Single-stroke recoverable fuse isolation device

Abstract

The invention discloses a fuze isolation device with a recoverable single stroke. The fuze isolation device comprises an explosion-proof body, a base and a rotor arranged between the explosion-proof body and the base, a safety pin in the explosion-proof body is used for initially positioning the rotor, so that a primary initiating explosive device in the explosion-proof body is separated from a grain I in the base; after the safety pin relieves the limiting of the rotor, the rotor rotates once, so that the primary initiating explosive device in the explosion-proof body is conducted with the grain I in the base; and when the separation needs to be recovered again, the electric actuator on the base releases the limitation on the rotor, and the primary initiating explosive device in the explosion-proof body and the first grain in the base are separated again after the rotor rotates in the same direction twice. The fuse isolation device can realize re-isolation after the isolation device is conducted, meets the use requirements of a rocket projectile under complex working conditions, adopts a single-stroke design, and is simple in structure and high in reliability.

Description

Technical Field

[0001] The invention relates to the technical field of fuze isolation devices, in particular to a single-stroke recoverable fuze isolation device. Background Art

[0002] The working principle of the isolation device is as follows: 1. During the transportation, service and rocket launch stages, the isolation device is mechanically locked by the safety device in the fuze, so that it is in an isolated state. At this time, the isolation device is used to isolate the transfer of detonation energy between the primary pyrotechnics and the secondary pyrotechnics of the fuze. Even if the primary pyrotechnics of the fuze are accidentally activated during the transportation, service and rocket launch stages, the isolation device can still prevent the primary pyrotechnics from transferring detonation energy to the next level of pyrotechnics. Therefore, the isolation device prevents the rocket from being detonated due to the accidental action of the primary pyrotechnics during the transportation, service and rocket launch stages, so that the system is in a safe state. 2. When the rocket is in the ready-to-fire state, the safety device in the fuze will unlock the isolation device and put the isolation device in a conducting state. At this time, the primary pyrotechnics in the fuze can transfer detonation energy to the next level of pyrotechnics. When the environment in which the rocket is located reaches the preset detonation conditions, the fuze will detonate the primary pyrotechnics and transfer detonation energy to the next level. Therefore, the isolation device is the "switch" that controls the energy flow between the primary pyrotechnic device and the subsequent pyrotechnic device in the fuze.

[0003] The current isolation device can only be switched from the isolation state to the conduction state. However, in the face of complex battlefield environments, rockets may encounter various unexpected situations due to the influence of different conditions and combat missions. For example: 1. During the transportation or service stage before the rocket is launched, the safety mechanism of the isolation device is accidentally released, leaving the isolation device of the fuze in the conduction state; 2. After the rocket is launched, there may be a misfire. At this time, if the pyrotechnics of the fuze are in the alignment state, the recovery safety of the rocket will be reduced; 3. When the rocket is launched and the isolation device is in the conduction state, the fuze is required not to detonate due to the change of combat mission. At this time, the system will require the isolation device of the fuze to be able to reliably switch from the conduction state to the isolation state so that the fuze and rocket are in a safe state. Summary of the invention

[0004] In response to the above technical problems, the present invention proposes a single-stroke recoverable fuze isolation device, which can achieve re-isolation after the isolation device is turned on, meeting the use requirements of complex working conditions of rockets. It adopts a single-stroke design, has a simple structure and strong reliability.

[0005] A single-stroke recoverable fuze isolation device comprises a flameproof body, a base and a rotor arranged between the flameproof body and the base;

[0006] The safety pin in the flameproof body initially positions the rotor, thereby isolating the primary pyrotechnics in the flameproof body from the explosive column in the base;

[0007] After the safety pin releases the limit on the rotor, the rotor rotates once to achieve conduction between the primary pyrotechnics in the flameproof body and the explosive column in the base;

[0008] When the isolation needs to be restored again, the electric actuator on the base releases the limit on the rotor, and the rotor is rotated in the same direction twice to achieve the isolation of the primary pyrotechnics in the explosion-proof body and the explosive column in the base.

