Non-magnetic pneumatic explosive-handling wire cutter

Abstract

The utility model relates to the technical field of explosive ordnance disposal wire cutters, and discloses a non-magnetic pneumatic explosive ordnance disposal wire cutter which comprises a pneumatic control assembly, a wire cutter, an exploder assembly and an equipment box. The pneumatic control assembly comprises a panel, a gas cylinder, a gas distribution row, a gas source pressure gauge, a one-way valve, an inflation nozzle, a stop valve, a pressure reducing valve, a working pressure gauge, an electromagnetic valve, a gas outlet nozzle and a gas pipe, the wire cutter comprises a shell, a piston, a cutter bar, a movable cutter block, a fixed sleeve, a fixed cutter block, a wire pressing sleeve and a grounding wire, and the exploder assembly comprises a wire and a connecting exploder. Working pressure needed by the system can be adjusted, a wire in the explosive detonating device can be cut off in a long distance, and injury to surrounding personnel caused by accidental explosion when the wire of the explosive detonating device is cut off is avoided; the movable cutter block and the fixed cutter block are made of non-magnetic materials, so that current circulation in the wire caused by accidental contact between the fracture of the wire and the cutter blocks after the wire is cut off can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of explosive discharge wire cutters, in particular to a non-magnetic pneumatic explosive discharge wire cutter. Background Art

[0002] The EOD wire cutter is a highly precise, safe, and reliable tool specifically designed for the dismantling of explosive devices. It is designed to safely cut the wires that prevent the device from detonating. This tool is crucial in EOD missions, as its precise design and remote operation capabilities allow operators to effectively address potential explosive threats from a safe distance.

[0003] Existing bomb disposal wire cutters generally use the signal output of the line when remotely controlling the line. However, in extreme bomb disposal environments, the signal is easily interfered with, and the electronic equipment is also easily damaged during use. The cost is high, which is not conducive to bomb disposal work in extreme situations when cutting the bomb disposal wire in such difficult and dangerous operations.

[0004] Therefore, it is necessary to design a non-magnetic pneumatic bomb disposal wire cutter to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a non-magnetic pneumatic bomb disposal wire cutter to solve the technical problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a non-magnetic pneumatic bomb disposal wire cutter, comprising: a pneumatic control assembly, a wire cutter, an initiator assembly and an equipment box; one end of the pneumatic control assembly is conductively connected to the wire cutter, and the other end is electrically connected to the initiator assembly; the pneumatic control assembly comprises a panel, a gas cylinder, a gas distribution exhaust, a gas source pressure gauge, a one-way valve, an inflation nozzle, a stop valve, a pressure reducing valve, a working pressure gauge, a solenoid valve, an air outlet nozzle and an air pipe; the panel is arranged inside the equipment box, To form a closed space, the outlet of the gas cylinder is connected to an air distribution row, and the two passages of the air distribution row are respectively connected to a gas source pressure gauge and a one-way valve, the other end of the one-way valve is connected to an inflation nozzle, the tail end of the air distribution row is connected to a stop valve, the other end of the stop valve is connected to a pressure reducing valve, one end of the pressure reducing valve outlet is connected to a working pressure gauge, and the other end is connected to a solenoid valve, the air outlet end of the solenoid valve is connected to an air outlet nozzle, and the air outlet nozzle is connected to an air pipe.

[0007] Preferably, the wire cutter includes a housing, a piston, a knife rod, a movable knife block, a fixed sleeve, a fixed knife block, a wire pressing sleeve and a grounding wire. The air pipe is conductively connected to the rear end of the wire cutter housing, a piston is installed inside the housing, the front end of the piston is fixedly connected to the knife rod, the front end of the knife rod is also provided with a sealing ring, the front end of the sealing ring is provided with a limit ring, the middle part of the knife rod is provided with a limit spring, which is located between the piston and the sealing ring, the front end of the knife rod is fixedly connected to the movable knife block, the front end of the movable knife block is provided with a fixed sleeve, the front end of the fixed sleeve is fixedly connected to the fixed knife block, the outside of the fixed sleeve is provided with a wire pressing sleeve, and the rear end of the housing is connected to the grounding wire.

