Device for improving PBX pouring charging efficiency

Abstract

The utility model discloses a device for improving PBX pouring charging efficiency. The device comprises a vacuum pouring tank for placing a plurality of projectile bodies to be poured, a plurality of projectile body placing racks arranged outside the projectile bodies to be poured, and a charging riser assembly arranged at the top of each projectile body to be poured, the projectile body placing frame comprises a projectile body protection partition plate and a plurality of supporting pull rods, a plurality of projectile body holes for placing projectile bodies to be poured are formed in the surface of the projectile body protection partition plate, a plurality of projectile body clamps for clamping and fixing the projectile bodies to be poured are arranged at the edge of each projectile body hole, and one end of each supporting pull rod is fixedly connected with the bottom of the vacuum pouring tank; and the other end of the elastic body penetrates through the elastic body protection partition plate and is locked on the surface and the bottom surface of the elastic body protection partition plate through self-locking nuts. According to the utility model, on the premise of not influencing the charging quality of the shell, the production from one-shot ammunition body casting charging to multiple-shot ammunition body casting charging at the same time is realized, so that the PBX casting charging production efficiency is obviously improved, and the problem of the casting charging production efficiency is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of PBX casting charging process equipment in weapon ammunition warheads, specifically to a device for improving the efficiency of PBX casting charging, applicable to the shell charging of PBX casting explosives. Background Technology

[0002] The process of casting explosives into the warhead casing refers to the process of processing PBX (Personalized Power Unit) explosives and then loading them into the casing using different techniques. Common casting methods include: PBX casting, melt casting, and thermoplastic casting. The existing PBX casting process involves securing a single casing with its opening facing upwards using a casting tool. After securing it firmly, the casing, along with the casting auxiliary equipment, is lifted and placed into the casting tank of a vacuum vibration casting system. Then, from bottom to top, the storage tank (with the casting tank cover) and the casting hopper (with the storage tank cover) of the vacuum vibration casting system are lifted onto the casting tank and connected and secured (see...). Figure 1 Then, the casting tank is evacuated. Through the control interface of the vacuum vibration casting system, once the vacuum level in the casting tank reaches the process value, the discharge valve is remotely opened to load the casing with propellant. After the casing is loaded with propellant, the vacuum in the casting tank is released, and then the casting hopper (with the storage tank cover) and the storage tank (with the casting tank cover) are lifted off in sequence. Finally, the projectile to be cast, along with the auxiliary equipment for casting and loading, is lifted off the casting tank for post-processing. The entire casting and loading process is lengthy, with complex and tedious pre- and post-loading preparations, requiring a high level of personnel involvement and involving significant labor intensity, severely restricting production efficiency. Therefore, improving the production efficiency of PBX casting and loading is particularly important.

[0003] By reviewing the entire process of existing PBX (Publicly-Private Vehicle) propellant loading, it was found that the key factor affecting and restricting the production efficiency of PBX propellant loading is the shell loading process. Considering the structure of the process equipment used during casting, the key to solving the above problem is to innovatively design a new propellant loading process device to achieve simultaneous casting and loading of multiple shells at one time, thereby improving the production efficiency of shell propellant loading. Therefore, based on the requirements, this utility model provides a device for improving the efficiency of PBX propellant loading. Summary of the Invention

[0004] To meet the above technical requirements, the purpose of this utility model is to provide a device for improving the efficiency of PBX casting and loading, addressing the shortcomings of existing PBX casting and loading processes. This device adopts a modular and split design, which has the advantages of simple structure, convenient operation, and wide applicability. Without affecting the quality of the shell loading, it realizes the production of multiple shell casting and loading at the same time, thereby significantly improving the production efficiency of PBX casting and loading and solving the problem of casting and loading production efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a device for improving the efficiency of PBX casting and loading, comprising a vacuum casting tank for placing multiple projectiles to be cast, a projectile placement rack externally mounted on the multiple projectiles to be cast, and a blasting riser assembly mounted on the top of each projectile to be cast; the projectile placement rack includes a projectile protective partition and multiple support rods, the surface of the projectile protective partition is provided with multiple projectile holes for placing the projectiles to be cast, and each projectile hole edge is provided with multiple projectile clamps for clamping and fixing the projectiles to be cast, one end of the support rod is fixedly connected to the bottom of the vacuum casting tank, the other end passes through the projectile protective partition, and is locked on the surface and bottom of the projectile protective partition by self-locking nuts; the blasting riser assembly has a projectile mounting plate, on which blasting risers of the same number and coaxiality as the projectiles to be cast are respectively provided.

