CN116044607A - Engine safety device - Google Patents
Engine safety device Download PDFInfo
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- CN116044607A CN116044607A CN202211702514.2A CN202211702514A CN116044607A CN 116044607 A CN116044607 A CN 116044607A CN 202211702514 A CN202211702514 A CN 202211702514A CN 116044607 A CN116044607 A CN 116044607A
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- piston
- igniter
- hole
- engine
- safety device
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- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims description 25
- 238000012546 transfer Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- 238000007789 sealing Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/08—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants
- F02K9/32—Constructional parts; Details not otherwise provided for
- F02K9/38—Safety devices, e.g. to prevent accidental ignition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/95—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by starting or ignition means or arrangements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention discloses an engine safety device, which belongs to the technical field of engine safety and comprises a shell and a piston arranged in the shell, wherein an igniter is separated from a fire transmission hole on the shell through the piston, and the piston is locked through a locking mechanism, so that the energy of the igniter cannot be transmitted to the fire transmission hole when the device is in a safe state; and when the ignition device is in a working state, the locking mechanism is used for unlocking the piston, and meanwhile, the piston is pushed to move under the action of the output energy of the igniter, so that the igniter is communicated with the fire transmission hole. The engine safety device is simple in structure and convenient to install, can effectively realize the conversion between a safety state and a working state, further realize the switching of the fire isolating and transmitting functions of products, effectively ensure the use safety of an igniter, ensure that the engine cannot accidentally strike fire in normal times, reduce the possibility of safety accidents, and have a good application prospect.
Description
Technical Field
The invention belongs to the technical field of engine safety, and particularly relates to an engine safety device.
Background
The rocket engine is used as a power source of the rocket and plays a vital role in the rocket launching process. The engine fuel is generally solid propellant or liquid propellant, and because of the large thrust, the amount of propellant filled is generally large, and once the process of storage, transportation and emission is abnormal, the safety accident hazard is large.
The igniter is used as a starting device of rocket engine work, is a part which is most likely to cause engine accidents, static electricity or other electromagnetic fields existing around the engine can possibly cause accidental ignition of the igniter, so that in order to ensure the safety of the engine, the assembled ignition device needs to have the characteristics of reliable ignition, no accidental ignition and the like, and meets the safety requirement of the engine.
In order to prevent accidental ignition of the igniter, the means adopted at present are generally shielding measures for the igniter, but the igniter is difficult to completely shield in practical application, and the igniter is still influenced by the surrounding environment to cause the occurrence of accidents; there are also mechanical safety mechanisms installed in correspondence with igniters, but their structure is often complex and the operating steps are relatively complex.
Disclosure of Invention
In view of one or more of the above-mentioned drawbacks or improvements of the prior art, the present invention provides an engine safety device that is capable of locking the device in a safe state to achieve a fire-blocking function, and unlocking in an operating state to achieve a fire-transmitting function.
In order to achieve the above object, the present invention provides an engine safety device including a housing, a piston, and a locking mechanism;
the middle part of the shell is provided with a communication hole, one end of the communication hole is provided with at least one igniter, the other end of the communication hole is embedded with a piston, the piston can reciprocate in the communication hole, and meanwhile, the side wall of the communication hole is provided with a fire transmission hole communicated with an engine;
the locking mechanism is connected with one end of the shell close to the piston and comprises a limiting pin, and the limiting pin can extend or retract relative to the piston; correspondingly, a limit groove is formed in the piston, so that the limit pin can be extended out and inserted into the limit groove in a safe state to lock the piston, and the igniter can be separated from the fire transmission hole through the piston; meanwhile, the limiting pin can be retracted when in a working state so as to release the locking, so that the piston can move in a direction deviating from the igniter under the pushing of the output energy of the igniter, and the communication between the igniter and the fire transfer hole is realized.
As a further improvement of the invention, an opening is arranged at one end of the shell close to the piston, and a limiting body is arranged corresponding to the opening so as to limit the movable range of the piston.
