A sealed and limiting type pyrotechnic drive safety ignition mechanism

Abstract

A sealed, limit-type pyrotechnic-driven safety ignition mechanism belongs to the field of pyrotechnics technology. This invention uses an electrically igniting element to move a slider to disarm the safety mechanism, avoiding the complex motor and circuit structures of traditional electromechanical safety mechanisms. This significantly reduces the design difficulty of the safety ignition mechanism, enabling rapid design and avoiding the drawbacks of traditional electromechanical safety mechanisms, such as high process control difficulty, high cost, large installation space and weight, and poor environmental adaptability. Furthermore, it solves the problems of reliable switching between safety and operation, reliable maintenance of both states, optimized design to reduce components, lower product costs, and overall sealing in pyrotechnic-driven safety ignition mechanisms.

Description

Technical Field

[0001] This invention relates to a sealed and limiting type pyrotechnic drive safety ignition mechanism, belonging to the field of pyrotechnics technology. Background Technology

[0002] Currently, mechanical safety mechanisms are commonly used in the safety devices of solid rocket engines. These mechanisms primarily use motors to control the alignment and isolation of the internal detonation transmission channels, thereby providing safety control over pyrotechnics and preventing accidental ignition of the engine. Traditional mechanical safety mechanisms are characterized by complex structures, the need for control circuits to control the motors, difficulties in manufacturing processes, high costs, and large installation space and weight. Furthermore, under the current complex and harsh battlefield environment, the reliability of the motor switching and the maintenance of its state in both safe and operational states are easily affected by environmental conditions such as vibration and shock, and the circuit control system is also susceptible to the influence of the battlefield electromagnetic environment.

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

[0004] In response to this situation, pyrotechnic safety mechanisms are increasingly in demand due to their low cost and good environmental adaptability. However, there are currently few organizations developing pyrotechnic safety mechanisms, and there is still considerable room for improvement in areas such as ensuring reliable switching between safety and operational states, reliably maintaining both states, optimizing design to reduce components, lowering product costs, and ensuring overall airtightness to prevent interference with other components on the missile. Summary of the Invention

[0005] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a sealed and limited pyrotechnic-driven safety ignition mechanism, which solves the problems of reliable switching between safety and operation, reliable maintenance of safety and operation states, optimized design to reduce parts, reduced product cost, and overall sealing performance.

[0006] The technical solution of this invention is: a sealed and limiting type pyrotechnic-driven safety ignition mechanism, installed at the ignition top cover of the projectile; the ignition mechanism includes:

[0007] The casing has two internal ignition channels: an ignition channel and a safety release channel.

[0008] The first electric ignition element is installed inside the housing. One end is connected to the onboard control system, and the other end is connected to one end of the ignition channel inside the housing. The other end of the ignition channel contacts the slider, and the direction of the ignition channel is perpendicular to the direction of slider movement. The ignition channel is blocked in the safety state and opened in the working state.

[0009] The second electric ignition element is installed inside the housing, with one end connected to the missile control system and the other end connected to one end of the safety release channel inside the housing; the other end of the safety release channel contacts the slider, and the direction of the safety release channel is parallel to the direction of slider movement.

[0010] The slider, installed inside the housing, ignites under the control of the onboard control system after receiving an unlocking command. The resulting flame propels the slider to move within the housing. The slider is provided with a ignition hole and a positioning screw for limiting the slider when no unlocking command is received. The positioning screw is sheared off and released after the slider moves, and the ignition hole is connected to the ignition channel when the slider slides to the end of its stroke, 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 ignition transmission in the safety ignition mechanism, and the second electric ignition element is used to push the slider to move, changing the safety 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, it also includes a plug, which contacts the slider at the end of its sliding stroke within the housing, thus limiting the slider's movement to the working state.

[0013] Furthermore, it also includes a plug mounting screw, which is located at the connection between the plug and the housing and is used for the connection between the plug and the housing.

[0014] Furthermore, it also includes a spring plunger; the slider is provided with a sealing ring mounting groove, an ignition 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 pressing the slider to prevent the slider from moving in the safety state; when the ignition mechanism switches from the safety state to the working state, the slider slides in the safety release channel, and when it slides to the end point, the plunger on the spring plunger sinks into the working state positioning hole on the slider to perform a secondary limit on the slider when it moves to the working state;

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

[0016] Furthermore, it also includes an electric ignition element sealing ring; the electric ignition element sealing ring is located at the mounting position of the first electric ignition element and the second electric ignition element with the housing, 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 located at the front end and the rear end of the ignition hole, respectively, 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 connected to the ignition device for ignition output.

[0019] Furthermore, the housing is provided with a mounting hole located at the connection between the housing and the missile's ignition top cover, which is used to connect the pyrotechnic drive safety ignition mechanism to the missile's ignition top cover.