[0006] Furthermore, the bottom of the vacuum casting tank is provided with a projectile support plate for placing the projectile to be cast, and one end of each support rod is connected to the projectile support plate by bolts.

[0007] The projectile clamp is made of long strip-shaped silicone material. On one side of the projectile clamp along its length, it is fixedly connected to the surface and bottom of the projectile protective partition by a wing nut and an external hex bolt, respectively. On the other side of the projectile clamp along its length, the projectile clamp is in close contact with the outer wall of the projectile to be poured.

[0008] The projectile mounting plate is set on top of each projectile to be cast, and the projectile mounting plate is provided with multiple discharge ports near the edge for placing the injection risers. The bottom of the injection risers is embedded inside the projectile to be cast. The projectile mounting plate is provided with a drainage port at the center. The bottom of the drainage port is provided with a conical drainage cap welded to the surface of the projectile mounting plate. The drainage port is connected to each injection riser by a drainage guard plate. The drainage guard plate is provided with drainage grooves at the connection between the drainage port and the injection riser.

[0009] The bottom of the injection riser is provided with an internal thread, and one end of the inner liner is provided with an external thread. The injection riser and one end of the inner liner are fixed together by the internal and external threads, and the other end of the inner liner is embedded in the projectile to be injected.

[0010] The technical solution provided by this utility model uses the projectile to be cast as the main body, with a projectile placement frame set below it. A projectile clamp is fixedly mounted on the projectile placement frame, which is located inside the casting tank of a vacuum vibration casting system. A propellant riser is set above the projectile to be cast, and an inner liner is fixedly mounted at the bottom of the propellant riser. The inner liner is determined according to the inner cavity size of the propellant loading port of the projectile to be cast. Ammunition is cast into the projectile through the propellant riser.

[0011] The beneficial effects of this utility model are: under the premise of ensuring that the quality of the cast explosive is not affected, it solves the problem that the existing casting explosive device cannot complete the simultaneous casting of multiple projectiles in a casting tank with a single discharge port, improves the production efficiency of PBX casting explosive process, reduces the labor intensity of operators, and has good application value in the field of PBX casting explosive loading. Attached Figure Description

[0012] The structure and technical features of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of an existing cast-in-place explosive charge structure.

[0014] Figure 2 This is a top view of the structure of this utility model.

[0015] Figure 3 for Figure 2 A schematic diagram of the structure along the AA direction.

[0016] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0017] Figure 5 This is a schematic diagram showing the connection between the support rod and the protective partition of the projectile in this utility model.

[0018] Figure 6 This is a schematic diagram of the installation of the projectile clamp and the projectile protective partition in this utility model.

[0019] Figure 7 yes Figure 6 A magnified view of a portion of the image.

[0020] Appendix Figure 1-6 In the middle, 1. casting hopper; 2. storage tank; 3. vacuum casting tank; 4. projectile to be cast; 5. projectile protective partition; 6. injection riser; 7. drainage port; 8. projectile mounting plate; 9. drainage guard plate; 10. support rod; 11. projectile lower support plate; 12. projectile clamp; 13. wing nut; 14. bullet hole; 15. self-locking nut; 16. drainage cap; 17. inner liner sleeve; 19. bolt. Detailed Implementation

[0021] Appendix Figure 2-7 This is an embodiment of the present invention, which discloses a device for improving the efficiency of PBX casting and loading. It includes a vacuum casting tank 3 for holding three projectiles 4 to be cast, a projectile placement frame outside the three projectiles 4 to be cast, and a blasting riser 6 assembly on the top of each projectile 4 to be cast. The projectile placement frame includes a projectile protective partition 5 and four support rods 10. The surface of the projectile protective partition 5 is provided with three projectile holes for placing the projectiles 4 to be cast. At the edge of each projectile hole, there are two projectile clamps 12 for clamping and fixing the projectiles 4 to be cast. One end of the support rod 10 is fixedly connected to the bottom of the vacuum casting tank 3, and the other end passes through the projectile protective partition 5 and is locked on the surface and bottom of the projectile protective partition 5 by self-locking nuts 15.

[0022] The bottom of the vacuum casting tank 3 is provided with a projectile lower support plate 11 for placing the projectile 4 to be cast, and one end of each support rod 10 is connected to the projectile lower support plate 11 by bolts 19.