As a further improvement of the invention, a buffer cushion is arranged at one end of the limiting body close to the piston so as to slow down the impact on the limiting body when the piston moves.
As a further development of the invention, a pull rod is also provided at the end of the piston facing away from the igniter, one end of the pull rod being connected to the piston and the other end passing through the limiting body, in order to check the movement of the piston in the housing by pulling the pull rod.
As a further improvement of the invention, an elastic piece is arranged at one end of the piston, which is close to the pull rod, and the elastic piece is sleeved on the pull rod;
the outer periphery of the pull rod, which is away from one end of the piston, is also provided with a boss, so that one end of the elastic piece is abutted against the piston, the other end of the elastic piece is abutted against the boss, and the elastic piece is in a compression state.
As a further improvement of the invention, the compression amount of the elastic piece is 10% -20%.
As a further development of the invention, at least one annular groove is also provided on the outer circumference of the piston, and a seal is embedded in the annular groove.
As a further improvement of the invention, a plurality of igniters are arranged on the shell, and a plurality of igniters are arranged in a staggered way.
As a further improvement of the invention, an opening is further arranged at one end of the shell close to the igniter, the opening is communicated with the communication hole, and a plug is further arranged corresponding to the opening so as to seal the opening.
As a further improvement of the invention, an observation hole is also arranged on the shell at the positions of the limiting pin and the limiting groove, and a transparent cover is arranged on the observation hole so as to observe the locking condition of the locking mechanism on the piston through the transparent cover.
The above-mentioned improved technical features can be combined with each other as long as they do not collide with each other.
In general, the above technical solutions conceived by the present invention have the beneficial effects compared with the prior art including:
(1) According to the engine safety device, the piston is arranged in the shell, the igniter is separated from the fire transmission hole in the shell through the piston, and the piston is locked through the locking mechanism, so that the energy of the igniter cannot be transmitted to the fire transmission hole when the device is in a safety state; and when the ignition device is in a working state, the locking mechanism is used for unlocking the piston, and meanwhile, the piston is pushed to move under the action of the output energy of the igniter, so that the igniter is communicated with the fire transmission hole.
(2) According to the engine safety device, one end of the piston is connected with the pull rod, so that the piston is driven to move by pulling the pull rod after the engine safety device is installed, and whether the piston moves smoothly in the shell or not is checked when the piston is in an unlocked state, so that the reliability of the movement of the piston along the movement hole is ensured; meanwhile, the elastic piece is arranged at one end of the piston, which is close to the pull rod, and is always in a compressed state, so that after the locking mechanism unlocks the piston, the piston can be continuously in a certain safe state through the compression resistance of the elastic piece, and the safety of a product is improved.
(3) According to the engine safety device, an opening communicated with the working hole is formed in one end, close to the working hole, of the shell, so that the state in the working hole and the movement condition of the piston in the movement hole after the igniter acts on the opening are checked; through holes are formed in the shell at the connecting positions of the locking mechanism and the piston, and the through holes are sealed through the through cover, so that whether the locking mechanism locks the piston or not is confirmed through the through cover.
(4) The engine safety device is simple in structure and convenient to install, can effectively realize the conversion between a safety state and a working state, further realize the switching of the fire isolating and transmitting functions of products, effectively ensure the use safety of an igniter, ensure that the engine cannot accidentally strike fire in normal times, reduce the possibility of safety accidents, and have a good application prospect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a sectional view B-B of an engine safety device in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of an engine safety device in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an engine safety device in an embodiment of the present invention in operation;
FIG. 4 is a schematic view of the overall structure of an engine safety device according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a housing in an engine safety apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of a housing in an engine safety device according to an embodiment of the present invention;
like reference numerals denote like technical features throughout the drawings, in particular: 1. a piston; 2. a pull rod; 3. a limit spring; 4. a housing; 5. a limiting body; 6. a cushion pad; 7. a protective cap; 8. a plug; 9. a first seal; 10. a locking mechanism; 11. an igniter; 12. a bolt; 13. a transparent cover;
401. a working hole; 402. a movement hole; 403. a limiting hole; 404. a fire hole; 405. an observation hole; 406. a first mounting hole; 407. a second mounting hole; 408. and a positioning table.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
In the description of the present invention, it should be understood that 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Examples:
referring to fig. 1 to 6, an engine safety device according to a preferred embodiment of the present invention includes a housing 4, a piston 1, and a locking mechanism 10. Wherein the piston 1 is arranged in the housing 4, can reciprocate in the housing 4, and locks and unlocks the piston 1 through the locking mechanism 10 to realize the switching between the safe state and the working state of the device.
