Anti-leakage overload-resistant micro-miniature fuse security unlocking pin pulling device

Abstract

The utility model belongs to the technical field of initiating explosive devices, and particularly relates to a leakage-proof overload-resistant microminiature fuse security unlocking pin pulling device. The utility model relates to a leakproof overload-resistant micro-miniature fuse security unlocking pull pin device which comprises an ignition element, a piston assembly, a gasket group and an outer shell. The ignition element is a micro-sized electric initiating explosive device and is used for outputting high-temperature fuel gas and providing energy for displacement driving of a piston rod in the piston assembly; through the design of the petal-shaped groove type retaining tooth pieces, impact high overload can be borne, and after the actuating device works, the retaining tooth pieces deform. The leakage-proof overload-resistant micro-miniature fuse security unlocking pull pin device is provided with a primary sealing structure among a piston rod, a sealing gasket and a two-connecting body in a piston assembly and a secondary sealing structure among an output end piston rod, the sealing gasket and an outer shell, so that the leakage of generated high-temperature and high-pressure fuel gas can be avoided; and meanwhile, the sealing of the high-energy fuel gas is also beneficial to the maintenance of the pin pulling unlocking function.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of initiating explosive, and particularly relates to a small-sized fuze security unlocking pin pulling device capable of preventing leakage and resisting overload. BACKGROUND

[0002] The fuze security unlocking pin pulling device is a fuze security actuator driven by displacement of a piston using high-energy gas formed after combustion of gunpowder as a power source.

[0003] The small-sized fuze security unlocking pin pulling device is used in a micro-electro-mechanical system and is one of the most critical components capable of achieving a safe and reliable security function. In underwater detection and space exploration, in order to ensure the reliability of task execution, the small-sized fuze security unlocking pin pulling device is required to have the performance characteristics of small size, rapid action, accurate driving displacement, and the characteristics of no leakage of redundant materials, stable security unlocking state, etc.

[0004] Therefore, it is necessary to develop a small-sized fuze security unlocking pin pulling device capable of preventing leakage and resisting overload in various harsh environmental conditions. CONTENT OF THE UTILITY MODEL

[0005] The utility model adopts the following technical solutions:

[0006] A small-sized fuze security unlocking pin pulling device capable of preventing leakage and resisting overload, comprising a firing element 1, a piston assembly 2, a gasket set 3, and an outer shell 4.

[0007] The firing element 1 is a small-sized electric initiating explosive for outputting high-temperature gas and providing energy for displacement driving of a piston rod 201 in the piston assembly 2.

[0008] The piston assembly 2 comprises a piston 201, a retreat-stop tooth sheet 202, a steel sleeve 203, a gasket 204, a sealing gasket 205 and a two-piece body 206; the two-piece body 206 comprises a piston cylinder 206-1 and a positioning gasket 206-2, the piston cylinder 206-1 is an open-ended cylindrical shell, and the positioning gasket 206-2 is located outside the bottom surface of the closed end of the piston cylinder 206-1; the positioning gasket 206-2 is symmetrically provided with flow guide air inlet channels, so that the high-energy gas generated after the action of the firing element enters the cavity between the piston 201 and the two-piece body 206 along the transmission channel between the piston cylinder 206-1 and the outer shell 4, pushes the piston 201 to retract, and the fuze safety unlocking function is realized; the piston rod of the piston 201 is provided with the sealing gasket 205 and the gasket 204, and the steel sleeve 203 is located above the gasket 204 for positioning the sealing gasket 205 and the gasket 204; a recess is provided on the piston rod body of the piston 201 as an assembly groove, the retreat-stop tooth sheet 202 is assembled in the recess and covers the open end of the piston cylinder 206-1, and the retreat-stop tooth sheet 202 is a tooth sheet provided with petal-shaped groove type.

[0009] The gasket set 3 is located above the retreat-stop tooth sheet 202 of the piston rod of the piston assembly 2 and is assembled into the hole of the outer shell 4 together with the piston assembly 2; the gasket set 3 seals the retreat-stop tooth sheet 202 and the upper part of the outer shell 4; the bottom end of the positioning gasket 206-2 is connected with the firing element 1.

[0010] Preferably, a through hole is provided in the middle of the piston 201.

[0011] Preferably, five fan-shaped petal grooves are uniformly provided on the retreat-stop tooth sheet 202 along the center of a circle.

[0012] Preferably, the positioning gasket 206-2 is a disc type, a plurality of strip grooves are uniformly provided on the circumference of the disc towards the center of the disc, and the flow guide air inlet channels are formed.

[0013] Further, the strip grooves are four in total and are distributed at intervals of 90°.

[0014] Further, the diameter of the positioning gasket 206-2 is greater than the diameter of the piston cylinder 206-1.

[0015] Preferably, the retreat-stop tooth sheet 202 is a precipitation-hardened stainless steel 07Cr17Ni7Al.

