Multifunctional firer device capable of being connected, unlocked and releasing fuel gas to do work

Abstract

The invention discloses a multifunctional initiating explosive device capable of being connected, unlocked and releasing fuel gas to do work, is particularly suitable for connecting and locking when a payload flies, unlocking when the payload works and throwing through fuel gas, and belongs to the technical field of initiating explosive device unlocking devices, unlocking when the payload works and throwing through the fuel gas, and the technical field of initiating explosive device unlocking devices. According to the device, the unlocking assembly and the cartridge shell assembly are adopted, the overall load and the overall barrel are connected through the unlocking assembly, and the mechanical load of the overall load is borne through the structure of the device. In the working process, overall load unlocking is achieved through energy of the medicine shell assembly, fuel gas is released to the outside of the device, and the overall load is pushed to be discharged out of the barrel at a certain speed.

Description

Technical Field

[0001] This invention relates to a multifunctional pyrotechnic device that can connect, unlock, and release gas to perform work, and is particularly suitable for connecting and locking the payload during flight, unlocking it during operation and launching it with a gas bomb. It belongs to the technical field of pyrotechnic unlocking devices. Background Technology

[0002] To achieve maneuverability, requirements for miniaturization and more severe mechanical environments were introduced, leading to the significant replacement of metal raw materials with materials such as carbon fiber. This material change meant that metal pin structures could no longer be used for load fixing and bearing mechanical loads. Firstly, metal pin structures have limited load-bearing capacity; secondly, cutting the metal pin during unlocking places excessively high demands on the structural strength of the cylinder, and carbon fiber materials are easily damaged. Therefore, users required the pyrotechnic device to not only provide sufficient high-pressure gas for launching the overall load but also to connect and lock the overall load, and withstand the mechanical loads during flight.

[0003] Traditional pyrotechnic devices include those that can connect and unlock, and those that can generate large amounts of gas. However, there are no pyrotechnic devices that can simultaneously connect, unlock, and provide high-pressure gas ejection loads. Summary of the Invention

[0004] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a multifunctional pyrotechnic device that can be connected, unlocked and release gas to perform work. When working, it unlocks the load and releases a large amount of gas to the external cavity, pushing the load to move out of the cylinder at a certain speed.

[0005] The technical solution of the present invention is: a multifunctional pyrotechnic device that can connect, unlock, and release gas to perform work, including a sealed unlocking component and a propellant casing component;

[0006] The unlocking assembly includes a housing, a retaining ring, an adapter cylinder, a piston, and a wedge. One end of the housing has an external thread, and the other end has both internal and external threads. The internal thread end is screwed into the retaining ring to prevent the piston from flying out after unlocking. The internal thread end of the housing has several wedge holes for installing wedges. A piston is provided between the housing and the retaining ring. The piston is a stepped cylinder and is fixedly connected to the housing. The outer circumference of the large end of the piston presses against the wedge in the initial state, and the small end is sealed to the housing. The external thread is used to engage with a nut for tightening. The adapter cylinder is fixed to the internal thread end of the housing by the wedge. The internal thread end of the housing protrudes from the end of the adapter cylinder. The adapter cylinder is tightened to the overall load by the external thread and presses against the overall load by the internal thread end of the housing. Tightening the adapter cylinder achieves pre-tightening of the wedge.

[0007] The propellant casing assembly includes a propellant casing, a first baffle plate, a main charge, a second baffle plate, an aluminum washer, an ignition element, a propellant casing assembly, and a cover plate. The propellant casing is a hollow cylinder with one end having a larger diameter than the other. The smaller end has an internal thread, and the larger end has an external thread. The external thread at the larger end of the propellant casing mates with the internal threads at the inner and outer thread ends of the casing for a sealing connection. An ignition element is installed at the smaller end of the propellant casing, and the ignition element is sealed by an aluminum washer. A propellant cartridge assembly is placed in the inner cavity of the propellant casing near the ignition element. The propellant cartridge assembly is fixed by the second baffle plate. The first baffle plate is screwed into the internal thread at the larger end of the propellant casing. The main charge is filled between the first and second baffle plates. A cover plate is attached to the inner side of the first baffle plate for sealing.

[0008] Furthermore, the piston is fixed to the housing by a number of shear pins, which are axially distributed in the middle of the housing and are used to connect the housing and the piston.