[0008] Preferably, the initiator assembly includes a wire and a connecting initiator, the solenoid valve in the pneumatic control assembly is electrically connected to the wire, and the end of the wire is electrically connected to the initiator.

[0009] Preferably, the air source pressure gauge, inflation nozzle, pressure reducing valve, working pressure gauge and air outlet nozzle are all passed through the panel and arranged on the panel surface, and the remaining pneumatic control components are all arranged in the enclosed space formed by the panel and the inside of the equipment box.

[0010] Preferably, the front end of the shell is reduced in diameter, and a groove is provided along the circumference of its inner wall. The inner wall of the tail of the wire pressing sleeve is provided with a positioning groove along its circumference. A return spring is provided inside the groove and is sleeved on the fiber ring and extends into the positioning groove. The positioning groove is sleeved on the shell and can slide back and forth axially relative to the shell and the fixed sleeve. The outer wall of the fixed sleeve is also provided with a guide groove of a certain length. The wire pressing sleeve guide groove is provided with a guide screw passing through its side wall, and one end of the guide screw is located in the guide groove. The side of the fixed sleeve is also provided with a cutting opening.

[0011] Preferably, the movable blade block and the fixed blade block are both made of non-magnetic materials.

[0012] Preferably, a sealing rubber ring is further provided on the side wall of the piston and the sealing ring and is in sealing contact with the housing.

[0013] Beneficial effects

[0014] This utility model connects a pneumatic control assembly to an inflatable device, adjusts a pressure reducing valve to obtain the required working pressure of the system, and remotely controls the flow of compressed air into the cavity between the wire cutter piston and the housing through a solenoid valve, a wire, and a detonator, thereby pushing the piston, the cutter rod, and the movable cutter block to move, thereby forming a shear force with the fixed cutter block to cut the wire. This bomb disposal wire cutter can remotely cut the wires in the explosive detonator, thus preventing accidental explosions when the wires of the explosive detonator are cut and causing harm to surrounding personnel. The movable and fixed cutter blocks are made of non-magnetic materials to prevent the wire from accidentally contacting the cutter block after the wire is cut, resulting in current still flowing in the wire. A wire cutting opening is provided on the side of the wire cutter fixed sleeve, and a wire pressing sleeve is installed on the outside of the fixed sleeve to press the wire against the wire cutting opening, preventing the wire from falling out of the cutting opening before cutting. A grounding wire is provided at the rear of the wire cutter housing to conduct static electricity on the wire cutter to the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is an exploded schematic diagram of the pneumatic control assembly of the present invention;

[0017] Figure 3 This is the cross-sectional view at AA;

[0018] Figure 4 This is the cross-sectional view at BB;

[0019] Figure 5 This is a schematic diagram of the exploded structure of the thread cutter of the present invention;

[0020] Figure 6 This is an enlarged schematic diagram of the structure at A;

[0021] In the figure: 100, pneumatic control assembly; 101, air pipe; 102, panel; 103, gas cylinder; 104, gas distribution exhaust; 105, gas source pressure gauge; 106, one-way valve; 107, charging nozzle; 108, stop valve; 109, pressure reducing valve; 110, working pressure gauge; 111, solenoid valve; 112, outlet nozzle;

[0022] 200, Thread Cutter; 201, Housing; 202, Piston; 203, Cutter Bar; 204, Moving Cutter Block; 205, Fixed Sleeve; 206, Fixed Cutter Block; 207, Wire Cutter Bushing; 208, Grounding Wire; 209, Sealing Ring; 210, Limiting Ring; 211, Sealing Rubber Ring; 212, Thread Cutting Port; 213, Guide Groove; 214, Guide Screw; 215, Return Spring; 216, Limiting Spring; 217, Groove; 218, Positioning Slot;

[0023] 300, detonator assembly; 301, wire; 302, connecting detonator;

