An unlocking telemetry device for an explosive bolt

Abstract

The present invention relates to an unlocking telemetry device for an explosive bolt, which includes a locking pin assembly and a locking hole assembly that can be plugged or disconnected. In the initial state, the unlocking telemetry device for the explosive bolt is connected to both sides of the separation surface of the explosive bolt through a mounting bracket, and the locking pin assembly and the locking hole assembly are in a compressed state. When the explosive bolt breaks at the separation surface and continues to move to both sides under the action of the residual separation impulse, the explosive bolt drives the locking pin assembly and the locking hole assembly to move to both sides respectively until the passage state of the locking pin assembly and the locking hole assembly is disconnected. Whether the explosive bolt is unlocked is judged by remotely measuring the passage and break states of the unlocking telemetry device for the explosive bolt. The present invention judges whether the explosive bolt is unlocked by testing the on-off signal of the unlocking telemetry device, and has the advantages of vibration resistance and resistance to space environment.

Description

Technical Field

[0001] The present invention relates to a telemetry device for unlocking an explosive bolt, belonging to the technical field of aerospace explosive bolts. Background Art

[0002] Explosive bolts have the advantages of large load-bearing capacity, small volume, high reliability, and short separation time, and are widely used in the aerospace field. Explosive bolts are mainly used in vehicle stage separation, rocket-satellite separation, vehicle-rocket separation, separation between spacecrafts, payload separation, etc.

[0003] Whether the explosive bolt is unlocked determines the execution of the flight program of the space mission and even the success or failure of the space mission. It is necessary to judge whether the explosive bolt is unlocked during the space launch mission. It is impossible to observe the explosion of the explosive bolt in space through ground observation. Observation can be carried out through an instant camera, but installing a camera also requires supporting video recording, storage, and transmission equipment, which is costly. In addition, due to installation space and weight limitations, video recording equipment cannot be installed at most explosive bolt locations. Summary of the Invention

[0004] The technical problem solved by the present invention is: overcoming the deficiencies of the prior art, and proposing a telemetry device for unlocking an explosive bolt, which judges whether the explosive bolt is unlocked by testing the on-off signal of the unlocking telemetry device, and has the advantages of vibration resistance and resistance to the space environment.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] A telemetry device for unlocking an explosive bolt includes a lock pin assembly and a lock hole assembly, which can be plugged or disconnected from each other;

[0007] In the initial state, the telemetry device for unlocking the explosive bolt is connected to both sides of the separation surface of the explosive bolt through a mounting bracket, and the lock pin assembly and the lock hole assembly are in a compressed state;

[0008] When the explosive bolt breaks from the separation surface and continues to move to both sides under the action of the residual separation impulse, the explosive bolt drives the lock pin assembly and the lock hole assembly to move to both sides respectively until the on-state of the lock pin assembly and the lock hole assembly is disconnected;

[0009] Whether the explosive bolt is unlocked is judged by telemetering the on and off states of the telemetry device for unlocking the explosive bolt.

[0010] Furthermore, the lock pin assembly includes a lock pin, a first mounting bracket, a first insulating bushing, a first insulating spacer, a first locking nut, a first aviation pin, a first wire, and a first insulating heat shrinkable tube,

[0011] The threaded end of the locking pin passes through the middle hole of the first mounting bracket. One end of the locking pin is a ball head structure. The first insulating bushing separates the locking pin from the first mounting bracket. The raised part of the locking pin fits against the flanging of the first insulating bushing. The first locking nut is screwed onto the threaded part of the locking pin to connect the locking pin to the first mounting bracket. The first insulating spacer separates the first locking nut from the first mounting bracket, and the first insulating heat shrink tube separates the locking pin from the first mounting bracket. The rear end of the locking pin is welded to one end of the first wire, and the other end of the first wire is welded to the first aviation pin.

