Bidirectional hydrodynamic cavitation explosive drawing-out method suitable for long projectile body

Abstract

The invention discloses a two-way hydrodynamic cavitation explosive taking-out method suitable for a long projectile body, and belongs to the technical field of scrapped ammunition treatment.The two-way hydrodynamic cavitation explosive taking-out method comprises a lifting mechanism for bearing the long projectile body, a cavitation water tank and a spray rod assembly are arranged at the two ends of the long projectile body respectively, and the spray rod assembly sprays high-pressure water to an explosive column in the long projectile body entering the cavitation water tank; a collecting box is arranged on the side face of the cavitation water tank to complete charging recovery. The long bomb body is lifted to the position with the same height as the spray rod assemblies on the two sides through the lifting mechanism, the two ends of the long bomb body are inserted into the cavitation water tanks on the two sides correspondingly, the cavitation water tanks provide a water submerging environment for the long bomb body, the spray rod assemblies spray high-pressure water into the long bomb body in the cavitation water tanks, cavitation jet flow serves as a core, and through a low-pressure double-end explosive drawing-out mode, the long bomb body can be drawn out. Separation of the shell and the charged powder is completed, and the shell is convenient to recycle. Bidirectional explosive drawing-out can be conducted on the long projectile body, safe and efficient explosive drawing-out of the medium-large-caliber long projectile body is achieved, shell recycling and explosive charging are achieved, and resource waste is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of scrap ammunition treatment, and in particular relates to a bidirectional hydraulic cavitation charge removal method suitable for a long projectile. Background Art

[0002] At present, a large number of retired ammunition are piled up in warehouses without being processed, and waste and defective products are also generated during the production process. The existing disposal method is mainly burning and blasting, but some long-body ammunition shells are of high value. Direct destruction not only pollutes the environment, brings safety risks to operators, but also causes a large waste of resources.

[0003] In view of this, technicians have developed the use of high-pressure water jet technology to remove the explosives from retired and scrapped ammunition, and then recover the shells for reuse. However, the water pressure of high-pressure water jet technology is generally above 50MPa, its erosion effect presents a "rigid" characteristic, and it mostly operates in the air, which poses a high safety risk. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a bidirectional hydraulic cavitation charge removal method suitable for a long projectile.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A bidirectional hydraulic cavitation method for removing explosives from a long projectile comprises the following steps: S1: Assemble the bidirectional hydraulic cavitation medicine removal device: arrange the cavitation water tank and the spray rod assembly outward in sequence from both ends of the lifting mechanism, and connect the spray rod assembly to the high-pressure water pipe; arrange the lifting mechanism, the cavitation water tank and the spray rod assembly along the same straight line, and the cavitation water tank and the spray rod assembly can move relative to the lifting mechanism; S2: placing the long projectile to be processed on the lifting mechanism, and driving the cavitation water tanks on both sides to fix the two ends of the long projectile in the clamping openings on both sides of the cavitation water tanks; S3: Start two sets of spray bar assemblies, and the spray bars of the spray bar assemblies spray high-pressure water into the long projectile. When the water level in the cavitation water tank is higher than the projectile, the two spray bars spray water and enter the long projectile towards each other; the cavitation water tank discharges the water mixed with medicine blocks; S4: After the medicine is removed, open the discharge valve of the cavitation water tank to drain the liquid. After the liquid is drained, the cavitation water tank and the spray rod retreat, and the empty bomb can be taken out.

[0006] Furthermore, the cavitation water tank and the spray rod assembly are both arranged on a guide rail, the long projectile is arranged directly above the guide rail and coaxial with the spray rod of the spray rod assembly, and a driving wheel driven by a driving component is provided at the bottom of the cavitation water tank for driving the end of the long projectile into the cavitation water tank; a walking mechanism is provided at the bottom of the spray rod assembly for driving the spray rod into the long projectile of the cavitation water tank.

[0007] Furthermore, the spray rod assembly includes a spray rod, a base and a mounting seat, the mounting seat is arranged on the top of the base, the spray rod is arranged through the mounting seat, the water inlet end of the spray rod can be connected to a high-pressure water pipe, the water outlet end of the spray rod can pass through the guide hole on the side wall of the cavitation water tank to enter the cavitation water tank, and the water outlet end of the spray rod is provided with a cavitation nozzle.

