Pneumatic ultralow-temperature explosive ordnance disposal device

Abstract

The utility model discloses a pneumatic ultralow-temperature explosive-handling device, which relates to the technical field of explosive-handling devices, and comprises an injector, a support, a wire spool, a controller, a self-pressurization liquid nitrogen tank and a low-temperature-resistant connecting conduit, the controller remotely controls an electromagnetic valve to act and open, high-pressure gas in a gas cylinder is quickly released, impact force is formed, and the explosive-handling device is started. The piston rod in the piston barrel is pushed to move forwards, so that the injector injects the explosive, liquid nitrogen in the liquid nitrogen bottle enters the flow divider through the low-temperature-resistant connecting guide pipe by adjusting the self-pressurization liquid nitrogen tank, and flows into the destroyed object through the injector, and the destroyed object is destroyed through the low-temperature-resistant connecting guide pipe by utilizing the ultralow-temperature characteristic of the liquid nitrogen. According to the utility model, the injector is pushed through compressed air, the operation is more convenient and safer, and the self-pressurization liquid nitrogen tank is adopted, so that the structure is more compact, and the use is more convenient and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of explosive disposal devices, in particular to a pneumatic ultra-low temperature explosive disposal device. Background Technique

[0002] With the progress of the times, explosives have become more concealed, mostly in the form of packages. And with the progress of technology, the triggering forms of explosives have become more complex, such as light-induced initiation, sound-induced initiation, vibration-induced initiation, remote control initiation, delay initiation, etc. For bomb disposal personnel, there are huge risks in observing explosives by opening the package. Therefore, how to destroy the internal electronic triggering core without opening the package has become the key to solving the problem.

[0003] Liquid nitrogen has good low-temperature characteristics, and its temperature can reach -196°C. The low-temperature resistance of military-grade electronic components is only -70°C. And for the battery used for power supply, its internal voltage will also drop in a low-temperature environment. In an environment of -196°C, the battery will completely lose voltage and cannot drive other components.

[0004] To cool explosives with liquid nitrogen, it is necessary to inject liquid nitrogen into the explosives. Currently, the spring drive method is mainly used to insert the needle of the syringe into the explosives. Due to the limited power provided by the spring, the insertion effect is not good, and it cannot ensure effective insertion into the interior of the explosives, presenting potential safety hazards.

[0005] In existing equipment, the self-pressurizing liquid nitrogen tank uses an electric-driven booster pump for liquid discharge and needs to be equipped with a mobile battery for power supply. If the lead-out wire battery has no power or the battery fails, the entire equipment cannot work.

[0006] Therefore, there is an urgent need to invent a pneumatic ultra-low temperature explosive disposal device to solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to provide a pneumatic ultra-low temperature explosive disposal device to solve the technical problems raised in the above background technique.

[0008] To achieve the above purpose, the utility model provides the following technical solution: A pneumatic ultra-low temperature explosive disposal device, comprising: a syringe, a bracket, a wire reel, a controller, a self-pressurizing liquid nitrogen tank, and a low-temperature resistant connecting conduit. The syringe is snap-fixed above the bracket, the self-pressurizing liquid nitrogen tank is bolted to the syringe through the low-temperature resistant connecting conduit, and the controller is electrically connected to the syringe through the wire reel.

[0009] Preferably, the syringe comprises: an injection needle, a piston rod, a sealing plug, a diverter, a piston barrel, a piston, a barrel plug, a solenoid valve, a pressure reducing valve, a gas cylinder and a high-pressure gas pipe. The piston rod is arranged inside the piston barrel. The front end of the piston barrel is fixedly connected with a diverter. The tail end of the piston barrel is bolted and fixed with a barrel plug. The front end of the piston rod is bolted and fixed with an injection needle. A sealing plug is bolted and fixed between the front end of the diverter and the piston rod. A piston is clamped at the tail of the piston rod. The tail end of the barrel plug is fixedly connected with a solenoid valve. The pressure reducing valve is bolted and fixed with the solenoid valve through a high-pressure gas pipe. The top of the pressure reducing valve is fixedly connected with a gas cylinder.

[0010] Preferably, the diverter, the piston barrel, the piston and the barrel plug form a unidirectional pushing cylinder. The pressure reducing valve conducts the compressed air after pressure limit through a high-pressure gas pipe and forms a back pressure at one end of the solenoid valve. After the solenoid valve receives the opening signal from the controller, the solenoid valve quickly opens.

[0011] Preferably, an injection needle is arranged at the front end of the syringe. There are 4 liquid discharge holes and 4 diversion grooves inside the injection needle. A low-temperature-resistant PTFE sealing gasket is arranged at the connection between the tail of the diverter and the piston rod. A low-temperature-resistant PTFE sealing gasket is arranged at the connection between the sealing plug and the piston rod. A liquid discharge groove is arranged inside the piston rod and a through hole is arranged in the middle of the piston rod. After the piston moves forward, the through hole on the piston rod will move forward and communicate with the pipeline inside the diverter.