[0009] Furthermore, the shearing pin is a threaded pin, with its threads connected to the housing threads, and the smooth pin part connected to the piston, for shearing during operation.

[0010] Furthermore, the small end is sealed to the housing by a second O-ring seal; the sealing structure of the second O-ring seal is a piston rod seal, which ensures that there is a certain sealing stroke when the piston moves. After the sealing stroke is exceeded, the piston no longer has a sealing effect and the gas is discharged.

[0011] Furthermore, the distance between the cylindrical end face of the piston's small end and the sealing surface of the second O-ring is greater than the thickness of the wedge.

[0012] Furthermore, it also includes a nut; the nut engages with the external thread of the housing for connection and sealing with the external overall cylinder; the housing is provided with a flange, the flange is provided with an O-ring groove, and a first O-ring is installed in the O-ring groove, so that the flange, the first O-ring and the overall cylinder form an end face sealing structure, so that the pyrotechnic device, the overall load and the overall cylinder form a sealed external cavity, ensuring the sealing of the gas discharged from the pyrotechnic device into the external cavity.

[0013] Furthermore, the housing is provided with several vent holes in the circumferential direction in the middle, and the number and diameter of the vent holes are adjusted according to the quantity and type of the explosive.

[0014] Furthermore, the thickness of the wedge is 4 mm.

[0015] Furthermore, the cylindrical end face of the piston at its small end is 13.5 mm away from the exhaust port of the housing.

[0016] Furthermore, the distance between the cylindrical end face of the large end of the piston and the retaining ring is 14mm, which is greater than the distance from the cylindrical end face of the small end of the piston to the exhaust port of the housing being fully exposed, ensuring that the exhaust port can be fully exposed after the piston is unlocked.

[0017] The advantages of this invention compared to the prior art are:

[0018] (1) This invention employs two parts: an unlocking component and a propellant casing component. The unlocking component connects the overall load and the overall cylinder, and the device itself bears the mechanical load of the overall load. During operation, the energy of the propellant casing component unlocks the overall load and releases gas outside the device, propelling the overall load out of the cylinder at a certain speed.

[0019] (2) The present invention integrates the overall load locking, unlocking, gas release and load ejection into a pyrotechnic device, which solves the problem that existing ejection tube devices cannot simultaneously connect and lock the overall load.

[0020] (3) The present invention, through the design of wedge and adapter, realizes the pre-tightening of wedge while tightening the adapter and load connection, forming a self-locking state, which can simplify the user's structural design;

[0021] (4) The present invention ensures gas sealing before unlocking by designing an unlocking stroke of 4mm and a sealing stroke of 5mm; it also designs a piston movement stroke of 14mm and a gas discharge hole exposure stroke of 13.5mm, and designs the gas path and timing to enable the gas to first unlock and disconnect, and then discharge into the low-pressure chamber to achieve the ejection function, thus ensuring the working timing and reliability.

[0022] (5) The present invention can adapt to different burning rates and adjust the amount of propellant by changing the propellant. The propellant can be adapted to the user's ejection speed, ejection stroke, load weight, etc.

[0023] (6) The present invention divides the pyrotechnic device into two independent parts: the unlocking component and the propellant shell component. All pyrotechnic elements and pyrotechnic agents are integrated into the propellant shell component, which facilitates storage, transportation and installation. Attached Figure Description

[0024] 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:

[0025] Figure 1 This is a main sectional view of the present invention;

[0026] Figure 2 The main sectional view and left view of the unlocking component of this invention;

[0027] Figure 3 This is a front sectional view of the drug shell assembly of the present invention;

[0028] Figure 4 This is a schematic diagram of the installation of the present invention.

[0029] in Figure 1 1. Unlock component; 2. Medicine shell component;

[0030] Figure 2 11 Housing; 12 Retaining ring; 13 Adapter cylinder; 14 Piston; 15 First O-ring seal; 16 Wedge; 17 Second O-ring seal; 18 Nut; 19 Shear pin; Figure 3 211 Propellant casing; 22 First baffle plate; 23 Main propellant; 24 Second baffle plate; 25 Aluminum gasket; 26 Ignition element; 27 Propellant casing assembly; 28 Cover plate; 29 Large gasket. Detailed Implementation

[0031] 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.