[0008] Furthermore, a rotating component is provided in the mounting seat for driving the spray rod to rotate.

[0009] Furthermore, an anti-collision mechanism is provided in the cavitation nozzle, and the anti-collision mechanism includes a buffer spring and a pressure sensor, one end of the buffer spring is connected to the cavitation nozzle, and the other end extends to the outside of the cavitation nozzle; the pressure sensor can be linked with the walking mechanism.

[0010] Furthermore, the walking mechanism includes a walking wheel, a second motor and a drag chain, the second motor drives the walking wheel to move on the guide rail, and the second motor is connected to the power supply through the drag chain.

[0011] Furthermore, the lifting mechanism is divided into two and is respectively arranged near the two ends of the long elastic body. The lifting mechanism includes a support seat, a lifting component and a lifting slot. The support seat is connected to the lifting slot through the lifting component. A position sensor that can be linked with the lifting component is provided on the outer wall of the long elastic body.

[0012] Furthermore, a discharge pipe is provided at the bottom of the cavitation water tank, and the outlet of the discharge pipe is arranged above the inlet of the outer collecting box; a filter screen is provided at the top of the collecting box, and the mesh diameter of the filter screen is ≤5mm.

[0013] Furthermore, the cavitation water tank is made of 316L stainless steel, and the water temperature sprayed by the spray bar assembly is ≤45°C and the water pressure is ≤25MPa.

[0014] Furthermore, the length of the long projectile is ≤4000mm and the outer diameter is ≤300mm.

[0015] Compared with the prior art, the present invention has the following technical advances: The present invention lifts the long projectile to the same height as the spray bar assemblies on both sides through a lifting mechanism, inserts the two ends of the long projectile into two cavitation water tanks respectively, uses the cavitation water tanks to provide a water-flooded environment for the long projectile, and sprays high-pressure water to the long projectile body charge column entering the cavitation water tank through the spray bar assembly. With the cavitation jet as the core, the shell and the charge are separated through the form of low-pressure double-end charge removal, which facilitates the recovery of the shell; at the same time, the taken charge enters the collection box for recovery. The present invention can perform two-way charge removal on the long projectile, realize safe and efficient charge removal of medium and large caliber long projectiles, and provide a solution for the resource utilization of high-value engines, warhead shells and charges. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] In the attached picture: Figure 1 It is a structural schematic diagram of a bidirectional hydraulic cavitation drug removal device in an embodiment of the present invention; Figure 2 for Figure 1 A top view of the bidirectional hydraulic cavitation drug removal device; Figure 3 for Figure 1 Left view of the bidirectional hydraulic cavitation drug removal device; Figure 4 Schematic diagram of the coordination between the spray bar and the anti-collision mechanism in an embodiment of the present invention.

[0018] In the figure: 1-spray rod assembly; 2-cavitation water tank; 3-long elastic body; 4-lifting mechanism; 5-collection box; 6-drag chain; 7-guide rail; 8-travel mechanism; 9-support plate; 10-spray rod; 11-base; 12-mounting seat; 13-first motor; 14-second motor; 15-support seat; 16-lifting component; 17-lifting slot; 18-discharge pipe; 19-filter screen; 20-guide hole; 21-high-pressure water pipe; 22-driving component; 23-pressure sensor; 24-buffer spring; 25-baffle; 26-push plate; 27-guide rod. DETAILED DESCRIPTION

