Sealing limiting type firer driving safety insurance ignition mechanism

Abstract

The invention discloses a sealing limiting type initiating explosive driving safety insurance ignition mechanism, and belongs to the technical field of initiating explosive devices. According to the safety mechanism, the safety mechanism is released in the mode that the electric ignition element pushes the sliding block to move, the mode that a traditional electromechanical safety mechanism releases safety through a complex motor structure and a complex circuit structure is avoided, and the design difficulty of the safety ignition mechanism is remarkably reduced; therefore, the quick design of the safety mechanism can be realized, and the traditional electromechanical safety mechanism with the defects of high process control difficulty, high cost, large installation space, large weight and poor environmental adaptability is avoided; and the problems of reliable conversion between insurance and working of the firer-driven safety insurance ignition mechanism, reliable maintenance of insurance and working states, optimization design, reduction of parts, reduction of product cost and overall sealing performance are solved.

Description

Technical Field

[0001] The invention relates to a sealed limited-position pyrotechnic driven safety insurance ignition mechanism, belonging to the technical field of pyrotechnic products. Background Art

[0002] At present, mechanical safety insurance mechanisms are widely used in the safety insurance devices of solid rocket engines. The mechanical safety insurance mechanisms mainly control the alignment and isolation of the internal explosion transmission channel through motors, thereby playing a role in the safety control of pyrotechnics and preventing the accidental ignition of pyrotechnics and the accidental ignition of the engine. The traditional mechanical safety insurance mechanism has the characteristics of complex structure, the need for control circuits to control the motor, the difficulty of production process control, high cost, large installation space and weight; in addition, under the current complex and harsh battlefield environment conditions, the reliability of the motor conversion and the state maintenance in the insurance and working states of the traditional mechanical safety mechanism is easily affected by environmental conditions such as vibration and impact, and the circuit control system is also easily affected by the battlefield electromagnetic environment.

[0003] Therefore, under the current low-cost engine design and the requirements for meeting the harsh battlefield environment, traditional mechanical safety insurance mechanisms are increasingly unable to meet the requirements of overall engine design and production.

[0004] In view of this situation, the pyrotechnic driven safety insurance mechanism is increasingly in demand due to its low cost and good environmental adaptability. However, there are few units currently developing pyrotechnic driven safety insurance mechanisms. There is still a lot of room for improvement in terms of how to ensure the reliable conversion between safety and work, the reliable maintenance of safety and working states, the optimization of design to reduce parts, the reduction of product costs, and the overall airtightness to prevent the impact on other parts on the bomb. Summary of the invention

[0005] The technical problem solved by the present invention is: to overcome the shortcomings of the prior art and provide a sealed and limited pyrotechnic-driven safety insurance ignition mechanism, which solves the problems of reliable conversion between insurance and work, reliable maintenance of insurance and working states, optimized design to reduce parts, reduce product costs and overall sealing of the pyrotechnic-driven safety insurance ignition mechanism.

[0006] The technical solution of the present invention is: a sealed limited pyrotechnic driven safety insurance ignition mechanism, which is installed on the ignition top cover of the bomb; the ignition mechanism includes:

[0007] The shell has two fire transmission channels inside, namely the ignition channel and the safety release channel;

[0008] The first electric ignition element is installed in the shell, one end of which is connected to the control system on the bullet, and the other end is connected to one end of the ignition channel inside the shell, the other end of the ignition channel contacts the slider, and the direction of the ignition channel is perpendicular to the moving direction of the slider, and the ignition channel is blocked in the safety state, and the ignition channel is opened in the working state;

[0009] The second electric ignition element is installed in the shell, one end of which is connected to the control system on the bullet, and the other end is connected to one end of the safety release channel inside the shell; the other end of the safety release channel contacts the slider, and the direction of the safety release channel is parallel to the moving direction of the slider;

[0010] The slider is installed in the shell. After receiving the unlocking command, the second electric ignition element ignites under the control of the on-board control system, and the generated flame pushes the slider to move in the shell. The slider is provided with a fire transmission hole and a positioning screw for limiting the slider when the unlocking command is not received. The positioning screw is sheared off and the limit is released after the slider moves, and the slider slides to the end of the stroke to connect the fire transmission hole with the ignition channel, so that the flame is transmitted to the engine ignition device when the electric ignition element ignites.