[0023] Figure 2 and Figure 3 As shown, three bullet holes 14 are evenly distributed on the projectile protective partition 5 for simultaneously placing a corresponding number of projectiles 4 to be poured; the height of the projectile placement frame can be adjusted, mainly based on the center of gravity height of the projectile 4 to be poured, by adjusting the self-locking nut 15 installed on the support rod 10 under the projectile protective partition 5, so that the height of the projectile protective partition 5 is higher than the center of gravity height of the projectile 4 to be poured, thereby ensuring the safety protection of the projectile 4 to be poured during the loading process.

[0024] The projectile clamp 12 is made of a long strip of silicone material. On one side of the projectile clamp 12 along its length, it is fixedly connected to the surface and bottom of the projectile protective partition 5 by means of a wing nut 13 and a bolt 19, respectively. On the other side of the projectile clamp 12 along its length, the projectile clamp 12 is in close contact with the outer wall of the projectile 4 to be cast.

[0025] Figure 6 and Figure 7 As shown, the projectile clamp 12 clamps and fixes the projectile 4 to be cast on the projectile placement rack. It is installed on the projectile protective partition 5 and fixedly connected to the projectile by bolts 19 and wing nuts 13, which can greatly improve the assembly and disassembly efficiency of the projectile clamp 12. The projectile clamp 12 is mainly made of silicone, and its dimensions are determined according to the outer dimensions of the center of mass of the projectile 4 to be cast. This ensures that the projectile clamp 12 can clamp and fix the projectile 4 to be cast without damaging the surface of the projectile. It further positions the projectile 4 to be cast to ensure that the assembly position between the projectile 4 to be cast and the injection riser 6 is correct.

[0026] The injection riser 6 assembly has a projectile mounting plate 8, on which three injection risers 6 are respectively provided, coaxial with the projectile 4 to be injected. The projectile mounting plate 8 is located on the top of each projectile 4 to be injected, and three discharge ports for placing the injection risers 6 are provided near the edge of the projectile mounting plate 8. The bottom of the placed injection risers 6 is embedded inside the projectile 4 to be injected. The center of the projectile mounting plate 8 is provided with a drainage port 7, and the bottom of the drainage port 7 is provided with a conical drainage cap 16 welded to the surface of the projectile mounting plate 8. The drainage port 7 is connected to each injection riser 6 by a drainage guard plate 9. Drainage grooves are opened at the connection between the drainage guard plate 9 and the drainage port 7 and the injection riser 6.

[0027] The injection riser 6 is used to collect the PBX casting explosive flowing out from the single outlet (the discharge port of the storage tank 2) inside the casting tank. Then, through three evenly distributed discharge positions on the projectile mounting plate 8 of the injection riser 6, the collected PBX casting explosive is injected into the projectile 4 to be cast, which is placed below the injection riser 6. The three evenly distributed discharge positions are located on the projectile mounting plate 8, further ensuring the coaxiality between the discharge port position of the injection riser 6 and the three projectiles 4 to be cast placed on the projectile mounting rack. This ensures accurate assembly between the projectile 4 and the injection riser 6, and that all the PBX explosive is injected into the projectile 4 to be cast. In the projectile body 4, a flow-guiding cap 16 welded to the center of the projectile body mounting plate 8 is used to improve the flowability of the PBX cast explosive collected by the injection riser 6, further preventing the efficiency and quality of the casting from being affected by excessive accumulation of PBX cast explosive. A flow-guiding guard plate 9 welded to the upper end face of the projectile body mounting plate 8 further encloses the area at the discharge port and the location of the flow-guiding cap 16 on the projectile body mounting plate 8 to form a closed loop, preventing the PBX cast explosive collected by the injection riser 6 from flowing freely on the projectile body mounting plate 8 and overflowing, directly reducing the loss of PBX cast explosive during the injection process and indirectly improving the loading efficiency.

[0028] The bottom of the injection riser 6 is provided with an internal thread, and one end of the inner liner 17 is provided with an external thread. The injection riser 6 and one end of the inner liner 17 are fixed together by the internal and external threads, and the other end of the inner liner 17 is embedded in the inside of the projectile 4 to be injected.

[0029] Figure 4As shown, the inner liner sleeve 17 mainly serves to protect the opening of the projectile body 4 to be cast. It is determined based on the inner cavity size of the opening of the projectile body 4 to be cast and is installed on the lower end face of the projectile mounting plate 8. The outer thread of one end of the inner liner sleeve 17 is threaded to the inner thread at the bottom of the injection riser 6. The other end of the inner liner sleeve 17 is fitted with the inner cavity of the opening of the projectile body 4 to be cast, so that the inner cavity of the projectile body 4 to be cast and the injection riser 6 form a simple sealed environment, avoiding the accumulation of PBX explosive at the opening of the projectile body and causing excessive loss of PBX explosive. By using the inner liner sleeve 17 to reduce the loss of PBX explosive, the loading efficiency is indirectly improved.

