Underwater pin pulling device

Abstract

The utility model relates to the field of initiating explosive devices, and discloses an underwater pin pulling device which comprises a shell, a fixing pin, a piston, a lock cover, a buffering sleeve, first sealing rings, an exploder and a one-way sealing assembly, the cross section of the piston is arranged in a shape like a Chinese character'zhong 'and is connected in an inner cavity of the shell in a sliding mode, and the peripheral side of the piston is sleeved with the first sealing rings; the working end of the fixing pin is connected with the piston in an inserted mode, two air guide channels are reserved in the piston, the exploder is in threaded connection to the bottoms of the air guide channels, the one-way sealing assembly is in threaded connection to the tops of the air guide channels, the small-diameter end of the bottom of the piston is sleeved with the buffering sleeve, and the outer wall of the buffering sleeve is arranged in a taper angle mode. The lock cover is in threaded connection with the opening end of the bottom of the shell, a circular-truncated-cone-shaped groove is formed in the lock cover, and the large-diameter size of the circular-truncated-cone-shaped groove is matched with the small-diameter size of the buffering sleeve. The waterproof performance of the device is effectively improved, and meanwhile, the stable operation of the device is ensured by adopting the arrangement of the double exploders.

Description

Technical Field

[0001] The utility model relates to the field of initiator devices, in particular to an underwater pin pulling device. Background Art

[0002] Modern underwater weapons such as the separation and throwing of unmanned underwater vehicles, torpedoes, and self-propelled naval mines need to perform various actions during the launching process. These actions usually need to be achieved by means such as motor drive or hydraulic drive. Among them, the motor drive method drives the motor through a control signal to complete specific functions, requires a supporting DC or AC power supply, occupies a large volume, and has a slow action execution speed and low reliability. The hydraulic drive requires a hydraulic working system, with a complex structure and high cost. With the progress of technology, the sonar detection technology has developed rapidly, putting forward higher requirements for the mobility and concealment performance of underwater weapon equipment. The above action execution methods can no longer meet the development trend of the miniaturization and agility of future underwater weapons.

[0003] Therefore, how to provide an underwater pin pulling device that effectively improves the waterproof performance of the device and, at the same time, adopts a double detonator setting to ensure the stable operation of the device has become a technical problem that needs to be solved urgently by those skilled in the art. Content of the Utility Model

[0004] The purpose of the utility model is to provide an underwater pin pulling device that effectively improves the waterproof performance of the device and, at the same time, adopts a double detonator setting to ensure the stable operation of the device.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An underwater pin pulling device of the utility model includes a housing, a fixed pin, a piston, a lock cover, a buffer sleeve, a first sealing ring, a detonator, and a one-way sealing component. The inside of the housing is provided with a cavity that is open at both the top and bottom. The cross-section of the piston is in a Chinese character "zhong" shape and is slidably connected in the inner cavity of the housing. Multiple groups of the first sealing rings are sleeved on the outer peripheral side of the piston, and the first sealing rings are closely fitted with the inner wall of the housing. Multiple fixed pins are arranged in a ring on the housing, and the working end of the fixed pin is inserted and connected with the piston. Two air guiding channels are reserved inside the piston. The number of the detonators and the one-way sealing components both matches the number of the air guiding channels. The detonator is threadedly connected to the bottom of the air guiding channel, and the one-way sealing component is threadedly connected to the top of the air guiding channel. The buffer sleeve is sleeved on the small-diameter end at the bottom of the piston, and the outer wall of the buffer sleeve is provided with a taper angle. The lock cover is threadedly connected to the open end at the bottom of the housing, and a frustum-shaped groove is arranged inside the lock cover. The large-diameter dimension of the frustum-shaped groove matches the small-diameter dimension of the buffer sleeve.

[0007] Preferably, the housing is provided with external threads for connection with weapon equipment.

[0008] Preferably, a second sealing ring is fitted on the outside of the housing, and a first rubber sealing gasket is fitted on the top of the boss at the bottom of the housing.

[0009] Preferably, a second rubber sealing gasket is sandwiched between the lock cover and the open end at the bottom of the housing.

[0010] Preferably, the upper end of the piston extends outward after passing through the top opening of the housing.

[0011] Preferably, the air guide channel is configured with a variable diameter.

[0012] Preferably, the one-way sealing assembly includes an end cap, a spring, and a sealing block. The end cap is threaded to the top of the air guide channel and has a vent hole. One end of the spring is fixedly connected to the bottom of the end cap, and the other end of the spring is fixedly connected to the top of the sealing block. The bottom of the sealing block abuts against the bottom of the large-diameter section of the air guide channel.

