Valve control type ignition safety mechanism and working method thereof

Abstract

The invention discloses a valve control type ignition safety mechanism and a working method thereof, and belongs to the technical field of aerospace power device safety control, the valve control type ignition safety mechanism comprises a mounting seat, a shell, and a ball valve assembly, a gas chamber and a rotating assembly which are arranged in the shell; a fire insulation channel and an ignition channel which are not communicated with each other are arranged on a ball valve rotor, the ball valve rotor is connected with a rotating assembly, and the ball valve rotor is driven to rotate through the rotating assembly, so that the valve control type ignition safety mechanism is switched between a safety state and a working state, and an electric igniter is isolated from an explosion propagation assembly in the safety state; the electric igniter connector is communicated with the explosion propagation connector through the ignition channel and communicated with the gas chamber through the fire insulation channel, so that pressure relief is conducted on gas through the gas chamber during accidental ignition, isolation between the electric igniter and the explosion propagation assembly is achieved, the electric igniter connector is communicated with the explosion propagation connector through the ignition channel in the working state, and communication between the electric igniter and the explosion propagation assembly and isolation between the electric igniter and the gas chamber are achieved. And the mistaken ignition accident is fundamentally avoided.

Description

Technical Field

[0001] This invention belongs to the field of safety control technology for aerospace power plants, specifically relating to a valve-controlled ignition safety mechanism for rocket engines or other pyrotechnic devices and its operating method. Background Technology

[0002] The igniter is a commonly used ignition element in rocket engines, and its performance directly affects the engine's operational reliability. However, conventional igniters are typically highly sensitive and may ignite accidentally during storage, transportation, and the pre-launch standby phase due to factors such as environmental static electricity, external electromagnetic interference, or unexpected current in the test circuitry. Accidental ignition will directly ignite the main propellant, causing the rocket engine to operate under unintended conditions and potentially leading to a catastrophic accident.

[0003] To mitigate the aforementioned risks, installing safety mechanisms (commonly known as flame isolation mechanisms or safe detonation devices) in the ignition energy transmission channel has become a common technical approach in this field. Currently, most mainstream safety mechanisms employ mechanical isolation designs, such as slider-type or knob-type structures. Under safe conditions, these mechanisms physically isolate the electric igniter from the main charge, thereby cutting off the propagation path of ignition energy. When the ignition command is executed, this barrier is removed to reopen the channel and ensure the normal transmission of the flame sequence.

[0004] However, these mechanisms typically have some shortcomings: First, the reliability of state transitions is poor, and they may be incorrectly or improperly transitioned due to vibration or other reasons. Second, there is a lack of effective state feedback, making it difficult for ground personnel to accurately determine whether the mechanism is currently in a safe or working state. Third, the locking ability after transition is insufficient, and the mechanism may rebound to the safe position due to impact, vibration, or other reasons, leading to ignition failure. Fourth, the reliability of the fireproofing in the safe state needs to be improved. In some designs, when the electric igniter is accidentally ignited, the fireproofing structure may be damaged due to a sudden increase in internal pressure. At this time, the high-temperature and high-pressure gas can easily cause the entire structure to explode. Summary of the Invention

[0005] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a valve-controlled ignition safety mechanism and its working method, which can switch between safe state and working state by controlling the rotation of ball valve rotor, and has both high safety and high reliability.