[0019] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, a bidirectional hydraulic cavitation method for removing explosives from a long projectile comprises the following steps: S1: Assemble the bidirectional hydraulic cavitation medicine removal device: arrange the cavitation water tank 2 and the spray bar assembly 1 outward from both ends of the lifting mechanism 4 in sequence, and connect the spray bar assembly 1 to the high-pressure water pipe 21; arrange the lifting mechanism 4, the cavitation water tank 2 and the spray bar assembly 1 along the same straight line, and the cavitation water tank 2 and the spray bar assembly 1 can move relative to the lifting mechanism 4; S2: placing the long projectile 3 to be processed on the lifting mechanism 4, driving the cavitation water tanks 2 on both sides to fix the two ends of the long projectile 3 in the clamping openings on both sides of the cavitation water tanks 2; S3: Start the two spray bar assemblies 1, and the spray bar 10 of the spray bar assembly 1 sprays high-pressure water into the long projectile 3. When the water level in the cavitation water tank 2 is higher than the projectile, the two spray bars 10 enter the long projectile 3 in opposite directions while spraying water; the cavitation water tank 2 discharges the water mixed with the medicine block at the same time; S4: After the medicine is removed, the discharge valve of the cavitation water tank 2 is opened to discharge the liquid. After the discharge is completed, the cavitation water tank and the spray rod retreat, and the empty bomb can be taken out.

[0021] The spray bar assembly using this solution can spray high-pressure water into the long projectile entering the cavitation water tank. With the cavitation jet as the core, the medium and large caliber long projectile can be safely and efficiently removed through the form of low-pressure double-end removal of charges, and the shell and charge can be separated, so that the shell can be recycled. During the removal of charges, the projectile is submerged in water, and the safety risk is low. The present invention can solve the problem of separating the shell and charge of 30km, 70km long retired or defective long-range rockets or high-burning rate engines, and reduce resource waste.

[0022] In a specific embodiment of the present invention, Figure 1 As shown, the cavitation water tank 2 and the spray bar assembly 1 are both arranged on the guide rail 7, the long projectile 3 is arranged directly above the guide rail 7 and coaxial with the spray bar 10 of the spray bar assembly 1, and the bottom of the cavitation water tank 2 is provided with a driving wheel driven by a driving component 22, which is used to drive the long projectile 3 into the cavitation water tank 2; the bottom of the spray bar assembly 1 is provided with a walking mechanism 8, which is used to drive the spray bar assembly 1 into the cavitation water tank 2 and the long projectile 3. Among them, the volume calculation formula of the cavitation water tank 2 satisfies v≥v1 / 2+v2*1 / 3, wherein v1 is the volume of the projectile to be treated, and v2 is the maximum flow rate of the high-pressure water of the spray bar.

[0023] As a preferred structure, Figure 1 As shown, the spray bar assembly 1 includes a spray bar 10, a base 11 and a mounting seat 12. The mounting seat 12 is arranged on the top of the base 11. The spray bar 10 is arranged through the mounting seat 12. The water inlet end of the spray bar 10 can be connected to the high-pressure water pipe 21. The water outlet end of the spray bar 10 can penetrate the guide hole 20 on the side wall of the cavitation water tank 2 and enter the cavitation water tank 2. The water outlet end of the spray bar 10 is provided with a cavitation nozzle (not shown in the figure). The spray bar assembly 1 enters the cavitation water tank 2 under the drive of the walking mechanism 8, and continues to advance to enter the long projectile 3, using the cavitation jet to remove the medicine, so as to achieve the purpose of separating the shell from the charge, and then recover the high-value shell. In the specific implementation, the water temperature sprayed by the spray bar 10 is ≤45℃ and the water pressure is ≤25MPa; the travel speed is controlled at 0-10 mm / s, and the rotation speed is 0-10 r / min.

[0024] In specific manufacturing, a rotating component is provided in the mounting seat 12 for driving the spray rod 10 to rotate. The rotating component includes a first motor 13 and a gear transmission group (not shown in the figure), and the gear transmission group includes a driving gear and a driven gear that mesh with each other. The motor is coaxially fixed with the driving gear 13, and the driven gear is fixed on the outer wall of the spray rod. The first motor is used to drive the spray rod to rotate, so that the water flow can be evenly contacted with the charge, and the concentrated spraying of the water flow can be avoided to erode the inner wall of the shell.