[0024] 400. Equipment box. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] A non-magnetic pneumatic bomb disposal wire cutter, comprising: a pneumatic control assembly 100, a wire cutter 200, an initiator assembly 300 and an equipment box 400; one end of the pneumatic control assembly 100 is conductively connected to the wire cutter 200, and the other end is electrically connected to the initiator assembly 300, the pneumatic control assembly 100 comprises a panel 102, a gas cylinder 103, a gas distribution exhaust 104, a gas source pressure gauge 105, a one-way valve 106, an inflating nozzle 107, a stop valve 108, a pressure reducing valve 109, a working pressure gauge 110, a solenoid valve 111, an air outlet nozzle 112 and an air pipe 101, the panel 102 is arranged inside the equipment box 400, forming a closed space therewith, the outlet of the gas cylinder 103 is conductively connected to the gas distribution exhaust 104, the gas distribution exhaust 105 is electrically connected to the ... the one-way valve 106, the inflating nozzle 107, the stop valve 108, the pressure reducing valve 109, the working pressure gauge 110, the solenoid valve 111, the air outlet nozzle 112 and the air pipe 101, 4, the two passages are respectively connected to a gas source pressure gauge 105 and a one-way valve 106, and the gas source pressure gauge 105 can detect the pressure in the gas cylinder 103; the other end of the one-way valve 106 is connected to a charging nozzle 107, and the charging nozzle 107 is connected to the charging equipment to realize the filling of compressed air into the gas cylinder 103; the tail end of the gas distribution row 104 is connected to a stop valve 108, and the other end of the stop valve 108 is connected to a pressure reducing valve 109, and one end of the outlet of the pressure reducing valve 109 is connected to a working pressure gauge 110 to detect the working pressure at the outlet of the pressure reducing valve 109, and the other end is connected to a solenoid valve 111, and the gas outlet end of the solenoid valve 111 is connected to an outlet nozzle 112, and the outlet nozzle 112 is connected to the air pipe 101.

[0027] In some embodiments, the wire cutter 200 includes a housing 201, a piston 202, a knife rod 203, a movable knife block 204, a fixed sleeve 205, a fixed knife block 206, a wire pressing sleeve 207 and a grounding wire 208. The air pipe 101 is connected to the tail end of the housing 201 of the wire cutter 200. The piston 202 is installed inside the housing 201. The piston 202 and the housing 201 form a closed cavity. The front end of the piston 202 is fixedly connected to the knife rod 203. The front end of the knife rod 203 is also provided with a sealing ring 20 9. A limiting ring 210 is provided at the front end of the sealing ring 209. A limiting spring 216 is provided in the middle of the knife rod 203 and is located between the piston 202 and the sealing ring 209. The front end of the knife rod 203 is fixedly connected to the movable knife block 204. The front end of the movable knife block 204 is provided with a fixing sleeve 205. The front end of the fixing sleeve 205 is fixedly connected to the fixed knife block 206. The outside of the fixing sleeve 205 is sleeved with a wire pressing sleeve 207. The tail of the shell 201 is connected to the grounding wire 208, which can conduct static electricity on the wire cutter 200 to the ground.

[0028] In some embodiments, the detonator assembly 300 includes a wire 301 and a connecting detonator 302. The solenoid valve 111 in the pneumatic control assembly 100 is electrically connected to the wire 301, and the end of the wire 301 is electrically connected to the detonator. This can achieve remote cutting of the wire 301 in the explosive detonator, thereby preventing accidental explosion when the wire 301 of the explosive detonator is cut off and causing harm to surrounding personnel.

[0029] In some embodiments, the air source pressure gauge 105, the inflation nozzle 107, the pressure reducing valve 109, the working pressure gauge 110 and the air outlet nozzle 112 all pass through the panel 102 and are arranged on the surface of the panel 102, and the remaining pneumatic control components 100 are all arranged in the enclosed space formed by the panel 102 and the equipment box 400.

