The cargo-parachute separation mechanism after the airdrop equipment enters the water

Abstract

The invention discloses a cargo-parachute separation mechanism after airdrop equipment enters water, which solves the problems of slow cargo-parachute separation speed and low cargo-parachute separation success rate existing in the existing separation mechanism. A spring (1) is arranged between the piston (13) and the cylinder cover (11), a thermal battery starting pin sleeve (16) is arranged in the piston cylinder (10) below the piston (13), a compressed compression spring (18) is arranged on the thermal battery starting pin (6), a safety pin (2) is fixedly arranged on the bottom end surface of the piston (13), a thermal battery (3) is arranged in the piston cylinder (10) below the thermal battery starting pin sleeve, an explosive bolt control circuit board (7) is connected to the insulation pad (4), an explosive bolt (9) is fixedly arranged on the bottom end plate of the piston cylinder (10), the explosive bolt is electrically connected to the explosive bolt control circuit board, and an airdrop equipment connection seat (5) is fixedly connected to the lower end of the explosive bolt. The equipment can be quickly deployed in place after entering the water, and the cargo-parachute separation is fast.

Description

Technical Field

[0001] The invention relates to a water entry separation mechanism for airdrop equipment, which is suitable for equipment deployed in water, which is airdropped onto the water surface by a parachute. After entering the water, the airdrop deployed equipment is required to be reliably separated from the parachute, so that the deployed equipment in the water can be deployed in place as soon as possible. Background Art

[0002] Sometimes, detection equipment needs to be deployed in lakes or oceans to detect and investigate the oceans or lakes. Some equipment is deployed in water by airdropping flying objects in the air. These equipment fall into the water through parachutes and need to be separated from the parachutes as soon as possible after entering the water to facilitate the deployment of the equipment in the water. The existing equipment and parachute separation mechanism of underwater airdrop equipment usually uses a mechanical separation method, which has the problems of slow separation speed and low success rate of separation. Summary of the invention

[0003] The invention provides a cargo-parachute separation mechanism after airdrop equipment enters water, which solves the technical problems of slow cargo-parachute separation speed and low cargo-parachute separation success rate in the existing separation mechanism.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A parachute separation mechanism for an airdrop device after entering water comprises a piston cylinder, a cylinder cover is arranged at the top of the piston cylinder, a piston rod through hole is arranged in the center of the cylinder cover, a piston is arranged at the upper part of the piston cylinder, a piston rod is arranged on the upper top surface of the piston, the piston rod is fixedly connected with the bottom end frame of the parachute after passing through the piston rod through hole, a spring is arranged between the piston and the cylinder cover, a thermal battery starting pin sleeve is arranged in the piston cylinder below the piston, a thermal battery starting plate is arranged at the left end of the thermal battery starting pin sleeve, and a thermal battery starting plate is arranged at the right end of the thermal battery starting pin sleeve. A thermal battery starting pin is provided, a compression spring is provided on the thermal battery starting pin, a safety pin is fixedly provided on the bottom end surface of the piston, the lower end of the safety pin is top-connected with the head of the thermal battery starting pin, a thermal battery is provided in the piston cylinder below the thermal battery starting pin sleeve, an insulating pad is connected to the thermal battery, an explosive bolt control circuit board is connected to the insulating pad, an explosive bolt is fixedly provided on the bottom end plate of the piston cylinder, the explosive bolt and the explosive bolt control circuit board are electrically connected together, and an airdrop equipment connecting seat is fixedly connected to the lower end of the explosive bolt.

[0006] A seawater contact electrode is arranged on the piston cylinder, the seawater contact electrode is electrically connected to the explosive bolt control circuit board, one end of the seawater contact electrode is connected to the positive end of the power output of the thermal battery through a fourth resistor, the other end of the seawater contact electrode is grounded, a first input end of a first NOR gate is connected to one end of the seawater contact electrode, a second input end of the first NOR gate is grounded, an output end of the first NOR gate is connected to the base of a transistor through a first resistor, the emitter of the transistor is grounded, the collector of the transistor is connected to one end of a closing coil of a relay, the other end of the closing coil of the relay is connected to the positive end of the power output of the thermal battery, and the relay The moving contact is connected to the electric control input end of the explosive bolt, the normally closed fixed contact of the relay is grounded, a third resistor is connected between the electric control input end of the explosive bolt and the ground, the normally open fixed contact of the relay is connected to the collector of the PMOS power tube, the emitter of the PMOS power tube is connected to the positive end of the power output of the thermal battery, the base of the PMOS power tube is connected to the output end of the second NOR gate, the two input ends of the second NOR gate are short-circuited and connected to the output end of the first NOR gate, a second resistor is connected between the base of the PMOS power tube and the emitter of the PMOS power tube, and a diode is connected in parallel at both ends of the closing coil of the relay.