[0006] To achieve the above objectives, one aspect of the present invention provides a valve-controlled ignition safety mechanism, which includes a mounting base, a housing, and a ball valve assembly, a gas chamber, and a rotating assembly disposed within the housing; One end of the outer casing is open, and the other end is provided with a detonation transmission interface; The mounting base is disposed on the opening side of the housing and is sealed to the housing; the housing is provided with an electric igniter interface for mounting an electric igniter. The ball valve assembly is disposed within the housing and includes a ball valve body and a ball valve rotor. The ball valve body has a cavity, and a first through hole and a second through hole communicating with the cavity are provided on the outer wall of the ball valve body. The first through hole communicates with the electric igniter interface, and the second through hole communicates with the explosion transmission interface. The ball valve rotor is matched and disposed within the cavity. The ball valve rotor is provided with a fireproof channel and an ignition channel that are not interconnected. One end of the fireproof channel and one end of the ignition channel are spaced apart circumferentially, and can sequentially communicate with the first through hole as the ball valve rotor rotates circumferentially. When one end of the fireproof channel is connected to the first through hole, the other end of the fireproof channel is connected to the gas chamber. When one end of the ignition channel is connected to the first through hole, the other end of the ignition channel is connected to the second through hole. The rotating assembly is connected to the ball valve rotor and is used to drive the ball valve rotor to rotate circumferentially.

[0007] As a further improvement of the present invention, it also includes a detonating charge, which is disposed between the ball valve body and the mounting base, with one end sealed and connected to the electric igniter interface and the other end sealed and connected to the first through hole.

[0008] As a further improvement of the present invention, the ball valve body is provided with a third through hole communicating with the cavity at one end near the air chamber, and a support shaft coaxial with the rotating assembly is provided in the third through hole. An axial through hole is provided in the support shaft, one end of the axial through hole is sealed and communicated with the other end of the fireproof channel, and the other end is sealed and communicated with the air chamber.

[0009] As a further improvement of the present invention, the rotating assembly includes a motor and a drive shaft; the motor is a DC servo motor with a power-off brake function, and the output shaft of the motor is coaxially connected to one end of the drive shaft; a keyway is provided at one end of the ball valve rotor near the motor, and the other end of the drive shaft is sealed and passes through the ball valve body, and is coaxially connected to the ball valve rotor through the keyway.

[0010] As a further improvement of the present invention, a status indication component is also included; the status indication component is disposed between the ball valve body and the rotating component, and includes a micro switch, a reed, and a trigger; the reed is fixedly disposed on the ball valve body, and the trigger is fixedly disposed at the output end of the rotating component to rotate with the ball valve rotor; when the ball valve rotor rotates to the point where the ignition channel communicates with the first through hole, the trigger presses the reed to close the micro switch and generate a working status electrical signal; when the ball valve rotor rotates to the point where the fireproof channel communicates with the first through hole, the trigger separates from the reed, the micro switch is opened, and a safety status electrical signal is generated.

[0011] As a further improvement of the present invention, the mounting base is also provided with an electric detonator, which is connected to the rotating component and the status indicator component to receive external control commands for the rotating component and output the status electrical signal of the status indicator component.

[0012] As a further improvement of the present invention, the first through hole and the second through hole are arranged opposite to each other on the ball valve body; the ignition channel is a straight channel and the fireproof channel is an L-shaped channel.

[0013] As a further improvement of the present invention, the mounting base is provided with two electric igniter interfaces, and a set of ball valve assembly and a rotating assembly are respectively provided in the housing corresponding to the two electric igniter interfaces, and the fireproof channel in the two sets of ball valve assemblies is simultaneously connected to the same gas chamber.

[0014] Another aspect of the present invention provides a method for operating a valve-regulated ignition safety mechanism, for use in the aforementioned valve-regulated ignition safety mechanism, comprising the following steps: (1) An electric igniter is installed in the electric igniter interface, and the detonation transmission interface is connected to the detonation transmission component; (2) In a safe state where ignition is not required, the rotating assembly drives the ball valve rotor to rotate until the fireproof channel communicates with the first through hole and the gas chamber; (3) When the valve-controlled ignition safety mechanism receives the ignition command, the rotating component drives the ball valve rotor to rotate until both ends of the ignition channel are connected to the first through hole and the second through hole respectively; (4) The electric igniter ignites the gas, which is then introduced into the explosion transmission component through the first through hole, the ignition channel and the second through hole in sequence, thereby igniting the explosion transmission component; (5) After the explosion transmission component is ignited, the valve-controlled ignition safety mechanism receives a locking command, and the rotating component drives the ball valve rotor to rotate to switch to the state of step (2).