[0012] Further, the lock hole assembly includes a spring piece, a lock rod, a rivet, a second mounting bracket, a second insulating bushing, a second insulating spacer, a second locking nut, a second aviation pin, a second wire, and several second insulating heat shrink tubes.

[0013] Two spring pieces are riveted to one side of the flat plate of the lock rod by a rivet. The threaded end of the lock rod passes through the middle hole of the second mounting bracket. The second insulating bushing separates the lock rod from the second mounting bracket. The raised part of the lock rod fits against the flanging of the second insulating bushing. The second locking nut is screwed onto the threaded part of the lock rod to connect the lock rod to the second mounting bracket. The second insulating spacer separates the second locking nut from the second mounting bracket, and the second insulating heat shrink tube separates the spring piece from the second mounting bracket. The rear end of the lock rod is welded to one end of the second wire, and the other end of the second wire is welded to the second aviation pin.

[0014] Further, the locking pin assembly and the lock hole assembly are connected: the ball head at the top of the locking pin pushes open the spring piece of the lock hole. The ball head of the locking pin is at the round hole of the spring piece. The spring piece clamps the ball head of the locking pin and has a certain pressure on the ball head to ensure that the locking pin assembly and the lock hole assembly are always in contact.

[0015] Further, the locking pin, the spring piece, the lock rod, the wire, and the aviation pin form a complete conduction path. This conduction path is separated from the mounting bracket by the insulating bushing and the insulating spacer, and is insulated from the connecting bracket and the explosion bolt.

[0016] Further, the size of the ball head at the top of the locking pin is larger than the distance between the two spring pieces of the lock hole assembly. The ball head of the locking pin is placed at the round hole of the spring piece. The spring piece is in a state of opening to both sides. The spring piece clamps the ball head of the locking pin and has a certain pressure on the ball head. The locking pin and the lock hole assembly are always in contact.

[0017] Further, the middle of the locking pin is a raised flanging, the other end of the locking pin is a threaded section, and the end of the threaded section is a wire welding groove.

[0018] Further, the insulating bushing is made of insulating material, is in a ring structure, and has a ring flanging at one end.

[0019] Further, one end of the lock rod is a flat plate with two rivet holes in the middle. The middle of the lock rod is a raised flanging. The other end of the lock rod is a threaded section, and the end of the threaded section is a wire welding groove.

[0020] Furthermore, two rivet holes are opened at one end of the spring piece, a spherical hole is opened at the other end of the spring piece, and the end on the side with the spherical hole is a structure bent outward.

[0021] The beneficial effects of the present invention compared with the prior art are as follows:

[0022] (1) The explosion bolt unlocking telemetry device of the present invention is connected to the explosion bolt through the mounting bracket. The lock pin and the spring piece are in a compressed state, and the device is in a conductive state; when the explosion bolt unlocks and separates to both sides, the spherical head of the lock pin is withdrawn from the round hole of the spring piece of the lock hole assembly and disengages from the spring piece, and the conduction path is disconnected; whether the explosion bolt is unlocked is judged by remotely measuring the conductive and non-conductive states of the explosion bolt unlocking telemetry device.

[0023] (2) The explosion bolt unlocking telemetry device of the present invention adopts a compression connection method to adapt to mechanical environment conditions such as vibration, and uses materials resistant to space environment conditions to adapt to the detection of the unlocking state of the explosion bolt in the space environment. Description of the Drawings

[0024] Figure 1 is a schematic diagram of the connection state of an explosion bolt unlocking telemetry device of the present invention;

[0025] Figure 2 is a schematic diagram of the state of the lock pin assembly of the present invention;

[0026] Figure 3 is a schematic diagram of the state of the lock hole assembly of the present invention;

[0027] Figure 4 is a schematic diagram of the lock pin structure;

[0028] Figure 5 is a schematic diagram of the insulating bushing structure;

[0029] Figure 6 is a schematic diagram of the lock rod structure;

[0030] Figure 7 is a schematic diagram of the spring piece structure. Detailed Embodiments

[0031] The present invention will be further described below in conjunction with the embodiments.