[0007] The present invention improves the reliability of separation of deployed equipment entering water, can realize rapid separation of equipment and parachute, enables the equipment to be deployed in place after rapid entry into water, and separation of equipment and parachute is rapid. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the mechanical structure of the present invention;

[0009] Figure 2 It is a schematic diagram of the circuit structure of the explosive bolt control circuit board 7 of the present invention. DETAILED DESCRIPTION

[0010] The present invention is described in detail below in conjunction with the accompanying drawings:

[0011] A parachute separation mechanism for airdrop equipment after entering water, comprising a piston cylinder 10, a cylinder cover 11 is arranged at the top of the piston cylinder 10, a piston rod through hole 12 is arranged in the center of the cylinder cover 11, a piston 13 is arranged at the upper part of the piston cylinder 10, a piston rod 14 is arranged on the upper top surface of the piston 13, the piston rod 14 passes through the piston rod through hole 12 and is fixedly connected with the parachute bottom end frame 15, a spring 1 is arranged between the piston 13 and the cylinder cover 11, a thermal battery starting pin sleeve 16 is arranged in the piston cylinder 10 below the piston 13, a thermal battery starting plate 17 is arranged at the left end of the thermal battery starting pin sleeve 16, and a thermal battery starting plate 17 is arranged at the thermal battery starting pin sleeve 16. A thermal battery starting pin 6 is arranged at the right end of the movable pin sleeve 16, and a tightened compression spring 18 is arranged on the thermal battery starting pin 6. A safety pin 2 is fixedly arranged on the bottom end surface of the piston 13, and the lower end of the safety pin 2 is top-connected with the head of the thermal battery starting pin 6. A thermal battery 3 is arranged in the piston cylinder 10 below the thermal battery starting pin sleeve 16, and an insulating pad 4 is connected to the thermal battery 3, and an explosive bolt control circuit board 7 is connected to the insulating pad 4. An explosive bolt 9 is fixedly arranged on the bottom end plate of the piston cylinder 10, and the explosive bolt 9 is electrically connected to the explosive bolt control circuit board 7, and an airdrop equipment connecting seat 5 is fixedly connected to the lower end of the explosive bolt 9.

[0012] A seawater contact electrode 8 is provided on the piston cylinder 10, and the seawater contact electrode 8 is electrically connected to the explosive bolt control circuit board 7, one end of the seawater contact electrode 8 is connected to the positive power output terminal VCC of the thermal battery 3 through the fourth resistor R4, and the other end of the seawater contact electrode 8 is grounded, and the first input end of the first NOR gate D1A is connected to one end of the seawater contact electrode 8, and the second input end of the first NOR gate D1A is grounded, and the output end of the first NOR gate D1A is connected to the base of the transistor V1 through the first resistor R1, and the emitter of the transistor V1 is grounded, and the collector of the transistor V1 is connected to one end of the closing coil of the relay K1, and the other end of the closing coil of the relay K1 is connected to the positive power output terminal VCC of the thermal battery 3, and the relay K1 The moving contact J1 is connected to the electric control input end of the explosive bolt 9, the normally closed fixed contact J3 of the relay K1 is grounded, a third resistor R3 is connected between the electric control input end of the explosive bolt 9 and the ground, the normally open fixed contact J2 of the relay K1 is connected to the collector of the PMOS power tube V2, the emitter of the PMOS power tube V2 is connected to the positive power output terminal VCC of the thermal battery 3, the base of the PMOS power tube V2 is connected to the output end of the second NOR gate D1B, the two input ends of the second NOR gate D1B are short-circuited and connected to the output end of the first NOR gate D1A, a second resistor R2 is connected between the base of the PMOS power tube V2 and the emitter of the PMOS power tube V2, and a diode V3 is connected in parallel at both ends of the closing coil of the relay K1.

[0013] The deployment equipment is suspended on the airdrop equipment connecting seat 5. After the deployment equipment is airdropped into the air, when the parachute connected to the bottom end frame 15 of the parachute is opened, the parachute will drive the piston rod 14 to move upward relative to the piston cylinder 10, so that the spring 1 is compressed. At the same time, the piston 13 drives the safety pin 2 thereon to move upward, and the top connection of the lower end of the safety pin 2 to the head of the thermal battery starting pin 6 is released. The thermal battery starting pin 6 pops out to the left under the action of the compression spring 18 and hits the thermal battery starting plate 17, so that the thermal battery 3 starts the working state and provides power for the explosive bolt control circuit board 7.

[0014] During the descent of the deployed equipment in the air, the control circuit of the explosive bolt 9 is in an open-circuit state through the seawater contact 8. When the piston cylinder 10 enters the water, the two poles of the seawater contact 8 are connected after contacting the seawater, so that the control circuit of the explosive bolt 9 is connected, the explosive bolt 9 is detonated, and the airdrop equipment connecting seat 5 is separated from the piston cylinder 10, thereby realizing the rapid separation of the cargo parachute.