[0015] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0016] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include: (1) The valve-controlled ignition safety mechanism of the present invention provides a fireproof channel and an ignition channel that are not connected to each other on the ball valve rotor and connects the ball valve rotor to the rotating assembly so that the rotating assembly drives the rotation of the ball valve rotor, thereby enabling the valve-controlled ignition safety mechanism to switch between a safe state and a working state, ensuring accurate and rapid state transition. In the safe state, the electric igniter is isolated from the detonation transmission assembly and connected to the gas chamber through the fireproof channel so that the gas pressure is released through the gas chamber in case of accidental ignition, thereby achieving isolation between the electric igniter and the detonation transmission assembly. In the working state, the electric igniter interface is isolated from the gas chamber and connected to the detonation transmission interface through the ignition channel, thereby achieving communication between the electric igniter and the detonation transmission assembly, fundamentally avoiding accidental ignition accidents.

[0017] (2) The valve-controlled ignition safety mechanism of the present invention sets the first through hole and the second through hole opposite each other and sets the ignition channel as a straight channel to ensure that the detonation channel is direct, the volume is small, the energy loss is small, and the detonation sequence is continuous and reliable when in operation; by setting two electric igniter interfaces on the mounting base and setting two sets of ball valve assemblies and rotating assemblies in the housing, two independent electric igniters are used to form a redundant setting, so that the other one can still work normally when one fails, which greatly improves the reliability of the entire ignition system.

[0018] (3) The valve-controlled ignition safety mechanism of the present invention has a reasonable structural design, reliable setting, and convenient operation. It integrates flame isolation, reliable ignition, state switching, locking and indication functions, which can effectively prevent accidental ignition of the engine when it is not working, significantly improve the safety and reliability of engine storage and operation, and has good application prospects and promotion value. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional structural diagram of the valve-controlled ignition safety mechanism under safe conditions according to an embodiment of the present invention; Figure 2 yes Figure 1 A magnified view of part A in the middle; Figure 3This is a cross-sectional structural schematic diagram of the valve-controlled ignition safety mechanism in the working state according to an embodiment of the present invention; Figure 4 yes Figure 3 A magnified view of part B in the middle section; Figure 5 This is a schematic diagram of the structure of the status indication component in a safe state according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the status indicator component in the working state in an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of the valve-controlled ignition safety mechanism in an embodiment of the present invention; Figure 8 This is a cross-sectional view of the internal structure of the valve-controlled ignition safety mechanism in an embodiment of the present invention.

[0021] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Mounting base; 101. Electric detonator; 102. Electric igniter interface; 2. Housing; 201. Detonation transmission interface; 3. Ball valve body; 301. First through hole; 302. Second through hole; 303. Third through hole; 4. Ball valve rotor; 401. Fireproof channel; 402. Ignition channel; 5. Detonation charge; 6. Gas chamber; 7. Motor; 8. Drive shaft; 9. Spring; 10. Support shaft; 1001. Axial through hole; 11. Trigger element. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0023] In the description of this invention, it should be understood that, unless otherwise expressly specified and limited, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] Furthermore, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] Example: Please see Figures 1-8 The valve-controlled ignition safety mechanism in a preferred embodiment of the present invention includes a mounting base 1, a housing 2, a ball valve assembly, a rotating assembly, and a gas chamber 6.

[0028] Specifically, such as Figure 1 As shown in the figure, in the preferred embodiment, the outer shell 2 is open at one end and provided with a detonation transmission interface 201 at the other end, so as to connect to the detonation transmission component (not shown in the figure) through the detonation transmission interface 201.

[0029] Furthermore, the mounting base 1 is located on the open side of the housing 2, and the mounting base 1 is connected to the housing 2 by screws and sealed by an O-ring to form a robust sealing body.

[0030] Meanwhile, a multi-core electric detonator 101 is integrated on the side of the mounting base 1 away from the outer casing 2, which is used to receive external control commands and output status indication signals; at the same time, an electric igniter interface 102 is also provided on the mounting base 1 for installing an electric igniter (not shown in the figure).