[0011] Furthermore, the first electric ignition element is used for transmitting the fire of the safety insurance ignition mechanism, and the second electric ignition element is used for pushing the slider to move, so as to change the safety insurance ignition mechanism from the safety state to the working state. Each ignition mechanism is equipped with two first electric ignition elements and two second electric ignition elements to ensure dual-path redundancy of ignition.

[0012] Furthermore, a blocking cover is included. When the slider reaches the end of its sliding stroke in the shell, the slider contacts the blocking cover to limit the slider when it moves to the working state.

[0013] Furthermore, it also includes a plugging cover mounting screw, which is located at the connecting portion between the plugging cover and the shell and is used for connecting the plugging cover and the shell.

[0014] Furthermore, it also includes a spring plunger; the slider is provided with a sealing ring installation groove, a fire transmission hole, a working state positioning hole, and a safety state positioning hole; when the ignition mechanism is in the safety state, the plunger on the spring plunger is in a state of squeezing the slider to prevent the slider from moving in the safety state; when the ignition mechanism is switched from the safety state to the working state, the slider slides in the safety release channel, and when sliding to the end point, the plunger on the spring plunger sinks into the working state positioning hole on the slider, which is used for secondary limiting when the slider moves to the working state;

[0015] The positioning screw connects the slider to the housing through the safety state positioning hole to ensure that the ignition mechanism is stably in the safety state.

[0016] Furthermore, it also includes an electric ignition element sealing ring; the electric ignition element sealing ring is located at the installation position of the first electric ignition element and the second electric ignition element and the shell, and is used to seal the gas generated by the first electric ignition element and the second electric ignition element.

[0017] Furthermore, it also includes a slider sealing ring; the slider sealing ring is respectively located at the front end and the rear end of the fire transfer hole, and is used to seal the gas in the ignition channel and the safety release channel.

[0018] Furthermore, the housing is provided with an ignition nozzle, which is located at the output end of the ignition channel and is connected to the ignition device for ignition output.

[0019] Furthermore, the shell is provided with a mounting hole, which is located at the connection position between the shell and the ignition top cover on the bullet, and is used to connect the pyrotechnic-driven safety insurance ignition mechanism with the ignition top cover on the bullet.

[0020] The advantages of the present invention compared with the prior art are:

[0021] (1) The present invention uses an electric ignition element to push the slider to move to release the safety mechanism, thereby avoiding the traditional electromechanical safety mechanism that uses a complex motor structure and circuit structure to release the safety mechanism, significantly reducing the design difficulty of the safety ignition mechanism, thereby enabling the rapid design of the safety mechanism;

[0022] (2) The present invention prevents leakage of ignition gas from the safety mechanism by designing a strict sealing structure for each fire transmission channel, thereby achieving a pollution-free design of the safety mechanism, thereby reducing the impact of ignition gas on other equipment on the missile.

[0023] (3) The present invention adopts an ignition nozzle and other mounting structures to directly install the safety mechanism on the ignition top cover, avoiding the need to design a mounting bracket for the traditional safety mechanism, thereby reducing the installation space required on the bomb and the installation weight, and has good product versatility and interface matching.

[0024] (4) The present invention simplifies the parts and optimizes the design. Most of the parts are mechanically installed, and the processed parts have a simple structure and low cost, and have good production processability and low cost.