[0032] An explosion bolt unlocking telemetry device, as Figure 1 shown, includes a lock pin assembly 1 and a lock hole assembly 2, which can be plugged in or disconnected;

[0033] In the initial state, the explosion bolt unlocking telemetry device is connected to both sides of the separation surface of the explosion bolt through the mounting bracket, and the lock pin assembly and the lock hole assembly are in a compressed state;

[0034] When the explosive bolt breaks at the separation surface and continues to move to both sides under the action of the residual separation impulse, the explosive bolts drive the locking pin assembly and the locking hole assembly to move to both sides respectively until the passage state of the locking pin assembly and the locking hole assembly is disconnected;

[0035] Judge whether the explosive bolt is unlocked by telemetry the on-off state of the telemetry device passage of the explosive bolt.

[0036] As Figure 2 、 4 、shown in Figure 5, the locking pin assembly 1 includes a locking pin 11, a first mounting bracket 12, a first insulating bushing 13, a first insulating spacer 14, a first locking nut 15, a first aviation pin 16, a first wire 17 and a first insulating heat shrinkable tube 18.

[0037] The threaded end of the locking pin passes through the middle hole of the first mounting bracket. One end of the locking pin is a ball head structure. The first insulating bushing separates the locking pin from the first mounting bracket, and the raised part of the locking pin fits with the flanging of the first insulating bushing; the first locking nut is screwed onto the threaded part of the locking pin to connect the locking pin with the first mounting bracket. The first insulating spacer separates the first locking nut from the first mounting bracket, and the first insulating heat shrinkable tube separates the locking pin from the first mounting bracket; the rear end of the locking pin is welded to one end of the first wire, and the other end of the first wire is welded to the first aviation pin.

[0038] As Figure 3 、 6 、shown in Figure 7, the locking hole assembly 2 includes a spring piece 21, a locking rod 22, a rivet 23, a second mounting bracket 1-2, a second insulating bushing 1-3, a second insulating spacer 1-4, a second locking nut 1-5, a second aviation pin 1-6, a second wire 1-7 and a number of second insulating heat shrinkable tubes 1-8;

[0039] Two spring pieces are riveted to one side of the flat plate of the locking rod through a rivet. The threaded end of the locking rod passes through the middle hole of the second mounting bracket. The second insulating bushing separates the locking rod from the second mounting bracket, and the raised part of the locking rod fits with the flanging of the second insulating bushing; the second locking nut is screwed onto the threaded part of the locking rod to connect the locking rod with the second mounting bracket. The second insulating spacer separates the second locking nut from the second mounting bracket, and the second insulating heat shrinkable tube separates the spring piece from the second mounting bracket; the rear end of the locking rod is welded to one end of the second wire, and the other end of the second wire is welded to the second aviation pin.

[0040] Connection between the locking pin assembly and the locking hole assembly: The ball head at the top of the locking pin pushes open the spring piece of the locking hole. The ball head of the locking pin is at the round hole of the spring piece. The spring piece clamps the ball head of the locking pin and has a certain pressure on the ball head to ensure that the locking pin assembly and the locking hole assembly are always in contact.

[0041] The locking pin, spring piece, locking rod, wire and aviation pin form a complete conduction line. This conduction line is separated from the mounting bracket through an insulating bushing and an insulating spacer, and is in an insulated state from the connecting bracket and the explosion bolt.

[0042] The ball head size at the top of the locking pin is larger than the distance between the two spring pieces of the lock hole assembly. The ball head of the locking pin is placed at the round hole of the spring piece, and the spring piece is in a state of opening to both sides. The spring piece clamps the ball head of the locking pin and has a certain pressure on the ball head. The locking pin and the lock hole assembly are always in contact.

[0043] The middle of the locking pin has a raised flange, the other end of the locking pin is a threaded section, and the end of the threaded section is a wire welding groove. The insulating bushing is made of insulating material and has an annular structure with an annular flange at one end.

