuse is set to short delay mode, that is, when end A of the setting plug 10 is used as the input end and end B is used as the output end, the flame generated by the ignition cap or ignition head (tube) or relay tube of the fuse ignition mechanism is transmitted to the first ignition powder 8 through the ignition hole at end A of the setting plug 10. The first ignition powder 8 is ignited, which further ignites the delay powder 7. The delay powder 7 burns slowly to obtain a short delay and then detonates the initiating powder 6. The initiating powder 6 then detonates the second ignition powder 5. The delay tube 9 completes the short delay flame output.

[0019] (2) When the fuse is set to the instantaneous action mode, that is, when the B end of the setting plug 10 is used as the input end and the A end is used as the output end, the flame generated by the ignition cap or ignition head (tube) or relay tube of the fuse ignition mechanism is transmitted to the second ignition powder 5 through the ignition hole at the B end of the setting plug 10. The second ignition powder 5 is ignited, which further detonates the initiating explosive 6, and then shatters and detonates the delay explosive 7. The delay explosive 7 then detonates the first ignition explosive 8, and the delay tube 9 completes the instantaneous flame output.

[0020] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dual axial flame input and output flash / short delay-selective delay tube characterized by: The application relates to a short-delay or instantaneous fuse, which comprises a tube shell (1), an upper silk pad (2), a lower silk pad (3), a gasket (4), first ignition powder (8), second ignition powder (5), delay powder (7) and initiating explosive (6); the tube shell (1) is cylindrical, and the upper silk pad (2), the first ignition powder (8), the delay powder (7), the initiating explosive (6), the second ignition powder (5), the lower silk pad (3) and the gasket (4) are sequentially filled in the tube shell (1) from top to bottom; the top end and the bottom end of the tube shell (1) are both provided with a closed structure, which is used as a transmission hole after being closed; when the fuse is set as a short-delay mode, the top end of the tube shell (1) is used as an input end, and the bottom end is used as an output end; when the fuse is set as an instantaneous mode, the bottom end of the tube shell (1) is used as an input end, and the top end is used as an output end; the above two input modes are opposite to the explosion sequence of the delay tube charge, wherein the short-delay mode is realized by igniting the delay powder first, and the instantaneous mode is realized by igniting the delay powder later.

2. The dual axial flame input and output, flash / short delay-selective delay tube of claim 1, wherein: The flame generated by the fire cap, the ignition head, the ignition tube or the relay tube of the fuse firing mechanism is input into the delay tube from the top end, is transmitted to the first ignition powder (8) through the transmission hole of the tube shell (1), the first ignition powder (8) is ignited, the delay powder (7) is ignited, the initiating explosive (6) is exploded after the delay of the delay powder (7), the second ignition powder (5) is ignited, and the delay tube completes the flame output in the delay mode.

3. The dual axial flame input and output, flash / short delay-selective delay tube of claim 1, wherein: The flame generated by the fire cap, the ignition head, the ignition tube or the relay tube of the fuse firing mechanism is input into the delay tube from the bottom end, is transmitted to the second ignition powder (5) through the transmission hole of the tube shell (1), and the second ignition powder (5) is ignited, the initiating explosive (6) is exploded, the delay powder (7) and the first ignition powder (8) are exploded, and the delay tube completes the flame output in the instantaneous mode.

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