[0015] The working principle of the control circuit of the explosive bolt 9 is as follows: before the equipment enters the water, one pole of the seawater contact electrode 8 is grounded, and the other pole is connected to the positive power output terminal VCC of the thermal battery 3 through the fourth resistor R4, which is high level, the output of the NOR gate D1A is low level, the transistor V1 is not conducting, the transistor control circuit does not work, the coil in the relay K1 is in a power-off state, and the moving contact in the relay K1 is in a normally closed grounding position. At this time, both ends of the explosive bolt 9 are grounded, the output of the NOR gate D1B is high, the PMOS power tube V2 is not conducting, and the relay is connected to the normally closed contact. The head is grounded, the relay switch circuit has no output, and the detonation output signal is low; when the piston cylinder 10 enters the water, the two poles of the seawater contact 8 are connected after contacting the seawater, and the two poles of the contact electrode 8 are both at a low level, the output of the NOR gate D1A is a high level, the transistor V1 is turned on, the transistor control circuit works, the coil in the relay K1 is energized, the moving contact in the relay K1 is attracted to the closing contact, the output of the NOR gate D1B is low, the PMOS power tube V2 is turned on and works, the detonation output signal is high, the detonator is activated, the explosive bolt 9 is detonated, and the separation of the parachute from the equipment is realized.

Claims

1. A device for separating a parachute from an airdrop device after it enters water, comprising a piston cylinder (10), a cylinder cover (11) being arranged at the top end of the piston cylinder (10), a piston rod through hole (12) being arranged at the center of the cylinder cover (11), a piston (13) being arranged at the upper part of the piston cylinder (10), a piston rod (14) being arranged on the upper top surface of the piston (13), the piston rod (14) passing through the piston rod through hole (12) and then being fixedly connected to a parachute bottom frame (15), characterized in that: A spring (1) is arranged between the piston (13) and the cylinder cover (11); a hot battery starting pin sleeve (16) is arranged in the piston cylinder (10) below the piston (13); a hot battery starting pole plate (17) is arranged at the left end of the hot battery starting pin sleeve (16); a hot battery starting pin (6) is arranged at the right end of the hot battery starting pin sleeve (16); a compression spring (18) is arranged on the hot battery starting pin (6); a safety pin (2) is fixedly arranged on the bottom end surface of the piston (13); and the lower end of the safety pin (2) is fixedly arranged on the bottom end surface of the piston (13). A thermal battery (3) is arranged in the piston cylinder (10) below the thermal battery starting pin sleeve (16), and a heat insulating pad (4) is connected to the thermal battery (3). An explosive bolt control circuit board (7) is connected to the heat insulating pad (4). An explosive bolt (9) is fixedly arranged on the bottom end plate of the piston cylinder (10). The explosive bolt (9) and the explosive bolt control circuit board (7) are electrically connected together. An airdrop equipment connection seat (5) is fixedly connected to the lower end of the explosive bolt (9).

2. The cargo-parachute separation mechanism for airdrop equipment after entering water according to claim 1, characterized in that: A seawater contact electrode (8) is provided on the piston cylinder (10). The seawater contact electrode (8) is electrically connected to the explosive bolt control circuit board (7). One end of the seawater contact electrode (8) is connected to the positive power output terminal (VCC) of the thermal battery (3) through a fourth resistor (R4). The other end of the seawater contact electrode (8) is grounded. A first input terminal of a first NOR gate (D1A) is connected to one end of the seawater contact electrode (8). The second input terminal of the first NOR gate (D1A) is grounded. The output terminal of the first NOR gate (D1A) is connected to the base of a transistor (V1) through a first resistor (R1). The emitter of the transistor (V1) is grounded. The collector of the transistor (V1) is connected to one end of a closing coil of a relay (K1). The other end of the closing coil of the relay (K1) is connected to the positive power output terminal (VCC) of the thermal battery (3). The relay (K1) The movable contact (J1) is connected to the electric control input end of the explosive bolt (9), the normally closed fixed contact (J3) of the relay (K1) is grounded, a third resistor (R3) is connected between the electric control input end of the explosive bolt (9) and the ground, the normally open fixed contact (J2) of the relay (K1) is connected to the collector of the PMOS power tube (V2), the emitter of the PMOS power tube (V2) is connected to the positive power output end (VCC) of the thermal battery (3), the base of the PMOS power tube (V2) is connected to the output end of the second NOR gate (D1B), the two input ends of the second NOR gate (D1B) are short-circuited and connected to the output end of the first NOR gate (D1A), a second resistor (R2) is connected between the base of the PMOS power tube (V2) and the emitter of the PMOS power tube (V2), and a diode (V3) is connected in parallel at both ends of the closing coil of the relay (K1).

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