[0012] Preferably, the bracket adopts a three-point support structure and comprises: a bracket, a support rod, a connecting rod, a long leg, a short leg and a wing bolt. There are two short legs, and the top of the short legs is in a bevel gear structure. The short legs and the long legs are bolted and fixed through wing bolts. The length of the long legs is 1.5 times that of the short legs. Both ends of the support rod and the connecting rod are in a bevel gear structure. The connecting rod is bolted and fixed with the long legs through wing bolts. The connecting rod and the support rod are rotatably connected through a bevel gear structure. The support rod and the bracket are bolted and fixed through wing bolts.

[0013] Preferably, the self-pressurizing liquid nitrogen tank adopts an inner and outer double-layer tank structure. A liquid discharge valve and a pressurizing valve are arranged at the top of the self-pressurizing liquid nitrogen tank. The pressurizing valve is fixedly connected with a pressurizing pipe. The pressurizing pipe sends normal-temperature air into the inner tank pipe. There are 2 sets of safety rupture disks with different pressure levels at the top of the self-pressurizing liquid nitrogen tank.

[0014] Advantageous effects

[0015] The technical solution provided by the present utility model has the following advantageous effects compared with the prior art:

[0016] The utility model is a special tool that uses the ultra-low temperature characteristics of liquid nitrogen to damage the batteries, circuit boards, and electronic components inside explosives. It can freeze the internal electrical components in a short time, causing the internal electrical appliances to fail temporarily, so as to prevent detonation during the movement process. This device can reduce the risk of personnel directly contacting explosive devices through remote operation or automation technology.

[0017] The utility model injects liquid nitrogen into the interior of the explosive through remote control, and uses the low-temperature characteristics of liquid nitrogen to freeze the internal electrical components of the explosive, causing the internal electrical appliances to fail temporarily, so as to prevent detonation during the movement process. At the same time, by rotating and adjusting each joint of the bracket, the height and angle of the bracket can be adjusted, facilitating the injection needle to accurately penetrate into a safe part of the explosive.

[0018] The syringe of the utility model uses compressed air as the power source, which improves the intake intensity of the syringe, can adjust the impact force in real time according to needs, greatly improves the safety of operation, and at the same time, the device is provided with multiple safety valves, which improves the safety of the product.

[0019] The utility model adopts a self-pressurizing liquid nitrogen tank. Compared with a liquid nitrogen tank that relies on an electric-driven booster pump for liquid discharge, the structure is more compact, the use is more convenient and reliable, and it avoids the situation where the equipment cannot work due to the lack of power of the storage battery. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a pneumatic ultra-low temperature explosive disposal device;

[0021] Figure 2 It is a partial sectional view of the syringe structure;

[0022] Figure 3 It is a schematic structural diagram of the bracket;

[0023] Figure 4 It is a sectional view of the front end structure of the syringe;

[0024] Figure 5 It is a sectional view of the top structure of the self-pressurizing liquid nitrogen tank.

[0025] In the figure: 1. Syringe; 2. Bracket; 3. Wire reel; 4. Controller; 5. Self-pressurizing liquid nitrogen tank; 6. Low-temperature resistant connecting conduit; 7. Injection needle; 8. Piston rod; 9. Sealing plug; 10. Shunt; 11. Piston barrel; 12. Piston; 13. Barrel plug; 14. Solenoid valve; 15. Pressure reducing valve; 16. Gas cylinder; 17. High-pressure air pipe; 18. Support rod; 19. Connecting rod; 20. Long leg; 21. Short leg; 22. Butterfly bolt; 23. Bracket; 24. Through hole; 25. Liquid discharge valve; 26. Pressurizing valve; 27. Pressurizing pipe; 28. Low-temperature resistant PTFE sealing gasket. Specific Embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] A pneumatic ultra-low temperature explosive disposal device includes: a syringe 1, a bracket 2, a wire reel 3, a controller 4, a self-pressurizing liquid nitrogen tank 5, and a low-temperature resistant connecting conduit 6. The syringe 1 includes: an injection needle 7, a piston rod 8, a sealing plug 9, a diverter 10, a piston cylinder 11, a piston 12, a cylinder plug 13, a solenoid valve 14, a pressure reducing valve 15, a gas cylinder 16, and a high-pressure air pipe 17. The piston rod 8 is arranged inside the barrel of the piston 12. The front end of the piston cylinder 11 is fixedly connected to the diverter 10. The front end of the piston rod 8 is bolted and fixed to the injection needle 7. A sealing plug 9 is bolted and fixed between the front end of the diverter 10 and the piston rod 8. The tail of the piston rod 8 is clamped with the piston 12. The tail end of the piston cylinder 11 is bolted and fixed to the cylinder plug 13. The tail end of the cylinder plug 13 is fixedly connected to the solenoid valve 14. The pressure reducing valve 15 is bolted and fixed to the solenoid valve 14 through the high-pressure air pipe 17. The top of the pressure reducing valve 15 is fixedly connected to the gas cylinder 16.