[0025] Further optimize the above scheme, such as Figure 4 As shown, the mounting seat 12 is slidably matched with the spray rod 10, and the spray rod 10 and the mounting seat 12 are connected through a pressure sensor 23 and a buffer spring 24; the pressure sensor 23 can be linked with the walking mechanism 8. Among them, the pre-pressure of the buffer spring is ≥100kgf. The pressure sensor 23 and the buffer spring 24 form an anti-collision mechanism. When the spray rod hits the unpeeled medicine column, the medicine column gives a reaction force to the spray rod, and the elastic force feedback of the buffer spring ensures that the spray rod will not have a rigid collision with the medicine surface of the medicine; when the pressure detected by the pressure sensor exceeds the upper limit value, it is fed back to the walking mechanism through the pressure sensor, and the spray rod is automatically controlled to retreat.

[0026] When making specific Figure 4 As shown, a spray rod hole for slidingly matching with the spray rod 10 is provided on the upper part of the mounting seat 12, a spring hole for penetrating the buffer spring 24 is provided on the lower part, a baffle plate 25 is provided at one end of the outer side of the base 11, a pressure sensor 23 is installed on the inner side of the baffle plate 25, one end of the buffer spring 24 is connected to the pressure sensor 23, and the other end passes through the spring hole and is connected to the push plate 26, and the upper end of the push plate 26 is connected to the spray rod 10. At the same time, an upright guide rod 27 is provided at the rear end of the spray rod 10, and a long strip slide groove is provided on the top of the baffle plate 25 and the base 11, respectively providing moving space and guiding for the guide rod 27 and the push plate 26 to move forward and backward.

[0027] In a specific embodiment of the present invention, Figure 2 , 3As shown, the walking mechanism 8 is connected to the bottom of the base 11, and the walking mechanism 8 includes a walking wheel (not shown in the figure), a second motor 14 and a drag chain 6. The second motor 14 drives the walking wheel to move on the guide rail 7, and the second motor 14 is connected to the power supply through the drag chain 6. At the same time, a roller and a driving wheel (not shown in the figure) are provided at the bottom of the cavitation water tank 2, and the driving wheel is used to move the cavitation water tank relative to the long elastic body so that the end of the long elastic body enters the cavitation water tank. A support plate 9 is provided on the top of the walking wheel and the roller. The support plate 9 is slidably matched with the guide rail 7 through the walking wheel and the roller, and the spray rod assembly 1 and the cavitation water tank 2 are both installed on the support plate 9. After the long elastic body is fixed in the cavitation water tank, it no longer moves. Then, the support plate 9 can drive the upper spray rod assembly 1 and the cavitation water tank 2 to move back and forth along the length direction of the guide rail 7 under the drive of the second motor 14. An eccentric roller is also arranged between the support plate and the guide rail. Multiple rollers and eccentric rollers are used together to adjust the preload between the roller and the guide rail at any time to ensure smooth operation. The load capacity of a single roller is ≥50 kN. Multiple rollers and eccentric rollers and guide rails form a roller guide rail, and its working principle is the same as that of the roller guide rail in the prior art.

[0028] When designing specifically, Figure 1 As shown, the lifting mechanism 4 is two and is respectively arranged near the two ends of the long projectile 3. The lifting mechanism includes a support seat 15, a lifting component 16 and a lifting slot 17. The support seat 15 is connected to the lifting slot 17 through the lifting component 16. A position sensor (not shown in the figure) that can be linked with the lifting component 15 is provided on the outer wall of the long projectile 3. Among them, the lifting component can be lifted and lowered by a servo motor driving a ball screw; the height of the lifting of the long projectile by the lifting mechanism is measured and adjusted by the position sensor, so that the projectile to be treated and the center line of the spray rod assembly are at the same horizontal position. At the same time, a mechanical positioning pin is installed on the lifting slot to detect the installation position of the projectile.

[0029] When making specific Figure 2 , 3 As shown, the cavitation water tank 2 is made of 316L stainless steel, and a discharge pipe 18 is provided at the bottom of the cavitation water tank 2, and the outlet of the discharge pipe 18 is arranged above the inlet of the collection box 5; a filter screen 19 is provided at the upper part of the collection box 5, and the mesh diameter of the filter screen 19 is ≤5mm, and the effective loading capacity is ≥0.25m³. This structure can realize the coarse filtration and collection of the charge.