[0016] Preferably, the sealing gasket 205 is two in total, is designed to be an interference fit in cooperation with the piston 201 and the two-piece body 206, is made of polyurethane rubber, and realizes the anti-leakage function of high-energy gas.

[0017] Preferably, the transducer element of the firing element 1 is a bridge wire, a bridge belt or a semiconductor chip.

[0018] Preferably, the gasket set 3 comprises an inner gasket, two outer gaskets and an outer gasket, which are sequentially arranged on the piston rod from inside to outside.

[0019] The utility model discloses the beneficial effect of:

[0020] The utility model discloses a stop tooth piece with petal -shaped groove type, can bear not less than 1000g's impact high overload, ensure that the piston of micro - actuator is positioned locking state not be destroyed under the overload condition of at least 1000g / 12ms, after actuator works, stop tooth piece deformation, can guarantee the drive displacement of piston under the overload condition of at least 1000g / 12ms does not occur to withdraw. The micro - actuator of leakage - proof overload - resistant fuse security unlocking pull - out pin device that the utility model discloses designs one - time sealing structure between piston rod - sealing gasket - two - body in piston assembly and secondary sealing structure between output end piston rod - sealing gasket - outer shell, can guarantee that high - temperature high - pressure gas generated in the work of fuse security unlocking pull - out pin device does not leak, and the sealing of high - energy gas is also favorable to the maintenance of pull - out pin unlocking function. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of the leakage - proof overload - resistant micro - actuator of fuse security unlocking pull - out pin device that the utility model discloses.

[0022] Figure 2 It is the piston assembly schematic diagram of the leakage - proof overload - resistant micro - actuator of fuse security unlocking pull - out pin device that the utility model discloses.

[0023] Figure 3 It is the piston rod schematic diagram of the leakage - proof overload - resistant micro - actuator of fuse security unlocking pull - out pin device that the utility model discloses.

[0024] A - assembly groove;

[0025] Figure 4 It is the stop tooth piece schematic diagram of the leakage - proof overload - resistant micro - actuator of fuse security unlocking pull - out pin device that the utility model discloses.

[0026] Figure 5 It is two - body schematic diagram of the leakage - proof overload - resistant micro - actuator of fuse security unlocking pull - out pin device that the utility model discloses.

[0027] Figure 6 It is the positioning gasket schematic diagram of the leakage - proof overload - resistant micro - actuator of fuse security unlocking pull - out pin device that the utility model discloses.

[0028] B - flow guide inlet passage. DETAILED DESCRIPTION

[0029] The utility model makes further explanation in combination with the drawings.

[0030] As Figures 1-6 shown in the figure, a kind of leakage-proof overload-resistant micro fuze security unlocking pull pin device, including firing element 1, piston assembly 2, washer group 3, outer shell 4;

[0031] The firing element 1 is the electric detonator of micro size, for the displacement drive of piston rod 201 in piston assembly 2, provides energy;The firing element 1 transducer element is bridge wire.

[0032] The piston assembly 2 includes piston 201, stop tooth piece 202, steel sleeve 203, washer 204, sealing washer 205 and two couples 206;The two couples 206 include piston cylinder 206-1 and positioning washer 206-2, and the piston cylinder 206-1 is the cylindrical shell with one end opening, and the positioning washer 206-2 is located on the bottom surface outside the closed end of the piston cylinder 206-1;Positioning washer 206-2 is symmetrically provided with flow guide air inlet channel, so that the high-energy gas generated after the firing element acts enters the cavity between piston 201 and two couples 206 along the transmission channel between piston cylinder 206-1 and outer shell 4, pushes piston 201 to retract, and the fuze security unlocking function is realized;The positioning washer 206-2 is disc type, and a plurality of strip grooves are uniformly arranged from the circumference of the disc to the center, to form the flow guide air inlet channel.The strip grooves are four, and are distributed at intervals of 90°.The diameter of the positioning washer 206-2 is greater than the diameter of the piston cylinder 206-1.A sealing washer 205 and a washer 204 are arranged on the piston rod of the piston 201, and the steel sleeve 203 is located above the washer 204 to position the sealing washer 205 and the washer 204;The sealing washer 205 is two, and is designed as interference fit with the cooperation of the piston 201 and the two couples 206, and is made of polyurethane rubber, to realize the leakage-proof function of high-energy gas.A recess is arranged on the piston rod body of the piston 201 as an assembly groove, the stop tooth piece 202 is assembled in the recess and covers the open end of the piston cylinder 206-1, and the stop tooth piece 202 is a tooth piece with petal-shaped groove type;The stop tooth piece 202 is deposited type hardened stainless steel 07Cr17Ni7Al.

[0033] The washer group 3 is located above the stop tooth piece 202 of the piston rod of the piston assembly 2, and is assembled into the hole of the outer shell 4 together with the piston assembly 2;The washer group 3 seals the stop tooth piece 202 and the top of the outer shell 4;The washer group 3 includes an inner washer, two outer sealing rings and an outer washer, which are sequentially assembled on the piston rod from inside to outside.The bottom end of the positioning washer 206-2 is connected with the firing element 1.