[0028] In some embodiments, the diverter 10, the piston cylinder 11, the piston 12, and the cylinder plug 13 form a unidirectional pushing cylinder. The pressure reducing valve 15 conducts the pressure-limited compressed air through the high-pressure air pipe 17 and forms a back pressure at one end of the solenoid valve 14. After the solenoid valve 14 receives the opening signal from the controller 4, the solenoid valve 14 quickly opens, so that the high-pressure gas acts on the piston 12, pushing the piston rod 8 to move forward, and making the injection needle 7 penetrate into the explosive. By adjusting the pressure of the pressure reducing valve 15, the impact force of the injection needle 7 can be adjusted.

[0029] In some embodiments, the syringe 1 is a low-temperature resistant internal hollow structure. The front end of the syringe 1 is provided with an injection needle 7. The injection needle 7 is provided with 4 liquid discharge holes and 4 flow guide grooves. A low-temperature resistant polytetrafluoroethylene sealing gasket 28 is provided at the connection between the tail of the diverter 10 and the piston rod 8. A low-temperature resistant polytetrafluoroethylene sealing gasket 28 is provided at the connection between the sealing plug 9 and the piston rod 8. The piston rod 8 is internally provided with a liquid discharge groove and a through hole 24 is provided in the middle of the piston rod 8. After the piston 12 moves forward, the through hole 24 on the piston rod 8 will move forward and communicate with the pipeline inside the diverter 10, so that the liquid nitrogen flows into the piston rod 8 through the diverter 10. After being transmitted to the injection needle 7, it flows out through the liquid discharge holes. The low-temperature resistant polytetrafluoroethylene sealing gaskets 28 provided at the tail of the diverter 10 and the sealing plug 9 enable the overall structure to ensure that the liquid nitrogen will not flow out during the process of transporting the liquid nitrogen.

[0030] In some embodiments, the bracket 2 adopts a three-point support structure, including: a bracket 23, a support rod 18, a connecting rod 19, a long leg 20, a short leg 21 and a wing nut 22. There are two short legs 21, and the top of the short leg 21 is a bevel gear structure. The short leg 21 and the long leg 20 are bolted and fixed through the wing nut 22. The length of the long leg 20 is 1.5 times that of the short leg 21. Both ends of the support rod 18 and the connecting rod 19 are bevel gear structures. The connecting rod 19 is bolted and fixed to the long leg 20 through the wing nut 22. The connecting rod 19 and the support rod 18 are rotatably connected through the bevel gear structure. The support rod 18 and the bracket 23 are bolted and fixed through the wing nut 22. The overall height of the bracket 2 and the angle of the bracket 23 can be controlled by adjusting the support rod 18 and the connecting rod 19. Each joint part adopts a bevel gear in cooperation with the wing nut 22, enabling the bracket 2 to be quickly stored and deployed.

[0031] In some embodiments, the self-pressurizing liquid nitrogen tank 5 adopts an inner and outer double-layer tank structure. A pressure boosting pipe is provided at the top of the self-pressurizing liquid nitrogen tank 5. The pressure boosting pipe sends normal temperature air into the inner tank pipe, causing the liquid nitrogen in the inner tank to boil and form pressure in the inner tank, forcing the liquid nitrogen to flow out through the drain pipe. By adjusting the pressure of the pressure boosting pipe, the control of the drainage flow rate is achieved. Two sets of safety rupture disks with different pressure levels are provided at the top of the self-pressurizing liquid nitrogen tank 5, making the liquid nitrogen tank safer. The self-pressurizing liquid nitrogen tank 5 is more compact in structure, more convenient and reliable to use than a liquid nitrogen tank that relies on an electric-driven booster pump for drainage, avoiding the situation where the equipment cannot work due to the battery being out of power.

[0032] Embodiment 1

[0033] Please refer to Figures 1-5 , the present utility model provides a pneumatic cryogenic explosion-proof device. During use, it needs to be assembled on-site before use. The syringe 1 is installed on the bracket 2, and the height and angle of the bracket 2 are adjusted so that the injection needle 7 on the syringe 1 is about 20 mm away from the explosive. The self-pressurizing liquid nitrogen tank 5 is bolted to the diverter 10 on the injection needle 7 through a low-temperature resistant conduit. The drain valve 25 and the pressure boosting valve 26 on the self-pressurizing liquid nitrogen tank 5 are opened, causing the liquid nitrogen to flow into the diverter 10 through the low-temperature resistant conduit. At this time, the piston rod 8 in the diverter 10 is in its original position, and no liquid nitrogen flows out of the injection needle 7.