[0025] (5) The design of the limiting devices such as the working state positioning holes and the safety state positioning holes on the set screws, spring plungers, plug covers and sliders ensures that the safety mechanism can be reliably limited in both the safety state and the working state. It has good adaptability to mechanical environmental conditions and meets the current harsh battlefield mechanical environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 It is the appearance diagram of the sealed limited pyrotechnic driven safety insurance ignition mechanism;

[0028] Figure 2 It is a front view of the internal structure of the sealed limited pyrotechnic driven safety insurance ignition mechanism in the insurance state;

[0029] Figure 3 It is a top view of the internal structure of the sealed limited pyrotechnic driven safety insurance ignition mechanism in the insurance state;

[0030] Figure 4 The front view of the internal structure of the sealed limited pyrotechnic driven safety insurance ignition mechanism in the released safety working state;

[0031] Figure 5 A top view of the internal structure of the sealed limited pyrotechnic driven safety insurance ignition mechanism in the released safety working state;

[0032] Figure 6 is the appearance diagram of the slider;

[0033] Figure 7 This is a schematic diagram of the ignition channel;

[0034] Figure 8 This is a schematic diagram of the safety release channel. DETAILED DESCRIPTION

[0035] In order to better understand the above technical scheme, the technical scheme of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical scheme of the present invention, rather than limitations on the technical scheme of the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0036] The following is a further detailed description of a sealed limited pyrotechnic driven safety insurance ignition mechanism provided by an embodiment of the present invention in conjunction with the accompanying drawings of the specification. The specific implementation method may include: Figure 1 The ignition mechanism is installed on the ignition top cover of the missile, including:

[0037] The housing 1 has two fire transmission channels, namely, a firing channel 11 and a safety release channel 12. Figure 7 , Figure 8; A first electric ignition element 2 is installed in the shell 1, one end of which is connected to the control system on the bullet, and the other end is connected to one end of the ignition channel inside the shell 1, the other end of the ignition channel contacts the slider 5, and the direction of the ignition channel is perpendicular to the moving direction of the slider 5, and the ignition channel is blocked in the insurance state, and the ignition channel is opened in the working state; a second electric ignition element 3 is installed in the shell 1, one end of which is connected to the control system on the bullet, and the other end is connected to one end of the safety release channel inside the shell 1; the other end of the safety release channel contacts the slider 5, and the direction of the safety release channel is parallel to the moving direction of the slider 5; as Figure 6 The slider 5 is installed in the housing 1. After receiving the unlocking command, the second electric ignition element 3 ignites under the control of the control system on the bullet, and the generated flame pushes the slider 5 to move in the housing 1; the slider 5 is provided with a fire transmission hole 52 and a positioning screw 9 for limiting the slider 5 when the unlocking command is not received. The positioning screw 9 is sheared off and the limit is released after the slider 5 moves, and the slider 5 slides to the end of the stroke to connect the fire transmission hole 52 with the ignition channel, so that the flame is transmitted to the engine ignition device when the electric ignition element 1 ignites.

[0038] Furthermore, the first electric ignition element 2 is used for transmitting the fire of the safety insurance ignition mechanism, and the second electric ignition element 3 is used to push the slider 5 to move, so as to change the safety insurance ignition mechanism from the insurance state to the working state. Each ignition mechanism is equipped with two first electric ignition elements 2 and two second electric ignition elements 3 to ensure dual-path redundancy of ignition.

[0039] In a possible implementation, a blocking cover 6 is further included. When the slider 5 reaches the end of its sliding stroke in the housing 1, the slider 5 contacts the blocking cover 6 to limit the slider 5 when it moves to the working state.

[0040] Optionally, a plugging cover mounting screw 8 is also included. The plugging cover mounting screw 8 is located at the connecting portion between the plugging cover 6 and the shell 1 and is used for connecting the plugging cover 6 and the shell 1 .

[0041] In a possible implementation, it also includes a spring plunger 10; the slider 5 is provided with a sealing ring installation groove 51, a fire transmission hole 52, a working state positioning hole 53, and a safety state positioning hole 54; when the ignition mechanism is in the safety state, the plunger on the spring plunger 10 is in a state of squeezing the slider 5 to prevent the slider 5 from moving in the safety state; when the ignition mechanism is switched from the safety state to the working state, the slider 5 slides in the safety release channel 12, and when sliding to the end point, the plunger on the spring plunger 10 sinks into the working state positioning hole 53 on the slider 5, which is used for secondary limiting when the slider 5 moves to the working state;

[0042] The positioning screw 9 connects the slider 5 to the housing 1 through the safety state positioning hole 54 to ensure that the ignition mechanism is stably in the safety state.