[0032] The following description, in conjunction with the accompanying drawings, provides a more detailed account of a multifunctional pyrotechnic device provided by an embodiment of the present invention, which allows for connection, unlocking, and release of gas to perform work. Figure 1 The specific implementation may include a sealing connection unlocking component and a drug shell component;

[0033] The unlocking assembly includes a housing 11, a retaining ring 12, an adapter cylinder 13, a piston 14, a wedge 16, and a nut 18. One end of the housing 11 has an external thread, and the other end has both internal and external threads. The internal thread end is screwed into the retaining ring 12 to prevent the piston 14 from flying out after unlocking. The internal thread end of the housing 11 has several wedge holes for installing the wedges 16. A piston 14, a stepped cylinder, is located between the housing 11 and the retaining ring 12 and is fixedly connected to the housing 11. The outer circumference of the large end of the piston 14 initially... In the current state, the wedge 6 is held in place, and the small end is sealed to the housing 1. The external thread is used to engage with the nut 8 for tightening. The adapter cylinder 13 is fixed to the internal thread end of the housing 11 by the wedge 16. The internal thread end of the housing 11 protrudes from the end of the adapter cylinder 13. The adapter cylinder 3 is tightened to the overall load by the external thread and the internal thread end of the housing 11 is held against the overall load. The pre-tightening of the wedge 16 is achieved by tightening the adapter cylinder 13. The nut 18 engages with the external thread of the housing 11 and is used to connect to and seal the external overall cylinder.

[0034] The propellant casing assembly includes a propellant casing 21, a first baffle plate 22, a main propellant charge 23, a second baffle plate 24, an aluminum washer 25, an ignition element 26, a propellant casing assembly 27, and a cover plate 28. The propellant casing 21 is a hollow cylinder with one end having a larger diameter than the other. The smaller end has an internal thread, and the larger end has an external thread. The external thread at the larger end of the propellant casing 21 is sealed to the internal threads at the inner and outer thread ends of the casing 11. The ignition element 26 is installed at the smaller end of the propellant casing 21 and is sealed by the aluminum washer 25. The propellant casing assembly 27 is placed in the inner cavity of the propellant casing 21 near the ignition element 26 and is fixed by the second baffle plate 24. The first baffle plate 22 is screwed into the internal thread at the larger end of the propellant casing 21. The main propellant charge 23 is inserted between the first baffle plate 22 and the second baffle plate 24. The cover plate 28 is attached to the inner side of the first baffle plate 22 for sealing.

[0035] In the embodiment of this invention, a multifunctional pyrotechnic device capable of connecting, unlocking, and releasing gas to perform work comprises two main parts: an unlocking component and a propellant casing component. The unlocking component includes a housing 11, a retaining ring 12, an adapter cylinder 13, a piston 14, a first O-ring seal 15, a wedge 16, a second O-ring seal 17, a nut 18, and a shear pin 19. The propellant casing component includes a propellant casing 21, a first baffle plate 22, a main propellant charge 23, a second baffle plate 24, an aluminum washer 25, an ignition element 26, a propellant casing component 27, a cover plate 28, and a large washer 29. The adapter cylinder 13 of the unlocking component connects to the overall load, and the flange of the housing 11 mates with the overall cylinder, sealed by the first O-ring seal 15. The nut 18 is tightened on the outside of the overall cylinder to achieve the connection and locking function of the overall load.

[0036] like Figure 2 The unlocking assembly is centered around a housing 11, which is a hollow cylinder with external threads at one end and internal and external threads at the other. A retaining ring 12 is screwed into the internally threaded end of the housing 11 to prevent the piston 14 from flying out after unlocking. Between the housing 11 and the retaining ring 12 is the piston 14, a stepped cylinder. The piston 14 is fixed to the housing 11 by several shear pins 19, and a second O-ring seal 17 seals the small cylinder of the piston 14 with the housing 11. Several wedge holes are provided in the middle of the housing 11 for installing wedges 16, which are initially held in place by the outer circumference of the large cylinder of the piston 14. The internal threads of the internal and externally threaded ends of the housing 11 are used to install the cartridge assembly 2. Nuts 18 are located outside the external threads of the internal and externally threaded ends of the housing 11, and a first O-ring seal 15 is installed in the flange O-ring seal groove of the housing 11.