Specifically, as shown in fig. 1 and 5, the housing 4 in the preferred embodiment is a hollow structure having a communication hole in the middle, and is provided with at least one igniter 11 at one end of the communication hole, and a second mounting hole 407 is correspondingly provided on the communication hole for the mating mounting of the igniters 11; correspondingly, the piston 1 is embedded at the other end of the communication hole, and the piston 1 can reciprocate in the communication hole; and a fire transfer hole 404 which can be communicated with the engine is also arranged on the side wall of the shell 4 at the end.
In actual setting, when a plurality of igniters 11 are provided, the igniters 11 are preferably arranged in a relative dislocation mode, so that energy output during the action of the igniters 11 is prevented from directly acting on the end face of the opposite igniter 11, and hidden quality hazards are avoided. The igniter 11 in the preferred embodiment is an electrical squib that can output detonation energy upon energization.
Further, the locking mechanism 10 in the preferred embodiment is disposed at the end of the housing 4 adjacent to the piston 1 and includes a stop pin that can extend or retract relative to the piston 1; correspondingly, a limit groove is formed on the piston 1 corresponding to the limit pin, so that the limit pin can be extended out and inserted into the limit groove to lock the piston 1 in a safe state, so that the piston 1 cannot move in the communication hole and the igniter 11 is separated from the fire transmission hole 404; meanwhile, the limit pin can be retracted in the working state to release the locking of the piston 1, so that the piston 1 can move away from the igniter 11 under the pushing of the energy output by the igniter 11 to realize the communication between the igniter 11 and the fire transfer hole 404, as shown in fig. 3, so as to transfer the energy output by the igniter 11 to the engine through the fire transfer hole 404 to ignite the ignition cartridge in the engine.
In practical arrangement, the locking mechanism 10 in the preferred embodiment is an electromagnetic locking mechanism, and further includes an electromagnet that can drive the stop pin to retract after the locking mechanism 10 is powered in the forward direction and can drive the stop pin to extend after the locking mechanism is powered in the reverse direction. Preferably, the electromagnet is a differential magnetic holding type electromagnet, the magnetic holding force is not less than 40N in the shaft extension state and the shaft contraction state, and the action release time is not more than 100ms.
It will be appreciated that the safe condition in the preferred embodiment is a non-operating condition of the igniter 11 during storage, shipping, etc. where ignition of the igniter 11 is not required; the operating state is a state in which the engine needs to be ignited by the igniter 11.
Specifically, in the preferred embodiment, corresponding to the connection between the locking mechanism 10 and the housing 4, a first mounting hole 406 is provided on the outer peripheral wall at the corresponding position of the housing 4, which communicates with the movement hole 402, so that after the locking mechanism 10 is fixedly mounted on the housing 4 through the first mounting hole 406, a stopper pin on the locking mechanism 10 can enter the movement hole 402 through the first mounting hole 406 and be inserted into a stopper groove on the piston 1.
Preferably, the limit groove is set to be an annular limit groove so as to facilitate matching between the limit pin and the limit groove. It is further preferred that a third seal is also provided within the first mounting hole 406 to effect a seal between the locking mechanism 10 and the housing 4. In practical arrangement, the material used for the sealing member is preferably fluorosilicone rubber, and the compression amount is 8% -15%.