[0043] Furthermore, it also includes an ignition tube sealing ring 4; the ignition tube sealing ring 4 is located at the installation position of the first electric ignition element 2 and the second electric ignition element 3 and the shell 1, and is used to seal the gas generated by the first electric ignition element 2 and the second electric ignition element 3.

[0044] In a possible implementation, a slider sealing ring 5 is further included; the slider sealing ring 5 is respectively located at the front end and the rear end of the fire transfer hole 52 to seal the gas in the ignition channel 11 and the safety release channel 12.

[0045] Furthermore, the housing 1 is provided with an ignition nozzle 13, which is located at the output end of the ignition channel 11 and is connected to an ignition device for ignition output.

[0046] In one possible implementation, the shell 1 is provided with a mounting hole 14, which is located at the connection portion between the shell 1 and the ignition top cover on the bullet, and is used to connect the pyrotechnic-driven safety fuse ignition mechanism with the ignition top cover on the bullet.

[0047] In the solution provided in the embodiment of the present invention, a sealed position-limited pyrotechnic driven safety insurance ignition mechanism is installed on the ignition top cover through threads and is connected to an external electric ignition element. Figure 1 shown.

[0048] The sealed limited pyrotechnic driven safety insurance ignition mechanism is composed of a housing 1, a first electric ignition element 2, a second electric ignition element 3, an ignition tube sealing ring 4, a slider 5, a slider sealing ring 6, a plug cover 7, a plug cover mounting screw 8, a positioning screw 9, and a spring plunger 10. Figure 6 The slider 5 is provided with a sealing ring installation groove 51, a fire transmission hole 52, a working state positioning hole 53, and a safety state positioning hole 54. The housing 1 is provided with an ignition channel 11, an ignition nozzle 12, a safety release channel 13, and a mounting hole 14.

[0049] When the sealed limited pyrotechnic driven safety insurance ignition mechanism is in the safety state, the positioning screw 9 is screwed into the slider 5 to limit the safety state and ensure that the pyrotechnic driven safety insurance ignition mechanism remains in the safety state without changing its state.

[0050] The first electric ignition element 2 and the second electric ignition element 3 are installed on the housing 1. At this time, the ignition channel is blocked by the slider 5, so that the ignition channel is in an explosion-proof state. In this state, even if the ignition tube accidentally ignites, the ignition energy will be prevented from being transmitted to the subsequent fire transmission channel, thereby achieving the effect of explosion-proof ignition.

[0051] When the pyrotechnics drive the safety fuse ignition mechanism to switch from the safety state to the working state, the second electric ignition element used to release the safety will ignite under the current on the spring, such as Figure 2 , 3 As shown, after the second electric ignition element 3 ignites, the flame pushes the slider to slide in the safety release channel 12, in which the positioning screw 9 breaks under the gas pressure, and the slider 5 continues to slide. When the slider 5 collides with the blocking cover, the spring plunger 10 will automatically fall off, thereby limiting the working state.

[0052] At this time, the pyrotechnic driven safety insurance ignition mechanism is in working condition. Figure 4 , 5 At this time, the ignition hole of the slider is aligned with the ignition channel (11).

[0053] After the fuse is switched to the working state, the system will issue an ignition command to ignite. At this time, the second electric ignition element (3) ignites under the current on the missile, and the flame is transmitted to the subsequent engine ignition device through the ignition channel (11), igniting the ignition device, and the ignition device further ignites the subsequent solid rocket engine.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0056] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A sealed limited pyrotechnic driven safety insurance ignition mechanism, characterized in that: Installed on the ignition top cover of the missile; the ignition mechanism includes: The housing (1) is provided with two fire transmission channels, namely a firing channel (11) and a safety release channel (12); A first electric ignition element (2) is installed in the housing (1), one end of which is connected to the control system on the bullet, and the other end of which is connected to one end of an ignition channel inside the housing (1), the other end of the ignition channel contacts the slider (5), and the direction of the ignition channel is perpendicular to the moving direction of the slider (5), and the ignition channel is blocked in the safety state and opened in the working state; A second electric ignition element (3) is installed in the housing (1), one end of which is connected to the spring-loaded control system, and the other end of which is connected to one end of a safety release channel inside the housing (1); the other end of the safety release channel contacts the slider (5), and the direction of the safety release channel is parallel to the moving direction of the slider (5); The slider (5) is installed in the housing (1). After receiving the unlocking instruction, the second electric ignition element (3) ignites under the control of the on-board control system, and the generated flame pushes the slider (5) to move in the housing (1). The slider (5) is provided with a flame transmission hole (52) and a positioning screw (9) for limiting the position of the slider (5) when the unlocking instruction is not received. The positioning screw (9) is sheared off and the limit is released after the slider (5) moves. When the slider (5) slides to the end of the stroke, the flame transmission hole (52) is connected with the ignition channel, so that the flame is transmitted to the engine ignition device when the electric ignition element (1) ignites.

