An explosive bolt sealing device

Abstract

The application discloses an explosive bolt sealing device. The device comprises a connecting rod, an electric detonation tube, an electric cable, a rubber pad and a charging chamber. The connecting rod is provided with a first wire hole and a pressure reduction cavity. The first wire hole is communicated with the pressure reduction cavity. The electric detonation tube is provided with a plurality of wires on one end. The wires are arranged at intervals. The electric cable is connected with all the wires through the first wire hole and the pressure reduction cavity. The rubber pad is arranged between the pressure reduction cavity and the electric detonation tube, and a plurality of second wire holes are formed in the rubber pad. The second wire holes are arranged in one-to-one correspondence with the wires. One end of the charging chamber is an annular groove, and the other end is a T-shaped frame. The annular groove is a longitudinal structure. The annular groove surrounds the electric detonation tube, the rubber pad and the connecting rod in sequence. The second wire holes are arranged on the rubber pad, so that the wires are also sealed by the rubber pad. When the annular groove and the T-shaped frame are separated, water flow is prevented from entering the internal control circuit of the vehicle along the electric cable, so that the circuit is damaged.

Description

Technical Field

[0001] This invention relates to the field of explosive bolt technology, and more specifically, to an explosive bolt sealing device. Background Technology

[0002] The rapid development of underwater vehicle technology necessitates various explosive release bolts with extremely high reliability requirements. Existing explosive release bolts typically consist of a cable, connecting rod, explosive chamber, gasket, rubber pad, and electric detonator. The connecting rod has a wire-passing hole, and multiple wires are spaced at intervals on one end of the electric detonator. The cable passes through the wire-passing hole and connects to all the wires. All the wires are surrounded by rubber pads, but these pads do not seal the gaps between the wires. One end of the explosive chamber is an annular groove, and the other end is a T-shaped frame. The annular groove has a longitudinal structure and sequentially surrounds the electric detonator, rubber pad, and connecting rod. During deep-water ignition tests, when the electric detonator ignites and explodes, the high-pressure gas generated inside the detonator leaks from the connection between the connecting rod and the charging chamber, or the cable is blown out from the cable passage hole of the connecting rod. This leads to insufficient gas pressure inside the electric detonator cavity, preventing the explosive bolt from breaking and causing malfunction. Additionally, when the electric detonator ignites and explodes, the annular groove and the T-shaped frame are broken off, and the electric detonator is destroyed. Water flows in along the annular groove and enters the cable through the gaps between multiple wires, eventually entering the vehicle's control circuit and causing circuit damage.

[0003] There are currently no effective solutions to the problems in existing technologies, such as unreliable sealing of explosive bolts preventing them from breaking, and water entering the vehicle's control circuitry under water pressure after the explosive bolts break during deep-water testing (i.e., after the annular groove separates from the T-frame), causing water to enter sequentially along the annular groove, the gaps between multiple wires, and the cable, thus damaging the circuitry. Summary of the Invention

[0004] This invention provides an explosive bolt sealing device to solve the problems in the prior art where unreliable sealing of the explosive bolt prevents it from breaking, and where, after the explosive bolt breaks in a deep-water test (i.e., after the annular groove separates from the T-frame), water pressure causes water to enter the vehicle's control circuit through the annular groove, the gaps between multiple wires, and the cable, thereby damaging the circuit.

[0005] To achieve the above objectives, the present invention provides an explosive bolt sealing device, comprising: a connecting rod having a first wire passage hole and a pressure-reducing cavity therein; the first wire passage hole communicating with the pressure-reducing cavity; an electric detonating tube having multiple wires at one end; the multiple wires being spaced apart; a cable passing through the first wire passage hole and connecting to all the wires passing through the pressure-reducing cavity; a rubber pad disposed between the pressure-reducing cavity and the electric detonating tube, the rubber pad having multiple second wire passage holes corresponding one-to-one with the multiple wires; and a loading chamber having an annular groove at one end and a T-shaped frame at the other end; the annular groove having a longitudinally elongated structure; the annular groove sequentially surrounding the electric detonating tube, the rubber pad, and the connecting rod.

[0006] Optionally, a sealing groove is provided on the outer side wall of the connecting rod, and the sealing groove is located between the connecting rod and the loading chamber; an O-ring is provided on the sealing groove.