[0037] like Figure 3The propellant casing 21 of the propellant casing assembly is a hollow cylinder. An ignition element 26 is installed at the small threaded end of the propellant casing 21. The ignition element 26 is sealed by an aluminum washer 25. The propellant cartridge assembly 27 is placed in the inner cavity of the propellant casing 21 near the ignition element 26. The propellant cartridge assembly 27 is fixed by a second baffle plate 24. A first baffle plate 22 is screwed into the large threaded end of the propellant casing 21. The main propellant charge 23 is installed between the first baffle plate 22 and the second baffle plate 24. A cover plate 28 is attached to the inner side of the first baffle plate 22 for sealing.

[0038] A large gasket 19 is installed between the casing assembly 2 and the unlocking assembly 1.

[0039] The adapter cylinder 13 and the housing 11 are connected by the wedge 16. The threaded end of the housing 11 protrudes from the end of the adapter cylinder 13. The adapter cylinder 13 is tightened with the overall load through the thread and the end of the housing 11 is pressed against the overall load. The pre-tightening of the wedge 16 is achieved by tightening the adapter cylinder 13.

[0040] The shear pin 19 is a threaded pin, which is threaded to the housing 11. The smooth pin part is connected to the piston 14. The threaded connection of the shear pin 19 can prevent excess material from being generated after the shear pin 19 is sheared.

[0041] A second O-ring 17 is designed between the piston 14 and the housing 11 to seal the combustion gas of the main charge 13. The sealing structure is a piston rod seal, which can ensure that the piston 14 has a certain sealing stroke when it moves. After the sealing stroke is exceeded, the piston 14 no longer has a sealing effect and the gas can be discharged.

[0042] like Figure 4 The shell 11 is designed with a flange, and a first O-ring 15 is installed in the O-ring groove of the flange. The flange and the first O-ring 15 can form a sealed cavity with the overall cylinder to ensure the sealing of the gas discharged from the pyrotechnic device to the external cavity.

[0043] Several vent holes are designed around the outer periphery of the shell 11. The number and diameter of the vent holes can be adjusted according to the quantity and type of the explosive.

[0044] The thickness and width of the wedge 16 can be adjusted according to the overall load requirements; the distance between the small cylindrical end face of the piston 14 and the sealing surface of the second O-ring 17 should be greater than the thickness of the wedge 16 to ensure reliable unlocking stroke.

[0045] The travel distance between the large cylindrical end face of piston 14 and the retaining ring 12 is greater than the distance between the small cylindrical end face of piston 14 and the exhaust port of housing 11, ensuring that the exhaust port can be fully exposed after piston 14 is unlocked. This ensures that the combustion gas can smoothly enter the external cavity after unlocking.

[0046] The working principle of this invention is:

[0047] like Figure 4As shown, the adapter cylinder 13 of the unlocking assembly is connected to the overall load, and the housing 11 is connected and sealed to the overall cylinder via a nut 18. The pyrotechnic device bears the mechanical load during the load's flight through a wedge 16, and the piston 14 is fixed by a shear pin 19, which initially limits the wedge 16 and blocks the gas exhaust port. A second O-ring 17 seals the piston 14 and the housing 11.

[0048] During operation, the ignition element 26 of the propellant assembly ignites the propellant charge 23. The gas generated by the main propellant charge 23 pushes the piston 14 to overcome the load resistance and shear the shear pin 19. After moving 4mm, the wedge block 16 is released from its limit and the wedge block 16 is unlocked. The piston 14 continues to move, passing the second O-ring seal 17 and the exhaust port. The gas can then be released from the exhaust port into the external cavity formed by the overall cylinder and the overall load, pushing the overall load to move and ejecting it from the cylinder at a certain speed.

[0049] 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.