[0013] Preferably, a rubber pad layer is adhered to the bottom of the sealing block.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] This utility model discloses an underwater pin-pulling device, which can effectively improve the waterproof performance of the device. At the same time, it uses dual detonators as the operating energy source of the device. The two detonators are independent of each other. When either detonator is working properly, it can drive the piston to move downward to complete the pin-pulling operation, which effectively improves the stability and reliability of the device operation. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a cross-sectional view of the overall structure of an underwater pin-pulling device according to the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Fixing pin; 3. Piston; 301. Gas guide channel; 4. Locking cover; 401. Frustum-shaped groove; 5. Buffer sleeve; 6. First sealing ring; 7. Detonator; 8. One-way sealing assembly; 801. End cap; 802. Spring; 803. Sealing block; 9. Second sealing ring; 10. First rubber sealing gasket; 11. Second rubber sealing gasket. Detailed Implementation

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0020] As Figure 1 shown, an underwater pin pulling device includes a housing 1, a fixed pin 2, a piston 3, a lock cover 4, a buffer sleeve 5, a first sealing ring 6, a detonator 7 and a one-way sealing component 8. The inside of the housing 1 is provided with a cavity opening up and down. The cross-section of the piston 3 is in a middle shape and is slidably connected in the inner cavity of the housing 1. Multiple groups of the first sealing rings 6 are sleeved on the outer peripheral side of the piston 3, and the first sealing rings 6 are closely fitted with the inner wall of the housing 1. Multiple fixed pins 2 are arranged in a ring on the housing 1, and the working end of the fixed pin 2 is inserted and connected with the piston 3. Two air guiding channels 301 are reserved inside the piston 3, and the air guiding channels 301 and the top of the inner cavity of the housing 1 form an initial cavity. The numbers of the detonator 7 and the one-way sealing component 8 both match the number of the air guiding channels 301. The detonator 7 is threadedly connected to the bottom of the air guiding channel 301, and the one-way sealing component 8 is threadedly connected to the top of the air guiding channel 301. The buffer sleeve 5 is sleeved on the small-diameter end at the bottom of the piston 3, and the outer wall of the buffer sleeve 5 is provided with a taper angle. The lock cover 4 is threadedly connected to the open end at the bottom of the housing 1, and a frustum-shaped groove is provided inside the lock cover 4. The large-diameter dimension of the frustum-shaped groove 401 matches the small-diameter dimension of the buffer sleeve 5.

[0021] Specifically, the present utility model uses two detonators 7 as the operating energy source of the device. The two detonators 7 are independent of each other. Any one of the detonators 7 can drive the piston 3 to move downward to complete the pin pulling operation when it works normally, effectively improving the stability and reliability of the device operation.

[0022] Specifically, an external thread for connecting with weapon equipment is provided on the housing 1.

[0023] Specifically, a second sealing ring 9 is sleeved outside the housing 1, and a first rubber sealing pad 10 is sleeved above the boss at the bottom of the housing 1.

[0024] Specifically, the settings of the second sealing ring 9 and the first rubber sealing pad 10 play a dual protection role in the axial and radial directions, and can effectively prevent seawater from entering the inside of the device.

[0025] Specifically, a second rubber sealing pad 11 is clamped between the lock cover 4 and the open end at the bottom of the housing 1.

[0026] Specifically, the upper end of the piston 3 extends outward after penetrating the top opening of the housing 1.

[0027] Specifically, two fixing pins 2 pass through the side wall of the housing 1 and are inserted into the piston 3, which can limit the starting position of the piston 3. In addition, the inner wall of the housing 1 and the piston 3 are sealed by multiple first sealing rings 6, which can prevent seawater from seeping in and causing the detonator 7 to fail, and also prevent the leakage of gunpowder gas after the detonator 7 is working.

[0028] Specifically, the locking cover 4 and the buffer sleeve 5 constitute a locking device, which is used to lock the piston 3 after it has moved into position. The buffer sleeve 5 is made of copper and is fitted onto the small-diameter end of the piston 3 with an interference fit.

[0029] Specifically, this utility model adopts a gunpowder reverse drive structure. The gunpowder gas in the detonator 7 flows upward into the initial cavity through the gas guide channel 301 of the piston 3. As the gas pressure increases, the piston 3 is driven to move downward to complete the pin removal.

[0030] Specifically, the piston 3 is made of high-strength stainless steel and undergoes heat treatment to improve its hardness. The other metal parts are made of aluminum alloy and undergo anodizing treatment to improve their corrosion resistance in seawater environment. The first sealing ring 6 and the second sealing ring 9 are made of waterproof, wear-resistant and corrosion-resistant silicone material. Before the piston 3 is activated, it is limited by the fixing pin 2. Under the drive of gunpowder, it begins to move. Since the outer diameter of the buffer sleeve 5 is larger than the bottom hole diameter of the frustum-shaped groove 401, the two collide as the piston 3 moves downward. The buffer sleeve 5 deforms under the collision and is interference-fitted with the frustum-shaped groove 401 to lock the piston 3 and prevent rebound.