[0009] As a preferred embodiment of the above technical solution, the rotor includes a rotor body, one side of the rotor body is provided with a slot cooperating with the safety pin, a torsion spring shaft is coaxially provided in the rotor body, the head and tail ends of the torsion spring shaft are respectively fixedly connected to the explosion-proof body and the base, the torsion spring on the torsion spring shaft applies a rotational thrust to the rotor body, and the rotor body is also provided with an elastic telescopic component one parallel to its axis to limit it, the base is provided with a positioning hole one and a positioning hole two for respectively cooperating with the elastic telescopic component one after the rotor body rotates twice, when the elastic telescopic component one is limited to the positioning hole one, the primary pyrotechnics in the explosion-proof body, the explosive column two in the rotor body and the explosive column one in the base are located on the same axis and are connected through and through.

[0010] As a preferred embodiment of the above technical solution, an elastic telescopic component 2 is provided on the base and located in the positioning hole 1.

[0011] As a preferred embodiment of the above technical solution, the elastic telescopic component one and the elastic telescopic component two both include a compression spring, one end of the compression spring abuts against a pin, and the other end is limited by a screw plug fixed to the rotor body or the base.

[0012] As a preferred embodiment of the above technical solution, the pin shaft of the elastic telescopic component 2 is limited by the cooperation of the electric actuator and the steel ball.

[0013] As a preferred embodiment of the above technical solution, the end of the pin of the elastic telescopic component 1 is hemispherical.

[0014] As a preferred embodiment of the above technical solution, the end of the pin of the second elastic telescopic component is a flat head.

[0015] As a preferred embodiment of the above technical solution, a bearing is provided between the torsion spring shaft and the rotor body.

[0016] The beneficial effects of the present invention are:

[0017] The technical problem that the current isolation device can only be switched from the isolation state to the conduction state but cannot be restored to the isolation state is solved. The isolation device can be re-isolated after being conducted, and the need for re-isolation after conduction of busy rockets in various unexpected situations is met, so that the fuze and rocket are in a safe state. The single-stroke design is adopted, the structure is simple, and the reliability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Exploded view of the present invention.

[0019] Figure 2 This is a schematic diagram of the rotor structure.

[0020] Figure 3 This is a schematic diagram of the structure of the fuze isolation device in the initial isolation state.

[0021] Figure 4 for Figure 3 Section view at AA in the middle.

[0022] Figure 5 This is a schematic diagram of the structure of the fuze isolation device when it is in the conducting state.

[0023] Figure 6 for Figure 5 Cross-sectional view at BB in the middle.

[0024] Figure 7 This is a schematic diagram of the structure of the fuze isolation device when it is in the conducting state again.

[0025] The accompanying drawings are marked as follows: 1-flameproof body, 2-base, 3-rotor, 4-safety pin, 5-primary pyrotechnics, 6-charge one, 7-electric actuator, 8-rotor body, 9-slot, 10-torsion spring shaft, 11-elastic telescopic component one, 12-positioning hole one, 13-positioning hole two, 14-charge two, 15-elastic telescopic component two, 16-compression spring, 17-pin shaft, 18-screw plug, 19-steel ball, 20-bearing. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 A single-stroke recoverable fuze isolation device shown comprises a flameproof body 1, a base 2 and a rotor 3 disposed between the flameproof body 1 and the base 2;

[0028] The safety pin 4 in the flameproof body 1 performs initial positioning on the rotor 3, thereby isolating the primary pyrotechnics 5 in the flameproof body 1 from the explosive column 6 in the base 2;

[0029] After the safety pin 4 releases the limit on the rotor 3, the rotor 3 rotates once, thereby realizing the conduction between the primary pyrotechnics 5 in the flameproof body 1 and the explosive column 6 in the base 2;

[0030] When the isolation needs to be restored again, the electric actuator 7 on the base 2 releases the limit on the rotor 3, and the rotor 3 realizes the isolation of the primary pyrotechnics 5 in the explosion-proof body 1 and the explosive column 6 in the base 2 after a second rotation in the same direction.