[0031] Further, in the preferred embodiment, the ball valve assembly includes a ball valve body 3 and a ball valve rotor 4; wherein the ball valve body 3 is fixed inside the housing 2, and a cavity is provided inside it, and a first through hole 301 and a second through hole 302 communicating with the cavity are provided at intervals on the side wall of the ball valve body 3; wherein the first through hole 301 is sealed and connected to the electric igniter interface 102, and the second through hole 302 is sealed and connected to the detonation transmission interface 201.

[0032] Preferably, a detonating charge 5 is provided between the ball valve body 3 and the mounting base 1. One end of the detonating charge 5 is sealed and connected to the electric igniter interface 102, and the other end is sealed and connected to the first through hole 301, thereby achieving a sealed connection between the first through hole 301 and the electric igniter interface 102.

[0033] Correspondingly, the ball valve rotor 4 is precisely fitted into the cavity of the ball valve body 3. Both are made of high-strength materials to ensure that they can maintain a seal under high pressure. The ball valve rotor 4 is also provided with a fireproof channel 401 and an ignition channel 402 that are not interconnected. One end of the fireproof channel 401 and one end of the ignition channel 402 are spaced apart along the circumference of the ball valve rotor 4, and one end of the fireproof channel 401 and one end of the ignition channel 402 can be connected to the first through hole 301 in sequence as the ball valve rotor 4 rotates circumferentially; when one end of the fireproof channel 401 is connected to the first through hole 301, the other end of the fireproof channel 401 is connected to the gas chamber 6; when one end of the ignition channel 402 is connected to the first through hole 301, the other end of the ignition channel 402 is connected to the second through hole 302.

[0034] In actual manufacturing, the ball valve rotor 4 and its internal fireproof channel 401 and ignition channel 402 are all formed by 3D printing. The outer spherical surface is 3D printed and then subjected to additional machining to improve the surface finish and reduce the frictional resistance during rotation.

[0035] Preferably, the fireproof channel 401 and the ignition channel 402 are arranged perpendicularly at 90° in the circumferential direction.

[0036] Preferably, such as Figure 2 and Figure 4 As shown, the fireproof channel 401 is an L-shaped channel, and the ignition channel 402 is a straight channel.

[0037] Furthermore, the air chamber 6 is connected to one side of the ball valve body 3 by screws. It is a relatively large sealed cavity, and a third through hole 303 communicating with the cavity is provided at one end of the ball valve body 3 near the air chamber 6. The third through hole 303 is connected with the air chamber 6.

[0038] Preferably, a support shaft 10 coaxial with the rotating assembly is fixedly installed in the third through hole 303. An axial through hole 1001 is provided inside the support shaft 10. One end of the axial through hole 1001 is sealed and connected to the gas chamber 6, and the other end is sealed and connected to the other end of the fireproof channel 401. The axial through hole 1001 is a stepped through hole, and its inner diameter at the end near the gas chamber 6 is larger than the inner diameter at the other end.

[0039] Furthermore, in the preferred embodiment, the rotating component is disposed inside the housing 2 and on the side of the ball valve assembly away from the gas chamber 6, and its output end is connected to the ball valve rotor 4 to drive the ball valve rotor 4 to rotate circumferentially; at the same time, the rotating component is connected to the electric detonator 101 to receive external control commands for the rotating component through the electric detonator 101.

[0040] Specifically, such as Figure 1 and Figure 3 As shown, the rotating assembly includes a motor 7 and a rotating shaft 8. The motor 7 is fixed to the ball valve body 3 by screws, and its output shaft is coaxially connected to one end of the transmission shaft 8 via a coupling. Meanwhile, a keyway is provided on the ball valve rotor 4, and the other end of the transmission shaft 8 is sealed and passes through the ball valve body 3 and is connected to the ball valve rotor 4 via the keyway. The motor 7 drives the ball valve rotor 4 to rotate circumferentially, and the circumferential rotation of the ball valve rotor 4 enables the flameproof channel 401 and the ignition channel 402 to be connected and switched with the first through hole 301, respectively.