[0034] Five fan-shaped petal grooves are uniformly arranged on the stop tooth piece 202 along the center.

[0035] The preferred embodiment provides a leakage-proof and overload-resistant micro-sized fuse security unlocking pin pulling device. A firing element input end is connected with a system line, and a piston rod is connected with a system load. Before receiving a work signal, the device can ensure that the piston positioning locking state is not damaged under the condition of 1000g / 12ms overload. After receiving the work signal, the piston 201 is driven to displace under the work of high-temperature and high-pressure gas. During the driving displacement, the petal-shaped tooth piece of the stop tooth piece installed in the assembly groove of the piston rod is deformed in the same direction of the movement of the piston rod. The deformation enables the piston security unlocking function to be irreversible under the condition of 1000g / 12ms overload after the piston security unlocking function is completed. The primary sealing structure between the piston rod, the sealing gasket and the two couples in the piston assembly and the secondary sealing structure between the output end piston rod, the sealing gasket and the outer shell can ensure that the generated high-temperature and high-pressure gas does not leak.

Claims

1. A leak-proof, overload-resistant miniature fuse security unlocking pin removal device, characterized in that, It includes an ignition element (1), a piston assembly (2), a gasket assembly (3), and a housing (4); The ignition element (1) is an electro-fired device; The piston assembly (2) includes a piston (201), a retaining tooth plate (202), a steel sleeve (203), a washer (204), a sealing washer (205), and a dual assembly (206); the dual assembly (206) includes a piston cylinder (206-1) and a positioning gasket (206-2). The piston cylinder (206-1) is a cylindrical shell with one open end, and the positioning gasket (206-2) is located on the outer side of the bottom surface of the sealed end of the piston cylinder (206-1); the positioning gasket (206-2) is symmetrically provided with air intake channels, connecting the piston cylinder (206-1) and... The fire transmission channel between the outer shell (4) enters the cavity between the piston (201) and the twin body (206); the piston rod of the piston (201) is provided with a sealing washer (205) and a gasket (204), and the steel sleeve (203) is located above the gasket (204) to position the sealing washer (205) and the gasket (204); the piston rod of the piston (201) is provided with a groove as an assembly groove, and the anti-reverse tooth (202) is assembled in the groove and covers the open end of the piston cylinder (206-1). The anti-reverse tooth (202) is a tooth with a petal-shaped groove. The washer assembly (3) is located above the anti-reverse tooth (202) of the piston rod of the piston assembly (2), and is installed together with the piston assembly (2) into the hole of the outer shell (4); the washer assembly (3) seals the anti-reverse tooth (202) and the upper part of the outer shell (4); the bottom end of the positioning washer (206-2) is connected to the ignition element (1).

2. The leak-proof, overload-resistant miniature fuse security unlocking pin removal device according to claim 1, characterized in that, The anti-reverse toothed plate (202) has five fan-shaped slots evenly arranged along its center.

3. The leak-proof, overload-resistant miniature fuse security unlocking and pin-pulling device according to claim 1, characterized in that, The positioning pad (206-2) is disc-shaped, with several strip grooves evenly distributed around the circumference of the disc towards the center, forming a guide air intake channel.

4. The leak-proof, overload-resistant miniature fuse security unlocking pin removal device according to claim 3, characterized in that, There are four strip grooves in total, distributed at 90° intervals.

5. The leak-proof, overload-resistant miniature fuse security unlocking and pin-pulling device according to claim 3, characterized in that, The diameter of the positioning pad (206-2) is larger than the diameter of the piston cylinder (206-1).

6. The leak-proof, overload-resistant miniature fuse security unlocking pin removal device according to claim 1, characterized in that, The anti-reverse toothed plate (202) is precipitation-hardened stainless steel 07Cr17Ni7Al.

7. The leak-proof, overload-resistant miniature fuse security unlocking pin removal device according to claim 1, characterized in that, There are two sealing gaskets (205), which are designed to fit with the piston (201) and the dual assembly (206) with an interference fit. The material is polyurethane rubber, which realizes the function of preventing leakage of high-energy gas.

8. The leak-proof, overload-resistant miniature fuse security unlocking pin removal device according to claim 1, characterized in that, The ignition element (1) is a bridge wire, a bridge strip, or a semiconductor chip.

9. The leak-proof, overload-resistant miniature fuse security unlocking pin removal device according to claim 1, characterized in that, The gasket assembly (3) includes an inner gasket, two sealing rings, and an outer gasket, which are installed on the piston rod from the inside to the outside.

10. The leak-proof, overload-resistant miniature fuse security unlocking pin removal device according to claim 1, characterized in that, The piston (201) has a through hole in the middle.

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