2. A sealed limited pyrotechnic driven safety insurance ignition mechanism according to claim 1, characterized in that: The first electric ignition element (2) is used for transmitting the ignition of the safety insurance ignition mechanism, and the second electric ignition element (3) is used for pushing the slider (5) to move, so as to change the safety insurance ignition mechanism from a safety state to a working state. Each ignition mechanism is equipped with two first electric ignition elements (2) and two second electric ignition elements (3), respectively, to ensure dual-path redundancy of ignition.

3. A sealed limited pyrotechnic driven safety insurance ignition mechanism according to claim 1, characterized in that: It also comprises a blocking cover (6), and when the slider (5) reaches the end of its sliding stroke in the housing (1), the slider (5) contacts the blocking cover (6), thereby limiting the position of the slider (5) when it moves to a working state.

4. A sealed limited pyrotechnic driven safety insurance ignition mechanism according to claim 3, characterized in that: It also comprises a plugging cover mounting screw (8), which is located at the connection position between the plugging cover (6) and the housing (1) and is used for connecting the plugging cover (6) and the housing (1).

5. The sealed limited pyrotechnic driven safety insurance ignition mechanism according to claim 1 is characterized in that: It also includes a spring plunger (10); the slider (5) is provided with a sealing ring installation groove (51), a fire transmission hole (52), a working state positioning hole (53), and a safety state positioning hole (54); when the ignition mechanism is in the safety state, the plunger on the spring plunger (10) is in a state of squeezing the slider (5) to prevent the slider (5) from moving in the safety state; when the ignition mechanism is switched from the safety state to the working state, the slider (5) slides in the safety release channel (12), and when sliding to the end point, the plunger on the spring plunger (10) sinks into the working state positioning hole (53) on the slider (5), so as to perform secondary limiting when the slider (5) moves to the working state; The positioning screw (9) connects the slider (5) to the housing (1) through the safety state positioning hole (54), thereby ensuring that the ignition mechanism is stably in the safety state.

6. A sealed limited pyrotechnic driven safety insurance ignition mechanism according to claim 1, characterized in that: It also includes an ignition tube sealing ring (4); the ignition tube sealing ring (4) is located at the installation position of the first electric ignition element (2) and the second electric ignition element (3) and the housing (1), and is used to seal the gas generated by the first electric ignition element (2) and the second electric ignition element (3).

7. A sealed limited pyrotechnic driven safety insurance ignition mechanism according to claim 1, characterized in that: It also includes a slider sealing ring (5); the slider sealing ring (5) is respectively located at the front end of the fire transmission hole (52) and the rear end of the fire transmission hole (52), and is used to seal the gas in the ignition channel (11) and the safety release channel (12).

8. A sealed limited pyrotechnic driven safety insurance ignition mechanism according to claim 1, characterized in that: The housing (1) is provided with an ignition nozzle (13), which is located at the output end of the ignition channel (11) and is connected to an ignition device for ignition output.

9. A sealed limited pyrotechnic driven safety insurance ignition mechanism according to claim 1, characterized in that: The shell (1) is provided with a mounting hole (14), which is located at the connection position between the shell (1) and the ignition top cover on the bullet, and is used to connect the pyrotechnic driven safety fuse ignition mechanism with the ignition top cover on the bullet.

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