[0020] The advantages of this invention compared to the prior art are:

[0021] (1) The present invention uses an electric ignition element to drive the slider to release the safety mechanism, which avoids the complex motor and circuit structure of the traditional electromechanical safety mechanism. This significantly reduces the design difficulty of the safety ignition mechanism and enables the rapid design of the safety mechanism.

[0022] (2) This invention prevents the ignition gas from leaking from the safety mechanism by designing a tight sealing structure for each ignition channel, thus achieving a pollution-free design for the safety mechanism and preventing the ignition gas from affecting other equipment on the missile.

[0023] (3) By adopting an ignition nozzle and other installation structures, the present invention can directly install the safety mechanism on the ignition top cover, avoiding the need to design an installation bracket for the traditional safety mechanism, thereby reducing the installation space required on the projectile and reducing the installation weight, and has good product versatility and interface compatibility.

[0024] (4) This invention optimizes the design by simplifying parts, most of which are mechanically installed, and the processed parts have simple structure and low cost, with good production processability and low cost.

[0025] (5) The design of the limiting devices such as the working state positioning hole and the safety state positioning hole on the plug and the slider ensures that the safety and safety mechanism can be reliably limited in both the safety state and the working state. It has good adaptability to mechanical environment conditions and meets the current harsh battlefield mechanical environment conditions. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 External view of a sealed, limit-type pyrotechnic drive safety ignition mechanism;

[0028] Figure 2 Main view of the internal structure of a sealed and limited pyrotechnic-driven safety ignition mechanism under safety conditions;

[0029] Figure 3 Top view of the internal structure of a sealed and limited pyrotechnic safety ignition mechanism under safety conditions;

[0030] Figure 4 Main view of the internal structure of the sealed limit type pyrotechnic drive safety fuse ignition mechanism in the unlocked working state;

[0031] Figure 5 Top view of the internal structure of the sealed limit type pyrotechnic safety ignition mechanism in the released working state;

[0032] Figure 6 This is the outline drawing of the slider;

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

[0034] Figure 8 Diagram showing the route for releasing the insurance. Detailed Implementation

[0035] To better understand the above technical solutions, the technical solutions of the present invention will be described in detail below with reference to 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 solutions of the present invention, rather than limitations on the technical solutions 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 description, in conjunction with the accompanying drawings, provides a more detailed account of a sealed, limiting, pyrotechnic-driven safety ignition mechanism according to an embodiment of the present invention. Specific implementation methods may include: Figure 1 The ignition mechanism is installed at the ignition cap on the missile and includes:

[0037] The casing 1 has two internal ignition channels: an ignition channel 11 and a safety release channel 12. Figure 7 , Figure 8The first electric ignition element 2 is installed inside the housing 1, with one end connected to the projectile control system and the other end connected to one end of the 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 direction of movement of the slider 5. In the safety state, the ignition channel is blocked; in the working state, the ignition channel is opened. The second electric ignition element 3 is installed inside the housing 1, with one end connected to the projectile control system and the other end connected to one end of the 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 direction of movement of the slider 5. Figure 6 The slider 5 is installed inside the housing 1. After receiving the unlocking command, the second electric ignition element 3 is ignited under the control of the launcher control system. The flame generated pushes the slider 5 to move inside the housing 1. The slider 5 is provided with a flame transmission hole 52 and a positioning screw 9 for limiting the slider 5 when no unlocking command is received. The positioning screw 9 is sheared off and released after the slider 5 moves. When the slider 5 slides to the end of its stroke, the flame transmission hole 52 is connected to the ignition channel, so that the flame is transmitted to the engine ignition device when the electric ignition element 1 is ignited.

[0038] Furthermore, the first electric ignition element 2 is used for ignition transmission of the safety ignition mechanism, and the second electric ignition element 3 is used to push the slider 5 to move, changing the safety ignition mechanism from the safety 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 one possible implementation, a plug 6 is also included, whereby the slider 5 contacts the plug 6 at the end of its sliding stroke within the housing 1, thus limiting the slider 5's movement to the working state.

[0040] Optionally, it also includes a plug mounting screw 8, which is located at the connection between the plug 6 and the housing 1 and is used for the connection between the plug 6 and the housing 1.

[0041] In one possible implementation, a spring plunger 10 is also included; the slider 5 is provided with a sealing ring mounting groove 51, an ignition 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 pressing the slider 5 to prevent the slider 5 from moving in the safety state; when the ignition mechanism switches from the safety state to the working state, the slider 5 slides in the safety release channel 12, and when it slides to the end point, the plunger on the spring plunger 10 sinks into the working state positioning hole 53 on the slider 5 to perform a secondary limit on the slider 5 when it moves to the working state;

[0042] The positioning screw 9 connects the slider 5 to the housing 1 through the safety positioning hole 54, ensuring that the ignition mechanism is stable 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 mounting position of the first electric ignition element 2 and the second electric ignition element 3 with 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.

[0044] In one possible implementation, a slider sealing ring 5 is also included; the slider sealing ring 5 is located at the front end and the rear end of the ignition hole 52, respectively, and is used 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 connected to the ignition device for ignition output.