[0044] One end of the locking rod is a flat plate with two rivet holes in the middle. The middle of the locking rod has a raised flange, and the other end of the locking rod is a threaded section, and the end of the threaded section is a wire welding groove.

[0045] One end of the spring piece has two rivet holes, and the other end has a spherical hole. The end of the side with the spherical hole is a structure bent outward.

[0046] Embodiment

[0047] Assembly of the locking pin assembly: The first insulating bushing passes through the middle round hole of the first mounting bracket. The flange of the first insulating bushing is attached to the first mounting bracket and fixed with 502 glue. The first insulating spacer is attached to the other side of the first mounting bracket and fixed with 502 glue. The locking pin with a threaded section passes through the middle hole of the first insulating bushing. The inner thread of the first locking nut is coated with 502 glue, and the first locking nut is screwed onto the threaded section of the locking pin and fits with the first insulating spacer. One end of the first wire is welded in the wire groove at the tail end of the locking pin, and the other end of the first wire is welded to the first aviation pin. An insulating heat shrinkable tube is sleeved on the welding part of the first wire and the locking pin, and is heat shrunk and fixed.

[0048] Assembly of the lock hole assembly: Two spring pieces are riveted to one side of the flat plate of the locking rod through rivets. The second insulating bushing passes through the middle round hole of the second mounting bracket. The flange of the second insulating bushing is attached to the second mounting bracket and fixed with 502 glue. The second insulating spacer is attached to the other side of the second mounting bracket and fixed with 502 glue. The locking rod with a threaded section passes through the middle hole of the second insulating bushing. The inner thread of the second locking nut is coated with 502 glue, and the second locking nut is screwed onto the threaded section of the locking rod and fits with the second insulating spacer. One end of the second wire is welded in the wire groove at the tail end of the locking rod, and the other end of the second wire is welded to the second aviation pin. A second insulating heat shrinkable tube is sleeved on the welding part of the second wire and the locking rod, and is heat shrunk and fixed. A second heat shrinkable tube is sleeved on the riveting part of the spring piece and the locking rod, and heat shrinking is carried out at the riveting part. A certain length of the second heat shrinkable tube is reserved without heat shrinking.

[0049] The explosion bolt unlocking telemetry device of the present invention is connected to the explosion bolt through a mounting bracket. The locking pin and the spring piece are in a compressed state, and the device is in a conductive state. When the explosion bolt unlocks and separates to both sides, the spherical head of the locking pin is withdrawn from the round hole of the spring piece of the locking hole assembly and disengages from the spring piece, and the conduction path is disconnected. Whether the explosion bolt is unlocked is judged by remotely measuring the conductive and non-conductive states of the explosion bolt unlocking telemetry device.

[0050] The explosion bolt unlocking telemetry device of the present invention adopts a compression connection method to adapt to mechanical environment conditions such as vibration, and uses materials resistant to space environment conditions to adapt to the detection of the unlocking state of the explosion bolt in the space environment.

[0051] Although the present invention has been disclosed above with preferred embodiments, it is not used to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and decorations made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention all belong to the protection scope of the technical solution of the present invention.