Preferably, an observation hole 405 is further formed in the housing 4 where the limit pin and the limit groove are matched, so as to observe the locking condition between the electromagnetic locking mechanism 10 and the piston 1; meanwhile, a transparent cover 13 is also mounted on the observation hole 405 to seal the observation hole 405. Preferably, the transparent cover 13 is a transparent organic glass material.
In practical arrangement, in order to further limit the movement range of the piston 1, as shown in fig. 5, the communication hole is preferably configured as a stepped hole, including a working hole 401 and a movement hole 402, wherein the inner diameter of the working hole 401 is smaller than the inner diameter of the movement hole 402 to form an annular step at the joint of the two, so as to limit the piston 1, and the piston 1 can only move in the movement hole 402 but cannot move into the working hole 401, so that the normal operation of the igniter 11 is prevented from being influenced by the piston 1.
Preferably, in order to better isolate the ignition 11 and the fire transfer hole 404 of the piston 1, at least one annular groove is provided on the outer peripheral wall of the end of the piston 1 near the working hole 401, and a first sealing member 9 is provided in the annular groove. As shown in fig. 1, in the preferred embodiment, 4 annular grooves are provided on the outer circumferential wall of one end of the piston 1, and a first seal 9 is placed in each annular groove to prevent the igniter 11 from being accidentally ignited in a safe state, ensuring that energy generated by the igniter 11 is not transferred into the fire transfer hole 404 from the gap between the piston 1 and the moving hole 402.
Further, in order to facilitate the installation of the piston 1, an opening is provided at an end of the housing 4 near the piston 1 to place the piston 1 in the communication hole through the opening; correspondingly, a limiting body 5 is further arranged corresponding to the opening in the preferred embodiment, and is used for sealing the opening so as to seal the piston 1 in the movement hole 402, limit the movable range of the piston 1 and prevent the piston 1 from being separated from the shell 4 under the action of the igniter 11.
In the preferred embodiment shown in fig. 1, corresponding to the installation of the limiting body 5, a limiting hole 403 is further provided at one end of the housing 4, which communicates with the moving hole 402, preferably the inner diameter of the limiting hole 403 is larger than the inner diameter of the moving hole 402, and the limiting body 5 is fixedly installed in the limiting hole 403 by a screw. Preferably, a fifth sealing member is further provided between the limiting body 5 and the housing 4 to further seal the port of the housing 4, preventing the energy of the igniter 11 from leaking from the port in the operating state, affecting the normal ignition of the engine.
It is further preferable that a cushion pad 6 is further provided on a side of the limiting body 5 near the piston 1, for reducing impact to the limiting body 5 when the piston 1 moves toward the direction of the limiting body 5 and collides against the limiting body 5. In practice, the material of the cushion pad 6 may preferably be rubber.
Further, in the preferred embodiment, a pull rod 2 is further disposed at one end of the piston 1 facing away from the igniter 11, one end of the pull rod is connected with the piston 1, and the other end of the pull rod passes through the limiting body 5, so that the piston 1 can be driven to move by pulling the pull rod 2 to check the movement condition of the piston 1 in the movement hole 402. Preferably, a fourth sealing element is further arranged at one end of the pull rod 2 close to the limiting body 5, so as to realize sealing between the pull rod 2 and the limiting body 5.
Preferably, a through hole is further formed in one end of the pull rod 2, which is away from the piston 1, and a steel wire is inserted into the through hole, so that the pull rod 2 can be pulled conveniently. As shown in fig. 1, the piston 1 is provided in the preferred embodiment with an axially extending blind bore at the end facing away from the working bore 401 and with a thread in the blind bore for a threaded connection between the piston 1 and the pull rod 2.
Meanwhile, in order to further improve the stability of the piston 1 in a safe state, an elastic piece is further arranged at one end of the piston 1, which is close to the pull rod 2, and the elastic piece is always in a compressed state, so that after the electromagnetic locking mechanism 10 releases the locking of the piston 1, the piston 1 can be kept in a certain safe state through the compression resistance of the elastic piece, and unnecessary movement of the piston 1 when the piston 1 receives a larger external force is prevented, and potential safety hazards are avoided.