[0041] Preferably, the motor 7 is a DC servo motor with a power-off brake self-locking function. When the power is off, it can automatically lock the output shaft to ensure that the ball valve rotor 4 will not rotate under non-command conditions, thereby achieving state locking. It has good anti-vibration and anti-shock performance and ensures the reliability of the ignition safety mechanism.

[0042] It is important to know that when the motor 7 drives the ball valve rotor 4 to rotate circumferentially until one end of the fireproof channel 401 is connected to the first through hole 301 and the other end is connected to the gas chamber 6, the ignition channel 402 is isolated from the first through hole 301 and the second through hole 302. At this time, the ignition safety mechanism is in a safe state, such as... Figure 1 and Figure 2 As shown, the ignition path in this state is: electric igniter—explosive charge 5—fireproof channel 401—support shaft 10—gas chamber 6. This path has a large free volume. If the electric igniter is accidentally ignited for any reason in this state, the high-temperature and high-pressure gas flow generated will be transported to the gas chamber 6 along the above ignition path and undergo adiabatic expansion. The gas pressure, temperature and shock wave intensity will decrease sharply to below the safety threshold, and will not be able to form enough energy to destroy the ball valve seal or detonate the explosive charge, thereby achieving safe isolation.

[0043] Correspondingly, when the motor 7 drives the ball valve rotor 4 to rotate circumferentially until one end of the ignition channel 402 is connected to the first through hole 301 and the other end is connected to the second through hole 302, one end of the fireproof channel 401 is isolated by the inner wall surface of the ball valve body 3, thereby isolating the electric igniter from the gas chamber 6, such as... Figure 3 and Figure 4 As shown, the ignition safety mechanism is in working condition at this time. The ignition path in this working condition is: electric igniter—detonating charge 5—ignition channel 402—detonating assembly. This path is continuous, direct and has a very small free volume, resulting in minimal energy loss. The high-temperature and high-pressure gas generated by the electric igniter can be efficiently and reliably delivered to the detonating assembly and ignited, generating a larger detonation wave output, which in turn ignites the engine charge.

[0044] It is understood that the valve-controlled ignition safety mechanism of the present invention achieves the switching between a safe state and a working state through the rotation of the ball valve rotor 4. During the switching, the rotation angle of the ball valve rotor 4 matches the circumferential angle between one end of the fireproof channel 401 and one end of the ignition channel 402. Figure 2 and Figure 4 As shown, in a preferred embodiment of the present invention, one end of the fireproof channel 401 and one end of the ignition channel 402 are perpendicularly arranged at a 90° angle in the circumferential direction. When it is necessary to switch from the safe state to the working state, the ball valve rotor 4 rotates 90° clockwise; correspondingly, when it is necessary to switch back from the working state to the safe state, the ball valve rotor 4 rotates 90° counterclockwise.

[0045] Preferably, the valve-controlled ignition safety mechanism of the present invention further includes a status indicator component for indicating the rotational position of the ball valve rotor 4.

[0046] Specifically, the status indication component is located between the ball valve body 3 and the motor 7, and includes a micro switch, a reed 9, and a trigger 11; wherein, the reed 9 is fixedly mounted on the ball valve body 3, and the trigger 11 is fixedly mounted on the output shaft or drive shaft of the motor 7, such as... Figure 5 As shown, the trigger 11 is a cam-mounted trigger 11, so that when the ball valve rotor 4 rotates to the working state, the trigger 11 also rotates and presses the spring 9, causing the micro switch to close and generating a working state electrical signal, such as... Figure 6 As shown in the diagram; correspondingly, when the ball valve rotor 4 rotates to the safe state, the trigger 11 also rotates and separates from the reed 9, causing the micro switch to open and generating a safe state electrical signal, such as... Figure 5 As shown in the image.