[0007] Optionally, it also includes: a first gasket; the first gasket is disposed between the pressure relief chamber and the rubber gasket; a plurality of third wire passage holes are provided on the first gasket; the plurality of third wire passage holes are provided one-to-one with the plurality of wires.

[0008] Optionally, it also includes: a second gasket; the second gasket is disposed between the rubber pad and the electric detonation tube; a plurality of fourth wire passage holes are provided on the second gasket; the plurality of fourth wire passage holes are provided one-to-one with the plurality of wires.

[0009] Optionally, a propellant for generating gas is provided inside the electric detonation tube. When the electric detonation tube is ignited and explodes, the propellant generates high-pressure gas and inputs it into the decompression chamber.

[0010] Optionally, the rubber pad includes a first connecting part and a second connecting part that are fixedly connected; the first connecting part has a frustum-shaped structure and the second connecting part has a cylindrical structure; the diameter of the first end face of the first connecting part is greater than the diameter of the second end face of the first connecting part; the diameter of the second end face of the first connecting part is equal to the diameter of the first end face of the second connecting part.

[0011] Optionally, the first end face of the first connecting portion is connected to the first gasket; the second end face of the first connecting portion is connected to the first end face of the second connecting portion; and the second end face of the second connecting portion is connected to the second gasket.

[0012] Optionally, limiting ears are provided at both ends of the first gasket to prevent the first gasket from rotating when the connecting rod is tightened to the loading chamber.

[0013] Optionally, a connector is provided on the cable, the connector being located within the vehicle control circuit.

[0014] Optionally, the surface of the annular groove that contacts the T-shaped frame is the blast fracture surface. When the electric detonator is ignited and explodes, the charging chamber breaks along the blast fracture surface to separate the annular groove from the T-shaped frame.

[0015] The beneficial effects of this invention are:

[0016] This invention provides an explosive bolt sealing device. This device includes a pressure-reducing chamber and an O-ring seal on the outer wall of the connecting rod. When the explosive tube explodes, the high-pressure gas generated is prevented from leaking from the connection between the connecting rod and the loading chamber by the O-ring seal. Furthermore, the pressure drops dramatically as the high-pressure gas passes through the pressure-reducing chamber, thus reducing pressure and minimizing damage to the O-ring seal. Multiple second wire passage holes are provided on the rubber pad, each corresponding to a specific wire, ensuring that there are also rubber pads sealing between the wires. This solves the problem that after the explosive bolt breaks during a deep-water test (i.e., the annular groove separates from the T-frame), water pressure causes water to enter the vehicle's control circuit through the annular groove, the gaps between the wires, and the cable, damaging the circuit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an explosive bolt sealing device provided in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the rubber pad provided in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the first gasket provided in an embodiment of the present invention.

[0020] Symbol explanation:

[0021] Connecting rod-1, electric detonator-2, cable-3, rubber pad-4, loading chamber-5, first gasket-6, second gasket-7, O-ring seal-8, first wire hole-11, pressure relief chamber-12, connector-31, second wire hole-41, annular groove-51, T-frame-52, blasted section-53, limiting lug-61. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0023] In the existing technology, commonly used explosive release bolts mainly consist of a cable 3, a connecting rod 1, a loading chamber 5, a gasket, a rubber pad 4, and an electric detonator. The connecting rod 1 has a wire-passing hole, and multiple wires are installed at intervals on one end of the electric detonator. The cable 3 passes through the wire-passing hole and connects to all the wires. All the wires are surrounded by a rubber pad 4, but the rubber pad 4 does not seal the gaps between the wires. One end of the loading chamber 5 is an annular groove 51, and the other end is a T-shaped frame 52. The annular groove 51 has a longitudinally elongated structure and sequentially surrounds the electric detonator, the rubber pad 4, and the connecting rod 1. During deep-water ignition tests, when the electric detonator ignites and explodes, the high-pressure gas generated inside the electric detonator leaks from the connection between the connecting rod 1 and the charging chamber 5, or the cable 3 is blown out from the wire hole of the connecting rod 1. This leads to insufficient gas pressure inside the electric detonator cavity, preventing the explosion bolt from breaking and causing functional failure. Additionally, when the electric detonator ignites and explodes, the annular groove 51 and the T-shaped frame 52 are broken and separated, and the electric detonator is destroyed. Water flows in along the annular groove 51 and enters the cable 3 through the gaps between multiple wires, eventually entering the vehicle's control circuit and causing circuit damage.