As shown in fig. 1, in order to facilitate the installation of the elastic member, the blind hole on the piston 1 is provided in the form of a stepped hole in the preferred embodiment to abut one end of the elastic member against the annular step; accordingly, in the preferred embodiment, a boss is provided on the outer periphery of one end of the pull rod 2 facing away from the piston 1, and the elastic member is sleeved on the pull rod 2, so that the other end of the elastic member abuts against the boss and is in a compressed state after the assembly is completed. As shown in fig. 1, the elastic member in the preferred embodiment is a limit spring 3, and further, it is preferred that the compression amount of the limit spring 3 after the completion of the assembly is 10% -20%.
Further, as shown in fig. 1, in the preferred embodiment, an end of the housing 4 near the igniter 11 is provided with an opening communicating with the communication hole, that is, the working hole 401 is provided with a through hole so as to check the state in the working hole 401 after the igniter 11 is applied and the movement of the piston 1 in the housing 4 through the opening. Meanwhile, a plug 8 is preferably arranged corresponding to the opening, and is fixed at the end of the shell 4 through threaded connection so as to seal the opening at the end of the shell 4, and a sealing gasket is preferably arranged between the shell 4 and the plug 8 so as to ensure the tightness between the two.
Further, in order to facilitate the fixed mounting of the housing 4 to the engine, a positioning table 408 is further provided on the housing 4, as shown in fig. 5 and 6, the positioning table 408 in the preferred embodiment is provided on the outer peripheral wall of the housing 4 corresponding to the fire hole 404, and a through hole is provided on the positioning table 408 corresponding to the fire hole 404 to communicate with the fire hole 404.
Accordingly, the corresponding positioning table 408 in the preferred embodiment is also provided with a protective cap 7 which is mounted to the positioning table 408 when the housing 4 is not mounted to the engine and is fixed by the bolts 12 to protect and seal the fire hole 404 so that the energy thereof cannot be released through the fire hole 404 even if the igniter 11 is accidentally applied. A second seal is preferably also provided between the locating table 408 and the protective cap 7 to further enhance the sealing of one end of the fire transfer hole 404.
The engine safety device is simple in structure and convenient to install, can effectively realize the conversion between a safety state and a working state, further realize the switching of the fire isolating and transmitting functions of products, effectively ensure the use safety of the igniter, ensure that the engine cannot accidentally strike fire in normal times, reduce the possibility of safety accidents, and have good application prospects.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. An engine safety device is characterized by comprising a shell, a piston and a locking mechanism;
the middle part of the shell is provided with a communication hole, one end of the communication hole is provided with at least one igniter, the other end of the communication hole is embedded with a piston, the piston can reciprocate in the communication hole, and meanwhile, the side wall of the communication hole is provided with a fire transmission hole communicated with an engine;
the locking mechanism is connected with one end of the shell close to the piston and comprises a limiting pin, and the limiting pin can extend or retract relative to the piston; correspondingly, a limit groove is formed in the piston, so that the limit pin can be extended out and inserted into the limit groove in a safe state to lock the piston, and the igniter can be separated from the fire transmission hole through the piston; meanwhile, the limiting pin can be retracted when in a working state so as to release the locking, so that the piston can move in a direction deviating from the igniter under the pushing of the output energy of the igniter, and the communication between the igniter and the fire transfer hole is realized.
2. The engine safety device according to claim 1, wherein an opening is provided at an end of the housing near the piston, and a stopper is provided corresponding to the opening to restrict a movable range of the piston.
3. The engine safety according to claim 2, wherein a cushion is further provided at an end of the stopper body near the piston to slow down the impact to the stopper body when the piston moves.
4. The engine safety according to claim 2, wherein a pull rod is further provided at an end of the piston facing away from the igniter, one end of the pull rod being connected to the piston, and the other end passing through the stopper so as to check the movement of the piston in the housing by pulling the pull rod.