[0030] This utility model is completed through the following steps during operation:

[0031] 1) Pre-production preparation: Assemble the projectile placement plate, 4 support rods 10, projectile protective partition 5, and 4 sets of nuts (8 pieces) in order from bottom to top. After assembly, adjust the nuts installed on the support rods 10 and under the projectile protective partition 5 to ensure that the projectile placement frame is firmly connected and in a horizontal state. Use hex bolts 19 and wing nuts 13 to fix the projectile clamp 12 in the projectile placement hole in the projectile clamp mounting slot of the projectile protective partition 5 to ensure that the size of the projectile clamp 12 matches the shape of the projectile 4 to be poured, so as to play a clamping and fixing role. After all the components of the projectile placement frame are assembled, install eye bolts on the projectile mounting plate 8 and use an explosion-proof crane to lift it and place it in the pouring tank.

[0032] 2) Preparation of the projectile body 4 to be cast: Transport the packaging box containing the projectile body 4 to the casting workshop. Open the packaging box and use slings and an explosion-proof crane to lift the projectile body 4 onto the horizontal loading frame. The operator cleans and inspects the appearance of the projectile body 4. After inspection, use a flipping device and an explosion-proof crane to lift the projectile body 4 and flip it to a vertical position. Install eye bolts at the lifting points of the projectile body 4. Use slings and an explosion-proof crane to lift the projectile body 4 and place it into the projectile mounting hole of the projectile placement rack. Place the other two projectile bodies 4 into the projectile mounting holes in turn and remove the eye bolts. During the lifting and placement process, the operator should gently support the projectile body 4 to avoid excessive swinging and unnecessary bumps or damage, and to facilitate the installation of the projectile body 4.

[0033] 3) Installation of injection riser 6: Apply silicone grease to the external thread of the inner liner sleeve 17 and the internal thread of the injection riser 6. After applying the silicone grease, fix the connection. After the connection is completed, the operator uses an explosion-proof crane to lift the injection riser 6 and place it on the mouth end face of the projectile body 4 to be injected. During the installation process, ensure that the inner liner sleeve 17 fits the inner cavity of the mouth of the projectile body 4 to be injected, that is, the inner liner sleeve 17 enters the inner cavity of the mouth of the projectile body 4 to be injected. After the installation is completed, it is necessary to ensure that the projectile placement plate of the injection riser fits the mouth end face of the projectile body 4 to be injected, without obvious tilting or depression.

[0034] 4) Preheating of the projectile body 4 to be cast: Before loading the propellant, the preheating of the projectile body 4 to be cast is also completed. From bottom to top, the storage tank 2 (with the casting tank cover) and the casting hopper 1 (with the storage tank 2 cover) are hoisted onto the casting tank and connected and fixed. The corresponding thermal pipelines and vacuum pipelines are connected. The hot oil circulation system is started to heat the casting tank, storage tank 2, casting hopper 1, etc., and at the same time, the projectile body 4 to be cast is preheated.

[0035] 5) Hoisting and securing the mixing pot: Hoist the mixing pot containing the slurry onto the electric tilting frame and secure it.

[0036] 6) Mixing pot turning over and discharging: The electric turning frame is manually operated to add the slurry in the mixing pot into the pouring hopper 1, and then the mixing pot is cleaned manually.

[0037] 7) Vacuum storage tank 2: Press the vacuum button to vacuum storage tank 2. After the vacuum residual pressure in storage tank 2 meets the requirements (vacuum degree ≤ 1kPa), the operators who are pouring and loading the explosives should leave the workshop site and go to the remote control room.

[0038] 8) Process the slurry into storage tank 2: remotely open the automatic feeding valve under the casting hopper 1 and use the feeding valve to adjust the flow rate of the explosive.

[0039] 9) Unvacuuming storage tank 2: When the slurry in the pouring hopper 1 flows down to the point where only a small amount of slurry remains at the closed valve of the discharge valve (to avoid breaking the vacuum), turn off the vacuum button and depressurize storage tank 2 to normal pressure.

[0040] 10) Lifting the casting hopper 1: Lift the casting hopper 1 above the storage tank 2.

[0041] 11) Vacuuming the casting tank: Press the vacuum button to evacuate the casting tank, with a vacuum degree ≤1kPa.