[0031] In this embodiment, the rotor 3 includes a rotor body 8, one side of the rotor body 8 is provided with a slot 9 that cooperates with the safety pin 4, a torsion spring shaft 10 is coaxially provided in the rotor body 8, the head and tail ends of the torsion spring shaft 10 are respectively fixedly connected to the flameproof body 1 and the base 2, the torsion spring on the torsion spring shaft 10 applies a rotational thrust to the rotor body 8, and the rotor body 8 is also provided with an elastic telescopic component 11 that limits the rotor body 8 in parallel with its axis. The base 2 is provided with a positioning hole 12 and a positioning hole 2 13 for respectively cooperating with the elastic telescopic component 11 after the rotor body 8 rotates twice. When the elastic telescopic component 11 is limited to the positioning hole 12, the primary pyrotechnics 5 in the flameproof body 1, the explosive column 2 14 in the rotor body 8 and the explosive column 6 in the base 2 are located on the same axis and are connected through, such as Figure 2 shown.

[0032] Specifically, the primary pyrotechnic device 5, the second charge 14 and the first charge 6 are arranged radially, the torsion spring shaft 10 is a conventional assembly of a torsion spring and a shaft, and the rotor body 8 is provided with a special-shaped hole for installing the torsion spring shaft 10.

[0033] In this embodiment, a second elastic telescopic component 15 is provided on the base 2 and located in the first positioning hole 12 .

[0034] In this embodiment, the elastic telescopic component 1 11 and the elastic telescopic component 2 15 both include a compression spring 16 , one end of the compression spring 16 abuts against a pin 17 , and the other end is limited by a screw plug 18 fixed to the rotor body 1 or the base 2 .

[0035] In this embodiment, the pin 17 of the elastic telescopic component 2 15 is limited by the electric actuator 7 and the steel ball 19. The combination of the electric actuator and the steel ball is used in the "Fuze Design Manual" and the currently finalized product models, so the structure has high reliability.

[0036] In this embodiment, the end of the pin 17 of the elastic telescopic component 11 is hemispherical.

[0037] In this embodiment, the end of the pin 17 of the second elastic telescopic component 15 is a flat end.

[0038] In this embodiment, a bearing 20 is disposed between the torsion spring shaft 10 and the rotor body 8 .

[0039] The working principle of this embodiment is as follows.

[0040] State 1 (Isolated State): Figure 3 , Figure 4 As shown, at this time, the rotor body 8 is locked in a disconnected state by the safety pin 4, the pin shaft 17 of the elastic telescopic component 15 is locked in a compressed state by the electric actuator 7 and the steel ball 19, and the primary pyrotechnic product 5 in the rotor body 8 and the explosive column 6 of the base 2 are isolated by the rotor body 8, and the primary pyrotechnic product 5 cannot transfer detonation energy to the explosive column 6.

[0041] State 2 (conduction state): Figure 5 , Figure 6 As shown, the safety pin 4 releases the lock on the rotor body 8, and the rotor body 8 rotates a certain angle under the action of the torsion spring on the torsion spring shaft 10, and the pin 17 of the elastic telescopic component 11 falls into the positioning hole 12 on the base 2, and the rotor body 8 cannot rotate again. At this time, the pin 17 of the elastic telescopic component 11 and the pin 17 of the elastic telescopic component 15 are in the same positioning hole 12. Figure 5 As shown in the BB cross-sectional view, at this time, the primary pyrotechnics 5 in the flameproof body 1, the second charge 14 in the rotor body 8 and the first charge 6 in the base 2 are in a aligned state, and the detonation energy can be transmitted to the next level. However, the torsion spring on the torsion spring shaft 10 in the rotor body 8 is still in a compressed state and can continue to rotate.

[0042] State 3 (Isolated again): Figure 7As shown, when the fuze needs to enter the isolation state again, the fuze activates the electric actuator 7 to release the constraint of the steel ball 19 on the pin 17 of the elastic telescopic component 2 15. After the pin 17 of the elastic telescopic component 2 15 is released, it will push against the pin 17 of the elastic telescopic component 1 11. Since the thrust of the compression spring 16 of the elastic telescopic component 2 15 is much greater than the thrust of the compression spring 16 of the elastic telescopic component 1 11, the pin 17 of the elastic telescopic component 1 11 can be re-pushed into the rotor body 8 to release the constraint on the rotor body 8. The rotor body 8 is again rotated around the torsion spring shaft 10 axially by the torsion spring rotation thrust on the torsion spring shaft 10. Finally, the pin 17 of the elastic telescopic component 1 11 falls into the positioning hole 2 13 again after it is in place, completing the re-locking of the rotor 1. At this time, the primary pyrotechnics 5 in the flameproof body 1 and the explosive column 1 6 in the base 2 are again isolated by the rotor body 8, and the primary pyrotechnics 5 cannot transmit the detonation energy to the explosive column 1 6.