[0047] Preferably, the micro switch is electrically connected to the electric detonator 101 so that the status electrical signal generated by the micro switch is output through the electric detonator 101.

[0048] Preferably, the mounting base 1 is provided with two electric igniter interfaces 102, and corresponding to the two electric igniter interfaces 102 are two independently configured sets of explosive charge 5, ball valve assembly, rotation assembly and status indicator assembly, and the two sets of ball valve assemblies share a gas chamber 6, such as Figure 7 and Figure 8 As shown, a dual-channel redundancy structure is formed so that when one system fails, the other system can still work normally, which greatly improves the reliability of ignition.

[0049] Preferably, sealing elements are provided at the connection interfaces of the explosive charge 5, the support shaft 10, and the drive shaft 8, so as to achieve static and dynamic sealing through the sealing elements.

[0050] Furthermore, in another aspect, the present invention provides a method for operating the above-mentioned valve-controlled ignition safety mechanism, specifically comprising the following steps: (1) Install an electric igniter at the electric igniter interface 102 and connect the detonation transmission component to the detonation transmission interface 201.

[0051] (2) In the safe state where ignition is not required, the rotating component drives the ball valve rotor 4 to rotate until both ends of the fireproof channel 401 are connected to the first through hole 301 and the gas chamber 6 respectively, and the status indicator component outputs a "safe state" electrical signal.

[0052] (3) When the valve-controlled ignition safety mechanism receives the ignition command, the rotating component drives the ball valve rotor 4 to rotate until both ends of the ignition channel 402 are connected to the first through hole 301 and the second through hole 302 respectively; After receiving the ignition command, the system first supplies power to motor 7, releases the brake, and the driver rotates precisely 90°. The ball valve rotor then rotates to the new position. Figure 3 and Figure 4 As shown, the ignition channel 402 rotates to one end to align with the explosive charge 5, and the other end to align with the explosive charge assembly; at the same time, the solid wall of the ball valve body 3 isolates the entrance of the electric igniter to the gas chamber 6; the trigger 11 on the drive shaft 8 simultaneously presses down the spring 9, the micro switch closes, and outputs a "working status" confirmation signal.

[0053] (4) The electric igniter ignites the gas, which is then introduced into the detonation assembly through the first through hole 301, the ignition channel 402 and the second through hole 302, thereby igniting the detonation transmission assembly; The control system sends an ignition current to the designated electric igniter. The flame instantly passes through the explosive charge 5, the ball valve body 3, and the ignition channel 402 to ignite the explosive charge assembly, generating a larger detonation wave output and igniting the engine charge.

[0054] (5) After the detonation transmission component is ignited, the valve-controlled ignition safety mechanism receives a locking command and the rotating component drives the ball valve rotor 4 to rotate to switch to the state of step (2).

[0055] The valve-controlled ignition safety mechanism of the present invention has a reasonable structural design, reliable setup, and convenient operation. It integrates flame isolation, reliable ignition, state switching, locking, and indication functions, which can effectively prevent accidental ignition of the engine when it is not in operation, significantly improve the safety and reliability of engine storage and operation, and has good application prospects and promotion value.

[0056] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements 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 valve regulated ignition safety mechanism, characterized by, The utility model provides a kind of electric detonator, including mounting seat, shell and the ball valve assembly, air chamber and rotating assembly arranged in the shell; One end of the shell is open, and the other end is provided with a booster interface; The mounting seat is arranged on the open side of the shell and is sealingly connected with the shell;The shell is provided with an electric igniter interface for mounting an electric igniter; The ball valve assembly is arranged in the shell and includes a ball valve body and a ball valve rotor;The ball valve body is provided with a cavity, and a first through hole and a second through hole are arranged on the outer wall of the ball valve body and communicate with the cavity;The first through hole communicates with the electric igniter interface, and the second through hole communicates with the booster interface; The ball valve rotor is matched arranged in the cavity, and the ball valve rotor is provided with a fire separation channel and an ignition channel that do not communicate with each other;One end of the fire separation channel is circumferentially spaced apart from one end of the ignition channel, and can be sequentially communicated with the first through hole under the circumferential rotation of the ball valve rotor;When one end of the fire separation channel communicates with the first through hole, the other end of the fire separation channel communicates with the air chamber;When one end of the ignition channel communicates with the first through hole, the other end of the ignition channel communicates with the second through hole; The rotating assembly is connected with the ball valve rotor and is used to drive the ball valve rotor to rotate circumferentially.