[0030] To further optimize the above scheme, both the first motor and the second motor are servo motors; at the same time, a water level detection sensor is set in the cavitation water tank. The position sensor, water level detection sensor and all servo motors are connected to the controller, and the drug removal process can be automatically completed through the remote control system, further improving the safety factor and work efficiency of drug removal.

[0031] The present invention is suitable for charge stripping treatment of engines and warheads with a projectile caliber of less than 300 mm and a projectile length of less than 4000, with a maximum processing capacity of 110 kg / h and high processing efficiency. The charge stripping is carried out by a cavitation jet method, and the cavitation jet pressure is ≤25 MPa. The treatment is carried out by a two-way charge stripping method at both ends, which not only meets the production capacity requirements but also ensures the safety of the treatment process.

[0032] The specific application process of the present invention is as follows: (1) With manual assistance, the long-range rocket engine body is placed on the lifting mechanism. The lifting mechanism starts to rise under the drive of the servo motor and lifts the body to the clamping position height. The cavitation water tank pushes the long body on the lifting mechanism into the clamping opening of the lifting slot under the drive of the servo motor. The front opening of the body and the sealing ring of the clamping opening of the lifting slot are tightly fitted by the thrust. After the proximity switch detects that it is in place, the body is clamped. (2) Driven by the first motor, the spray rod starts to rotate at a constant speed of 5 r / min. At this time, the valve of the high-pressure water pipe opens, and high-pressure water enters the spray rod. The high-pressure water pressure is maintained at 23 MPa for water spraying; (3) The water level in the cavitation water tank is fed back to the controller through the water level detection device to control the opening of the lower gate of the cavitation water tank, thereby adjusting the water level in the cavitation water tank to ensure that the missile is submerged in water. When the water level is lower than the lower limit, the gate is closed; when the water level is higher than the upper limit, the gate is fully opened; when the water level is between the upper and lower limits, the gate is half open to maintain the balance of water inflow and outflow and maintain the water level.

[0033] (4) When the water level in the cavitation water tank is above the projectile, the spray rod starts to move forward slowly at a speed of 3 mm / s driven by the motor. During the advancement process, the high-pressure water flow gradually peels off the medicine column in the projectile into small pieces, which flow into the cavitation water tank with the water flow, and flow into the collection box below through the discharge pipe. The filter net can filter out large particles of medicine to prevent the medicine blocks from clogging the pipeline. The filtered water and medicine particles are recycled.

[0034] (5) During the advancement of the spray boom, if the advancement speed is too fast and the spray boom hits an unpeeled drug column, the drug column will exert a reaction force on the spray boom through the buffer spring, which will be fed back to the servo motor through the pressure sensor, automatically controlling the spray boom to retreat. This process is repeated for about 3 to 4 hours until the drug column in the projectile is completely peeled off, the spray boom stops passing high-pressure water, and retreats to its initial position.

[0035] (6) After the medicine is removed, open the discharge valve of the cavitation water tank to release the liquid. After the liquid is released, the cavitation water tank and the spray rod retreat and the empty bomb can be taken out.

[0036] In summary, except for the loading operation which requires manual assistance, the other processes of the present invention are completed by a remote control system, with high processing efficiency. During the drug removal process, the projectile is submerged in water, with low safety risks, and the drug removal water can be recycled after being filtered through a filter, thereby improving the environmental friendliness of the treatment. At the same time, the charge and the shell can be eroded and separated when the water pressure is ≤25MPa, which is safer than other treatment methods. The feeding of the drug removal process is achieved by controlling the movement of the spray rod through a controller, which can significantly improve the drug removal efficiency. The present invention is suitable for bidirectional drug removal of long projectiles, has high safety performance, is conducive to the recycling of the shell and the charge, and reduces resource waste.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A bidirectional hydraulic cavitation method for removing explosives from long projectiles, characterized in that: The following steps are involved: S1: Assemble the bidirectional hydraulic cavitation medicine removal device: arrange the cavitation water tank and the spray rod assembly outward in sequence from both ends of the lifting mechanism, and connect the spray rod assembly to the high-pressure water pipe; arrange the lifting mechanism, the cavitation water tank and the spray rod assembly along the same straight line, and the cavitation water tank and the spray rod assembly can move relative to the lifting mechanism; S2: placing the long projectile to be processed on the lifting mechanism, and driving the cavitation water tanks on both sides to fix the two ends of the long projectile in the clamping openings on both sides of the cavitation water tanks; S3: Start two sets of spray bar assemblies, and the spray bars of the spray bar assemblies spray high-pressure water into the long projectile. When the water level in the cavitation water tank is higher than the projectile, the two spray bars spray water and enter the long projectile towards each other; the cavitation water tank discharges the water mixed with medicine blocks; S4: After the medicine is removed, open the discharge valve of the cavitation water tank to drain the liquid. After the liquid is drained, the cavitation water tank and the spray rod retreat, and the empty bomb can be taken out.