[0043] The pin 17 of the elastic telescopic component 11 is designed as a semi-spherical ball, and the pin 17 of the elastic telescopic component 2 15 is designed as a flat head, and the upper and lower pins 17 are in point-to-surface contact. In addition, the torsion spring on the torsion spring shaft 10 in the rotor body 8 is in a pre-tightened state. Every time the pin 17 of the elastic telescopic component 11 is lifted a little, the rotor body 8 will rotate a certain angle, so this design also prevents the pin 17 of the elastic telescopic component 11 from falling into the positioning hole 12 again during the process of being lifted. In addition, the aperture of the pin 17 for accommodating the elastic telescopic component 2 15 is larger than the aperture of the pin 17 for accommodating the elastic telescopic component 11.

[0044] The present invention discloses a single-stroke recoverable fuse isolation device, which solves the problem that the existing isolation device cannot be switched from the on state to the off state. The present invention has the advantages of simple structure and wide versatility. Moreover, since the isolation rotor of the present invention is a single-stroke design without a complex reciprocating mechanism, the structure has high reliability.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A single-stroke recoverable fuze isolation device, characterized in that: It comprises a flameproof body, a base and a rotor arranged between the flameproof body and the base; The safety pin in the flameproof body initially positions the rotor, thereby isolating the primary pyrotechnics in the flameproof body from the explosive column in the base; After the safety pin releases the limit on the rotor, the rotor rotates once to achieve conduction between the primary pyrotechnics in the flameproof body and the explosive column in the base; When the isolation needs to be restored again, the electric actuator on the base releases the limit on the rotor, and the rotor is rotated in the same direction twice to achieve the isolation of the primary pyrotechnics in the explosion-proof body and the explosive column in the base.

2. A single-stroke recoverable fuze isolation device according to claim 1, characterized in that: The rotor includes a rotor body, one side of the rotor body is provided with a slot that cooperates with the safety pin, a torsion spring shaft is coaxially provided in the rotor body, the head and tail ends of the torsion spring shaft are respectively fixedly connected to the explosion-proof body and the base, the torsion spring on the torsion spring shaft applies a rotational thrust to the rotor body, and the rotor body is also provided with an elastic telescopic component one parallel to its axis to limit it, the base is provided with a positioning hole one and a positioning hole two for respectively cooperating with the elastic telescopic component one after the rotor body rotates twice, when the elastic telescopic component one is limited to the positioning hole one, the primary pyrotechnics in the explosion-proof body, the explosive column two in the rotor body and the explosive column one in the base are located on the same axis and are connected through and through.

3. A single-stroke recoverable fuze isolation device according to claim 2, characterized in that: An elastic telescopic component 2 is provided on the base and located in the positioning hole 1.

4. A single-stroke recoverable fuze isolation device according to claim 3, characterized in that: The elastic telescopic component 1 and the elastic telescopic component 2 both include a compression spring, one end of the compression spring abuts against a pin shaft, and the other end is limited by a screw plug fixed on the rotor body or the base.

5. A single-stroke recoverable fuze isolation device according to claim 4, characterized in that: The pin shaft of the second elastic telescopic component is limited by the cooperation of the electric actuator and the steel ball.

6. A single-stroke recoverable fuze isolation device according to claim 4, characterized in that: The end of the pin of the first elastic telescopic component is hemispherical.

7. A single-stroke recoverable fuze isolation device according to claim 4, characterized in that: The end of the pin of the second elastic telescopic component is a flat head.

8. A single-stroke recoverable fuze isolation device according to claim 2, characterized in that: A bearing is arranged between the torsion spring rotating shaft and the rotor body.

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