2. The spark controlled safety mechanism according to claim 1, characterized in that It also includes an explosive charge, which is arranged between the ball valve body and the mounting seat, one end of which sealingly communicates with the electric igniter interface, and the other end sealingly communicates with the first through hole.

3. The spark controlled safety mechanism of claim 1, wherein, The ball valve body is provided with a third through hole communicating with the cavity at one end close to the air chamber, and a support shaft coaxial with the rotating assembly is arranged in the third through hole;An axial through hole is arranged in the support shaft, one end of which sealingly communicates with the other end of the fire separation channel, and the other end sealingly communicates with the air chamber.

4. The spark controlled safety mechanism of claim 1, wherein, The rotating assembly includes a motor and a transmission shaft;The motor is a direct current servo motor with power-off brake function, the output shaft of the motor is coaxially connected with one end of the transmission shaft;The ball valve rotor is provided with a key groove at one end close to the motor, and the other end of the transmission shaft is sealingly arranged in the ball valve body and is coaxially connected with the ball valve rotor through the key groove.

5. The spark controlled safety mechanism of claim 1, wherein, It also includes a state indicating assembly;The state indicating assembly is arranged between the ball valve body and the rotating assembly and includes a microswitch, a reed and a trigger;The reed is fixedly arranged on the ball valve body, and the trigger is fixedly arranged on the output end of the rotating assembly to rotate with the ball valve rotor;When the ball valve rotor rotates to the ignition channel communicating with the first through hole, the trigger presses the reed to close the microswitch and generates a working state electrical signal;When the ball valve rotor rotates to the fire separation channel communicating with the first through hole, the trigger is separated from the reed, the microswitch is turned off, and a safety state electrical signal is generated.

6. The spark controlled safety mechanism of claim 5, wherein, The mounting seat is further provided with an electric igniter connected with the rotating assembly and the state indicating assembly, so as to receive an external control instruction of the rotating assembly through the electric igniter and output a state electric signal of the state indicating assembly.

7. The spark controlled safety mechanism of claim 1, wherein, The first through hole and the second through hole are oppositely arranged on the ball valve body; the ignition channel is a straight channel, and the fire separation channel is an L-shaped channel.

8. The spark controlled safety mechanism according to any one of claims 1 to 7, characterized in that The mounting seat is provided with two electric igniter interfaces, and a set of the ball valve assembly and the rotating assembly is arranged in the shell corresponding to each of the electric igniter interfaces, and the fire separation channels in the two sets of the ball valve assembly are simultaneously communicated with the same gas chamber.

9. A method of operating a valve-controlled ignition safety mechanism for a valve- controlled ignition safety mechanism according to any one of claims 1 to 8, characterized in that The method comprises the following steps: (1) The electric igniter interface is installed with an electric igniter, and the transmission interface is connected with a transmission assembly; (2) In a safe state without ignition, the rotating assembly drives the ball valve rotor to rotate to the state that the fire separation channel is communicated with the first through hole and the gas chamber; (3) After the valve control type ignition safety mechanism receives an ignition instruction, the rotating assembly drives the ball valve rotor to rotate to the state that the two ends of the ignition channel are respectively communicated with the first through hole and the second through hole; (4) The electric igniter ignites, and the gas is sequentially transmitted into the transmission assembly through the first through hole, the ignition channel and the second through hole, and then ignites the transmission assembly; (5) After the transmission assembly is ignited, the valve control type ignition safety mechanism receives a locking instruction, and the rotating assembly drives the ball valve rotor to rotate to switch to the state of step (2).

Images