Claims

1. An unlocking telemetry device for an explosive bolt, characterized in that, It includes a locking pin assembly (1) and a locking hole assembly (2), which can be plugged in or disconnected from each other; The locking pin assembly (1) includes a locking pin (11), a first mounting bracket (12), a first insulating bushing (13), a first insulating spacer (14), a first locking nut (15), a first aviation pin (16), a first wire (17) and a first insulating heat shrinkable sleeve (18). The threaded end of the locking pin passes through the middle hole of the first mounting bracket. One end of the locking pin is a ball head structure. The first insulating bushing separates the locking pin from the first mounting bracket, and the protruding part of the locking pin fits with the flanging of the first insulating bushing; The first locking nut is screwed onto the threaded part of the locking pin to connect the locking pin with the first mounting bracket. The first insulating spacer separates the first locking nut from the first mounting bracket, and the first insulating heat shrinkable sleeve separates the locking pin from the first mounting bracket; The rear end of the locking pin is welded to one end of the first wire, and the other end of the first wire is welded to the first aviation pin; The locking hole assembly (2) includes a spring piece (21), a locking rod (22), a rivet (23), a second mounting bracket (1-2), a second insulating bushing (1-3), a second insulating spacer (1-4), a second locking nut (1-5), a second aviation pin (1-6), a second wire (1-7) and a number of second insulating heat shrinkable sleeves (1-8); Two spring pieces are riveted to one side of the flat plate of the locking rod through a rivet. The threaded end of the locking rod passes through the middle hole of the second mounting bracket. The second insulating bushing separates the locking rod from the second mounting bracket, and the protruding part of the locking rod fits with the flanging of the second insulating bushing; The second locking nut is screwed onto the threaded part of the locking rod to connect the locking rod with the second mounting bracket. The second insulating spacer separates the second locking nut from the second mounting bracket, and the second insulating heat shrinkable sleeve separates the spring piece from the second mounting bracket; The rear end of the locking rod is welded to one end of the second wire, and the other end of the second wire is welded to the second aviation pin; In the initial state, the explosion bolt unlocking telemetry device is connected to both sides of the separation surface of the explosion bolt through a mounting bracket, and the locking pin assembly and the locking hole assembly are in a compressed state; When the explosion bolt breaks from the separation surface and continues to move to both sides under the action of the residual impulse of separation, the explosion bolt drives the locking pin assembly and the locking hole assembly to move to both sides respectively until the passage state of the locking pin assembly and the locking hole assembly is disconnected; Judge whether the explosion bolt is unlocked by remotely measuring the on and off states of the explosion bolt unlocking telemetry device.

2. The telemetry device for unlocking an explosive bolt according to claim 1, characterized in that Connection between the locking pin assembly and the locking hole assembly: The ball head at the top of the locking pin pushes open the spring piece of the locking hole. The ball head of the locking pin is at the round hole of the spring piece. The spring piece clamps the ball head of the locking pin and has a certain pressure on the ball head to ensure that the locking pin assembly and the locking hole assembly are always in contact.

3. The telemetry device for unlocking an explosive bolt according to claim 2, wherein, The locking pin, spring piece, locking rod, wire and aviation pin form a complete conduction line. This conduction line is separated from the mounting bracket through the insulating bushing and insulating spacer, and is insulated from the connecting bracket and the explosion bolt.

4. The telemetry device for unlocking an explosive bolt according to claim 1, wherein The size of the ball head at the top of the locking pin is larger than the distance between the two spring pieces of the locking hole assembly. The ball head of the locking pin is placed at the round hole of the spring piece. The spring piece is in a state of opening to both sides. The spring piece clamps the ball head of the locking pin and has a certain pressure on the ball head. The locking pin and the locking hole assembly are always in contact.

5. A telemetry device for unlocking an explosive bolt according to claim 1, characterized in that, The middle of the locking pin has a raised flange, the other end of the locking pin is a threaded section, and the end of the threaded section is a wire welding groove.

6. The telemetry device for unlocking an explosive bolt according to claim 1, characterized in that, The insulating bushing is made of insulating material, has an annular structure, and has an annular flange at one end.

7. A telemetry device for unlocking an explosive bolt according to claim 1, characterized in that, One end of the locking rod is a flat plate with two rivet holes in the middle. The middle of the locking rod has a raised flange, the other end of the locking rod is a threaded section, and the end of the threaded section is a wire welding groove.

8. The telemetry device for unlocking an explosive bolt according to claim 1, characterized in that, One end of the spring piece has two rivet holes, the other end of the spring piece has a spherical hole, and the end of the side with the spherical hole is a structure bent outward.

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