[0034] Electrically connect the controller 4 to the solenoid valve 14 on the syringe 1 through the wire reel 3. Drag the wire reel 3 and the controller 4 to a distance of 50 meters away. Press the test button on the controller 4 to detect the circuit connection. After ensuring it is correct, activate the firing button on the controller 4. At this time, the solenoid valve 14 at the tail end of the syringe 1 quickly opens, applying the high-pressure gas after pressure limiting on the piston 12, pushing the piston rod 8 to move forward, so that the injection needle 7 inserts into the explosive. The pressure of the pressure reducing valve 15 can be adjusted through the controller 4, and the impact force of the syringe 1 can be adjusted by adjusting the pressure in the high-pressure air pipe 17. At the same time, the through hole 25 of the piston rod 8 corresponds to the inner pipe of the diverter 10. The liquid nitrogen in the diverter 10 enters the inside of the piston rod 8 through the drain groove and flows into the injection needle 7, and finally sprays out from the 4 drain holes of the injection needle 7 to achieve the failure of the battery components in the explosive.

[0035] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.

Claims

1. A pneumatic ultra-low temperature explosion disposal device, characterized in that : It includes: a syringe, a bracket, a winding reel, a controller, a self-pressurized liquid nitrogen tank and a low-temperature resistant connecting conduit. The syringe is clamped and fixed on the top of the bracket. The self-pressurized liquid nitrogen tank is bolted to the syringe through the low-temperature resistant connecting conduit. The controller is electrically connected to the syringe through the winding reel.

2. A pneumatic ultra-low temperature explosion disposal device according to claim 1, characterized in that The syringe comprises: an injection needle, a piston rod, a sealing plug, a diverter, a piston cylinder, a piston, a barrel plug, a solenoid valve, a pressure reducing valve, a gas cylinder and a high-pressure gas pipe. A piston rod is arranged in the piston cylinder. The front end of the piston cylinder is fixedly connected with a diverter. The rear end of the piston cylinder is bolted with a barrel plug. The front end of the piston rod is bolted with an injection needle. A sealing plug is bolted between the front end of the diverter and the piston rod. A piston is clamped at the rear end of the piston rod. The rear end of the barrel plug is fixedly connected with a solenoid valve. The pressure reducing valve is bolted and fixed to the solenoid valve through a high-pressure gas pipe. The top of the pressure reducing valve is fixedly connected to the gas cylinder.

3. A pneumatic ultra-low temperature explosion disposal device according to claim 2, characterized in that :The diverter, piston cylinder, piston, and barrel plug form a one-way thrust cylinder. The pressure reducing valve conducts the compressed air after pressure limiting through the high-pressure air pipe and forms back pressure at one end of the solenoid valve. After the solenoid valve receives the opening signal from the controller, the solenoid valve opens quickly.

4. A pneumatic ultra-low temperature explosion disposal device according to claim 2, characterized in that: An injection needle is provided at the front end of the syringe, and 4 drainage holes and 4 guide grooves are provided in the injection needle. A low-temperature resistant polytetrafluoroethylene sealing gasket is provided at the connection between the tail of the diverter and the piston rod, and a low-temperature resistant polytetrafluoroethylene sealing gasket is provided at the connection between the sealing plug and the piston rod. A drainage groove is provided inside the piston rod and a through hole is provided in the middle of the piston rod. After the piston moves forward, the through hole on the piston rod will move forward and be connected with the pipeline in the diverter.

5. The pneumatic ultra-low temperature explosion disposal device according to claim 1, characterized in that: The bracket adopts three-point support, including: a bracket, a support rod, a connecting rod, a long leg, a short leg and a butterfly bolt. There are two short legs, and the top of the short leg is a bevel tooth structure. The short leg and the long leg are bolted and fixed by butterfly bolts. The length of the long leg is 1.5 times the length of the short leg. Both ends of the support rod and the connecting rod are bevel tooth structures. The connecting rod is bolted and fixed to the long leg by a butterfly bolt. The connecting rod and the support rod are rotatably connected through the bevel tooth structure. The support rod and the bracket are bolted and fixed by butterfly bolts.

6. The pneumatic ultra-low temperature explosion disposal device according to claim 1, characterized in that: The self-pressurizing liquid nitrogen tank adopts an inner and outer double-layer tank structure. A drain valve and a boosting valve are provided on the top of the self-pressurizing liquid nitrogen tank. The boosting valve is fixedly connected to a boosting pipe, and the boosting pipe supplies normal temperature air to the inner tank pipe. Two sets of safety fragments with different pressure levels are provided on the top of the self-pressurizing liquid nitrogen tank.

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