[0046] In one possible implementation, the housing 1 is provided with a mounting hole 14, which is located at the connection between the housing 1 and the missile ignition top cover, for connecting the pyrotechnic drive safety ignition mechanism to the missile ignition top cover.

[0047] In the solution provided by the embodiments of the present invention, a sealed and limiting type pyrotechnic-driven safety ignition mechanism is threadedly installed on the ignition top cover and connected to an external electric ignition element. The sealed and limiting type pyrotechnic-driven safety ignition mechanism is as follows: Figure 1 As shown.

[0048] The sealed and limited type pyrotechnic drive safety ignition mechanism consists 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 7, a plug mounting screw 8, a positioning screw 9, and a spring plunger 10. Figure 6 The slider 5 is provided with a sealing ring mounting groove 51, an ignition 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 limit type pyrotechnic drive safety 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 drive safety ignition mechanism remains in the safety state without changing.

[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 is accidentally ignited, the ignition energy will be prevented from being transmitted to the subsequent ignition channel, thereby achieving the function of explosion-proof ignition.

[0051] When the pyrotechnic drive safety ignition mechanism needs to switch from the safe state to the working state, the second electric ignition element used to release the safety ignites under the current supplied with the spring, such as... Figure 2 , 3 As shown, after the second electric ignition element 3 ignites, the flame pushes the slider to slide within the safety release channel 12. The positioning screw 9 breaks under gas pressure, and the slider 5 continues to slide. When the slider 5 collides with the plug, the spring plunger 10 will automatically drop, thus limiting the working state.

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

[0053] After the safety switch is activated, the system will issue an ignition command to ignite the rocket. At this time, the second electric ignition element (3) ignites under the onboard current, and the flame is transmitted to the subsequent engine ignition device through the ignition channel (11), igniting the ignition device, which then further ignites the subsequent solid rocket engine.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

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

[0056] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A sealed and limiting type pyrotechnic-driven safety ignition mechanism, characterized in that, Installed at the ignition cap on the missile; the ignition mechanism includes: The casing (1) has two fire transmission channels inside, namely the ignition channel (11) and the safety release channel (12). The first electric ignition element (2) is installed inside the housing (1). One end is connected to the missile control system, and the other end is connected to one end of the 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 direction of movement of the slider (5). The ignition channel is blocked in the safety state and opened in the working state. The second electric ignition element (3) is installed inside the housing (1), with one end connected to the missile control system and the other end connected to one end of the 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 direction of movement of the slider (5); The slider (5) is installed inside the housing (1). After receiving the unlocking command, the second electric ignition element (3) is ignited under the control of the onboard control system. The generated flame pushes the slider (5) to move inside the housing (1). The slider (5) is provided with a flame transmission hole (52) and a positioning screw (9) for limiting the slider (5) when no unlocking command is received. The positioning screw (9) is sheared off and released after the slider (5) moves. When the slider (5) slides to the end of its stroke, the flame transmission hole (52) is connected to the ignition channel, so that the flame is transmitted to the engine ignition device when the first electric ignition element (2) is ignited. The first electric ignition element (2) is used for the ignition of the safety ignition mechanism, and the second electric ignition element (3) is used to push the slider (5) to move, so that the safety ignition mechanism changes from the safety 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. It also includes a plug (7), when the slider (5) reaches the end of its sliding stroke in the housing (1), the slider (5) contacts the plug (7) to limit the slider (5) when it moves to the working state; It also includes a spring plunger (10); the slider (5) is provided with a sealing ring mounting groove (51), an ignition 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 the state of pressing 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 it slides to the end point, the plunger on the spring plunger (10) sinks into the working state positioning hole (53) on the slider (5) 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 positioning hole (54) to ensure that the ignition mechanism is stable in the safety state.

2. The sealed and limiting type pyrotechnic drive safety ignition mechanism according to claim 1, characterized in that, It also includes a plug mounting screw (8), which is located at the connection between the plug (7) and the housing (1) and is used for the connection between the plug (7) and the housing (1).

3. The sealed and limiting type pyrotechnic drive safety 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 mounting 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).

4. The sealed and limiting type pyrotechnic drive safety ignition mechanism according to claim 1, characterized in that, It also includes a slider sealing ring (6); the slider sealing ring (6) is located at the front end of the ignition hole (52) and the rear end of the ignition hole (52) respectively, and is used to seal the gas in the ignition channel (11) and the safety release channel (12).

5. A sealed and limiting type pyrotechnic drive safety 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 connected to the ignition device for ignition output.

6. A sealed and limiting type pyrotechnic drive safety ignition mechanism according to claim 1, characterized in that, The housing (1) is provided with a mounting hole (14), which is located at the connection between the housing (1) and the missile ignition top cover, and is used to connect the pyrotechnic drive safety ignition mechanism to the missile ignition top cover.

Images