[0050] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0051] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A multifunctional pyrotechnic device capable of connecting, unlocking, and releasing gas to perform work, characterized in that, Includes the unlocking component for the sealed connection and the capsule assembly; The unlocking assembly includes a housing (11), a retaining ring (12), an adapter cylinder (13), a piston (14), and a wedge (16). One end of the housing (11) has an external thread, and the other end has both internal and external threads. The internal thread end is screwed into the retaining ring (12) to prevent the piston (14) from flying out after unlocking. Several wedge holes are provided on the internal thread end of the housing (11) for installing the wedge (16). The piston (14) is located between the housing (11) and the retaining ring (12). The piston (14) is a stepped cylinder and is connected to the housing (11). Fixed connection; the outer periphery of the large end of the piston (14) presses against the wedge (6) in the initial state, and the small end is sealed to the housing (1); the external thread is used to cooperate with the nut (8) for tightening; the adapter (13) is fixed to the internal thread end of the housing (11) by the wedge (16), the internal thread end of the housing (11) protrudes from the end of the adapter (13), the adapter (3) is tightened to the overall load by the external thread and the internal thread end of the housing (11) presses against the overall load, and the pre-tightening of the wedge (16) is achieved by tightening the adapter (13); The propellant casing assembly includes a propellant casing (21), a first baffle plate (22), a main propellant charge (23), a second baffle plate (24), an aluminum washer (25), an ignition element (26), a propellant casing assembly (27), and a cover plate (28); the propellant casing (21) is a hollow cylinder with one end larger than the other, the smaller end having an internal thread and the larger end having an external thread; the external thread at the larger end of the propellant casing (21) is sealed to the internal thread at the inner and outer thread ends of the casing (11); the ignition element is installed at the smaller end of the propellant casing (21). The ignition element (26) is sealed by an aluminum washer (25). The cartridge assembly (27) is placed in the inner cavity of the cartridge (21) near the ignition element (26). The cartridge assembly (27) is fixed by a second baffle plate (24). The first baffle plate (22) is screwed into the large end of the cartridge (21) internal thread. The main charge (23) is installed between the first baffle plate (22) and the second baffle plate (24). A cover plate (28) is pasted on the inner side of the first baffle plate (22) for sealing.

2. The multifunctional pyrotechnic device according to claim 1, characterized in that, it can be connected, unlocked, and release gas to perform work. The piston (14) is fixed to the housing (11) by a number of shear pins (19), which are axially distributed in the middle of the housing (11) and are used to connect the housing (11) and the piston (14).

3. A multifunctional pyrotechnic device according to claim 2, characterized in that, it can be connected, unlocked, and release gas to perform work. The shearing pin (19) is a threaded pin, with its threads connected to the housing (11), and the smooth pin part connected to the piston (14) for shearing during operation.

4. A multifunctional pyrotechnic device according to claim 1, characterized in that, it can be connected, unlocked, and release gas to perform work. The small end is sealed to the housing (1) by a second O-ring seal (17); the sealing structure of the second O-ring seal (17) is a piston rod seal, which ensures that the piston (14) has a certain sealing stroke when it moves. After the sealing stroke is exceeded, the piston (14) no longer has a sealing effect and the gas is discharged.

5. A multifunctional pyrotechnic device according to claim 4, characterized in that, it can be connected, unlocked, and release gas to perform work. The distance between the cylindrical end face of the small end of the piston (14) and the sealing surface of the second O-ring seal (17) is greater than the thickness of the wedge (16).

6. A multifunctional pyrotechnic device according to claim 1, characterized in that, it can be connected, unlocked, and release gas to perform work. It also includes a nut (18); the nut (18) is threaded with the outer thread of the housing (11) for connecting and sealing with the outer overall cylinder; the housing (11) is provided with a flange, the flange is provided with an O-ring groove, and a first O-ring (15) is installed in the O-ring groove for the flange, the first O-ring (15) and the overall cylinder to form an end face sealing structure, so that the pyrotechnic device, the overall load and the overall cylinder form a sealed external cavity, ensuring that the gas discharged from the pyrotechnic device into the external cavity is sealed.

7. A multifunctional pyrotechnic device according to claim 1, characterized in that, it can be connected, unlocked, and release gas to perform work. The shell (11) is provided with several vent holes in the middle circumferential direction. The number and diameter of the vent holes are adjusted according to the quantity and type of the explosive.

8. A multifunctional pyrotechnic device according to claim 1, characterized in that, it can be connected, unlocked, and release gas to perform work. The thickness of the wedge (16) is 4 mm.

9. A multifunctional pyrotechnic device according to claim 1, characterized in that, it can be connected, unlocked, and release gas to perform work. The cylindrical end face of the small end of the piston (14) is 13.5 mm away from the exhaust port of the housing (11).

10. A multifunctional pyrotechnic device according to claim 1, characterized in that, it can be connected, unlocked, and release gas to perform work. The distance between the cylindrical end face of the large end of the piston (14) and the retaining ring (12) is 14mm, which is greater than the distance from the cylindrical end face of the small end of the piston (14) to the exhaust port of the housing (11) when it is fully exposed, ensuring that the exhaust port can be fully exposed after the piston (14) is unlocked.

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