2. A bidirectional hydraulic cavitation method for removing explosives from a long projectile according to claim 1, characterized in that: The cavitation water tank and the spray rod assembly are both arranged on the guide rail, the long projectile is arranged directly above the guide rail and coaxial with the spray rod of the spray rod assembly, a driving wheel driven by a driving component is provided at the bottom of the cavitation water tank, which is used to drive the end of the long projectile to enter the cavitation water tank; a walking mechanism is provided at the bottom of the spray rod assembly, which is used to drive the spray rod to enter the long projectile of the cavitation water tank.

3. A bidirectional hydraulic cavitation method for removing explosives from a long projectile according to claim 2, characterized in that: The spray rod assembly includes a spray rod, a base and a mounting seat, wherein the mounting seat is arranged on the top of the base, the spray rod is arranged through the mounting seat, the water inlet end of the spray rod can be connected to a high-pressure water pipe, the water outlet end of the spray rod can pass through a guide hole on the side wall of the cavitation water tank to enter the cavitation water tank, and the water outlet end of the spray rod is provided with a cavitation nozzle.

4. A bidirectional hydraulic cavitation method for removing explosives from a long projectile according to claim 3, characterized in that: A rotating component is arranged inside the mounting seat, which is used for driving the spray rod to rotate.

5. A bidirectional hydraulic cavitation method for removing explosives from a long projectile according to claim 3, characterized in that: An anti-collision mechanism is arranged inside the cavitation nozzle, and the anti-collision mechanism comprises a buffer spring and a pressure sensor. One end of the buffer spring is connected to the cavitation nozzle, and the other end extends to the outside of the cavitation nozzle; the pressure sensor can be linked with the walking mechanism.

6. A bidirectional hydraulic cavitation method for removing explosives from a long projectile according to claim 3, characterized in that: The walking mechanism comprises a walking wheel, a second motor and a drag chain. The second motor drives the walking wheel to move on the guide rail, and the second motor is connected to a power source through the drag chain.

7. A bidirectional hydraulic cavitation method for removing explosives from a long projectile according to claim 1, characterized in that: There are two lifting mechanisms, which are respectively arranged near the two ends of the long elastic body. The lifting mechanism includes a support seat, a lifting component and a lifting slot. The support seat is connected to the lifting slot through the lifting component. A position sensor that can be linked with the lifting component is provided on the outer wall of the long elastic body.

8. A bidirectional hydraulic cavitation method for removing explosives from a long projectile according to claim 1, characterized in that: A discharge pipe is provided at the bottom of the cavitation water tank, and the outlet of the discharge pipe is arranged above the inlet of the outer collecting box; a filter screen is provided at the top of the collecting box, and the mesh diameter of the filter screen is ≤5mm.

9. A bidirectional hydraulic cavitation method for removing explosives from a long projectile according to claim 1, characterized in that: The cavitation water tank is made of 316L stainless steel, and the water temperature sprayed by the spray bar assembly is ≤45°C and the water pressure is ≤25MPa.

10. A bidirectional hydraulic cavitation method for removing explosives from a long projectile according to any one of claims 1 to 9, characterized in that: The length of the long elastic body is ≤4000mm and the outer diameter is ≤300mm.

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