[0030] In some embodiments, the front end of the shell 201 is reduced in diameter, and a groove 217 is provided along the circumference of its inner wall. The inner wall of the tail of the wire pressing sleeve 207 is provided along its circumference. A positioning groove 218 is provided inside the groove 217, which is sleeved on the fiber ring and extends into the positioning groove 218. The positioning groove 218 is sleeved on the shell 201 and can slide back and forth axially relative to the shell 201 and the fixed sleeve 205. The outer wall of the fixed sleeve 205 is also provided with a guide groove 213 of a certain length, and the wire pressing sleeve 207 is provided with a guide groove 213 of a certain length. A guide screw 214 is provided on the guide groove 213 of the sleeve 207 and passes through its side wall. One end of the guide screw 214 is located in the guide groove 213. A cutting opening 212 is also provided on the side of the fixed sleeve 205, which can press the wire 301 against the cutting opening 212 to prevent the wire 301 from escaping from the cutting opening 212 before cutting. At the same time, the movable and fixed blade blocks 206 are made of non-magnetic materials to prevent the wire 301 from accidentally contacting the blade block after the wire 301 is cut, resulting in current still flowing in the wire 301.

[0031] In some embodiments, the movable blade block 204 and the fixed blade block 206 are both made of non-magnetic materials.

[0032] In some embodiments, the non-magnetic material includes non-magnetic metals and ceramics.

[0033] In some embodiments, a sealing rubber ring 211 is further provided on the side walls of the piston 202 and the sealing ring 209 and is in sealing contact with the housing 201 to form a sealed space structure.

[0034] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

Claims

1. A non-magnetic pneumatic bomb disposal wire cutter, characterized in that and a tube connecting the discharging opening of the gas supply pipe, the tube which connects the gas supply pipe to the outlet, and the tube which connects the gas supply pipe to the outlet. The gas supply pipe is connected to the gas supply pipe of the gas supply pipe. The gas supply pipe is connected to the outlet of the gas supply pipe.

2. The non-magnetic pneumatic bomb disposal wire cutter according to claim 1, characterized in that: The wire cutter includes a housing, a piston, a knife rod, a movable knife block, a fixed sleeve, a fixed knife block, a wire pressing sleeve and a grounding wire. The air pipe is conductively connected to the rear end of the wire cutter housing. A piston is installed inside the housing. The front end of the piston is fixedly connected to the knife rod. The front end of the knife rod is also provided with a sealing ring. The front end of the sealing ring is provided with a limit ring. The middle part of the knife rod is provided with a limit spring, which is located between the piston and the sealing ring. The front end of the knife rod is fixedly connected to the movable knife block. The front end of the movable knife block is provided with a fixed sleeve. The front end of the fixed sleeve is fixedly connected to the fixed knife block. The outside of the fixed sleeve is provided with a wire pressing sleeve. The rear end of the housing is connected to the grounding wire.

3. The non-magnetic pneumatic bomb disposal wire cutter according to claim 2, characterized in that: The detonator assembly includes a wire and a connecting detonator. The solenoid valve in the pneumatic control assembly is electrically connected to the wire, and the end of the wire is electrically connected to the detonator.

4. The non-magnetic pneumatic bomb disposal wire cutter according to claim 1, characterized in that: The air source pressure gauge, inflation nozzle, pressure reducing valve, working pressure gauge and air outlet nozzle are all installed on the panel surface through the panel, and the remaining pneumatic control components are all installed in the enclosed space formed by the panel and the inside of the equipment box.

5. The non-magnetic pneumatic bomb disposal wire cutter according to claim 2, characterized in that: The front end of the shell is reduced in diameter, and a groove is provided along the circumference of its inner wall. The inner wall of the tail of the wire pressing sleeve is provided with a positioning groove along its circumference. A return spring is provided inside the groove and is sleeved on the fiber ring and extends into the positioning groove. The positioning groove is sleeved on the shell and can slide back and forth axially relative to the shell and the fixed sleeve. The outer wall of the fixed sleeve is also provided with a guide groove of a certain length. The wire pressing sleeve guide groove is provided with a guide screw passing through its side wall. One end of the guide screw is located in the guide groove. The side of the fixed sleeve is also provided with a cutting opening.

6. The non-magnetic pneumatic bomb disposal wire cutter according to claim 2, characterized in that: The movable blade block and the fixed blade block are both made of non-magnetic materials.

7. The non-magnetic pneumatic bomb disposal wire cutter according to claim 2, characterized in that: A sealing rubber ring is also provided on the side wall of the piston and the sealing ring and is in sealing contact with the housing.

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