[0024] Therefore, the present invention provides an explosive bolt sealing device. Figure 1 This is a structural schematic diagram of an explosion bolt sealing device provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the device includes:

[0025] The connecting rod 1 is provided with a first wire passage hole 11 and a pressure reducing cavity 12; the first wire passage hole 11 communicates with the pressure reducing cavity 12.

[0026] Specifically, in this invention, the connecting rod 1 has a cylindrical structure. Inside the connecting rod 1 and at its center, there is a first wire-passing hole 11 and a pressure-reducing cavity 12. The diameter of the first wire-passing hole 11 is smaller than the width of the pressure-reducing cavity 12, and the length of the first wire-passing hole 11 is greater than the length of the pressure-reducing cavity 12. The first wire-passing hole 11 communicates with the pressure-reducing cavity 12, and the first wire-passing hole 11 penetrates one end face of the connecting rod 1, while the pressure-reducing cavity 12 penetrates the other end face of the connecting rod 1.

[0027] In an optional embodiment, the explosive bolt sealing device further includes: an electric detonating tube 2, with multiple wires disposed at one end of the electric detonating tube 2; the multiple wires are spaced apart;

[0028] In an optional embodiment, the explosive bolt sealing device further includes: a cable 3, which passes through the first wire hole 11 and is connected to all the wires passing through the pressure relief chamber 12;

[0029] Specifically, in this invention, the cable 3 passes through the first wire hole 11, and the multiple wires connected to the electric detonator 2 pass through the pressure reducing cavity 12; the cable 3 passing through the first wire hole 11 is connected to all the wires passing through the pressure reducing cavity 12.

[0030] In an optional embodiment, the explosive bolt sealing device further includes: a rubber pad 4, which is disposed between the pressure reducing chamber 12 and the electric detonation tube 2, and the rubber pad 4 is provided with a plurality of second wire passage holes 41, which are respectively provided with the plurality of wire passage holes 41 corresponding to the plurality of wires.

[0031] Specifically, Figure 2 This is a schematic diagram of the structure of the rubber pad 4 provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the rubber pad 4 includes a first connecting part and a second connecting part that are fixedly connected; the first connecting part has a frustum-shaped structure, and the second connecting part has a cylindrical structure; the diameter of the first end face of the first connecting part is larger than the diameter of the second end face of the first connecting part; the diameter of the second end face of the first connecting part is equal to the diameter of the first end face of the second connecting part. The diameter of the second connecting part is larger than the diameter of the electric detonator 2. Multiple through-holes 41 are provided on the first and second connecting parts, and multiple wires pass through the multiple through-holes 41 one by one; the inner surface of the second through-hole 41 is in contact with the outer surface of the wire, thus ensuring that there are no gaps between all the wires and that they are all sealed by the rubber pad 4.

[0032] In an optional embodiment, the explosive bolt sealing device further includes: a first gasket 6; the first gasket 6 is disposed between the pressure relief chamber 12 and the rubber gasket 4; a plurality of third wire passage holes are provided on the first gasket 6; the plurality of third wire passage holes are provided one-to-one with the plurality of wires.

[0033] In an optional embodiment, the explosive bolt sealing device further includes: a second gasket 7; the second gasket 7 is disposed between the rubber gasket 4 and the electric detonating tube 2; a plurality of fourth wire passage holes are provided on the second gasket 7; the plurality of fourth wire passage holes are provided one-to-one with the plurality of wires.

[0034] In this invention, the first wire hole 11, the pressure reducing chamber 12, the first gasket 6, the rubber gasket 4, the second gasket 7, and the electric detonation tube 2 are arranged in a specific configuration.

[0035] In an optional embodiment, the explosive bolt sealing device further includes: a charging chamber 5, one end of which is an annular groove 51 and the other end is a T-shaped frame 52; the annular groove 51 is a longitudinally elongated structure; the annular groove 51 sequentially surrounds the electric detonating tube 2, the second gasket 7, the rubber gasket 4, the first gasket 6, and the connecting rod 1.