[0042] 12) Casting and loading of projectile 4: After the vacuum residual pressure in the casting tank meets the requirements, open the discharge valve below the storage tank 2 to load the projectile 4. In order to avoid the vacuum breaking in the storage tank 2 during the casting process, which would affect the quality of the product, the operator will enter the workshop after a certain period of time to concentrate the slurry at the discharge valve. After the slurry in the storage tank 2 is discharged, close the discharge valve.

[0043] 13) Vacuum removal from the casting tank: Remove the vacuum from the casting tank to atmospheric pressure.

[0044] 14) Lifting off storage tank 2: When the vacuum value inside the vacuum casting tank 3 rises to constant atmospheric pressure, lift off storage tank 2 (with casting tank cover).

[0045] 15) Lifting away from injection riser 6: The operator cleans and collects the excess waste drug in injection riser 6 and inner liner 17, and uses an explosion-proof crane to lift injection riser 6 away. It is important to note that before lifting, excess residual drug on injection riser 6 and inside inner liner 17 should be cleaned and collected to prevent waste drug from scattering and causing safety hazards during the lifting process.

[0046] 16) Lifting and Transferring the Projectile Bodies 4 to be Cast: Lift the three projectile bodies 4 to be cast from the vacuum storage tank 2 in sequence. Wrap the outer surface of each projectile body 4 with a cotton quilt and place it in the curing rack. Lift the wrapped projectile bodies 4, along with the curing rack, onto the transport vehicle, secure them with cable ties, and then transport them to the curing workshop. Finally, clean the casting hopper 1, vacuum storage tank 2, discharge valve, scraper, and injection riser 6, and dispose of the waste gauze and collected waste chemicals used during the cleaning process as hazardous chemicals.

[0047] Note: Under process conditions where the casting hopper 1 is not used, the casting hopper 1 will not be hoisted and installed before production. Instead, the slurry in the mixing pot will be directly added to the storage tank 2 by manual labor for casting.

[0048] Through the above production steps, without affecting the quality of the propellant charge on the projectile body 4 to be cast, the requirement of simultaneous casting of propellant charges on three projectile bodies 4 to be cast can be met, and the loading efficiency is significantly improved. This has good application value in the field of PBX casting and loading process equipment technology.

Claims

1. A device for improving the efficiency of PBX casting and charging, characterized in that: The system includes a vacuum casting tank for holding multiple projectiles to be cast, a projectile placement rack externally mounted on the multiple projectiles to be cast, and a propellant riser assembly mounted on the top of each projectile to be cast. The projectile placement rack includes a projectile protective partition and multiple support rods. The surface of the projectile protective partition has multiple projectile holes for placing the projectiles to be cast. Each projectile hole has multiple projectile clamps at its edge for clamping and fixing the projectiles to be cast. One end of the support rod is fixedly connected to the bottom of the vacuum casting tank, and the other end passes through the projectile protective partition and is locked on the surface and bottom of the projectile protective partition by self-locking nuts. The propellant riser assembly has a projectile mounting plate, on which the same number of propellant risers as the projectiles to be cast and coaxial are respectively provided.

2. The device for improving the efficiency of PBX casting and charging according to claim 1, characterized in that: The bottom of the vacuum casting tank is equipped with a projectile support plate for placing the projectile to be cast, and one end of each support rod is connected to the projectile support plate by bolts.

3. The device for improving the efficiency of PBX casting and charging according to claim 1, characterized in that: The projectile clamp is made of long strip-shaped silicone material. On one side of the projectile clamp along its length, it is fixedly connected to the surface and bottom of the projectile protective partition by a wing nut and an external hex bolt, respectively. On the other side of the projectile clamp along its length, the projectile clamp is in close contact with the outer wall of the projectile to be poured.

4. The device for improving the efficiency of PBX casting and charging according to claim 1, characterized in that: The projectile mounting plate is set on top of each projectile to be cast, and the projectile mounting plate is provided with multiple discharge ports near the edge for placing the injection risers. The bottom of the injection risers is embedded inside the projectile to be cast. The projectile mounting plate is provided with a drainage port at the center. The bottom of the drainage port is provided with a conical drainage cap welded to the surface of the projectile mounting plate. The drainage port is connected to each injection riser by a drainage guard plate. The drainage guard plate is provided with drainage grooves at the connection between the drainage port and the injection riser.

5. The device for improving the efficiency of PBX casting and charging according to claim 1, characterized in that: The bottom of the injection riser is provided with an internal thread, and one end of the inner liner is provided with an external thread. The injection riser and one end of the inner liner are fixed together by the internal and external threads, and the other end of the inner liner is embedded in the projectile to be injected.

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