[0031] Specifically, the air guide channel 301 is configured with a variable diameter.

[0032] Specifically, the one-way sealing assembly 8 includes an end cap 801, a spring 802, and a sealing block 803. The end cap 801 is threaded to the top of the air guide channel 301 and has a vent hole. One end of the spring 802 is fixedly connected to the bottom of the end cap 801, and the other end of the spring 802 is fixedly connected to the top of the sealing block 803. The bottom of the sealing block 803 abuts against the bottom of the large-diameter section of the air guide channel 301.

[0033] Specifically, a rubber pad layer is attached to the bottom of the sealing block 803.

[0034] Specifically, the diameter of the sealing block 803 is smaller than the aperture of the large-diameter section of the air guide channel 301.

[0035] Specifically, the outer diameter of spring 802 matches the orifice size of the large-diameter section of air guide channel 301.

[0036] Specifically, when the detonator 7 is not in operation, the sealing block 803, under the elastic action of the spring 802, always abuts against the opening at the bottom of the large-diameter end of the gas channel 301. At the same time, the rubber pad layer can enhance the sealing of the gas channel 301, preventing seawater that has seeped into the device from contacting the detonator 7 through the gas channel 301, further improving the waterproof performance of the device. When the detonator 7 is in operation, the high-temperature and high-pressure gas it generates flows upward along the gas channel 301. The sealing block 803 will move upward under the action of the gas and compress the spring 802, thereby making the gas channel 301 unobstructed.

[0037] The working principle of this utility model is as follows:

[0038] The detonator is powered by a DC power supply. During operation, the explosive charge in the detonator 7 burns rapidly, instantly generating a large amount of high-temperature and high-pressure gas. The gas enters the reserved initial cavity upward through the gas guide channel 301 on the piston 3. The gas expands and does work, cutting off the fixing pin 2 and releasing the piston 3 from its limit. The piston 3 is pushed downward to continue moving. After reaching the predetermined detonation stroke, the buffer sleeve 5 and the locking cover 4 lock the piston 3 through an interference fit, absorbing excess energy and converting the kinetic energy of the piston 3 into the deformation energy of the buffer sleeve 5, preventing the piston 3 from rebounding.

[0039] 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.

[0040] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An underwater pin pulling device, characterized by: The utility model provides a shell (1), fixed pin (2), piston (3), lock cover (4), buffer sleeve (5), first sealing ring (6), initiator (7) and one-way sealing assembly (8), the inside of shell (1) is arranged as the cavity of up and down opening, the cross section of piston (3) is arranged and is connected in the inner chamber of shell (1) with sliding, and a plurality of first sealing ring (6) is set in the outer circumferential side of piston (3), and first sealing ring (6) is tightly attached with the inner wall of shell (1), a plurality of fixed pin (2) is arranged in annular on shell (1), and the working end of fixed pin (2) is inserted with piston (3) and connects, and the inside of piston (3) is reserved with two gas guide channel (301), and the number of initiator (7), one-way sealing assembly (8) is matched with the number of gas guide channel (301), and initiator (7) is screwed in the bottom of gas guide channel (301), and one-way sealing assembly (8) is screwed in the top of gas guide channel (301), and buffer sleeve (5) is set in the small diameter end of the bottom of piston (3), and the outer wall of buffer sleeve (5) is arranged with taper angle, and lock cover (4) is screwed in the open end of the bottom of shell (1), and the inside of lock cover (4) is provided with circular truncated cone recess, and the large diameter size of circular truncated cone recess (401) is matched with the small diameter size of buffer sleeve (5).

2. A pin puller device according to claim 1, wherein: The shell (1) is provided with external threads for connecting with weapons.

3. A pin puller device according to claim 2, wherein: The shell (1) is provided with a second sealing ring (9) on the outside.

4. A pin puller device according to claim 3, wherein: The lock cover (4) and the open end of the bottom of the shell (1) are clamped with a second rubber sealing gasket (11).

5. A pin puller device according to claim 4, wherein: The upper end of the piston (3) extends outward after penetrating the top opening of the shell (1).

6. The underwater pin puller of claim 1, wherein: The gas guide channel (301) is arranged with variable diameter.

7. The underwater pin puller of claim 6, wherein: The one-way sealing assembly (8) includes an end cover (801), a spring (802), and a sealing block (803). The end cover (801) is screwed on the top of the gas guide channel (301), and the end cover (801) is provided with a gas permeable hole. One end of the spring (802) is fixedly connected to the bottom of the end cover (801), and the other end of the spring (802) is fixedly connected to the top of the sealing block (803). The bottom of the sealing block (803) abuts against the bottom of the large-diameter section of the gas guide channel (301).

8. The underwater pin puller of claim 7, wherein: A rubber pad layer is attached to the bottom of the sealing block (803).

Images