[0036] Specifically, the surface where the annular groove 51 contacts the T-shaped frame 52 is the blast fracture surface 53 (where only the annular groove 51 and the T-shaped frame 52 are partially connected). When the electric detonator 2 is ignited and explodes, the charging chamber 5 breaks along the blast fracture surface 53 (i.e., the connection between the annular groove 51 and the T-shaped frame 52 is broken), thus separating the annular groove 51 from the T-shaped frame 52. Furthermore, the electric detonator 2 itself is also destroyed. In this invention, the interior of the annular groove 51 is hollow, and both ends of the annular groove 51 are open. The electric detonator 2 passes through one end of the annular groove 51, and a portion of the connecting rod 1 passes through the other end of the annular groove 51. The rubber pad 4 is located between the connecting rod 1 and the electric detonator 2, the first gasket 6 is located between the rubber pad 4 and the connecting rod 1, and the second gasket 7 is located between the rubber pad 4 and the electric detonator 2.

[0037] Specifically, the first end face of the first connecting portion of the rubber pad 4 is connected to the first gasket 6; the second end face of the first connecting portion of the rubber pad 4 is connected to the first end face of the second connecting portion of the rubber pad 4; and the second end face of the second connecting portion of the rubber pad 4 is connected to the second gasket 7. By setting the first gasket 6 and the second gasket 7, the connecting rod 1 and the electric detonating tube 2 can be protected, preventing the rigid connection from damaging the connecting rod 1 and the electric detonating tube 2.

[0038] Furthermore, the rubber gasket 4 is designed with a tapered shape and adopts a wedge seal (i.e., the first connecting part is a frustum-shaped structure, which increases the radial width compared to the first and second connecting parts being cylindrical structures with equal diameters). During the production and assembly of the explosion bolt, as well as after the explosion bolt is ignited, the high-pressure gas generated will cause the rubber gasket 4 to be pressed tighter and tighter, thus increasing the sealing effect of the rubber gasket 4.

[0039] In an optional embodiment, the third wire passage hole, the second wire passage hole 41, and the fourth wire passage hole are correspondingly arranged and sequentially connected, so that the wires on the electric detonator 2 pass through the fourth wire passage hole, the second wire passage hole 41, and the third wire passage hole in sequence, and pass through the pressure reducing cavity 12 to connect with the cable 3 that passes through the first wire passage hole 11.

[0040] In an optional embodiment, a connector 31 is provided on the cable 3, and the connector 31 is located within the vehicle control circuit. Specifically, the connector 31 is located outside the connecting rod 1.

[0041] In this invention, by setting rubber pad 4, first gasket 6, and second gasket 7, and by correspondingly setting second wire passage hole 41, third wire passage hole, and fourth wire passage hole, the problem in the prior art that after the explosive bolt breaks in the deep-water test (i.e., the annular groove 51 separates from the T-shaped frame 52), water is forced to enter the vehicle control circuit through the annular groove 51, the gaps between multiple wires, and the cable 3 under water pressure, thus damaging the circuit, can be solved. When the explosive bolt breaks in the deep-water test (i.e., the annular groove 51 separates from the T-shaped frame 52), and the electric detonator 2 is also blown away, water enters the annular groove 51 under water pressure. However, the rubber pad 4 between the multiple wires blocks the water flow, preventing water from entering the vehicle control circuit.

[0042] In an optional embodiment, a sealing groove is provided on the outer side wall of the connecting rod 1, and the sealing groove is located between the connecting rod 1 and the loading chamber 5; an O-ring seal 8 is provided on the sealing groove.

[0043] Specifically, the connecting rod 1 is threadedly connected to the annular ring, and the sealing ring is located between the connecting rod 1 and the annular groove 51; an O-ring 8 is provided on the sealing groove.

[0044] In an optional embodiment, a propellant for generating gas is provided inside the electric detonator 2. When the electric detonator 2 is ignited and explodes, the propellant generates high-pressure gas and is introduced into the decompression chamber 12.

[0045] In this invention, by adding an O-ring seal 8, leakage of high-pressure gas generated by the electric detonator 2 from the threaded connection between the connecting rod 1 and the annular groove 51 can be prevented after the electric detonator 2 ignites and explodes. Furthermore, by providing a pressure-reducing chamber 12, the high-pressure gas generated by the electric detonator 2 can be instantly reduced in pressure after passing through the relatively large chamber 12, thus reducing pressure and minimizing damage to the O-ring seal 8, as well as the direct seal between the cable 3 and the connecting rod 1.

[0046] In one optional implementation, Figure 3This is a schematic diagram of the structure of the first gasket 6 provided in an embodiment of the present invention, as shown below. Figure 3 As shown, limit ears 61 are provided at both ends of the first gasket 6 to prevent the first gasket 6 from rotating when the connecting rod 1 is tightened to the loading chamber 5.