5. The engine safety device according to claim 4, wherein an elastic member is further arranged at one end of the piston, which is close to the pull rod, and the elastic member is sleeved on the pull rod;
the outer periphery of the pull rod, which is away from one end of the piston, is also provided with a boss, so that one end of the elastic piece is abutted against the piston, the other end of the elastic piece is abutted against the boss, and the elastic piece is in a compression state.
6. The engine safety device according to claim 5, wherein the compression amount of the elastic member is 10% -20%.
7. The engine safety device according to any one of claims 1 to 6, wherein at least one annular groove is further provided on the outer periphery of the piston, and a seal is embedded in the annular groove.
8. The engine safety device according to any one of claims 1 to 6, wherein a plurality of igniters are provided on the housing, and a plurality of the igniters are arranged in a staggered manner.
9. The engine safety device according to claim 8, wherein an opening is further provided at an end of the housing adjacent to the igniter, which communicates with the communication hole, and a plug is further provided corresponding to the opening to seal the opening.
10. The engine safety device according to any one of claims 1 to 6 and 9, characterized in that an observation hole is further formed in the housing where the limiting pin and the limiting groove are located, and a transparent cover is mounted on the observation hole, so that the locking condition of the locking mechanism on the piston is observed through the transparent cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211702514.2A CN116044607B (en) | 2022-12-29 | 2022-12-29 | Engine safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211702514.2A CN116044607B (en) | 2022-12-29 | 2022-12-29 | Engine safety device |
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| Publication Number | Publication Date |
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| CN116044607A true CN116044607A (en) | 2023-05-02 |
| CN116044607B CN116044607B (en) | 2024-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211702514.2A Active CN116044607B (en) | 2022-12-29 | 2022-12-29 | Engine safety device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116838499A (en) * | 2023-08-30 | 2023-10-03 | 北京星河动力装备科技有限公司 | Engine safety mechanism, solid engine and carrier rocket |
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| JPS4845000A (en) * | 1971-05-22 | 1973-06-27 | ||
| US3949676A (en) * | 1974-06-10 | 1976-04-13 | The United States Of America As Represented By The Secretary Of The Navy | Load actuated electro-ignition circuit switch |
| JP2007051740A (en) * | 2005-08-19 | 2007-03-01 | Daicel Chem Ind Ltd | Pyro-type valve |
| JP2017198165A (en) * | 2016-04-28 | 2017-11-02 | 国立研究開発法人宇宙航空研究開発機構 | Ignition safety device |
| CN111622863A (en) * | 2020-06-05 | 2020-09-04 | 湖北三江航天红林探控有限公司 | Thrust termination device of small solid rocket engine |
| CN216418135U (en) * | 2021-10-15 | 2022-05-03 | 珠海宝银智能科技有限公司 | Fire control bullet with safety control electric energy initiation function and system thereof |
| CN115263610A (en) * | 2022-07-27 | 2022-11-01 | 宁波天擎航天科技有限公司 | Safety ignition device of solid rocket engine |
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2022
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| JPS4845000A (en) * | 1971-05-22 | 1973-06-27 | ||
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| JP2017198165A (en) * | 2016-04-28 | 2017-11-02 | 国立研究開発法人宇宙航空研究開発機構 | Ignition safety device |
| CN111622863A (en) * | 2020-06-05 | 2020-09-04 | 湖北三江航天红林探控有限公司 | Thrust termination device of small solid rocket engine |
| CN216418135U (en) * | 2021-10-15 | 2022-05-03 | 珠海宝银智能科技有限公司 | Fire control bullet with safety control electric energy initiation function and system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116838499A (en) * | 2023-08-30 | 2023-10-03 | 北京星河动力装备科技有限公司 | Engine safety mechanism, solid engine and carrier rocket |
| CN116838499B (en) * | 2023-08-30 | 2024-01-09 | 北京星河动力装备科技有限公司 | Engine safety mechanism, solid engine and carrier rocket |
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| Publication number | Publication date |
|---|---|
| CN116044607B (en) | 2024-07-09 |
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