[0047] Furthermore, in this invention, before loading the explosive into the electric detonator 2, the connector 31 on the cable 3 is welded in advance. Then, the cable 3 is passed through the connecting rod 1, the first gasket 6, the rubber gasket 4, and the second gasket 7 before loading the explosive. This can avoid the risk of ignition of the electric detonator 2 when the original explosive bolt is welded to the connector 31.

[0048] The beneficial effects of this invention are:

[0049] This invention provides an explosive bolt sealing device. The device includes a pressure-reducing chamber 12 and an O-ring seal 8 on the outer wall of the connecting rod 1. When the electric detonator 2 explodes, the high-pressure gas generated is prevented from leaking from the connection between the connecting rod 1 and the loading chamber 5 by the O-ring seal 8. Furthermore, the pressure drops dramatically as the high-pressure gas passes through the pressure-reducing chamber 12, reducing pressure and minimizing damage to the O-ring seal 8. Multiple second wire holes 41 are provided on the rubber pad 4, each corresponding to a specific wire, ensuring that the wires are also sealed by the rubber pad 4. This solves the problem that after the explosive bolt breaks during a deep-water test (i.e., the annular groove 51 separates from the T-frame 52), water pressure causes water to enter the vehicle's control circuit along the annular groove 51, the gaps between the wires, and the cable 3, damaging the circuit. By adding a tapered design to the rubber pad 4 and using a wedge seal, the high-pressure gas generated during production and assembly of the explosive bolt, as well as after ignition, compresses the rubber pad 4, increasing its sealing effect.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An explosive bolt sealing device, characterized in that, include: A connecting rod is provided with a first wire passage hole and a pressure reducing cavity; the first wire passage hole communicates with the pressure reducing cavity; An electric detonator, with multiple wires installed at one end; the multiple wires are spaced apart. A cable, which passes through the first wire hole and is connected to all the wires passing through the pressure-reducing cavity; A rubber pad is disposed between the pressure reducing chamber and the electric detonation tube, and the rubber pad is provided with a plurality of second wire passage holes, which are respectively provided with a plurality of wire passage holes corresponding to a plurality of wires; The explosive loading chamber has an annular groove at one end and a T-shaped frame at the other end; the annular groove has a longitudinally elongated structure; the annular groove sequentially surrounds the electric detonating tube, the rubber pad, and the connecting rod; The electric detonator contains a propellant for generating gas. When the electric detonator is ignited and explodes, the propellant generates high-pressure gas, which is then introduced into the pressure-reducing chamber. The rubber pad includes a first connecting part and a second connecting part that are fixedly connected; the first connecting part has a frustum-shaped structure and the second connecting part has a cylindrical structure; The diameter of the first end face of the first connecting portion is greater than the diameter of the second end face of the first connecting portion; the diameter of the second end face of the first connecting portion is equal to the diameter of the first end face of the second connecting portion. A sealing groove is provided on the outer side wall of the connecting rod, and the sealing groove is located between the connecting rod and the loading chamber; an O-ring is provided on the sealing groove.

2. The apparatus according to claim 1, characterized in that, It also includes: the first gasket; The first gasket is disposed between the pressure relief chamber and the rubber gasket; a plurality of third wire holes are provided on the first gasket; the plurality of third wire holes are provided one-to-one with the plurality of wires.

3. The apparatus according to claim 2, characterized in that, Also includes: Second gasket; The second gasket is disposed between the rubber pad and the electric detonation tube; a plurality of fourth wire passage holes are provided on the second gasket; Each of the plurality of fourth wire holes is provided in a one-to-one correspondence with the plurality of wires.

4. The apparatus according to claim 3, characterized in that: The first end face of the first connecting part is connected to the first gasket; the second end face of the first connecting part is connected to the first end face of the second connecting part; and the second end face of the second connecting part is connected to the second gasket.

5. The apparatus according to claim 2, characterized in that: Limiting ears are provided at both ends of the first gasket to prevent the first gasket from rotating when the connecting rod is tightened to the loading chamber.

6. The apparatus according to claim 1, characterized in that: A connector is provided on the cable, and the connector is located within the vehicle control circuit.

7. The apparatus according to claim 1, characterized in that: The surface in contact with the annular groove and the T-shaped frame is the blast fracture surface. When the electric detonator is ignited and explodes, the charging chamber breaks along the blast fracture surface to separate the annular groove from the T-shaped frame.

Images